Transportation Projects


Mountrail County Route 7 - Phase I & II

Jct US Hwy 2 to Burke County Line near Powers Lake, ND

Reconstruction of County Roadway
Services Provided
  • Topographic Survey
  • Environmental Document for Phase II
  • Geometric Layout Corrections
  • Coordination with Utilities
  • Right of Way Plat Preparation
  • Right of Way Acquisition
  • Hydrologic and Hydraulic Analysis
  • Signing/Marking
  • Work Zone Traffic Control Layout
  • Construction Administration/Observation
  • Construction Staking
 
Overview

Apex Engineering Group provided the Final Design, Bid Documents, Right of Way Platting, Supplemental Survey and Construction Engineering on 16.8 miles of County Route 7 in Mountrail County. 

Phase I was completed in 2013 which covered the first 2.3 miles  north of US Highway 2 to 93rd Avenue NW. Phase II included the remaining 14.5 miles to the Burke County Line near Powers Lake. Phase II was originally designed to be bid and built over two construction seasons; however, the contractor was able to complete all the grading and paving in 2014 with minor items remaining in 2015. 

Project Details

The design consisted of reconstructing the existing 24-foot wide gravel "mucker" road to a 28-foot wide, hot bituminous pavement roadway with 3-foot aggregate shoulders.  A geotechnical investigation was performed to ensure the design pavement and base section could withstand the rapid increase in truck traffic related to the recent oil activity in this area of the county. Phase I of County Route 7 includes a large rail loading facility for gas and oil, which posed a challenge as the road had to be kept open for traffic while being constructed. The newly paved section was designed for a 55 mph speed limit and required significant corrections to existing vertical curves to improve sight distance. The design also required a hydraulic analysis of the adjacent ditches and contributing watersheds in order to properly size approach and centerline culverts.

 

Construction Costs:

Phase I: approximately $3.7 million

Phase II: approximately $18.0 million