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ORD 2015-29 RELATING TO ENGINEERING DESIGN & CONSTRUCTION STANDARDS AMENDING ORD 94-29ORDINANCE NO. 2015 -29 AN ORDINANCE of the City of Bainbridge Island, Washington, relating to Engineering Design and Construction Standards, amending Ordinance No. 94 -29. WHEREAS, the City has previously adopted by ordinance certain City documents that set forth standards for certain public infrastructure design, construction, operation, and maintenance; and WHEREAS, those document have since been updated; and WHEREAS, the City Council desires to adopt an ordinance reflecting those changes; now, therefore, THE CITY COUNCIL OF THE CITY OF BAINBRIDGE ISLAND, WASHINGTON, DO ORDAIN AS FOLLOWS: Section 1. Section 2 of Ordinance No. 94 -29 of the City of Bainbridge Island is amended to read as follows: The following City documents, as presently existing and as hereafter amended, are adopted by reference: A. Engineering Design and Construction Standards dated April 1997 as revised to include the documents attached hereto as Exhibit A and incorporated herein by this reference. Section 2. This ordinance shall take effect and be in force five days after its passage, approval and publication as provided by law. PASSED by the City Council this 8th day of September, 2015. APPROVED by the Mayor this 8th day of September, 2015, 4�� 1� Anne S. Blair, Mayor ATTEST / AUTHENTICATE: Rosalind D. Lassoff, City k FILED WITH THE CITY CLERK: August 25, 2015 PASSED BY THE CITY COUNCIL: September 8, 2015 PUBLICATION DATE: September 11, 2015 EFFECTIVE DATE: September 16, 2015 ORDINACE NO.: 2015 -29 Ordinance No. 2015 -29 Exhibit A Design and Construction Standards & Specifications Additions, Deletions and /or Modifications Date 17esc.r )tion 05 -03 -00 Add Revised Drawing 10 -110 07 -06 -00 Add Revised Drawing 10 -050 07 -03 -01 Add & Replace Section 6 — Site Access 07 -03 -02 Add & Replace Section 8 — Road Elements & Roadside Features) 09 -08 -03 Delete Dwg, No. 10 -160. Add Dwg. No.'s 10 -160, 161, 162, 163, 164, 165, 166, & 167 03 -01 -04 Add & Replace Section 8 -22 — Traffic Control Signs b kLO & O m d O §�. \� < W ' �z �k �tj 70 w� �� k� Z E 3 2 %� 2 w A / / � w &2. ^ � \ � / � 0 m / z F5 w a O CL � 2 �� k 9� 7 a d ev) z U k Q/ m � � .§ \ W 0- w � @� �, E §§ �t . . 'o ¥ . L 0 , $.K� m &$ � E3 a Ik k� E a —i 0) Q; 4D (n O �§�2 r Q k 92 (A . 0 § \« \ \ L k . Z� p� 2A § +§ . LLJ X20 LL Ea IL) E LL, w a // m 0- LLJ / / o fd ��f k® E (L CL C-) w R . gU qM W W ¥ a � \� < m 0 SECTION 6 - SITE ACCESS TABLE OF CONTENTS SECTION PAGE 6 - 01 GENERAL ........................................................................................................................................ ..............................1 6 - 02 CONSTRUCTION OF ACCESS POINTS ........................................................................................ ............................... 2 6 - 03 LOCATION OF ACCESS POINTS .................................................................................................. ............................... 2 6 - 04 CORNER CLEARANCE FROM INTERSECTIONS ....................................................................... ............................... 3 6 - 05 ACCESS POINT SEPARATION OR SPACING .............................................................................. ............................... 3 6 - 06 NUMBER OF ACCESS POINTS ..................................................................................................... ............................... 4 6 - 07 ACCESS POINT TYPES, RADII AND WIDTHS ............................................................................ ............................... 4 A. DRIVEWAYS ...................................................................................................................................... ..............................4 B. RADIUS- RETU RNS .............................. ...........................................................,............................. ............................... 5 C. ASPHALT OR CEMENT CONCRETE APPROACHES ..................................................................... ............................... 5 D. NOTES - STANDARD DRAWING 6. 030 ........................................................................................ ............................... 5 E. WIDT HS .............................................................................................................................................. ..............................6 1 6 - 08 HORIZONTAL ALIGNMENT OF ACCESS POINTS ..................................................................... ............................... 6 1 6 - 09 VERTICAL ALIGNMENT OF ACCESS POINTS ............................................................................ ..............................6 6 - 10 LEFT TURN, ACCELERATION, DECELERATION LANES .......................................................... ..............................7 6 - 11 NJEDIANS ......................................................................................................................................... ..............................7 6 -12 TRANSIT STOPS ............................................................................................................................. ..............................7 A. LOCATIONS FOR BUS PUL LOUTS .................................................................................................. ..............................7 B. DESIGN OF BUS PULLOUTS ............................................................................................................ ..............................8 C. OTHER DESIGN REFERENCES ........ . .... - ........... ......................... I ............... ......... ..... ... ............................ ........ ...... ...... ... 8 Auri11997 CITY OF BAINBRIDGE ISLAND DESIGN AND CONSTRUCTION STANDARDS AND SPECIFICATIONS SECTION 6 SITE ACCESS 6 -01 GENERAL Access to State Highways is regulated by the Washington State Department of Transportation ('WSDOT). The property owner desiring access to a state highway is responsible to coordinate with WOOT for satisfactory completion of any requirements. Access to public and private roads is regulated by the City of Bainbridge Island through the Road Approach Permit process. No construction of access points or related improvements will be allowed without a valid Road Approach Permit, Permits will be evaluated and issued rased on the ability of the proposed access or use to meet these standards. If a proposed property access point cannot meet these standards, the city engineer may designate one or more access points based on traffic safety, operational needs, and conformance to as many of the requirements of these standards as possible. Access points for parking or leading areas shall be designed so that backing maneuvers from or onto a Public street right- of=way will not occur. This does not apply to single family or duplex residential uses on non - arterial roads.. Where necessary for the safe and efficient movement of txaffic, the city engineer may require investigation by the applicant to determine whether access points should be designed too limit turning movements. The city engineer may also require joint access and circulation agreements between neighboring properties to further provide safe and efficient movement of traffic. Temporary access may be granted to undeveloped property prior to completion of a final development plan if access is needed for construction of preliminary. site access. Temporary access points are subject to removal, relocation, or redesign after final development plan approval. Secondary access for emergency vehicles may be required for certain high volume or public safety sensitive developments. They shall be designed to the satisfaction of tite city engineer based on review by the Bainbridge Island Fire Marshal. No relocation, alteration or reconstruction of existing access points is permitted without prior written approval from the city engineer. i Revised July 2001 Section 6 - 'CITY OF BAINBRIDGE ISLAND DESIGN AND CONSTRUCTION STANDARDS AND SPECIFICATIONS SITE ACCESS -02 CONSTRUCTION OF ACCESS POINTS The construction of all access points involving removal of existing vertical curb or vertical curb and gutter shall conform to this section. When cutting through or crossing vertical curbs, gutters and sidewalks, access approaches must extend from the curb to back of sidewalk and be of Portland Cement Concrete. When an opening for an access or for any other purpose is to be constructed through an existing Portland Cement Concrete vertical curb, the existing curb, or curb and gutter, shall be saw cut at the limits of work or removed to the nearest construction joint and the opening replaced with standard curb and driveway, Existing street trees, street lights, traffic signal facilities, utility poles, and fire hydrants must be shown on any plan for access point construction in an area of existing vertical curb. Prior to commencing any necessary removal or relocation of any public utilities, due to construction of an access point, the applicant/developer must secure approval from the agency having ownership or control of such facilities or features. 6-03 LOCATION OF ACCESS POINTS lee Standard Drawing 6 -010. Where a property has frontage on more than one roadway, access will generally be limited to the lowest volume roadway where the impacts of a new access will be minimized. Access onto other higher volume roads may be denied in the interest of traffic safety or in order to lessen congestion on the higher volume road. Access points for commercial or industrial property uses should be placed directly opposite each other wherever possible. If this is not possible, a separation between the nearest edges of such opposite access points shall be as close to the spacing as shown on Standard Drawing 6 -010 as possible. When such spacing cannot be attained, the city engineer may require investigation to substantiate whether or not left turns should be prohibited into or out of the access point. Access to commercial or industrial use corner lots shall be located on the lower volume roadway and as close as practicable to the property line most distant from the intersection. No portion of an access will be permitted within a radius - return. The nearest edge of any access radius must be at least 3 feet from the nearest point of a fire hydrant no parking zone, utility pole, traffic signal installation or light standard, mailbox cluster or other similar appurtenance. Revised 7uly 2001 Section 6 - Page 2 CITY OF BAINBRIDGE ISLAND DESIGN AND CONSTRUCTION STANDARDS AND SPECIFICATIONS SITE ACCESS 6-04 CORNER CLEARANCE FROM INTERSECTIONS See Standard Drawing 6 -020. Standard Drawing 6 -020, Comer Clearances, shall be used to determine comer clearances from access points for residential, commercial or industrial property uses fronting arterial and non - arterial streets operating; at various speeds under signalized or stop sign traffic control. The following conditions also apply: For rural and other high -speed (45 mph or greater) roads, corner clearances on the order of two times as great as those shown on Standard Drawing 6 -020 are desirable. In cases where comer clearances are not attainable because property frontages are narrow, a minimum corner clearance of 50 feet or as close to 50 feet as possible shall be maintained. When minimum comer clearances cannot be attained, the city engineer may require investigation to substantiate whether or not left turns should be prohibited into or out of the access point. For access points near stop or signalized intersections the city engineer may require studies to determine whether stopping queues will block the access point. 