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ST VRAIN CREEK

Structure dossier · WDID 0502413 · OTHER · SAINT VRAIN CREEK · DWR record

St Vrain Creek is a water structure on Saint Vrain Creek in Colorado. This page is its public record: the water it has a right to, whether it may take it today, and its history, compiled from the Colorado Division of Water Resources.

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 2026-10-14 18:44 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
ST VRAIN PALMERTON DITCH 0500528A — — co-located, 37 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

ST VRAIN CREEK holds 4 decreed rights on SAINT VRAIN CREEK. A call at SOUTH FLAT DITCH on SAINT VRAIN CREEK (1864-01-01), and 1 other currently reaches it: fully 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. It was a party to 8 court cases that also touched 37 other structures.

Assembled from the figures on this page — every number above is checked against them before it is shown (6 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

● Fully called out — call at SOUTH FLAT DITCH (SAINT VRAIN CREEK, priority 1864-01-01).

● Fully called out — call at CLOUGH/TRUE DITCH (SAINT VRAIN CREEK, priority 1862-04-14).

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 1865-05-01 — 75th most senior of the 1290 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: ISLAND DITCH (1864-06-15). Immediately behind: DOUBLE JK RANCH POND 1 (1865-05-01).

Decreed rights (4)

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
5600.00000 1865-05-011882-06-02 0.144 cfs 0.0 — Irrigation, Municipal +7 85CW0229, 86CW0390 +1
5630.00000 1865-05-311882-06-02 0.1821 cfs 0.0 0.07 cfs Irrigation, Municipal +7 89CW0138, 90CW0157 +2
5995.00000 1866-05-311882-06-02 0.2706 cfs 0.0 0.1 cfs Irrigation, Municipal +6 89CW0138, 87CW0133 +2
8947.00000 1874-06-301882-06-02 0.4206 cfs 0.0 0.18 cfs Irrigation, Municipal +7 87CW0133, 90CW0166 +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 1.017 cfs decreed rate, the average day over the last 6 year(s) had 0.787 cfs in priority (77% of the decree). No call in effect is a free river — that was 9.4% of days.

