Rivermatics

USGS Streamgage 11277300

Cherry C below Valley Dam near Hetch Hetchy, CA

Cherry C below Valley Dam near Hetch Hetchy, CA is USGS streamgage 11277300 in California, monitoring river discharge in hydrologic subbasin 18040009. It sits on the Cherry C, alongside 2 other gauges Rivermatics tracks on the same river. It drains a watershed of about 118 square miles. Discharge records at this site go back to 1956. Typical flow runs near 16 cfs in July and 7.1 cfs in April, with the higher of the two arriving in July. Rivermatics issues a daily machine-learned flow outlook for this gauge, reaching 14 days ahead.

View live conditions & forecast →

Gauge details

State
California
Drainage area
118 sq mi
Gauge elevation
4,343 ft
Subbasin (HUC-8)
18040009
Coordinates
37.96768, -119.91737
USGS site number
11277300
Records begin
1956-11-01 (70 years)
Rivermatics forecast
14-day flow outlook

14-day flow forecast

Based on observations through for Cherry C below Valley Dam near Hetch Hetchy, CA. 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
16.8 17.3 17.8
16.6 17.3 18
16.4 17.3 18.1
16.1 17.3 18.2
15.8 17.3 18.3
15.3 17.2 18.3
15 17.1 18.4
14.3 17 18.4
13.8 16.9 18.5
13.5 16.9 18.5
13.2 16.9 18.8
13.2 16.9 18.9
12.3 16.6 18.6
11.9 16.4 18.6

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

Typical flow by month

Long-term daily discharge percentiles from the USGS record (up to 66 years of data), averaged within each month. These describe the historical normal range — they are not a forecast and not today's reading.

Historical monthly discharge percentiles in cubic feet per second
Month Low p10 Typical p50 High p90 Range
January 5.3 6.8 14.1
February 5.3 7.2 14.1
March 5.3 7.6 14.4
April 5 7.1 16.5
May 5 6.6 430.7
June 5.1 6.8 748.6
July 12.4 16 357.9
August 13.5 16 20.2
September 13.6 15.9 18.1
October 4.6 6 9.6
November 4.8 6 9.3
December 5 6.2 11.7

All values in cubic feet per second (cfs).

Common questions

When does Cherry C below Valley Dam near Hetch Hetchy, CA normally run highest?
July, on the long-term record. The median daily flow that month is about 16 cfs, against 6 cfs in October, the lowest month. These are historical normals for the date, not a forecast and not today's reading.
What is a normal flow for Cherry C below Valley Dam near Hetch Hetchy, CA?
It depends on the month. In January, half of days historically fall near 6.8 cfs, with the middle 80% of days between 5.3 and 14.1 cfs. The month-by-month table on this page gives the full range.
How long has Cherry C below Valley Dam near Hetch Hetchy, CA been measured?
Discharge records at USGS site 11277300 begin in 1956, about 70 years, covering roughly 9,130 days of published daily values. The long record is what makes the monthly percentiles on this page meaningful.
Is there a flow forecast for Cherry C below Valley Dam near Hetch Hetchy, CA?
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 Cherry C below Valley Dam near Hetch Hetchy, CA?
The gauge sits at 37.96768, -119.91737, in California, in hydrologic subbasin 18040009, at an elevation of about 4,343 feet, draining roughly 118 square miles.
Can I use Cherry C below Valley Dam near Hetch Hetchy, CA 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.

Upstream and downstream on the Cherry C

Every gauge Rivermatics tracks on this river, ordered by drainage area — upstream first. See the Cherry C in full.

Other gauges in this subbasin