Draft EA - San Diego International Airport

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SAN DIEGO INTERNATIONAL AIRPORT – PROPOSED RUNWAY 9 DISPLACED THRESHOLD of loss of habitat. 32 California horned larks have been eliminated as a nesting species at SDIA. Horned larks are thought to nest at MCRD San Diego and are known to nest at Naval Air Station North Island. 33 Of the avian species discussed above, the California least tern, described in more detail below, has been recorded to use the habitable areas of SDIA during the nesting season. California Least Tern California least terns breed from San Francisco Bay south to Baja California. In San Diego County, this species is a fairly common summer resident from early April to the end of September. 34 Wintering areas are along the Pacific coast of South America. This small migratory tern nests colonially on undisturbed, sparsely vegetated, flat areas with loose, sandy substrate adjacent to open water foraging areas. The California least tern is federally listed as endangered with loss of nesting habitat being the primary cause for the initial decline of the population of the California subspecies. Few undisturbed beach nesting areas remain and California least terns are now found in varied habitats ranging from mudflats to airports. Breeding California least terns begin nesting in mid-May and June. California least terns abandon the nesting colonies by mid-August and migrate south by mid-September. California least terns exhibit tenacity to the colony site where they first breed successfully. Prey includes northern anchovy, top smelt, killifish, mosquito fish, shiner, surf perch, and mudflat gobies. California least terns have nested at multiple locations at SDIA with the first observations of terns thought to be nesting at SDIA occurring in 1969. 35 It is likely, given the historic configuration of the San Diego shoreline and the tern’s documented use of fill and airports, that nesting occurred at this site prior to 1969. 36 The site was first monitored for tern nesting in 1970; and, in that year, SDIA supported the third largest colony in the state. Nesting at the Airport has been documented in 28 of the last 36 years. Areas used for nesting by the California least tern have been monitored annually by the CDFG since 1976. Figure 3-5 depicts California least tern nesting locations on the Airport from 2003 through 2011. There is an annual fluctuation in the number of least tern nests at SDIA; the cause of this fluctuation is not known. Table 3-3 lists the number of least tern nests observed at SDIA from 2003 to 2012. It should be noted that some pairs of least terns may have more than one nest. 32 33 34 35 36 Gallagher, S.R., Atlas of Breeding Birds, Orange County, California, 1997. CH2M HILL, San Diego Unified Port District, Environmental Constraints Analysis for San Diego International Airport Master Plan 2020, March 1999. Unitt, P., San Diego Society of Natural History, The Birds of San Diego County, 1984. Craig, A., Survey of California Least Tern Nesting Sites, California Department of Fish and Game Wildlife Management Branch, 1970. Craig, A., Survey of California Least Tern Nesting Sites, California Department of Fish and Game Wildlife Management Branch, 1970. Affected Environment [3-26] Draft EA
SAN DIEGO INTERNATIONAL AIRPORT – PROPOSED RUNWAY 9 DISPLACED THRESHOLD Figure 3-5 California Least Tern Nests, Lindbergh Field, 2003-2011 NOTE: The four open, gravel ovals (0-1S, 0-2S, 0-3S, and 0-4S) that provide potential nesting habitat for the California Least Tern, and the location of nests from 2003-2011. Source: Robert Patton, August 2011. Prepared by: Hamilton Biological, Inc., August 2011. Table 3-3 Least Tern Nesting at SDIA, 2003-2012 YEAR ESTIMATED NUMBER OF BREEDING PAIRS AT SDIA NUMBER OF NESTS AT SDIA 1/ 2003 45-50 53 2004 65-70 76 2005 121-150 157 2006 114 131 2007 120-127 135 2008 122-124 139 2009 136 145 2010 110 116 2011 66-76 78 2012 96 130 Note: 1/ The number of nests is an estimate based on the mean of the estimated annual range of breeding pairs. Sources: URS Corporation, California Least Tern (Sternula antillarum browni) Status Summary for Lindbergh Field & Former Naval Training Center, 2010; Robert Patton, August 2011; San Diego International Airport; http://www.san.org/sdcraa/airport_initiatives/ environmental/sustainability.aspx (accessed: December 13, 2011); San Diego International Airport, 2013. Prepared by: Cooper Ecological Monitoring, Inc., February 2013. Draft EA Affected Environment [3-27]
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July 2013 DRAFT ENVIRONMENTAL ASSES
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Appendix A Agency Coordination
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Ms. Lennox South Coastal Informatio
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October 25, 2011 VIA E-MAIL Califor
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Appendix B Noise Methodology
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14 CFR Part 150 Update August 2009
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MISSION BEACH PACIFIC BEACH MISSION
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Appendix C Land Use Assurance for S
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San Diego County Regional Airport A
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WELCOME Northside Improvements San
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3 Overview 1. Purpose of Scoping Me
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5 2. Proposed Action San Diego Inte
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7 2. Proposed Action Specific proje
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2. Proposed Action Preliminary Purp
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11 3. Environmental Review Process
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Environmental Impact Categories Con
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15 4. Federal Actions • Approval
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Comments
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SAN DIEGO COUNTY REGIONAL AIRPORT A
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SCOPING MEETING - 11/16/2011 Page 6
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Draft EA - San Diego International Airport

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