On 618 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 28 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 0.45 cfs 45% 1 74
2025 0.64 cfs 63% 39 2
2024 0.77 cfs 76% 39 0
2023 0.81 cfs 79% 60 0
2022 0.74 cfs 72% 31 23
2021 0.79 cfs 78% 1 17
Show the last 120 days, day by day
DateIn priorityControlling call
2026-10-14 0.0 cfs (0%) ZWECK TURNER DITCH, 1864-06-30 · Saint Vrain Creek · same source, at or above the calling point
2026-10-13 0.0 cfs (0%) ZWECK TURNER DITCH, 1864-06-30 · Saint Vrain Creek · same source, at or above the calling point
2026-10-12 0.0 cfs (0%) ZWECK TURNER DITCH, 1864-06-30 · Saint Vrain Creek · same source, at or above the calling point
2026-10-11 0.0 cfs (0%) ZWECK TURNER DITCH, 1864-06-30 · Saint Vrain Creek · same source, at or above the calling point
2026-10-10 0.0 cfs (0%) ZWECK TURNER DITCH, 1864-06-30 · Saint Vrain Creek · same source, at or above the calling point
2026-10-09 0.0 cfs (0%) ZWECK TURNER DITCH, 1864-06-30 · Saint Vrain Creek · same source, at or above the calling point
2026-10-08 0.0 cfs (0%) ZWECK TURNER DITCH, 1864-06-30 · Saint Vrain Creek · same source, at or above the calling point
2026-10-07 0.0 cfs (0%) ZWECK TURNER DITCH, 1864-06-30 · Saint Vrain Creek · same source, at or above the calling point
2026-10-06 0.0 cfs (0%) ZWECK TURNER DITCH, 1864-06-30 · Saint Vrain Creek · same source, at or above the calling point
2026-10-05 0.0 cfs (0%) ZWECK TURNER DITCH, 1864-06-30 · Saint Vrain Creek · same source, at or above the calling point
2026-10-04 0.0 cfs (0%) ZWECK TURNER DITCH, 1864-06-30 · Saint Vrain Creek · same source, at or above the calling point
2026-10-03 0.0 cfs (0%) ZWECK TURNER DITCH, 1864-06-30 · Saint Vrain Creek · same source, at or above the calling point
2026-10-02 0.0 cfs (0%) ZWECK TURNER DITCH, 1864-06-30 · Saint Vrain Creek · same source, at or above the calling point
2026-10-01 0.0 cfs (0%) ZWECK TURNER DITCH, 1864-06-30 · Saint Vrain Creek · same source, at or above the calling point
2026-09-30 0.0 cfs (0%) ZWECK TURNER DITCH, 1864-06-30 · Saint Vrain Creek · same source, at or above the calling point
2026-09-29 0.0 cfs (0%) ZWECK TURNER DITCH, 1864-06-30 · Saint Vrain Creek · same source, at or above the calling point
2026-09-28 0.0 cfs (0%) ZWECK TURNER DITCH, 1864-06-30 · Saint Vrain Creek · same source, at or above the calling point
2026-09-27 0.0 cfs (0%) ZWECK TURNER DITCH, 1864-06-30 · Saint Vrain Creek · same source, at or above the calling point
2026-09-26 0.0 cfs (0%) ZWECK TURNER DITCH, 1864-06-30 · Saint Vrain Creek · same source, at or above the calling point
2026-09-25 0.0 cfs (0%) ZWECK TURNER DITCH, 1864-06-30 · Saint Vrain Creek · same source, at or above the calling point
2026-09-24 0.0 cfs (0%) ZWECK TURNER DITCH, 1864-06-30 · Saint Vrain Creek · same source, at or above the calling point
2026-09-23 0.0 cfs (0%) ZWECK TURNER DITCH, 1864-06-30 · Saint Vrain Creek · same source, at or above the calling point
2026-09-22 0.0 cfs (0%) ZWECK TURNER DITCH, 1864-06-30 · Saint Vrain Creek · same source, at or above the calling point
2026-09-21 0.0 cfs (0%) ZWECK TURNER DITCH, 1864-06-30 · Saint Vrain Creek · same source, at or above the calling point
2026-09-20 0.0 cfs (0%) ZWECK TURNER DITCH, 1864-06-30 · Saint Vrain Creek · same source, at or above the calling point
2026-09-19 0.0 cfs (0%) ZWECK TURNER DITCH, 1864-06-30 · Saint Vrain Creek · same source, at or above the calling point
2026-09-18 0.0 cfs (0%) ZWECK TURNER DITCH, 1864-06-30 · Saint Vrain Creek · same source, at or above the calling point
2026-09-17 0.0 cfs (0%) ZWECK TURNER DITCH, 1864-06-30 · Saint Vrain Creek · same source, at or above the calling point
2026-09-16 0.0 cfs (0%) ZWECK TURNER DITCH, 1864-06-30 · Saint Vrain Creek · same source, at or above the calling point
2026-09-15 0.0 cfs (0%) ZWECK TURNER DITCH, 1864-06-30 · Saint Vrain Creek · same source, at or above the calling point
