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https://hdl.handle.net/11681/36434Full metadata record
| DC Field | Value | Language |
|---|---|---|
| dc.contributor.author | United States. Army. Corps of Engineers. Memphis District. | - |
| dc.date.accessioned | 2020-05-01T15:43:05Z | - |
| dc.date.available | 2020-05-01T15:43:05Z | - |
| dc.date.issued | 2011-02 | - |
| dc.identifier.uri | https://hdl.handle.net/11681/36434 | - |
| dc.description | Environmental Assessment / Finding of No Significant Impact | - |
| dc.description.abstract | In the early 1970’s, the Corps of Engineers realigned the Cache River from the mouth of Bayou DeView to its confluence with the White River near Clarendon Arkansas. This channelization isolated portions of the historic Cache River because plugs were placed in the upstream openings of at least six meanders, thereby changing them from flowing river into standing backwater. This portion of the river lies partially within the Cache River National Wildlife Refuge, an internationally recognized wetland of importance, and a major portion of the Mississippi Flyway. The purpose of this study is to determine the feasibility of restoring riverine conditions to isolated meanders located within the lower reach of the Cache River. The return of riverine flow to the historic meanders would restore aquatic habitat within the area. The scope of the study consists of analyzing alternatives to restore flows in up to six meanders cut off by the original flood control project. Various alternatives were considered, and a recommended plan was determined. In compliance with federal policy, a national ecosystem restoration plan was identified that would restore all six cut-off meanders. However, due to funding issues, the recommended plan is a locally preferred plan that restores the upper three meanders. | en_US |
| dc.description.sponsorship | United States. Army. Corps of Engineers. | en_US |
| dc.description.tableofcontents | INTRODUCTION .............................................................................................................. 7 Background and Purpose of Report ................................................................................ 7 Project Location .............................................................................................................. 7 Project Authorization and Scope .................................................................................. 10 General Project Planning .............................................................................................. 10 Previous Authorizations and Pertinent Federal Studies and Actions ............................ 12 INVENTORY AND FORECAST OF RESOURCE CONDITIONS ............................... 15 Setting ........................................................................................................................... 15 Land Use and Vegetative Cover ............................................................................... 15 Geology and Soils ..................................................................................................... 15 Climate and Hydrology ............................................................................................. 16 Existing Conditions of Resources ................................................................................. 16 Wetlands .................................................................................................................... 17 Fish and Wildlife ....................................................................................................... 17 Threatened and Endangered Species ........................................................................ 18 Cultural Resources.................................................................................................... 18 Socioeconomic Resources & Human Use ................................................................. 18 Hazardous, Toxic, and Radioactive Waste ............................................................... 18 Future Without Project Conditions ............................................................................... 19 IDENTIFICATION OF PROBLEMS AND OPPORTUNITIES ..................................... 20 Problems ....................................................................................................................... 20 Opportunities ................................................................................................................ 20 Planning Goals and Objectives ..................................................................................... 21 Planning Constraints and Considerations ..................................................................... 23 Potential Management Measures .................................................................................. 24 FORMULATION OF ALTERNATIVE PLANS ............................................................. 25 Alternative 1 – Earthen plug removal with no closure placement ............................... 25 Alternative 2 – Earthen plug removal with closure placement .................................... 25 Alternative 3 – Meander Restoration by Plug Removal and Filling of the Channelized Reach ............................................................................................................................ 26 Alternative 4 – Culvert Installation through Earthen Plugs with Closure Placement .. 26 EVALUATION OF ALTERNATIVE PLANS ................................................................ 27 Screening of Alternatives .............................................................................................. 27 Refinement/Optimization of Alternative 2 ................................................................... 31 Technical ................................................................................................................... 31 Optimization ............................................................................................................. 