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WOLFER DITCH

Structure dossier · WDID 4700961 · DITCH · ROARING FORK · DWR record

Wolfer Ditch is a ditch on Roaring Fork 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 05:41 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.

In short

WOLFER DITCH holds 5 decreed rights on ROARING FORK. No active call senior to its rights reaches its district today (6 active calls checked), so it is in priority now. 6 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 12,604 acre-feet. It was a party to 1 court cases that also touched 1 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 (6 active call(s) checked).

6 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 1888-05-08 — 146th most senior of the 1262 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: HILLSIDE DITCH (1888-05-01). Immediately behind: STAPLES DITCH 1 (1888-05-10).

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
14008.00000 1888-05-081892-09-19 6.0 cfs 0.0 — Irrigation 64(61)
18921.00000 1901-10-211908-07-01 140.0 cfs 0.0 — Storage, Irrigation +2 160
23016.22547 1911-09-251921-08-02 38.0 cfs 0.0 — Storage, Irrigation +2 201
44559.22090 1910-06-251972-12-31 30.0 cfs 0.0 — Irrigation W0411-72
50038.19904 1904-06-301987-12-31 4.5 cfs 0.0 — Irrigation, Stock 87CW0012

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 218.5 cfs decreed rate, the average day over the last 6 year(s) had 192.317 cfs in priority (88% of the decree). No call in effect is a free river — that was 86.5% of days.

