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Orange County Coastal Regional Sediment Management Plan • Specific examples of ways to increase public education and awareness. Total Maximum Daily Load (TMDL) Considerations Section 303(d) of the Clean Water Act requires the states to make a list of waters that are not attaining water quality standards and to develop total maximum daily loads or TMDLs for all waters and pollutants on the 303(d) list. A TMDL is the maximum load of a pollutant that can be discharged from point and nonpoint sources without exceeding water quality standards in the water body. Sediment and/or siltation are sometimes identified as pollutants on the 303(d) list, as has occurred for San Diego Creek and upper Newport Bay. In March 1999 the Santa Ana Regional Water Quality Control Board approved a sediment TMDL for the Newport Bay watershed (http://www.ocwatersheds.com/NewportBaySedimentTMDL.aspx). The TMDL requires implementation and maintenance of sediment control measures to ensure that existing habitat acreages of Upper Newport Bay are not significantly changed and sediment discharges in the watershed are reduced by 50% over a multi-year period. The long term goal of the sediment TMDL is to reduce the frequency of dredging Upper Newport Bay to once every 20 to 30 years. Other rivers and streams within the Plan boundaries that empty to the ocean do not include sediment as a listed impairment. However, sediment delivery to the coast is generally impacted by flood control projects, sand mining, urbanization, and construction permits that require erosion and sediment control to maintain sediment on-site and restrict conveyance to receiving waters. Marine Life Protection Act (MLPA) Implications A Marine Protected Area (MPA) is a discrete geographic marine or estuarine area that has been designated by law, administrative action, or voter initiative to protect or conserve marine life and habitat. The Marine Life Protection Act South Coast Study Region contains several MPAs within the Plan area as finalized on January 1, 2012 and shown in Table 3.12. These MPAs include SMCAs and state marine reserves (SMRs). Marine resource protection varies among MPAs. No take of marine resources is proposed for the Bolsa Chica Basin SMCA, Laguna Beach SMR, and Laguna Beach SMCA. Commercial and recreational fishing are allowed with restrictions within the other SMCAs. Coastal RSM activities (e.g., beach nourishment and maintenance dredging) or other sediment uses (e.g., beach grooming) are identified as allowable uses in several of the South Coast Study Region MPAs as listed in Table 3.12 (CDFG, 2012). Maps showing the MPAs for the Orange County CRSMP study area are provided in Appendix C. Everest International Consultants, Inc. 3.58
Orange County Coastal Regional Sediment Management Plan Table 3.12 Orange County MPAs and Allowable Sediment Management MPA LOCATION ALLOWABLE SEDIMENT MANAGEMENT Bolsa Bay SMCA Bolsa Chica Basin SMCA Upper Newport Bay SMCA Crystal Cove SMCA Laguna Beach SMR Bolsa Bay Estuary, Huntington Beach Bolsa Chica Ecological Reserve, Huntington Beach Upper Newport Bay Crystal Cove State Park Laguna Beach Maintenance dredging Maintenance dredging Maintenance dredging Beach nourishment and other sediment management activities Laguna Beach SMCA Laguna Beach Maintenance dredging Dana Point SMCA Dana Point Source: http://www.dfg.ca.gov/mlpa/title14section632.asp Biological Impact Analysis (BIA) Resource Protection Guidelines The California Resources Agency and USACE formed the California CSMW to facilitate regional approaches for protecting, enhancing, and restoring California’s coastal beaches and sedimentsheds. The foundation of the CSMW’s efforts is the development of the California CSMP as described earlier. A key element of the California CSMP mission is to conserve, restore, and protect California’s coastal resources. Accordingly, the CSMW commissioned preparation of the Review of Sediment Management Impacts and Issues Relevant to Protection of California Coastal Biota, Volume 1: Biological Impacts Analysis (BIA) (SAIC, 2011a). In addition, a companion Volume 2 was prepared that provides an abbreviated user’s guide to the comprehensive review document, and includes resource protection guidelines (SAIC, 2011b). The guidelines address protection of California coastal habitats and sensitive resources throughout all phases from design through implementation of beach nourishment projects. The guidelines consider all the various activities associated with obtaining, delivery, and placement of sand at the beach. The guidelines address resource protection considerations (e.g., mitigation measures) relevant to sand compatibility between source materials and receiver sites, water quality, invertebrate recovery after sediment removal or placement, sensitive species and habitats. Guidelines are provided for vegetated habitats (e.g., eelgrass, surfgrass, kelp beds), clam beds, fish (e.g., grunion), birds (e.g., California brown pelican, least tern, snowy plover), and marine mammals Everest International Consultants, Inc. 3.59
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