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ROCKY FORD DITCH

Structure dossier · WDID 1700558 · DITCH · ARKANSAS RIVER · DWR record · probably ROCKY FORD CITY OF’s (matched on DWR’s contact or an EPA intake name; verify below)

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 2026-10-12 10:48 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

ROCKY FORD DITCH holds 3 decreed rights on ARKANSAS RIVER. As of 2026-09-27, 1 of them are out of priority under a call at admin 20186.17015 placed by JOHN MARTIN RESERVOIR. Its 2 most senior rights, back to 1874-05-15, keep diverting. 12 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 14,421 acre-feet. It was a party to 2 court cases that also touched 9 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 ARKANSAS RIVER COMPACT(COLORADO-KANSAS STATE LINE) (ARKANSAS RIVER, priority 1949-05-30).

● Junior rights called out — call at JOHN MARTIN RESERVOIR (ARKANSAS RIVER, priority 1905-04-07).

Which of its rights are out of priority?

Under today's controlling call (JOHN MARTIN RESERVOIR, priority 1905-04-07): 1 of this structure's 3 rights are out of priority now. (12 call(s) state no district and sit outside this one — not judged, not assumed.) In the 5 past years most like this one (2023, 2022, 2021, 2020, 2019), 2 of the rights shown below were out at least one week in at least one analog year.

Right (priority)NowAnalog years outMajority out by
1874-05-15 8901 ● in priority 0 of 5 —
1890-05-06 14736 ● in priority 5 of 5 2026-09-27
2004-05-27 56979 ● 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 CATLIN CANAL AT CATLIN DAM NEAR FOWLER around 2026-09-27 (the newest reading on file) — currently 0% of that gage's own median for this window — to pick the 5 most similar past years with complete administration records (2005–2026). 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 1874-05-15 — 4th most senior of the 1909 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: 1700541 (1867-09-21). Immediately behind: CATLIN CANAL (1875-04-10).

On MAINSTEM at river mile 35.6, it is 94th of 458 down the reach. Immediately upstream: 1713327. Immediately downstream: MANZANOLA WWTP RETURNS.

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 (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
8901.00000 1874-05-151905-04-08 111.76 cfs 0.0 — Irrigation, Municipal +6 1
14736.00000 1890-05-061905-04-08 4.43 cfs 0.0 — Irrigation 14
56978.56395 2004-05-272006-12-31 0.0 cfs 0.0 212.0 cfs All beneficial uses 06CW0120

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 116.19 cfs decreed rate, the average day over the last 6 year(s) had 109.432 cfs in priority (94% of the decree). No call in effect is a free river — that was 0.0% of days.

On 1097 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.

