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HARRIMAN DITCH LEFT IN STREAM AT HEADGAT

Structure dossier · WDID 0902950 · OTHER · BEAR CREEK · DWR record

Source DWR administrative record · verify at DWR structure ↗ Source DWR administrative record · verify at DWR diversion records ↗ Source Our computation, scored against a reference · scored against DWR's call analysis, see /methods

Where this page's figures come from

Generated 2026-10-12 10:58 by Hydrohistorian. Sources: DWR HydroBase snapshot HydroBase_CO_20260928 (history) + CDSS REST (current), USGS NWIS cross-checks. Engine v0.5.0 (dd58e60) — every figure regenerates from this named code version and data image.

The record and the river

Where this structure is measured

GageFlowing nowRecordHow we know
HARRIMAN DITCH HRRDITCO 0.27 cfs 2015–2026, 3,915 days co-located, 218 m

A green link is DWR's own: either its telemetry inventory maps this WDID to that station, or the station is named for this WDID (0700553 → 0700553A). An amber one is ours — the station sits within 250 m and shares a distinctive word with this structure's name, which is a strong hint rather than a DWR statement that this gage meters this structure. Wrong? Tell us.

In short

HARRIMAN DITCH LEFT IN STREAM AT HEADGAT holds 5 decreed rights on BEAR CREEK. A call at PIONEER UNION DITCH on BEAR CREEK (1861-12-10) currently reaches it: junior rights called out. 7 further calls state no district and sit outside this one, so they are counted here rather than assumed either way. That is today's position; the weeks ahead cannot be projected for it: this structure is not on the modelled flow network, so no reference gage can honestly stand in for it. In a median year over its last 13 recorded years it diverts 640 acre-feet. It was a party to 5 court cases that also touched 24 other structures.

Assembled from the figures on this page — every number above is checked against them before it is shown (7 checked). The detail, with its method, is in the cards below.

Download this structure

Everything on this page as data you can work with — and a README that makes it citable: the HydroBase snapshot it was built from, the build commit, what every column means, the method behind each derived figure, and that method's stated limits.

⇩ Full record (.zip) Print / save as PDF

Or one table at a time: rights.csv · annual_use.csv · curtailment_now.csv · court_cases.csv · co_parties.csv · call_climatology.csv

What is in the bundle
  • rights.csv — every decreed right, most senior first, with admin numbers, dates, amounts, uses and case numbers.
  • annual_use.csv — recorded diversion by year, with releases accounted separately.
  • curtailment_now.csv — each right's current priority status and how often it was out across analog years.
  • court_cases.csv — the cases attached to its rights.
  • co_parties.csv — the other structures that were parties to those cases. Not available anywhere else.
  • call_climatology.csv — how often each right has been out of priority by week of season, with confidence intervals and the seasons the record could actually judge.
  • README.txt — provenance, methods, limits, disclaimer, and links back to DWR's own records for verification.

Where it sits

Location as DWR records it (other). Faint dots are the neighbouring water; click any to open it.

Current administration

● Junior rights called out — call at PIONEER UNION DITCH (BEAR CREEK, priority 1861-12-10).

Which of its rights are out of priority?

The outlook for the weeks ahead is not computable for this structure: this structure is not on the modelled flow network, so no reference gage can honestly stand in for it. Today’s position is a separate question, and it is answered in Current administration above — that screen reads the district’s active calls and needs no reference gage.

Where it sits in line

Priority 1861-12-01 — 21st most senior of the 2058 structures with decreed rights in this water districtDWR's administrative subdivision of a river basin; the unit calls are usually stated in..

Under prior appropriationColorado's rule for sharing water: first in time, first in right. Age decides, not proximity or need., everything ahead of it in this line is satisfied in full before it receives any water. Immediately ahead: MOUNT CARBON METRO DIST DITCH (1861-12-01). Immediately behind: HOMESTEAD GOLF COURSE PONDS (1861-12-01).

