Rivermatics

USGS Streamgage 09202700

Ward Ball Reservoir outflow, near Boulder, WY

Ward Ball Reservoir outflow, near Boulder, WY is USGS streamgage 09202700 in Wyoming, monitoring river discharge in hydrologic subbasin 14040102. Discharge records at this site go back to 2025. Rivermatics issues a daily machine-learned flow outlook for this gauge, reaching 14 days ahead.

View live conditions & forecast →

Gauge details

State
Wyoming
Gauge elevation
6,976 ft
Subbasin (HUC-8)
14040102
Coordinates
42.72529, -109.70377
USGS site number
09202700
Records begin
2025-07-17 (1 years)
Rivermatics forecast
14-day flow outlook

14-day flow forecast

Based on observations through for Ward Ball Reservoir outflow, near Boulder, WY. Each day carries a median estimate and the band the model expects the flow to fall within — not a single number to plan against. Forecasts are re-issued daily; see the live screen for the current outlook.

Forecast daily mean discharge in cubic feet per second, by date
Date Low p10 Expected p50 High p90 Range
9.7 11.4 13.3
8.6 11.3 17.2
7.9 10.9 18.9
7.7 11.1 22.2
7.4 11.2 26.4
7.2 11.2 27.9
7.7 13.1 33.5
7.4 14 44.7
7.2 13.4 43.5
7 13.1 44.9
6.8 12.9 45.5
6.6 13 46.7
6.5 13 47.6
6.4 13.2 48.8

All values in cubic feet per second (cfs). Estimates only — do not use them for navigation or for any safety, rescue, or emergency decision.

Common questions

How long has Ward Ball Reservoir outflow, near Boulder, WY been measured?
Discharge records at USGS site 09202700 begin in 2025, about 1 years, covering roughly 377 days of published daily values. The long record is what makes the monthly percentiles on this page meaningful.
Is there a flow forecast for Ward Ball Reservoir outflow, near Boulder, WY?
Yes. Rivermatics trains a machine-learned model — a temporal-fusion transformer — on this basin's observed flows, weather, and snowpack, and issues a daily flow outlook reaching 14 days ahead: a median estimate inside a confidence band, not a single number to bet on. Every forecast is scored against days the model never trained on, and that track record is published on the live gauge screen. Open live conditions to see the current outlook.
Where is Ward Ball Reservoir outflow, near Boulder, WY?
The gauge sits at 42.72529, -109.70377, in Wyoming, in hydrologic subbasin 14040102, at an elevation of about 6,976 feet.
Can I use Ward Ball Reservoir outflow, near Boulder, WY data for flood or safety decisions?
No. Rivermatics provides estimates, not guarantees, and the readings and forecasts here may be delayed, inaccurate, or wrong. Do not use them for navigation or for any safety, rescue, or emergency decision. Check the National Weather Service and USGS directly, and use your own judgment.

Other gauges in this subbasin