AgdaPkt 2014-03-24 Closed and Regular

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U . S . Arm y Corp of Cor Engineers - Letter of Permission To avoid take of steelhead,green sturgeon,longfin smelt,and California least tern,the following avoidance and minimization measures will be implemented by the Project: • All pile driving and dock installation work would be undertaken after June 15 and completed no later than November 30, to adhere to the south San Francisco Bay steelhead environmental work window, • Construction vessels will not come to rest on bay substrate during low tide periods; • If it is necessary to use an impact hammer.(a)any number and any size of wooden piles may be driven at between June 15 and November 30;(b)Concrete piles may be driven at any time of year as long as the pile diameter is less than 18 in;(c)steel piles may be installed at any lime of year as long as the piles are 12 in or less in diameter,the impact hammer is 3,000 pounds or smaller, and a wood cushion is used between the hammer and the pile; (d)use of an impact hammer is limited to one hammer and less than 50 piles installed per day. • if wood piles are used, wood material must be coated with an impact resistant, biologically inert substance,as described in the NLAA1 consultation; • if steel or concrete piles are used,any coating applied to the piles will be done outside of the work area and allowed time to fully cure prior to installation; • if in-place pouring of concrete is necessary, localized cofferdams will be used surrounding pilings or footings during repair; • Any repair of shallow water piles would need to be performed manually at low tide or using a vessel that would not rest on the bottom during low tide; • During construction activities, a debris barrier will be installed to retain any debris that falls into the water; • All preparation of dock and pier materials will be done on shore or in a designated area on the construction barge. If it is not possible to prepare all material on shore or on the construction barge,a tarp or netting could be installed in a designated work area on the pier; • Wooden deck material, if used, for the floating dock must be coated with an impact resistant,biologically inert substance,as described in the NLAA consultation; • Floatation devices(such as used on a floating dock)must be composed of materials that will not disintegrate, such as plastic or closed cell foam encapsulated in sun-resistant polyethylene, as described in the NLAA consultation; Contractor will follow the Water Quality Protection Plan,which contains BMPs and other measures to prevent hazardous materials from entering the waters of San Francisco Bay; • Contractor would have spill prevention and containment equipment during project construction. • These measures are incorporated into the Project Description to avoid and minimize potential • impacts to special-status species and other aquatic resources. Many of these measures are • based on the NLAA consultation,which was developed to avoid and minimize potential impacts to aquatic resources to a level that would not adversely affect aquatic species. These measures • are intended to avoid and minimize potential impacts to steelhead, green sturgeon, longfin smelt,and California least fern. • • • • • • A recent set of guidelines issued by the Corps,NMFS,and U.S.Fish and Wildlife Service,known as the Nol Likely to Adversely Affect(NLAA)consultation. • • 11