32 Ecosystem Outputs of Alternatives ............................................................................... 33 Real Estate Considerations of Alternatives ................................................................... 34 Relocations .................................................................................................................... 35 Cost of Alternative Plans .............................................................................................. 35 Identification of the National Ecosystem Restoration Plan .......................................... 38 LOCALLY PREFERRED PLAN (LPP)_DEVELOPMENT AND DESCRIPTION ...... 40 Identifying an LPP ........................................................................................................ 40 Formulation of LPP Scenarios ...................................................................................... 41 Cost Effectiveness Analysis for LPP Scenarios............................................................ 42 SELECTION OF RECOMMENDED PLAN ................................................................... 45 Description of the LPP .................................................................................................. 45 Costs and Cost Apportionment of the Recommended Plan .......................................... 48 SUMMARY OF EFFECTS .............................................................................................. 51 Authorized Flood Project .............................................................................................. 51 Wetlands ....................................................................................................................... 51 Fish and Wildlife........................................................................................................... 51 Threatened and Endangered Species ............................................................................ 52 Cumulative Impacts ...................................................................................................... 52 Cultural Resources ........................................................................................................ 52 Socioeconomic Resources and Human Use .................................................................. 53 Probable Adverse Environmental Impacts Which Cannot Be Avoided ....................... 53 Compliance with Environmental Quality Statutes ........................................................ 53 Relationship of the Proposed Activity to Other Planning Efforts ................................. 54 Locally Preferred Plan .................................................................................................. 54 OPERATIONS, MAINTENANCE, REPAIR, REHABILITATION, AND REPLACEMENT ............................................................................................................. 55 PERFORMANCE MONITORING AND ADAPTIVE MANAGEMENT ...................... 56 RISK AND UNCERTAINTY .......................................................................................... 57 CONSTRUCTION METHOD .......................................................................................... 58 FUNDING AND CONSTRUCTION SCHEDULE ......................................................... 59 PLAN IMPLEMENTATION ........................................................................................... 60 DIVISION OF PLAN RESPONSIBILITIES ................................................................... 61 COST-SHARING REQUIREMENTS ............................................................................. 64 VIEWS OF NON-FEDERAL INTERESTS ..................................................................... 65 FINANCIAL CAPABILITY ............................................................................................ 66 CONCLUSIONS............................................................................................................... 67 RECOMMENDATIONS .................................................................................................. 68 Appendix A: Plates Appendix B: Correspondence Appendix C: Habitat Reports Patterns of Larval Fish in a Bottomland Hardwood Wetland (Killgore and Baker, 1996) Benefits to Fish and Aquatic Habitat (Killgore and George, 2009) Evaluation of Mussel Habitat Improvement (Payne and Farr, 2009) Appendix D: Hydrology and Hydraulics Micro Model Hydraulics, Hydrology, and Sedimentation Appendix E: Civil Design (Quantities Calculations) Appendix F: Cost Engineering Parametric Estimates Operations and Maintenance Appendix G: Not Used Appendix H: Economics Appendix I: Real Estate Appendix J: Cultural Resources Communication Appendix K: Locally Preferred Plan - H&H Write up - Economic Analysis for LPP - Civil Design Quantities for LPP - Cost Information o Cost Appendix Writeup o Parametric Estimate o MII Detailed Cost Estimate for LPP o Operations and Maintenance o Rock Quantity Sheets o Construction Schedule | - |
| dc.format.extent | 396 pages / 23.79 MB | - |
| dc.format.medium | PDF/A | - |
| dc.language.iso | en_US | en_US |
| dc.publisher | United States. Army. Corps of Engineers. Memphis District. | en_US |
| dc.rights | Approved for Public Release; Distribution is Unlimited | - |
| dc.source | This Digital Resource was created in Microsoft Word and Adobe Acrobat | - |
| dc.subject | Restoration ecology | en_US |
| dc.subject | Wetlands | en_US |
| dc.subject | Cache River (Ark.) | en_US |
| dc.subject | Environmental management | en_US |
| dc.subject | Meandering rivers | en_US |
| dc.title | Lower Cache River, Arkansas, Section 1135 Project, Detailed Project Report : Finding of No Significant Impact and Environmental Assessment | en_US |
| dc.type | Report | en_US |
| Appears in Collections: | Environmental Documents | |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| Lower Cache River Section 1135 Project EA_2011.pdf | 23.79 MB | Adobe PDF |  View/Open |