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TABLE MOUNTAIN DITCH

Structure dossier · WDID 0500569 · DITCH · LEFT HAND CREEK · DWR record

Table Mountain Ditch is a ditch on Left Hand 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 2026-10-14 17:52 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
TABLE MOUNTAIN DITCH LHTMDICO — — co-located, 9 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.

In short

TABLE MOUNTAIN DITCH holds 40 decreed rights on LEFT HAND CREEK. As of 2026-09-27, 38 of them are out of priority under a call at admin 4488.00000 placed by CLOUGH/TRUE DITCH. Its 2 most senior rights, back to 1860-09-01, 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 15 recorded years it diverts 1,719 acre-feet. It was a party to 2 court cases that also touched 7 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 (diversion). Faint dots are the neighbouring water; click any to open it.

Current administration

● Junior rights called out — call at LAKE DITCH (LEFT HAND CREEK, priority 1874-04-14).

● Junior rights called out — call at SOUTH FLAT DITCH (SAINT VRAIN CREEK, priority 1864-01-01).

● Junior rights called out — call at CLOUGH/TRUE DITCH (SAINT VRAIN CREEK, priority 1862-04-14).

Which of its rights are out of priority?

Under today's controlling call (CLOUGH/TRUE DITCH, priority 1862-04-14): 38 of this structure's 40 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, 2015, 2021, 2020, 2018), 3 of the rights shown below were out at least one week in at least one analog year.

Right (priority)NowAnalog years outMajority out by
1860-09-01 3897 ● in priority 0 of 5 —
1861-05-15 4153 ● in priority 0 of 5 —
1862-05-31 4534 ● out 0 of 5 —
1863-05-01 4869 ● out 0 of 5 —
… 33 more rights between these …
1950-10-01 36798 ● out 5 of 5 2026-09-27
1989-07-28 50978 ● out 5 of 5 2026-09-27
1989-12-12 51115 ● 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 LEFT HAND CREEK NEAR BOULDER, CO. around 2026-09-27 (the newest reading on file) — currently 67% of that gage's own median for this window — to pick the 5 most similar past years with complete administration records (2015–2026). 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 1860-09-01 — 9th most senior of the 1290 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: HALDI DITCH (1860-09-01). Immediately behind: WILLIAMSON DITCH (1860-09-01).

On LEFT HAND CREEK at river mile -0.9, it is 29th of 81 down the reach. Immediately upstream: BLUMENHEIN SEC 19 RES 2. Immediately downstream: BADER DITCH 1 & 2.

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 (40)

