Alamosa River Watershed Plan

• Document ID: 0001
• County: Rio Grande
• County: Conejos
• County: Costilla
• County: Saguache
• Stream Name: Alamosa River
• Basin: Rio Grande
• Sub-Basin: Alamosa-Trinchera 13010002
• Water Division: 3
• Title: Alamosa River Watershed Restoration Master Plan and Environmental Assessment
• Date: 7/1/2005
• Prepared For: CWCB
• Prepared By: MWH
• Watershed Pro - Doc Type: Planning Report

3.11 Biological Resources ............................................................................................................................. 3-59
3.11.1 Fish-Stocking Programs Throughout ~Xlatershed .................................................................................................. 3-59
3.11.2 Construction of Fish Barriers to Protect Native Trout ......................................................................................... 3-60
3.11.3 Conservation Easements ............................................................................................................................................ 3-61
3.12 Lost Agricultural Uses ..........................................................................................................................3-62
3.12.1 Ditch Headgate Consolidation .................................................................................................................................. 3-62
3.12.2Replacement ofDitch Headgates with Corrosion Resistant i~laterials ................................................................ 3-64
3.13 Lost Recreational Uses .........................................................................................................................3-64
3.13.1 Improve Public Access to Terrace Reservoir .......................................................................................................... 3-64
3.13.2Accessing Main Stem of River Across Private Lands ............................................................................................ 3-65
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3.14 Studies and dministrative ctivities ................................................................................................. 3-66
3.14.1 Funding for Citizen Group to Help Implement and Monitor the Master Plan ................................................. 3-66
3.14.2 Site Specific Probable Maximum Flood (Pi~IF) Study ........................................................................................... 3-67
3.14.3Ice Jam Flooding Study .............................................................................................................................................. 3-67
3.14.4 Capulin Flood Hazard Mitigation Plan .................................................................................................................... 3-67
3.14.5 Dewatering Management Plan for Terrace Reservoir ............................................................................................ 3-67
3.14.6Terrace Reservoir Sediment uali Stud 3-69
Q tY Y ..............................................................................................................
3.14.7 Ground Water Monitoring Plan ................................................................................................................................ 3-69
3.15 Scoring and Ranking of Projects .........................................................................................................3-69
Section 4.0 -Alternatives and Preferred Plan ..............................................................................4-1
4.1 Development of ~Iatershed Restoration lternatives ....................................................................... 4-1
4.1.1 Project Rank Alternative .............................................................................................................................................. 4-1
4.1.2 Watershed Objectives Alternative .............................................................................................................................. 4-2
4.1.3 No Action ~-~lternative .................................................................................................................................................. 4-3
4.1.4 Trustee Preferences Alternative .................................................................................................................................. 4-4
4.2 Evaluation of Impacts of ~Xlatershed lternatives .............................................................................4-4
4.2.1 Project Priority Comparison ........................................................................................................................................ 4-4
4.2.2 Project Benefits and Uncertainties ............................................................................................................................. 4-5
4.3 Preparation of Preferred lternative .................................................................................................... 4-7
4.4 Preferred Restoration lternative ......................................................................................................... 4-9
4.4.1 Funding for Alamosa River Foundation to Help Implement and Monitor the Master Plan ........................... 4-11
4.4.2 Instream Flow Projects .............................................................................................................................................. 4-12
4.4.3 Stream Restoration and Vegetation Projects ........................................................................................................... 4-14
4.4.4 Riparian Buffer Zone ................................................................................................................................................. 4-16
4.4.5 Sediment Trap Pilot Project with Water Quality Bi~~II's on Alum Creek ............................................................ 4-16
4.4.6 Reclamation of Pass-ale-By ~line ........................................................................................................................... 4-17
4.4.7 Easements .................................................................................................................................................................... 4-17
4.4.8 i~lainstem Lake for Water Quality ............................................................................................................................ 4-18
4.4.9 Increased Access to Terrace Reservoir .................................................................................................................... 4-18
Alamosa River Watershed Restoration Master Plan and Environmental Assessment Page iv