2026-09-14 0.0 cfs (0%) ZWECK TURNER DITCH, 1864-06-30 · Saint Vrain Creek · same source, at or above the calling point
2026-09-13 0.0 cfs (0%) ZWECK TURNER DITCH, 1864-06-30 · Saint Vrain Creek · same source, at or above the calling point
2026-09-12 0.0 cfs (0%) ZWECK TURNER DITCH, 1864-06-30 · Saint Vrain Creek · same source, at or above the calling point
2026-09-11 0.0 cfs (0%) ZWECK TURNER DITCH, 1864-06-30 · Saint Vrain Creek · same source, at or above the calling point
2026-09-10 0.0 cfs (0%) ZWECK TURNER DITCH, 1864-06-30 · Saint Vrain Creek · same source, at or above the calling point
2026-09-09 0.0 cfs (0%) ZWECK TURNER DITCH, 1864-06-30 · Saint Vrain Creek · same source, at or above the calling point
2026-09-08 0.0 cfs (0%) ZWECK TURNER DITCH, 1864-06-30 · Saint Vrain Creek · same source, at or above the calling point
2026-09-07 0.0 cfs (0%) ZWECK TURNER DITCH, 1864-06-30 · Saint Vrain Creek · same source, at or above the calling point
2026-09-06 0.0 cfs (0%) ZWECK TURNER DITCH, 1864-06-30 · Saint Vrain Creek · same source, at or above the calling point
2026-09-05 0.0 cfs (0%) ZWECK TURNER DITCH, 1864-06-30 · Saint Vrain Creek · same source, at or above the calling point
2026-09-04 0.0 cfs (0%) ZWECK TURNER DITCH, 1864-06-30 · Saint Vrain Creek · same source, at or above the calling point
2026-09-03 0.0 cfs (0%) ZWECK TURNER DITCH, 1864-06-30 · Saint Vrain Creek · same source, at or above the calling point
2026-09-02 0.0 cfs (0%) ZWECK TURNER DITCH, 1864-06-30 · Saint Vrain Creek · same source, at or above the calling point
2026-09-01 0.0 cfs (0%) ZWECK TURNER DITCH, 1864-06-30 · Saint Vrain Creek · same source, at or above the calling point
2026-08-31 0.0 cfs (0%) ZWECK TURNER DITCH, 1864-06-30 · Saint Vrain Creek · same source, at or above the calling point
2026-08-30 0.0 cfs (0%) ZWECK TURNER DITCH, 1864-06-30 · Saint Vrain Creek · same source, at or above the calling point
2026-08-29 0.0 cfs (0%) ZWECK TURNER DITCH, 1864-06-30 · Saint Vrain Creek · same source, at or above the calling point
2026-08-28 0.0 cfs (0%) ZWECK TURNER DITCH, 1864-06-30 · Saint Vrain Creek · same source, at or above the calling point
2026-08-27 0.0 cfs (0%) ZWECK TURNER DITCH, 1864-06-30 · Saint Vrain Creek · same source, at or above the calling point
2026-08-26 0.0 cfs (0%) ZWECK TURNER DITCH, 1864-06-30 · Saint Vrain Creek · same source, at or above the calling point
2026-08-25 0.0 cfs (0%) ZWECK TURNER DITCH, 1864-06-30 · Saint Vrain Creek · same source, at or above the calling point
2026-08-24 0.0 cfs (0%) ZWECK TURNER DITCH, 1864-06-30 · Saint Vrain Creek · same source, at or above the calling point
2026-08-23 0.0 cfs (0%) ZWECK TURNER DITCH, 1864-06-30 · Saint Vrain Creek · same source, at or above the calling point
2026-08-22 0.0 cfs (0%) ZWECK TURNER DITCH, 1864-06-30 · Saint Vrain Creek · same source, at or above the calling point
2026-08-21 0.0 cfs (0%) ZWECK TURNER DITCH, 1864-06-30 · Saint Vrain Creek · same source, at or above the calling point
2026-08-20 0.0 cfs (0%) ZWECK TURNER DITCH, 1864-06-30 · Saint Vrain Creek · same source, at or above the calling point
2026-08-19 0.0 cfs (0%) ZWECK TURNER DITCH, 1864-06-30 · Saint Vrain Creek · same source, at or above the calling point
2026-08-18 0.0 cfs (0%) ZWECK TURNER DITCH, 1864-06-30 · Saint Vrain Creek · same source, at or above the calling point
2026-08-17 0.0 cfs (0%) ZWECK TURNER DITCH, 1864-06-30 · Saint Vrain Creek · same source, at or above the calling point
2026-08-16 0.0 cfs (0%) ZWECK TURNER DITCH, 1864-06-30 · Saint Vrain Creek · same source, at or above the calling point
2026-08-15 0.0 cfs (0%) ZWECK TURNER DITCH, 1864-06-30 · Saint Vrain Creek · same source, at or above the calling point
2026-08-14 0.0 cfs (0%) ZWECK TURNER DITCH, 1864-06-30 · Saint Vrain Creek · same source, at or above the calling point
2026-08-13 0.0 cfs (0%) ZWECK TURNER DITCH, 1864-06-30 · Saint Vrain Creek · same source, at or above the calling point
