Time lapse of the construction of the Pine Brook Dam:

Owner: Pine Brook Water District, 1903 Linden Drive, Boulder, Colorado, 80304


Dam Type Code: Gravity Concrete Dam

Dam Height: 83 feet (to bottom of excavation)

Dam Height from finished grade: 73 feet

Crest Length: 606 feet (overall including parapet wall)

Crest Length: 571 (not including parapet wall)

Crest Length Visible: 550 feet

Crest Width: 14.13 feet

Reservoir Surface Area: 4.06 acres

Normal Storage Capacity: 100.96 acre feet

Maximum Storage Capacity: 137.36 acre feet (during flood)

Drainage Basin Area: 300 acres

Maximum Outlet Discharge Capacity: 49 cubic feet/second (cfs)

Principal Spillway Capacity: 500 cubic feet/second (cfs)

Emergency Spillway Capacity: 4,100 cubic fee/second (cfs)

Next Downstream City or Town: City of Boulder

Distance to Downstream Town: 1 Mile

River or Stream: Two Mile Creek


  • 32,425 cubic yards of material were excavated.

  • 15,000 cubic yards of soil will be used to create the downstream embankment against the downstream face of the dam.

  • 4,302 cubic yards of conventional concrete were poured for the upstream dam face, the spillway tower & the spillway outlet structure.

  • 34,140 cubic yards of roller compacted concrete were used to construct the main body of the dam.