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HomeMy WebLinkAboutPlan Review Comments PRE 12-042 DEPARTMENT OF COMMUNITY AND ECONOMIC DEVELOPMENT M E M O R A N D U M   DATE: June 13, 2012     TO: Jerry Wasser, Planner     FROM: Arneta Henninger, Plan Review     SUBJECT: Utility and Transportation Comments For: Tobin Short Plat 508 S. Tobin Street PRE 12-042 Parcel 0007200040      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 3-lot short plat proposal, located on the north side of S Tobin St and on the south side of the alley in the vicinity of Logan Ave S, all in Sect. 18, Twp 23N, Rng 5 E. The project site is adjacent to and east of the Root Short Plat (LUA 99-022), a 3-lot short plat that is also north of S Tobin St, adjacent to and south of the alley. 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. This site is not located in the Aquifer Protection Zone. It is located in the 196 pressure zone. Static at the street level is approximately 70 psi. There is an existing 12" CI water main located in S Tobin St. See City of Renton water drawing # W0020 for detailed information. The project will need to provide domestic service and fire service to serve the proposed development. If the project proposes 3 lots with a hammerhead, then a 4” water main will be required to be installed, connected to the main in S Tobin Street and extended to the north, in order to serve the new lots with separate service lines and meters. If the project develops 2 lots then the project will be required to install two separate water service lines to the main in S Tobin St. Per the City Fire Marshal, 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). 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. Water System Development Charges (SDC) are based on the size of any and all water meters. These fees shall be paid prior to the issuance of a construction permit and prior to the recording of the short plat. SANITARY SEWER: This site is located in the City of Renton sanitary sewer service boundary. There is an existing 8” sewer main in the right-of-way (S Tillicum St). See City of Renton sanitary sewer drawing #S-0449 for details. There is an existing 15” sanitary sewer located in S Tobin St. See City of Renton drawing S1901. 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 and prior to the recording of the short plat. STREET IMPROVEMENTS: A 6-foot right-of-way dedication on the north side of the parcel is required so the total alley width shall be 16’. A 16’ pavement section is required to be constructed on this alley that fronts this parcel on the north side. Street frontage improvements including curb, gutter, and sidewalk will be required along the frontage. Staff will support a request for street modification. All new electrical, phone, and cable services and lines must be undergrounded. 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 are approximately $750 per new lot and shall be paid prior to recording the short plat. STORM DRAINAGE: There are existing storm drainage facilities in S Tobin St. A conceptual drainage plan and report is required to be submitted with the formal application for the short plat. A drainage control plan designed per the King County Surface Water Manual 2009 is required. The project will be subject to a Small Drainage Review as noted in the 2009 Manual.  When discussing it with the engineer say the project will need to match existing conditions zone in the 2009 Manual. The conceptual storm drainage plan needs to address how roof runoff from the new lots will be handled. Surface Water SDC fees are $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.