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
3897.00000 1860-09-011882-12-02 0.0 cfs 0.0 0.0093 cfs Storage, Irrigation +3 87CW0127, 98CW0313
4153.00000 1861-05-151882-12-02 0.0 cfs 0.0 0.3855 cfs Storage, Irrigation +3 98CW0313, 87CW0127
4534.00000 1862-05-311882-12-02 0.0 cfs 0.0 0.2662 cfs Storage, Irrigation +3 87CW0127, 98CW0313
4869.00000 1863-05-011882-12-02 0.0 cfs 0.0 0.1986 cfs Storage, Irrigation +3 98CW0313, 87CW0127
4899.00000 1863-05-311882-12-02 0.0 cfs 0.0 0.1451 cfs Storage, Irrigation +3 87CW0127, 98CW0313
4900.00000 1863-06-011882-12-02 0.0 cfs 0.0 4.6609 cfs Storage, Irrigation +3 98CW0313, 87CW0127
5017.00000 1863-09-261882-12-02 0.0 cfs 0.0 0.6887 cfs Storage, Irrigation +3 87CW0127, 98CW0313
5265.00000 1864-05-311882-12-02 0.0 cfs 0.0 0.9102 cfs Storage, Irrigation +3 98CW0313, 87CW0127
5310.00000 1864-07-151882-12-02 0.0 cfs 0.0 0.1688 cfs Storage, Irrigation +3 87CW0127, 98CW0313
5600.00000 1865-05-011882-12-02 0.0 cfs 0.0 0.4888 cfs Storage, Irrigation +3 87CW0127
5614.00000 1865-05-151882-12-02 0.0 cfs 0.0 0.1825 cfs Irrigation, Municipal +2 98CW0313
5630.00000 1865-05-311882-12-02 0.0 cfs 0.0 0.1997 cfs Storage, Irrigation +3 98CW0313, 87CW0127
5631.00000 1865-06-011882-12-02 0.0 cfs 0.0 1.8543 cfs Storage, Irrigation +3 98CW0313, 87CW0127
5645.00000 1865-06-151882-12-02 0.0 cfs 0.0 0.2017 cfs Storage, Irrigation +3 87CW0127, 98CW0313
5965.00000 1866-05-011882-12-02 0.0 cfs 0.0 0.127 cfs Storage, Irrigation +3 98CW0313, 87CW0127
6010.00000 1866-06-151882-12-02 0.0 cfs 0.0 0.8175 cfs Storage, Irrigation +3 98CW0313, 87CW0127
6020.00000 1866-06-251882-12-02 14.5013 cfs 0.0 — Irrigation, Municipal +7 93CW0028, 98CW0313 +7
6330.00000 1867-05-011882-12-02 0.0 cfs 0.0 0.6736 cfs Storage, Irrigation +3 87CW0127, 98CW0313
6696.00000 1868-05-011882-12-02 0.0 cfs 0.0 0.4174 cfs Storage, Irrigation +3 98CW0313, 87CW0127
7379.00000 1870-03-151882-12-02 0.0 cfs 0.0 0.6678 cfs Storage, Irrigation +3 87CW0127, 98CW0313
7396.00000 1870-04-011882-12-02 0.0 cfs 0.0 0.2613 cfs Storage, Irrigation +3 98CW0313, 87CW0127
7457.00000 1870-06-011882-12-02 0.0 cfs 0.0 68.0947 cfs Storage, Irrigation +3 87CW0127, 98CW0313
7610.00000 1870-11-011882-12-02 0.0 cfs 0.0 1.1536 cfs Storage, Irrigation +3 98CW0313, 87CW0127
7791.00000 1871-05-011882-12-02 0.0 cfs 0.0 0.3805 cfs Storage, Irrigation +3 98CW0313, 87CW0127
8157.00000 1872-05-011882-12-02 0.0 cfs 0.0 1.4886 cfs Storage, Irrigation +3 87CW0127, 98CW0313
8492.00000 1873-04-011882-12-02 0.0 cfs 0.0 3.4014 cfs Storage, Irrigation +3 98CW0313, 87CW0127
8695.00000 1873-10-211882-12-02 0.0 cfs 0.0 6.8965 cfs Storage, Irrigation +3 87CW0127, 98CW0313
8871.00000 1874-04-151882-12-02 25.0503 cfs 0.0 — Irrigation, Municipal +7 93CW0028, 98CW0313 +7
8887.00000 1874-05-011882-12-02 0.0 cfs 0.0 0.2702 cfs Storage, Irrigation +3 98CW0313, 87CW0127
8901.00000 1874-05-151882-12-02 0.0 cfs 0.0 0.8863 cfs Storage, Irrigation +3 87CW0127, 98CW0313
9236.00000 1875-04-151882-12-02 0.0 cfs 0.0 0.3605 cfs Storage, Irrigation +3 98CW0313, 87CW0127
10697.00000 1879-04-151882-12-02 0.0 cfs 0.0 0.3855 cfs Storage, Irrigation +3 87CW0127, 98CW0313
10715.00000 1879-05-031882-12-02 0.0 cfs 0.0 0.3915 cfs Storage, Irrigation +3 98CW0313, 87CW0127
20890.11323 1880-12-311926-06-01 15.5 cfs 0.0 — Storage CA6673
25171.00000 1918-12-011926-06-01 13.5 cfs 0.0 — Storage CA6673
27910.25172 1918-12-021951-07-23 30.0 cfs 0.0 — Storage CA11715
29219.00000 1929-12-311951-07-23 30.0 cfs 0.0 — Storage CA11715
36798.00000 1950-10-011951-07-23 25.0 cfs 0.0 — Storage CA11715
50978.00000 1989-07-281989-12-31 0.0 cfs 40.0 cfs — Storage 89CW0239
51115.00000 1989-12-121989-12-31 0.0 cfs 0.0 160.0 cfs Irrigation, Municipal +2 89CW0238

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 153.552 cfs decreed rate, the average day over the last 6 year(s) had 78.826 cfs in priority (51% of the decree). No call in effect is a free river — that was 13.9% of days.

