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THEO NETHERLY DITCH NO2

Structure dossier · WDID 6001694 · DITCH · HORSEFLY CREEK · DWR record

Theo Netherly Ditch No2 is a ditch on Horsefly 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 2026-10-27 18:17 by Hydrohistorian. Sources: DWR HydroBase snapshot HydroBase_CO_20260928 (history) + CDSS REST (current), USGS NWIS cross-checks. Engine v0.5.0 (3876149) — every figure regenerates from this named code version and data image.

The record and the river

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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.

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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).

12 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: no call in the record verifiably applies to this district (statements and caller locations checked). 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 1889-09-16 — 90th most senior of the 2893 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: THEO NETHERLY DITCH NO1 (1889-09-16). Immediately behind: LANDSBURY DITCH (1889-10-03).

On HORSEFLY CREEK at river mile 15.1, it is 79th of 438 down the reach. Immediately upstream: ABBOTT DITCH 1. Immediately downstream: HOFMANN RESERVOIR NO 21.

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 (1)

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
14504.00000 1889-09-161911-06-03 4.0 cfs 0.0 — Irrigation 30

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 4.0 cfs decreed rate, the average day over the last 5 year(s) had 4.0 cfs in priority (100% of the decree). No call in effect is a free river — that was 83.5% of days.

