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BEAR CREEK LAKE

Structure dossier · WDID 0903999 · RESERVOIR · 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 13:50 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
BEAR CREEK RESERVOIR (OUTFLOW) BCROUTCO 0.0 cfs 1998–2026, 10,237 days DWR telemetry mapping
BEAR CREEK RESERVOIR BCRRESCO — — co-located, 100 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.

Flowing now

0.0 cfs as of 2026-10-12 11:15 (2.6 h ago)

Zero is a real reading: the gage is reporting, and it says this structure is not diverting right now.

Provisional 15-minute telemetry from BCROUTCO ↗ (BEAR CREEK RESERVOIR (OUTFLOW)). Raw, not the approved record — it is never merged into the diversion history below. DWR publishes the official diversion record after the water year closes and is approved, which is why that record ends months back while this reads minutes ago.

In short

BEAR CREEK LAKE holds 17 decreed rights on BEAR CREEK. As of 2026-09-27, 14 of them are out of priority under a call at admin 4362.00000 placed by PIONEER UNION DITCH. Its 3 most senior rights, back to 1859-11-01, keep diverting. 7 further calls state no district and sit outside this one, so they are counted here rather than assumed either way. In a median year over its last 12 recorded years it diverts 7,583 acre-feet. It was a party to 10 court cases that also touched 28 other structures.

Assembled from the figures on this page — every number above is checked against them before it is shown (11 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 (storage). Faint dots are the neighbouring water; click any to open it.

Dam safety

Dam BEAR CREEK (completed 1979)
Hazard class High
Condition at last inspection Satisfactory (2021-06-01)
Storage restriction None on file
Normal storage 2,000 AF
Physical status Active
Emergency action plan Yes

Source: DWR Dam Safety’s jurisdictional-dam inventory (damsafety/damsafetydaminfojd), refreshed weekly. DWR’s record for this dam carries no WDID and no matched NID id, so it is joined by name and position: “BEAR CREEK” 0.19 mi away. More than half of Colorado’s jurisdictional dams can be reached no other way; judge the match before relying on it. Hazard class describes the consequence of failure, not the likelihood of it. DWR’s dam record.

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?

Under today's controlling call (PIONEER UNION DITCH, priority 1861-12-10): 14 of this structure's 17 rights are out of priority now. (7 call(s) state no district and sit outside this one — not judged, not assumed.) In the 5 past years most like this one (2024, 2022, 2021, 2023, 2025), 5 of the rights shown below were out at least one week in at least one analog year.

Right (priority)NowAnalog years outMajority out by
1859-11-01 3592 ● in priority 0 of 5 —
1861-12-01 4353 ● in priority 0 of 5 —
1861-12-10 4362 ● in priority 0 of 5 —
1862-04-16 4489 ● out 3 of 5 —
1862-09-01 4627 ● out 3 of 5 —
… 9 more rights between these …
1984-07-31 49155 ● out 5 of 5 2026-09-27
1980-09-30 52595 ● out 5 of 5 2026-09-27
2018-11-30 61695 ● out 5 of 5 2026-09-27
How this table is built, and what it is not

“Now” compares each right's admin number with today's most senior applicable active call. The outlook uses flows at PIONEER UNION DITCH around 2026-09-27 (the newest reading on file) — currently 97% of that gage's own median for this window — to pick the 5 most similar past years with complete administration records (2005–2026). Only calls that verifiably apply count: DWR's own district statements in the call's set comments, a caller located in this district, or — on the same stream, where DWR records both stream miles (measured from the mouth) — a caller DOWNSTREAM of this structure. An upstream senior cannot demand water this diversion never deprives it of. Calls that state nothing and sit elsewhere are counted as unjudged rather than assumed, which also means the verified record is shorter than the raw one: early calls rarely state districts. For each week it finds the most senior call then in force; a right is out in that week exactly when that call is senior to it, which is why one line prices every right and juniors can be out while seniors keep diverting. “Majority out by” is the first week out in more than half the analog years. A frequency among named historical years, not a probability from a model, and not a forecast of what the division engineer will do. It says how often years whose flow resembled this one were under a call senior to this right in a given week. Snowpack, storage, and the actual administrative decisions of a given season are not modelled. Check the analog years listed: if they do not resemble this year to you, the outlook does not either.