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 72.06 cfs 62% 0 59
2025 111.76 cfs 96% 0 0
2024 112.33 cfs 97% 0 0
2023 112.92 cfs 97% 0 0
2022 111.76 cfs 96% 0 0
2021 114.33 cfs 98% 0 0
Show the last 120 days, day by day
DateIn priorityControlling call
2026-10-11 111.76 cfs (96%) SUNNYSIDE PARK DITCH, 1884-01-03 · Arkansas River · same source, at or above the calling point
2026-10-10 111.76 cfs (96%) SUNNYSIDE PARK DITCH, 1884-01-03 · Arkansas River · same source, at or above the calling point
2026-10-09 111.76 cfs (96%) SUNNYSIDE PARK DITCH, 1884-01-03 · Arkansas River · same source, at or above the calling point
2026-10-08 111.76 cfs (96%) SUNNYSIDE PARK DITCH, 1884-01-03 · Arkansas River · same source, at or above the calling point
2026-10-07 111.76 cfs (96%) SUNNYSIDE PARK DITCH, 1884-01-03 · Arkansas River · same source, at or above the calling point
2026-10-06 111.76 cfs (96%) SUNNYSIDE PARK DITCH, 1884-01-03 · Arkansas River · same source, at or above the calling point
2026-10-05 111.76 cfs (96%) SUNNYSIDE PARK DITCH, 1884-01-03 · Arkansas River · same source, at or above the calling point
2026-10-04 111.76 cfs (96%) SUNNYSIDE PARK DITCH, 1884-01-03 · Arkansas River · same source, at or above the calling point
2026-10-03 111.76 cfs (96%) SUNNYSIDE PARK DITCH, 1884-01-03 · Arkansas River · same source, at or above the calling point
2026-10-02 111.76 cfs (96%) SUNNYSIDE PARK DITCH, 1884-01-03 · Arkansas River · same source, at or above the calling point
2026-10-01 111.76 cfs (96%) SUNNYSIDE PARK DITCH, 1884-01-03 · Arkansas River · same source, at or above the calling point
2026-09-30 111.76 cfs (96%) SUNNYSIDE PARK DITCH, 1884-01-03 · Arkansas River · same source, at or above the calling point
2026-09-29 111.76 cfs (96%) SUNNYSIDE PARK DITCH, 1884-01-03 · Arkansas River · same source, at or above the calling point
2026-09-28 111.76 cfs (96%) SUNNYSIDE PARK DITCH, 1884-01-03 · Arkansas River · same source, at or above the calling point
2026-09-27 111.76 cfs (96%) SUNNYSIDE PARK DITCH, 1884-01-03 · Arkansas River · same source, at or above the calling point
2026-09-26 111.76 cfs (96%) SUNNYSIDE PARK DITCH, 1884-01-03 · Arkansas River · same source, at or above the calling point
2026-09-25 111.76 cfs (96%) SUNNYSIDE PARK DITCH, 1884-01-03 · Arkansas River · same source, at or above the calling point
2026-09-24 111.76 cfs (96%) SUNNYSIDE PARK DITCH, 1884-01-03 · Arkansas River · same source, at or above the calling point
2026-09-23 111.76 cfs (96%) BESSEMER DITCH, 1882-03-31 · Arkansas River · same source, at or above the calling point
2026-09-22 111.76 cfs (96%) SOUTH CANON DITCH, 1880-10-01 · Arkansas River · same source, at or above the calling point
2026-09-21 111.76 cfs (96%) ROCKY FORD DITCH, 1875-12-31 · Arkansas River · same source, at or above the calling point
2026-09-20 111.76 cfs (96%) ROCKY FORD DITCH, 1875-12-31 · Arkansas River · same source, at or above the calling point
2026-09-19 111.76 cfs (96%) ROCKY FORD DITCH, 1875-12-31 · Arkansas River · same source, at or above the calling point
2026-09-18 74.507 cfs (64%) CANON CITY & OIL CREEK, 1867-05-31 · Arkansas River · same source, at or above the calling point
2026-09-17 0.0 cfs (0%) CANON CITY & OIL CREEK, 1867-05-31 · Arkansas River · same source, at or above the calling point
2026-09-16 0.0 cfs (0%) CANON CITY & OIL CREEK, 1867-05-31 · Arkansas River · same source, at or above the calling point
2026-09-15 0.0 cfs (0%) CANON CITY & OIL CREEK, 1867-05-31 · Arkansas River · same source, at or above the calling point
2026-09-14 0.0 cfs (0%) PBWW NORTHSIDE INTAKE, 1874-04-01 · Arkansas River · same source, at or above the calling point
2026-09-13 0.0 cfs (0%) PBWW NORTHSIDE INTAKE, 1874-04-01 · Arkansas River · same source, at or above the calling point
2026-09-12 0.0 cfs (0%) PBWW NORTHSIDE INTAKE, 1874-04-01 · Arkansas River · same source, at or above the calling point
2026-09-11 0.0 cfs (0%) BESSEMER DITCH, 1867-01-08 · Arkansas River · same source, at or above the calling point
2026-09-10 0.0 cfs (0%) BESSEMER DITCH, 1867-01-08 · Arkansas River · same source, at or above the calling point
2026-09-09 0.0 cfs (0%) BESSEMER DITCH, 1867-01-08 · Arkansas River · same source, at or above the calling point
2026-09-08 0.0 cfs (0%) BESSEMER DITCH, 1867-01-08 · Arkansas River · same source, at or above the calling point
2026-09-07 0.0 cfs (0%) BESSEMER DITCH, 1867-01-08 · Arkansas River · same source, at or above the calling point
2026-09-06 0.0 cfs (0%) ROCKY FORD HIGHLINE, 1869-07-01 · Arkansas River · same source, at or above the calling point
2026-09-05 0.0 cfs (0%) PBWW NORTHSIDE INTAKE, 1874-04-01 · Arkansas River · same source, at or above the calling point
2026-09-04 0.0 cfs (0%) PBWW NORTHSIDE INTAKE, 1874-04-01 · Arkansas River · same source, at or above the calling point
2026-09-03 0.0 cfs (0%) PBWW NORTHSIDE INTAKE, 1874-04-01 · Arkansas River · same source, at or above the calling point
