Projects Landscape Architecture & Planning

Main Street Underpass at Grand Trunk Western Railroad Grade Separation Study and Gateway Design

Mishawaka, Indiana

DLZ provided railroad, highway and utility design engineering, landscape architecture, survey, right-of-way engineering, environmental services, and construction inspection services for the north-south corridor grade separation study of arterial routes and gateway into the Downtown District of Mishawaka.

DLZ gathered existing railroad and highway traffic and accident data, utility and topographic data, and right-of-way and environmental data from governmental agencies and other sources. Preliminary underpass and overpass designs were prepared and the physical and environmental impacts of each were studied. After completion of these analyses, design development and construction documents were completed for the final preferred alternative.

In addition to the new railroad bridge, temporary railroad runaround, and approximately 2,200’ of roadway construction, the DLZ Landscape Architecture Group addressed aesthetic site aspects through studying the adjacent neighborhood character, similar local transportation projects, and merging the functional engineering design with an opportunity for community beautification. The large expanse of retaining walls required for the project were constructed with cast-in-place concrete, cantilever retaining wall with aesthetic facing panels and modular block retaining walls. Other streetscape elements included alternative pavements and decorative rail, gates and fencing to complement the character of two adjacent historical cemeteries. DLZ also developed plans for irrigated landscape plantings to withstand the roadway conditions and soften the impact of the new construction along the new Main Street corridor.