The monitoring network within this area

Hydrionis holds 393 values from 2 gauges within it. Discharge is a property of a gauge and its reach, not of this drainage area, so this page reports the network and its records rather than a single figure.

Gauges

393

Values held

1915–2026

Record spans

Gauges within the North Fork John Day huc8 subbasin

2 monitoring points, positioned as the publisher records them.

Flood peaks, as measured

This gauge's flood record, as measured. Unlike a daily mean it is the discharge at the moment the river was highest, which is the figure flood frequency analysis is built on.

Largest measured flow of each year at NORTH FORK JOHN DAY RIVER AT MONUMENT, OR

The highest instantaneous discharge the publisher recorded in each year — a flood peak as measured, not a daily average of one. 1925–2025.

Show relevant events (1 event)Shading marks when something was recorded, not what caused the line.

Published by the gauge's own operator from its sub-daily record; Hydrionis stores the figure rather than recomputing it. A year the gauge did not cover produces no value rather than a low one, and the gaps are stated below the chart. A peak is a property of this gauge and its reach: a larger flood upstream or downstream of it is not in this series.

What the shaded periods are (1 event)

A shaded period marks when something was recorded, not what caused the shape of the line. Where the two coincide, they coincided.

Documented record — A documented event, compiled from cited sources after it happened. The dates are as good as the record, which for older events can mean the month rather than the day.

Event	Type	Period	Standing	Authority
Hurricane Katrina water and sanitation collapse	Flood	2005-08-29 – 2005-09-30	Documented record	Compiled record

Not shown on this chart

The 1976 drought — This event’s area does not contain this chart’s subject. Sharing a country is not sharing an event, so it is not drawn.
The 2022 drought — This event’s area does not contain this chart’s subject. Sharing a country is not sharing an event, so it is not drawn.
Yorkshire drought — This event’s area does not contain this chart’s subject. Sharing a country is not sharing an event, so it is not drawn.
Cantareira water crisis, São Paulo — This event’s area does not contain this chart’s subject. Sharing a country is not sharing an event, so it is not drawn.
Cape Town Day Zero — This event’s area does not contain this chart’s subject. Sharing a country is not sharing an event, so it is not drawn.
European drought — This event’s area does not contain this chart’s subject. Sharing a country is not sharing an event, so it is not drawn.

View the data behind this chart

Underlying data
Period	NORTH FORK JOHN DAY RIVER AT MONUMENT, OR (m³/s)
1925	181
1926	147
1927	237
1928	269
1929	187
1930	77.6
1931	334
1932	623
1933	192
1935	182
1936	215
1937	289
1938	283
1939	311
1940	289
1941	138
1942	226
1943	385
1944	191
1945	187
1947	152
1948	597
1949	269
1950	159
1951	253
1952	592
1953	337
1954	147
1955	160
1956	572
1957	294
1958	340
1960	214
1961	132
1962	208
1963	195
1964	225
1965	946
1966	125
1967	230
1968	144
1969	251
1970	510
1971	385
1972	552
1973	133
1974	535
1975	294
1976	233
1977	96.8
1978	368
1979	382
1980	165
1981	267
1982	549
1983	422
1984	323
1985	306
1986	558
1987	253
1988	120
1989	524
1990	176
1991	612
1993	521
1994	221
1995	277
1996	614
1997	861
1998	247
1999	256
2000	219
2001	155
2002	292
2003	218
2004	282
2005	311
2006	257
2007	155
2008	357
2009	294
2010	442
2011	801
2012	297
2013	148
2014	498
2016	257
2017	340
2018	181
2019	623
2020	566
2021	127
2022	314
2023	416
2024	279
2025	445

About this series

Everything below is a property of the data rather than a rating of it. There is deliberately no single confidence score: how much a gap matters depends on what you are about to do with the series, and only you know that.