On 1371 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 32 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 24.32 cfs 16% 0 11
2025 45.94 cfs 30% 39 0
2024 84.42 cfs 55% 113 0
2023 106.86 cfs 70% 68 0
2022 57.7 cfs 38% 32 0
2021 73.72 cfs 48% 1 0
Show the last 120 days, day by day
DateIn priorityControlling call
2026-10-13 14.501 cfs (9%) SECTION NO 3 DITCH, 1873-09-26 · South Platte River · on a river this source flows into
2026-10-12 14.501 cfs (9%) SECTION NO 3 DITCH, 1873-09-26 · South Platte River · on a river this source flows into
2026-10-11 14.501 cfs (9%) SECTION NO 3 DITCH, 1873-09-26 · South Platte River · on a river this source flows into
2026-10-10 14.501 cfs (9%) SECTION NO 3 DITCH, 1873-09-26 · South Platte River · on a river this source flows into
2026-10-09 14.501 cfs (9%) SECTION NO 3 DITCH, 1873-09-26 · South Platte River · on a river this source flows into
2026-10-08 14.501 cfs (9%) SECTION NO 3 DITCH, 1873-09-26 · South Platte River · on a river this source flows into
2026-10-07 14.501 cfs (9%) SECTION NO 3 DITCH, 1873-09-26 · South Platte River · on a river this source flows into
2026-10-06 14.501 cfs (9%) SECTION NO 3 DITCH, 1873-09-26 · South Platte River · on a river this source flows into
2026-10-05 14.501 cfs (9%) SECTION NO 3 DITCH, 1873-09-26 · South Platte River · on a river this source flows into
2026-10-04 14.501 cfs (9%) SECTION NO 3 DITCH, 1873-09-26 · South Platte River · on a river this source flows into
2026-10-03 14.501 cfs (9%) SECTION NO 3 DITCH, 1873-09-26 · South Platte River · on a river this source flows into
2026-10-02 14.501 cfs (9%) SECTION NO 3 DITCH, 1873-09-26 · South Platte River · on a river this source flows into
2026-10-01 14.501 cfs (9%) SECTION NO 3 DITCH, 1873-09-26 · South Platte River · on a river this source flows into
2026-09-30 14.501 cfs (9%) SECTION NO 3 DITCH, 1873-09-26 · South Platte River · on a river this source flows into
2026-09-29 14.501 cfs (9%) SECTION NO 3 DITCH, 1873-09-26 · South Platte River · on a river this source flows into
2026-09-28 14.501 cfs (9%) SECTION NO 3 DITCH, 1873-09-26 · South Platte River · on a river this source flows into
2026-09-27 14.501 cfs (9%) SECTION NO 3 DITCH, 1873-09-26 · South Platte River · on a river this source flows into
2026-09-26 14.501 cfs (9%) SECTION NO 3 DITCH, 1873-09-26 · South Platte River · on a river this source flows into
2026-09-25 14.501 cfs (9%) SECTION NO 3 DITCH, 1873-09-26 · South Platte River · on a river this source flows into
2026-09-24 14.501 cfs (9%) SECTION NO 3 DITCH, 1873-09-26 · South Platte River · on a river this source flows into
2026-09-23 14.501 cfs (9%) SECTION NO 3 DITCH, 1873-09-26 · South Platte River · on a river this source flows into
2026-09-22 14.501 cfs (9%) SECTION NO 3 DITCH, 1873-09-26 · South Platte River · on a river this source flows into
2026-09-21 14.501 cfs (9%) SECTION NO 3 DITCH, 1873-09-26 · South Platte River · on a river this source flows into
2026-09-20 14.501 cfs (9%) SECTION NO 3 DITCH, 1873-09-26 · South Platte River · on a river this source flows into
2026-09-19 14.501 cfs (9%) SECTION NO 3 DITCH, 1873-09-26 · South Platte River · on a river this source flows into
2026-09-18 14.501 cfs (9%) SECTION NO 3 DITCH, 1873-09-26 · South Platte River · on a river this source flows into
2026-09-17 14.501 cfs (9%) SECTION NO 3 DITCH, 1873-09-26 · South Platte River · on a river this source flows into
2026-09-16 14.501 cfs (9%) SECTION NO 3 DITCH, 1873-09-26 · South Platte River · on a river this source flows into
2026-09-15 14.501 cfs (9%) SECTION NO 3 DITCH, 1873-09-26 · South Platte River · on a river this source flows into
