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Donnell & Allred, Inc. was hired by WYDOT to design the reconstruction of
West Broadway Street in Thermopolis including the intersection with 6th
Street. The project presented many challenges that were overcome to provide
an economical design that met the needs of all involved.
WYDOT felt there would be considerable public interest in the project so they
asked us provide artistic renderings of the intersection and retaining wall
showing before and after scenarios. To improve visibility and sight distance
at the intersection WYDOT needed to eliminate a median one block west of the
intersection that had been there for many years. We used our GEOPAK road
design software to generate the new pavement section without the median in
this area. We then overlaid it on a digital photo and touched it up in a
graphics program. These were used to help the public understand and visualize
the impacts that the new construction would have on the aesthetics of the
roadway.
Other design challenges included lowering the grade of the roadway about 1
foot down Old School Hill to allow better drainage and sight distance at 8th
Street, providing new storm sewer up to 9th Street where the roadway sloped
at about 7.5%, incorporating a 4 foot retaining wall along Old School Hill to
maintain slope stability and designing a new intersection layout with
bumpouts on the east side.
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