Mack Drive/Clapp Street

Project Detailsx

Client: City of Wasilla and MSB

Location: Mat-Su Borough, AK

Year Completed:2015


> Transportation Planning & Design
> Geotechnical Investigation & Design Recommendations
> Environmental Services & Permitting
> Right-of-Way Acquisitions
> Hydrologic & Hydraulic Study
> Public Involvement
> Construction Administration


Project Overview x

The rapid population growth experienced by the City of Wasilla and the Knik-Goose Bay (KGB) area in the early 2000s posed a challenge to the local authorities in terms of transportation infrastructure. To address this issue, the City of Wasilla planned to extend South Mack Drive from near the Curtis D. Menard Memorial Sports Complex to South Clapp Street and upgrade the roadway to a major collector. This project was critical for improving connectivity between the Parks Highway and KGB Road, enhancing access to adjacent residential collectors, and providing traffic relief to downtown Wasilla. It was also a high-priority project for the Matanuska-Susitna Borough (MSB).

HDL’s Transportation Group played a crucial role in the successful completion of the 1.8-mile road extension project, which involved constructing 1.3 miles of new roadway, reconstructing 0.5 miles of the existing South Clapp Street, extending South Mack Drive to the newly constructed South Clapp Street, and adding turn lanes at the entrances to the Curtis D. Menard Memorial Sports Complex. HDL’s design also featured a new fish passage culvert at Lucille Creek, curbs and gutters, a new pathway approximately 2.15 miles long, traffic control, and signing and striping. Additionally, HDL provided right-of-way acquisition services to ensure the smooth execution of the project.

During the construction phase, HDL provided comprehensive construction administration services that included daily site inspections to document progress and material testing.

HDL was simultaneously engaged in the South Clapp Street Realignment and Signalization at KGB Road project, collaborating closely with the Department of Transportation and Public Facilities (DOT&PF), the City of Wasilla, MSB, and local property owners to develop a new, signalized intersection at KGB Road. HDL’s seamless coordination with all stakeholders enabled the timely and cost-effective completion of this critical project. HDL also provided construction administration services for MSB on this project. The successful completion of this project ensured that the new South Clapp Street connection was operational when the signalized intersection opened for traffic.