6-05 ACCESS POINT SEPARATION OR SPACING ) See Standard Drawing 6 -010. Where two or more access points serve adjacent residential property uses, the minimum distance between nearest edges of access points (not including flares or radii) must be at least 10 feet. Where two or more access points serve the same or adjacent commercial or industrial property uses, the minimum distance shall be as shown on Standard Drawing 6 -010, Commercial/Industrial Access Point Spacing. Desirable access point spacing for arterials is 200 feet or more. In cases where the minimum access point spacing as shown on Standard Drawing 6 -010 are not obtainable due to narrow existing property frontages, the access point spacing shall be as close to the required spacing as possible. In these cases, the city engineer may require investigation to substantiate whether or not left turns should be prohibited into or out of the access point. Provisions for joint access may be required -for two adjacent developments where a proposed new access will not meet the spacing requirements of this chapter or to limit the number of access points on collectors or arterials. In 'the event the adjacent property is not ready for development, the first property ready for development may use an interim access. Revised July 2001 Section 6 - Page 3 CITY OF BAINBRIDGE ISLAND DESIGN AND CONSTRUCTION STANDARDS AND SPECIFICATIONS SITE ACCESS 6-06 NUMBER OF ACCESS POINTS The standard number of access points for a development are: 1. Residential property uses - one two -way access point. 2. Commercial or Industrial property uses - one two -way access point or two one -way access points per 500 feet of total property frontage. Additional access points, for residential property uses, may be considered by the city engineer provided a plan is submitted to the city engineer indicating that more than one access point is required to adequately handle specific sit conditions, and will not be detrimental to traffic flow on adjacent roads. Additional access points, for commercial or industrial property uses, may be considered by the city engineer provided a development or circulation plan is submitted to the city engineer indicating that more than the maximum number of access points permitted are required to adequately handle access point volumes, and will not be detrimental to traffic flow on adjacent roads. Commercial or industrial developments located adjacent to two or more roadways may be allowed more than one access point per 500 feet if comer clearances as required in Standard Drawing 6 -020 are met. For large developments, it is often desirable to consolidate access traffic at a single point which can be ignalized. Proposed signalization must meet appropriate warrants in the MUTCD. Access point signals should be coordinated with adjacent traffic signals and located to provide satisfactory signal progression for through traffic. When property frontages are narrow, such that minimum access point spacing criteria cannot be met, it may be necessary to require joint access locations at property lines. The requirements of this section are not intended to override the need for a secondary access for emergency vehicles if such access has been determined by the Fire Marshal to be necessary under the provisions of Section 10.207 of the Uniform Fire Code, 6-07 ACCESS POINT TYPES, RADII AND WIDTHS See Standard Drawings 6 -030, 8 -120, 8 -130, 8 -140 through 8 -170 A. DRIVEWAYS Revised July 2001 _ Section 6 - Page 4 CITY OF BAINBRIDGE ISLAND DESIGN AND CONSTRUCTION STANDARDS AND SPECIFICATIONS SITE ACCESS 1 In areas requiring cement concrete curb and gutter, new private property access points will require 1 the installation of Drop Curb Driveways as shown on Standard Drawings 8 -120, 8 -130, and 8 -140. B. RADIUS- RETURNS Radius - retums will be required for access points when specified in Standard Drawing 6 -030, Access Point Types, Radii and Widths, and whenever islands are constructed in the access point to control turning movements. C. ASPHALT OR CEMENT CONCRETE APPROACHES In areas where curbing is not a requirement, asphalt or cement concrete approaches shall be used as shown in Standard Drawings 8 -150 through 8 -180. D. NOTES - STANDARD DRAWING 6 -030 For access points with an anticipated usage of less than 2000 VPD (Vehicles Per Day), drop curb driveways (Standard Drawings 8 -120, 8 -130 or 8 -140) for curbed areas or asphalt or concrete approaches (Standard Drawings 8 -150 through 8 -180) for shouldered areas must be used. 2. Street intersections must utilize radius - returns if the daily traffic volume is 2000 VPD or greater. Larger access point radii (typically between 40 and 50 feet but possibly as much as 70 feet) may be required for access points when multi -unit vehicles or single unit vehicles exceeding 30 feet in length comprise 10% or greater of the traffic expected to use the access point. In designing these larger vehicle access points, methodology as contained in the WSDOT Design Manual, Chapter 920, Road Approaches, particularly Figure 920 -2b, entitled Commercial Approach - Single Approach Type D will be used as a guide, keeping in mind the following: a. If a commercial or industrial access point is going to have significant number of both trucks and passenger cars, then consideration shall be given to separating trucks from passenger cars. This would entail separating both access points and site circulation. b. Vehicles should be able to utilize radius -return access points without encroaching on adjacent lanes of traffic. Revised July 2001 Section 6 - Page 5 CITY OF BAINBRIDGE ISLAND DESIGN AND CONSTRUCTION STANDARDS AND SPECIFICATIONS SITE ACCESS E. WIDTHS The maximum two -way access point width shall be 30 feet for residential property uses (single family or duplex) and 40 feet for commercial property uses, except, the maximum two-way access point width for industrial property uses may be 50 feet. Wider commercial or industrial widths may be approved by the city engineer where a substantial percentage of oversized vehicles traffic exists. In this case, the access should be sized to accommodate the largest design vehicle likely to use the access with considerable frequency. 2. Residential access points shall have a minimum width of 10 feet. Commercial or Industrial access points shall have a minimum width of 25 feet fronting a non - arterial, and 30 feet fronting an arterial. 3. One -way access point widths for commercial or industrial access points may range from 20 to 22 feet. 6-08 HORIZONTAL ALIGNMENT OF ACCESS POINTS All access points shall be angled a minimum of 75 degrees to the street, 90 degrees preferred, unless designated right turn only in which case the angle must be at least 45 degrees and then only with the city igineer's approval. EXCEPTION: Access points designed for large vehicles shall be angled a minimum of 85 degrees to the street. 6-09 VERTICAL ALIGNMENT OF ACCESS POINTS See Standard Drawing 6 -040. Back edges of access points shall be at the same elevation as the back of the sidewalk adjacent to the access point approach. EXCEPTION: The city engineer may allow a deviation from this requirement for a reverse slope driveway situation if the applicant/developer can demonstrate such a deviation will allow a safe sight distance to be maintained. Approach grades and configuration shall accommodate future street widening to prevent major access point reconstruction. For maximum access grades, see Standard Drawing 6 -040, Access Point Grades. revised July 2001 Section 6 - Page 6 CITY OF BAINBRIDGE ISLAND DESIGN AND CONSTRUCTION STANDARDS AND SPECIFICATIONS SITE ACCESS 6-10 LEFT TURN, ACCELERATION, DECELERATION LANES The need for left turn, acceleration and deceleration lanes in conjunction with development proposals will be determined by the city engineer on a case -by -case basis. Evaluation by the city engineer may require submittal of traffic data by the applicant/developer, 6-11 MEDIANS The necessity for median treatment in conjunction with development proposals will be determined by the city engineer on a case -by -case basis. 6-12 TRANSIT STOPS See Standard Drawing 6 -050. Generally, bus pullouts will be specified if (1) traffic and passenger boarding and debarking conditions warrant; (2) traffic flow would be greatly hindered due to in lane stopping;' or (3) the posted speed limit is in excess of 35 mph. A. LOCATIONS FOR BUS PULLOUTS Placement of Bus Pullouts on the far side of signalized intersections immediately following the intersection is preferred. When no signalized intersection exists, the pullout should be placed on the far side of the intersection. Sight distance shall be determined by consulting Table 7.1 for'all roads. Distance between pullouts should not be greater than 1000 feet. 2. If far side pullouts are not possible, near side pullouts will be evaluated. Mid -block pullouts are generally discouraged. Bus pullouts should be constructed on both sides of a two -way street in a complementary pair if possible. 4, Maintaining adequate separation between access point/intersections and bus pullouts can increase the safety and efficiency of both the roadway and the transit service. Revisod July 2001 Section 6 - Page 7 CITY OF BAIMRIDGE ISLAND DESIGN AND CONSTRUCTION STANDARDS AND SPECIFICATIONS SITE ACCESS 5. When locating a bus pullout in reference to existing access points or an access point in reference to an existing bus pullout, the following guidelines need to be taken into consideration; a. A minimum distance of 105 feet, 125. feet preferred, should be maintained between the pullout and the access point on arterial roadways and a minimum of 55 feet, 75 feet preferred, on non - arterial roads. This distance is measured from the edge of the access point to the front or back of the transit vehicle, whichever end is closer. b. Driveways within the limits of a bus pullout are discouraged. Any exception to this requirement will require approval by the city engineer. B. DESIGN OF BUS PULLOUTS Bus pullouts should be designed as depicted in Standard Drawing 6-050. All pullout designs must follow applicable guidelines for facilities used by the handicapped (Americans With Disabilities Act). The Community Transit Systems Planning Office should be contacted for specific design questions. C. OTHER DESIGN REFERENCES Chapter 1060, entitled Transit Benefit Facilities, WSDOT Design Manual. Revised July 2001 Section 6 - Page g CITY OF BAINBRIDGE ISLAND DESIGN AND CONSTRUCTION STANDARDS AND SPECIFICATIONS SECTION 8 - ROAD ELEMENTS AND ROADSIDE FEATURES TABLE OF CONTENTS SECTION PAGE 8 -01 STREETENDS .............................................................................................................................. ..............................1 8 -02 MEDIANS ............................................. ... ... .:..... ............ . ... - .... .....,...,.,.............. .,..............,...................... .., .... . ...... ...1 8-03 SURVEYMONUMENTS AND CORNERS ................................................................................... ..............................2 8 -04 CURB DETAILS .....................................................................................................,...................... ................,.............3 8 - 05 CONCRETE SIDEWALKS ......... ............................................................................................. .....................I......... 3 A. FOR URBAN AREAS .................................................................................................................... ............................... 