This project is a 1.9 mile reconstruction and expansion of County Road 61 from Bass Lake Road to I-94/694, through the cities of Plymouth and Maple Grove. Hennepin County selected Bolton & Menk, Inc. to develop preliminary and final plans for this project, which is funded in part by the Federal TEA-21/STP program.

Bolton & Menk's responsibilities included public involvement, data collection and surveys, a project path report, preliminary plan development, a project study report, pavement and foundation design, drainage design and coordination, final design, (including the design of 5 traffic signal systems with traffic optimization control and emergency vehicle pre-emption features), construction plans and contract documents.

All design work and construction plans were prepared utilizing Hennepin County's GPS coordinates and are in metric.

The City of Marshall has been subject to persistent surface flooding due to inadequate storm sewer and surface ditch outlets. Bolton & Menk, Inc. was employed to review the existing drainage facilities within the affected watershed and investigate alternatives for drainage relief.

A comprehensive study of the system, covering the east one-third of Marshall, was performed and included analysis of existing piping and ditches and integration of surface detention to mitigate existing flooding conditions. An integral part of the project was coordination of flood relief for Marshall with downstream County ditch system outlets. The study was completed in 1994 and the project proceeded to design phase in 1996.

Bolton & Menk provided detailed design, public drainage system administration along with providing construction contract administration services.

The Phase I final design included a 20-acre detention basin with 170-acre feet of storage, 3 miles of open ditch, and approximately 2600 feet of 96" and 84" interceptor storm sewer piping.

Bolton & Menk also provided Phase II design services for 54" and 60" interceptor sewers. Design and construction services were coordinated from both our Fairmont and Willmar offices.