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Home My WebLink AboutTED4002175.5TEMPORARY EROSION CONTROL NOTES 1. Before any construction or development activity occurs, a preconstruction meeting must be held with the City of Renton Department of Public Works, Design Engineer. 2. All limits of clearing and areas of vegetation preservation as prescribed on the plan shall be clearly flagged in the field and observed during construction. 3. All required sedimentation/erosion control facilities must be constructed and in operation prior to land clearing and/or other construction to insure that sediment laden water does not enter the natural drainage system. All erosion and sediment facilities shall be maintained in a satisfactory condition until such time that clearing and/or construction is completed and potential for on -site erosion has passed. The implementation, maintenance, replacement and additions to erosion/sedimentation control systems shall be the responsibility of the permittee. 4. The erosion and sedimentation control systems depicted on this drawing are intended to be minimum requirements to meet anticipated site conditions. As construction progresses and unexpected or seasonal conditions dictate, the permittee shall anticipate that more erosion and sedimentation control facilities will be necessary to insure complete siltation control on the proposed site. During the course of construction, it shall be the obligation and responsibility of the permittee to address any new conditions that may be created by his activities and to provide additional facilities, over and above minimum requirements, as may be needed to protect adjacent properties and water quality of the receiving drainage system. 5. Approval of this plan is for erosion/sedimentation control only. It does not constitute an approval of storm drainage design, size nor :Location of pipes, restrictors, channels, or retention facilities. 6. During the time period of November 1 through March 31, all project disturbed soil areas greater than 5,000 square feet, that are to be left unworked for more than twelve (12) hours, shall be covered :by mulch, sodding, or plastic covering. 7. In any area which has been stripped of vegetation and where no further work is anticipated for a period of 30 days or more, all disturbed areas must be immediately stabilized with mulching, grass planting or other approved erosion control treatment applicable to the time of year in question. Grass seeding alone will be acceptable only during the months of April through September inclusive. Seeding may proceed, however, ,whenever it is in the interest of the permittee, but must be augmented with mulching, netting, or other treatment approved by the City of Renton, outside the specified time period. 8. For all erosion/sedimentation control ponds where the dead storage depth exceeds 6 inches, a fence, a minimum of 3 feet high is required, with 3:1 side slopes. 9. A temporary gravel construction entrance, 241 x 501 x 8" of 4- to 6- inch quarry spalls shall be located at all points of vehicular ingress and egress to the construction site. rFC --r4 -2i;PS' STORM DRAINAGE NOTES 1. Before any construction or development activity occurs, a pre - construction meeting must be held with the City of Renton Department of Public Works, Design Engineer. 2. All construction skull. be in accordance with the 111988 Standard Spec ifi_cations for Road, Bridge and Municipal Construction" prepared by W . S.D. O.T. , and the American Public Works Associati.oil (APWA) , as amended by the City of Renton Department of Public Works. 3. The storm drainage system shall be constructed according to the approved plans which are on file in the Department of. Public Works. Any deviation fro.ril the approved plans will require written approval from the City of Renton Department of Public Works, Design Engineer_ or Storm Water Utility. 4. A copy of these approved plans must be on the job site whenever construction is in progress. 5. Datum shall be U.S.G.S. unless otherwise approved by City of Renton Department of Public Works. Reference belichmark and elevation are noted on the plans. 6. A11, sedimentation/erosion facilities must be in operation prior to clearing and building construction, and they must be satisfactorily maintained until construction is completed and the potential for on -site erosion has passed. 7. All retention/detention facilities must be installed and in operation prior to or in conjUn ctlon with all construction activity unless otherwise approved by the Department of Public Works, Storm Water Utility. 8. Grass seed may be applied by hydr_oseeding. The grass seed mixture, other than City of Renton Approved Standard Mixes, skull be submitted by a Landscape Architect and approved by the Department of Public Works, Storm Water Utility. 9. All. pipe and appurtenances shall be laid on a properly prepared foundation in accordance with Section 7-02.3 (1) of the current State of Washington Standard Specification for Road and Bridge Construction. This shall include necessary leveling of the trench bottom or the top of the foundation material as well as placement and compaction of required bedding material to uniform grade so that the entire length of the pipe will be supported on a uniformly uense unyielding base. All pipe bedding shall be APWA Class "C", with the exception of PVC pipe. All. trench backfill shall be compacted to minimum 95% for pavement and structural fill and 90% otherwise per AS`I'M D-1557-70. Pea gravel bedding shall be 6" over and under PVC pipe. 10. Galvanized steel pipe and aluminized steel pipe for all drainage facilities shall have asphalt treatment #1 or better inside and outside. 11. Structures shall not be permitted within 10 feet of the spring line of any storm drainage pipe, or 15 feet from the top of any channel bank. 12. All catch basin grates shall be depressed 0.10 feet below pavement level., 13. Open cut road crossings through existing public right-of-way will not be allowed unless specifically approved by City of Renton Department of Public Works, Design Engineer. 14. Rock for erosion protection of roadside ditches, where required, shall be of sound quarry rock placed to a depth of 1 foot and must meet the following specifications: 411-811/40%- 70 % passing; 2"-4" rock/30%-40 % passing; and -2" rock/10%-20 % passing. 15. All building downspouts and footing drains shall be connected to the storm drainage system, unless approved by the Department of Public Works, Design Engineer or Storm Water Utility. An accurately dimensioned certified as -built drawing of this drainage system will be submitted to the City of Renton upon completion. 17. The contractor_ shall be responsible for providing adequate safeguard, safety devices, protective equipment, flaggers, and any other needed actions to protect the lift, health, and safety of the public, and to protect property in connection with the performance of work covered by the contract. Any work within the traveled right-of-way that may interrupt normal traffic flow shall require an approved traffic control plan by the Traffic Engineering Division of the Department of Public Works. All sections of the W.S.D.O.T. Standard Specifications 1- 07 -2 3 , Traffic Control, shall apply. 18. Special drainage measures will be required if the project location is within the aquifer protection area. 16. Issuance of the Building or Construction Permit by the City of Renton does not relieve the owner of the continuing legal obligation and/or liability connected with storm surface water disposition. Further, the City of Renton does not accept any obligation for the proper functioning and maintenance of the system provided during construction. PACIFIC ENOINEERINO IDESION INC. 4M,2 /� 7 41, I `SIOfVAL�'�� EXPRES 0 ir IL t 0 F- 0- 0 0 W W Q� m 3m Ir W I Q NWO o � �co W. U 94-23 PROJECT NO. DGS DRAWN BY 6-28-94 ISSUE DATE LO X Q 0 N w z O _ 2- Z 00 «0 C) P. of : //- 9- 9SA C I CIVIL ENGINEERING AND PLANNING CONSULTANTS