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SEVENTY FIVE DITCH

Structure dossier · WDID 5900668 · DITCH · GUNNISON RIVER · DWR record

Seventy Five Ditch is a ditch on Gunnison River 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 2026-10-24 03:46 by Hydrohistorian. Sources: DWR HydroBase snapshot HydroBase_CO_20260928 (history) + CDSS REST (current), USGS NWIS cross-checks. Engine v0.5.0 (7055959) — every figure regenerates from this named code version and data image.

In short

SEVENTY FIVE DITCH holds 3 decreed rights on GUNNISON RIVER. No active call senior to its rights reaches its district today (12 active calls checked), so it is in priority now. 11 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 15 recorded years it diverts 4,315 acre-feet. It was a party to 2 court cases that also touched 2 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 (diversion). Faint dots are the neighbouring water; click any to open it.

Current administration

● In priority — no active call senior to this structure's rights affects its district (12 active call(s) checked).

11 further calls state no district and sit outside this one, so they are counted here rather than assumed either way.

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 1875-05-10 — 1st most senior of the 2360 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 behind: JOHN B OUTCALT NO 1 D (1875-07-31).

Decreed rights (3)

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
9261.00000 1875-05-101906-09-14 14.0 cfs 0.0 — Irrigation, Municipal +6 1
30667.09261 1875-05-101941-04-29 41.0 cfs 0.0 — Irrigation, Augmentation 273
57313.00000 2006-12-012006-12-31 0.8 cfs 0.0 — Recreation, Fishery 14CW3009, 06CW0253

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 55.8 cfs decreed rate, the average day over the last 5 year(s) had 55.344 cfs in priority (99% of the decree). No call in effect is a free river — that was 97.6% of days.

