Environmental Assessment
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Environmental Assessment CONSTRUCTION OF OFFICE FACILITIES AND HIKING TRAILS on TISHOMINGO NATIONAL WILDLIFE REFUGE, JOHNSTON COUNTY, OKLAHOMA 10/13/2017 Prepared By Refuge Staff Tishomingo National Wildlife Refuge Tishomingo, OK TABLE OF CONTENTS: 1.0 PURPOSE OF AND NEED FOR PROPOSED ACTION ALTERNATIVE…………….…………….1 1.1 Introduction: ............................................................................................................................................ 1 1.2 Location: ................................................................................................................................................. 1 1.3 Background: ............................................................................................................................................ 5 1.4 Purpose and Need for Proposed Action: ................................................................................................. 7 1.5 Decision to be Made: .............................................................................................................................. 7 1.6 Regulatory Compliance: ......................................................................................................................... 7 1.7 Public Involvement and Issues Identified: .............................................................................................. 8 2.0 ALTERNATIVES INCLUDING THE PROPOSED ACTION ALTERNATIVE…………………….9 2.1 Alternative A--No Action Alternative: ................................................................................................... 9 2.2 Alternative B— Construction of office facilities at Tishomingo NWR (Preferred) .............................10 2.3 Alternative considered but dismissed from further consideration……………………….......11 3.0 AFFECTED ENVIRONMENT...…………………………………………………………………......11 3.1 Physical Environment: .......................................................................................................................... 11 3.1.1 Air Quality: ........................................................................................................................................ 11 3.1.2 Soils/Geology:………………………...………………..………….………………………………...12 3.1.3 Water Resources and Quality…………………………………………………………………...…...12 3.2 Biological Environment: ....................................................................................................................... 12 3.2.1 Vegetative Communities: ................................................................................................................... 12 3.2.2 Wildlife: ............................................................................................................................................. 12 3.2.3 Threatened and Endangered Species…………………………………………………………….…..14 3.3 Human Environment…………………………………………………………………………………..15 3.3.1 Cultural Resources ............................................................................................................................ 15 3.3.2 Socioeconomic Resources: ................................................................................................................ 18 3.3.3 Public Use/Recreation: ....................................................................................................................... 19 4.0 ENVIRONMENTAL CONSEQUENCES……………………………………………………………22 4.1 Physical Environment: .......................................................................................................................... 22 4.1.1 Impacts on Air Quality:...................................................................................................................... 22 4.1.2 Impacts on Water Quality and Quantity ............................................................................................ 23 4.1.3 Impacts on Soils: ................................................................................................................................ 23 4.2 Biological Environment: ....................................................................................................................... 24 4.2.1 Impacts on Habitat: ............................................................................................................................ 24 4.2.2 Impacts on Wildlife: .......................................................................................................................... 24 4.2.3 Impacts on Threatened and Endangered Species and Special Status Species .................................... 25 4.3 Human Environment: ............................................................................................................................ 25 4.3.1 Impacts on Cultural Resources: ......................................................................................................... 25 4.3.2 Impacts to Socioeconomics:………………………..………………………………………………26 4.3.3 Impacts to Public Use and Recreation………………..……………………………………………26 4.4 Cumulative Impacts……………………………..…………………………………………………….27 4.5 Environmental Justice:………………………………………………………………………………...27 4.6 Indian Trust Assets……………………………………...…………………………………………..…28 4.7 Irreversible and Irretrievable Commitment of Resources………………………...............…………..28 4.8 Summary of Environmental Impacts by Alternative…………………….…………………………….28 5.0 CONSULTATION, COORDINATION AND DOCUMENT PREPARATION:…………………….29 5.1 Agencies and individuals consulted in the preparation of this document…………………………….29 5.2 References:…………………………………………………………………………………………….29 1.0 PURPOSE OF AND NEED FOR PROPOSED ACTION 1.1 Introduction: The U.S. Fish and Wildlife Service (Service) is proposing to construct new office, visitor center and maintenance shop facilities at Tishomingo National Wildlife Refuge (refuge) near Tishomingo, Oklahoma. These facilities will be constructed to replace the Tishomingo headquarters and maintenance shop office facilities that were destroyed during the flood events in 2015. The office/visitor center facility will be approximately 4,585 square feet, and consist of eight individual offices, an exhibit area and a multi-purpose room. The visitor center will be constructed on concrete slabs on grade with turn down or spread footing with a floor elevation approximately 670 feet above sea level. A 20-foot wide concrete driveway will provide access to a parking area for 14 visitors. A bus turnout /RV parking shall be bid by the contactor as an option. A canopied parking area will also be provided for six employees and six government vehicles. City water will be tied to the facility and a lateral line septic system will be installed on site. See Appendix A for office/visitor center floor plan. All built facilities shall meet 2010 ADA standards for accessible design: https://www.ada.gov/2010ADAstandards_index.htm Architectural Barriers Act Accessibility Guidelines – 2006: https://www.access-board.gov/guidelines- and-standards/buildings-and-sites/about-the-aba-standards/aba-standards. The maintenance shop facility will be 3600 square feet and will consist of two offices and a work area. This facility will also be constructed on concrete slabs on grade with turn down or spread footing with a floor elevation of 670.00 feet above sea level. Parking for staff will consist of a canopied parking area. City water and a lateral line septic system will also be installed on site. See Appendix B for maintenance shop floor plan. Additionally, the Tishomingo NWR is proposing the development of 1-4 hiking trails all beginning at the new visitor center. Hiking trails 1-3 would consist of a short, medium and a long trail winding east along Sandy Creek. The long Sandy Creek trail would lead visitors to the northeast towards Sandy Creek then turn south along the creek for approximately one mile; it would then go west across Refuge Road and loop north to connect with the Craven Trail before eventually returning to the visitor center for a total loop length of approximately 2.0 miles. While these trails would make for interesting hikes, two of the three trails eventually drop in elevation and enter areas subject to occasional flooding. For this reason, it is unlikely that all three trails will be constructed but this will be dependent on funding. The fourth trail would take visitors west across the road from the visitor center and would connect with the existing Craven trail. These trails would consist of crushed granite with fines or asphalt on five-foot-wide paths depending on funding. See Figure 1-5 and Appendix C for additional hiking trail information. All built outdoor recreational facilities shall meet the Final Guidelines for Outdoor Developed Areas: https://www.access-board.gov/guidelines-and-standards/recreation-facilities/outdoor-developed- area/final-guidelines-for-outdoor-developed-areas/single-file-version-of-rule This Environmental Assessment (EA) is being prepared to evaluate the effects associated with this proposal and complies with the National Environmental Policy Act (NEPA) in accordance with Council on Environmental Quality regulations (40 CFR 1500-1509) and Department of the Interior (516 DM 8) and Service (550 FW 3) policies. NEPA requires examination of the effects of proposed actions on the natural and human environment. In the following chapters, two alternatives are described and environmental consequences of each alternative are analyzed. 1.2 Location: The 16,464-acre Tishomingo NWR is located within Johnston and Marshall Counties in south central Oklahoma. The refuge is south-southwest of Oklahoma City