• Concrete

    Managing our Waste Stream

    People rarely think of rainwater as an environmental problem unless it is somehow related to climate change and new precipitation patterns. However, stormwater runoff is responsible for heavily polluted water bodies, flooding, and thermal pollution of sensitive waters. These consequences can have larger impacts on the integrity of natural resources and their ability to provide habitat for wildlife. Consequently, U.S. law requires that non-point source water pollution be regulated through the National Pollution Discharge Elimination System (NPDES) program. Maintaining the integrity of the watershed is Carleton’s responsibility given the water quality regulations that exist.

    At Carleton, stormwater pipes conduct water from buildings, parking lots, and concrete sidewalks into a small group of water bodies, including the Cannon River, Spring Creek, Lyman Lakes, and a couple stormwater retention ponds located on or near campus. As Carleton moves forward with its campus expansion plans (the Arts Center and the new dormitory) storm water management becomes increasingly important. How will the college handle increased runoff associated with new impermeable surfaces? How will we maintain the integrity of water in our local watershed? Fortunately, there are ways to deal with stormwater runoff. Green roofs and permeable pavement are two green designs that increase natural drainage and filtration, reducing the impact of large inputs of stormwater.

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