2026-08-12 0.0 cfs (0%) ZWECK TURNER DITCH, 1864-06-30 · Saint Vrain Creek · same source, at or above the calling point
2026-08-11 0.0 cfs (0%) ZWECK TURNER DITCH, 1864-06-30 · Saint Vrain Creek · same source, at or above the calling point
2026-08-10 0.0 cfs (0%) ZWECK TURNER DITCH, 1864-06-30 · Saint Vrain Creek · same source, at or above the calling point
2026-08-09 0.0 cfs (0%) ZWECK TURNER DITCH, 1864-06-30 · Saint Vrain Creek · same source, at or above the calling point
2026-08-08 0.0 cfs (0%) ZWECK TURNER DITCH, 1864-06-30 · Saint Vrain Creek · same source, at or above the calling point
2026-08-07 0.199 cfs (20%) ZWECK TURNER DITCH, 1864-06-30 · Saint Vrain Creek · same source, at or above the calling point
2026-08-06 0.597 cfs (59%) SECTION NO 3 DITCH, 1873-09-26 · South Platte River · on a river this source flows into
2026-08-05 0.597 cfs (59%) SECTION NO 3 DITCH, 1873-09-26 · South Platte River · on a river this source flows into
2026-08-04 0.597 cfs (59%) SECTION NO 3 DITCH, 1873-09-26 · South Platte River · on a river this source flows into
2026-08-03 0.597 cfs (59%) SECTION NO 3 DITCH, 1873-09-26 · South Platte River · on a river this source flows into
2026-08-02 0.507 cfs (50%) NIWOT DITCH, 1865-06-01 · Saint Vrain Creek · same source, at or above the calling point
2026-08-01 0.326 cfs (32%) NIWOT DITCH, 1865-06-01 · Saint Vrain Creek · same source, at or above the calling point
2026-07-31 0.326 cfs (32%) NIWOT DITCH, 1865-06-01 · Saint Vrain Creek · same source, at or above the calling point
2026-07-30 0.416 cfs (41%) NIWOT DITCH, 1865-06-01 · Saint Vrain Creek · same source, at or above the calling point
2026-07-29 0.597 cfs (59%) SECTION NO 3 DITCH, 1873-09-26 · South Platte River · on a river this source flows into
2026-07-28 0.597 cfs (59%) SECTION NO 3 DITCH, 1873-09-26 · South Platte River · on a river this source flows into
2026-07-27 0.597 cfs (59%) SECTION NO 3 DITCH, 1873-09-26 · South Platte River · on a river this source flows into
2026-07-26 0.597 cfs (59%) SECTION NO 3 DITCH, 1873-09-26 · South Platte River · on a river this source flows into
2026-07-25 0.597 cfs (59%) SECTION NO 3 DITCH, 1873-09-26 · South Platte River · on a river this source flows into
2026-07-24 0.597 cfs (59%) SECTION NO 3 DITCH, 1873-09-26 · South Platte River · on a river this source flows into
2026-07-23 0.597 cfs (59%) SECTION NO 3 DITCH, 1873-09-26 · South Platte River · on a river this source flows into
2026-07-22 0.446 cfs (44%) LONGMONT SUPPLY DITCH, 1865-05-01 · Saint Vrain Creek · same source, at or above the calling point
2026-07-21 0.144 cfs (14%) LONGMONT SUPPLY DITCH, 1865-05-01 · Saint Vrain Creek · same source, at or above the calling point
2026-07-20 0.295 cfs (29%) LONGMONT SUPPLY DITCH, 1865-05-01 · Saint Vrain Creek · same source, at or above the calling point
2026-07-19 0.507 cfs (50%) NIWOT DITCH, 1865-06-01 · Saint Vrain Creek · same source, at or above the calling point
2026-07-18 0.326 cfs (32%) NIWOT DITCH, 1865-06-01 · Saint Vrain Creek · same source, at or above the calling point
2026-07-17 0.326 cfs (32%) NIWOT DITCH, 1865-06-01 · Saint Vrain Creek · same source, at or above the calling point
2026-07-16 0.326 cfs (32%) NIWOT DITCH, 1865-06-01 · Saint Vrain Creek · same source, at or above the calling point
2026-07-15 0.416 cfs (41%) NIWOT DITCH, 1865-06-01 · Saint Vrain Creek · same source, at or above the calling point
2026-07-14 0.597 cfs (59%) OLIGARCHY DITCH, 1866-06-01 · Saint Vrain Creek · same source, at or above the calling point
2026-07-13 0.597 cfs (59%) JAMES DITCH, 1868-06-30 · Saint Vrain Creek · same source, at or above the calling point
2026-07-12 0.597 cfs (59%) JAMES DITCH, 1868-06-30 · Saint Vrain Creek · same source, at or above the calling point
2026-07-11 0.597 cfs (59%) JAMES DITCH, 1868-06-30 · Saint Vrain Creek · same source, at or above the calling point
2026-07-10 0.597 cfs (59%) JAMES DITCH, 1868-06-30 · Saint Vrain Creek · same source, at or above the calling point