On 214 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 13 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 100.16 cfs 46% 173 32
2025 75.59 cfs 35% 232 0
2024 218.5 cfs 100% 366 0
2023 218.5 cfs 100% 365 0
2022 218.5 cfs 100% 365 0
2021 218.5 cfs 100% 79 0
Show the last 120 days, day by day
DateIn priorityControlling call
2026-10-13 218.5 cfs (100%) free river — no call
2026-10-12 218.5 cfs (100%) free river — no call
2026-10-11 218.5 cfs (100%) free river — no call
2026-10-10 218.5 cfs (100%) free river — no call
2026-10-09 218.5 cfs (100%) free river — no call
2026-10-08 218.5 cfs (100%) free river — no call
2026-10-07 218.5 cfs (100%) free river — no call
2026-10-06 218.5 cfs (100%) free river — no call
2026-10-05 218.5 cfs (100%) free river — no call
2026-10-04 218.5 cfs (100%) free river — no call
2026-10-03 218.5 cfs (100%) free river — no call
2026-10-02 218.5 cfs (100%) free river — no call
2026-10-01 218.5 cfs (100%) free river — no call
2026-09-30 218.5 cfs (100%) free river — no call
2026-09-29 218.5 cfs (100%) free river — no call
2026-09-28 218.5 cfs (100%) free river — no call
2026-09-27 218.5 cfs (100%) free river — no call
2026-09-26 218.5 cfs (100%) free river — no call
2026-09-25 218.5 cfs (100%) free river — no call
2026-09-24 218.5 cfs (100%) free river — no call
2026-09-23 218.5 cfs (100%) free river — no call
2026-09-22 218.5 cfs (100%) free river — no call
2026-09-21 218.5 cfs (100%) free river — no call
2026-09-20 218.5 cfs (100%) free river — no call
2026-09-19 218.5 cfs (100%) free river — no call
2026-09-18 218.5 cfs (100%) free river — no call
2026-09-17 100.146 cfs (46%) HIHO DITCH, 1885-04-01 · part of the day (54%) · Michigan River · on a river this source flows into
2026-09-16 0.0 cfs (0%) HIHO DITCH, 1885-04-01 · Michigan River · on a river this source flows into
2026-09-15 2.0 cfs (1%) HIHO DITCH, 1885-04-01 · Michigan River · on a river this source flows into
2026-09-14 94.542 cfs (43%) WALDEN MICHIGAN R DIV, 1888-05-20 · part of the day (58%) · Michigan River · on a river this source flows into
2026-09-13 218.5 cfs (100%) free river — no call
2026-09-12 218.5 cfs (100%) free river — no call
2026-09-11 218.5 cfs (100%) free river — no call
2026-09-10 218.5 cfs (100%) free river — no call
2026-09-09 218.5 cfs (100%) free river — no call
2026-09-08 218.5 cfs (100%) free river — no call
2026-09-07 218.5 cfs (100%) free river — no call
2026-09-06 218.5 cfs (100%) free river — no call
2026-09-05 218.5 cfs (100%) free river — no call
2026-09-04 205.562 cfs (94%) LILY PARK DITCH NO 1 PUMP STATION NO 1, 1960-09-01 · part of the day (38%) · Yampa River · on a river this source flows into
2026-09-03 184.0 cfs (84%) LILY PARK DITCH NO 1 PUMP STATION NO 1, 1923-05-28 · Yampa River · on a river this source flows into
2026-09-02 76.667 cfs (35%) WALDEN MICHIGAN R DIV, 1885-04-01 · Michigan River · on a river this source flows into
2026-09-01 0.0 cfs (0%) WALDEN MICHIGAN R DIV, 1885-04-01 · Michigan River · on a river this source flows into
2026-08-31 0.0 cfs (0%) WALDEN MICHIGAN R DIV, 1885-04-01 · Michigan River · on a river this source flows into
2026-08-30 0.0 cfs (0%) WALDEN MICHIGAN R DIV, 1885-04-01 · Michigan River · on a river this source flows into
2026-08-29 0.0 cfs (0%) WALDEN MICHIGAN R DIV, 1885-04-01 · Michigan River · on a river this source flows into
2026-08-28 92.0 cfs (42%) WALDEN MICHIGAN R DIV, 1885-04-01 · Michigan River · on a river this source flows into
2026-08-27 184.0 cfs (84%) LILY PARK DITCH NO 1 PUMP STATION NO 1, 1923-05-28 · Yampa River · on a river this source flows into
2026-08-26 184.0 cfs (84%) LILY PARK DITCH NO 1 PUMP STATION NO 1, 1923-05-28 · Yampa River · on a river this source flows into
2026-08-25 184.0 cfs (84%) LILY PARK DITCH NO 1 PUMP STATION NO 1, 1923-05-28 · Yampa River · on a river this source flows into
2026-08-24 184.0 cfs (84%) LILY PARK DITCH NO 1 PUMP STATION NO 1, 1923-05-28 · Yampa River · on a river this source flows into
2026-08-23 184.0 cfs (84%) LILY PARK DITCH NO 1 PUMP STATION NO 1, 1923-05-28 · Yampa River · on a river this source flows into
2026-08-22 184.0 cfs (84%) LILY PARK DITCH NO 1 PUMP STATION NO 1, 1923-05-28 · Yampa River · on a river this source flows into
2026-08-21 184.0 cfs (84%) LILY PARK DITCH NO 1 PUMP STATION NO 1, 1923-05-28 · Yampa River · on a river this source flows into
2026-08-20 184.0 cfs (84%) LILY PARK DITCH NO 1 PUMP STATION NO 1, 1923-05-28 · Yampa River · on a river this source flows into
2026-08-19 201.25 cfs (92%) LILY PARK DITCH NO 1 PUMP STATION NO 1, 1923-05-28 · part of the day (50%) · Yampa River · on a river this source flows into
2026-08-18 218.5 cfs (100%) free river — no call
2026-08-17 218.5 cfs (100%) free river — no call
2026-08-16 218.5 cfs (100%) free river — no call
2026-08-15 218.5 cfs (100%) free river — no call
2026-08-14 218.5 cfs (100%) free river — no call
2026-08-13 218.5 cfs (100%) free river — no call
2026-08-12 218.5 cfs (100%) free river — no call
2026-08-11 218.5 cfs (100%) free river — no call
2026-08-10 218.5 cfs (100%) free river — no call
2026-08-09 218.5 cfs (100%) free river — no call
2026-08-08 218.5 cfs (100%) free river — no call
2026-08-07 218.5 cfs (100%) free river — no call
