Rivermatics

3 USGS Streamgages · Columbia River system

Oak Grove Fork flows and levels

Oak Grove Fork is gauged at 3 USGS streamgages in Oregon, each tracked by Rivermatics. It feeds the Oak Grove Fork Clackamas River. It drains into the Columbia River system. Drainage area at the gauges ranges from 54 square miles at Oak Grove Fork near Government Camp, OR up to 141 at Oak Grove Fork at Ripplebrook Campground, OR. Rivermatics issues a daily machine-learned 14-day flow outlook for every one of them.

Gauges on this river, upstream to downstream

Ordered by drainage area, which is how far down the river each gauge sits. April and July figures are long-term median daily flows for that month from the USGS record — historical normals, not a forecast and not today's reading.

USGS streamgages on this river, ordered upstream to downstream
Gauge State Drainage sq mi Elevation ft April p50 cfs July p50 cfs Forecast
Oak Grove Fork near Government Camp, OR OR 54 — 103.7 71.9 14-day
Oak Grove Fork above Powerplant Intake, OR OR 124 — 587.9 338.3 14-day
Oak Grove Fork at Ripplebrook Campground, OR OR 141 — 205.1 101.6 14-day

Typical flow by month at Oak Grove Fork at Ripplebrook Campground, OR

The furthest-downstream gauge on this river, so the fullest flow it carries here. Long-term daily discharge percentiles from the USGS record (up to 15 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 60.6 119.3 725.7
February 78.1 118.5 554.8
March 75.4 128.7 630.6
April 106.8 205.1 624.7
May 88.4 135.4 730.8
June 42.6 110.9 523.3
July 22.8 101.6 344.4
August 17.4 99 281.7
September 15.3 98.8 291.9
October 15.7 100.7 349.6
November 21.1 103 409
December 34.3 111.5 473.4

All values in cubic feet per second (cfs).

Common questions

When does the Oak Grove Fork run highest?
April, on the long-term record at Oak Grove Fork at Ripplebrook Campground, OR — the furthest-downstream gauge Rivermatics tracks on this river. Median daily flow there is about 205.1 cfs that month, against 98.8 cfs in September, the lowest. Upstream gauges peak on their own schedule; the table on this page gives April and July for each.
How many gauges are on the Oak Grove Fork?
Rivermatics tracks 3 USGS streamgages on the Oak Grove Fork, across Oregon. Each has its own page with the site's full flow record and monthly normals. The river may carry other gauges that publish neither daily values nor discharge statistics; those are not tracked here.
Is there a flow forecast for the Oak Grove Fork?
Yes, at 3 of the 3 gauges. Rivermatics trains a machine-learned model — a temporal-fusion transformer — on each basin's observed flows, weather and snowpack, and issues a daily 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 each gauge's live screen.
What river system is the Oak Grove Fork part of?
The Oak Grove Fork drains into the Columbia River system — it is a tributary somewhere in that chain, following the flowpath down to its terminal river. Rivermatics builds this from the USGS/geoconnex reference-mainstem network rather than from names.
Can I use Oak Grove Fork 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 rivers in the Columbia River system

Browse nearby gauges by state