Where it sits in line

Priority 1859-11-01 — 2nd 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: MCBROOM DITCH (1859-11-01). Immediately behind: CURRIER WELL 2 (1860-05-30).

On MAINSTEM at river mile 37.4, it is 544th of 583 down the reach. Immediately upstream: HOMESTEAD GOLF COURSE PONDS. Immediately downstream: BRIGHTON 18CW3195 RETURN FLOW REPLACEMEN.

Position on the modelled network, not a claim about whose water this is — a stream carries water from many rights at once, and diverted water returns to it.

Decreed rights (17)

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
3592.00000 1859-11-011884-02-04 0.0 cfs 0.0 1.1 cfs Municipal, All beneficial uses 88CW0203
4353.00000 1861-12-011884-02-04 0.2466 cfs 0.0 0.8385 cfs Municipal, Augmentation +1 87CW0301, W8549 +1
4362.00000 1861-12-101884-02-04 0.0 cfs 0.0 0.6116 cfs Irrigation, Municipal +8 94CW0150
4489.00000 1862-04-161884-02-04 0.0 cfs 0.0 0.19 cfs Municipal, All beneficial uses 00CW0023
4627.00000 1862-09-011884-02-04 0.0 cfs 0.0 0.4006 cfs Irrigation, Municipal +8 94CW0150
5418.00000 1864-10-311884-02-04 0.5094 cfs 0.0 1.7296 cfs Municipal, Augmentation +1 87CW0301, W8549 +1
5553.00000 1865-03-151884-02-04 0.0 cfs 0.0 1.2378 cfs Irrigation, Municipal +8 94CW0150
5570.00000 1865-04-011884-02-04 0.2298 cfs 0.0 0.7759 cfs Municipal, Augmentation +1 W8549, 87CW0301 +1
12453.11049 1880-04-011935-09-24 0.0 AF 0.0 86.0 AF Irrigation, Municipal +8 94CW0150
12453.12144 1883-04-011935-09-24 0.0 AF 0.0 73.53 AF Irrigation, Municipal +8 94CW0150
44070.00000 1970-08-291970-12-31 2000.0 AF 0.0 — Municipal, Industrial +2 84CW0167, 14CW3127
47116.44103 1970-10-011979-12-31 1989.0 AF 0.0 — Irrigation, Municipal +3 14CW3127, 79CW0306
48577.47523 1980-02-111983-12-31 200.0 AF 0.0 — Irrigation, Municipal +8 83CW0314, 04CW0116
48910.00000 1983-11-291971-12-31 0.0 cfs 0.0 10.0 cfs Augmentation 83CW0280
49155.00000 1984-07-311984-12-31 0.0 cfs 0.0 1.3 cfs Irrigation, Municipal +4 84CW0221
52595.47755 1980-09-301994-12-31 0.0 cfs 0.0 1.235 cfs Irrigation, Municipal +8 94CW0150
61695.00000 2018-11-302018-12-31 0.0 cfs 0.0 239.4 cfs Municipal 18CW3195

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 0.986 cfs decreed rate, the average day over the last 6 year(s) had 0.884 cfs in priority (90% of the decree). No call in effect is a free river — that was 10.0% of days.