Decreed rights (5)

Admin noDWR's numeric encoding of a water right's seniority. Smaller is more senior; the integer part counts days from 1849-12-31 to the date that ranks the right. AppropriatedWhen water was first put to beneficial use. It sets seniority unless a prior adjudication date is later. AdjudicatedWhen the water court confirmed the right. A use decreed in 1975 was not a decreed use in 1955, however old the appropriation is. AbsoluteA right actually put to use, as opposed to conditional -- a placeholder for a use not yet made. ConditionalA right reserving a place in line for a use not yet made; it must be diligently pursued or it lapses. Alt-pointAn absolute amount decreed at another structure that may be diverted here instead -- an alternate point of diversion or an exchange. DWR calls this the APEX amount; a right showing 0.0 absolute but an alt-point amount is exercised here under another structure's decree. Decreed forWhat the court said this water may be used for -- irrigation, municipal supply, augmentation and so on.Case
4353.00000 1861-12-011884-02-04 0.0308 cfs 0.0 — Municipal, Domestic +1 80CW0289
5418.00000 1864-10-311884-02-04 0.0637 cfs 0.0 — Municipal, Domestic +1 80CW0289
5570.00000 1865-04-011884-02-04 0.0287 cfs 0.0 — Municipal, Domestic +1 80CW0289
5753.00000 1865-10-011884-02-04 326.02 AF 0.0 — Irrigation, Municipal +7 84CW0221, 04CW0197 +2
5753.00000 1865-10-011884-02-04 1.97 cfs 0.0 — Irrigation, Municipal +7 84CW0221, 04CW0197 +2

Amounts marked cfs are flow rates; AF are stored volumes (storage rights are decreed in acre-feet). An absolute amount of 0.0 beside an alt-point amount is not a dead right: the water is decreed at another structure, and that row records permission to divert it here instead (an alternate point or exchange). A case listing several numbers reflects the original decree plus later change cases.

How much of this decree was in priority, by day

A right is in priority on a day when it is senior to every call administering this structure. Of its 2.093 cfs decreed rate, the average day over the last 6 year(s) had 1.798 cfs in priority (86% of the decree). No call in effect is a free river — that was 10.0% of days.

On 280 days some rights were in priority and others were not — seniority splits a decree rather than switching it off. Calls are set and released at a time of day, not at midnight, so a day is counted by the hour: a call setting at 4pm costs that day a third of its rate, not all of it. A call began or ended mid-day on 29 of these days.

This is paper water. It is the decreed rate that was in priority — not water that was physically in the stream, and not water this structure diverted. A ditch can be in priority for 50 cfs on a day the creek carries five. What that distinction means →

