The City Council approved resolutions awarding two creek bank-stabilization projects to the low bidder, Nagle Construction. Assistant Director of Engineering Kristin Brostrom presented the projects, design work by JEO Consulting Group and the bid results.

Brostrom said the Walnut Creek project, located south of Douglas and near the NW 140th/140 Second Street corridor, received seven bids; Nagle Construction submitted the low bid of $192,586, roughly 30% under the engineer's estimate. The work will use techniques such as bendway weirs, longitudinal stone toe protection and selective slope armoring to stabilize vertical banks and protect nearby infrastructure. Staff recommended scheduling work in winter where possible to meet ecological windows and complete construction by May 2026.

For Gulfview Creek, which feeds into North Walnut Creek, Brostrom said five bids opened and Nagle was the low bidder at $341,880, about 43% under the engineer's estimate. Gulfview Park work includes removing or trimming several dying or fallen trees (staff described leaving stumps in place for habitat), outfall protection and limited trail impacts. Brostrom said plans assume the contractor will repair any trail damage and that staff will work to keep trails open as much as possible; the plans allow for short closures in specific locations.

Brostrom said projects of this type typically require Iowa DNR and U.S. Army Corps permitting for stream work and that JEO handled required modeling. She noted the city has invested about $5.5 million in stream projects since 1999 and has recently increased annual spending on larger projects.

Council approved the recommended award resolutions on voice votes. Staff said both projects had prior public-notice publication in the Des Moines Register and that Nagle Construction had recent experience working on city stream projects.