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Halligan Water Supply Project

 Contact Information

 Halligan and NISP

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Reviewing Comments

Public Hearing

You've spoken, and we've heard you.

We received approximately 60 public comment letters or statements on the draft Environmental Impact Statement (EIS) and Conceptual Mitigation Plan. Together, with the U.S. Army Corps of Engineers, we’re evaluating each comment to determine next steps for the final EIS. Stay tuned for a summary of comments later this year.

Comment Summary

State Fish and Wildlife Mitigation Planning Kicks Off

Halligan Reservoir

We kicked off the process for the state Fish and Wildlife Mitigation Plan with Colorado Parks and Wildlife (CPW) in April. This process will develop fish and wildlife mitigation proposals using the impacts identified for our proposed action (enlarging Halligan Reservoir) in the draft EIS, as well as additional impacts identified by CPW. The process is expected to last about one year and will be complete near the time of the final EIS. 

Under Colorado law, fish and wildlife resources impacted by water development projects are a matter of statewide concern, and proponents of such projects are expected to mitigate future impacts of their projects on fish and wildlife resources. Once complete, the City of Fort Collins will seek approval of the CPW Commission and the Colorado Water Conservation Board. Once approved, the Fish & Wildlife Mitigation Plan becomes the official state position on fish and wildlife resource mitigation.  

Process Details

Draft Environmental Impact Statement Released

Draft Environmental Impact Statement Released

The draft EIS for the Halligan Water Supply Project was released Friday, Nov. 22, 2019. This is a critical milestone in the federal permitting process. The EIS describes the project, other water supply alternatives considered and the potential impacts of each. 

The draft EIS is available online and physical copies are available at the following locations:

  • CSU Morgan Library, 1201 Center Ave., Fort Collins, CO 80523
  • Poudre River Public Library District-Old Town Library, 201 Peterson St., Fort Collins, CO 80524
  • Poudre River Public Library-Harmony Library, 4616 S. Shields St., Fort Collins, CO 80526
  • UNC, James A. Michener Library, 14th Ave. and 20th St., Greeley, CO 80639
  • U.S. Army Corps of Engineers, Denver Regulatory Office, 9307 S. Wadsworth Blvd., Littleton, CO 80128

A public hearing was held Jan. 13, 2020, and the comment period closed Feb. 26, 2020, which included a 30-day extension from the Corps.


Conceptual Mitigation Plan Released

Conceptual Mitigation Plan Released

The Conceptual Mitigation Plan for the Halligan Water Supply Project was released Nov. 22, 2019, with the draft EIS. A public hearing was held Jan. 13, 2020, and the comment period closed Feb. 26, 2020, which included a 30-day extension from the Corps.

View Mitigation Plan

Cost Update

Fort Collins Utilities has updated the cost estimate for the Halligan Water Supply Project. Based on information known at this time, current estimates indicate a probable cost of $120 million. However, costs could vary between $100 million to $150 million as the project scope and schedule are more clearly defined. 

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