Street Water Quality Options Rick Coldsnow, PE and Craig Wilkening, PE
Rick manages the Western Region Civil and Water Resource Practices for SEH Engineers and Architects. SEH has maintained an office in Wyoming for 13 years and has completed many roadway drainage and building design projects in the state, including the 19th Street project currently under construction in Cheyenne.
Rick is currently based in Denver but has been a licensed engineer in Wyoming since 1991 and managed a consulting office in Gillette for six years. He is past President of both the Wyoming Society of Professional Engineers and the Colorado Society of Professional Engineers. He has been a member of APWA for over ten years.
Craig Wilkening is the Senior Water Resources Engineer for the Denver office of SEH. He is a Professional Engineer and Certified Floodplain Manager with nearly 30 years of experience in drainage, stormwater, and flood control modeling and design. His project history has ranged from single span bridge replacements to projects involving major basin and river systems of hundreds of square miles. Craig has had the opportunity to work on projects for local, national, and international clients. His drainage experience in Wyoming and Montana includes modeling and design for Union Pacific Railroad projects in Cheyenne, Laramie, Green River, and Laurel, Montana, as well as drainage designs for the Laramie River, the Jackson Hole Airport and the 19th Street project in Cheyenne.
Improving Water Quality with Street Reconstruction: Street reconstruction projects are major undertakings. In addition to the cost and impacts to businesses and residents associated with street reconstruction, these projects often raise concerns with state and federal agencies regarding long term water quality associated with the increased pavement and disturbed areas. Land for water quality and detention ponds is often unavailable or extremely expensive in urban areas. Many communities are exploring options to provide water quality treatment within the existing or expanded street right of way. During this presentation Rick will summarize various treatments that his firm has designed to provide water quality treatment along roadways using permeable pavers, street-side bio-swales and street-side landscaped storm water quality structures, also known as “green gutters”. These applications can not only provide water quality treatment prior to discharge to storm sewers, they can also address standing water that can occur when downtown streets with very flat gutter slopes need to be reconstructed while maintaining sidewalk cross slopes that comply with Americans with Disability Acts guidelines. Examples will be provided for several municipalities, including Fort Morgan, Colorado where permeable pavers have been in place on their Main Street for over six years. There will also be discussion of how these facilities can be maintained without breaking maintenance budgets. Rick will also summarize recent Urban Green Infrastructure Guidelines prepared by the City and County of Denver and their consultants to address water quality concerns in urban corridors.