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RALSTON RES

Structure dossier · WDID 0703324 · RESERVOIR · RALSTON CREEK · DWR record

Where this page's figures come from

Generated 2026-08-28 00:38 by Hydrohistorian. Sources: DWR HydroBase snapshot HydroBase_CO_20260707 (history) + CDSS REST (current), USGS NWIS cross-checks. Engine v0.5.0 (4ab2507) — every figure regenerates from this named code version and data image.

Where it sits

Location as DWR records it. Faint dots are the neighbouring water; click any to open it.

Current administration

● Junior rights called out — call at SWADLEY LONGAN DITCH (RALSTON CREEK, priority 1861-04-09).

● Junior rights called out — call at CLEAR CR PLATTE RIVER D (CLEAR CREEK, priority 1861-11-01).

● Junior rights called out — call at FARMERS INDEPENDENT DITCH (SOUTH PLATTE RIVER, priority 1865-11-20).

Which of its rights are out of priority?

Not computable for this structure: no gage record for this year at this date, so there is nothing to find analogs for.

Where it sits in line

Priority 1860-05-16 — 31st most senior of the 1815 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: BLUNN RES (1860-05-16). Immediately behind: WELCH DITCH (1860-05-19).

On RALSTON CREEK at river mile 45.5, it is 4th of 24 down the reach. Immediately upstream: LONG LAKE DITCH. Immediately downstream: RALSTON-CLEAR CREEK CANAL.

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 (30)

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. UnitsUsesWhat the court said this water may be used for -- irrigation, municipal supply, augmentation and so on.Case
3789.01860-05-161884-10-04 0.00.0 CIRRMUNCOMINDRECFISDOMAUGWLD
3804.01860-05-311884-10-04 0.00.0 CIRRMUNCOMINDRECFISDOMAUGWLD
3805.01860-06-011884-10-04 0.00.0 CIRRMUNCOMINDRECFISDOMAUGWLD
3835.01860-07-011884-10-04 0.00.0 CIRRMUNCOMINDRECFISDOMAUGWLD
4118.01861-04-101884-10-04 0.00.0 CIRRMUNCOMINDRECFISDOMAUGWLD
4535.01862-06-011884-10-04 0.00.0 CIRRMUNCOMINDRECFISDOMAUGWLD
4548.01862-06-141884-10-04 0.00.0 CIRRMUNCOMINDRECFISDOMAUGWLD
4568.01862-07-041884-10-04 0.00.0 CIRRMUNCOMINDRECFISDOMAUGWLD
4896.01863-05-281884-10-04 0.00.0 CIRRMUNCOMINDRECFISDOMAUGWLD
4919.01863-06-201884-10-04 0.00.0 CIRRMUNCOMINDRECFISDOMAUGWLD
5279.01864-06-141884-10-04 0.00.0 CIRRMUNCOMINDRECFISDOMAUGWLD
5285.01864-06-201884-10-04 0.00.0 CIRRMUNCOMINDRECFISDOMAUGWLD
5538.01865-02-281884-10-04 0.00.0 CIRRMUNCOMINDRECFISDOMAUGWLD
5592.01865-04-231884-10-04 0.00.0 CIRRMUNCOMINDRECFISDOMAUGWLD
5605.01865-05-061884-10-04 0.00.0 CIRRMUNCOMINDRECFISDOMAUGWLD
5615.01865-05-161884-10-04 0.00.0 CIRRMUNCOMINDRECFISDOMAUGWLD
6884.01868-11-051884-10-04 0.00.0 CIRRMUNCOMINDRECFISDOMAUGWLD
7449.01870-05-241884-10-04 0.00.0 CIRRMUNCOMINDRECFISDOMAUGWLD
8127.01872-04-011884-10-04 0.00.0 CIRRMUNCOMINDRECFISDOMAUGWLD
10184.01877-11-181884-10-04 0.00.0 CIRRMUNCOMINDRECFISDOMAUGWLD
10546.01878-11-151884-10-04 0.00.0 CIRRMUNCOMINDRECFISDOMAUGWLD
11647.01881-11-201884-10-04 0.00.0 CIRRMUNCOMINDRECFISDOMAUGWLD
13240.01886-04-011895-10-09 0.00.0 CIRRMUNCOMINDRECFISDOMAUGWLD
16549.01895-04-231895-10-09 0.00.0 CIRRMUNCOMINDRECFISDOMAUGWLD
16718.081271872-04-011936-05-13 0.00.0 CIRRMUNCOMINDRECFISDOMAUGWLD
16718.101841877-11-181936-05-13 0.00.0 CIRRMUNCOMINDRECFISDOMAUGWLD
20281.01905-07-121936-05-13 0.00.0 CIRRMUNCOMINDRECFISDOMAUGWLD
29220.01930-01-011953-09-28 11000.00.0 AIRRMUNCOMINDFIRDOMOTH
30254.01932-10-311953-09-28 1758.03210.0 ASTOIRRMUNCOMINDFIRDOMOTH
44925.29221930-01-011973-12-31 7394.04055.0 AMUN

Recorded use (last 15 years on record)

In a median year this structure has a recorded diversion of 43,773 AF. Its most recent year on record, 2025, came in at 43,059 AF — 98% of that, and 3rd lowest of the 7 years with a recorded volume.

This structure records both diversions and reservoir releases — they are separate water movements and are accounted separately below.

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 recordReleased (AF)Days recordedPeak (cfs)
2011 — no recorded volume 2,054 0 —
2012 — no recorded volume 833 0 —
2013 — no recorded volume 4,733 0 —
2014 — no recorded volume 1,593 0 —
2015 — no recorded volume 3,209 0 —
2016 — no recorded volume 57 0 —
2017 — no recorded volume 1,460 0 —
2018 — no recorded volume 732 0 —
2019 4,005 1st lowest of 7 · 9% of median 5,176 119 201.7
2020 65,888 7th lowest of 7 · 150% of median 40,371 366 252.7
2021 41,263 2nd lowest of 7 · 94% of median 19,354 335 224.4
2022 61,608 6th lowest of 7 · 141% of median 22,578 365 275.4
2023 54,564 5th lowest of 7 · 125% of median 39,175 365 207.3
2024 43,773 4th lowest of 7 · 100% of median 17,951 366 198.8
2025 43,059 3rd lowest of 7 · 98% of median 18,932 304 249.2

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 30 right(s), seniority decoded
diversion record current 5443 measured days, newest 282 day(s) before the data's end (DWR publishes ~1 year in arrears)
record continuity sparse 34% 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.