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 18 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 4.0 cfs 100% 215 0
2025 4.0 cfs 100% 271 0
2024 4.0 cfs 100% 315 0
2023 4.0 cfs 100% 337 0
2022 4.0 cfs 100% 322 0
Show the last 120 days, day by day
DateIn priorityControlling call
2026-10-27 4.0 cfs (100%) free river — no call
2026-10-26 4.0 cfs (100%) free river — no call
2026-10-25 4.0 cfs (100%) free river — no call
2026-10-24 4.0 cfs (100%) free river — no call
2026-10-23 4.0 cfs (100%) free river — no call
2026-10-22 4.0 cfs (100%) free river — no call
2026-10-21 4.0 cfs (100%) free river — no call
2026-10-20 4.0 cfs (100%) free river — no call
2026-10-19 4.0 cfs (100%) free river — no call
2026-10-18 4.0 cfs (100%) free river — no call
2026-10-17 4.0 cfs (100%) free river — no call
2026-10-16 4.0 cfs (100%) free river — no call
2026-10-15 4.0 cfs (100%) free river — no call
2026-10-14 4.0 cfs (100%) free river — no call
2026-10-13 4.0 cfs (100%) free river — no call
2026-10-12 4.0 cfs (100%) free river — no call
2026-10-11 4.0 cfs (100%) free river — no call
2026-10-10 4.0 cfs (100%) free river — no call
2026-10-09 4.0 cfs (100%) free river — no call
2026-10-08 4.0 cfs (100%) free river — no call
2026-10-07 4.0 cfs (100%) free river — no call
2026-10-06 4.0 cfs (100%) free river — no call
2026-10-05 4.0 cfs (100%) free river — no call
2026-10-04 4.0 cfs (100%) free river — no call
2026-10-03 4.0 cfs (100%) free river — no call
2026-10-02 4.0 cfs (100%) free river — no call
2026-10-01 4.0 cfs (100%) free river — no call
2026-09-30 4.0 cfs (100%) free river — no call
2026-09-29 4.0 cfs (100%) free river — no call
2026-09-28 4.0 cfs (100%) free river — no call
2026-09-27 4.0 cfs (100%) free river — no call
2026-09-26 4.0 cfs (100%) free river — no call
2026-09-25 4.0 cfs (100%) free river — no call
2026-09-24 4.0 cfs (100%) free river — no call
2026-09-23 4.0 cfs (100%) free river — no call
2026-09-22 4.0 cfs (100%) free river — no call
2026-09-21 4.0 cfs (100%) free river — no call
2026-09-20 4.0 cfs (100%) free river — no call
2026-09-19 4.0 cfs (100%) free river — no call
2026-09-18 4.0 cfs (100%) free river — no call
2026-09-17 4.0 cfs (100%) free river — no call
2026-09-16 4.0 cfs (100%) HIGHLINE CANAL, 1914-11-02 · part of the day (33%) · San Miguel River · on a river this source flows into
2026-09-15 4.0 cfs (100%) HIGHLINE CANAL, 1914-11-02 · San Miguel River · on a river this source flows into
2026-09-14 4.0 cfs (100%) HIGHLINE CANAL, 1914-11-02 · San Miguel River · on a river this source flows into
2026-09-13 4.0 cfs (100%) HIGHLINE CANAL, 1914-11-02 · San Miguel River · on a river this source flows into
2026-09-12 4.0 cfs (100%) HIGHLINE CANAL, 1914-11-02 · San Miguel River · on a river this source flows into
2026-09-11 4.0 cfs (100%) HIGHLINE CANAL, 1914-11-02 · San Miguel River · on a river this source flows into
2026-09-10 4.0 cfs (100%) HIGHLINE CANAL, 1914-11-02 · San Miguel River · on a river this source flows into
2026-09-09 4.0 cfs (100%) HIGHLINE CANAL, 1914-11-02 · San Miguel River · on a river this source flows into
2026-09-08 4.0 cfs (100%) HIGHLINE CANAL, 1914-11-02 · San Miguel River · on a river this source flows into
2026-09-07 4.0 cfs (100%) HIGHLINE CANAL, 1914-11-02 · San Miguel River · on a river this source flows into
2026-09-06 4.0 cfs (100%) HIGHLINE CANAL, 1914-11-02 · San Miguel River · on a river this source flows into
2026-09-05 4.0 cfs (100%) HIGHLINE CANAL, 1914-11-02 · San Miguel River · on a river this source flows into
2026-09-04 4.0 cfs (100%) HIGHLINE CANAL, 1914-11-02 · San Miguel River · on a river this source flows into
2026-09-03 4.0 cfs (100%) HIGHLINE CANAL, 1914-11-02 · San Miguel River · on a river this source flows into
2026-09-02 4.0 cfs (100%) HIGHLINE CANAL, 1914-11-02 · San Miguel River · on a river this source flows into
2026-09-01 4.0 cfs (100%) HIGHLINE CANAL, 1914-11-02 · San Miguel River · on a river this source flows into
2026-08-31 4.0 cfs (100%) HIGHLINE CANAL, 1914-11-02 · San Miguel River · on a river this source flows into
2026-08-30 4.0 cfs (100%) HIGHLINE CANAL, 1914-11-02 · San Miguel River · on a river this source flows into
2026-08-29 4.0 cfs (100%) HIGHLINE CANAL, 1914-11-02 · San Miguel River · on a river this source flows into
2026-08-28 4.0 cfs (100%) HIGHLINE CANAL, 1914-11-02 · San Miguel River · on a river this source flows into
2026-08-27 4.0 cfs (100%) HIGHLINE CANAL, 1914-11-02 · San Miguel River · on a river this source flows into
2026-08-26 4.0 cfs (100%) HIGHLINE CANAL, 1914-11-02 · San Miguel River · on a river this source flows into
2026-08-25 4.0 cfs (100%) HIGHLINE CANAL, 1914-11-02 · San Miguel River · on a river this source flows into
2026-08-24 4.0 cfs (100%) HIGHLINE CANAL, 1914-11-02 · San Miguel River · on a river this source flows into
2026-08-23 4.0 cfs (100%) HIGHLINE CANAL, 1914-11-02 · San Miguel River · on a river this source flows into
2026-08-22 4.0 cfs (100%) HIGHLINE CANAL, 1914-11-02 · San Miguel River · on a river this source flows into
2026-08-21 4.0 cfs (100%) HIGHLINE CANAL, 1914-11-02 · San Miguel River · on a river this source flows into
2026-08-20 4.0 cfs (100%) HIGHLINE CANAL, 1914-11-02 · San Miguel River · on a river this source flows into
2026-08-19 4.0 cfs (100%) HIGHLINE CANAL, 1914-11-02 · San Miguel River · on a river this source flows into
