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Environmental Impact Statement - Moffat Collection System Project

Summary: The Denver Water Board requested a Section 404 Permit (Clean Water Act) from the U.S. Army Corps of Engineers, Omaha District Regulatory Branch to enlarge the existing Gross Reservoir (near Boulder, Colo.) to supply 18,000 acre-feet per year new firm yield of water to its Moffat Collection System. The Corps is the lead federal agency and has been preparing an Environmental Impact Statement since 2003 to analyze environmental effects. Water supplied to the Moffat Collection System is proposed to be diverted from either West Slope tributaries of the Colorado River or from the South Platte River in the Colorado Front Range. Denver Water's preferred project is to enlarge Gross Reservoir in Boulder County to provide storage for the diverted water.

EIS Milestones
Completed 
Publish Notice of Intent to Prepare EIS
Sept. 17, 2003
Public Scoping
Nov. 7, 2003
Publish Notice of Availability of Draft EIS
Oct. 30, 2009
Draft EIS Comments Due
March 17, 2010
Publish Notice of Availability of Final EIS
April 25, 2014

Final Environmental Impact Statement - Moffat Collection System Project

Final EIS Release Date: April 25, 2014

Permit Applicant: Denver Water

FEIS Prepared by: U.S. Army Corps of Engineers, Omaha District Regulatory Branch (the Corps Regulatory Branch is neither a proponent nor opponent of the proposed project).

Colorado libraries and offices where a paper copy of the Final EIS is available for review.

Comments Due: June 9, 2014
No public hearings or public meetings will be held for the release of the Final EIS. 

Submit comments in writing to: 

Rena Brand, Moffat EIS Project Manager
U.S. Army Corps of Engineers, Omaha District
Denver Regulatory Office
9307 S. Wadsworth Blvd.
Littleton, CO 80128

Fax: 303-979-0602
E-mail: moffat.eis@usace.army.mil

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Draft Environmental Impact Statement - Moffat Collection System Project

Draft EIS Release Date: October 30, 2009

Public Comments Due: March 17, 2010

Permit Applicant: Denver Water

Prepared by: U.S. Army Corps of Engineers, Omaha District, Regulatory Branch (the Corps Regulatory Branch is neither a proponent nor opponent of the proposed project).

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Moffat Draft EIS Volume 1
  • Table of Contents
  • Acronyms
  • Glossary
  • References
  • Executive Summary
  • Chapter 1 – Purpose and Need
  • Chapter 2 – Proposed Action and Alternatives

Moffat Draft EIS Volume 2

  • Chapter 3 – Affected Environment

Moffat Draft EIS Volume 3

  • Chapter 4 – Environmental Consequences
  • Chapter 5 – Cumulative Effects
  • Chapter 6 – Consultation and Coordination

Moffat Draft EIS Volume 4

  • Appendix A - Technical Memoranda – Purpose and Need Support
  • Appendix B - Alternatives Screening Information
  • Appendix C - Advanced Water Treatment Process Diagrams and Site Plans
  • Appendix D - Construction Information
  • Appendix E - Surface Water Resources
  • Appendix F - Soils within the Project Area
  • Appendix G - Biological Resources

Moffat Draft EIS Volume 5

  • Appendix H - Hydrologic Data and Platte and Colorado Simulation Model (PACSM) Output

Moffat Draft EIS Volume 6

  • Appendix I - Air Quality Data
  • Appendix J - Public Notices
  • Appendix K - Preliminary Clean Water Act Section 404(b)(1) Guidelines Analysis
  • Appendix L - Draft Programmatic Agreement
  • Appendix M - Mitigation Plan

Moffat Draft EIS - Public Hearing Transcripts and Display Boards

Moffat Draft EIS – Index of Comments Received on the Draft EIS