YearMean in priority (Apr–Sep) Share of decreeFree-river days Days fully out
2026 0.55 cfs 26% 0 0
2025 1.36 cfs 65% 2 0
2024 1.76 cfs 84% 110 0
2023 2.09 cfs 100% 68 0
2022 2.09 cfs 100% 3 0
2021 2.09 cfs 100% 0 0
Show the last 120 days, day by day
DateIn priorityControlling call
2026-10-11 0.031 cfs (1%) WARD DITCH, 1862-09-01 · Bear Creek · same source, at or above the calling point
2026-10-10 0.031 cfs (1%) WARD DITCH, 1862-09-01 · Bear Creek · same source, at or above the calling point
2026-10-09 0.031 cfs (1%) WARD DITCH, 1862-09-01 · Bear Creek · same source, at or above the calling point
2026-10-08 0.031 cfs (1%) WARD DITCH, 1862-09-01 · Bear Creek · same source, at or above the calling point
2026-10-07 0.031 cfs (1%) WARD DITCH, 1862-09-01 · Bear Creek · same source, at or above the calling point
2026-10-06 0.031 cfs (1%) WARD DITCH, 1862-09-01 · Bear Creek · same source, at or above the calling point
2026-10-05 0.031 cfs (1%) WARD DITCH, 1862-09-01 · Bear Creek · same source, at or above the calling point
2026-10-04 0.031 cfs (1%) WARD DITCH, 1862-09-01 · Bear Creek · same source, at or above the calling point
2026-10-03 0.031 cfs (1%) WARD DITCH, 1862-09-01 · Bear Creek · same source, at or above the calling point
2026-10-02 0.031 cfs (1%) WARD DITCH, 1862-09-01 · Bear Creek · same source, at or above the calling point
2026-10-01 0.031 cfs (1%) WARD DITCH, 1862-09-01 · Bear Creek · same source, at or above the calling point
2026-09-30 0.031 cfs (1%) WARD DITCH, 1862-09-01 · Bear Creek · same source, at or above the calling point
2026-09-29 0.031 cfs (1%) WARD DITCH, 1862-09-01 · Bear Creek · same source, at or above the calling point
2026-09-28 0.031 cfs (1%) WARD DITCH, 1862-09-01 · Bear Creek · same source, at or above the calling point
2026-09-27 0.031 cfs (1%) WARD DITCH, 1862-09-01 · Bear Creek · same source, at or above the calling point
2026-09-26 0.031 cfs (1%) WARD DITCH, 1862-09-01 · Bear Creek · same source, at or above the calling point
2026-09-25 0.031 cfs (1%) WARD DITCH, 1862-09-01 · Bear Creek · same source, at or above the calling point
2026-09-24 0.031 cfs (1%) WARD DITCH, 1862-09-01 · Bear Creek · same source, at or above the calling point
2026-09-23 0.031 cfs (1%) WARD DITCH, 1862-09-01 · Bear Creek · same source, at or above the calling point
2026-09-22 0.031 cfs (1%) WARD DITCH, 1862-09-01 · Bear Creek · same source, at or above the calling point
2026-09-21 0.031 cfs (1%) WARD DITCH, 1862-09-01 · Bear Creek · same source, at or above the calling point
2026-09-20 0.031 cfs (1%) WARD DITCH, 1862-09-01 · Bear Creek · same source, at or above the calling point
2026-09-19 0.031 cfs (1%) WARD DITCH, 1862-09-01 · Bear Creek · same source, at or above the calling point
2026-09-18 0.031 cfs (1%) WARD DITCH, 1862-09-01 · Bear Creek · same source, at or above the calling point
2026-09-17 0.031 cfs (1%) WARD DITCH, 1862-09-01 · Bear Creek · same source, at or above the calling point
2026-09-16 0.031 cfs (1%) WARD DITCH, 1862-09-01 · Bear Creek · same source, at or above the calling point
2026-09-15 0.031 cfs (1%) WARD DITCH, 1862-09-01 · Bear Creek · same source, at or above the calling point
2026-09-14 0.031 cfs (1%) WARD DITCH, 1862-09-01 · Bear Creek · same source, at or above the calling point
2026-09-13 0.031 cfs (1%) WARD DITCH, 1862-09-01 · Bear Creek · same source, at or above the calling point
2026-09-12 0.031 cfs (1%) WARD DITCH, 1862-09-01 · Bear Creek · same source, at or above the calling point