2026-08-06 218.5 cfs (100%) free river — no call
2026-08-05 218.5 cfs (100%) free river — no call
2026-08-04 218.5 cfs (100%) free river — no call
2026-08-03 218.5 cfs (100%) free river — no call
2026-08-02 218.5 cfs (100%) free river — no call
2026-08-01 218.5 cfs (100%) free river — no call
2026-07-31 218.5 cfs (100%) free river — no call
2026-07-30 218.5 cfs (100%) free river — no call
2026-07-29 218.5 cfs (100%) free river — no call
2026-07-28 218.5 cfs (100%) free river — no call
2026-07-27 218.5 cfs (100%) free river — no call
2026-07-26 218.5 cfs (100%) free river — no call
2026-07-25 218.5 cfs (100%) free river — no call
2026-07-24 218.5 cfs (100%) free river — no call
2026-07-23 218.5 cfs (100%) free river — no call
2026-07-22 218.5 cfs (100%) free river — no call
2026-07-21 218.5 cfs (100%) free river — no call
2026-07-20 218.5 cfs (100%) free river — no call
2026-07-19 218.5 cfs (100%) free river — no call
2026-07-18 218.5 cfs (100%) free river — no call
2026-07-17 218.5 cfs (100%) free river — no call
2026-07-16 218.5 cfs (100%) free river — no call
2026-07-15 218.5 cfs (100%) free river — no call
2026-07-14 218.5 cfs (100%) free river — no call
2026-07-13 218.5 cfs (100%) free river — no call
2026-07-12 218.5 cfs (100%) free river — no call
2026-07-11 218.5 cfs (100%) free river — no call
2026-07-10 218.5 cfs (100%) free river — no call
2026-07-09 218.5 cfs (100%) free river — no call
2026-07-08 218.5 cfs (100%) free river — no call
2026-07-07 156.521 cfs (72%) KIWA DITCH, 1888-09-25 · part of the day (29%) · Michigan River · on a river this source flows into
2026-07-06 6.0 cfs (3%) KIWA DITCH, 1888-09-25 · Michigan River · on a river this source flows into
2026-07-05 6.0 cfs (3%) KIWA DITCH, 1888-09-25 · Michigan River · on a river this source flows into
2026-07-04 6.0 cfs (3%) KIWA DITCH, 1888-09-25 · Michigan River · on a river this source flows into
2026-07-03 6.0 cfs (3%) KIWA DITCH, 1888-09-20 · Michigan River · on a river this source flows into
2026-07-02 6.0 cfs (3%) KIWA DITCH, 1888-09-20 · Michigan River · on a river this source flows into
2026-07-01 6.0 cfs (3%) KIWA DITCH, 1888-09-20 · Michigan River · on a river this source flows into
2026-06-30 6.0 cfs (3%) KIWA DITCH, 1888-06-21 · Michigan River · on a river this source flows into
2026-06-29 6.0 cfs (3%) KIWA DITCH, 1888-06-21 · Michigan River · on a river this source flows into
2026-06-28 6.0 cfs (3%) KIWA DITCH, 1888-06-21 · Michigan River · on a river this source flows into
2026-06-27 6.0 cfs (3%) KIWA DITCH, 1888-09-20 · Michigan River · on a river this source flows into
2026-06-26 6.0 cfs (3%) KIWA DITCH, 1888-06-21 · Michigan River · on a river this source flows into
2026-06-25 6.0 cfs (3%) KIWA DITCH, 1888-06-21 · Michigan River · on a river this source flows into
2026-06-24 6.0 cfs (3%) KIWA DITCH, 1888-06-21 · Michigan River · on a river this source flows into
2026-06-23 6.0 cfs (3%) KIWA DITCH, 1888-06-21 · Michigan River · on a river this source flows into
2026-06-22 6.0 cfs (3%) KIWA DITCH, 1888-06-21 · Michigan River · on a river this source flows into
2026-06-21 6.0 cfs (3%) KIWA DITCH, 1888-06-21 · Michigan River · on a river this source flows into
2026-06-20 6.0 cfs (3%) KIWA DITCH, 1888-06-21 · Michigan River · on a river this source flows into
2026-06-19 6.0 cfs (3%) KIWA DITCH, 1888-06-21 · Michigan River · on a river this source flows into
2026-06-18 6.0 cfs (3%) KIWA DITCH, 1888-06-21 · Michigan River · on a river this source flows into
2026-06-17 6.0 cfs (3%) KIWA DITCH, 1888-06-21 · Michigan River · on a river this source flows into
2026-06-16 6.0 cfs (3%) KIWA DITCH, 1888-06-21 · Michigan 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: 147, of which 143 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 12,604 AF. Its most recent year on record, 2025, came in at 7,785 AF — 62% of that, and 4th 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)
2008 12,604 8th lowest of 15 · 100% of median 125 184.0
2009 13,091 9th lowest of 15 · 104% of median 126 180.0
2010 8,039 6th lowest of 15 · 64% of median 85 188.0
2012 7,984 5th lowest of 15 · 63% of median 84 110.0
2013 14,814 10th lowest of 15 · 118% of median 192 208.0
2014 15,643 11th lowest of 15 · 124% of median 128 180.5
2015 8,945 7th lowest of 15 · 71% of median 117 139.0
2016 16,970 13th lowest of 15 · 135% of median 164 240.6
2017 27,424 15th lowest of 15 · 218% of median 174 178.3
2018 15,803 12th lowest of 15 · 125% of median 111 140.0
2019 25,583 14th lowest of 15 · 203% of median 138 258.3
2022 0 1st lowest of 15 · 0% of median 1 0.0
2023 2,899 3rd lowest of 15 · 23% of median 55 38.8
2024 720 2nd lowest of 15 · 6% of median 13 30.2
2025 7,785 4th lowest of 15 · 62% of median 72 129.1

Call-derived yield: senior right divertible 17.3% of a median season / 5.0% dry-year.

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 5 right(s), seniority decoded
diversion record present 7245 measured days; currency unknown (no data-coverage date to compare against)
record continuity patchy 47% of the irrigation seasons in 1953-2025 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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