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HomeMy WebLinkAboutTESC for Small Sites* _ ? CITY OF "` ? ? AUBURN -- WASHINGTON PERMIT CENTER HANDOUT OF T.E.S.C. REQUIREMENTS FOR SMALL SITES Informational Brochure October 2004 Prepared by Development Section Engineering Division Public Works Department 25 West Main St. Auburn, WA 98001-4998 (253)931-3010 FAX (253) 931-3053 SMALL SITE TEMPORARY EROSION & SEDIMENTATION CONTROL (TESC) A small site is defined as being either a residential short plat or lots for single-family residences or duplexes. The following handout information is to be used to aid in the design of erosion and sedimentation control measures. As an additional resource, refer to the City of Auburn Design Standards Manual Chapter 5. For additional information please contact the Building Division at (253) 931-3020 and ask for a Building Inspector. 1. The erosion control facilities shown on the attached small site erosion control plan and details are to be used as guidelines for site construction. The City Inspector may require additional measures depending on individual site conditions. In addition, certain sites may require the submittal of a TESC site plan for review by the city. During construction these facilities shall be maintained or replaced by the contractor as determined by the City Inspector. 2. The implementation, maintenance and replacement of erosion control facilities are the responsibility of the homebuilder until all construction is approved. The erosion facilities shall be inspected daily by the homebuilder, and maintained to ensure continued properfunctioning. 3. Drainage, Erosion, Sedimentation Control facilities shall be sized for runoff volumes associated with graded sites. 4. TESC plans shall be designed so as not to adversely affect any public right-of- way oradjacent properties. 5. Siltation control measures (i.e., silt fences, ditches, etc.) shall be provided to protect adjacent properties. 6. Measures shall betaken to prevent silt-laden waterfrom entering the City's public storm system andlor adjacent or downstream rivers, streams, and sensitive areas. If these measures are not taken, the homebuilder shall be responsible for such remedial action as deemed necessary by the City Inspector. 7. No fill or cut slopes shall be steeper than two (2) horizontal to one (1) vertical unless a geotechnical report indicates otherwise. 8. When filling a site, particular care should be taken to prevent disrupting existing upstream surface drainage flow. 9. All TESC facilities shall be installed and in operation prior to the start of all other construction activities to insure that sediment-laden water and storm drainage runoff does not impact the adjacent properties or the natural drainage ways. Page 1 of 7 REF. H:IDEVELOPMENT1HandoutslT.E.S.C. Requirements for Small Sites (10-04) 10. The TESC facilities, including all perimeter controls, shall remain in place until final site construction is completed and approval has been received from the City Inspector. 11. All areas of active earthwork that has the potential for erosion and sedimentation impact on adjacent properties and drainage ways must be stabilized per Auburn Standards or as directed by the City Inspector. This may be accomplished by using straw or hay, or covering the site with plastic. Straw and hay should be spread across the site to a minimum thickness of 2 inches. 12. All areas of active earthwork which has the potential for erosion and sedimentation impacts on adjacent properties and drainage Ways must be stabilized using the above criteria according to the following schedule: From April 1 to September 30, areas at final grade and those that are scheduled to remain unworked for more than 30 days, shall be stabilized within 10 days. From October 1 to March 31, earthwork activities shall be conducted in stages in order to minimize soil exposure. Exposed soils with an area greater than 5,000 square feet that are scheduled to remain unworked for more than 24 hours and exposed areas of less than 5,000 square feet that will remain unworked for more than 7 days shall be stabilized immediately 13. Individual sites may require special needs depending on the circumstances. For example, many single lots will not be large enough for the required construction entrance. In such cases the City inspector may allow the homebuilder to install a smaller entrance with the provision that the street will be cleaned of all construction debris atthe end of the day. 14. This document is a supplement to the original plat plan that was approved by the Public Works Department. This approved plan would include a TESC plan and related notes. A "winter action plan" may also be shown on the plan. 15. The attached Standard Detail drawings are to be used in the design of the TESC plan. Page 2 of 7 REF. H:IDEVELOPMENT1HandoutslT.E.S.C. Requirements for Small Sites (10-04) .. ?.? • • s ? r +' wy L _r 4 ? .? I rrQti J? rlr?.r•; ? i f Y ..S I1Fi Y ?? w ? '? -. r" ? ,.v .. s• •. 1 .1?r •:..eti'?... ??. _ r.ti• r':,mr?.?sr,l? ?• nr 1u_u ... ry. r?rl?a .rr'r1?1. l I _ ? r d, ti • ?, 1• ? ,4 .. • . • ' ¦y ?a 7 , ti 14°SI r ?, ti R ? 1 ?? •111 ??? ?-,. `? .., ? • a.. ??: i? C 1?? , q,,.r •? r. .I?r? I'° . ,. ` r X17+?::?• ?'?• $7L ??1111 i .? ti? 1 ? • 1•.., • ® ? . ` rya 1 ?, ? .s q l ? ?i - ?d fff `? r ?? L ? y:? } ? ? ? r? ti ?? ' .FLU ti?°•.?I?Iv? q?": ?y I ?. 51 ? a ,}?¦yp 1L¦ 1?ti ? 4 k'-??: !n , i:1¦7. 9..d1¦ , ? 1i iYr. L,17.® •?I?y% ¦ ". 5E •-. ? ?r? ? ?4L.IY .?? 164 7.??,1?. °. ?.? R?1 y? 1 •al A "" ?91 ? ? ; r? 1 .{dry ti. C R 7 °T. ?? 9 y: ? 111¦¦¦ h ???r ? IIL Itir. I ? ?IrY' ? } ?? •1? 'fiti } ?.? ? 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