2026-09-11 0.031 cfs (1%) WARD DITCH, 1862-09-01 · Bear Creek · same source, at or above the calling point
2026-09-10 0.031 cfs (1%) WARD DITCH, 1862-09-01 · Bear Creek · same source, at or above the calling point
2026-09-09 0.031 cfs (1%) WARD DITCH, 1862-09-01 · Bear Creek · same source, at or above the calling point
2026-09-08 0.031 cfs (1%) WARD DITCH, 1862-09-01 · Bear Creek · same source, at or above the calling point
2026-09-07 0.031 cfs (1%) WARD DITCH, 1862-09-01 · Bear Creek · same source, at or above the calling point
2026-09-06 0.031 cfs (1%) WARD DITCH, 1862-09-01 · Bear Creek · same source, at or above the calling point
2026-09-05 0.031 cfs (1%) WARD DITCH, 1862-09-01 · Bear Creek · same source, at or above the calling point
2026-09-04 0.031 cfs (1%) WARD DITCH, 1862-09-01 · Bear Creek · same source, at or above the calling point
2026-09-03 0.031 cfs (1%) WARD DITCH, 1862-09-01 · Bear Creek · same source, at or above the calling point
2026-09-02 0.031 cfs (1%) WARD DITCH, 1862-09-01 · Bear Creek · same source, at or above the calling point
2026-09-01 0.031 cfs (1%) WARD DITCH, 1862-09-01 · Bear Creek · same source, at or above the calling point
2026-08-31 0.031 cfs (1%) WARD DITCH, 1862-09-01 · Bear Creek · same source, at or above the calling point
2026-08-30 0.031 cfs (1%) WARD DITCH, 1862-09-01 · Bear Creek · same source, at or above the calling point
2026-08-29 0.031 cfs (1%) WARD DITCH, 1862-09-01 · Bear Creek · same source, at or above the calling point
2026-08-28 0.031 cfs (1%) WARD DITCH, 1862-09-01 · Bear Creek · same source, at or above the calling point
2026-08-27 0.031 cfs (1%) WARD DITCH, 1862-09-01 · Bear Creek · same source, at or above the calling point
2026-08-26 0.031 cfs (1%) WARD DITCH, 1862-09-01 · Bear Creek · same source, at or above the calling point
2026-08-25 0.031 cfs (1%) WARD DITCH, 1862-09-01 · Bear Creek · same source, at or above the calling point
2026-08-24 0.031 cfs (1%) WARD DITCH, 1862-09-01 · Bear Creek · same source, at or above the calling point
2026-08-23 0.031 cfs (1%) WARD DITCH, 1862-09-01 · Bear Creek · same source, at or above the calling point
2026-08-22 0.031 cfs (1%) WARD DITCH, 1862-09-01 · Bear Creek · same source, at or above the calling point
2026-08-21 0.031 cfs (1%) WARD DITCH, 1862-09-01 · Bear Creek · same source, at or above the calling point
2026-08-20 0.031 cfs (1%) WARD DITCH, 1862-09-01 · Bear Creek · same source, at or above the calling point
2026-08-19 0.031 cfs (1%) WARD DITCH, 1862-09-01 · Bear Creek · same source, at or above the calling point
2026-08-18 0.031 cfs (1%) WARD DITCH, 1862-09-01 · Bear Creek · same source, at or above the calling point
2026-08-17 0.718 cfs (34%) WARD DITCH, 1862-09-01 · Bear Creek · same source, at or above the calling point
2026-08-16 2.093 cfs (100%) HARRIMAN DITCH, 1865-10-01 · Bear Creek · same source, at or above the calling point
2026-08-15 1.427 cfs (68%) HARRIMAN DITCH, 1864-10-31 · Bear Creek · same source, at or above the calling point
2026-08-14 0.073 cfs (4%) HARRIMAN DITCH, 1861-12-01 · Bear Creek · same source, at or above the calling point
2026-08-13 0.031 cfs (1%) HARRIMAN DITCH, 1861-12-01 · Bear Creek · same source, at or above the calling point
2026-08-12 0.031 cfs (1%) HARRIMAN DITCH, 1861-12-01 · Bear Creek · same source, at or above the calling point
2026-08-11 0.031 cfs (1%) HARRIMAN DITCH, 1861-12-01 · Bear Creek · same source, at or above the calling point
2026-08-10 0.031 cfs (1%) HARRIMAN DITCH, 1861-12-01 · Bear Creek · same source, at or above the calling point
