The 1,250-acre Thompson Creek Watershed Restoration is located almost entirely within the City limits of the City of La Vista.It is a significant natural resource in the City, with signature parks and proximity to City Hall.It is an urban watershed, largely residential, but with several large commercial areas.It flows east for 2 miles to a channelized section of Big Papillion Creek.
Thompson Creek experiences typical urban issues/ stressors:
Frequent and significant water level changes resulting from even small storms due to engineered collection and conveyance of stormwater runoff from impervious surfaces;
Deeply-incised channel (7 to 15 ft in areas) experiencing severe bed and bank erosion from volatile flow rates, lack of floodplain storage below a detention basin, and lack of dense-rooting herbaceous vegetation on steep stream banks;
Flooding of park areas with larger storm events that reduces usable areas.
High phosphorus loading, eutrophication and algae blooms due to direct input of untreated stormwater runoff from residential and commercial areas, parking lots and streets;
Poor in-stream aquatic life due to lack of riffle-run features and high frequency of bed and bank scouring events; and
Infrastructure and public and private property damage due to the unstable flow regime of the stream.
The Thompson Creek Watershed Restoration extends from the western headwaters at approximately 90th Street to 66th Street near the Big Papillion Creek.The project addresses the issues and stressors through a holistic, sustainable design, building on past efforts and investments.