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TREMONT DITCH

Structure dossier · WDID 0100519 · DITCH · SOUTH PLATTE RIVER · DWR record

Tremont Ditch is a ditch on South Platte 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 2026-10-14 11:23 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.

Where this structure is measured

GageFlowing nowRecordHow we know
TREMONT DITCH TRMDITCO 0.0 cfs 2007–2026, 6,858 days DWR telemetry mapping

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 2026-10-14 08:00 (3.4 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 TRMDITCO ↗ (TREMONT DITCH). 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

TREMONT DITCH holds 7 decreed rights on SOUTH PLATTE RIVER. A call at SOUTH PLATTE RIVER COMPACT on SOUTH PLATTE RIVER (1897-06-13), and 1 other currently reaches it: junior rights called out. 2 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: no administrative call record for this basin. In a median year over its last 15 recorded years it diverts 13,729 acre-feet. It was a party to 3 court cases that also touched 6 other structures.

Assembled from the figures on this page — every number above is checked against them before it is shown (8 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

● Junior rights called out — call at SOUTH PLATTE RIVER COMPACT (SOUTH PLATTE RIVER, priority 1897-06-13).

● Junior rights called out — call at STERLING IRR CO DITCH 1 (SOUTH PLATTE RIVER, priority 1901-02-16).

Which of its rights are out of priority?

The outlook for the weeks ahead is not computable for this structure: no administrative call record for this basin. 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 1887-06-18 — 76th most senior of the 7708 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: AUX DITCH 2 (1887-02-12). Immediately behind: BEERY WELL 1-14606 (1887-06-18).

On MAINSTEM at river mile 152.7, it is 341st of 384 down the reach. Immediately upstream: SNYDER DITCH. Immediately downstream: A A SMITH DITCH.

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 (8)

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
13683.00000 1887-06-181895-11-21 20.0 cfs 0.0 — Irrigation CA17282
18687.00000 1901-03-011914-01-15 150.0 cfs 0.0 — Irrigation CA2142
19009.00000 1902-01-171914-01-15 175.0 cfs 0.0 — Irrigation CA17282
19071.00000 1902-03-201914-01-15 175.0 cfs 0.0 — Storage CA2142
47847.46567 1977-06-301981-12-31 102.0 cfs 73.0 cfs — Storage, Augmentation +1 03CW0096, 10CW0041 +1
51488.00000 1990-12-201990-12-31 0.0 cfs 0.0 8.0 cfs Irrigation 90CW0183
55491.00000 2001-12-052001-12-31 0.0 AF 6250.0 AF — Recharge 01CW0283
55491.00000 2001-12-052001-12-31 0.0 cfs 175.0 cfs — Recharge 01CW0283

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 622.0 cfs decreed rate, the average day over the last 6 year(s) had 622.0 cfs in priority (100% of the decree). No call in effect is a free river — that was 100.0% 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.