2026-08-09 0.031 cfs (1%) HARRIMAN DITCH, 1861-12-01 · Bear Creek · same source, at or above the calling point
2026-08-08 0.031 cfs (1%) HARRIMAN DITCH, 1861-12-01 · Bear Creek · same source, at or above the calling point
2026-08-07 0.031 cfs (1%) HARRIMAN DITCH, 1861-12-01 · Bear Creek · same source, at or above the calling point
2026-08-06 0.031 cfs (1%) HARRIMAN DITCH, 1861-12-01 · Bear Creek · same source, at or above the calling point
2026-08-05 0.031 cfs (1%) HARRIMAN DITCH, 1861-12-01 · Bear Creek · same source, at or above the calling point
2026-08-04 0.031 cfs (1%) HARRIMAN DITCH, 1861-12-01 · Bear Creek · same source, at or above the calling point
2026-08-03 0.031 cfs (1%) HARRIMAN DITCH, 1861-12-01 · Bear Creek · same source, at or above the calling point
2026-08-02 0.031 cfs (1%) HARRIMAN DITCH, 1861-12-01 · Bear Creek · same source, at or above the calling point
2026-08-01 0.031 cfs (1%) HARRIMAN DITCH, 1861-12-01 · Bear Creek · same source, at or above the calling point
2026-07-31 0.031 cfs (1%) PIONEER UNION DITCH, 1861-12-10 · Bear Creek · same source, at or above the calling point
2026-07-30 0.031 cfs (1%) PIONEER UNION DITCH, 1861-12-10 · Bear Creek · same source, at or above the calling point
2026-07-29 0.031 cfs (1%) HARRIMAN DITCH, 1861-12-01 · Bear Creek · same source, at or above the calling point
2026-07-28 0.031 cfs (1%) HARRIMAN DITCH, 1861-12-01 · Bear Creek · same source, at or above the calling point
2026-07-27 0.031 cfs (1%) HARRIMAN DITCH, 1861-12-01 · Bear Creek · same source, at or above the calling point
2026-07-26 0.031 cfs (1%) HARRIMAN DITCH, 1861-12-01 · Bear Creek · same source, at or above the calling point
2026-07-25 0.031 cfs (1%) HARRIMAN DITCH, 1861-12-01 · Bear Creek · same source, at or above the calling point
2026-07-24 0.031 cfs (1%) HARRIMAN DITCH, 1861-12-01 · Bear Creek · same source, at or above the calling point
2026-07-23 0.031 cfs (1%) HARRIMAN DITCH, 1861-12-01 · Bear Creek · same source, at or above the calling point
2026-07-22 0.031 cfs (1%) HARRIMAN DITCH, 1861-12-01 · Bear Creek · same source, at or above the calling point
2026-07-21 0.031 cfs (1%) HARRIMAN DITCH, 1861-12-01 · Bear Creek · same source, at or above the calling point
2026-07-20 0.031 cfs (1%) HARRIMAN DITCH, 1861-12-01 · Bear Creek · same source, at or above the calling point
2026-07-19 0.021 cfs (1%) SOUTH PLATTE RIVER AT WATERTON, 1860-12-31 · South Platte River · on a river this source flows into
2026-07-18 0.01 cfs (0%) SOUTH PLATTE RIVER AT WATERTON, 1860-12-31 · South Platte River · on a river this source flows into
2026-07-17 0.031 cfs (1%) HARRIMAN DITCH, 1861-12-01 · Bear Creek · same source, at or above the calling point
2026-07-16 0.031 cfs (1%) HARRIMAN DITCH, 1861-12-01 · Bear Creek · same source, at or above the calling point
2026-07-15 0.031 cfs (1%) HARRIMAN DITCH, 1861-12-01 · Bear Creek · same source, at or above the calling point
2026-07-14 0.031 cfs (1%) HARRIMAN DITCH, 1861-12-01 · Bear Creek · same source, at or above the calling point
2026-07-13 0.031 cfs (1%) HARRIMAN DITCH, 1861-12-01 · Bear Creek · same source, at or above the calling point
2026-07-12 0.031 cfs (1%) HARRIMAN DITCH, 1861-12-01 · Bear Creek · same source, at or above the calling point
2026-07-11 0.031 cfs (1%) HARRIMAN DITCH, 1861-12-01 · Bear Creek · same source, at or above the calling point
2026-07-10 0.031 cfs (1%) HARRIMAN DITCH, 1861-12-01 · Bear Creek · same source, at or above the calling point
2026-07-09 0.031 cfs (1%) HARRIMAN DITCH, 1861-12-01 · Bear Creek · same source, at or above the calling point