3 B. CURB RAMPS (WHEELCHAIR RAMPS) .....:................................................................................ ..............................4 C. WIDTH .................................................................. ............................... ....................................... ..............................4 D. THICKNESS ................................................................................................................................... ............................... 4 8 - 06 ASPHALT WALKWAYS ............................................................................................................ ............................... 4 8 - 07 MULTI -USE TRAIL ..................................................................................................................... ............................... 4 8-08 SPECIAL ACCESS EASEMENTS .................................... ............................... .......................... ............................... 5 8 -09 BIKEWAYS ORBIKE LANES ...................................................................................................... ..............................5 8 -10 DRIVEWAYS 8 -11 SURFACING REQUIREMENTS .................................................................................................. ..............................6 8 -12 GUARDRAIL ................................................................................................................................ ..............................7 8 -13 BOLLARDS .......................................................... ............................... .....,.....,,.,...7 8-14 ROADWAY BARRICADES ...................................................... ............................... -- ..............................8 8 -15 STREET ILLUMINATION ............................................................................................................ ..............................9 A. STREET LIGHT CONSTRUCTION ................... ... ...... ......... ... ............... .. ....... ........................ . ................ I......— ........... 9 8 -16 MAIL. BOXES .................................................................................................... .............................11 A. CITY ENGINEER RESPONSIBILITY ........................................................................................... .............................11 B. LOCAL POSTMASTER RESPONSIBILITY .................................................................................. .............................11 C. OWNER OR RESIDENT RESPONSIBILITY ................................................................................ .............................12 D. DEVELOPER /CONTRACTOR RESPONSIBILITY ....................................................................... .............................12 E. INSTALLATION METHODS ......................................................................................................... .............................12 8 -17 SIDE SLOPES .............................................................................................................................. .............................13 8 -18 STREET TREES AND LANDSCAPING .................. . ......... .. ........ . ......... .. ............ — ............................. ........ ......,...,..13 Revise July 2002 CITY OF BAINBRIDGE ISLAND DESIGN AND CONSTRUCTION STANDARDS AND SPECIFICATIONS SECTION 8 - ROAD ELEMENTS AND ROADSIDE FEATURES } TABLE OF CONTENTS 8-19 ROADSIDE OBSTACLES,........... ............................................................................................... ............................,13 8 - 20 SAFETY RAILS ........................................................................................................................... .............................14 8.21 ROCK WALLS ( ROCKERIES) ..................................................................................................... .............................14 A, MATERIALS .................................................................................................................................. .............................14 B. ROCKERY CONSTRUCTION ....................................................................................................... .............................15 8 - 22 TRAFFIC CONTROL SIGNS ..... ............................................................ .............................6, ..... .............................17 8 - 23 STREET DESIGNATION SIGNING ............................................................................................. .............................18 A. DESCRIPTION ................................. ............................... .......................................................... .............................18 B. MATERIALS ............................................................................... ............................... ........... .............................18 . .. ..... .. C. CONSTRUCTION REQUIREMENTS ............................................................................................ .............................19 Revised July 2002 CITY OF BAINBRIDGE ISLAND DESIGN AND CONSTRUCTION STANDARDS AND SPECIFICATIONS ROAD ELEMENTS AND ROADSIDE FEATURES SECTION 8 ROAD ELEMENTS AND ROADSIDE FEATURES 9-01 STREET ENDS See Standard Drawing 8 -010. Permanent street ends of 150 feet or less in length (measured from the edge of traveled way of the intersecting street to the end of the street) will not require a circular turnaround or hammerhead, Permanent street ends between 150 and 1000 feet (measured from the edge of traveled way of the intersecting street to the beginning of cul -de -sac) shall be provided with a circular turnaround or hammerhead as shown on Standard Drawing 8 -010. Temporary street ends may use a hammerhead design in lieu of a cul -de -sac. Permanent street ends in excess of 1000 feet are discouraged but will be considered for cases where lots are large and/or difficult terrain exists, provided, the number of single family lots served by the street does not exceed 25 or the Average Daily Trip (ADT) generated from the properties served by the street does not exceed 250. } The maximum grade in any street end within the cul -de -sac turnaround shall be 6 percent in any direction. The city engineer will require off -street walkways to connect a street end at its terminus with other streets, parks, schools, bus stops, or other pedestrian traffic generators, if a demonstrated need exists. The City engineer may also require street ends be designed for future emergency vehicle access where connection to an existing street or future street is feasible. See Standard Drawing 8 -010, Street Ends, for layout. 8-02 MEDIANS Where required for traffic control or landscape planters, medians shall be in addition to, not part of, the specified roadway width. Roadway on each side of median shall be not less than one half of the roadway width. Medians shall be designed so as not to limit turning radii or sight distance at intersections. Median curb edges shall be as specified in Section 8 -04, or shoulder and ditch; except where median shoulders are provided in lieu of curb, they shall be a minimum 4 feet in width. Medians may be grassed, landscaped, or, surfaced with aggregate or pavement. Revised July 2002 Section 8 -Page 1 CITY OF BAINBRIDGE ISLAND DESIGN AND CONSTRUCTION STANDARDS AND SPECIFICATIONS ROAD ELEMENTS AND ROADSIDE FEATURES 8-03 SURVEY MONUMENTS AND CORNERS See Standard Drawings 8 -020, 8 -030, 8 -035. All existing survey control monuments on or proximate to a construction site shall be referenced and tied to a minimum of three (3) off-site structures or monuments. All existing survey control monuments which are disturbed, lost, or destroyed during surveying or building shall be replaced, at the expense of the responsible builder or developer, by a Professional Land Surveyor registered in the State of Washington. Such replacement shall be documented and certified by the responsible Professional Land Surveyor. Where specified in these standards, survey monuments shall be located in accordance with Standard Drawings M20 or 8-030 as appropriate in all subdivision and short plats where required. Boundaries of final plats and short plats shall be established with markers described below except that boundary comers that consist of section or quarter section corners shall be established in accordance with Standard Drawing 8 -020. In the case where a property corner is occupied by a fence post or other obstruction, an offset marker shall be provided along one of the boundary lines. Offset monuments shall only be set to witness section and quarter section corners. Markers shall meet the following standards: Standard steel reinforcing bars shall be at least 24 inches in length and at least '/z -inch in diameter or at least .75 inches inside diameter for iron pipe. Such pipe or rebar shall be permanently tagged with the Land Surveyor's registration number. Intersection points of a plat boundary with the centerline of a City road right -of -way centerline shall be monumented in accordance with Standard Drawing 8 -020. Monument, case, and cover shall be set in accordance with Standard Drawing 8 -020 for all PC, PT, center of circular turnaround and intersection points. The point of intersection (PI) will be acceptable in lieu of a PC and PT for plat road curves, provided that such PI falls within the right -of -way. Monument cases and covers shall be properly raised when road surface is raised due to paving. All new monument cases shall be referenced and tied prior to paving, and location verified by a Washington Professional Land Surveyor after paving. Revised July 2002 Section 8 - Page 2 CITY OF BAINBRIDGE ISLAND DESIGN AND CONSTRUCTION STANDARDS AND SPECIFICATIONS ROAD ELEMENTS AND ROADSIDE FEATURES 8-04 CURB DETAILS See Standard Drawings 8 -040, 8 -050, Vertical Curb and Otter 18 inches wide or curb alone 6 inches wide and 12 inches high (see Standard Detail 8 -040) shall be used for all curbed roadways except as modified below: Thickened asphalt edge, 12 inches wide, will be preferred for rural streets. Extruded Cement Concrete Curb (see Standard Drawing 8 -050) may be used for parking areas which will not become part of the city road system. 8-05 CONCRETE SIDEWALKS See Standard Drawings 8 -060, 8 -070, 8 -090, 8 -100. A. FOR URBAN AREAS Concrete sidewalks shall be provided as indicated in the City's Comprehensive Plan. This location is to be determined on a case -by- case - basis, subject to approval by the city engineer, to facilitate public transportation use and be consistent with the Comprehensive Plan. Permanent street ends, ultimately serving 8 or less residential lots (80 ADT or less) will not require sidewalks on either side. Paragraphs 1 and 2 may be waived or modified by the city engineer in the following cases; On existing streets where it would be unduly difficult or impractical to construct a sidewalk due to grade and/or construction problems. 