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

Figure 2-105. Poor River Condition- San Jose Ditch No. 1 ......................................................................................2-158
Figure 2-106. Dam Constructed of Marginal Materials -Cristobal Rivera Ditch ...................................................2-158
Figure 2-107. Photo of Terrace Sediments Flushed into Head Overflow #5 Ditch ..............................................2-160
Figure 2-108. Photo of damage to culvert after exposure to Alamosa River Water ...............................................2-161
Figure 2-109. Alamosa Watershed Recreation Resources Map .................................................................................. 2-166
Figure 3 -1. Map of Segments/Subwatersheds Most Impacted by Human Activities ................................................. 3-4
Figure 3 -2. Watershed Areas with Observed Erosion Problems ................................................................................. 3-11
Figure 3 -3. Fish Habitat Features ...................................................................................................................................... 3-12
Figure 3 -4. Stream Restoration Detail .............................................................................................................................. 3-13
Figure 3 -5. Bendway Weir Layout ..................................................................................................................................... 3-14
Figure 3 -6. Instream flow project ...................................................................................................................................... 3-17
Figure 3 -7. Schematic of Trade of Direct Flow Right for Storage for Instream Flow ............................................. 3-20
Figure 3 -8. Potential Reservoir Sites ................................................................................................................................. 3-23
Figure 3 -9. Two Methods for Artificial Recharge ........................................................................................................... 3-24
Figure 3 -10. Multi-level Tower ......................................................................................................................................... 3-31
Figure 3 -11. Artificial Cutoff Channel .............................................................................................................................. 3-33
Figure 3 -12. Photo of alum Creek Sediment Fan Being Eroded by Alamosa River ................................................ 3-35
Figure 3 -13. Aerial Photo of Alum Creek Confluence .................................................................................................. 3-36
Figure 3 -14. Photo of Potential area for Settling Pond Upstream of alum Creek Confluence ............................ 3-36
Figure 3 -15. Plan View Schematic of Alum Creek Settling Pond ................................................................................ 3-37
Figure 3 -16. Photo of Sediment Downstream of alum Creek Confluence ............................................................... 3-38
Figure 3 -17. Conceptual Design of Potential Sulfate Reducing Wetlands on Wightman Fork .............................. 3-44
Figure 3 -18. Conceptual View of Lake and Reservoir Options Below Wightman Fork .......................................... 3-48
Figure 3 -19. aerial Photo of alum Creek Confluence .................................................................................................. 3-52
Figure 3 -20. Weed Management ........................................................................................................................................ 3-54
Figure 3 -21. Native Plant Revegetation, Before and after ............................................................................................ 3-55
Figure 3 -22. Cattle Fencing Options ................................................................................................................................. 3-56
Figure 3 -23. Fish Barrier ..................................................................................................................................................... 3-60
Figure 3 -24. Potential Consolidation of Miller, R. Valdez, Rivera, San Jose #1 and #2 Ditches ........................... 3-63
Figure 3 -25. Consolidation of Union, Scand., Morganville, TK Walsh and Flintham Ditches ............................... 3-63
Figure 3 -26. Potential Locations of Coffer Dams Below Terrace Reservoir ............................................................. 3-68
Figure 4 -1. Project Rank Alternative ................................................................................................................................... 4-2
Figure 4 -2. Watershed Objectives Alternative ................................................................................................................. .. 4-3
Figure 4 -3. Trustee Preferences alternative .................................................................................................................... .. 4-4
Figure 4-4. Preferred alternative Project Locations ....................................................................................................... 4-11
Figure 4 -5. Schematic of Trade of Direct Flow Right for Storage for Instream Flow ............................................. 4-13
Figure 4 -6. artificial Cutoff Channel ................................................................................................................................ 4-15
Figure 4 -7. Photo of alum Creek Sediment Fan Being Eroded by Alamosa River .................................................. 4-17
Figure 4 -8. Conceptual View of Small Mainstem Lake Below Wightman Fork ........................................................ 4-18
Figure 5-1. Possible Implementation Sequence of Preferred alternative ..................................................................... 5-3
Alamosa River Watershed Restoration Master Plan and Environmental Assessment Page ix