On 276 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 0.44 cfs 45% 0 0
2025 0.74 cfs 75% 2 0
2024 0.88 cfs 89% 110 0
2023 0.99 cfs 100% 68 0
2022 0.99 cfs 100% 3 0
2021 0.99 cfs 100% 0 0
Show the last 120 days, day by day
DateIn priorityControlling call
2026-10-11 0.247 cfs (25%) WARD DITCH, 1862-09-01 · Bear Creek · same source, at or above the calling point
2026-10-10 0.247 cfs (25%) WARD DITCH, 1862-09-01 · Bear Creek · same source, at or above the calling point
2026-10-09 0.247 cfs (25%) WARD DITCH, 1862-09-01 · Bear Creek · same source, at or above the calling point
2026-10-08 0.247 cfs (25%) WARD DITCH, 1862-09-01 · Bear Creek · same source, at or above the calling point
2026-10-07 0.247 cfs (25%) WARD DITCH, 1862-09-01 · Bear Creek · same source, at or above the calling point
2026-10-06 0.247 cfs (25%) WARD DITCH, 1862-09-01 · Bear Creek · same source, at or above the calling point
2026-10-05 0.247 cfs (25%) WARD DITCH, 1862-09-01 · Bear Creek · same source, at or above the calling point
2026-10-04 0.247 cfs (25%) WARD DITCH, 1862-09-01 · Bear Creek · same source, at or above the calling point
2026-10-03 0.247 cfs (25%) WARD DITCH, 1862-09-01 · Bear Creek · same source, at or above the calling point
2026-10-02 0.247 cfs (25%) WARD DITCH, 1862-09-01 · Bear Creek · same source, at or above the calling point
2026-10-01 0.247 cfs (25%) WARD DITCH, 1862-09-01 · Bear Creek · same source, at or above the calling point
2026-09-30 0.247 cfs (25%) WARD DITCH, 1862-09-01 · Bear Creek · same source, at or above the calling point
2026-09-29 0.247 cfs (25%) WARD DITCH, 1862-09-01 · Bear Creek · same source, at or above the calling point
2026-09-28 0.247 cfs (25%) WARD DITCH, 1862-09-01 · Bear Creek · same source, at or above the calling point
2026-09-27 0.247 cfs (25%) WARD DITCH, 1862-09-01 · Bear Creek · same source, at or above the calling point
2026-09-26 0.247 cfs (25%) WARD DITCH, 1862-09-01 · Bear Creek · same source, at or above the calling point
2026-09-25 0.247 cfs (25%) WARD DITCH, 1862-09-01 · Bear Creek · same source, at or above the calling point
2026-09-24 0.247 cfs (25%) WARD DITCH, 1862-09-01 · Bear Creek · same source, at or above the calling point
2026-09-23 0.247 cfs (25%) WARD DITCH, 1862-09-01 · Bear Creek · same source, at or above the calling point
2026-09-22 0.247 cfs (25%) WARD DITCH, 1862-09-01 · Bear Creek · same source, at or above the calling point
2026-09-21 0.247 cfs (25%) WARD DITCH, 1862-09-01 · Bear Creek · same source, at or above the calling point
2026-09-20 0.247 cfs (25%) WARD DITCH, 1862-09-01 · Bear Creek · same source, at or above the calling point
2026-09-19 0.247 cfs (25%) WARD DITCH, 1862-09-01 · Bear Creek · same source, at or above the calling point
2026-09-18 0.247 cfs (25%) WARD DITCH, 1862-09-01 · Bear Creek · same source, at or above the calling point
2026-09-17 0.247 cfs (25%) WARD DITCH, 1862-09-01 · Bear Creek · same source, at or above the calling point
2026-09-16 0.247 cfs (25%) WARD DITCH, 1862-09-01 · Bear Creek · same source, at or above the calling point
2026-09-15 0.247 cfs (25%) WARD DITCH, 1862-09-01 · Bear Creek · same source, at or above the calling point
2026-09-14 0.247 cfs (25%) WARD DITCH, 1862-09-01 · Bear Creek · same source, at or above the calling point
2026-09-13 0.247 cfs (25%) WARD DITCH, 1862-09-01 · Bear Creek · same source, at or above the calling point
2026-09-12 0.247 cfs (25%) WARD DITCH, 1862-09-01 · Bear Creek · same source, at or above the calling point
2026-09-11 0.247 cfs (25%) WARD DITCH, 1862-09-01 · Bear Creek · same source, at or above the calling point
2026-09-10 0.247 cfs (25%) WARD DITCH, 1862-09-01 · Bear Creek · same source, at or above the calling point
2026-09-09 0.247 cfs (25%) WARD DITCH, 1862-09-01 · Bear Creek · same source, at or above the calling point
