EVEREST June, 2013 - California Department of Boating and ...

Orange County Coastal Regional Sediment Management Plan
• Federal and state endangered California least tern (Sterna antillarum browni);
• Federal threatened western snowy plover (Chardrius alexandrinus nivosus) and critical
habitat;
• Federal endangered Southern California Steelhead (Oncorhynchus mykiss) evolutionary
significant unit and critical habitat (“evolutionary significant unit” is a term developed by
NOAA Fisheries (NMFS, 2012a) to describe distinct population segments of salmon
under the endangered species act);
• Federal endangered green sea turtle (Chelonia mydas);
• Fully protected marine mammals such as California gray whale (Eschrichtius robustus)
and protected dolphins, porpoises, seals and sea lions (Fully Protected is a designation
used by the CDFG);
• Fully protected California brown pelican (Pelecanus occidentalis californicus);
• California grunion (Leuresthes tenuis) spawning beaches;
• Pismo clam (Tivela stultorum), if within persistent clam bed areas; and
• Olympia oyster (Ostrea lurida), if within persistent oyster bed areas.
Table 3.7 summarizes the regional distribution of coastal habitats in Orange County. The
locations of many of these habitats in the vicinity of potential RSM areas are shown on Figures
3.5 through 3.9.
Figures 3.5 through 3.9 show locations of hard-bottom, canopy kelp, seagrasses, bays and
estuaries (including harbors), man-made hard-bottom structures, selected managed species,
and RSM locations. The figures are intended to show the types of habitats and resources
generally considered with coastal RSM projects involving beach nourishment, and include
locations of receiver sites and sediment sources identified in Sections 3.1 and 3.2 of this report.
The identified USACE sites include dredge and receiver areas that have been historically used
within the region. The figure legends list a portion of the types of data in the project geographic
information system (GIS). Individual figures show the available mapped data for different
reaches of the study area where RSM activities have or may occur.
The tan colored polygon called hard substrate includes bedrock and cobble; sand is the
dominant habitat type offshore and generally may be assumed in areas where hard-bottom is
not shown. Some nearshore bedrock areas and embayment soft-bottom areas include
vegetated habitats.
Everest International Consultants, Inc. 3.24