Archive

Canal Importation Ponds

The largest stormwater project undertaken by the City of Fort Collins since the 1997 flood involved design and construction of $20 million of stormwater improvements in the heart of the City directly upstream of Colorado State University. The project included extensive public outreach, including mailings, open houses, and a project website to educate the public.… Read More »

Lanesboro Dam Design & Construction

Lanesboro Dam is listed on the National Historic Register and is one of the last remaining unmortared limestone arch dams in existence. The 25-foot-tall, 220-foot-long limestone block arch dam needed significant repairs to stop joint leakage, improve structural stability, and restore the Oneota limestone facade. This complex project was funded through a USDA Rural Development… Read More »

Byllesby Dam Spillway Modifications

Ayres provided final design and construction observation for the addition of 80% more spillway capacity to the Byllesby Dam. This high hazard Federal Energy Regulatory Commission (FERC) dam in southeastern Minnesota needed a new spillway with two 65-by-14-foot spillway gates, a new post-tensioned anchor wall, 330 feet of new foundation cutoff walls into bedrock, excavation… Read More »