Loading...
HomeMy WebLinkAboutTED4002165.10SECTION 18, TWP 23 N, RGE 5 E, W.M. CITY OF RENTON STORM WATER DRAINAGE NOTES SANITARY SEWER NOTES & SPECIFICATIONS EROSION CONTROL NOTES 1. BEFORE ANY CONSTRUCTION OR DEVELOPMENT ACTIVITY OCCURS, A PRE- 1. All work materials shall be in conformance with the standards and 1. BEFORE ANY CONSTRUCTION OR DEVELOPMENT ACTIVITY OCCURS, A PRE - CONSTRUCTION MEETING MUST BE HELD WITH THE CITY OF RENTON specifications of the City of Renton and the latest edition of the WSDOT/APWA CONSTRUCTION MEETING MUST BE HELD WITH THE CITY OF RENTON DEVELOPMENT SERVICES DIVISION, PLAN REVIEW PROJECT MANAGER. Standards and Specifications. DEVELOPMENT SERVICES DIVISION, PLAN REVIEW PROJECT MANAGER 2. All construction shall be in accordance with the latest edition of the "Standard 2. The hours of work in the street right-of-way shall be limited to 8:30 a.m. to 2. All limits of clearing and areas of vegetation preservation as prescribed on the Specifications for Road, Bridge and Municipal Construction" prepared by 3:30 p.m. on weekdays unless otherwise approved in writing by the plan shall be clearly flagged in the field and observed during construction. W.S.D.O.T., and the American Public Works Association (APWA), as amended Transportation Division at 277-6222. all street closures, partial or full, shall be by the City of Renton. approved by the Transportation Division 24 hours in advance. The Police 3. All required sedimentation/erosion control facilities must be constructed and in Department, Fire Department, and 911 shall be notified 24 hours in advance. operation prior to land clearing and/or other construction to insure that 3. The storm drainage system shall be constructed according to the approved sediment laden water does not enter the natural drainage system. All erosion plans which are on file with the City of Renton. Any deviation from the 3. All construction shall be in accordance with "Standard Specifications for and sediment facilities shall be maintained in a satisfactory condition until such approved plans will require written approval from the City of Renton Municipal Public Works construction" prepared by Washington State Chapter time that clearing and/or construction is completed and potential for on -site Development Services Division. American Public Works Association, latest edition (APWA) and the City of erosion has passed. The implementation, maintenance, replacement and Renton Standard Specifications. additions to erosion/sedimentation control systems shall be the responsibility 4. A copy of these approved plans must be on the job site whenever construction of the permittee. is in progress. 4. All locations of existing utilities shown are approximate and it shall be the contractor's responsibility to verify the true and correct location so as to avoid 4. The erosion and sedimentation control systems depicted on this drawing are 5. Datum shall be U.S.G.S. unless otherwise approved by City of Renton. damage or disturbance. intended to be minimum requirements to meet anticipated site conditions. As Reference benchmark and elevation are noted on the plans. construction progresses and unexpected or seasonal conditions dictate, the 5. A preconstruction conference and a 24-hour notice shall be required prior to permittee shall anticipate that more erosion and sedimentation control facilities 6. All sedimentation/erosion facilities must be in operation prior to clearing and starting new construction. It shall be the contractor's responsibility to secure will be necessary to insure complete siltation control on the proposed site. building construction, and they must be satisfactorily maintained until all necessary permits prior to starting construction. (Inspection will be During the course of construction, it shall be the obligation and responsibility construction is completed and the potential for on -site erosion has passedaccomplished by a representative of the City of Renton.) It shall be the of the permittee to address any new conditions that may be created by his contractor's responsibility to notify the City Inspector 24 hours in advance of activities and to provide additional facilities, over and above minimum 7. All retention/detention facilities must be installed and in operation prior to or in backfilling all construction. requirements, as may be needed to protect adjacent properties and water conjunction with all construction activity unless otherwise approved by the quality of the receiving drainage system. Development Services Division. 6. Contractor is solely responsible for the means, methods and sequences of construction and for the safety of workers and others on the construction site. 5. Approval of this plan is for erosion/sedimentation control only. It does not 8. Grass seed may be applied by hydroseeding. The grass seed mixture, other constitute an approval of storm drainage design, size, nor location of pipes, than City of Renton approved standard mixes, shall be submitted by a 7. It shall be the responsibility of the contractor to obtain street use and any other restrictors, channels, or retention facilities. Landscape Architect and approved by the Development Services Division. related permits prior to any construction. 6. During the time period of November 1 through March. 