2. In subdivisions where the proposed design provides for a comprehensive 'internal walkway system outside of public right -of -way. The concrete sidewalk requirements specified above may be waived in favor of asphalt walkways by the city engineer when conditions dictate a flexible pavement design. The width of asphalt walkways when constructed behind a curb and gutter section shall conform to those for concrete sidewalks. Revised July 2002 Section 8 - Page 3 CITY OF BAINBRIDGE ISLAND DESIGN AND CONSTRUCTION STANDARDS AND SPECIFICATIONS ROAD ELEMENTS AND ROADSIDE FEATURES B, CURB RAMPS (WHEELCHAIR RAMPS) Curb ramps shall be provided at all pedestrian crossings having vertical curb sections. One ramp shall be used on each curb return on residential streets and unsignalized intersections. At signalized intersections, a curb ramp shall be aligned with each crosswalk. Curb ramps shall also be provided to enable passage across radius return access points. See Standard Drawings 8 -060, 8 -070, and 8 -080. C. WIDTH Sidewalks fronting residential property uses shall be constructed of Portland Cement Concrete, 5 foot minimum width. 2. Sidewalk fronting commercial or industrial property uses shall be constructed of Portland Cement Concrete, 7 feet minimum (excluding curb) width. Width of sidewalk is measured from the back of the curb to the back of the sidewalk when the sidewalk is adjacent to the curb. 4. Meandering sidewalks shall maintain the full design width around obstructions that cannot be relocated. Additional right -of -way (or easement) may be required to either relocate the obstruction or meander the sidewalk. 5. At bus stops, a landing pad at least 10 feet deep and 15 feet wide shall be provided for wheelchair operations, D, THICKNESS Concrete sidewalks shall be 4 inches thick when placed behind vertical curb, 5 inches thick when placed behind rolled curb, and 6 to 8 inches thick at dropped curb driveways (see Standard Drawings 8 -120, 8- 130, 8 -140). 8-06 ASPHALT WALKWAYS Surfacing details for shoulder and off - shoulder asphalt walkways are specified in Section 841. See Standard Drawing 8 -110, 8-07 MULTI -USE TRAIL Multi -use trails may be used as a substitute for Portland Cement Concrete sidewalks or asphalt walkways in rural areas for equestrian usage or as determined by the city engineer. Devised July 002 Y Section 8 -Page 4 CITY OF BAINBRIDGE ISLAND DESIGN AND CONSTRUCTION STANDARDS AND SPECIFICATIONS ROAD ELEMENTS AND ROADSIDE FEATURES Multi -use trails shall be a minimum of 6 feet wide. Access easements shall comply with Section 8-08. } Surfacing materials shall be as specified in Section 8 -11. Multi -use trails shall be a minimum of 4 feet from the edge of the vehicular traveled way unless no practical alternative exists and when approved by the city engineer. Access easement terminations shall be installed as required by the city engineer. 8-08 SPECIAL ACCESS EASEMENTS Where it is necessary to facilitate pedestrian circulation between neighborhoods, schools, shopping areas, transit facilities, or other activity centers, the city engineer may require the dedication of a public access easement or tract. Pedestrian access easements or tracts shall be a minimum of 5 feet wide. Improvements to the easement shall include a sidewalk, walkway, or trail consistent with other non- motorized facilities in the area. Fences. shall be constructed along access easements in residential areas where buildings will be located nearer than 25 feet to the edge of the easement. Diverters or bollards shall be installed when required by the city engineer. 8-09 BIKEWAYS OR BUM LANES Bikeways or bike lanes locations will be consistent to the City's Comprehensive Plan. Widths vary according to AASHTO Standards for Class I, II, and III Bikeways, 1 8-10 DRIVEWAYS See Standard Drawings 8 -120, 8 -130, 8 -140, 8 -150, 8 -160, 8 -170, 8 -175 and 8 -180. For residential property uses utilizing vertical curbs, access points shall be constructed as shown on Standard Drawing 8 -130, Drop Curb Driveway - Residential with Planter. For commercial or industrial property uses utilizing vertical curbs, access points shall be constructed as shown on Standard Drawing 8 -140, Drop Curb Driveway- Commercial/Industrial. Where no curbing exists along the roadway, an asphalt approach may be used as shown in Standard Drawings 8 -150 and 8 -170. As an alternative, a Portland Cement Concrete approach may be used as shown in Standard Drawings 8 -160 and 8 -180. Driveways are discussed in detail in Section 6, Site Access. Revised July 2002 Section 8 - Page 5 CITY OF BAINBRIDGE ISLAND DESIGN AND CONSTRUCTION STANDARDS AND SPECIFICATIONS 1 ROAD ELEMENTS AND ROADSIDE FEATURES 8-11 SURFACING REQUDIEMENTS All materials and workmanship shall be in accordance with the MOT/AM Spec cations, these standards, and as approved by the city engineer. The following are the minimum requirements for surfacing for specific facilities as described elsewhere in these standards. Facility Surfacing Requirements 1. Arterials Per specific design 2. Non - arterials See Standard Drawings 7 -020, 7 -030, 7 -040, 7 -050, 7 -060, 7 -065 and 7 -066 3. Concrete Sidewalks 4. Asphalt Shoulder 5. Asphalt Walkway 6. Multi -Use Trail 7. Bikeway 8. Bikeway 4" Portland Cement Concrete (adjacent to vertical curb) 5" Portland Cement Concrete (adjacent to rolled curb) 6" or 8" Portland Cement Concrete (adjacent to dropped curb) Same as l or 2 above (road shoulder) 2" Class B ACP (Modified) (off shoulder) over 2" CSTC 4" of 3 /a" minus crushed rock or cinders Same as I or 2 (road shoulder) 2" Class B ACP over (off -road) 2" CSTC Arterial road/streets shall be designed with a structural section that takes into account the load bearing capacity of the soils and the traffic carrying requirements of the roadway. Plans shall be accompanied by the soils and traffic analysis on which the design is based. Shoulders shall be constructed to the same structural section as the roadway. Pavement designs submitted to the City shall be based on a design life of 20 years with a growth factor of 2 %. All minimum surfacing requirements assume an acceptable, well drained, stable, compacted subgrade. Additional measures may be required at the city engineer's discretion if evidence exists of unstable subgrade. Crushed surfacing top course (CSTC) may be substituted for ATB in the ratio of 2.0 inches of CSTC per inch of A'1B (compacted depths) where it can be demonstrated to the city engineer's satisfaction that it can be placed without contamination of any surfacing materials. Revised July 2002 Section 8 - Page 6 CITY OF BAINBRIDGE ISLAND DESIGN AND CONSTRUCTION STANDARDS AND SPECIFICATIONS ROAD ELEMENTS AND ROADSIDEYEATURES Pavement markings when required by the Engineer shall be hot applied or cold applied thermoplastics, reflectorized, in accordance with Section 8 -22 of the WSDOT/APWA Specifications. Painted markings may be used when approved by the Engineer. Modified Class B ACP for Off-Shoulder Walkway. ACP Class B shall be modified by elimination of the coarse aggregate; i.e., substitute the 3/8" screen for the 5/8" screen. The gradation requirements for gravel borrow as specified in WSDOT /APWA Specifications, Section 9- 03.13, is superseded by the following; * The largest aggregate shall be no larger than one -half the total depth of the gravel borrow course. If requested by the contractor, the screen size may be increased with the Engineer's approval if the larger size aggregate will be necessary. ' B-12 GUARDRAIL Evaluation of embankments for guardrail installations shall be in accordance with Chapter 710 of the WSW T Design Manual or the AASHTO Roadside Design Guide. Guardrail installations shall conform to WSDOT /APWA Plan C -1, Beam Guardrail Type 1. End anchors shall conform to WSDOT /APWA Plan C-6, Beam Guardrail Anchor Type 1, 8 -13 BOLLARDS See Standard Drawing 8 -190. A. When necessary to deny motor vehicle access to an easement, tract, or trail, the point of access shall be closed by two bollards supporting a cable or chain and a road closed barricade sign. Signs shall be similar to a Type I barricade as shown in Standard Drawing 8 -200, Bollards shall be 12 feet apart. Revised July 2002 Section 8 - Page 7 CITY OF BAINBRIDGE ISLAND DESIGN AND CONSTRUCTION STANDARDS AND SPECIFICATIONS GRAVEL BORROW % Passing 1 -1 /4" square opening 100* % Passing ' /a" square opening 25-75 % Passing US No. 40 sieve 0-25 % Passing US No. 100 sieve 0 - 5 % Passing Sand Equivalent 50 min. All percentages by weight Sand Equivalent 50 min. * The largest aggregate shall be no larger than one -half the total depth of the gravel borrow course. If requested by the contractor, the screen size may be increased with the Engineer's approval if the larger size aggregate will be necessary. ' B-12 GUARDRAIL Evaluation of embankments for guardrail installations shall be in accordance with Chapter 710 of the WSW T Design Manual or the AASHTO Roadside Design Guide. Guardrail installations shall conform to WSDOT /APWA Plan C -1, Beam Guardrail Type 1. End anchors shall conform to WSDOT /APWA Plan C-6, Beam Guardrail Anchor Type 1, 8 -13 BOLLARDS See Standard Drawing 8 -190. A. When necessary to deny motor vehicle access to an easement, tract, or trail, the point of access shall be closed by two bollards supporting a cable or chain and a road closed barricade sign. Signs shall be similar to a Type I barricade as shown in Standard Drawing 8 -200, Bollards shall be 12 feet apart. Revised July 2002 Section 8 - Page 7 CITY OF BAINBRIDGE ISLAND DESIGN AND CONSTRUCTION STANDARDS AND SPECIFICATIONS ROAD ELEMENTS AND ROADSIDE FEATURES B. Bollard design shall be in accordance with. Standard Drawings 8 -190 or other design acceptable to the city engineer. No fire apparatus access roads shall be blocked in this manner without the concurrence of the city fire marshal. 8-14 ROADWAY BARRICADES See Standard Drawings 8 -190, 8 -200, 8 -210. Temporary and permanent barricades shall conform to the MUTCD and these standards. Type I or Type II barricades are intended for use in situations where traffic is maintained through the construction area. They may be used singly or in groups to mark a specific hazard or they may be used in a series for channelizing traffic. On construction projects when a road section is closed to traffic, Type III barricades shall be erected at the points of closure. Type III barricades shall extend completely across a roadway and its shoulders (as a fence) or from curb to curb. Where provision must be made for access of equipment and authorized vehicles, the Type III barricades shall be provided with movable sections that can be closed when work is not in progress, or with indirect openings that will discourage public entry. Where job site access is provided through the Type III barricades, the developer /contractor shall assure proper closure at the end of each working day. In the general case, Type III permanent barricades shall be installed to close arterial roadways or other through streets hazardous to traffic. They shall also be used off lanes where tapers are not sufficiently delineated. Signs may be erected on barricades, particularly those of the fixed type. The ROAD CLOSED and Detour Arrow signs, and the Large Arrow warning signs may be mounted effectively on or above the barricade that closes the roadway. For night time use, it is desirable to add flashing warning lights when barricades are used singly and steady -burn lights when barricades are used in a series for channelization. Revised Jaly 2002 Section 8 - Page 8 CITY OF BAINBRIDGE ISLAND DESIGN AND CONSTRUCTION STANDARDS AND SPECIFICATIONS ROAD ELEMENTS AND ROADSIDE FEATURES 8-15 STREET ILLUMINATION See Standard Drawing 8 -350, ,Luminaires of suitable type and candlepower shall be provided where directed by the city engineer on arterials and as intersection identifiers where other streets intersect