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HomeMy WebLinkAboutPRE12-060 Plan Review Comments DEPARTMENT OF COMMUNITY AND ECONOMIC DEVELOPMENT M E M O R A N D U M DATE: August 6, 2012 TO: Vanessa Dolbee FROM: Arneta Henninger SUBJECT: Utility and Transportation Comments for RENTON 22 PLAT PREAP Pre 12-060, SE 18TH ST Parcel 2123059054 NOTE: The applicant is cautioned that information contained in this summary is preliminary and non-binding and may be subject to modification and/or concurrence by official city decision- makers. Review comments may also need to be revised based on site planning and other design changes required by City staff or made by the applicant. I have completed a preliminary review for the above-referenced 122 lot plat proposal located in the vicinity of Monroe Ave SE & SE 18th Ct northeasterly of Cedar River Pipe Line R/W all in Sect. 21, Twp 23N Rng 5 E. The following comments are based on the pre-application submittal made to the City of Renton by the applicant. WATER:  This site is located in the City of Renton water service boundary. There is an existing 8” CI water main in SE 18th St. See City of Renton drawing # W0256 for detailed engineering drawings. Static pressure ranges from 65 to 82 psi. Domestic meters with pressure exceeding 80 psi need to install pressure reducing valves.  The plat needs to connect to the above watermain.  There is an existing 8” CI in SE 20th Ct .  The plat needs to connect to this main.  There is an existing 8” watermain in SE 19th Ct.  The plat needs to connect to this main.  This project site is located in the 590 water pressure zone.  This site is not located in an Aquifer Protection Zone.  The project must provide domestic and fire service to serve the proposed development.  Per the City Fire Marshall, the preliminary fire flow requirement for a single family home is 1,000 gpm minimum for dwellings up to 3,600 square feet (including garage and basements). Renton 22 Pl Preap 12-060 Page 2 of 3 If the dwelling exceeds 3,600 square feet, a minimum of 1,500 gpm fire flow would be required.  A minimum of one fire hydrant is required within 300-feet of the proposed buildings and two hydrants if the fire flow goes up to 1,500 gpm. Lateral spacing of fire hydrants is predicated on hydrants being located at street intersections.  All fire hydrants need to be brought up to current code if not existing.  System Development Charges are based on the size of the water meters. This fee is collected as part of the construction of the utilities permit. SANITARY SEWER:  This site is located in the City of Renton sanitary sewer service boundary.  There is an existing 8-inch diameter sewer main in SE 18th St.  This project must show how it will provide sanitary sewer to provide each unit with an individual sewer service line.  The Sanitary Sewer SDC fees are based on the size of the domestic water meters. These fees are collected at the time a construction permit is issued. STREET IMPROVEMENTS:  The project shall be required to install curb, gutter, sidewalk and street lighting for the parcel being developed.  The internal streets shall have a 26-foot pavement section, 8-foot planter strips (includes face of curb) and 5-foot wide sidewalks in a 52’ dedicated right-of-way. Parking shall be allowed on one side on these streets except roads D & F. Roads D & F shall have an 18-foot pavement width, 8-foot planter strip & 5-foot sidewalk cross section.  Road F is required to extend to the west (delete the cul-de-sac) and to the north to connect with the alley which also needs to be extended to the west to connect with Road C.  A pedestrian connection from the cul-de-sac located at the southern plat boundary on Road B to the Cedar River pipe line R/W and a pedestrian connection on lots 24/25 to the Mercer Island Pipe Line R/W are required.  The project must provide vehicular access extending road C across the Cedar River Pipe line to the existing road stub to the south.  The alleys need to be 16 feet dedicated ROW with 12 feet of pavement in cross section.  Street lighting shall be per current City of Renton standards and specifications. Briefly decorative LED lighting on black poles spaced approximately 110’ is required on internal streets for the proposed plat.  Per City of Renton code all lot corners at intersections of dedicated public rights-of-way shall have a minimum radius of (15’) fifteen feet.  All new electrical, phone and cable services and lines must be underground. The construction of these franchise utilities must be inspected and approved by a City of Renton public works inspector prior to recording the plat.  Traffic mitigation fees apply; these fees are currently approximately $720 per lot. These fees are under review and may change.  A full Traffic study is required. STORM DRAINAGE:  There are existing 12-inch storm drainage facilities in SE 18th St. Renton 22 Pl Preap 12-060 Page 3 of 3  A drainage control plan designed per the King County Surface Water Manual 2009 is required. This site is located in the Flow Control Duration Standard Forested Conditions.  A geotechnical report including recommendations of appropriate BMP’s for drainage is required.  The conceptual storm drainage plan needs to address how the roof runoff from the new lots will be handled.  The Surface Water SDC fees are currently $1,012 per lot. These fees are collected at the time a construction permit is issued. GENERAL:  All required utility, drainage and street improvements will require separate plan submittals prepared according to City of Renton drafting standards by a licensed Civil Engineer.  All plans shall be tied to a minimum of two of the City of Renton Horizontal and vertical Control Network.  Permit application must include an itemized cost estimate for these improvements. Half of the fee must be paid upon application for building and construction permits, and the remainder when the permits are issued. There will be additional fees for water service related expenses. See Drafting Standards.