FLOOD01454

• County: Mesa
• Community: Grand Junction
• Stream Name: Colorado River
• Title: Colorado River Flood Analysis - A Proposal for Engineering Services
• Date: 11/1/1983
• Prepared For: Grand Junction
• Prepared By: Greenhorne & O'Mara, Inc.
• Floodplain - Doc Type: Project

in Jefferson County. The earthen dam was 30 feet high and 1,200 feet long.
Work included all hydrology, flood routing, and analysis of alternative
spillway designs.

. Van Bibber Water Storage Reservoir, Feasibi 1 ity Invest"igation (1980) -
Planning, preliminary design and cost estimates investigating expansion of
the proposed Van Bibber Detention Dam for water supp ly.

. Jensen Dam, Permanent Pool Storage FaciJ ity (1982) - Hydrologic ana'lysis
including flood storage routing for impoundment capacity. Final design of
embankment, spillway, outlet stuctures and final cost estimates and
construction specifications for planned industrial development in Jefferson
County.

. Brunner Reservoir Feasibility Study (1978) - Preliminary design of
reservoir alternatives for water supply, flood storage and a recreational
facility in Broomfield, Colorado.

. Hays Lake Outfall System (1981) - Completed a hydrologic investigation and
preliminary design for a spillway rehabilitation and storm sewer outfall
for a dam in the City of Arvada.

. North Prong Diversion Channel (1980) - Hydrologic and hydraulic analyses,
preliminary and final design of 1.5 miles of a grass-lined diversion
channel including two large culvert drop structures.

Experience of Greenhorne & O'Mara, Inc.

. Hydrologic Reviews, Nationwide Flood Insurance Studies (1977-,1983) -
Greenhorne & O'Mara, In~ serves as a Technical Evaluation Contractor for
the Federal Emergency Management Agency. During the last six years, our
staff has reviewed more than 1,000 flood insul-ance studies and has prepared
more than 15,000 Flood Insurance a,nd Flood Boundary Maps.

. Hydraulic Investigations of Nine Dams (1978) ", Completed hydraulic
investigations for nine water storage impoundments. Included were spillway
capacity evaluations, impoundment capa,city determinat"ions and establishment
of optimum reservoir operation procedures.

. Hydrologic Assessment in Coal Mining Areas (1977) - Assessment of
hydrologic conditions pertaining to coal mining areas and assessment of the
impacts of surface mining on the ground and surface water.

. Gui lford Road Storm Water Management Project, Pr'ince George's County,

1 r,
"