2026-07-08 0.031 cfs (1%) HARRIMAN DITCH, 1861-12-01 · Bear Creek · same source, at or above the calling point
2026-07-07 0.031 cfs (1%) HARRIMAN DITCH, 1861-12-01 · Bear Creek · same source, at or above the calling point
2026-07-06 0.031 cfs (1%) HARRIMAN DITCH, 1861-12-01 · Bear Creek · same source, at or above the calling point
2026-07-05 0.031 cfs (1%) HARRIMAN DITCH, 1861-12-01 · Bear Creek · same source, at or above the calling point
2026-07-04 0.031 cfs (1%) HARRIMAN DITCH, 1861-12-01 · Bear Creek · same source, at or above the calling point
2026-07-03 0.031 cfs (1%) HARRIMAN DITCH, 1861-12-01 · Bear Creek · same source, at or above the calling point
2026-07-02 0.031 cfs (1%) HARRIMAN DITCH, 1861-12-01 · Bear Creek · same source, at or above the calling point
2026-07-01 0.031 cfs (1%) HARRIMAN DITCH, 1861-12-01 · Bear Creek · same source, at or above the calling point
2026-06-30 0.031 cfs (1%) HARRIMAN DITCH, 1861-12-10 · Bear Creek · same source, at or above the calling point
2026-06-29 0.031 cfs (1%) HARRIMAN DITCH, 1861-12-01 · Bear Creek · same source, at or above the calling point
2026-06-28 0.718 cfs (34%) HARRIMAN DITCH, 1861-12-01 · Bear Creek · same source, at or above the calling point
2026-06-27 2.093 cfs (100%) HARRIMAN DITCH, 1865-10-01 · Bear Creek · same source, at or above the calling point
2026-06-26 2.093 cfs (100%) WESTERN MUTUAL DITCH, 1871-10-05 · South Platte River · on a river this source flows into
2026-06-25 1.406 cfs (67%) HARRIMAN DITCH, 1861-12-01 · Bear Creek · same source, at or above the calling point
2026-06-24 0.031 cfs (1%) HARRIMAN DITCH, 1861-12-01 · Bear Creek · same source, at or above the calling point
2026-06-23 0.031 cfs (1%) HARRIMAN DITCH, 1861-12-01 · Bear Creek · same source, at or above the calling point
2026-06-22 0.031 cfs (1%) HARRIMAN DITCH, 1861-12-01 · Bear Creek · same source, at or above the calling point
2026-06-21 0.031 cfs (1%) HARRIMAN DITCH, 1861-12-01 · Bear Creek · same source, at or above the calling point
2026-06-20 0.031 cfs (1%) HARRIMAN DITCH, 1861-12-01 · Bear Creek · same source, at or above the calling point
2026-06-19 0.031 cfs (1%) HARRIMAN DITCH, 1861-12-01 · Bear Creek · same source, at or above the calling point
2026-06-18 0.031 cfs (1%) HARRIMAN DITCH, 1861-12-01 · Bear Creek · same source, at or above the calling point
2026-06-17 0.031 cfs (1%) HARRIMAN DITCH, 1861-12-01 · Bear Creek · same source, at or above the calling point
2026-06-16 0.031 cfs (1%) HARRIMAN DITCH, 1861-12-01 · Bear Creek · same source, at or above the calling point
2026-06-15 0.031 cfs (1%) HARRIMAN DITCH, 1861-12-01 · Bear Creek · same source, at or above the calling point
2026-06-14 0.031 cfs (1%) HARRIMAN DITCH, 1861-12-01 · Bear Creek · same source, at or above the calling point
How this is worked out, and what it cannot tell you
  • This is a decreed rate that was in priority -- paper water, not water that was available or diverted.
  • Augmentation plans, exchanges and substitute supply plans let a structure divert lawfully while out of priority; none are modelled.
  • Calls on the river this source flows into are included without a position test, so curtailment can be over-reported where the calling point sits above the confluence.
  • DWR's administration is the authority. Scored against DWR's own call analysis, this method agreed on 95.5% of 85,822 structure-days (2026-08-29).
  • Calls considered for this structure: 5336, of which 4859 sit on a river it flows into.