2026-09-14 14.501 cfs (9%) SECTION NO 3 DITCH, 1873-09-26 · South Platte River · on a river this source flows into
2026-09-13 14.501 cfs (9%) SECTION NO 3 DITCH, 1873-09-26 · South Platte River · on a river this source flows into
2026-09-12 14.501 cfs (9%) SECTION NO 3 DITCH, 1873-09-26 · South Platte River · on a river this source flows into
2026-09-11 14.501 cfs (9%) SECTION NO 3 DITCH, 1873-09-26 · South Platte River · on a river this source flows into
2026-09-10 14.501 cfs (9%) SECTION NO 3 DITCH, 1873-09-26 · South Platte River · on a river this source flows into
2026-09-09 14.501 cfs (9%) SECTION NO 3 DITCH, 1873-09-26 · South Platte River · on a river this source flows into
2026-09-08 14.501 cfs (9%) SECTION NO 3 DITCH, 1873-09-26 · South Platte River · on a river this source flows into
2026-09-07 14.501 cfs (9%) SECTION NO 3 DITCH, 1873-09-26 · South Platte River · on a river this source flows into
2026-09-06 14.501 cfs (9%) SECTION NO 3 DITCH, 1873-09-26 · South Platte River · on a river this source flows into
2026-09-05 14.501 cfs (9%) SECTION NO 3 DITCH, 1873-09-26 · South Platte River · on a river this source flows into
2026-09-04 14.501 cfs (9%) SECTION NO 3 DITCH, 1873-09-26 · South Platte River · on a river this source flows into
2026-09-03 14.501 cfs (9%) SECTION NO 3 DITCH, 1873-09-26 · South Platte River · on a river this source flows into
2026-09-02 14.501 cfs (9%) SECTION NO 3 DITCH, 1873-09-26 · South Platte River · on a river this source flows into
2026-09-01 14.501 cfs (9%) SECTION NO 3 DITCH, 1873-09-26 · South Platte River · on a river this source flows into
2026-08-31 14.501 cfs (9%) SECTION NO 3 DITCH, 1873-09-26 · South Platte River · on a river this source flows into
2026-08-30 14.501 cfs (9%) SECTION NO 3 DITCH, 1873-09-26 · South Platte River · on a river this source flows into
2026-08-29 14.501 cfs (9%) SECTION NO 3 DITCH, 1873-09-26 · South Platte River · on a river this source flows into
2026-08-28 14.501 cfs (9%) SECTION NO 3 DITCH, 1873-09-26 · South Platte River · on a river this source flows into
2026-08-27 14.501 cfs (9%) SECTION NO 3 DITCH, 1873-09-26 · South Platte River · on a river this source flows into
2026-08-26 14.501 cfs (9%) SECTION NO 3 DITCH, 1873-09-26 · South Platte River · on a river this source flows into
2026-08-25 14.501 cfs (9%) SECTION NO 3 DITCH, 1873-09-26 · South Platte River · on a river this source flows into
2026-08-24 14.501 cfs (9%) SECTION NO 3 DITCH, 1873-09-26 · South Platte River · on a river this source flows into
2026-08-23 14.501 cfs (9%) SECTION NO 3 DITCH, 1873-09-26 · South Platte River · on a river this source flows into
2026-08-22 14.501 cfs (9%) SECTION NO 3 DITCH, 1873-09-26 · South Platte River · on a river this source flows into
2026-08-21 14.501 cfs (9%) SECTION NO 3 DITCH, 1873-09-26 · South Platte River · on a river this source flows into
2026-08-20 14.501 cfs (9%) SECTION NO 3 DITCH, 1873-09-26 · South Platte River · on a river this source flows into
2026-08-19 14.501 cfs (9%) SECTION NO 3 DITCH, 1873-09-26 · South Platte River · on a river this source flows into
2026-08-18 14.501 cfs (9%) SECTION NO 3 DITCH, 1873-09-26 · South Platte River · on a river this source flows into
2026-08-17 14.501 cfs (9%) SECTION NO 3 DITCH, 1873-09-26 · South Platte River · on a river this source flows into
2026-08-16 14.501 cfs (9%) SECTION NO 3 DITCH, 1873-09-26 · South Platte River · on a river this source flows into
2026-08-15 14.501 cfs (9%) SECTION NO 3 DITCH, 1873-09-26 · South Platte River · on a river this source flows into