2026-09-02 37.253 cfs (32%) PBWW NORTHSIDE INTAKE, 1874-04-01 · Arkansas River · same source, at or above the calling point
2026-09-01 111.76 cfs (96%) FORT LYON CANAL, 1884-04-15 · Arkansas River · same source, at or above the calling point
2026-08-31 111.76 cfs (96%) FORT LYON CANAL, 1884-04-15 · Arkansas River · same source, at or above the calling point
2026-08-30 111.76 cfs (96%) FORT LYON CANAL, 1884-04-15 · Arkansas River · same source, at or above the calling point
2026-08-29 111.76 cfs (96%) BESSEMER DITCH, 1882-03-31 · Arkansas River · same source, at or above the calling point
2026-08-28 111.76 cfs (96%) BESSEMER DITCH, 1882-03-31 · Arkansas River · same source, at or above the calling point
2026-08-27 111.76 cfs (96%) BESSEMER DITCH, 1882-03-31 · Arkansas River · same source, at or above the calling point
2026-08-26 111.76 cfs (96%) BESSEMER DITCH, 1882-03-31 · Arkansas River · same source, at or above the calling point
2026-08-25 74.507 cfs (64%) PBWW NORTHSIDE INTAKE, 1874-04-01 · Arkansas River · same source, at or above the calling point
2026-08-24 0.0 cfs (0%) PBWW NORTHSIDE INTAKE, 1874-04-01 · Arkansas River · same source, at or above the calling point
2026-08-23 0.0 cfs (0%) PBWW NORTHSIDE INTAKE, 1874-04-01 · Arkansas River · same source, at or above the calling point
2026-08-22 0.0 cfs (0%) PBWW NORTHSIDE INTAKE, 1874-04-01 · Arkansas River · same source, at or above the calling point
2026-08-21 0.0 cfs (0%) PBWW NORTHSIDE INTAKE, 1874-04-01 · Arkansas River · same source, at or above the calling point
2026-08-20 0.0 cfs (0%) PBWW NORTHSIDE INTAKE, 1874-04-01 · Arkansas River · same source, at or above the calling point
2026-08-19 37.253 cfs (32%) PBWW NORTHSIDE INTAKE, 1874-04-01 · Arkansas River · same source, at or above the calling point
2026-08-18 111.76 cfs (96%) WILLIAMS & HAMM DITCH, 1875-12-31 · Arkansas River · same source, at or above the calling point
2026-08-17 111.76 cfs (96%) WILLIAMS & HAMM DITCH, 1875-12-31 · Arkansas River · same source, at or above the calling point
2026-08-16 74.507 cfs (64%) PBWW NORTHSIDE INTAKE, 1874-04-01 · Arkansas River · same source, at or above the calling point
2026-08-15 0.0 cfs (0%) PBWW NORTHSIDE INTAKE, 1874-04-01 · Arkansas River · same source, at or above the calling point
2026-08-14 0.0 cfs (0%) PBWW NORTHSIDE INTAKE, 1874-04-01 · Arkansas River · same source, at or above the calling point
2026-08-13 0.0 cfs (0%) PBWW NORTHSIDE INTAKE, 1874-04-01 · Arkansas River · same source, at or above the calling point
2026-08-12 0.0 cfs (0%) PBWW NORTHSIDE INTAKE, 1874-04-01 · Arkansas River · same source, at or above the calling point
2026-08-11 0.0 cfs (0%) ROCKY FORD HIGHLINE, 1870-12-31 · Arkansas River · same source, at or above the calling point
2026-08-10 0.0 cfs (0%) CANON CITY & OIL CREEK, 1867-05-31 · Arkansas River · same source, at or above the calling point
2026-08-09 0.0 cfs (0%) CANON CITY & OIL CREEK, 1867-05-31 · Arkansas River · same source, at or above the calling point
2026-08-08 0.0 cfs (0%) CANON CITY & OIL CREEK, 1867-05-31 · Arkansas River · same source, at or above the calling point
2026-08-07 0.0 cfs (0%) CANON CITY & OIL CREEK, 1867-05-31 · Arkansas River · same source, at or above the calling point
2026-08-06 0.0 cfs (0%) CANON CITY & OIL CREEK, 1867-05-31 · Arkansas River · same source, at or above the calling point
2026-08-05 0.0 cfs (0%) ROCKY FORD HIGHLINE, 1869-07-01 · Arkansas River · same source, at or above the calling point
2026-08-04 37.253 cfs (32%) ROCKY FORD HIGHLINE, 1869-07-01 · Arkansas River · same source, at or above the calling point
2026-08-03 111.76 cfs (96%) BESSEMER DITCH, 1881-06-20 · Arkansas River · same source, at or above the calling point
2026-08-02 111.76 cfs (96%) FORT LYON CANAL, 1884-12-03 · Arkansas River · same source, at or above the calling point
2026-08-01 111.76 cfs (96%) FORT LYON CANAL, 1884-12-03 · Arkansas River · same source, at or above the calling point
2026-07-31 111.76 cfs (96%) FORT LYON CANAL, 1884-12-03 · Arkansas River · same source, at or above the calling point
2026-07-30 111.76 cfs (96%) SOUTH CANON DITCH, 1882-05-31 · Arkansas River · same source, at or above the calling point
2026-07-29 111.76 cfs (96%) ROCKY FORD DITCH, 1874-05-15 · Arkansas River · same source, at or above the calling point
2026-07-28 111.76 cfs (96%) ROCKY FORD DITCH, 1874-05-15 · Arkansas River · same source, at or above the calling point
2026-07-27 111.76 cfs (96%) ROCKY FORD DITCH, 1875-12-31 · Arkansas River · same source, at or above the calling point
2026-07-26 111.76 cfs (96%) ROCKY FORD DITCH, 1875-12-31 · Arkansas River · same source, at or above the calling point
2026-07-25 111.76 cfs (96%) ROCKY FORD DITCH, 1875-12-31 · Arkansas River · same source, at or above the calling point
2026-07-24 74.507 cfs (64%) ROCKY FORD DITCH, 1874-04-01 · Arkansas River · same source, at or above the calling point
