Preserving the Past, Reinforcing the Future: Abutment Stabilization at Menomonie Hydroelectric Plant
Engineering & Construction Innovations, Inc. (ECI) recently completed a critical stabilization and site enhancement project at the Menomonie Hydroelectric Plant on the Red Cedar River in Menomonie, Wisconsin. This multifaceted effort improved both the integrity of the dam structure and the visitor experience—reinforcing essential infrastructure while celebrating the region’s hydroelectric and industrial heritage.
Stabilizing the Structure: Left and Right Abutments
Originally constructed in 1958, the dam’s left abutment relied on a series of concrete grout bags to prevent erosion. After more than 60 years of freeze-thaw cycles, those grout bags had severely deteriorated. ECI installed a soil nail and shotcrete wall system over the top of the existing slope—securing the embankment with a modern solution designed for long-term durability.
To further reinforce the slope, a tangent pile wall with tie-backs was constructed at the toe of the bank using a marine-based access system. The team also enhanced drainage along the slope and placed riprap along the river’s edge to help reduce erosion from future water and weather impacts.
On the right side of the dam, ECI removed and replaced the existing public access stair system and poured a new cast-in-place structural concrete wall, ensuring stability while maintaining public access.
From Steep Bank to Scenic Landmark
At the top of the embankment on the left bank, ECI transformed what was once an inaccessible slope into a welcoming riverfront plaza. The project included:
Refurbishing the original steel fence
Installing decorative handrails and lighting
Removing and replacing an aging wooden Tainter gate display
Adding interpretive signage, a custom steel Tainter gate replica, a bench, and brick paver resurfacing
The centerpiece—a replica of the Tainter gate—honors Menomonie’s contribution to dam engineering. Invented in 1886 by Jeremiah Tainter, an engineer working for the Knapp, Stout & Co. Lumber Company, the curved gate design revolutionized hydroelectric operations. Its use of water pressure to assist with opening and closing is still considered an energy-efficient innovation and remains in use in dam structures around the world.
A Destination for History, Hydropower, and Scenic Views
As captured in a recent WQOW news segment, the newly completed plaza is more than just a construction upgrade—it’s a community asset.
“Let’s make this a destination where people can enjoy the view... and also become educated about the history of this area through Jeremiah Tainter and learn about renewable energies.” — Tony Wtikowski, Project Manager, Xcel Energy Representative. View the full story on WQOW.com
The overlook now invites residents and visitors alike to connect with the river, the city’s past, and the power of hydroelectric innovation—all in one spot.
About ECI
ECI is a premier engineering and construction firm specializing in geotechnical construction, water resources infrastructure, hydro/marine construction, specialty construction, and tunnels & shafts. For 25 years, we’ve delivered high-quality, sustainable solutions tailored to our clients’ unique needs. Learn more about our Leadership Team and our Mission, Vision & Values in the About section.