2026-09-08 0.247 cfs (25%) WARD DITCH, 1862-09-01 · Bear Creek · same source, at or above the calling point
2026-09-07 0.247 cfs (25%) WARD DITCH, 1862-09-01 · Bear Creek · same source, at or above the calling point
2026-09-06 0.247 cfs (25%) WARD DITCH, 1862-09-01 · Bear Creek · same source, at or above the calling point
2026-09-05 0.247 cfs (25%) WARD DITCH, 1862-09-01 · Bear Creek · same source, at or above the calling point
2026-09-04 0.247 cfs (25%) WARD DITCH, 1862-09-01 · Bear Creek · same source, at or above the calling point
2026-09-03 0.247 cfs (25%) WARD DITCH, 1862-09-01 · Bear Creek · same source, at or above the calling point
2026-09-02 0.247 cfs (25%) WARD DITCH, 1862-09-01 · Bear Creek · same source, at or above the calling point
2026-09-01 0.247 cfs (25%) WARD DITCH, 1862-09-01 · Bear Creek · same source, at or above the calling point
2026-08-31 0.247 cfs (25%) WARD DITCH, 1862-09-01 · Bear Creek · same source, at or above the calling point
2026-08-30 0.247 cfs (25%) WARD DITCH, 1862-09-01 · Bear Creek · same source, at or above the calling point
2026-08-29 0.247 cfs (25%) WARD DITCH, 1862-09-01 · Bear Creek · same source, at or above the calling point
2026-08-28 0.247 cfs (25%) WARD DITCH, 1862-09-01 · Bear Creek · same source, at or above the calling point
2026-08-27 0.247 cfs (25%) WARD DITCH, 1862-09-01 · Bear Creek · same source, at or above the calling point
2026-08-26 0.247 cfs (25%) WARD DITCH, 1862-09-01 · Bear Creek · same source, at or above the calling point
2026-08-25 0.247 cfs (25%) WARD DITCH, 1862-09-01 · Bear Creek · same source, at or above the calling point
2026-08-24 0.247 cfs (25%) WARD DITCH, 1862-09-01 · Bear Creek · same source, at or above the calling point
2026-08-23 0.247 cfs (25%) WARD DITCH, 1862-09-01 · Bear Creek · same source, at or above the calling point
2026-08-22 0.247 cfs (25%) WARD DITCH, 1862-09-01 · Bear Creek · same source, at or above the calling point
2026-08-21 0.247 cfs (25%) WARD DITCH, 1862-09-01 · Bear Creek · same source, at or above the calling point
2026-08-20 0.247 cfs (25%) WARD DITCH, 1862-09-01 · Bear Creek · same source, at or above the calling point
2026-08-19 0.247 cfs (25%) WARD DITCH, 1862-09-01 · Bear Creek · same source, at or above the calling point
2026-08-18 0.247 cfs (25%) WARD DITCH, 1862-09-01 · Bear Creek · same source, at or above the calling point
2026-08-17 0.493 cfs (50%) WARD DITCH, 1862-09-01 · Bear Creek · same source, at or above the calling point
2026-08-16 0.986 cfs (100%) HARRIMAN DITCH, 1865-10-01 · Bear Creek · same source, at or above the calling point
2026-08-15 0.909 cfs (92%) HARRIMAN DITCH, 1864-10-31 · Bear Creek · same source, at or above the calling point
2026-08-14 0.586 cfs (59%) HARRIMAN DITCH, 1861-12-01 · Bear Creek · same source, at or above the calling point
2026-08-13 0.247 cfs (25%) HARRIMAN DITCH, 1861-12-01 · Bear Creek · same source, at or above the calling point
2026-08-12 0.247 cfs (25%) HARRIMAN DITCH, 1861-12-01 · Bear Creek · same source, at or above the calling point
2026-08-11 0.247 cfs (25%) HARRIMAN DITCH, 1861-12-01 · Bear Creek · same source, at or above the calling point
2026-08-10 0.247 cfs (25%) HARRIMAN DITCH, 1861-12-01 · Bear Creek · same source, at or above the calling point
2026-08-09 0.247 cfs (25%) HARRIMAN DITCH, 1861-12-01 · Bear Creek · same source, at or above the calling point
2026-08-08 0.247 cfs (25%) HARRIMAN DITCH, 1861-12-01 · Bear Creek · same source, at or above the calling point
2026-08-07 0.247 cfs (25%) HARRIMAN DITCH, 1861-12-01 · Bear Creek · same source, at or above the calling point
2026-08-06 0.247 cfs (25%) HARRIMAN DITCH, 1861-12-01 · Bear Creek · same source, at or above the calling point