2026-07-23 0.0 cfs (0%) CANON CITY & OIL CREEK, 1867-05-31 · Arkansas River · same source, at or above the calling point
2026-07-22 0.0 cfs (0%) CANON CITY & OIL CREEK, 1867-05-31 · Arkansas River · same source, at or above the calling point
2026-07-21 0.0 cfs (0%) CANON CITY & OIL CREEK, 1867-05-31 · Arkansas River · same source, at or above the calling point
2026-07-20 0.0 cfs (0%) OXFORD CANAL, 1869-07-01 · Arkansas River · same source, at or above the calling point
2026-07-19 0.0 cfs (0%) PBWW NORTHSIDE INTAKE, 1874-04-01 · Arkansas River · same source, at or above the calling point
2026-07-18 0.0 cfs (0%) PBWW NORTHSIDE INTAKE, 1874-04-01 · Arkansas River · same source, at or above the calling point
2026-07-17 0.0 cfs (0%) PBWW NORTHSIDE INTAKE, 1874-04-01 · Arkansas River · same source, at or above the calling point
2026-07-16 0.0 cfs (0%) PBWW NORTHSIDE INTAKE, 1874-04-01 · Arkansas River · same source, at or above the calling point
2026-07-15 0.0 cfs (0%) PBWW NORTHSIDE INTAKE, 1874-04-01 · Arkansas River · same source, at or above the calling point
2026-07-14 0.0 cfs (0%) PBWW NORTHSIDE INTAKE, 1874-04-01 · Arkansas River · same source, at or above the calling point
2026-07-13 0.0 cfs (0%) PBWW NORTHSIDE INTAKE, 1874-04-01 · Arkansas River · same source, at or above the calling point
2026-07-12 0.0 cfs (0%) PBWW NORTHSIDE INTAKE, 1874-04-01 · Arkansas River · same source, at or above the calling point
2026-07-11 0.0 cfs (0%) PBWW NORTHSIDE INTAKE, 1874-04-01 · Arkansas River · same source, at or above the calling point
2026-07-10 0.0 cfs (0%) PBWW NORTHSIDE INTAKE, 1874-04-01 · Arkansas River · same source, at or above the calling point
2026-07-09 0.0 cfs (0%) PBWW NORTHSIDE INTAKE, 1874-04-01 · Arkansas River · same source, at or above the calling point
2026-07-08 0.0 cfs (0%) PBWW NORTHSIDE INTAKE, 1874-04-01 · Arkansas River · same source, at or above the calling point
2026-07-07 0.0 cfs (0%) PBWW NORTHSIDE INTAKE, 1874-04-01 · Arkansas River · same source, at or above the calling point
2026-07-06 0.0 cfs (0%) PBWW NORTHSIDE INTAKE, 1874-04-01 · Arkansas River · same source, at or above the calling point
2026-07-05 0.0 cfs (0%) PBWW NORTHSIDE INTAKE, 1874-04-01 · Arkansas River · same source, at or above the calling point
2026-07-04 0.0 cfs (0%) PBWW NORTHSIDE INTAKE, 1874-04-01 · Arkansas River · same source, at or above the calling point
2026-07-03 0.0 cfs (0%) PBWW NORTHSIDE INTAKE, 1874-04-01 · Arkansas River · same source, at or above the calling point
2026-07-02 0.0 cfs (0%) PBWW NORTHSIDE INTAKE, 1874-04-01 · Arkansas River · same source, at or above the calling point
2026-07-01 37.253 cfs (32%) PBWW NORTHSIDE INTAKE, 1874-04-01 · Arkansas River · same source, at or above the calling point
2026-06-30 111.76 cfs (96%) WILLIAMS & HAMM DITCH, 1875-12-31 · Arkansas River · same source, at or above the calling point
2026-06-29 111.76 cfs (96%) BESSEMER DITCH, 1882-03-31 · Arkansas River · same source, at or above the calling point
2026-06-28 111.76 cfs (96%) BESSEMER DITCH, 1882-03-31 · Arkansas River · same source, at or above the calling point
2026-06-27 111.76 cfs (96%) BESSEMER DITCH, 1875-12-31 · Arkansas River · same source, at or above the calling point
2026-06-26 111.76 cfs (96%) BESSEMER DITCH, 1875-12-31 · Arkansas River · same source, at or above the calling point
2026-06-25 74.507 cfs (64%) PBWW NORTHSIDE INTAKE, 1874-04-01 · Arkansas River · same source, at or above the calling point
2026-06-24 0.0 cfs (0%) PBWW NORTHSIDE INTAKE, 1874-04-01 · Arkansas River · same source, at or above the calling point
2026-06-23 0.0 cfs (0%) PBWW NORTHSIDE INTAKE, 1874-04-01 · Arkansas River · same source, at or above the calling point
2026-06-22 37.253 cfs (32%) PBWW NORTHSIDE INTAKE, 1874-04-01 · Arkansas River · same source, at or above the calling point
2026-06-21 111.76 cfs (96%) FORT LYON CANAL, 1882-05-31 · Arkansas River · same source, at or above the calling point
2026-06-20 111.76 cfs (96%) FORT LYON CANAL, 1882-05-31 · Arkansas River · same source, at or above the calling point
2026-06-19 111.76 cfs (96%) ROCKY FORD DITCH, 1882-03-31 · Arkansas River · same source, at or above the calling point
2026-06-18 111.76 cfs (96%) ROCKY FORD DITCH, 1882-03-31 · Arkansas River · same source, at or above the calling point
2026-06-17 111.76 cfs (96%) ROCKY FORD DITCH, 1874-05-15 · Arkansas River · same source, at or above the calling point
2026-06-16 111.76 cfs (96%) ROCKY FORD DITCH, 1874-05-15 · Arkansas River · same source, at or above the calling point
2026-06-15 111.76 cfs (96%) SOUTH CANON DITCH, 1882-05-31 · Arkansas River · same source, at or above the calling point
2026-06-14 111.76 cfs (96%) SOUTH CANON DITCH, 1882-05-31 · Arkansas River · same source, at or above the calling point
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: 1867.

