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TWIN LAKES RESERVOIR

Structure dossier · WDID 1103503 · 3 · LAKE CREEK · DWR record

Where this page's figures come from

Generated 2026-08-28 00:24 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 1881-03-10 — 163rd most senior of the 1489 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: TURQUOISE RESERVOIR (1881-03-10). Immediately behind: CLEAR CREEK RESERVOIR (1881-03-10).

Decreed rights (34)

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
11392.01881-03-101890-06-19 0.00.0 CIRRMUNCOMINDFIRDOM 81
11428.01881-04-151890-06-19 0.00.0 CIRRMUNCOMINDFIRDOM 86
11443.01881-04-301890-06-19 0.00.0 CIRRMUNCOMINDFIRDOM 87
11450.01881-05-071890-06-19 0.00.0 CSTOIRRMUNINDDOM 89
11474.01881-05-311890-06-19 0.00.0 CIRRMUNCOMINDFIRDOM 90
11657.01881-11-301890-06-19 0.00.0 CIRRMUNCOMINDFIRDOM 95
11803.01882-04-251890-06-19 0.00.0 CSTOIRRMUNINDDOM 109
11808.01882-04-301890-06-19 0.00.0 CIRRMUNCOMINDFIRDOM 110
13641.01887-05-071890-06-19 0.00.0 CSTOIRRMUNINDDOM 159
22888.171511896-12-151913-07-14 20645.30.0 ASTOIRRMUNCOMINDDOM R-3
22888.172551897-03-291913-07-14 33806.70.0 ASTOIRRDOM R-4
33950.325471939-02-101969-07-09 139750.0130843.0 AALL A93-C
38311.01954-11-221984-12-31 0.00.0 CMUNALL
42099.01965-04-061984-12-31 0.00.0 CMUNALL
46159.01976-05-181984-12-31 0.00.0 CMUN
48175.01981-11-241984-12-31 0.00.0 CALL
48942.420991965-04-061984-12-31 0.00.0 CMUNALL
48942.461591976-05-181984-12-31 0.00.0 CMUN
48942.479511981-04-141984-12-31 0.00.0 CIRRMUNCOMINDDOM
48942.481751981-11-241984-12-31 0.00.0 CALL
49673.493871985-03-201986-12-31 0.00.0 CALL
50393.01987-12-211987-12-31 0.00.0 CALL
54783.01999-12-281999-12-31 0.00.0 CMUN
55152.551332000-12-122001-12-31 0.00.0 CSTOIRRMUNCOMINDRECFISFIRDOMAUG
55482.02001-11-262001-12-31 0.00.0 CMUN
55493.02001-12-072001-12-31 0.00.0 CALL
55867.02002-12-162002-12-31 0.00.0 CMUN
56808.02005-07-142005-12-31 0.00.0 AALL
56808.02005-07-142005-12-31 0.00.0 CALL
56970.02005-12-232005-12-31 0.00.0 CALL
58220.02009-05-262009-12-31 0.00.0 CIRRMUNCOMINDFIRDOM
58804.493871985-03-202011-12-31 0.00.0 CALL
59206.02012-02-062009-12-31 0.140.0 AMUNAUG
60265.600212014-05-012015-12-31 0.00.18 AMUNAUG

Recorded use (last 15 years on record)

In a median year this structure has a recorded diversion of 2,726 AF. Its most recent year on record, 2023, came in at 2,684 AF — 98% of that, and 7th 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)
1994 159 1st lowest of 14 · 6% of median — 25 4.8
2007 1,055 3rd lowest of 14 · 39% of median — 54 18.2
2009 290 2nd lowest of 14 · 11% of median — 27 8.2
2011 — no recorded volume 56 0 —
2013 1,362 4th lowest of 14 · 50% of median — 184 8.3
2014 1,720 5th lowest of 14 · 63% of median 31 125 12.7
2015 9,656 14th lowest of 14 · 354% of median 48,438 212 248.1
2016 5,642 11th lowest of 14 · 207% of median 0 307 218.6
2017 7,936 12th lowest of 14 · 291% of median 107 365 237.7
2018 8,972 13th lowest of 14 · 329% of median 546 276 269.0
2019 5,098 10th lowest of 14 · 187% of median 0 245 75.3
2020 2,989 9th lowest of 14 · 110% of median 11,734 305 64.6
2021 2,638 6th lowest of 14 · 97% of median 5,491 245 58.4
2022 2,767 8th lowest of 14 · 102% of median 5,716 365 117.5
2023 2,684 7th lowest of 14 · 98% of median 234 304 140.4

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 34 right(s), seniority decoded
diversion record present 3842 measured days; currency unknown (no data-coverage date to compare against)
record continuity sparse 33% of the irrigation seasons in 1969-2023 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.