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WEST RESERVOIR

Structure dossier · WDID 4003411 · 3 · JAY CREEK · DWR record

Where this page's figures come from

Generated 2026-08-28 03:51 by Hydrohistorian. Sources: DWR HydroBase snapshot HydroBase_CO_20260707 (history) + CDSS REST (current), USGS NWIS cross-checks. Engine v0.5.0 (2deb1d7) — 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.

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 1905-10-19 — 1296th most senior of the 4661 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: LONE CABIN RESERVOIR (1905-10-10). Immediately behind: MT VIEW MESA NO 1 DITCH (1905-10-28).

Decreed rights (1)

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
21263.20381905-10-191914-06-23 454.50.0 AIRR A11

Recorded use (last 15 years on record)

In a median year this structure has a recorded diversion of 409 AF. Its most recent year on record, 2004, came in at 119 AF — 29% of that, and 2nd 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)
1990 227 4th lowest of 15 · 56% of median 70 1.8
1991 305 5th lowest of 15 · 75% of median 78 2.6
1992 414 9th lowest of 15 · 101% of median 81 2.7
1993 378 7th lowest of 15 · 92% of median 46 5.8
1994 555 15th lowest of 15 · 136% of median 75 7.0
1995 477 14th lowest of 15 · 117% of median 79 4.0
1996 409 8th lowest of 15 · 100% of median 58 3.6
1997 446 11th lowest of 15 · 109% of median 78 4.0
1998 446 11th lowest of 15 · 109% of median 76 3.0
1999 463 13th lowest of 15 · 113% of median 89 2.7
2000 372 6th lowest of 15 · 91% of median 76 2.5
2001 179 3rd lowest of 15 · 44% of median 38 2.5
2002 99 1st lowest of 15 · 24% of median 21 2.5
2003 421 10th lowest of 15 · 103% of median 61 4.0
2004 119 2nd lowest of 15 · 29% of median 29 2.5

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 1 right(s), seniority decoded
diversion record present 2254 measured days; currency unknown (no data-coverage date to compare against)
record continuity sparse 36% of the irrigation seasons in 1975-2004 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.