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 14,421 AF. Its most recent year on record, 2025, came in at 15,668 AF — 109% of that, and 13th 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 21,275 14th lowest of 15 · 148% of median 257 57.3
2012 10,133 2nd lowest of 15 · 70% of median 254 52.1
2013 24,241 15th lowest of 15 · 168% of median 262 100.0
2014 14,669 9th lowest of 15 · 102% of median 261 40.0
2015 3,090 1st lowest of 15 · 21% of median 264 6.3
2016 14,064 6th lowest of 15 · 98% of median 303 33.6
2017 13,812 4th lowest of 15 · 96% of median 306 33.0
2018 14,255 7th lowest of 15 · 99% of median 365 34.3
2019 13,881 5th lowest of 15 · 96% of median 319 33.7
2020 15,363 11th lowest of 15 · 106% of median 334 38.4
2021 15,076 10th lowest of 15 · 104% of median 365 62.8
2022 14,421 8th lowest of 15 · 100% of median 365 62.1
2023 13,018 3rd lowest of 15 · 90% of median 365 65.3
2024 15,625 12th lowest of 15 · 108% of median 366 70.2
2025 15,668 13th lowest of 15 · 109% of median 304 77.8

Call-derived yield: senior right divertible 0.0% of a median season / 0.0% dry-year.

How good is our record of it?

Grade A (10/10 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 current 35463 measured days, newest 331 day(s) before the data's end (DWR publishes ~1 year in arrears)
record continuity continuous 100% of the irrigation seasons in 1910-2025 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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