Powerline Plan and Environ. Assessment Jan. 2013 - Flood Control ...

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Powerline Flood Retarding Structure Pinal County, AZ Draft Supplemental Watershed Plan and Environmental Assessment To file a complaint of discrimination, complete, sign, and mail a program discrimination complaint form, available at any USDA office location or online at www.ascr.usda.gov, or write to: USDA Office of the Assistant Secretary for Civil Rights 1400 Independence Avenue, SW. Washington, DC 20250-9410 Or call toll free at (866) 632-9992 (voice) to obtain additional information, the appropriate office or to request documents. Individuals who are deaf, hard of hearing, or have speech disabilities may contact USDA through the Federal Relay service at (800) 877-8339 or (800) 845-6136 (in Spanish). USDA is an equal opportunity provider, employer, and lender. Persons with disabilities who require alternative means for communication of program information (e.g., Braille, large print, audiotape, etc.) should contact USDA's TARGET Center at (202) 720-2600 (voice and TDD). USDA- NRCS Page iii January 2013 Kimley-Horn and Associates, Inc.
Powerline Flood Retarding Structure Pinal County, AZ Draft Supplemental Watershed Plan and Environmental Assessment TABLE OF CONTENTS 1.0 SUMMARY SUPPLEMENTAL WATERSHED PLAN AND ENVIRONMENTAL ASSESSMENT ................................................................................................................ 1-1 2.0 PURPOSE AND NEED FOR ACTION ............................................................................ 2-1 2.1 Changes Requiring Preparation of a Supplement .......................................................... 2-1 2.2 Background ................................................................................................................. 2-1 2.3 Existing Dam Condition .............................................................................................. 2-2 2.4 Inadequacies of Structure ............................................................................................. 2-4 2.5 Regulatory Considerations ........................................................................................... 2-6 3.0 SCOPE OF PLAN/EA ...................................................................................................... 3-1 4.0 AFFECTED ENVIRONMENT ........................................................................................ 4-1 4.1 Climate ........................................................................................................................ 4-1 4.2 Geology ....................................................................................................................... 4-1 4.3 Soils ............................................................................................................................ 4-3 4.4 Surface Water .............................................................................................................. 4-3 4.5 Water Quality .............................................................................................................. 4-3 4.6 Water Conveyance Infrastructure ................................................................................. 4-4 4.7 Sedimentation .............................................................................................................. 4-4 4.8 Vegetative Community ................................................................................................ 4-4 4.9 Wetlands /Significant Nexus Analysis ......................................................................... 4-5 4.10 Fish and Wildlife ......................................................................................................... 4-6 4.11 Threatened and Endangered Species ............................................................................ 4-6 4.12 Transportation ............................................................................................................. 4-8 4.13 Land Use ..................................................................................................................... 4-8 4.14 Land Rights and Relocations........................................................................................ 4-9 4.15 Important Agricultural Lands ....................................................................................... 4-9 4.16 Demographics, Minority, and Disadvantaged Populations ............................................ 4-9 4.17 Air Quality/Noise/Light ............................................................................................. 4-10 4.18 Cultural Resources ..................................................................................................... 4-10 4.19 Status of Operation and Maintenance ......................................................................... 4-12 4.20 Hazard Classification ................................................................................................. 4-12 4.21 Potential Failure Modes ............................................................................................. 4-12 USDA- NRCS Page iv January 2013 Kimley-Horn and Associates, Inc.
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Powerline Flood Retarding Structure
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Signal Butte Rd Meridian Rd Ironwoo
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POWERLINE FRS TYPICAL SECTION
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Ironwood Rd Gantzel Rd Mountain Vie
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Figure 22 Figure 21 - Conceptual Mu
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K:\PHX_WaterResources\91131019\CADD
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K:\PHX_WaterResources\91131019\CADD
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Exhibit A-2 - Emergency Spillway Di
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Price Price Price Dobson Alma Schoo
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Powerline, Vineyard Road and Ritten
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