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.
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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.
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