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- Bridges, Culverts, & Multiple Openings
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- City, County, State, & FEMA Approvals
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WEI has modeled floodplains in mountain streams, flat valleys, and on alluvial fans, and has prepared approximate floodplain and detailed floodplain and floodway mapping. Models have been in wildland, rural, and urban settings. Gerald Williams, owner of WEI, has taught sessions and whole day long workshops on floodplain engineering, and is an ASFPM certified floodplain manager. WEI performs steady and unsteady 1-dimensional analyses, and through association, 2-dimensional analyses as well.
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Mill Creek Floodplain Analysis
(CLOMR), Moab, CO
Performed hydraulic analyses,
delineated floodplains and
floodway in breakaway channels
on an alluvial fan, and submitted
Conditional Letter of Map Revision
to FEMA. Involved 5 bridges and
116 cross sections.
Fruita Stormwater Management
Master Plan, Fruita, CO
Prepared base mapping, provided
stormwater analyses & master plan.
Includes 100 & 500 year floodplain
analyses on Little Salt Wash
involving 9 bridges and 110 cross
sections.
7th St. Bridge, Glenwood Springs, CO
Performed HEC-2 analysis through
river channel for proposed 7th Street
Bridge over the Roaring Fork River.
Leach Creek Floodplain Delineation,
Mesa County, CO
Evaluated and established floodplain
delineation and water surface elevations
for two study reaches of Leach Creek
involving several bridge crossings
under existing and proposed conditions.
Bennett's BBQ Restaurant, Grand
Junction, CO
Evaluated impacts of proposed
improvements within a floodplain.
Obtained project approval from City
NFIP coordinator.
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City-Wide Floodplain Determination and
Masterplan, Central City, CO
Performed hydrological and hydraulic
study which assessed existing conditions
and delineated floodplain areas for the
entire City, prepared proposed condition
floodplain maps, and prepared application
for a Letter of Map Revision (LOMR).
CWCB and FEMA were reviewing agencies.
Fortuna Wash Bridge, Yuma County, AZ
Analyzed runoff from a 23 square mile area
and hydraulics through a proposed county
bridge and existing interstate bridges over
Fortuna Wash.
Fairway Peaks, Flagstaff, AZ
Determined floodplain through a master
planned community involving 2,083 acres.
No Thoroughfare Canyon, Mesa County,
CO
Evaluated floodplain along property and
County road. Later was expert witness in
floodplain litigation.
Elusive Acres, Gila County, AZ
Determined floodplain limits for flows
exceeding 11,000 cfs on mountain stream.
Chili's Restaurant, Grand Junction, CO
Evaluated impacts of proposed
improvements within a floodplain. Obtained
project approval from City NFIP coordinator.
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