Res10 P-2095 - Laserfiche WebLink

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be smaller in magnitude than naturally occurring turbidity events. In addition,any increased turbidity from project construction activities would be short-term during the 1-2 week, in-water portion of the project construction. The water and shoreline construction will be conducted under permits from the Regional Water Quality Control Board (RWQCB), San Francisco Bay Conservation and Development Commission (BCDC), and the U.S. Army Corps of Engineers (Corps). These permits are required to assure that there would be no violation of existing water quality standards or waste discharge requirements pursuant to the Clean Water Act. The project would be in compliance with these existing standards and requirements b) The Project would not deplete groundwater supplies or interfere substantially with groundwater recharge, such that there would be a net deficit in aquifer volume or a lowering of the local groundwater table level. The project site is an inundated,intertidal aquatic habitat that has no direct influence as a groundwater recharge area. There is no potable use of groundwater in the vicinity of the Multi-Agency Maritime Facility (Note: water wells occur on other Port of Redwood properties, but such water is not used for potable uses). The project does not involve an increase in water demand or water consumption.No impacts to groundwater would occur as a result of the Facility renovation and upgrading. c) The rates of natural sedimentation in Redwood Creek Channel vary by location,but the source of the sediments appears to be the silt laden waters of the San Francisco Bay rather than from erosion at the riprap protected shoreline area of the project site.The proposed project would result in a removal and redistribution of about 4 feet of existing riprap. Potentially,during high tide conditions,sediments confined in the interstitial spaces in the riprap could be released to the surrounding waters. Such quantities are anticipated,however,to be small and localized. The resultant sedimentation would be less-than-significant. The proposed Multi-Agency Maritime Facility renovation and upgrading involves boat docking and launching structures,with minor installation of utilities and lighting. It does not include structures that could alter the course of a stream or river.The project activities are not expected to result in significant erosion or siltation. d) The project will not change absorption rates,or drainage patterns.The Project is not expected to alter the course of a stream or substantially increase the rate or amount of surface runoff in a manner that would result in flooding onsite or offsite. e) The Multi-Agency Maritime Facility renovation and upgrading would take place in a submerged,aquatic environmental and therefore would not create or contribute to runoff that would exceed the capacity of existing or planned strormwater drainage systems. 1) The proposed improvements to the Multi-Agency Maritime Facility are not expected to substantially degrade water quality. g) The proposed improvements to the Multi-Agency Maritime Facility do not include the construction or development of residential housing,commercial,or industrial structures,or other inhabitable building structures within a 100-year flood hazard area as mapped on a federal flood hazard boundary or flood insurance rate map or other flood hazard delineation map. h) The proposed project would not impede or accelerate flood flows in the area. The project does not involve the construction of structures within the 100-year flood hazard zone,increase exposure of people or structures to the risk of flooding,or increase the risk of inundation by seiche,tsunami, or mudflow. i) The project site is not located within an area with a control levee or dam. The proposed project would not expose people or structures to a significant risk of loss,injury or death involving flooding as a result of the failure of a levee or dam. Port of Redwood City Multi-Agency Maritime Facility 31 February 2010 Initial Study