Environmental Assessment Draft
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RECREATION OUTGRANT AT LOPEZ DEBRIS BASIN FOR LOS ANGELES MISSION COLLEGE ATHLETIC FIELDS ENVIRONMENTAL ASSESSMENT DRAFT State Clearinghouse No. 2002091071 Prepared for U.S. Army Corps of Engineers 915 Wilshire Boulevard Los Angeles, CA 90017 Applicant: Los Angeles Community College District 770 Wilshire Boulevard, Los Angeles, CA 90017 September 2009 915 Wilshire Boulevard, Suite 700 Los Angeles, CA 90017 Tel: 213.996.2200 Fax: 213.996.2290 URS Project No. 29405396 TABLE OF CONTENTS SECTION PAGE 1.0 PROJECT DESCRIPTION.......................................................................................... 1-1 1.1 Description of the Project and Proposed Action................................................................. 1-1 1.1.1 Proposed Action and Federal Scope of Analysis .................................................. 1-2 1.1.2 Description of the Project ........................................................................................ 1-2 1.1.3 Habitat Protection and Enhancements................................................................... 1-9 1.1.4 Construction .............................................................................................................1-10 1.1.5 Operations.................................................................................................................1-13 1.1.6 Relationship with other LAMC Projects ..............................................................1-13 1.1.7 Source of Funding....................................................................................................1-13 1.2 Purpose and Need...................................................................................................................1-13 1.2.1 Purpose of the Proposed Action ...........................................................................1-13 1.2.2 Need...........................................................................................................................1-14 1.3 Background Information........................................................................................................1-17 1.3.1 Project Location and Boundaries ..........................................................................1-17 1.3.2 Project Site ................................................................................................................1-17 1.3.3 ACOE Lopez Dam Basin Master Plan.................................................................1-18 1.3.4 LAMC 2007 Facilities Master Plan........................................................................1-18 1.3.5 LAMC’s Proposed 2009 Facilities Master Plan ...................................................1-18 1.4 Procedures to Protect Pacoima Reservoir ...........................................................................1-33 1.4.1 Real Estate Requirements .......................................................................................1-33 1.4.2 Reservoir Storage .....................................................................................................1-34 1.4.3 Flood Damage to Property.....................................................................................1-34 1.4.4 Flood Damage to Reservoir ...................................................................................1-37 1.4.5 Existing and Planned Project Use .........................................................................1-38 1.4.6 Induced Constraints to System Flexibility............................................................1-38 1.4.7 Constraints to Future System Flexibility...............................................................1-38 1.4.8 Public Safety..............................................................................................................1-38 1.4.9 Environmental Stewardship ...................................................................................1-39 1.4.10 Contingency Plan .....................................................................................................1-39 1.4.11 Reporting...................................................................................................................1-40 2.0 ALTERNATIVES..........................................................................................................2-1 2.1 Alternatives Considered and Not Carried Forward for Analysis ....................................... 2-1 2.2 Alternatives Analyzed ............................................................................................................... 2-5 2.2.1 Alternative 1 – No Action Alternative (No Lease of ACOE Property and No Development of Either ACOE or LACCD Properties)...................................... 2-5 2.2.2 Alternative 2 – Development of the LACCD Property Only............................. 2-6 3.0 AFFECTED ENVIRONMENT, PROJECT SETTING, AND ENVIRONMENTAL IMPACTS.......................................................................................................................3-1 3.1 Vegetation and Habitat............................................................................................................. 3-3 3.1.1 Affected Environment .............................................................................................. 3-3 3.1.2 Environmental Consequences.................................................................................. 3-3 3.2 Wildlife........................................................................................................................................ 3-9 U.S. Army Corps of Engineers i Recreation Outgrant for LAMC Athletic Fields DEA September 2009 Table of Contents 3.2.1 Affected Environment .............................................................................................. 3-9 3.2.2 Environmental Consequences.................................................................................. 3-9 3.3 Natural Drainage .....................................................................................................................3-13 3.3.1 Affected Environment ............................................................................................3-13 3.3.2 Environmental Consequences................................................................................3-13 3.4 Riparian and Wetland Resources...........................................................................................3-15 3.4.1 Affected Environment ............................................................................................3-15 3.4.2 Environmental Consequences................................................................................3-15 3.5 Endangered and Threatened Species....................................................................................3-19 3.5.1 Affected Environment ............................................................................................3-19 3.5.2 Environmental Consequences................................................................................3-20 3.6 Cultural Resources...................................................................................................................3-23 3.6.1 Affected Environment ............................................................................................3-23 3.6.2 Environmental Consequences................................................................................3-35 3.7 Water Quality and Supply ......................................................................................................3-45 3.7.1 Affected Environment ............................................................................................3-45 3.7.2 Environmental Consequences................................................................................3-50 3.8 Flood Control and Hydrology...............................................................................................3-55 3.8.1 Affected Environment ............................................................................................3-55 3.8.2 Environmental Consequences................................................................................3-55 3.9 Recreation.................................................................................................................................3-59 3.9.1 Affected Environment ............................................................................................3-59 3.9.2 Environmental Consequences................................................................................3-60 3.10 Air Quality................................................................................................................................3-65 3.10.1 Affected Environment ............................................................................................3-65 3.10.2 Environmental Consequences................................................................................3-70 3.11 Soils and Geology....................................................................................................................3-79 3.11.1 Affected Environment ............................................................................................3-79 3.11.2 Environmental Consequences................................................................................3-83 3.12 Erosion and Sedimentation....................................................................................................3-89 3.12.1 Affected Environment ............................................................................................3-89 3.12.2 Environmental