2026-08-05 0.247 cfs (25%) HARRIMAN DITCH, 1861-12-01 · Bear Creek · same source, at or above the calling point
2026-08-04 0.247 cfs (25%) HARRIMAN DITCH, 1861-12-01 · Bear Creek · same source, at or above the calling point
2026-08-03 0.247 cfs (25%) HARRIMAN DITCH, 1861-12-01 · Bear Creek · same source, at or above the calling point
2026-08-02 0.247 cfs (25%) HARRIMAN DITCH, 1861-12-01 · Bear Creek · same source, at or above the calling point
2026-08-01 0.247 cfs (25%) HARRIMAN DITCH, 1861-12-01 · Bear Creek · same source, at or above the calling point
2026-07-31 0.247 cfs (25%) PIONEER UNION DITCH, 1861-12-10 · Bear Creek · same source, at or above the calling point
2026-07-30 0.247 cfs (25%) PIONEER UNION DITCH, 1861-12-10 · Bear Creek · same source, at or above the calling point
2026-07-29 0.247 cfs (25%) HARRIMAN DITCH, 1861-12-01 · Bear Creek · same source, at or above the calling point
2026-07-28 0.247 cfs (25%) HARRIMAN DITCH, 1861-12-01 · Bear Creek · same source, at or above the calling point
2026-07-27 0.247 cfs (25%) HARRIMAN DITCH, 1861-12-01 · Bear Creek · same source, at or above the calling point
2026-07-26 0.247 cfs (25%) HARRIMAN DITCH, 1861-12-01 · Bear Creek · same source, at or above the calling point
2026-07-25 0.247 cfs (25%) HARRIMAN DITCH, 1861-12-01 · Bear Creek · same source, at or above the calling point
2026-07-24 0.247 cfs (25%) HARRIMAN DITCH, 1861-12-01 · Bear Creek · same source, at or above the calling point
2026-07-23 0.247 cfs (25%) HARRIMAN DITCH, 1861-12-01 · Bear Creek · same source, at or above the calling point
2026-07-22 0.247 cfs (25%) HARRIMAN DITCH, 1861-12-01 · Bear Creek · same source, at or above the calling point
2026-07-21 0.247 cfs (25%) HARRIMAN DITCH, 1861-12-01 · Bear Creek · same source, at or above the calling point
2026-07-20 0.247 cfs (25%) HARRIMAN DITCH, 1861-12-01 · Bear Creek · same source, at or above the calling point
2026-07-19 0.164 cfs (17%) SOUTH PLATTE RIVER AT WATERTON, 1860-12-31 · South Platte River · on a river this source flows into
2026-07-18 0.082 cfs (8%) SOUTH PLATTE RIVER AT WATERTON, 1860-12-31 · South Platte River · on a river this source flows into
2026-07-17 0.247 cfs (25%) HARRIMAN DITCH, 1861-12-01 · Bear Creek · same source, at or above the calling point
2026-07-16 0.247 cfs (25%) HARRIMAN DITCH, 1861-12-01 · Bear Creek · same source, at or above the calling point
2026-07-15 0.247 cfs (25%) HARRIMAN DITCH, 1861-12-01 · Bear Creek · same source, at or above the calling point
2026-07-14 0.247 cfs (25%) HARRIMAN DITCH, 1861-12-01 · Bear Creek · same source, at or above the calling point
2026-07-13 0.247 cfs (25%) HARRIMAN DITCH, 1861-12-01 · Bear Creek · same source, at or above the calling point
2026-07-12 0.247 cfs (25%) HARRIMAN DITCH, 1861-12-01 · Bear Creek · same source, at or above the calling point
2026-07-11 0.247 cfs (25%) HARRIMAN DITCH, 1861-12-01 · Bear Creek · same source, at or above the calling point
2026-07-10 0.247 cfs (25%) HARRIMAN DITCH, 1861-12-01 · Bear Creek · same source, at or above the calling point
2026-07-09 0.247 cfs (25%) HARRIMAN DITCH, 1861-12-01 · Bear Creek · same source, at or above the calling point
2026-07-08 0.247 cfs (25%) HARRIMAN DITCH, 1861-12-01 · Bear Creek · same source, at or above the calling point
2026-07-07 0.247 cfs (25%) HARRIMAN DITCH, 1861-12-01 · Bear Creek · same source, at or above the calling point
2026-07-06 0.247 cfs (25%) HARRIMAN DITCH, 1861-12-01 · Bear Creek · same source, at or above the calling point
2026-07-05 0.247 cfs (25%) HARRIMAN DITCH, 1861-12-01 · Bear Creek · same source, at or above the calling point
2026-07-04 0.247 cfs (25%) HARRIMAN DITCH, 1861-12-01 · Bear Creek · same source, at or above the calling point
