1999-099-WADE PARK SURFACE WATER RUNOFF POLLUTION AND FLOOD MITIGATION PROJECT

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vu. PROJECT DESCRIPTION AND LOCATION Project Location: CITY Paris COUNTY Lamar County TxDOT DISTRICT(S) Paris District Office Projecl Limits: Wade Park Detailed Scope of Work: DESCRIPTION: This project provides an important impact on the surface transportation system. The project is a stonn water sedimenlation and pollution mitigation basin. It serves an 86 acre drainage basin, including heavily traveled F.M. 195 and 251h N.E., a City of Paris collector street. The design objectives for this project require that it be safe, low maintenance. hydrologically sound, efficient and aesthetically pleasing. The sedimentation basin will serve as urban runoff pollution mitigation during wet periods of the year, yet be available as park land during dry periods. The use of native shrubs, plants and trees and a minimum of concrete, will allow the area to serve as urban wildlife habitat, and greatly enhance the aesthetic quality of the park. Required construction activities include earthwork for a stonn water detention and sedimentation pond, 4.5 feet in depth, 250 feet in length and 200 feet in width. The south end of the structure will have a compacted embankment, 12 feet in width, with an 18" concrete outlet pipe at the base of the embankment. An emergency overflow will be located at the top of the embankment. The pond itself will be grass lined, and the perimeter will include decorative landscaping using native shrubs, trees, and filter grasses. Cattails will be planted near the inlet for filtration. To facilitate reduction of volalile organic conlaminants, and increase dissolved oxygen concentration, a cascade aerator inlet will be followed by fountain aeration equipment, and a ''wet pond". A gabion dike will be constructed inside the 'basin, to route the flow in an inverted "c" shape, allowing further settling of pollutants. Other required activities include relocation of a sanitary sewer main, removal of an abandoned wading/swimming poo~ and construction of a trash screen al the inlet to the pond, to prevent unsightly build-ups of trash and debris. No land acquisition (site or permanent easements) is necessary, since this is a City park. LOCATION: Wade Park is one block north of Lamar Avenue (U.S. Highway 82), and one block east of 20lh N.E. (F.M. 195). Nearby facilities include several apartment complexes, duplexes, a nursing home, restaurants, businesses, car wash and single family housing. The site is visible from F.M. Highway 195 (20lh N.E.). The park contains a variety of recreational activities, including playground equipment, picnic areas, pavilion, and others. Attached project location information includes site photographs, a proposed construction site plan, a property map, drainage basin map, and a general location map. 3