2026-08-14 4.834 cfs (3%) WESTERN MUTUAL DITCH, 1866-05-05 · South Platte River · on a river this source flows into
2026-08-13 0.0 cfs (0%) WESTERN MUTUAL DITCH, 1866-05-05 · South Platte River · on a river this source flows into
2026-08-12 0.0 cfs (0%) WESTERN MUTUAL DITCH, 1866-05-05 · South Platte River · on a river this source flows into
2026-08-11 0.0 cfs (0%) WESTERN MUTUAL DITCH, 1866-05-05 · South Platte River · on a river this source flows into
2026-08-10 0.0 cfs (0%) WESTERN MUTUAL DITCH, 1866-05-05 · South Platte River · on a river this source flows into
2026-08-09 0.0 cfs (0%) WESTERN MUTUAL DITCH, 1866-05-05 · South Platte River · on a river this source flows into
2026-08-08 0.0 cfs (0%) WESTERN MUTUAL DITCH, 1866-05-05 · South Platte River · on a river this source flows into
2026-08-07 0.0 cfs (0%) WESTERN MUTUAL DITCH, 1866-05-05 · South Platte River · on a river this source flows into
2026-08-06 0.0 cfs (0%) WESTERN MUTUAL DITCH, 1866-05-05 · South Platte River · on a river this source flows into
2026-08-05 0.0 cfs (0%) WESTERN MUTUAL DITCH, 1866-05-05 · South Platte River · on a river this source flows into
2026-08-04 0.0 cfs (0%) WESTERN MUTUAL DITCH, 1866-05-05 · South Platte River · on a river this source flows into
2026-08-03 0.0 cfs (0%) WESTERN MUTUAL DITCH, 1866-05-05 · South Platte River · on a river this source flows into
2026-08-02 9.668 cfs (6%) WESTERN MUTUAL DITCH, 1866-05-05 · South Platte River · on a river this source flows into
2026-08-01 14.501 cfs (9%) SECTION NO 3 DITCH, 1873-09-26 · South Platte River · on a river this source flows into
2026-07-31 14.501 cfs (9%) SECTION NO 3 DITCH, 1873-09-26 · South Platte River · on a river this source flows into
2026-07-30 14.501 cfs (9%) SECTION NO 3 DITCH, 1873-09-26 · South Platte River · on a river this source flows into
2026-07-29 14.501 cfs (9%) SECTION NO 3 DITCH, 1873-09-26 · South Platte River · on a river this source flows into
2026-07-28 14.501 cfs (9%) SECTION NO 3 DITCH, 1873-09-26 · South Platte River · on a river this source flows into
2026-07-27 14.501 cfs (9%) SECTION NO 3 DITCH, 1873-09-26 · South Platte River · on a river this source flows into
2026-07-26 14.501 cfs (9%) SECTION NO 3 DITCH, 1873-09-26 · South Platte River · on a river this source flows into
2026-07-25 14.501 cfs (9%) SECTION NO 3 DITCH, 1873-09-26 · South Platte River · on a river this source flows into
2026-07-24 14.501 cfs (9%) SECTION NO 3 DITCH, 1873-09-26 · South Platte River · on a river this source flows into
2026-07-23 14.501 cfs (9%) SECTION NO 3 DITCH, 1873-09-26 · South Platte River · on a river this source flows into
2026-07-22 14.501 cfs (9%) SECTION NO 3 DITCH, 1873-09-26 · South Platte River · on a river this source flows into
2026-07-21 14.501 cfs (9%) SECTION NO 3 DITCH, 1873-09-26 · South Platte River · on a river this source flows into
2026-07-20 14.501 cfs (9%) SECTION NO 3 DITCH, 1873-09-26 · South Platte River · on a river this source flows into
2026-07-19 9.668 cfs (6%) SOUTH PLATTE RIVER AT WATERTON, 1860-12-31 · South Platte River · on a river this source flows into
2026-07-18 4.834 cfs (3%) SOUTH PLATTE RIVER AT WATERTON, 1860-12-31 · South Platte River · on a river this source flows into
2026-07-17 14.501 cfs (9%) SECTION NO 3 DITCH, 1873-09-26 · South Platte River · on a river this source flows into
2026-07-16 14.501 cfs (9%) SECTION NO 3 DITCH, 1873-09-26 · South Platte River · on a river this source flows into
2026-07-15 14.501 cfs (9%) SECTION NO 3 DITCH, 1873-09-26 · South Platte River · on a river this source flows into
2026-07-14 14.501 cfs (9%) SECTION NO 3 DITCH, 1873-09-26 · South Platte River · on a river this source flows into
