DEPARTMENT: Transportation
FILE TYPE: Consent Action
TITLE
title
Authorization To Execute Contract Amendment With Alliant Engineering, Inc., For Professional Engineering Services For County Road Retaining Wall Assessments And Final Design of County State Aid Highway 38 (McAndrews Road) Retaining Walls, County Project 97-218
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PURPOSE/ACTION REQUESTED
Authorize the execution of the first contract amendment with Alliant Engineering, Inc., for engineering design services for County State Aid Highway (CSAH) 38 (McAndrews) in the City of Apple Valley, County Project (CP) 97-218.
SUMMARY
To provide a safe and efficient transportation system, Dakota County is proceeding with CP 97-218, which involves the analysis, repair, or replacement of retaining walls along county roadways. Some retaining walls are showing signs of deterioration. This project will evaluate 24 retaining walls to identify and prioritize repair/replacement before wall failure compromises the integrity of the bike/pedestrian trails and roadways.
The County has identified four priority retaining walls along CSAH 38 for final design (Attachment: Location Map). These walls, constructed in 1992, are deteriorating and require either full replacement or a solution with a similar service life.
In addition to CSAH 38, Dakota County is requesting the Consultant to evaluate an additional 20 retaining walls. The evaluation will provide recommendations for corrective action, preliminary cost estimates, and a priority list for repairs. This will help Dakota County plan funding in future Capital Improvement Programs (CIP).
By Resolution No. 23-427 (September 2023), Dakota County authorized a contract with Alliant for the county-wide evaluation and replacement of retaining walls on CSAH 38. Since then, the project scope has evolved due to the complications associated with avoiding significant permanent easement requirements and subsequent damages to the private property, requiring numerous wall offsets, mate...
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