2026-08-18 4.0 cfs (100%) HIGHLINE CANAL, 1926-10-20 · San Miguel River · on a river this source flows into
2026-08-17 4.0 cfs (100%) HIGHLINE CANAL, 1926-10-20 · San Miguel River · on a river this source flows into
2026-08-16 4.0 cfs (100%) HIGHLINE CANAL, 1926-10-20 · San Miguel River · on a river this source flows into
2026-08-15 4.0 cfs (100%) HIGHLINE CANAL, 1926-10-20 · San Miguel River · on a river this source flows into
2026-08-14 4.0 cfs (100%) HIGHLINE CANAL, 1926-10-20 · San Miguel River · on a river this source flows into
2026-08-13 4.0 cfs (100%) HIGHLINE CANAL, 1926-10-20 · San Miguel River · on a river this source flows into
2026-08-12 4.0 cfs (100%) HIGHLINE CANAL, 1926-10-20 · San Miguel River · on a river this source flows into
2026-08-11 4.0 cfs (100%) HIGHLINE CANAL, 1926-10-20 · San Miguel River · on a river this source flows into
2026-08-10 4.0 cfs (100%) HIGHLINE CANAL, 1926-10-20 · San Miguel River · on a river this source flows into
2026-08-09 4.0 cfs (100%) HIGHLINE CANAL, 1926-10-20 · San Miguel River · on a river this source flows into
2026-08-08 4.0 cfs (100%) HIGHLINE CANAL, 1926-10-20 · San Miguel River · on a river this source flows into
2026-08-07 4.0 cfs (100%) HIGHLINE CANAL, 1926-10-20 · part of the day (67%) · San Miguel River · on a river this source flows into
2026-08-06 4.0 cfs (100%) free river — no call
2026-08-05 4.0 cfs (100%) free river — no call
2026-08-04 4.0 cfs (100%) free river — no call
2026-08-03 4.0 cfs (100%) free river — no call
2026-08-02 4.0 cfs (100%) free river — no call
2026-08-01 4.0 cfs (100%) free river — no call
2026-07-31 4.0 cfs (100%) free river — no call
2026-07-30 4.0 cfs (100%) free river — no call
2026-07-29 4.0 cfs (100%) free river — no call
2026-07-28 4.0 cfs (100%) free river — no call
2026-07-27 4.0 cfs (100%) free river — no call
2026-07-26 4.0 cfs (100%) free river — no call
2026-07-25 4.0 cfs (100%) free river — no call
2026-07-24 4.0 cfs (100%) free river — no call
2026-07-23 4.0 cfs (100%) free river — no call
2026-07-22 4.0 cfs (100%) B C D DITCH, 1926-10-20 · part of the day (33%) · San Miguel River · on a river this source flows into
2026-07-21 4.0 cfs (100%) B C D DITCH, 1926-10-20 · San Miguel River · on a river this source flows into
2026-07-20 4.0 cfs (100%) B C D DITCH, 1926-10-20 · San Miguel River · on a river this source flows into
2026-07-19 4.0 cfs (100%) B C D DITCH, 1926-10-20 · San Miguel River · on a river this source flows into
2026-07-18 4.0 cfs (100%) B C D DITCH, 1926-10-20 · San Miguel River · on a river this source flows into
2026-07-17 4.0 cfs (100%) B C D DITCH, 1926-10-20 · San Miguel River · on a river this source flows into
2026-07-16 4.0 cfs (100%) B C D DITCH, 1926-10-20 · San Miguel River · on a river this source flows into
2026-07-15 4.0 cfs (100%) B C D DITCH, 1926-10-20 · San Miguel River · on a river this source flows into
2026-07-14 4.0 cfs (100%) B C D DITCH, 1926-10-20 · San Miguel River · on a river this source flows into
2026-07-13 4.0 cfs (100%) B C D DITCH, 1926-10-20 · San Miguel River · on a river this source flows into
2026-07-12 4.0 cfs (100%) B C D DITCH, 1926-10-20 · San Miguel River · on a river this source flows into
2026-07-11 4.0 cfs (100%) B C D DITCH, 1926-10-20 · San Miguel River · on a river this source flows into
2026-07-10 4.0 cfs (100%) B C D DITCH, 1926-10-20 · San Miguel River · on a river this source flows into
2026-07-09 4.0 cfs (100%) B C D DITCH, 1926-10-20 · San Miguel River · on a river this source flows into
2026-07-08 4.0 cfs (100%) B C D DITCH, 1926-10-20 · San Miguel River · on a river this source flows into
2026-07-07 4.0 cfs (100%) B C D DITCH, 1926-10-20 · part of the day (67%) · San Miguel River · on a river this source flows into
2026-07-06 4.0 cfs (100%) free river — no call
2026-07-05 4.0 cfs (100%) free river — no call
2026-07-04 4.0 cfs (100%) free river — no call
2026-07-03 4.0 cfs (100%) free river — no call
2026-07-02 4.0 cfs (100%) free river — no call
2026-07-01 4.0 cfs (100%) free river — no call
2026-06-30 4.0 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: 60, of which 32 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 171 AF. Its most recent year on record, 2025, came in at 55 AF — 32% of that, and 2nd 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 244 12th lowest of 15 · 143% of median 153 1.7
2012 98 4th lowest of 15 · 57% of median 87 0.7
2013 298 13th lowest of 15 · 174% of median 186 2.3
2014 184 9th lowest of 15 · 108% of median 99 1.7
2015 171 8th lowest of 15 · 100% of median 71 2.1
2016 194 10th lowest of 15 · 114% of median 106 1.6
2017 510 14th lowest of 15 · 298% of median 180 2.2
2018 53 1st lowest of 15 · 31% of median 41 0.8
2019 803 15th lowest of 15 · 470% of median 192 3.6
2020 131 7th lowest of 15 · 77% of median 62 3.0
2021 93 3rd lowest of 15 · 54% of median 60 1.6
2022 111 6th lowest of 15 · 65% of median 80 1.2
2023 210 11th lowest of 15 · 123% of median 83 3.3
2024 108 5th lowest of 15 · 63% of median 66 2.2
2025 55 2nd lowest of 15 · 32% of median 77 1.6

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 1 right(s), seniority decoded
diversion record current 2248 measured days, newest 331 day(s) before the data's end (DWR publishes ~1 year in arrears)
record continuity sparse 38% of the irrigation seasons in 1998-2025 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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