2026-07-13 14.501 cfs (9%) SECTION NO 3 DITCH, 1873-09-26 · South Platte River · on a river this source flows into
2026-07-12 14.501 cfs (9%) SECTION NO 3 DITCH, 1873-09-26 · South Platte River · on a river this source flows into
2026-07-11 14.501 cfs (9%) SECTION NO 3 DITCH, 1873-09-26 · South Platte River · on a river this source flows into
2026-07-10 14.501 cfs (9%) SECTION NO 3 DITCH, 1873-09-26 · South Platte River · on a river this source flows into
2026-07-09 14.501 cfs (9%) SECTION NO 3 DITCH, 1873-09-26 · South Platte River · on a river this source flows into
2026-07-08 14.501 cfs (9%) SECTION NO 3 DITCH, 1873-09-26 · South Platte River · on a river this source flows into
2026-07-07 31.202 cfs (20%) SECTION NO 3 DITCH, 1873-09-26 · South Platte River · on a river this source flows into
2026-07-06 39.552 cfs (26%) LOWER LATHAM DITCH, 1877-11-14 · South Platte River · on a river this source flows into
2026-07-05 39.552 cfs (26%) LOWER LATHAM DITCH, 1877-11-14 · South Platte River · on a river this source flows into
2026-07-04 39.552 cfs (26%) LOWER LATHAM DITCH, 1877-11-14 · South Platte River · on a river this source flows into
2026-07-03 39.552 cfs (26%) LOWER LATHAM DITCH, 1877-11-14 · South Platte River · on a river this source flows into
2026-07-02 39.552 cfs (26%) LOWER LATHAM DITCH, 1877-11-14 · South Platte River · on a river this source flows into
2026-07-01 39.552 cfs (26%) LOWER LATHAM DITCH, 1877-11-14 · South Platte River · on a river this source flows into
2026-06-30 39.552 cfs (26%) LOWER LATHAM DITCH, 1877-11-14 · South Platte River · on a river this source flows into
2026-06-29 39.552 cfs (26%) LOWER LATHAM DITCH, 1877-11-14 · South Platte River · on a river this source flows into
2026-06-28 39.552 cfs (26%) HARMONY DITCH 1, 1897-05-03 · South Platte River · on a river this source flows into
2026-06-27 39.552 cfs (26%) WESTERN MUTUAL DITCH, 1885-11-20 · South Platte River · on a river this source flows into
2026-06-26 39.552 cfs (26%) LOWER LATHAM DITCH, 1877-11-14 · South Platte River · on a river this source flows into
2026-06-25 39.552 cfs (26%) LOWER LATHAM DITCH, 1877-11-14 · South Platte River · on a river this source flows into
2026-06-24 39.552 cfs (26%) LOWER LATHAM DITCH, 1877-11-14 · South Platte River · on a river this source flows into
2026-06-23 39.552 cfs (26%) LOWER LATHAM DITCH, 1877-11-14 · South Platte River · on a river this source flows into
2026-06-22 39.552 cfs (26%) LOWER LATHAM DITCH, 1877-11-14 · South Platte River · on a river this source flows into
2026-06-21 39.552 cfs (26%) LOWER LATHAM DITCH, 1877-11-14 · South Platte River · on a river this source flows into
2026-06-20 39.552 cfs (26%) LOWER LATHAM DITCH, 1877-11-14 · South Platte River · on a river this source flows into
2026-06-19 39.552 cfs (26%) LOWER LATHAM DITCH, 1877-11-14 · South Platte River · on a river this source flows into
2026-06-18 39.552 cfs (26%) LOWER LATHAM DITCH, 1877-11-14 · South Platte River · on a river this source flows into
2026-06-17 39.552 cfs (26%) LOWER LATHAM DITCH, 1877-11-14 · South Platte River · on a river this source flows into
2026-06-16 39.552 cfs (26%) LOWER LATHAM DITCH, 1877-11-14 · South Platte 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: 4875, of which 4875 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 3897.00000 · never out of priority in these seasons
AprMayJunJulAugSep
middle right · admin 7396.00000 · peaks at 10 of 11 seasons
AprMayJunJulAugSep
most junior right · admin 51115.00000 · peaks at 11 of 11 seasons
AprMayJunJulAugSep

