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ROCK CREEK ABOVE CONFLUENCE WITH TARRYALL CREEK

Structure dossier · WDID 2302915 · STREAM GAGE · ROCK CREEK · DWR record

Where this page's figures come from

Generated 2026-08-27 23:13 by Hydrohistorian. Sources: DWR HydroBase snapshot HydroBase_CO_20260707 (history) + CDSS REST (current), USGS NWIS cross-checks. Engine v0.5.0 (0576005) — 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

● Fully called out — call at LAST CHANCE DITCH 2 (SOUTH PLATTE RIVER, priority 1863-12-30).

Which of its rights are out of priority?

Not computable for this structure: this structure is not on the modelled flow network, so no reference gage can honestly stand in for it.

Where it sits in line

Priority 1872-05-01 — 390th most senior of the 21881 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: 0801393 (1872-04-30). Immediately behind: 2302918 (1872-05-15).

Decreed rights (26)

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
8157.01872-05-011889-10-18 29.00.0 AIRRMUNCOMINDRECFISFIRDOMCUROTH
8157.01872-05-011889-10-18 0.30.0 CIRRMUNCOMINDRECFISFIRDOMCUROTH
8202.01872-06-151889-10-18 26.00.0 AIRRMUNCOMINDRECFISFIRDOMCUROTH
8202.01872-06-151889-10-18 0.30.0 CIRRMUNCOMINDRECFISFIRDOMCUROTH
8541.01873-05-201889-10-18 71.00.0 AIRRMUNCOMINDRECFISFIRDOMCUROTH
8541.01873-05-201889-10-18 0.80.0 CIRRMUNCOMINDRECFISFIRDOMCUROTH
9252.01875-05-011889-10-18 0.60.0 CIRRMUNCOMINDRECFISFIRDOMCUROTH
9252.01875-05-011889-10-18 47.00.0 AIRRMUNCOMINDRECFISFIRDOMCUROTH
9649.01876-06-011889-10-18 0.30.0 CIRRMUNCOMINDRECFISFIRDOMCUROTH
9649.01876-06-011889-10-18 26.00.0 AIRRMUNCOMINDRECFISFIRDOMCUROTH
9983.01877-05-011889-10-18 7.00.0 AIRRMUNCOMINDRECFISFIRDOMCUROTH
9983.01877-05-011889-10-18 0.20.0 CIRRMUNCOMINDRECFISFIRDOMCUROTH
10043.01877-06-301889-10-18 43.00.0 AIRRMUNCOMINDRECFISFIRDOMCUROTH
10043.01877-06-301889-10-18 0.50.0 CIRRMUNCOMINDRECFISFIRDOMCUROTH
11110.01880-06-011889-10-18 0.30.0 CIRRMUNCOMINDRECFISFIRDOMCUROTH
11110.01880-06-011889-10-18 14.00.0 AIRRMUNCOMINDRECFISFIRDOMCUROTH
11118.01880-06-091889-10-18 7.00.0 AIRRMUNCOMINDRECFISFIRDOMCUROTH
11118.01880-06-091889-10-18 0.20.0 CIRRMUNCOMINDRECFISFIRDOMCUROTH
11809.01882-05-011889-10-18 29.00.0 AIRRMUNCOMINDRECFISFIRDOMCUROTH
11809.01882-05-011889-10-18 0.50.0 CIRRMUNCOMINDRECFISFIRDOMCUROTH
11829.01882-05-211889-10-18 28.00.0 AIRRMUNCOMINDRECFISFIRDOMCUROTH
11829.01882-05-211889-10-18 0.60.0 CIRRMUNCOMINDRECFISFIRDOMCUROTH
12554.01884-05-151889-10-18 0.30.0 CIRRMUNCOMINDRECFISFIRDOMCUROTH
12554.01884-05-151889-10-18 21.00.0 AIRRMUNCOMINDRECFISFIRDOMCUROTH
12560.01884-05-211889-10-18 11.00.0 AIRRMUNCOMINDRECFISFIRDOMCUROTH
12560.01884-05-211889-10-18 0.20.0 CIRRMUNCOMINDRECFISFIRDOMCUROTH

Recorded use (last 15 years on record)

In a median year this structure has a recorded diversion of 396 AF. Its most recent year on record, 2024, came in at 485 AF — 123% of that, and 12th lowest of the 14 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)
2010 — no recorded volume 141 0 —
2011 294 4th lowest of 14 · 74% of median 294 54 4.3
2012 117 1st lowest of 14 · 30% of median 117 35 4.3
2013 396 8th lowest of 14 · 100% of median 396 84 4.3
2014 528 13th lowest of 14 · 134% of median 528 93 4.3
2015 547 14th lowest of 14 · 138% of median 547 93 4.3
2016 316 5th lowest of 14 · 80% of median 316 93 4.3
2017 448 11th lowest of 14 · 113% of median 448 93 4.3
2018 219 2nd lowest of 14 · 55% of median 219 70 4.3
2019 386 6th lowest of 14 · 98% of median 386 93 4.4
2020 415 9th lowest of 14 · 105% of median 415 68 4.3
2021 395 7th lowest of 14 · 100% of median 395 88 4.3
2022 271 3rd lowest of 14 · 68% of median 271 70 4.3
2023 418 10th lowest of 14 · 106% of median 418 93 4.3
2024 485 12th lowest of 14 · 123% of median 485 90 4.4

How good is our record of it?

Grade B (7/10 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 26 right(s), seniority decoded
diversion record present 2268 measured days; currency unknown (no data-coverage date to compare against)
record continuity sparse 29% of the irrigation seasons in 1988-2024 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.