WSP07204

• File Number: 8240.200.37.J
• Description: Collbran Project
• State: CO
• Basin: Colorado Mainstem
• Water Division: 5
• Date: 6/1/1995
• Author: USDOI/BOR
• Title: Draft Environmental Assessment, Resource Management Plan, Vega Reservoir
• Water Supply Pro - Doc Type: EIS

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2.4.3 Access Management. . . . . . . . . . . . . . . . . . . . . . . . . . , . . . . . . . . . . . . . . . . . . . .. 2-12
2.4.3.1 Reservoir Area Circulation and Access. . . , . , . . . . . . . . . . . . . . . . , .. 2-13
2.4.3.2 Private Land Access ....................................... 2-13
2.4.3.3 Off-road Vehicle Use ...................................... 2-13
2.4.3.4 Cattle Trailing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 2-13
2.4.4 Reservoir Area Management/Operation ................................ 2-13
2.5 No Action Altemative ....................................................... 2-13

2.5.1 Recreation................................................... 0> . .. 2-13
2.5,1.1 Facilities................................................. 2-13
2.5.1.2 Level of Use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 2-14
2.5.1.3 Funding ................................................. 2-14
2.5.2 Natural Resources ................................................. 2-15
2.5.2.1 Water Quality .:.......................................... 2-15
2.5.2.2 Fisheries. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 2-15
2.5.2.3 Vegetation and Wildlife. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 2-15
2.5.2.4 Scenic Quality. .... .. . .. ......... .. . . ... ... ... ........ . ... 2-15
2.5 .2.5 Cultural and Paleontological Resources ........................ 2-15
2.5.3 Access Management. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 2-15
2.5.3.1 Reservoir Area Circulation and Access . .. ...... ..... ... ... .. ... 2-15
2.5.3.2 Private Land Access ....................................... 2-15
2.5.3.3 Off-Road Vehicle Use. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 2-15
2.5.3.4 Cattle Trailing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 2-16
2.5.4 Reservoir Area Management/Operation ................................ 2-16
2.5.4.1 OperationsandManagement................................. 2-16
2.5.4.2 Maintenance. . . . . . . . . . . . . . , . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 2-16
2.5.4.3 Safety................................................... 2-16
2.6 Mitigation Measures. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . , . . . . . . . . . . . . . . . . . . . . . . .. 2-16
2.7 Comparison of Alternatives .................................................. 2-17
2.8 Alternatives Considered But Not Analyzed in Detail .............................. 2-18

3,0 AFFECTED ENVIRONMENT AND ENVIRONMENTAL CONSEQUENCES

3.1 Geology, Soils and Mineral Resources. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 3-1
3.1.1 Affected Environment ............................................... 3-1
3.1.1.1 Geology.................................................. 3-1
3.1. 1.2 Soils... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 3-2
3.1.1.3 Mineral Resources. ... ... .. ... ... . . . ..... ... . . ... ... ... ... .. 3-2
3.1.1.4 Natural Gas Resources ...................................... 3-2
3.1.1.5 Sand and Gravel Resources. .. .. .... .... ...... .. . .. .... .. .. . .. 3-3
3.1.1.6 Mineral Rights and Regulations ............................... 3-3
3.1.2 Effects on Geology, Soils and Mineral Resources. . . . . . . . . . . . . . . . . . . . . . . . .. 3-4
3.1.2.1 Multi-Purpose Emphasis Alternative (Proposed Action) ........... 3-4
3.1.2.2 Recreation Emphasis Alternative. . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 3-4
3.1.2.3 Conservation Emphasis Alternative. . . . . . . . . . . . . . . . . . . . . . . . . . .. 3-5
3.1.2.4 No Action Alternative. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 3-5
3.2 Hydrology and Water Quality. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 3-5
3.2.1 Affected Environment ............................................... 3-5

3.2.1.1 Hydrology ................................................ 3-5
3.2.1.2 Water Quality ............................................. 3-7
3.2.2 Effects on Hydrology and Water Quality. . . . . . . . . . . . . . . . . . . , . . ": . . . . 3-8

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