How often is it out of priority?

Across the 11 seasons whose call record is complete enough to judge this structure (2016, 2017, 2018, 2019, 2020, 2021, 2022, 2023, 2024, 2025, 2026), week by week from April.

most senior right · admin 4353.00000 · never out of priority in these seasons
AprMayJunJulAugSep
middle right · admin 5570.00000 · peaks at 9 of 11 seasons
AprMayJunJulAugSep
most junior right · admin 5753.00000 · peaks at 9 of 11 seasons
AprMayJunJulAugSep

Snow sets the clock here. In the driest third of snow years (3 seasons), 2 seasons stayed under call throughout and 0 ended free. In the middle third (5 seasons), the call settled in for the season around June 24 (June 10 to July 15 across those years); in 1 of them it never lifted at all. In the wettest third (3 seasons), the call settled in for the season around June 3 (May 20 to July 8 across those years).

Snow years ranked by the district’s April 1 snow-water percentile across 1 SNOTEL site; 11 seasons carry both a snow reading and a judgeable call record. How the past played out, not a forecast.

Why only 11 seasons, and what the bars mean

Each bar is one week: how many of those seasons that right was out of priority under a call this site can lawfully attribute to this structure. Green is never, red is every season on record.

The short record is a property of DWR's data, not of the river. A call only counts against a structure when we can establish it applies — by the districts named in its set comments, or by stream mile on the same source. DWR did not begin stating affected districts routinely until about 2015: fewer than one call in ten can be judged before then, against roughly two in three since. A season we cannot judge is not a season without calls, so it is dropped rather than counted as quiet — 12 seasons dropped here.

This is a frequency over past seasons, not a forecast. It says nothing about what the division engineer will do this year.

Recorded use (last 13 years on record)

Years far under the decreed amount? That gap has a name — paper water vs. wet water, explained on this structure.

In a median year this structure has a recorded diversion of 640 AF. Its most recent year on record, 2025, came in at 588 AF — 92% of that, and 6th lowest of the 13 years with a recorded volume.

This structure records both diversions and reservoir releases — they are separate water movements and are accounted separately below.

YearDiverted (AFA volume: one acre covered a foot deep, about 326,000 gallons -- roughly a suburban household's outdoor use for a year.)Compared with its own recordReleased (AF)Days recordedPeak (cfs)
2012 383 3rd lowest of 13 · 60% of median 383 245 3.2
2013 772 10th lowest of 13 · 121% of median 772 244 6.4
2014 1 1st lowest of 13 · 0% of median 1 32 0.0
2016 776 11th lowest of 13 · 121% of median 776 214 3.9
2017 851 13th lowest of 13 · 133% of median 851 245 3.2
2018 456 4th lowest of 13 · 71% of median 456 241 3.2
2019 736 9th lowest of 13 · 115% of median 736 245 3.2
2020 327 2nd lowest of 13 · 51% of median 327 216 3.2
2021 651 8th lowest of 13 · 102% of median 651 210 3.2
2022 818 12th lowest of 13 · 128% of median 818 244 3.2
2023 515 5th lowest of 13 · 80% of median 515 200 3.2
2024 640 7th lowest of 13 · 100% of median 640 226 3.2
2025 588 6th lowest of 13 · 92% of median 588 192 3.2

How good is our record of it?

Grade A (9/10 points) — the components below are the finding; the letter alone is not.

The rubric, component by component
CheckStateDetail
identity complete name, type, and water source all on file
decreed rights on file 5 right(s), seniority decoded
diversion record present 2754 measured days; currency unknown (no data-coverage date to compare against)
record continuity continuous 94% of the irrigation seasons in 2012-2025 carry measured days
published-record stability stable no upstream revisions recorded against this structure

Advisory reading aid on public data — not an administrative or legal conclusion, not a title opinion, and not a substitute for DWR administration or an engineer's analysis. Methodology review status is disclosed at hydrohistorian's basin pages.

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