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 622.0 cfs 100% 286 0
2025 622.0 cfs 100% 365 0
2024 622.0 cfs 100% 366 0
2023 622.0 cfs 100% 365 0
2022 622.0 cfs 100% 365 0
2021 622.0 cfs 100% 79 0
Show the last 120 days, day by day
DateIn priorityControlling call
2026-10-13 622.0 cfs (100%) free river — no call
2026-10-12 622.0 cfs (100%) free river — no call
2026-10-11 622.0 cfs (100%) free river — no call
2026-10-10 622.0 cfs (100%) free river — no call
2026-10-09 622.0 cfs (100%) free river — no call
2026-10-08 622.0 cfs (100%) free river — no call
2026-10-07 622.0 cfs (100%) free river — no call
2026-10-06 622.0 cfs (100%) free river — no call
2026-10-05 622.0 cfs (100%) free river — no call
2026-10-04 622.0 cfs (100%) free river — no call
2026-10-03 622.0 cfs (100%) free river — no call
2026-10-02 622.0 cfs (100%) free river — no call
2026-10-01 622.0 cfs (100%) free river — no call
2026-09-30 622.0 cfs (100%) free river — no call
2026-09-29 622.0 cfs (100%) free river — no call
2026-09-28 622.0 cfs (100%) free river — no call
2026-09-27 622.0 cfs (100%) free river — no call
2026-09-26 622.0 cfs (100%) free river — no call
2026-09-25 622.0 cfs (100%) free river — no call
2026-09-24 622.0 cfs (100%) free river — no call
2026-09-23 622.0 cfs (100%) free river — no call
2026-09-22 622.0 cfs (100%) free river — no call
2026-09-21 622.0 cfs (100%) free river — no call
2026-09-20 622.0 cfs (100%) free river — no call
2026-09-19 622.0 cfs (100%) free river — no call
2026-09-18 622.0 cfs (100%) free river — no call
2026-09-17 622.0 cfs (100%) free river — no call
2026-09-16 622.0 cfs (100%) free river — no call
2026-09-15 622.0 cfs (100%) free river — no call
2026-09-14 622.0 cfs (100%) free river — no call
2026-09-13 622.0 cfs (100%) free river — no call
2026-09-12 622.0 cfs (100%) free river — no call
2026-09-11 622.0 cfs (100%) free river — no call
2026-09-10 622.0 cfs (100%) free river — no call
2026-09-09 622.0 cfs (100%) free river — no call
2026-09-08 622.0 cfs (100%) free river — no call
2026-09-07 622.0 cfs (100%) free river — no call
2026-09-06 622.0 cfs (100%) free river — no call
2026-09-05 622.0 cfs (100%) free river — no call
2026-09-04 622.0 cfs (100%) free river — no call
2026-09-03 622.0 cfs (100%) free river — no call
2026-09-02 622.0 cfs (100%) free river — no call
2026-09-01 622.0 cfs (100%) free river — no call
2026-08-31 622.0 cfs (100%) free river — no call
2026-08-30 622.0 cfs (100%) free river — no call
2026-08-29 622.0 cfs (100%) free river — no call
2026-08-28 622.0 cfs (100%) free river — no call
2026-08-27 622.0 cfs (100%) free river — no call
2026-08-26 622.0 cfs (100%) free river — no call
2026-08-25 622.0 cfs (100%) free river — no call
2026-08-24 622.0 cfs (100%) free river — no call
2026-08-23 622.0 cfs (100%) free river — no call
2026-08-22 622.0 cfs (100%) free river — no call
2026-08-21 622.0 cfs (100%) free river — no call
2026-08-20 622.0 cfs (100%) free river — no call
2026-08-19 622.0 cfs (100%) free river — no call
2026-08-18 622.0 cfs (100%) free river — no call
2026-08-17 622.0 cfs (100%) free river — no call
2026-08-16 622.0 cfs (100%) free river — no call
2026-08-15 622.0 cfs (100%) free river — no call
2026-08-14 622.0 cfs (100%) free river — no call
2026-08-13 622.0 cfs (100%) free river — no call
2026-08-12 622.0 cfs (100%) free river — no call
2026-08-11 622.0 cfs (100%) free river — no call
2026-08-10 622.0 cfs (100%) free river — no call
2026-08-09 622.0 cfs (100%) free river — no call
2026-08-08 622.0 cfs (100%) free river — no call
2026-08-07 622.0 cfs (100%) free river — no call
2026-08-06 622.0 cfs (100%) free river — no call
2026-08-05 622.0 cfs (100%) free river — no call
2026-08-04 622.0 cfs (100%) free river — no call
2026-08-03 622.0 cfs (100%) free river — no call
2026-08-02 622.0 cfs (100%) free river — no call
2026-08-01 622.0 cfs (100%) free river — no call
2026-07-31 622.0 cfs (100%) free river — no call
2026-07-30 622.0 cfs (100%) free river — no call
2026-07-29 622.0 cfs (100%) free river — no call
2026-07-28 622.0 cfs (100%) free river — no call
2026-07-27 622.0 cfs (100%) free river — no call
2026-07-26 622.0 cfs (100%) free river — no call
2026-07-25 622.0 cfs (100%) free river — no call
2026-07-24 622.0 cfs (100%) free river — no call
2026-07-23 622.0 cfs (100%) free river — no call
2026-07-22 622.0 cfs (100%) free river — no call
2026-07-21 622.0 cfs (100%) free river — no call
2026-07-20 622.0 cfs (100%) free river — no call
2026-07-19 622.0 cfs (100%) free river — no call
2026-07-18 622.0 cfs (100%) free river — no call
2026-07-17 622.0 cfs (100%) free river — no call
2026-07-16 622.0 cfs (100%) free river — no call
2026-07-15 622.0 cfs (100%) free river — no call
2026-07-14 622.0 cfs (100%) free river — no call
2026-07-13 622.0 cfs (100%) free river — no call
2026-07-12 622.0 cfs (100%) free river — no call
2026-07-11 622.0 cfs (100%) free river — no call
2026-07-10 622.0 cfs (100%) free river — no call
2026-07-09 622.0 cfs (100%) free river — no call
2026-07-08 622.0 cfs (100%) free river — no call
2026-07-07 622.0 cfs (100%) free river — no call
2026-07-06 622.0 cfs (100%) free river — no call
2026-07-05 622.0 cfs (100%) free river — no call
2026-07-04 622.0 cfs (100%) free river — no call
2026-07-03 622.0 cfs (100%) free river — no call
2026-07-02 622.0 cfs (100%) free river — no call
2026-07-01 622.0 cfs (100%) free river — no call
2026-06-30 622.0 cfs (100%) free river — no call
2026-06-29 622.0 cfs (100%) free river — no call
2026-06-28 622.0 cfs (100%) free river — no call
2026-06-27 622.0 cfs (100%) free river — no call
2026-06-26 622.0 cfs (100%) free river — no call
2026-06-25 622.0 cfs (100%) free river — no call
2026-06-24 622.0 cfs (100%) free river — no call
2026-06-23 622.0 cfs (100%) free river — no call
2026-06-22 622.0 cfs (100%) free river — no call
2026-06-21 622.0 cfs (100%) free river — no call
2026-06-20 622.0 cfs (100%) free river — no call
2026-06-19 622.0 cfs (100%) free river — no call
2026-06-18 622.0 cfs (100%) free river — no call
2026-06-17 622.0 cfs (100%) free river — no call
2026-06-16 622.0 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: 0.