On 44 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 2 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 51.25 cfs 92% 252 0
2025 55.8 cfs 100% 365 0
2024 55.8 cfs 100% 366 0
2023 55.8 cfs 100% 365 0
2022 55.8 cfs 100% 365 0
Show the last 120 days, day by day
DateIn priorityControlling call
2026-10-23 55.8 cfs (100%) free river — no call
2026-10-22 55.8 cfs (100%) free river — no call
2026-10-21 55.8 cfs (100%) free river — no call
2026-10-20 55.8 cfs (100%) free river — no call
2026-10-19 55.8 cfs (100%) free river — no call
2026-10-18 55.8 cfs (100%) free river — no call
2026-10-17 55.8 cfs (100%) free river — no call
2026-10-16 55.8 cfs (100%) free river — no call
2026-10-15 55.8 cfs (100%) free river — no call
2026-10-14 55.8 cfs (100%) free river — no call
2026-10-13 55.8 cfs (100%) free river — no call
2026-10-12 55.8 cfs (100%) free river — no call
2026-10-11 55.8 cfs (100%) free river — no call
2026-10-10 55.8 cfs (100%) free river — no call
2026-10-09 55.8 cfs (100%) free river — no call
2026-10-08 55.8 cfs (100%) free river — no call
2026-10-07 55.8 cfs (100%) free river — no call
2026-10-06 55.8 cfs (100%) free river — no call
2026-10-05 55.8 cfs (100%) free river — no call
2026-10-04 55.8 cfs (100%) free river — no call
2026-10-03 55.8 cfs (100%) free river — no call
2026-10-02 55.8 cfs (100%) free river — no call
2026-10-01 55.8 cfs (100%) free river — no call
2026-09-30 55.8 cfs (100%) free river — no call
2026-09-29 55.8 cfs (100%) free river — no call
2026-09-28 55.8 cfs (100%) free river — no call
2026-09-27 55.8 cfs (100%) free river — no call
2026-09-26 55.8 cfs (100%) free river — no call
2026-09-25 55.8 cfs (100%) free river — no call
2026-09-24 55.8 cfs (100%) free river — no call
2026-09-23 55.8 cfs (100%) free river — no call
2026-09-22 55.8 cfs (100%) free river — no call
2026-09-21 55.8 cfs (100%) free river — no call
2026-09-20 55.8 cfs (100%) free river — no call
2026-09-19 55.8 cfs (100%) free river — no call
2026-09-18 55.8 cfs (100%) free river — no call
2026-09-17 55.8 cfs (100%) free river — no call
2026-09-16 55.8 cfs (100%) free river — no call
2026-09-15 55.8 cfs (100%) free river — no call
2026-09-14 55.8 cfs (100%) free river — no call
2026-09-13 55.8 cfs (100%) free river — no call
2026-09-12 55.8 cfs (100%) free river — no call
2026-09-11 55.8 cfs (100%) free river — no call
2026-09-10 55.8 cfs (100%) free river — no call
2026-09-09 55.8 cfs (100%) free river — no call
2026-09-08 55.8 cfs (100%) free river — no call
2026-09-07 55.8 cfs (100%) free river — no call
2026-09-06 55.8 cfs (100%) free river — no call
2026-09-05 55.8 cfs (100%) free river — no call
2026-09-04 55.8 cfs (100%) free river — no call
2026-09-03 55.8 cfs (100%) free river — no call
2026-09-02 55.8 cfs (100%) free river — no call
2026-09-01 55.8 cfs (100%) free river — no call
2026-08-31 55.8 cfs (100%) free river — no call
2026-08-30 55.8 cfs (100%) free river — no call
2026-08-29 55.8 cfs (100%) free river — no call
2026-08-28 55.8 cfs (100%) free river — no call
2026-08-27 55.8 cfs (100%) free river — no call
2026-08-26 55.8 cfs (100%) free river — no call
2026-08-25 55.8 cfs (100%) free river — no call
2026-08-24 55.8 cfs (100%) free river — no call
2026-08-23 55.8 cfs (100%) free river — no call
2026-08-22 55.8 cfs (100%) free river — no call
2026-08-21 55.8 cfs (100%) free river — no call
2026-08-20 55.8 cfs (100%) free river — no call
2026-08-19 55.8 cfs (100%) free river — no call
2026-08-18 55.8 cfs (100%) free river — no call
2026-08-17 55.8 cfs (100%) free river — no call
2026-08-16 55.8 cfs (100%) free river — no call
2026-08-15 55.8 cfs (100%) free river — no call
2026-08-14 55.8 cfs (100%) free river — no call
2026-08-13 55.8 cfs (100%) free river — no call
2026-08-12 55.8 cfs (100%) free river — no call
2026-08-11 55.8 cfs (100%) free river — no call
2026-08-10 55.8 cfs (100%) free river — no call
2026-08-09 55.8 cfs (100%) free river — no call
2026-08-08 55.8 cfs (100%) free river — no call
2026-08-07 55.8 cfs (100%) free river — no call
2026-08-06 55.8 cfs (100%) free river — no call
2026-08-05 55.8 cfs (100%) free river — no call
2026-08-04 55.8 cfs (100%) free river — no call
2026-08-03 55.8 cfs (100%) free river — no call
2026-08-02 55.8 cfs (100%) free river — no call
2026-08-01 55.8 cfs (100%) free river — no call
2026-07-31 55.8 cfs (100%) free river — no call
2026-07-30 55.8 cfs (100%) free river — no call
2026-07-29 55.8 cfs (100%) free river — no call
2026-07-28 55.8 cfs (100%) free river — no call
2026-07-27 55.8 cfs (100%) free river — no call
2026-07-26 55.8 cfs (100%) free river — no call
2026-07-25 55.8 cfs (100%) free river — no call
2026-07-24 55.8 cfs (100%) free river — no call
2026-07-23 55.8 cfs (100%) free river — no call
2026-07-22 55.8 cfs (100%) free river — no call
2026-07-21 55.8 cfs (100%) free river — no call
2026-07-20 55.8 cfs (100%) free river — no call
2026-07-19 55.8 cfs (100%) free river — no call
2026-07-18 55.8 cfs (100%) free river — no call
2026-07-17 55.8 cfs (100%) free river — no call
2026-07-16 55.8 cfs (100%) free river — no call
2026-07-15 55.8 cfs (100%) free river — no call
2026-07-14 55.8 cfs (100%) free river — no call
2026-07-13 55.8 cfs (100%) free river — no call
2026-07-12 55.8 cfs (100%) free river — no call
2026-07-11 55.8 cfs (100%) free river — no call
2026-07-10 55.8 cfs (100%) free river — no call
2026-07-09 55.8 cfs (100%) free river — no call
2026-07-08 55.8 cfs (100%) free river — no call
2026-07-07 55.8 cfs (100%) free river — no call
2026-07-06 55.8 cfs (100%) free river — no call
2026-07-05 55.8 cfs (100%) free river — no call
2026-07-04 55.8 cfs (100%) free river — no call
2026-07-03 55.8 cfs (100%) free river — no call
2026-07-02 55.8 cfs (100%) free river — no call
2026-07-01 55.8 cfs (100%) free river — no call
2026-06-30 55.8 cfs (100%) free river — no call
2026-06-29 55.8 cfs (100%) free river — no call
2026-06-28 55.8 cfs (100%) free river — no call
2026-06-27 55.8 cfs (100%) free river — no call
2026-06-26 55.8 cfs (100%) free river — no call
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: 11, of which 8 sit on a river it flows into.

Recorded use (last 15 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 4,315 AF. Its most recent year on record, 2025, came in at 4,035 AF — 94% of that, and 5th lowest of the 15 years with a recorded volume.

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 recordDays recordedPeak (cfs)
2011 4,317 9th lowest of 15 · 100% of median 176 24.6
2012 4,706 11th lowest of 15 · 109% of median 167 24.6
2013 3,792 3rd lowest of 15 · 88% of median 189 17.5
2014 4,993 14th lowest of 15 · 116% of median 159 22.2
2015 3,791 2nd lowest of 15 · 88% of median 151 23.7
2016 4,859 13th lowest of 15 · 113% of median 209 25.3
2017 4,221 7th lowest of 15 · 98% of median 175 26.1
2018 4,773 12th lowest of 15 · 111% of median 204 24.3
2019 4,398 10th lowest of 15 · 102% of median 176 25.8
2020 4,315 8th lowest of 15 · 100% of median 152 23.8
2021 7,086 15th lowest of 15 · 164% of median 232 44.9
2022 3,972 4th lowest of 15 · 92% of median 163 18.4
2023 3,755 1st lowest of 15 · 87% of median 177 20.6
2024 4,144 6th lowest of 15 · 96% of median 168 25.7
2025 4,035 5th lowest of 15 · 94% of median 201 23.3

Call-derived yield: senior right divertible 100.0% of a median season / 100.0% dry-year.

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 3 right(s), seniority decoded
diversion record present 9085 measured days; currency unknown (no data-coverage date to compare against)
record continuity continuous 84% of the irrigation seasons in 1975-2025 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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