MN: US 169

Nominee: Innovative Management – Small Project
US 169 Chisholm Mining Mitigation Project
Chisholm, MN

The risks of abandoned iron ore mine shafts may not seem like a concern for highway engineers, but the Minnesota Department of Transportation knows differently. The Minnesota DOT knew that some of those shafts extended below the freeway, and that a collapse in those aging shafts could damage the road and endanger motorists. The US 169 Chisholm Mining Mitigation project mapped abandoned iron ore mine shafts that ran under the highway, which led to the construction of a “super-strong” section of highway 2-miles-long that could withstand a shaft collapse up to 24-feet wide without endangering the motoring public.

 

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s