PORTFOLIO

CONSTRUCTION OVERSIGHT

STH 35 Retaining Wall – Pepin to Hager City

CLIENT

Wisconsin Department of Transportation (WisDOT) Northwest Region

LOCATION

Maiden Rock, Wisconsin | Pierce County

LIMITS

Green Street to Park Street (0.3 miles)

DATES

March 2024 – May 2025

Built

2024 | $3.4 million

KL Contact

Chris Ehlert, PE

Project Details

  • Construction Management
  • Construction Staging & Sequencing
  • Traffic Control Coordination
  • Railroad Coordination & Safety Compliance
  • Public & Stakeholder Coordination
  • Historic Structure Protection
  • Quality Assurance & Material Testing
  • Environmental Protection & Erosion Control
  • Utility Coordination
  • Schedule & Cost Management
  • Specialized Construction Methods (Soil Nail Wall)

This project exemplifies the highest standards of quality, adaptability, and craftsmanship.

Set along Wisconsin’s scenic Great River Road, the STH 35 Retaining Wall Project transformed a constrained and high-profile corridor in Maiden Rock into a safer, more resilient, and visually cohesive environment. The project centered on construction of two retaining walls, including Wall R-47-40, located just feet from the historic Old Creamery Building and adjacent to an active railroad.

Faced with tight site constraints, seasonal tourism traffic, and a major regional event, the project team reimagined the construction sequence to maintain public access and safety without delaying progress. This proactive approach ensured uninterrupted travel along this critical route while keeping local businesses operational.

Wall R-47-40 showcased innovative construction techniques, including a soil nail wall system installed in extremely limited space using specialized equipment. The team executed the work with precision, protecting nearby structures and utilities while delivering a clean, high-quality finish designed to blend seamlessly with the natural bluff landscape.

Beyond structural performance, the project emphasized environmental stewardship and community impact, incorporating erosion control, stormwater management, and careful restoration of the surrounding area.

Completed on schedule and within budget, the project stands as a testament to collaboration, adaptability, and craftsmanship, enhancing both the safety and character of this iconic corridor.

KL Engineering provided the project management oversight for construction services on behalf of WisDOT. The prime contractor was Zenith Tech Inc. and Professional Engineering Services (PES) provided the construction engineering in the field.

  • 2025 Excellence in Construction Award for Small Structure – Wisconsin Department of Transportation (WisDOT)

STH 35 Retaining Wall – Pepin to Hager City [Photos]

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