Combined Sewer Separation Master
Plan, Grand Junction, CO
Analyze 3.75 square miles of downtown
Grand Junction for separation of combined
sewers and stormwater management master
plan. Project involved modeling and analysis
of 10 subbasins with approximately 60,000 feet
of pipeline and $12,000,000 worth of
improvements. Masterplan required
coordination with the City, railroad company,
utility companies, and several state and
federal agencies.

Stormwater Management Masterplan,
Yuma County, AZ
Gerald Williams, owner of WEI, was project
engineer on study involving stormwater and
groundwater for an 80 square mile area.
Coordination was required between three
municipalities, county, state, federal and other
agencies. Designed, analyzed, or supervised
work involving 14.6 miles of U.S.B.R. pipe and
22.5 miles of U.S.B.R. open channel drains, 585
drainage basins, 309 catch basins, 19 retention
basins, 36 pumps, 57,144 feet of existing storm
drain pipe, 168,840 feet of proposed storm and
groundwater pipe, and seven bridges.

City-Wide Floodplain Determination and
Stormwater Masterplan, Central City, CO
Performed hydrological and hydraulic study
which assessed existing conditions and
delineated floodplain areas for the entire
City, analyzed effectiveness of various
improvements, and prepared a cost-effective
improvement program, prepared proposed
condition floodplain maps, and prepared
application for a Letter of Map Revision
(LOMR). CWCB and FEMA were reviewing
agencies.