2026-07-09 0.597 cfs (59%) JAMES DITCH, 1868-06-30 · Saint Vrain Creek · same source, at or above the calling point
2026-07-08 0.597 cfs (59%) JAMES DITCH, 1868-06-30 · Saint Vrain Creek · same source, at or above the calling point
2026-07-07 0.597 cfs (59%) JAMES DITCH, 1868-06-30 · Saint Vrain Creek · same source, at or above the calling point
2026-07-06 0.737 cfs (72%) JAMES DITCH, 1868-06-30 · Saint Vrain Creek · same source, at or above the calling point
2026-07-05 1.017 cfs (100%) LOWER LATHAM DITCH, 1877-11-14 · South Platte River · on a river this source flows into
2026-07-04 1.017 cfs (100%) LOWER LATHAM DITCH, 1877-11-14 · South Platte River · on a river this source flows into
2026-07-03 0.877 cfs (86%) SWEDE DITCH, 1871-05-01 · Saint Vrain Creek · same source, at or above the calling point
2026-07-02 0.597 cfs (59%) SWEDE DITCH, 1871-05-01 · Saint Vrain Creek · same source, at or above the calling point
2026-07-01 0.597 cfs (59%) SWEDE DITCH, 1871-05-01 · Saint Vrain Creek · same source, at or above the calling point
2026-06-30 0.597 cfs (59%) SWEDE DITCH, 1871-05-01 · Saint Vrain Creek · same source, at or above the calling point
2026-06-29 0.807 cfs (79%) SWEDE DITCH, 1871-05-01 · Saint Vrain Creek · same source, at or above the calling point
2026-06-28 1.017 cfs (100%) HARMONY DITCH 1, 1897-05-03 · South Platte River · on a river this source flows into
2026-06-27 1.017 cfs (100%) HARMONY DITCH 1, 1897-05-03 · South Platte River · on a river this source flows into
2026-06-26 1.017 cfs (100%) LOWER LATHAM DITCH, 1877-11-14 · South Platte River · on a river this source flows into
2026-06-25 1.017 cfs (100%) LOWER LATHAM DITCH, 1877-11-14 · South Platte River · on a river this source flows into
2026-06-24 1.017 cfs (100%) LOWER LATHAM DITCH, 1877-11-14 · South Platte River · on a river this source flows into
2026-06-23 1.017 cfs (100%) LOWER LATHAM DITCH, 1877-11-14 · South Platte River · on a river this source flows into
2026-06-22 1.017 cfs (100%) LOWER LATHAM DITCH, 1877-11-14 · South Platte River · on a river this source flows into
2026-06-21 1.017 cfs (100%) LOWER LATHAM DITCH, 1877-11-14 · South Platte River · on a river this source flows into
2026-06-20 1.017 cfs (100%) LOWER LATHAM DITCH, 1877-11-14 · South Platte River · on a river this source flows into
2026-06-19 1.017 cfs (100%) LOWER LATHAM DITCH, 1877-11-14 · South Platte River · on a river this source flows into
2026-06-18 1.017 cfs (100%) LOWER LATHAM DITCH, 1877-11-14 · South Platte River · on a river this source flows into
2026-06-17 1.017 cfs (100%) LOWER LATHAM DITCH, 1877-11-14 · South Platte River · on a river this source flows into
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: 3443, of which 2844 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 5600.00000 · peaks at 2 of 11 seasons
AprMayJunJulAugSep
middle right · admin 5995.00000 · peaks at 9 of 11 seasons
AprMayJunJulAugSep
most junior right · admin 8947.00000 · peaks at 11 of 11 seasons
AprMayJunJulAugSep

Snow sets the clock here. In the driest third of snow years (3 seasons), the call settled in for the season around June 17 (June 3 to June 17 across those years). In the middle third (5 seasons), the call settled in for the season around June 24 (June 17 to June 24 across those years); in 3 of them it never lifted at all. In the wettest third (3 seasons), the call settled in for the season around July 8 (June 17 to July 8 across those years).

Snow years ranked by the district’s April 1 snow-water percentile across 3 SNOTEL sites; 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.

How good is our record of it?

Grade C (6/10 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 4 right(s), seniority decoded
diversion record absent no diversion records cached
record continuity unknown no record span to measure against
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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