11907 SILVER WAY 2024-01-02 - Laserfiche WebLink

ii. Be placed so that their length within the right-of-way is minimized. 2. Meter boxes shall be set at the inside edge of the right-of-way line, but not within curb ramps. Where a utility easement exists adjacent and parallel to the right- of-way, meter boxes shall be placed in the utility easement. 3. Septic tank effluent lines shall: i. Have a minimum inside diameter of 2 inches. ii. Be encased in cast or ductile iron pipe. iii. Be placed with a minimum of 4 feet of cover from the lowest roadside feature (i.e. bottom of ditch), within 10 degrees of deflection from a perpendicular line to road centerline and shall extend to outside the right- of-way line. Private easements shall be used for installation parallel to the right-of-way line. iv. Be jacked or bored under the roadway unless otherwise approved by the Engineer. v. Not exceed a length within the right-of-way of 60 feet or the minimum width of the existing right-of-way, whichever is larger. G. Appurtenances 1. Vents may be required for casings, tunnels and galleries enclosing carriers of fluids or gases in accordance with federal, state or local standards. Vent standpipes shall be located as close to the right-of-way line as possible to minimize interference with road operation and maintenance, and shall not be concealed by vegetation. 2. Drains may be required for casings,tunnels or galleries enclosing carriers of fluids or gases in accordance with federal, state or local standards. Drains for carriers of hazardous materials shall be directed to artificial holding areas to prevent possible surface or groundwater contamination. Drains for which only water or other non-hazardous liquids may discharge may be directed into roadway drainage systems at locations approved by the Engineer. The drainage outfall shall not be used as a waste way for routine purging of the carrier pipe unless specifically authorized by the Engineer. 3. Manholes shall be designed and located in a manner that will cause the least interference to other utilities or future road expansion. Where practicable, installations in the pavement or shoulders shall be avoided. 8-05 UNDERGROUND UTILITY INSTALLATION See Standard Drawings 8-030, 8-040 A. General 1. The WSDOT/APWA Standard Specifications, particularly Sections 5-04, 7-08.3(3) and 9-01 through 9-03, shall apply unless otherwise stated below. Applicable federal and state regulations regarding trench safety shall be met. 2. Pavement cuts shall not be allowed in roads that have been constructed, reconstructed, or resurfaced with either an asphalt overlay (HMA Class 1/2-inch) 8-4 Engineering Design and Development Standards September 17, 2021