Snow sets the clock here. In the driest third of snow years (3 seasons), the call settled in for the season around June 17 (June 3 to June 17 across those years). In the middle third (5 seasons), the call settled in for the season around June 24 (June 17 to June 24 across those years); in 3 of them it never lifted at all. In the wettest third (3 seasons), the call settled in for the season around July 8 (June 17 to July 8 across those years).

Snow years ranked by the district’s April 1 snow-water percentile across 3 SNOTEL sites; 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 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 1,719 AF. Its most recent year on record, 2025, came in at 1,451 AF — 84% 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)
2009 1,936 10th lowest of 15 · 113% of median 164 17.5
2010 2,391 14th lowest of 15 · 139% of median 178 21.0
2013 1,719 8th lowest of 15 · 100% of median 132 18.9
2014 2,423 15th lowest of 15 · 141% of median 173 17.5
2015 1,108 1st lowest of 15 · 64% of median 140 13.0
2016 1,496 5th lowest of 15 · 87% of median 171 13.2
2017 1,285 3rd lowest of 15 · 75% of median 146 16.0
2018 1,199 2nd lowest of 15 · 70% of median 142 12.8
2019 1,690 6th lowest of 15 · 98% of median 190 17.1
2020 2,131 13th lowest of 15 · 124% of median 171 14.0
2021 1,703 7th lowest of 15 · 99% of median 170 12.9
2022 2,030 11th lowest of 15 · 118% of median 182 14.8
2023 1,785 9th lowest of 15 · 104% of median 175 14.9
2024 2,099 12th lowest of 15 · 122% of median 179 28.5
2025 1,451 4th lowest of 15 · 84% of median 173 15.0

Call-derived yield: senior right divertible 100.0% of a median season / 84.1% 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 40 right(s), seniority decoded
diversion record current 3478 measured days, newest 331 day(s) before the data's end (DWR publishes ~1 year in arrears)
record continuity patchy 48% of the irrigation seasons in 1992-2025 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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