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INTRODUCTION Burke Truck, located in the Town of Burke is requesting a change in zoning for expansion of their current facilities . This stormwater management report has been prepared to comply with the Town of Burke Stormwater Runoff Control Ordinance . vomit STORMWATER MODELING Currently, a major drainageway cuts through Burke Truck which conveys upstream runoff from a 544 acre regional watershed. A MD prior study by Mead and Hunt developed a proposed ditch cross section and culvert sizes for future improvements to said drainageway. In order to prevent on-site runoff from discharging into this regional waterway, an aqueduct will be constructed over the ditch to convey runoff from the eastern portion of the property to a retention area at the west end. "Urban Hydrology for Small Watersheds" TR-55 was used to determine runoff and detention quantities for Burke Truck' s on-site stormwater. All on-site stormwater runoff will enter one of two existing retention areas; one at the southeast corner and a gravel pit at the west end of the property. Infiltration, which provides water quality benefits, will be the main method of release from both retention areas . RESULTS Stormwater runoff from the watershed at the southeast corner will drain into an existing retention area that has adequate volume to handle a 100 year storm event . An emergency overflow pipe will be installed at an elevation of 72 . 0 to prevent stormwater from entering an adjacent house with a lower level elevation of 75 . 37 . Runoff that drains west will be conveyed via the aqueduct and subsequent ditch to an old gravel pit which was mined for sand. According to the Dane County Soil Survey, the soil type is Dresden sand and gravel with a high permeability rate allowing for rapid infiltration. In the event this gravel pit would fill up and overtop, the water will run further west and eventually into the Towns detention ponds . 1