About the Watershed
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.
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