Minimizing stormwater impact

Construction crews have minimized the impact of stormwater runoff on creeks and streams throughout construction using best-management practices. The team upgraded 16 existing

The underground storm- water management system will collect water from infiltration trenches along the highway and then slowly discharge it as cool, filtered water into sensitive Rock Creek.

stormwater-management sites to improve watershed conditions in a drainage area of about 4,350 acres, more than five times the size of New York’s Central Park. Ten miles of silt fence encircle the construction area, preventing loose soil from entering streams. Solar-powered stream monitors give the environmental team real-time readings of water-quality conditions. “During major rain events, there would be more staff to make sure the site stayed in compliance,” Bednarik said.

Protecting the ecosystem

Context-sensitive design helped reduce impact to wetlands, streams and wildlife.

Sections of the project were rerouted

to minimize environmental impact. Many ICC bridges over parks and streams were built longer than required to protect the surrounding environment and allow greater clearance for wildlife.

Construction teams also focused directly on stream restoration, wildlife protection and fish-passage creation in stewardship and mitigation programs. These programs will continue to be implemented throughout the project. “For instance, during construction, the area was swept for box turtles, and crews moved them from the construction area to other locations in Montgomery County,” Bednarik said.

Friendly construction

The project teams are good neighbors, too. Lowering the ICC roadway to the ground near existing communities reduces noise and visual impacts. Additionally, the ICC project incorporates bike trails, sidewalks and other public access points to improve the quality of life. An extensive program of landscaping, retaining walls and sound barriers make the ICC fit in better with adjacent communities. “Saving the wetlands, limiting

impacts to streams and environmental stewardship; those things do benefit the public,” Bednarik said. “In the end, there is a lot of benefit for everyone.” g&c

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