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Cass County committee approves KLJ for preliminary design of County Road 31 Cheyenne River bridge
Summary
The county committee voted to advance KLJ Engineering for preliminary and design work on the County Road 31 (Cheyenne River) bridge project; the structure was closed in mid‑2024 after substructure movement. Engineering will proceed toward an April 7 commission consideration and further negotiations on price.
A Cass County roads committee approved moving forward with KLJ Engineering to provide preliminary and design engineering for the County Road 31 (Cheyenne River) bridge project, with the work to be presented for potential approval at the April 7 commission meeting.
The vote followed a presentation describing why the existing bridge was closed in June 2024 because of severe substructure movement and a noted slip plane in the soils. County staff said inclinometers installed along the alignment confirmed continuing movement and that piers were visibly leaning; one presenter described the current piers as appearing “at about a 30 degree angle.”
The county’s presentation summarized engineering…
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