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 13,729 AF. Its most recent year on record, 2025, came in at 7,705 AF — 56% of that, and 3rd 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 18,614 15th lowest of 15 · 136% of median 244 80.2
2012 4,865 2nd lowest of 15 · 35% of median 89 75.1
2013 9,399 4th lowest of 15 · 68% of median 124 80.4
2014 14,617 9th lowest of 15 · 106% of median 219 61.8
2015 15,929 12th lowest of 15 · 116% of median 238 77.5
2016 18,081 14th lowest of 15 · 132% of median 239 62.7
2017 16,891 13th lowest of 15 · 123% of median 192 76.7
2018 14,780 10th lowest of 15 · 108% of median 216 80.0
2019 14,929 11th lowest of 15 · 109% of median 211 64.9
2020 11,252 5th lowest of 15 · 82% of median 161 60.5
2021 13,513 7th lowest of 15 · 98% of median 156 86.4
2022 2,312 1st lowest of 15 · 17% of median 46 56.6
2023 12,897 6th lowest of 15 · 94% of median 220 78.2
2024 13,729 8th lowest of 15 · 100% of median 197 53.8
2025 7,705 3rd lowest of 15 · 56% of median 144 99.6

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 8 right(s), seniority decoded
diversion record current 11558 measured days, newest 331 day(s) before the data's end (DWR publishes ~1 year in arrears)
record continuity patchy 71% of the irrigation seasons in 1950-2025 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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