arterials. Type of installation shall be as per WSDOT/APWA Specifications and as required by the city engineer, No installation will be permitted within a sidewalk unless the unobstructed sidewalk width is equal to or greater than the minimum required for that sidewalk. A. STREET LIGHT CONSTRUCTION All workmanship, materials, and testing shall be in accordance with WSDOT /APWA, MUTCD, NEC, or City of Bainbridge Island development guidelines unless otherwise specified below. In cases of conflict the most stringent guideline shall apply. Electrical permits and inspections are required for all street lighting installations. The contractor is responsible for obtaining said permits prior to any type of actual construction, These permits are available from the Department of Labor and Industry in Bremerton. A clearly marked service disconnect shall be provided for every lighting circuit, The location and installation of the disconnect shall conform to National Electrical Code (NEC) and City standards. The service disconnect shall not be mounted on the luminaire pole. The service disconnect shall be of a type equal to a Meyers MEUGL- M100C -UM or Unicom CP11113- 01113A service, 120 -240 VAC, 103W, Caltrans Type 3B with oontactors, photo electric cell and test switch. All service disconnects shall be used to their fullest capabilities, i.e., maximum number of luminaires per circuit. All lighting wire shall be copper with a minimum size of 48. All wire shall be suitable for wet locations, All wire shall be installed in schedule 40 PVC conduit with a minimum diameter of 1-1/4 inches. A bushing or bell-end shall be used at the end of a conduit that terminates at a junction box or luminaire pole. Conductor identification shall be an integral part of the insulation of the conductors throughout the system, i.e., color coded wire. Equipment grounding conductor shall be #8 copper. All splices or taps shall be made by approved methods utilizing epoxy kits rated at 600 volts (i.e., 3 -M 82 -A2). All splices shall be made with pressure type connectors (wire nuts will not be allowed). Direct burial wire will not be allowed. All other installation shall conform to NEC, WSDOT /APWA, and MUTCD standards. i Revised July 2002 Section 8 - Page 9 CITY OF BAINBRIDGE ISLAND DESIGN AND CONSTRUCTION STANDARDS AND SPECIFICATIONS ROAD ELEMENTS AND ROADSIDE FEATURES Each luminaire pole shall have an in -line, fused, water tight electrical disconnect located at the base of the pole. Access to these fused disconnects shall be through the hand -hole on the pole. The hand -hole shall be facing away from on- coming traffic. Additional conductor length shall be left inside the pole and pull or junction box equal to a loop having a diameter of one foot. Load side of in -line fuse to luminaire head shall be cable and pole bracket wire, 2 conductor, 19 strand copper #10 and shall be supported at the.end of the luminaire arm by an approved means. Fuse size, disconnect installation, and grounding in pole shall conform to NEC standards. Approved pull boxes or junction boxes shall be installed when conduit runs are more than 200 feet.' In addition, a pull box or junction box shall be located within 10 feet of each luminaire pole and at every road crossing. Boxes shall be clearly and indelibly marked as lighting boxes by the legend, "L.T." or "LIGHTING ". See WSDOT Standard Plan J -1 la. All lighting poles shall have tapered round shafts with a linear taper of between 0.125 and 0.14 inches per foot. All poles shall be Hapco 50700 -005 or 50700 -006 for single arm and Hapco 50701 -010 for twin arm or approved equal. In existing developed areas, the City may approve /require use of other poles to establish consistency within the developed area. Mounting heights, arm length, power source, luminaire, and wattage shall be as follows: Mounting Height: 40 feet Curb Overhang: 4 feet Power Source: 240 VAC, Single Phase, 3 wire Luminaire Type: High Pressure Sodium Flat Lens Medium Cutoff I.E.S. Type 3 Distribution Wattage: 200 Watt, Residential Street Intersection I50 Watt, Residential Street 400 Watt, Collector Portland Cement Concrete bases shall follow WSDOT Standard Plan J -1b, Sheet 1, Foundation Detail, Conduit shall extend between 3 and 6 inches above the concrete base. Any modification to approved plans shall be reviewed and approved by the city engineer prior to installation. ? Revised July 2002 Section 8 - Page 10 CITY OF BAINBRIDGE ISLAND DESIGN AND CONSTRUCTION STANDARDS AND SPECIFICATIONS ROAD ELEMENTS AND ROADSIDE FEATURES B-16 MAIL BOXES See Standard Drawings 8 -220, 8 -230, 8 -240. The responsibilities for location and installation of mailboxes in connection with the construction or reconstruction of City roads are as follows: A. CITY ENGINEER RESPONSIBILITY Requires road construction plans, whether for construction by the Department of Public Works or by a private developer, to show clearly the designated location or relocation of mailboxes, whether single or in clusters. 2. Requires with this information any necessary widening or reconfiguration of sidewalks with suitable knock -outs or open strips for mailbox posts or pedestals. The city engineer may require special turnouts for mail delivery vehicles for roads classified as arterials or neighborhood collectors. Requires Mailbox Turnouts, for 3 or more mailboxes, in accordance with Standard Drawing 8 -250, along all streets, except where such street is posted at 25 mph or less. 4. Requires these plans to bear a statement on the first sheet that mailbox locations as shown on these plans have been coordinated with the local postmaster. This will be a prerequisite to plan approval. S. Requires construction of mailbox locations in accordance with these plans, subject to inspection and enforcement procedures. B. LOCAL POSTMASTER RESPONSIBILITY Designates location and manner of grouping of mailboxes. Note on the plans the type of mailbox delivery: Neighborhood Delivery and Collection Box Unit (NDCBU), Wood Structure Cluster or individual type box. Authenticate by stamp or signature when this data has been correctly incorporated into the plans. Z Does all necessary coordination with owners or residents involved to secure agreement as to mailbox location, in accordance with these standards, and to instruct them regarding mailbox installation. Actual installation or relocation of NDCBUs is the responsibility of the developer or homeowners association. Revised July 2002 Section 8 - Page 11 CITY OF BAINBRIDGE ISLAND DESIGN AND CONSTRUCTION STANDARDS AND SPECIFICATIONS ROAD ELEMENTS AND ROADSIDE FEATURES C. OWNER OR RESIDENT RESPONSIBILITY The owners or residents served by mailboxes, at time of original installation, will: 1. If using individual mailboxes, clustered or separated, install and thereafter maintain their own mailboxes as instructed by the U.S. Postal Service, 2. If NDCBU delivery, rely on U.S. Postal Service to provide and maintain NDCBUs. D. DEVELOPER/CONTRACTOR RESPONSIBILITY Existing mailboxes and no plans to replace them with NDCBUs: If it is necessary to remove or otherwise disturb existing mailboxes within the limits of any project, the developer /contractor shall install the boxes temporarily in a position that their function will not be impaired. After construction has been completed, the developer /contractor shall reinstall boxes at locations in accordance with these Standards or as approved by the city engineer and use only existing posts or materials except where in conflict with these Standards. Any damage caused by the builder or his contractor is to be repaired at the expense of the Developer. ! Existing NDCBUs or plans to install NDCBUs: The developer /contractor shall call the City of Bainbridge Island Postmaster to approve the location of the NDCBU and make the necessary location, Install the NDCBU as approved by the Postmaster. E. INSTALLATION METHODS Installation methods are as follows: Single or double mailbox installations shall be set in accordance with Standard Drawing 8 -220, 2. In more urbanized areas, boxes shall be clustered together when practical and when reasonably convenient to the houses served in accordance with Standard Drawings 8 -820, 8 -230, 8 -240 and 8 -250. 3. NDCBUs (Standard Drawing 8 -240) will be installed by the U.S. Postal Service, 4, When mailboxes are located in the sidewalk, individually or in clusters, sidewalks shall be widened to provide a minimum of 6 feet of clearance around the mailboxes. Revised July 2002 Section 8 -Page 12 CITY OF BAINBRIDGE ISLAND DESIGN AND CONSTRUCTION STANDARDS AND SPECIFICATIONS ROAD ELEMENTS AND ROADSIDE FEATURES B-17 SIDE SLOPES A. Side slopes shall generally be constructed no steeper than 3 to '1 for fill slopes and 2 to 1 for cut slopes. Steeper slopes may be approved by the city engineer upon showing that the steeper slopes, based on geotechnical analyses, will be stable. Slopes shall not exceed 2 to 1 for fill slopes and 1 to 1 for cut slopes. B. Side slopes shall be stabilized by grass sod or seeding or by other planting or surfacing materials acceptable to the city engineer, 8-18 STREET TREES AND LANDSCAPING (RESERVED) 8-19 ROADSIDE OBSTACLES A. WSDOT Clear Zone distances shall be used as a guide for evaluation and placement of old, and placement of new, roadside features within the public right -of -way. For posted speeds greater than 35 mph, clear zone distances are contained within Chapter 710, Traffic Barriers, of the WSDOT Design Manual. The same distances are also included in Appendix 1, entitled "Control Zone Guidelines - Utilities" of the WSDOT Utility Manual. B. In general, existing or new roadside features which could present a hazard to the public should be placed outside of clear zone areas unless justified tQ the city engineer's satisfaction by suitable engineering studies considering traffic safety, or, where shielded by a barrier, placed in an area normally inaccessible to vehicles or utilize a breakaway design. EXCEPTION: Clustered Mailboxes or NDCBU Mailboxes in accordance with Standard Drawings 8 -220, 8 -230, and 8- 240 placed along streets posted at 25 mph or less. C. Locations of poles shall be compatible with driveways, intersections, and other roadway features (i.e., they shall not interfere with sight distance, roadway signing, traffic signals, culverts, etc.). To the greatest extent possible, installation of poles and other above ground appurtenances will not be permitted in sidewalks or walkways. D. Costs of relocating poles or obstacles to achieve these standards are the responsibility of the developer whose project necessitates compliance with these standards. This is not intended to prevent the developer from making financial arrangements with an appropriate utility or other owner of the obstacle to accomplish removal of the pole or obstacle. Revised July 2002 Section 8 - Page 13 CITY OF BAINBRIDGE ISLAND DESIGN AND CONSTRUCTION STANDARDS AND SPECIFICATIONS ROAD ELEMENTS AND ROADSIDE FEATURES 8-20 SAFETY RAILS See Standard Drawing 8 -260, 8 -270, and 8 -280, Wooden railings may be used when approved by the city engineer. Wooden railings shall be sturdily constructed of pressure treated timbers and hot dipped galvanized carriage bolts (no nails allowed), Posts shall be minimum 4 x 4 on four (4) foot centers. Three (3) 3 x 6 rails shall be bolted to the posts. Alternate designs may be considered. 