Rivermatics

USGS Streamgage 10170500

Surplus Canal @ Salt Lake City, UT

Surplus Canal @ Salt Lake City, UT is USGS streamgage 10170500 in Utah, monitoring river discharge in hydrologic subbasin 16020204. Discharge records at this site go back to 1942. Typical flow runs near 195.2 cfs in July and 304 cfs in April, with the higher of the two arriving in April. Rivermatics issues a daily machine-learned flow outlook for this gauge, reaching 14 days ahead.

View live conditions & forecast →

Gauge details

State
Utah
Gauge elevation
4,217 ft
Subbasin (HUC-8)
16020204
Coordinates
40.72756, -111.92736
USGS site number
10170500
Records begin
1942-12-01 (84 years)
Rivermatics forecast
14-day flow outlook

14-day flow forecast

Based on observations through for Surplus Canal @ Salt Lake City, UT. 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
214 232 291
210 231 279
218 262 394
214 246 316
205 232 282
199 223 263
192 217 255
188 212 245
185 209 241
180 205 235
182 209 245
182 211 251
176 207 242
174 204 238

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 83 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 60.5 133.5 807
February 62.9 197.3 1,083.3
March 70 247.9 1,190.6
April 95.3 304 1,262
May 176.6 426.5 1,595.5
June 179.1 412.9 1,646.7
July 112.2 195.2 802.4
August 108.5 196.5 423.8
September 122.6 208.6 419.2
October 104.6 171.2 484
November 91.2 133.4 703.1
December 78.9 136 679.1

All values in cubic feet per second (cfs).

Common questions

When does Surplus Canal @ Salt Lake City, UT normally run highest?
May, on the long-term record. The median daily flow that month is about 426.5 cfs, against 133.4 cfs in November, the lowest month. These are historical normals for the date, not a forecast and not today's reading.
What is a normal flow for Surplus Canal @ Salt Lake City, UT?
It depends on the month. In January, half of days historically fall near 133.5 cfs, with the middle 80% of days between 60.5 and 807 cfs. The month-by-month table on this page gives the full range.
How long has Surplus Canal @ Salt Lake City, UT been measured?
Discharge records at USGS site 10170500 begin in 1942, about 84 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 Surplus Canal @ Salt Lake City, UT?
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 Surplus Canal @ Salt Lake City, UT?
The gauge sits at 40.72756, -111.92736, in Utah, in hydrologic subbasin 16020204, at an elevation of about 4,217 feet.
Can I use Surplus Canal @ Salt Lake City, UT 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