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Sand Lake
Upper Couderay River Watershed
Data Sources
±0 2 4 61 Miles
WASH
BURN
COUN
TYSA
WYER
COUN
TY
The Stream Power Index (SPI) is a measure of the erosive power of flowing water. SPI is calculated based upon slope and contributing area. SPI approximates locations where gullies might be more likely to form on the land-scape. SPI is calculated using the following equation: SPIi = ln(DAi * tan(Gi)) where SPI is the stream power index at gridcell i, DA is the upstream drainage area (flow accumulation at gridcell i multiplied by gridcell area), and G is the slope at a grid cell i in radians.Tax parcels from the Sawyer County Land Records Department, acquired June 2016. Agricultural Tax Parcels selected by tax assessment attributes indicating agricultural land use. Agricultural land uses on parcels with tax exempt status are not included. Map crafted by Kyle McNair, edited by DouglasMiskowiak. Version 12-09-2016.
BASS LAKE
BIRCHWOOD
COUDERAY
EDGEWATER
HAYWARD
HUNTER
LENROOT ROUND LAKE
SAND LAKE
STINNETT
STONE LAKE
77
70
70
27
Stream Power IndexUpper Couderay River Watershed
Sawyer and Washburn Counties, WI
Project Cooperators
Project Education and Assistance
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Couderay River
Grindstone Creek
SissabagamaCre ek
Osprey
Creek
GrindstoneLake
Lac Courte Oreilles
RoundLake
Sissabagama Lake
WhitefishLake
Agricultural Tax ParcelsCranberry Operators
High ErosionVulnerability
Low ErosionVulnerability
Stream Power Index - Vulnerability to Gully Erosion
Watershed Boundary
County RoadsA
State Roads70
Minor Civil Divisions
County Boundary
Surface WatersStreams & FlowDirection
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Lac Courte OreillesReservation