Source	United States Geological Survey — National Water Information System · US Government work — public domain
How the values came to exist	Measured
Period held	1925–2025
Completeness	95.0% of the periods in that span are held. Gaps are drawn as breaks and never interpolated.
Known gaps	5 separate periods inside 1925–2025 hold no value. They are drawn as breaks in the line and are never interpolated across.
Continuity	The record begins in 1925 and is not continuous from it: 101 years separate the first value from the last, and 95% of the years between them are held. The span is not the record.
Last read from the publisher	2026-08-31
Redistribution	Permitted by the upstream licences
Commercial reuse	Permitted by the upstream licences. No Hydrionis access tier can widen this.
Methodology	How this was produced

How much of the rain came back out

A discharge in cubic metres per second cannot be compared with anything: the larger number may only mean the larger catchment. Divided by the area draining to the gauge it becomes a depth of water over that land, which answers a question a reader already has — of the rain that fell here, how much came back out as river?

Water leaving the catchment above NORTH FORK JOHN DAY RIVER AT MONUMENT, OR, as a depth

The year's flow spread over the land draining to this gauge, in millimetres — the same unit rainfall is measured in. 1929–2025.

Show relevant events (1 event)Shading marks when something was recorded, not what caused the line.

Computed by Hydrionis from the published annual mean flow and the catchment area the station's own publisher states. It is not a water balance: the difference between rainfall and runoff is not evaporation alone but also change in groundwater storage, water abstracted and taken elsewhere, and water imported by transfer schemes — which is why a catchment can yield more runoff than the rain that fell on it without anything being measured wrongly. A different area figure rescales every value here by the ratio between them.

What the shaded periods are (1 event)

A shaded period marks when something was recorded, not what caused the shape of the line. Where the two coincide, they coincided.

Documented record — A documented event, compiled from cited sources after it happened. The dates are as good as the record, which for older events can mean the month rather than the day.

Event	Type	Period	Standing	Authority
Hurricane Katrina water and sanitation collapse	Flood	2005-08-29 – 2005-09-30	Documented record	Compiled record

Not shown on this chart

The 1976 drought — This event’s area does not contain this chart’s subject. Sharing a country is not sharing an event, so it is not drawn.
The 2022 drought — This event’s area does not contain this chart’s subject. Sharing a country is not sharing an event, so it is not drawn.
Yorkshire drought — This event’s area does not contain this chart’s subject. Sharing a country is not sharing an event, so it is not drawn.
Cantareira water crisis, São Paulo — This event’s area does not contain this chart’s subject. Sharing a country is not sharing an event, so it is not drawn.
Cape Town Day Zero — This event’s area does not contain this chart’s subject. Sharing a country is not sharing an event, so it is not drawn.
European drought — This event’s area does not contain this chart’s subject. Sharing a country is not sharing an event, so it is not drawn.

View the data behind this chart

Underlying data
Period	NORTH FORK JOHN DAY RIVER AT MONUMENT, OR (mm)
1929	129
1930	71.0
1931	83.0
1932	223
1933	161
1934	62.0
1935	89.0
1936	109
1937	139
1938	167
1939	118
1940	135
1941	158
1942	213
1943	251
1944	69.0
1945	163
1946	192
1947	156
1948	288
1949	194
1950	200
1951	196
1952	192
1953	225
1954	130
1955	141
1956	273
1957	213
1958	268
1959	138
1960	150
1961	120
1962	167
1963	150
1964	155
1965	265
1966	84.0
1967	144
1968	92.0
1969	205
1970	197
1971	213
1972	244
1973	126
1974	257
1975	213
1976	179
1977	80.0
1978	173
1979	230
1980	180
1981	179
1982	316
1983	314
1984	362
1985	170
1986	229
1987	136
1988	94.0
1989	236
1990	110
1991	180
1992	78.0
1993	260
1994	110
1995	249
1996	277
1997	261
1998	195
1999	225
2000	154
2001	86.0
2002	127
2003	147
2004	195
2005	111
2006	228
2007	121
2008	218
2009	186
2010	163
2011	340
2012	152
2013	116
2014	176
2015	107
2016	148
2017	246
2018	116
2019	234
2020	150
2021	99.0
2022	174
2023	184
2025	211

About this series

Source	United States Geological Survey — National Water Information System · US Government work — public domain
How the values came to exist	Derived Computed by Hydrionis
Period held	1929–2025
Completeness	99.0% of the periods in that span are held. Gaps are drawn as breaks and never interpolated.
Known gaps	One period inside 1929–2025 holds no value: 2024. It is drawn as a break in the line and is never interpolated across.
Continuity	The record begins in 1929 and is not continuous from it: 97 years separate the first value from the last, and 99% of the years between them are held. The span is not the record.
Last read from the publisher	2026-08-24
Redistribution	Permitted by the upstream licences
Commercial reuse	Permitted by the upstream licences. No Hydrionis access tier can widen this.
Methodology	How this was produced