8-21 ROCK WALLS (ROCKERIES) See Standard Drawings 8 -290, 8 -300, and 8 -310. To provide a competent and adequate rockery structure, rock walls intended for cut sections over 8 feet in height and fill sections over 4 feet in height shall require design by a geotechnical engineer or other professional engineer qualified in rock wall design. Construction of such rockeries shall be constructed in accordance with these standards and the geotechnical engineer's supplemental recommendations. A geotechnical engineer shall be retained to monitor rockery construction and to verify, in writing, that the rockery was constructed in general accordance with these standards and with his/her supplemental recommendations, in a professional manner and of competent and suitable materials. Where rockeries cannot be constructed without significant foundation settlement or outward thrust upon the rockery, a structural wall of acceptable design such as a reinforced concrete retaining wall shall be provided. Such structural wall shall be designed by a professional engineer qualified in retaining wall design. A. MATERLkLS Rock density shall be greater than one hundred sixty (160) pcf. Rock Size Rock Weight Average Dimenison One Man 50 - 200 pounds 12 - 18 inches Two Man 200 - 700 pounds 18 - 28 inches Three Man 700 - 2000 pounds 28 - 36 inches Four Man 2000 - 4000 pounds 36 - 48 inches Five Man 4000 - 6000 pounds 48 - 54 inches Six Man 6000 - 8000 pounds 54 - 60 inches ! Revised July 2002 Section 8 - Page 14 CITY OF BAINBRIDGE ISLAND DESIGN AND CONSTRUCTION STANDARDS AND SPECIFICATIONS ROAD ELEMENTS AND ROADSIDE FEATURES In rockeries over eight feet in height, it shall not be possible to move the large sized rocks (four } to six man size) with a pry bar. If these rocks can be moved, the rockery should not be considered capable of restraining any significant lateral load. B. ROCKERY CONSTRUCTION Geotechnical Engineer - The geotechnical engineer retained to provide necessary supplemental rockery construction guidelines shall be a practicing geotechnical /civil engineer licensed as a professional civil engineer in the State of Washington who has at least four years of professional employment as a geotechnical engineer in responsible charge, including experience with fill cotstruction and stability and rockery construction. 2. Guarantee or Warranty - The developer /contractor shall furnish to the city engineer any guarantee or warranty furnished as a normal trade practice in connection with the materials used or construction methods employed. Slopes - Slopes above rockeries should be kept as flat as possible, but shall not exceed 2:1 (Horizontal:Vertical) unless the rockery is designed specifically to provide some restraint to the load imposed by the slope. Any slope existing above a completed rockery shall be provided with a vegetative cover to help reduce the potential for surface water flow induced erosion. It shall consist of a deep root, rapid growth vegetative mat and typically will be placed by hydroseeding and covered with a mulch. 4. Monitoring - All rockeries constructed against cuts in excess of eight feet in height and fills in excess of four feet in height shall be periodically monitored during construction by the geotechnical engineer to verify the nature and quality of the materials being used are appropriate, that the construction procedures are appropriate, and that the rockery is being constructed in a generally professional manner and in accordance with these Standards and any supplemental recommendations by the geotechnical engineer. On completion of the rockery, the geotechnical engineer shall submit to the city engineer copies of his /her rockery examination reports along with a final report summarizing rockery construction. Fill Compaction - Where rockeries are constructed in front of a fill, the fill shall be placed and compacted in a manner that will provide a competent fill mass. To achieve this goal, all fills shall consist of relatively clean, organic and debris free granular materials with a maximum size of four inches. Ideally, but particularly if placement and compaction is to take place during the wet season, they shall contain no more than five percent fines (silt and clay size particles passing the number 200 mesh sieve). All fills shall be placed in thin lifts not exceeding ten inches in loose thickness. Each lift shall be compacted to at least 95 percent of the maximum dry density, as determined by ASTM Test Method D- 1557 -78 (Modified Proctor), before any additional fill is placed and compacted. In -place density tests shall be performed at random locations within each lift Revised July 2002 - Section $ -Page 15 CITY OF BAINBRIDGE ISLAND DESIGN AND CONSTRUCTION STANDARDS AND SPECIFICATIONS ROAD ELEMENTS AND ROADSIDE FEATURES of the fill to verify this degree of compaction is being achieved. Walls over 4 feet in height must be designed by a licensed engineer. 6. Fill Construction and Reinforcement a. For rockeries 8 feet in height and less, the fill shall be overbuilt beyond the location of the fill face to be protected. See Standard Drawing 8 -300. b. For rockeries greater than 8 feet in height, the fill shall be reinforced using a geogrid or geotechnical fabric. This form of construction requires a design by the geotechnical engineer for each specific use. The vertical spacing of the reinforcement, the specific type of reinforcement, and the distance to which it must extend back into the fill, and the amount of lapping must be determined on a rockery-by- rockery basis. See Standard Drawing 8 -310. 7. Rockery Keyway - A keyway consisting of a shallow trench of between twelve (12) and eighteen (18) inches in depth shall be constructed the full length of the rockery, and inclined back slightly towards the face being protected. It shall be dug as wide as the rockery (including the width of the rock filter layer). The keyway subgrade shall be firm and to the geotechnical engineer's satisfaction. Keyway and Rockery Drainage - On completion of keyway excavation, a shallow ditch or trench, approximately twelve (12) inches wide and deep, shall be dug along .the rear edge 'of the keyway. A minimum four -inch diameter perforated or slotted drain pipe, or equivalent approved by the engineer, shall be placed in this shallow trench and shall, be bedded on and surrounded by a free - draining rock. This drain pipe shall be installed with sufficient gradient to initiate flow, and shall be connected to a positive and permanent discharge. Positive and permanent drainage shall be considered to mean an existing, or to be installed, storm drain system, a swble, ditch or other form of surface water flow collection system, a detention or retention pond, or other stable native site feature or previously installed collection system. 9. Rockery Thickness - The individual rockery thickness, including the rock filter layer, shall be at least 40 percent Of the rockery height as a guide. The individual rocks shall be arranged in a single course thick, when measured to include the filter layer is equal to the required rockery thickness. 10. Rock Selection - Rock shall be as nearly rectangular as possible. Any rock of basically rounded or tetrahedral form shall be rejected or used for filling large void spaces. The rock material shall be hard, sound, durable, and free from weathered portions, seams, cracks, and other defects. Revised July 2002 Section 8 - Page 16 CITY OF BAINBRIDGE ISLAND DESIGN AND CONSTRUCTION STANDARDS AND SPECIFICATIONS ROAD ELEMENTS AND ROADSIDE FEATURES 11, Rock Placement - The first course of rock shall be placed on firm unyielding soil. There shall be full contact between the rock and soil. The bottom of the first course of rock ,shall be a minimum of twelve (12) inches below the lowest adjacent site grade. Rocks shall be placed so that there are no continuous joint planes in either the vertical or lateral direction. Each rock shall bear on at least two rocks below it, The final course shall have a continuous appearance and be placed at the base of the facing so that it will be stable and have a stable appearance. 12. Face Inclination - The face of the rockery shall be inclined at a gradient of about 1:6 (Horizontal: Vertical) back towards the face being protected. 13. Voids - rock selection and placement shall be such that there will be minimum voids and, in the exposed face, no open voids over six (6) inches across in any direction. After setting each course of rock, all voids between the rocks shall be chinked on the back with quarry rock to eliminate any void sufficient to pass a two -inch square probe, 14. Filter Layer - A drainage filter shall be installed between the rear face of the rockery and the solid face being protected. This filter layer shall be at least twelve (12) inches thick (18 inches for walls greater than 8 feet in height), It shall be composed of two to four inch quarry spalls or other material approved by the geotechnical engineer. The material shall be placed in lifts to an elevation approximately six (6) inches below the top of each course of rocks as they are placed, until the uppermost course is placed. Any such material spilling onto the bearing surface of one rock course shall be removed before setting the next course. 15. Surface Drainage - Surface drainage from above the rockery shall be intercepted and directed away from the rockery to a positive and permanent discharge well below and beyond the toe of the rockery. 8-22 TRAFFIC CONTROL SIGNS The developer is responsible for providing all traffic control signs, Traffic control signing shall comply with the provisions as established by the U.S Department of Transportation on Uniform Traffic Control Devices (MUTCD) most recent edition with two exceptions. Stop signs shall be 30 inches in diameter with high intensity reflectorization sheeting, 2. Mounting height shall be seven (7) feet from the bottom of the sign to the finished grade. 1 Revised July 2002 Section & -Page 17 CITY OF BAINBRIDGE ISLAND DESIGN AND CONSTRUCTION STANDARDS AND SPECIFICATIONS ROAD ELEMENTS AND ROADSIDE FEATURES 1 8-23 STREET DESIGNA'T'ION SIGNING l A. DESCRIPTION This work shall consist of furnishing and installing street designation signing in accordance with the Plans, these Specifications, and the Standard Plans at the locations shown in the Plans or where designated by the Engineer. B. MATERIALS Sign Panels: Signs shall be constructed of extruded aluminum material conforming to ASTM B 209 alloy 6061 -T6 or alloy 5052 -H36 or H38. Vertical dimensions of sign shall be nine (9) inches and extruded aluminum thickness shall be 1/4 inch at the outer edge and taper to 1/8 inch in the center portion of the sign panel. Maximum horizontal dimension of the sign shall not exceed 42 inches. The panel shall have square corners. 