2026-07-03 0.247 cfs (25%) HARRIMAN DITCH, 1861-12-01 · Bear Creek · same source, at or above the calling point
2026-07-02 0.247 cfs (25%) HARRIMAN DITCH, 1861-12-01 · Bear Creek · same source, at or above the calling point
2026-07-01 0.247 cfs (25%) HARRIMAN DITCH, 1861-12-01 · Bear Creek · same source, at or above the calling point
2026-06-30 0.247 cfs (25%) HARRIMAN DITCH, 1861-12-10 · Bear Creek · same source, at or above the calling point
2026-06-29 0.247 cfs (25%) HARRIMAN DITCH, 1861-12-01 · Bear Creek · same source, at or above the calling point
2026-06-28 0.493 cfs (50%) HARRIMAN DITCH, 1861-12-01 · Bear Creek · same source, at or above the calling point
2026-06-27 0.986 cfs (100%) HARRIMAN DITCH, 1865-10-01 · Bear Creek · same source, at or above the calling point
2026-06-26 0.986 cfs (100%) WESTERN MUTUAL DITCH, 1871-10-05 · South Platte River · on a river this source flows into
2026-06-25 0.739 cfs (75%) HARRIMAN DITCH, 1861-12-01 · Bear Creek · same source, at or above the calling point
2026-06-24 0.247 cfs (25%) HARRIMAN DITCH, 1861-12-01 · Bear Creek · same source, at or above the calling point
2026-06-23 0.247 cfs (25%) HARRIMAN DITCH, 1861-12-01 · Bear Creek · same source, at or above the calling point
2026-06-22 0.247 cfs (25%) HARRIMAN DITCH, 1861-12-01 · Bear Creek · same source, at or above the calling point
2026-06-21 0.247 cfs (25%) HARRIMAN DITCH, 1861-12-01 · Bear Creek · same source, at or above the calling point
2026-06-20 0.247 cfs (25%) HARRIMAN DITCH, 1861-12-01 · Bear Creek · same source, at or above the calling point
2026-06-19 0.247 cfs (25%) HARRIMAN DITCH, 1861-12-01 · Bear Creek · same source, at or above the calling point
2026-06-18 0.247 cfs (25%) HARRIMAN DITCH, 1861-12-01 · Bear Creek · same source, at or above the calling point
2026-06-17 0.247 cfs (25%) HARRIMAN DITCH, 1861-12-01 · Bear Creek · same source, at or above the calling point
2026-06-16 0.247 cfs (25%) HARRIMAN DITCH, 1861-12-01 · Bear Creek · same source, at or above the calling point
2026-06-15 0.247 cfs (25%) HARRIMAN DITCH, 1861-12-01 · Bear Creek · same source, at or above the calling point
2026-06-14 0.247 cfs (25%) 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: 5355, 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 3592.00000 · never out of priority in these seasons
AprMayJunJulAugSep
middle right · admin 12453.11049 · peaks at 11 of 11 seasons
AprMayJunJulAugSep
most junior right · admin 61695.00000 · peaks at 11 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 7,583 AF. Its most recent year on record, 2025, came in at 12,221 AF — 161% of that, and 9th lowest of the 12 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)
2000 59 1st lowest of 12 · 1% of median 37 18 3.0
2002 — no recorded volume 203 0 —
2015 2,170 4th lowest of 12 · 29% of median — 61 30.5
2016 33,106 12th lowest of 12 · 437% of median — 191 368.5
2017 6,509 6th lowest of 12 · 86% of median — 64 155.5
2018 1,115 3rd lowest of 12 · 15% of median — 53 78.3
2019 9,850 8th lowest of 12 · 130% of median — 119 132.8
2020 2,171 5th lowest of 12 · 29% of median — 49 56.5
2021 8,657 7th lowest of 12 · 114% of median — 29 221.2
2022 382 2nd lowest of 12 · 5% of median — 18 54.8
2023 31,280 11th lowest of 12 · 412% of median — 146 542.7
2024 26,418 10th lowest of 12 · 348% of median — 366 221.7
2025 12,221 9th lowest of 12 · 161% of median — 304 126.5

How good is our record of it?

Grade B (8/10 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 17 right(s), seniority decoded
diversion record current 1418 measured days, newest 331 day(s) before the data's end (DWR publishes ~1 year in arrears)
record continuity sparse 26% of the irrigation seasons in 2000-2025 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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