Every gauge Hydrionis holds within this area

Gauges within the North Fork John Day and what each holds
Gauge	Measures	Values	Record
NORTH FORK JOHN DAY RIVER AT MONUMENT, OR	burned area within 50 km, catchment area, annual maximum river flow, mean river flow	234	1925–2026
CAMAS CREEK NEAR UKIAH, OREG.	burned area within 50 km, catchment area, annual maximum river flow, mean river flow	159	1915–2026

How these gauges were attached to this water

Assigned by the publisher to a numbered basin Every gauge here is assigned to this drainage area by its own publisher, which issues the area an official code — 17070202. A drainage area is not a river: it contains the tributaries as well as the main channel, and a gauge in it may be on any of them.

What each gauge’s link to this water rests on
Gauge	Evidence	Established
NORTH FORK JOHN DAY RIVER AT MONUMENT, OR	Stated by the publisher — USGS site service, huc_cd field — https://waterservices.usgs.gov/nwis/site/ ; named from the USGS Watershed Boundary Dataset 8-digit HU (Subbasin) layer — https://hydro.nationalmap.gov/arcgis/rest/services/wbd/MapServer/4	2026-08-26
CAMAS CREEK NEAR UKIAH, OREG.	Stated by the publisher — USGS site service, huc_cd field — https://waterservices.usgs.gov/nwis/site/ ; named from the USGS Watershed Boundary Dataset 8-digit HU (Subbasin) layer — https://hydro.nationalmap.gov/arcgis/rest/services/wbd/MapServer/4	2026-08-26

What this record holds

Hydrionis decides which waters get a page, and which of those are offered to search, from what is actually held rather than from how the page reads. Five signals are counted; this record has 3 of them, which makes it a full profile.

Information-gain signals held for this water body
Signal	Held	Counts
Gauges holding a real record	2	no
Years spanned	112	yes, 20 or more
Values held	393	no
Distinct measurements	4	yes, 2 or more
Publishers measuring it	2	yes, 2 or more
Official identifiers	1	recorded, not counted

Use this data

Machine-readable JSON /api/v1/observations/by-subject/gauge-usgs-14046000.json
How to cite this, and who you must credit
How these figures were produced
Request this at a different scale, format or geography

No bulk download is offered here, which is a licence position rather than a product one: at least one contributing publisher does not permit redistribution. The values can be read on the page, cited, and pointed to at source.

Attribution and citation

Suggested citation for Hydrionis

Hydrionis (2026), North Fork John Day gauge records, accessed 2026-09-02, hydrionis.com/waters/united-states-north-fork-john-day/

Cite Hydrionis where you rely on values Hydrionis computed, on the method that produced them, or on the compilation itself. The underlying measurements remain the publishers’ and their attribution requirements apply to you directly.

Recommended, not required. Hydrionis does not claim rights over unmodified public data it relayed, and doing arithmetic on somebody else’s measurements does not make them Hydrionis’s. Cite the version and the access date: the North Fork John Day gauge records changes as publishers release and as methods are revised, and a citation without both cannot be checked later. Full guidance is on cite and reuse.

None of the contributing licences requires attribution. Crediting the publishers is still good practice and they are listed above.

Where these figures come from

MeasuredHigh confidence2025-01-04

Source: USGS — National Water Information System, USGS site 14046000, annual peak streamflow. Licence: Open.

Method: The instantaneous maximum discharge of each water year as published by USGS, dated to the day it occurred. One value per October-to-September water year; where the publisher lists both a systematic and a historic peak for a year, the larger is the annual maximum. Values the publisher marks as maximum daily averages are not held here, because they are not instantaneous peaks. Values marked as bounded rather than measured are held as censored observations carrying the bound. Cubic feet per second are converted to cubic metres per second and the publisher unit is recorded alongside.

Rating curves are extrapolated at extreme discharges, so the largest values in a peak series carry the largest measurement uncertainty. Data from the U.S. Geological Survey National Water Information System, a work of the United States government and therefore in the public domain.

Retrieved 31 August 2026.