River WA

Black Slough

Washington • 48.7596, -122.1901

Length

6 mi

10 km

Elevation

1,519′ → 230′

1,289 ft drop

Stream Order

4

Medium River

Slope

3.88%

204.9 ft/mi

Drainage

8 mi²

21 km²

Avg Flow

-- cfs

0.9 mph velocity

Path to Mouth

44 mi

71 km to ocean

Classification

Tributary

Mid-reach

Elevation Profile

Water Quality

Data from EPA Water Quality Portal (USGS, EPA, state agencies).

EPA WQP MyWaterway

Data from USGS & NOAA for informational purposes only. More