About the Centennial Water Supply Project

/About the Centennial Water Supply Project
About the Centennial Water Supply Project 2018-05-01T09:27:56+00:00


The Centennial Water Supply Project would provide water to homes/farms in Nevada and Placer counties and offer a recreation area.

Using a site first identified by NID’s chief engineer in 1926, the proposed project extends upriver from just above Combie Reservoir for six miles to a point west of Colfax.

The reservoir would have an anticipated water depth of 255 feet and height of 275 feet. It would have a capacity of 110,000 acre-feet of water (an acre-foot of water equals about 326,000 gallons, or enough water to cover a football field 1-foot deep, and meets the annual indoor and outdoor needs of one to two households).

The proposed project would provide a range of economic, environmental, and social benefits, including flood control, water supply, recreation and wildlife habitat.

Specific environmental benefits will be:

  • enhanced groundwater recharge0017
  • flows from the reservoir for species protection
  • enhanced carbon sequestration
  • a six-mile-long firebreak
  • an improvement in the overall health of the regional watershed
  • enhanced water resources to support local food production
  • cold water for downstream river systems
  • increased habitat for local species

The lake will provide an opportunity for both a recreational activity and wildlife habitat.

Low-impact public recreational opportunities would include:

  • pedestrian trails
  • swimming
  • kayaking
  • 5 mph maximum speed on the reservoir

Project Map