Dominant Land Use:
The dominant land uses in this catchment are CICU (commercial/industrial/communications/ utilities), moderate to high density single family residential properties, and secondary roads.
Percentage of Impervious Surface:
39% of the catchment area is impervious
City of South Lake Tahoe
The Tahoe Valley monitoring site is located on the eastern side of Tahoe Keys Blvd just south of California Avenue near the Sky Meadows Condominium complex driveway in South Lake Tahoe, California. This relatively flat catchment lies within the City of South Lake Tahoe and drains the majority of the commercial core around the South Lake Tahoe “Y” including City of South Lake Tahoe designated “D” Street basins and Caltrans right-of-way. Though the Tahoe Valley area comprises roughly 6% of the City of South Lake Tahoe’s total urbanized area, preliminary modeling results estimate that greater than 14% of the City’s fine sediment particle (FSP) load is generated in this catchment due to high flows and dense urbanization. The outfall pipe discharges to a vegetated swale along the northwestern edge of the Sky Meadows property that drains into Pope Marsh and eventually into Lake Tahoe.
This catchment is not slated for registration in the first 5-year term of the NPDES permit, but was chosen as a long-term monitoring site because it represents urban runoff from a highly commercialized area and future environmental improvement projects are likely to focus on this land-use type. Planned improvements include creation of a “Greenbelt” southeast of the “Y” that would include construction of a comprehensive regional stormwater treatment system, upgrades to current stormwater treatment facilities, and restoration of the stream environment zone (SEZ). The Greenbelt concept is being evaluated as part of the Tahoe Valley Area Plan. If funding for the Greenbelt project is secured, monitoring in this catchment would occur during a period when improvements are implemented and would result in both pre- and post-improvement monitoring data. Therefore, this site may provide important information regarding how effective improvements made in the area are at reducing runoff volumes and pollutant loads.