Gross Reservoir Expansion Project

As a federally permitted project, the purpose, need and environmental impacts of the project have been vetted through almost a decade of research. The U.S. Army Corps of Engineers released the Final Environmental Impact Statement in 2014 that details project mitigation measures and addresses public comment received after publication of the Draft Environmental Impact Statement. Like many water supply projects, there are a number of permits at the federal, state and local level that are needed before construction can begin:

401 Certification

 

  • Also a component of the Clean Water Act of 1972, 401 Certification is a process handled at the state level. In the case of the Gross Reservoir Expansion Project, the Colorado Department of Public Health and Environment is responsible for evaluating the impacts of and ensuring water quality associated with this project.
  • Secured: June 2016

 

Record of Decision and 404 Permit

  • A major responsibility of the U.S. Army Corps of Engineers is administering the permitting program under Section 404 of the Federal Water Pollution Control Act of 1972, also known as the Clean Water Act. Permit review and authorization is a thoughtful and lengthy process that encourages avoidance of impacts, followed by minimizing impacts and, finally, requiring mitigation for unavoidable impacts to the aquatic environment.
  • 404 Permit
  • Secured: July 2017

Federal Energy Regulatory Commission Hydropower License Amendment

  • The Gross Reservoir Dam includes a 7.6 mW hydropower unit, which is licensed for operation by FERC. Under the Federal Power Act, FERC has exclusive authority to license non-federal hydropower projects. The amendment of license process requires that FERC address both the economics and engineering issues and the potential environmental and socioeconomic effects of project development and operation.
  • Secured: July 2020

Latest News / Blog

Have fun, stay safe on the water

May 28, 2021 - TAP - Here’s what to expect when boating, paddleboarding on Denver Water reservoirs this summer. “It’s important to remember that the primary purpose of our reservoirs is to store water for more than 1.5 million people in the metro area,” Ransom said....

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Getting a (big) jump on a healthy environment

May 21, 2021 - TAP - Denver Water completing required stream and habitat improvements years ahead of final go-ahead for Gross Reservoir expansion. “Our No. 1 objective is to do right by our partners, by our customers and by the environment,” said Jeff Martin, project...

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2020 Year-End Report

Last year was unique and required a lot of adaptation but we are proud of what we were able to progress throughout 2020. The 2020 Year-End Report can be viewed by clicking the image below.

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Federal Lawsuit Dismissal Order

April 1, 2021 - Today’s decision is an important step. We will continue working earnestly through Boulder’s land-use process and look forward to beginning work on a project critical to water security for 1½ million people and to our many partners on the Front Range...

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