Gross Reservoir

Gross Reservoir, located in Boulder County, Colorado, is owned and operated by Denver Water. Completed in 1954, the reservoir has a surface area of 440 acres, and the spillway sits at 7,225 feet elevation.[1]

Gross Reservoir
The reservoir in 2014.
LocationBoulder County, Colorado
Coordinates39°56′31″N 105°22′22″W
Typereservoir
EtymologyNamed for Denver Water former Chief Engineer Dwight D. Gross.[1]
Primary outflowsSouth Boulder Creek
Basin countriesUnited States
Managing agencyDenver Water
Water volume41,811 acre⋅ft (51,573,000 m3)
Surface elevation2,222 m (7,290 ft)[2]

The reservoir receives water from the western side of the Continental Divide through the Moffat Tunnel. South Boulder Creek flows out of the 340 foot high dam.

Recreation

The reservoir provides opportunities for fishing (including ice fishing), hiking, canoeing, kayaking, and some camping. No water-contact sports such as swimming or wading are allowed. Only non-motorized boats are permitted — the type that can be attached to the top of a car.[1]

Expansion project

A project to expand the reservoir was approved and began in 2017 with the awarding of a design services contract to Stantec, an engineering consulting firm. Construction on the project, expected to be complete around 2025, will raise the level of the dam by 131 feet (40 meters), resulting in an additional 77,000 acre feet (95,000,000 cubic meters) of water storage capacity in the reservoir and making it the tallest dam in Colorado.[3]

See also
  • List of largest reservoirs of Colorado
  • List of reservoirs in Colorado

References
  1. Denver Water. Gross Reservoir. Viewed 2014-09-22.
  2. "Gross Reservoir". Geographic Names Information System. United States Geological Survey. Retrieved 2014-09-23.
  3. Brennan, Charlie. "Denver firm awarded $13M design contract for expansion of Boulder County's Gross Reservoir". The Boulder Daily Camera. Retrieved 2018-03-09.
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