Blackwater HUC8 10300104
A 4,000 km² sub-basin of the Missouri region in MO. Drought coverage is from the US Drought Monitor (map of 2026-09-01); streamflow classes place each USGS gauge's latest reading against its own day-of-year record.
Health score
83
Healthy
Drought index
5
Abnormally dry
Area in D2+
0%
0% exceptional (D4)
Gauges below normal
0%
of 2 reporting
Median flow
42%
p28 of record
Water assets
1,600
16 springs · 880 wells
USGS gauges (2)
- Blackwater River at Valley City, MO069077006 cfsp27 · normal
- Blackwater River at Blue Lick, MO069080009 cfsp28 · normal
Recent conditions
| Date | DSCI | D2+ % | Gauges low | Flow pct |
|---|---|---|---|---|
| 2026-09-07 | 5 | 0 | 0/2 | p28 |
Top water assets
- 66Holden New City Reservoirreservoir
- 66South Fork Blackwater River Dam Lt-67reservoir
- 66Blind Pony Damreservoir
- 66South Fork Blackwater River Dam E- 7reservoir
- 66Sexton Lake Damreservoir
- 66E.Br So Fk Blackwater B-11reservoir
- 66Gann Lake Damreservoir
- 66South Fork Blackwater F-1reservoir
- 66Maple Leaf Lake Damreservoir
- 66Edwin A. Pape Lake Damreservoir