9587

• UCREFRP Catalog Number: 9587
• Author: Ayres Associates.
• Title: Environmental Permitting Services - Elkhead Reservoir and Yampa River Basin, Colorado.
• USFW Year: 1997.
• USFW - Doc Type: Ft. Collins, CO.
• Copyright Material: NO

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Laramie River Hydraulic Review, Analysis and Improvement Design

City of Laramie
Laramie, Wyoming

The City of Laramie, Wyoming, is planning greenbelt improvement in the Laramie River
floodplain. The city was concerned about potential changes in hydraulic capacity of the river
and developing a greenbelt master plan that is compatible with floodplain processes. The study
included geomorphic, hydrologic, hydraulic, and sediment transport investigations and identified
needed modifications to the prior greenbelt plans developed without consideration of these
factors. The investigations concluded that this Laramie River reach is stable, except near the
confluence of a minor tributary where aggradation has resulted in loss of hydraulic capacity.
Because this process is expected to continue, a monitoring program was developed to identify
the future problems and improvements. An unexpected finding of the project is that the
previous Flood Insurance Study for this area needs to be revised due to improvements in
hydraulic analysis procedures.

Noteworthy Features of this Job

· Project completed 14% under budget
· Reduced O&M costs of future greenbelt improvements
· Cost effective channel monitoring program developed
· Improved Flood Insurance Study

Why is this Job Relevant?

· Project involved hydrology, river hydraulics, and erosion/sedimentation components
· Alternative identification and evaluation was performed
· Resource management issues along the river corridor were complex and involved
multidisciplinary coordination