2. Reflective Sheeting: Reflective sheeting shall be double -faced reflectorized engineer grade vinyl, color green. The reflective sheeting shall cover the entire sign panel. No borders are to be present. Lettering: Three types of lettering are defined for use on street designation signs. The lettering types are as follows: a. Identification — defines the type of street. Types of streets may include but are not limited to the Road (RD), Drive (DR), Place (PL), Court (CT) and Avenue (AV). b. Section of City — defines the orientatioai of the street within the City of Bainbridge Island roadway system coordinates. Orientation designations include North (N), East (E), South (S), West (W), and all intermediate directions such as Northeast (NE). C. Proper Street Name — unique nomenclature by which the street shall be known and referenced. The Proper Street Name shall be attained by application to the City of Bainbridge Island. The City shall review the application for name redundancy and social appropriateness prior to granting the request. Lettering shall be reflectorized engineer grade vinyl, color white. Lettering shall be six (6) inches in height, capitalized and in Helvetica font. When sign space is limited, Identification and Section of City lettering shall be no less than three (3) inches in height. Standard abbreviations are allowed for Identification and Section of City lettering as illustrated in the proceeding section, items "a" and "b ". Standard abbreviations shall not exceed two (2) letters per abbreviation. Abbreviations shall not be used for Proper Street Revised July 2002 Secdon S - Page 18 CITY OF BAINBRIDGE ISLAND DESIGN AND CONSTRUCTION STANDARDS AND SPECIFICATIONS ROAD ELEMENTS AND ROADSIDE FEATURES Name. A.1 1/2 inch margin shall be maintained around the sign perimeter between the outside edge of the sign and the lettering. Section of City lettering shall be placed either prior to the Proper Street Name or following the Identification in accordance with the City authorized name. 4. Sign Posts: All sign posts shall consist of one solid untreated Western cedar, treated Hem -fir, or treated Douglas Fir timber. Posts shall conform to guidelines for Construction Grade (Light Framing, Section 122 -b West Coast Lumber Inspection Bureau or Section 40.11 Western Wood Products Association). Posts by definition are presumed square and shall have a four (4) inch nominal thickness. Posts shall not be wrapped or encased in any other materials. 5. Mounting Hardware: Lag bolts and flat washers shall be made of galvanized steel. Two (2) of each component is required for sign assembly. Dimensions of lag bolts shall be 2 1/2 inches in length with a 5/16 inch nominal diameter. Flat washers shall have a 5/16 inch designation. Post cap shall be made of cast aluminum that is four (4) inches by four (4) inches. C. CONSTRUCTION REQUIREMENTS Each street sign and mounting post to be erected in the right -of -way (ROW) must meet the following requirement: 1. Application and Issuance of a City of Bainbridge Island ROW permit. 2. No signs are to be placed in a ditchline, bio -swale or other stormwater drainage course. 3. No signs may be placed within two (2) feet of the paved or graveled driving surface. 4. Each mounting posted shall be buried to a minimum depth of two (2) feet. 5. Each sign mounted on a post shall be seven (7) feet from the bottom of the sign to the finish grade. 6. No mounting post shall extend beyond the top of the mounted sign, 7. Mounting posts shall be backfilled with gravel material in accordance with WSDOT Standard Specification 9- 03.9(3) for Crushed Surfacing Base Course. Native material and concrete shall not be used as backfill. Rovised July 2002 Section 8 - Page 19 CITY OF BAINBRIDGE ISLAND DESIGN AND CONSTRUCTION STANDARDS AND SPECIFICATIONS SQUARE KNOB VANE, RESILIENT BEAT GAT£ VAII.W. TAPPING "T" OR FLANGE X FLANGE 0 1 FOR AL1%iUARY LINE- APPRMD BACKFLOgwy PREJENTTER AND WXiu METER. INVENSUS SR -11 TOUCH READ 5/80/+1•. FINISH GRADE FLUSH W/ TOP OF VAULT,' WALL PIPE W /FLANGE (FLxFL ) OW BEND (FLAFL)- -- — 1 3/3" STIMHTT BALL GRIP VALVE W /NP TAPPED INTO BOTTOM OF 9V OFA GROUT GOO GALV. STEEL WALL M CHAMBER LADDER Af Ex UNDER AcCESs SEE STANDARD DETAIL r WAiEi4 j III III ---/ NO SIZE ON 512E TAP GROUT FOR P.V.C. OR A.C. PIPE FOUNDIA11ON GRAVEL ON SUITABLE SUBGRADE s SUPPORT STEEL SCREW JACKS. TYP, 70 FIRE DEPARTMENT SIAMESE PUMPER CONNECTION I RODS {4) TAO OUfSIGL1 OF VAULT, TYP. #' PLAN / — COVERS — SEE TABLE ITEM ---rte .. — ... . -Trr.-T 7.;'.„ ..rfY .� ..ern S�I�p..r,• tr: `.... �},E'VATIOAI�. SWING TYPE ORAVW OPERATED CHECK VALVE (fLYFL) SECTION DAP (FUEL) YD' BEND (FLxFL) POST INDICATOR VALVE _ AS NEAUIRED BY FIRE DEP . DRAIN TO DAYLIGHT 2X SLOPE B' MIN. SCHEDULE 40 .P.V.C. OR A,B.S W /S.S. ORATE — TYP PIPE SIZE DCOA USE LITY VAULT SPECIFICAliON OR OWNER EMM EQM6 4 4 875 LAW 2- -�i2i' ACC>~55 HATCH B" B' SB7 TL WJ z -332P ACCESS HATCM 8" @" 51 OS � - -3:S2P ACC NOTES BACKFLOW ASSEMBLY SHALL BE IISC APPROVED FOR WASHINGTON STATE. INSTAU. ASSEMBLY IN HORIEONTAL POSITION, VERTICAL POSITION IS ALLOWED IF APPROVED BY WASHINGTON STATE DEIWUMEAIT OF HEALTH OR USC UST FOR VERTICAL UP OR DOWN. BACKFLOW ASSEMBLY SHALL BE INSTALLS IN AN ACCESSIBLE LOCATION AT OR MllilN ONE FOOT OF THE PROPERTY LINE OR EASEMENT LNE AND ON''' THE OWNER'S PROPERTY UNLESS OTHERWISE APPROVED. DO NOT INSTALL IN AN AREA SUBJECT TO RAODING. . THE WATER LINE SHALL BE TESTED, DISINFECTED AND FWSHF.D PRIOR TO INSTALLING THE BACKFLOW ASSEMBLY. ALL ENCLOSURES SWILL BE APPROVED PRIOR 70 INSTALLATION. ALL PIPE, VALVES, AND FITTINGS FROM SUPPLY MAIN SHALL BE FLANGED OR FULLY RESTRAINED. ALL FASTENERS SHALL BE HOT DID GALVENIZED OR STAINLESS STEEL THE BACKFLOW ASSEWLY SHALL BE IESN O AFTER INSTALLATION AND PRIOR TO ACCEPTANCE AND ALSO ANNUALLY TF0EAFTER BY A CERTIFIED BACHFT.OW ASSEMBLY TESTER. TEST RESULTS SHAL BE SUBMITTED TO THE CITY OF BAINBRIDGE ISLAND. PUBUC WORKS DEPARTMENT, OPERATIONS & MAINTENANCE DNTSION. MAINTAIN MINIMUM 2V CLEARANCE ON ALL SMES AROUND THE BACKFLOW Pillmm ER, EXCEPT AS SHOWN, PROVIDE AN ADEQUATE CRAW DRAINAGE MI TM TO DAYLIGHT. IF NOT POSSIBLE, PROVIDE AN ADEQUATELY SIZED SUMP PUMP SYSTEM AND ELECTRICAL SUPPLY. -DRAJN COMP MAYBE PITTED IN ODE PROVIDED IT CITY OF BAI N B R I DG E ISLAND COMPLETELY DIWNB, TAMPER SWFMHES SHALL BE INSTALLED ON � STANDARD DETAILS GM VALVES AND CONNEOMO 70 BUIWINO FIRE ALARM SYSIT9�1. DOUBLE CHECK DETECTOR ASSEMBLY GROUT ALL. VAULT PENETRATIONS WITH FOR FIR I LER SYSTEMS 2" OR LARGER WATERTIGFST GROUT INSIDE ANP OUTSIOE. BURY ALL R&STAIHING RODS MIN. 2 . REV. DWG. NO. PAVADF ASSEMBLY A5 A WNULE MANUFACTURED f� ?•of•p8 SR 11 7�OUCH REAPS s x 314"L 111 INVEM5U5 GINEER DATE 10 --160 BURIED GATE VALVE ON INLET SIDE GATE VALVE G-w PLASTIC OR CONCRETE METER BOX---' ELEV TN 1 1/z TO I- BOXlSIZE �x7""40"06 ". NOTFS: BACKFLOW ASSEMBLY SHALL BE USC APPROVED FOR WASHINGTON STATE. INSTALL ASSEMBLY IN HORIZONTAL POSITION. VERTICAL POSITION IS ALLOWED IF APPROVED BY WASHINGTON STATE DEPARTMENT OF HEALTH OR USC LIST FOR VERTICAL UP OR DOWN. BACKFLOW ASSEMBLY SHALL BE INSTALLED IN AN ACCESSIBLE LOCATION AT OR WITHIN ONE FOOT OF THE PROPERTY LINE OR EASEMENT LINE AND ON THE OWNER'S PROPERTY UNLESS OTHERWISE APPROVED. DO NOT INSTALL IN AN AREA SUBJECT TO FLOODING OR FREEZING. THE WATER LINE SHALL BE FLUSHED PRIOR TO INSTALLING THE BACKFLOW ASSEMBLY. ALL ENCLOSURES SHALL BE APPROVED PRIOR TO INSTALLATION. THE SACKFL.OW ASSEMBLY SHALL BE TESTED AFTER INSTALLATION AND PRIOR TO ACCEPTANCE AND ALSO ANNUALLY THEREAFTER BY A CERT1fNED BACKFLOW ASSEMBLY TESTER. TEST RESULTS SHAD. BE SUB?ATTED TO THE CITY OF BAINBRIDGE ISLAND, PUBLIC WORKS DEPT.. OPERATIONS & MAI ENANCE DIVISION, GATE VALVES SHALL BE BRASS AND PIPE NIPPLES AND UNIONS SHALL BE BRASS OR SCHEDULE BD PVC. Arm ALL FASTENERS SHALL BE HOT. DIP GALVANIZED OR STAINLESS STEEL, Impm PROVIDE ASSEMBLY AS A SINGLE MANUFACTURED UNIT. I REV_ CITY OF BAINBRIDGE ISLAND STANDARD DETAILS DOUBLE CHECK VALVE ASSEMBLY / -./2"-AND SMALLER DWG. NO. 10 -161 WWII NO SIZE ON SIZE TAP FOR P.V.C. OR A.G. PIPE SUPPORT DRAIN TO DAYLIGHT 2X SLOPE SCREW JACKSKS. . $"MIN. SCHEDULE 40 P.V.C, OR HOT—DIP GAM iyP A.93 W/S.S, CRATE — TyP NOT FOR FIRE LINE --FOR DOMESTIC WATER SERVICE PIPE SIZE DCVA LISE "LML1Ty VAULT- SPECIFICATION OR 0 -ER APPROVED EQUAL 4 675 LA W 2 --332,P ACCESS HATCH NOTE 6" 6" 687 TL W/ 2 -332P ACCESS HATCH 8" 6" 5106 LA W1 2 --332P ACCESS HATCH ACWUW ASMM(aLY Moa BE U80 APPROM ROIL wAWRNOTON SATE. OUNLE OHEOK WILVI ASii kY'S ARE Not APPROVED FOR FIR: pROT MI, SYS/E)AS W MN WFY OF SAINIMM MM WATER SElI W MrAS. PAS emy IN "ORIZm& POSITIOR. YLRROAL PwmON a A mw= w Arpmw SIF yq*wm mm 08wmum OF HEILIH OR tm ubT FOR vu(MAL UP OR MO1LF7,DII' Al66JAN4Y SLW L SE NiSTALLG7 OI A?F A0 {pLM IAOAIH>'ll Ai OII olilBN ONE MOT OF THE PROPERTY LINE OR GSEME(If LINE AND ON ME OWNER'S PROFERIY NLESpf O7HERWDr APlROVCTr. DO NOT OMITALL fN MI AI 8U8,[OT 70 I`LAOCOip, WLT MAY EE NURIFAI UP 70 If* PROYIOEO ABLY 0 A Uk 1,R" AWK FMW (1PfAOLS PROIADE AN AOEOIlA7T GI[WIIY DRAM(A0E SY67lLI lb OYLYUOM. P NOf 104R4YLE, E01A0i AN AOL41{A LY 3rm SUYIP PUMP SYSIIN AHD � SUPPLY. DRAIN YIY NE FIRM >itOE pRTEMW R ONiO+LET�Y GRAINS 9 wAIER LINE WALL K TUM, OpM{om AND PLLlt o PRIOR 70 INSMLLINO THE SA0I01M AU MSLY. L [k"D ff= SIM EE APPROVED PRRWA 70 WR(ALLAWK L PIPE, WUM AND MMMiS" M SUPPIy LWN SWIL NE "AM= OR FULLY RESTRAMED. L FAST MIN SNALL K INor DIP a99&MYEO OR MNLBS gM[L. TO 9T �11E 8U SLSMI7tD 1 195, A 77w W NonOCe ou IEM MOplp{ O QIF AL 1 H _ iTNA A WRIFU M"FLOW AWJNKY 1E51[i1. PTO UNN°� ALOM 9MM CITY OF BAINBRIDGE ISLAND CAI TIE � FLaw �NL700fPF N &Wft STANDARD DETAILS our ALL VOLT IRA71ONS WITH WATERRTm UN iERGROUND — WITH UPSTREAM METER DW IHSFDE w Olil'LpM JURY ALL R!ilTARIRIO 8008 MIN, Y 74DE ASMKY 4 A IKNKE UMUFAMRM UNR. I YOUBIXCHECK. VALVE_ASSEMBLY REV. DWG. NO. ". 10 -162 OVERHEAD OPENING _ y •, � • R'FSYIIAI?JIHp �" GROUT €KrrmOR N!H _ � 2" hUt�. r IN ALL O RM RG SiIE OF D9 MODS OWL ° , HOT op wv. I -10 ALL PV 9, TYR. To AWIFACTURERS 3 BPWIFMA MS, sYP. CLASS 52 _ DWUN GALV. STEEL WALL I MOUNTED CHAMBER LADDER W1 EXTENSION UNDER ACCESS DOOR. 24" AIIN. PER STANDARD DETAIL } �i^ -�30 • f FINISH GRADE FLUSH W/ TOP !'1 �►N ( j�S — SEE TABLE BELOW fftrp: LADDER PER STANDARD __m_ . WWII NO SIZE ON SIZE TAP FOR P.V.C. OR A.G. PIPE SUPPORT DRAIN TO DAYLIGHT 2X SLOPE SCREW JACKSKS. . $"MIN. SCHEDULE 40 P.V.C, OR HOT—DIP GAM iyP A.93 W/S.S, CRATE — TyP NOT FOR FIRE LINE --FOR DOMESTIC WATER SERVICE PIPE SIZE DCVA LISE "LML1Ty VAULT- SPECIFICATION OR 0 -ER APPROVED EQUAL 4 675 LA W 2 --332,P ACCESS HATCH NOTE 6" 6" 687 TL W/ 2 -332P ACCESS HATCH 8" 6" 5106 LA W1 2 --332P ACCESS HATCH ACWUW ASMM(aLY Moa BE U80 APPROM ROIL wAWRNOTON SATE. OUNLE OHEOK WILVI ASii kY'S ARE Not APPROVED FOR FIR: pROT MI, SYS/E)AS W MN WFY OF SAINIMM MM WATER SElI W MrAS. PAS emy IN "ORIZm& POSITIOR. YLRROAL PwmON a A mw= w Arpmw SIF yq*wm mm 08wmum OF HEILIH OR tm ubT FOR vu(MAL UP OR MO1LF7,DII' Al66JAN4Y SLW L SE NiSTALLG7 OI A?F A0 {pLM IAOAIH>'ll Ai OII olilBN ONE MOT OF THE PROPERTY LINE OR GSEME(If LINE AND ON ME OWNER'S PROFERIY NLESpf O7HERWDr APlROVCTr. DO NOT OMITALL fN MI AI 8U8,[OT 70 I`LAOCOip, WLT MAY EE NURIFAI UP 70 If* PROYIOEO ABLY 0 A Uk 1,R" AWK FMW (1PfAOLS PROIADE AN AOEOIlA7T GI[WIIY DRAM(A0E SY67lLI lb OYLYUOM. P NOf 104R4YLE, E01A0i AN AOL41{A LY 3rm SUYIP PUMP SYSIIN AHD � SUPPLY. DRAIN YIY NE FIRM >itOE pRTEMW R ONiO+LET�Y GRAINS 9 wAIER LINE WALL K TUM, OpM{om AND PLLlt o PRIOR 70 INSMLLINO THE SA0I01M AU MSLY. L [k"D ff= SIM EE APPROVED PRRWA 70 WR(ALLAWK L PIPE, WUM AND MMMiS" M SUPPIy LWN SWIL NE "AM= OR FULLY RESTRAMED. L FAST MIN SNALL K INor DIP a99&MYEO OR MNLBS gM[L. TO 9T �11E 8U SLSMI7tD 1 195, A 77w W NonOCe ou IEM MOplp{ O QIF AL 1 H _ iTNA A WRIFU M"FLOW AWJNKY 1E51[i1. PTO UNN°� ALOM 9MM CITY OF BAINBRIDGE ISLAND CAI TIE � FLaw �NL700fPF N &Wft STANDARD DETAILS our ALL VOLT IRA71ONS WITH WATERRTm UN iERGROUND — WITH UPSTREAM METER DW IHSFDE w Olil'LpM JURY ALL R!ilTARIRIO 8008 MIN, Y 74DE ASMKY 4 A IKNKE UMUFAMRM UNR. I YOUBIXCHECK. VALVE_ASSEMBLY REV. DWG. NO. ". 10 -162 NIPPLE SIZE TO FITC4) TEST COCKS (4 REQ'D) PLA INSULATED SURFACE HOT BOX ENCLOSURE OR EQUIVALENT RESILIENT SEATED GATE VALVES (2 REVD) SHUTOFF VALVES (2 REQ'D) UNIONS VENT (2 - REWD) 12" MAIN. gXING .ELEVATION ABOVE GROUND INSTALLATION ONLY NOTES: BACKFLOW ASSEMBLY SHALL BE USC APPROVED FOR WASHINGTON STATE. INSTALL ASSEMBLY IN HORIZONTAL POSITION, VERTICAL POSITION IS ALLOWED IF APPROVED BY WASHINGTON STATE DEPARTMENT OF HEALTH OR USC LIST FOR VERTICAL UP OR DOWN, BACKFLOW ASSEMBLY SHALL BE INSTALLED IN AN ACCESSIBLE LOCATION AT OR WITHIN ONE FOOT OF THE PROPERTY LINE OR EASEMENT LINE AND ON THE OWNER'S PROPERTY UNLESS OTHERWISE APPROVED. DO NOT INSTALL IN AN -AREA SUBJECT TO BLOODING OR FREEZING. 