As required in the 2014 Public Works Manual all road approach culverts shall be installed by a Certified Installer in accordance with the Lewis and Clark County Road Approach Permit. More information regarding the permit and the approach permit application can be found at the following link: https://www.lccountymt.gov/cdp/permits/approach-permits.html. All County permits are processed through the Community Development and Planning Department: Room 203; 316 N Park Ave., Helena, MT 59623.
The list of current Certified Installers can be found here:
Community Development and Planning Contact Information
Lewis and Clark County
Community Development and Planning Department
316 N. Park Ave., Helena, MT 59623
Telephone: (406) 447-8374