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

Table 3 -21. Pros and Cons of Upstream Embankment Raise ...................................................................................... 3-29
Table 3 -22. Pros and Cons of Downstream Embankment Raise ................................................................................ 3-30
Table 3 -23. Pros and Cons of Downstream Embankment Raise ................................................................................ 3-30
Table 3 -24. Pros and Cons of Concrete Parapet Walls .................................................................................................. 3-30
Table 3 -25. Pros and Cons of Sediment Removal in Terrace Reservoir ..................................................................... 3-31
Table 3 -26. Pros and Cons of Installing Gated, Multi-Level Tower .......................................................................... 3-32
Table 3 -27. Pros and Cons of Power Generation at Terrace Reservoir ...................................................................... 3-32
Table 3 -28. Pros and Cons of Sediment Deposition Areas in Lower Watershed ..................................................... 3-33
Table 3 -29. Pros and Cons of a Road Management Plan .............................................................................................. 3-34
Table 3 -30. Pros and Cons of Sediment Traps at Tributary Confluences .................................................................. 3-34
Table 3 -31. Pros and Cons of alum Creek Sediment Trap and Lime Addition ........................................................ 3-38
Table 3 -32. Pros and Cons of Treatment of Mine Drainage from Abandoned Mines ............................................ 3-40
Table 3 -33. Pros and Cons of Sulfate Reducing Wetlands on Wightman Fork ........................................................ 3-44
Table 3 -34. Pros and Cons of Lime Injection System on alum Creek ....................................................................... 3-46
Table 3 -35. Pros and Cons of Lake or Reservoir on alamosa Mainstem ................................................................... 3-47
Table 3 -36. Pros and Cons of Conveyance of Tributaries to Area of Alkaline Soils ................................................ 3-50
Table 3 -37. Pros and Cons of Summer Land Application of Acidic Flows ............................................................... 3-51
Table 3 -38. Pros and Cons of Winter Freezing of acidic Flows ................................................................................. 3-52
Table 3 -39. Pros and Cons of Noxious Weed Management in the Upper Watershed ............................................. 3-54
Table 3 -40. Pros and Cons of Noxious Weed Management in the Lower Watershed ............................................. 3-54
Table 3 -41. Pros and Cons of Revegetaton in the Lower Watershed ......................................................................... 3-55
Table 3 -42. Pros and Cons of Grazing Management ..................................................................................................... 3-56
Table 3 -43. Pros and Cons of Stream/Riparian Buffer ................................................................................................. 3-57
Table 3 -44. Pros and Cons of acquisition of Equivalent Resource ............................................................................ 3-58
Table 3 -45. Pros and Cons of Purchase Land Downstream of Wightman Fork ...................................................... 3-59
Table 3 -46. Pros and Cons of Developing Fish-Stocking Programs .......................................................................... 3-59
Table 3 -47. Pros and Cons of Building Fish Barriers ..................................................................................................... 3-61
Table 3 -48. Pros and Cons of Establishing Conservation Easements ........................................................................ 3-61
Table 3 -49. Pros and Cons of Ditch Consolidation ....................................................................................................... 3-64
Table 3 -50. Pros and Cons of Replacing Ditch Headgates with Corrosion Resistant Materials ............................. 3-64
Table 3 -51. Pros and Cons of Improving Public access to Terrace Reservoir ......................................................... 3-65
Table 3 -52. Pros and Cons of Improved Access to Main Stem of the River Across Private Lands ...................... 3-65
Table 3 -53. Pros and Cons of Funding for Citizen Group to Help Implement and Monitor the Master Plan ... 3-66
Table 3 -54. Pros and Cons of Condcuting a Site Specific PMF Study ........................................................................ 3-67
Table 3 -55. Pros and Cons of Ice Jam Flooding Study ................................................................................................. 3-67
Table 3 -56. Pros and Cons of Capulin Flood Hazard Mitigation Plan ....................................................................... 3-67
Table 3 -57. Pros and Cons of a Dewatering Management Plan for Terrace Reservoir ........................................... 3-68
Table 3 -58. Pros and Cons of Terrace Reservoir Sediment Stud
y ............................................................................... 3-69
Table 3 -59. Pros and Cons of Ground Water Study ...................................................................................................... 3-69
Table 3 -60. Weighted Project Scores ................................................................................................................................ 3-70
Table 3 -61. Project Prerequisites and Logical Combinations ....................................................................................... 3-72
Table 4-1. Three Preliminary Watershed Alternatives ..................................................................................................... 4-6
Table 4-2. List of Projects in the Preferred alternative .................................................................................................4-10
Table 4-3. Summary of Environmental Consequences by alternative .......................................................................4-27
Table 5-1. Possible Project Sequencing and Duration of Preferred Alternative ......................................................... 5-4
Table 5-2. Project Potential for NRD Funding ................................................................................................................ 5-6
Table 5-3. Summary of Potential National Funding Sources ......................................................................................... 5-8
Table 5-4. Summary of Potential State and Local Funding Sources .............................................................................. 5-9
Table 5-5. Trustees' Selection Criteria for Potential NRD-funded Projects ............................................................. 5-10
Table 5-6. Implementation Steps for Each Project in Preferred alternative .............................................................5-10
Alamosa River Watershed Restoration Master Plan and Environmental Assessment Page xi