'THE WATER UNE SHALL FLUSHED PRIOR TO INSTALLING THE BACKFLOW ASSEMBLY. ALL ENCLOSURES SHALL BE APPROVED PRIOR TO INSTALLA710N. ALL PIPE, VALVES, AND FITTINGS FROM SUPPLY MAIN SHALL BE FULLY RESTRAINED, ALL FASTENERS SHALL BE HOT DIP GALVANIZED OR STAINLESS STEEL. GATE VALVES. PIPE NIPPLES, AND UNIONS SHALL BE BRASS OR SCHEDULE BO PVC. PROVIDE ASSEMBLY S'"``E MANACr D UIT CITY OF BAINBRIDGE ISLAND THE nkCKFLOW ASSEMBLY SHALL PIE TESTED STANDARD DETAILS AFTER INSTALLATION AND PRIOR TO ACCEPTANCE AND ALSO ANNUALLY REDUCED PRESSURE BACKFLOW ASSEMBLY ASEYT�RCf AL ASSEMBLY TEST SHALL " & SMALLER BE SUDWITTEO TO THE CITY OF BAINBRIDGE ISLAND, PUBLIC WORKS REV. DWG, N0. DEPARTMENT, OPERATIONS k p, MAINTEiWJCE DIVISION. TTY E 10-153 t d MAUI TEST N. 3' (41RI WALL PIPE WY /FLANGE (FLIIFL) 1 3/4" SM*GHT BALI GRIP VALVE W/NPT TAPPED IWO - BO M OF 90r BEND C >� J.: - GAILY. STEEL WALL MOUNIED CHAMBER LADDER W/ T9(TETdSIGN_UNGER ACCUS DOOR: D" i } SEATED SKUTOFF VALVE (2 REQ'0) r 7YP. i. - TO FIRE DEPARTMENT SIAMRBE PUMPER CONNE071ON SWING TYPE ORAVIIY OPERATED CHECX VALVE (FLkFL) __ ( , . - 1 i!" MiN SECTION Dlra.(F (FUFL) LIT (TYT' TEE OLAUN In BLDG GL 52 OxP LLvt ! x4' MIN- .- — — I "�: DRAIN AUALI RY LINE CONSISTRVO OF APPROVED BACKFLOW PREVENTER AND WATER METER• INVENSUS SR -I1 TOUCH RM r_ w. 7.7 V b19'xve. RIM ,-C M $ - SEE TABLE BELOW TfP. L +.. �•�' r�s�it �t, �i ,ter*..' .eA � �j �� ; �•�;�'C�''ra .e. . BRAIN ANDY SRIN DIAIETEiZ SHALL It OR MCC AMEMMBBLY ELEVATION OMAIE7LR. CZARS 52 UP; (TYP) NOTES: WANPLOW ASSEMOW SHALL BE USC APPROVER FOR WASHINOfON STATE. INSTALL ASSEWLY IN IIORRONTAI• POSTf1DN, VERROAL PO5ITNIN IS ALLOM IF NWROVED BY WASHINGTON W AIE DEPARIVENT OF HEALTH OR USO LIST M POST INDICATOR VALVE - AS REQUIRED BY HIRE DEFT, OW1DE V5 ay4a.r• r. i • r .0 „.� �:• "•'.•' ., Fi7UN0AlION GRAW'T:L C ;'ON SUITABLE SSUSORADE "—DRAIN TO DAYLIGHT 2111 SLOPE a MIN. SCHEDULK 40 P V.O. OR ABLS W/S.S. ORATE - TYP WK-SEZIE-ift-AW USE SPE IFICATIDN OR OWNER 4. 4 87 -- 32P ACCESi HIATOH 8' 8” 887 TL W/ 2 -332P ACCESS HATCH B' 8" 6108 LA W/ 2 -332P ACCESS HATCH VERITMIL UP Sik OOWM. PROPERTY UA BL�E IMF 00 NOT P ALL N AN ARRFA ECf OT I FLOODING. OF THE PROPBCIY UK OR Fi{BEMMR LINE AND ON THE OMRIER'B VAULT MAY W BURIED UP 70 12' MV OW ASST UXY 19 A MIN. 12' ABOVE ANAL. ERASE PROVIDE AN E�MrAL SUPPLY. GRAIN Mk 09 FR' INIWE PRMDXD R OOMPLIZIELY DMN±�Y SD3D Lllli� PUMP SY LAND TILE WATER LINE SHALL e[ 7ESTEb. OTSINFUUM AND FL.IAHED PRIOR 7O NSTALLINO 11111E OACKFLOW ASIM&Y. ALL ENCLOSURE'S SK%LL CE APPROVED, PRIOR TO INSTALLAUM. ALL PIPE, VALVM AND FRTIWA FROM SUPPLY MAIN $WW, BE FIANOED OR FULLY RESF{R+sFNIA. ALL PASTENEINS $HALL K NOT OP GKVANIIED OR STAINLESS STEEL 711E BACIiF1AW ASSEMBLY SINLL K TE$MLB AFTER INSTALLATION AHD PRIOR TO AMWIANCE AND ALSO ANNUALLY 1HEREAFTFA DY A CERI1FlfA BADKrLOAW A$SEMIILY 745TER. TEST RT'SULTS ENALL BE SUMMED TO THE CRY OF MHFIMDGE I ANU, PUKM WORKS DEPARTMENT, OPEIATIONS & ~11DNIC£ Dh1SON. 'WPM SWITCHES SWLLL DE WSTAUUED ON GATE VALVO m A40 uAM CONN90YED TO 10JUNO FIRE A SYm MMMYNN MrI MM L PA&MiCE ON ALL TRAE CITY O F BA I N B R I D G E ISLAND AROUND THE TIVYCI(tI.pYY PA[VM]TIE11, EXCEPT AS SHDWN. ONLIT ALL VAULT FT rRA W.1n1 � STANDARD DETAILS WA MIGHT GROUT INSIDE AND +OUf111DE. BM ALL AESFAIMUD ROOS MIN, 2' REDUCED PRESSURE DETECTOR ASSEMBLY +rte AIN M Ur A SN°Lr FIRE SP INKLER SYSTEM 2" & LARGER DOUBLE VALVE PR' M � REV. DWC. No, WITHIN CRY OF BA1 BRXIOE ISLAND *ATM ;65w. L . a SERVIDE AREAS. CITY ENGINEM DATE 1 10-164 24" MIN, -- -+ TEST COCKS .y�(4 REQ'D) 14 I PROQT TYP. —► M PLAN B MIN. RESILIENT SEATED SHUTOFF -.--VALVE (2 REQ'D) ADAPTER AND Sf"41 =R , "•�d l: �.Z ;'S"'F: � ¢ ' ley;^ - 01AMETER SHALL BE oRtAlm TWIN OR 'OLAL ' •,s .;:.., a;, Z ,. +70 TWICE THE ASSEWLY "•,• •. TA IQr +.. DIAMETER. DRAIN PIPE DI CU52 OR PVC CoOO. QRMMU ONUSURABLE SUBORADE ABOVE GROUND INSTALLATION ONLY PIPE SIZE R 5E uraw vAucr SPECIFICA OR .OWNER APPROVED EQUAL 4 4 879 2-332P ACCESS HATCH- so 8" 887 TL W/ 2 -332P ACCESS HATCH an 8" 6 108 LA W/ 2-332P ACCESS HATCH BACKFlAW ASSEMBLY $WW.. BE USC APPROVED FOR WASHINORON STATf, INSTALL ASSEMBLY IN HORIZONTAL POSITION. VERTICAL POSITION IS ALLOWED IF APPROVED By WASHINGTON STATE DEPMTMt:NT OF Mt%ILTM OR USC UST FOR VEKT'ICRL UP OR DOW". BACK" ASSEMBLY. SHALL BE INSTALLED IN AN ACCESSIBLE LOCATION AT OR WITHIN ONE FOOT OF 1HE PAoPERfY LINE OR EASEMENT LINE AND ON THE OWNER'S PROPt7R1Y UNLESS OfiIERWISE APPROVED. OO NOT INSTALL IN AN AREA SlIAUECT 70 FLOODING. THE WATER LINE SHALL BE TESTED, DISINFECTED AND FLUSHED PRIOR TO INSTr1LLM•Xi THE eACKFIAW ASSEMBLY. ALL ENCLOSURES SHALT. BE APPROVED PRIOR TO INSTALLATION. ALL PIPE. VALVES, AND FITTINGS FROM SUPPLY MAIN SHALL BE FLANGED OR FULLY RESTRAINED. TNt: KFLAW A9SELIBLY SHA1J. BE TESTEb AFTER INS'!'AUATIpN AND PRIOR TO AC�PI' ANC£ AkJ} ALSO ANNUALL7 '�HEAEAFiER W11' A CERTIFIED HAOKfLOiY ASSEMBLY TESTER. PEST RESULT'S SHALL BE SUTIIRRTED TO THE CITY Of VIAINBRIOGE IBLANC!, PUBLtO WORKS DEPARTMENT, OPERATIONS Ae iIAINFENANCE OMSION• MIUNTAIN MINIMUM 24' CLEARANCE ON ALL SIDES O p PROVIDE AN ADEQUATE cRAVmr DRAINAGE SYSTEM 70 bAYtIG1iT. CITY OF BA I N B R I DG E ISLAND GROUT ALL VAULT PENETRATIONS WITH WATERTIGHT STANDARD DETAILS GROUT INSIDE AND OUTSIDE. auRr ALL RESTNNING Rope MIN. z "• ABOVE GROUND WITH UPSTREAM METER REDUCED PRESSURE BACKFLOW ASSEMBLY �D�YIDE ASSEMBLY AS A SINGLE MANUFACTURED REDUCED Z 1/2" AND LARGER FASTENERS SHALL BE HOT DIP OLVANIiED REV. - . DWG. NO, � �A�SF o -P It TTY FNarNEER DAIE 10-165 DRAIN r HOT BOX, /— CONCREIE VAULT -I OR EQUIVALENT, 12" MIN. :DI!oE0?Ni O ALL ESiYP k DRAIN 70 ygAYUGM 21i SLOPE B "MIN, SCHEDULE 40 P.Y.C. OR A.B.S W/S.S. OR4 1E - TYP TEST COCKS (2 REQ'D) 12" MIN. 60" MAX. OVE DOWNSTREAM HIGHEST POINT OF USE & ALL DOWN STREAM PIPING GROUND OR FLOOR T RESILIENT SEATED SHUTOFF VALVES (2 REQ'D) UNIONS (2 REQ'D) MIN. 6" CLEARANCES AROUND BACKFLOW PREVENTER, ALL SIDES, TOP AND BOTTOM. NIPPLE SIZE TO FIT(TYP) NQJES: A PVBA SHALL ONLY BE INSTALLED IN VERTICAL CONFIGURATION A MINIMUM OF 12" INCHES ABOVE THE HIGHEST DOWNSTREAM PIPING. BACKFLOW ASSEMBLY SHALL BE USC APPROVED FOR WASHINGTON STATE. IF INSTALLED) INDOORS, PROVIDE FOR OCCASIONAL WATER LEAKAGE FROM AIR INLET PORT. INSTALL IN AN ACCESSIBLE LOCATION. DO NOT INSTALL IN AN AREA SUBJECT TO FLOODING DR FREEZING. THE WATER LINE SHALL BE TESTED, DISINFECTED AND FLUSHED PRIOR TO INSTALLING THE BACKFLOW ASSEMBLY. GATE VALVES. PIPE NIPPLES, AND UNIONS SHALL BE BRASS OR SCHEDULE 80 PVC. ALL FASTENERS SHALL BE HOT -DIP GALVANIZED OR STAINLESS STEEL. THE BACKFLOW ASSEMBLY SHALL BE TESTED AFTER INSTALLATION AND PRIOR TO ACCEPTANCE AND ALSO ANNUALLY THEREAFTER BY A CERTIFIED BACKFLOW ASSEMBLY TESTER. TEST RESULTS SHALL "BE SUBMITTED TO THE CITY OF MISIBRIDGE ISLAND, PUBLIC WORKS DEPARTMENT, OPERATIONS & MAINTENANCE DIVI510N, AdIllft CITY OF BAINBRIDGE ISLAND STANDARD DETAILS lq%w PRESSURE VACUUM BREAKER ASSEMBLY FOR 2" & SMALLER REV. nwr. Nn 10 -166 DOUBLE CHECK. VALVE (TYP), W1 709 --4T OR ECIt GATE VALVE 6TYP'>, Ii MIN. NIPPLE SIZE TO FIT (TYPT 12'. MIN. TEE (TYP) DRAIN: 2" PVC SCHEDULE S 40 SLOTTED(1 /9" SLOTS — 1 O.C.) um HALF PIPE CAPPED ON END DRAIN LINE. DRAIN TO DAYLIGHT, MIN. OF 29 SLOPE mp.)• PI AN 90' BENC t bIOTES GRAVEL BASE SECTION 8ACKFLOW ASSEMBLY SHALL BE USC APPROVED FOR WASHINGTON STATE. (TYP) BEND (TYP) COPPER SIZE METER BOX. WSON 0 OR INSTALL ASSEMBLY IN HORIZONTAL POSITION. VERTICAL POSITION 13 ALLOWED IF APPROVED BY WASHINGTON STATE ]DEPARTMENT OF HEALTH OR USC LIST FOR, VERTICAL UP OR DOWN. RACKFLOW ASSEMBLY SHALL BE INSTALLED IN AN ACCESSIBLE LOCATION AT OR WITHIN ONE FOOT OF THE PROPERTY LINE OR EASEMENT LINE AND ON THE OWNER'S PROPERTY UNLESS OTHERWISE APPROVED, DO NOT INSTALL IN AN AREA SO JECT TO FLOODING OR FREEZING. THE WATER LINE SHALL BE TESTED, DISINFECTED AND FLUSHED PRIOR TO INSTALLING THE 8ACKFLOW ASSEMBLY. ALL ENCLOSURES SHALL BE APPROVED PRIOR TO INSTALLATION. THE BACKFLOW ASSEMBLY SHALL BE TESTED AFTER INSTALLATION AND PRIOR TO ACCEPTANCE AND ALSO ANNUALLY THEREAFTER BY A CERTIFIED BACKFLOW ASSEMBLY TESTER, TEST RESULTS SHALL BE SUBMITTED TO THE CITY OF BAINBRIDGE ISLAND, PUBLIC WORKS DEPT., OPERATIONS & MAINTENANCE DIVISION, GATE VALVES SWILL BE BRASS AND PIPE NIPPLES AND UNIONS SHALL BE CITY OF BA I N B R I D G E ISLAND BRASS OR SCHEDULE BO PVC. No STANDARD DETAILS SCHEDULE 40 IN BACKFLOW LINE. DOUBLE CHECK VALVE ASSEMBLY FOR THRE MANUFACTURED UNIT. A SINGLE UNITS DR�.GREATER — 2" AND SMALLER ALL FASTENERS SHALL HE HOT DIP REV. Fe DWG. N0. GALVANIZED OR STAINLESS STEEL. rol�o _ ....... EIY Ii BATE 10-167 SECTION 8 - ROAD ELEMENTS AND ROADSIDE FEATURES TABLE OF CONTENTS SECTION 8 ROAD ELEMENTS AND ROADSIDE FEATURES 8-22 TRAFFIC CONTROL SIGNS 4. Sign Posts: The City Engineer or Engineer's Representative shall determine the type of post to be used for each application. Wood sign posts will typically be used in unpaved areas, and steel sign posts will typically be used in paved areas. All sign posts shall be installed plumb. Wood Sign Posts: Wood sign posts shall consist of one solid untreated Western cedar timber and shall conform to guidelines for Construction Grade (Light Framing, Section 122 -b West Coast Lumber Inspection Bureau or Section 40.11 Western Wood Products Association). Posts by definition are presumed square and shall have a four (4) inch nominal thickness. Posts shall not be wrapped or encased in any other materials. Steel sign posts shall be 2" square by 12' long, perforated or knockout plugged, galvanized tube steel. Posts will be formed from cold rolled steel strip which has been zinc coated and is commercial quality (1.25 oz.) conforming to ASTM Specification A -525. Steel sign posts installed at the time of paving shall be inserted into a sleeve embedded in the new pavement. The sleeve shall be galvanized, perforated steel, 2' /a" x 2' /a" x 24" long, wrapped in duct tape before embedment to prevent penetration of debris through the bottom and perforations. Before placement, a minimum 4" long bolt shall be inserted horizontally through the bottom row of perforations to prevent the sleeve from being pulled out of the pavement. 2" of the sleeve shall be exposed vertically above the pavement. Once the sign post is inserted into the sleeve, the two shall be fastened together with a 5/16" galvanized corner bolt or straight bolt. Steel sign posts installed on existing pavement shall be inserted into a 24" long sleeve as specified above. The sleeve shall be centered and welded, full perimeter, to a galvanized 1/4" thick by 10" square steel plate. The plate shall have four 5/8" diameter holes, one per corner, and shall be fastened to the pavement using four galvanized anchor bolts, ` /i' x 5 %z ". Once the sign post is inserted into the sleeve, the two shall be fastened together with a 5/16" galvanized corner bolt or straight bolt. Revised March I, 2004 CITY OF BAINBRIDGE ISLAND DESIGN AND CONSTRUCTION STANDARDS AND SPECIFICATIONS SECTION 8 - ROAD ELEMENTS AND ROADSIDE FEATURES TABLE OF CONTENTS 5. Sign Mounting Hardware: shall be made of stainless or galvanized steel. Wood post hardware shall consist of two (2) 5/16" x 21/2" lag bolts and two 5116" flat washers, per sign. Post cap shall be made of cast aluminum that if four (4) inches by (4) inches. Steel post hardware shall consist of two 1(2) 5/16" x 2" hex head bolts, two (2) 5/16 flat washers, and two (2) hex nuts, per sign. Revised March 1, 2004 CITY OF BAINBRIDGE ISLAND DESIGN AND CONSTRUCTION STANDARDS AND SPECIFICATIONS