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Gross Dam Expansion Project

Sector: Hydro • Location: Boulder, Colorado, United States

Source: The Colorado Sun

Project
Under Construction

The project involves raising the Gross Dam by 130 feet to expand the Gross Reservoir in Boulder County, Colorado. The expansion aims to increase water storage capacity to serve 1.5 million metro residents. The project has faced legal challenges regarding environmental permits and mitigation requirements, with ongoing disputes over filling the expanded reservoir.

Status
Under Construction
Sector
Hydro, Water Supply and Storage, Mass Transit
Location
Boulder, Colorado, United States of America
Updated
22 Jul 2026
Source
The Colorado Sun

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Project Information

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The project “Gross Dam Expansion Project” is an infrastructure initiative in the Hydro sector, located in Boulder, Colorado, United States. Taiyo aggregates data on it from The Colorado Sun.

Participants

Not available for this record.

Status

Original status

under construction

Taiyo status

Under Construction

Taiyo last update

2026-07-22

Contact

Not available for this record.

Description

Description

The project involves raising the Gross Dam by 130 feet to expand the Gross Reservoir in Boulder County, Colorado. The expansion aims to increase water storage capacity to serve 1.5 million metro residents. The project has faced legal challenges regarding environmental permits and mitigation requirements, with ongoing disputes over filling the expanded reservoir.

Original sector

Water

Budget

Location

Country

United States of America (USA)

State

Colorado

City

Boulder

Source

Source

The Colorado Sun

URL

More Details

Record type

Project

Sector

Hydro, Water Supply and Storage, Mass Transit

Article published date

2026-05-31

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