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CASTLE ROCK SURFACE DIVERSION 1

Structure dossier · WDID 0800534 · DITCH · EAST PLUM CREEK · DWR record

Where this page's figures come from

Generated 2026-08-27 21:03 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 LITTLETON BOAT CHUTE NO 10 (SOUTH PLATTE RIVER, priority 1994-12-02).

● Fully called out — call at CANAL 3 DITCH (CACHE LA POUDRE RIVER, priority 1870-04-01).

● Fully called out — call at BIG T PLATTE R DITCH (BIG THOMPSON RIVER, priority 1865-11-18).

● Fully called out — call at B H EATON DITCH (CACHE LA POUDRE RIVER, priority 1864-06-09).

● 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 2012-12-18 — 19961st 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: 0816843 (2012-11-30). Immediately behind: 0800535 (2012-12-18).

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. UnitsUsesWhat the court said this water may be used for -- irrigation, municipal supply, augmentation and so on.Case
59522.02012-12-182012-12-31 0.00.0 CMUNAUG
59522.02012-12-182012-12-31 0.00.0 AMUNAUG
59767.02013-08-202013-12-31 0.00.0 CMUNAUG
59767.02013-08-202013-12-31 0.00.0 AMUNAUG
60508.02015-08-312015-12-31 0.00.0 AMUNAUG
60508.02015-08-312015-12-31 4.5225.48 CMUNAUG
61358.02017-12-282017-12-31 0.00.0 CMUNAUG
61726.60952016-11-152019-12-31 0.00.0 CMUN

Recorded use (last 10 years on record)

In a median year this structure has a recorded diversion of 639 AF. Its most recent year on record, 2025, came in at 213 AF — 33% of that, and 2nd lowest of the 10 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)
2016 158 1st lowest of 10 · 25% of median 129 1.3
2017 622 5th lowest of 10 · 97% of median 236 3.4
2018 1,161 10th lowest of 10 · 182% of median 364 4.0
2019 934 8th lowest of 10 · 146% of median 290 5.9
2020 804 7th lowest of 10 · 126% of median 273 4.1
2021 656 6th lowest of 10 · 103% of median 365 4.4
2022 976 9th lowest of 10 · 153% of median 365 7.7
2023 257 3rd lowest of 10 · 40% of median 365 4.3
2024 504 4th lowest of 10 · 79% of median 365 3.3
2025 213 2nd lowest of 10 · 33% of median 304 2.1

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.