31, all project disturbed 9. All pipe and appurtenances shall be laid on a properly prepared foundation in 8. Plans approved by the City of Renton, Development Services Division, shall soil areas greater than 5,000 square feet, that are to be left unworked for more accordance with Section 7-02.3(1) of the current `.Mate of Washington take precedence over all other plans. than twelve (12) hours, shall be covered by mulch, sodding, or plastic covering. Standard Specification for Road and Bridge Construction. This shall include necessary leveling of the trench bottom or the top of the foundation material 9. A copy of these approved plans must be on the job site whenever construction 7. in any area which has been stripped of vegetation and where no further work as well as placement and compaction of required bedding material to uniform is in progress. is anticipated for a period of 30 days or more, all disturbed areas must be grade so that the entire length of the pipe will be supported on a uniformly immediately stabilized with mulching, grass planting or other approved erosion dense unyielding base. All pipe bedding shall be APWA Class "C," with the 10. The contractor shall provide the City of Renton with an as -built drawing of the control treatment applicable to the time of year in question. Grass seeding exception of PVC pipe. All trench backfill shall be compacted to minimum 95% sanitary sewer system which has been stamped and signed by a licensed alone will be acceptable only during the months of April through September for pavement and structural fill and 90% otherwise per ASTM D-1557-70. Pea professional engineer or licensed professional surveyor. inclusive. Seeding may proceed, however, whenever it is in the interest of the gravel bedding shall be six inches over and under P.V.C. pipe. permittee, but must be augmented with mulching, netting, or other treatment 11. Backfill shall be placed equally on both sides of the pipe in layers with a loose approved by the City of Renton, outside the specified time period. 10. Galvanized steel pipe and aluminized steel pipe for all drainage facilities shall average depth of six inches, maximum depth of eight inches, thoroughly have asphalt treatment #1 or better inside and outside. tamping each layer to 95 percent of maximum density. These compacted 8. For all erosion/sedimentation control ponds where the dead storage depth layers must extend for one pipe diameter on each side of the pipe or to the side exceeds six inches, a fence, a minimum of three feet high is required, with 3:1 11. Structures shall not be permitted within ten feet of the spring line of any storm of the trench. Materials to complete the fill over pipe shall be the same as side slopes. drainage pipe, or 15 feet from the top of any channel bank. described. 9. A temporary gravel construction entrance, 24' x 50' x 8" of 4- to 6--inch quarry 12. All catch basin grates shall be depressed 0.10 feet below pavement level. 12. Open cut road crossings for utility trenches on existing traveled roadway shall spalls shall be located at all points of vehicular ingress and egress to the be backfilled with crushed rock and mechanically compacted. Cuts into the construction site. 13. Open cut road crossings through existing public right -of --way will not be allowed existing asphalt shall be neatline cut with saw in a continuous line. A unless specifically approved by City of Renton. temporary mix patch must be placed immediately after backfill and compaction. 10. The contractor shall be responsible for controlling pollution, erosion, and surface A permanent hot mix patch shall be placed within ten days and shall be per City water runoff by performing the work to prevent, control, and stop water pollution 14. Rock for erosion protection of roadside ditches, where required, shall be of of Renton current standards. or erosion within the project, including but not limited to: sound quarry rock placed to a depth of one foot and must meet the following specifications: 4"-8"/40%-40% passing; 2"-4" rock/30%-50% passing; and - 13. Datum shall be City of Renton, U.S.C. and G.S. 1. Maintaining the existing storm sewer at all times by providing ditches, 2" rock/10%-20% passing. berms,. culverts, pumps and other measures to control surface water. 14. All disturbed areas shall be seeded and mulched or otherwise stabilized to the 15. All building downspouts and footing drains shall be connected to the storm satisfaction of the Department for the prevention of on -site erosion after the 2. Building dams, settling basins, energy dissipaters, and other measures, to drainage system, unless approved by the Development Services Division. An completion of construction. control downstream flows. accurately dimensioned Certified as -built drawing of this drainage system will be submitted to the City of Renton upon completion. 15. All pipe and appurtenances shall be laid on a properly prepared foundation in 3. Controlling underground water found during construction. accordance with Section 7-02.3(1) of the current State of Washington 16. Issuance of Building or Construction Permits by the City of Renton does not Standard Specifications for Road and Bridge Construction. this shall include 4. Covering or otherwise protecting slopes until permanent erosion -control relieve the owner of the continuing legal obligation and/or liability connected necessary leveling of the trench bottom or the top of the foundation material measures are working. with storm surface water disposition. Further, the City of Renton does not as well as placement and compaction of required bedding material to uniform accept any obligation for the proper functioning and maintenance of the system grade so that the entire length of the pipe will be supported on a uniformly provided during construction. dense unyielding base. Pipe bedding shall be pea gravel six inches above and below the pipe. `z 17. The Contractor shall be responsible for providing adequate safeguard, safety , devices, protective equipment, flaggers, and any other needed actions to 16. Sanitary sewer pipe shall be ductile iron class 52. protect the lift, health, and safety of the public, and to protect property in cl connection with the performance of work covered by the contract. Any work 17. In unimproved areas, manhole to extend minimum six inch and maximum 18 s within the traveled right-of-way that may interrupt normal traffic flow shall inch above finished grade. In paved area, cover must slope in all directions to require an approved traffic control plan by the Transportation Division. All match paving. 4 A sections of the W.S.D.O.T. Standard Specifications 1-07-23. Traffic Control, 10.g•91 �,,h1 shall apply. ----i 18. Special drainage measures will be required if the project location is within theTY OF RENT( Leonard Boudinot & Skod'e Inc.Iaquifer protection area. Leonard, � I DEPARTMENT OF PUBLIC IFA, PROFESSIONAL ENGINEERS & LAND SURVEYORS