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THOMAS RES
Structure dossier · WDID 0604229 · RESERVOIR · SOUTH BOULDER CREEK · DWR record
Where this page's figures come from
Generated 2026-08-27 21:18 by Hydrohistorian. Sources: DWR HydroBase snapshot HydroBase_CO_20260707 (history) + CDSS REST (current), USGS NWIS cross-checks. Engine v0.5.0 (96d5528) — 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: no administrative call record for this basin.
Where it sits in line
Priority 1891-05-01 — 172nd most senior of the 1867 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: GREENLEE RES 1 (1891-04-15). Immediately behind: LOWER BOULDER EXT RES (1892-02-01).
On SOUTH BOULDER CREEK at river mile 17.5, it is 50th of 58 down the reach. Immediately upstream: TELLER LAKE RES NO 1. Immediately downstream: JONES DONNELLY DITCH.
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 (2)
| 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. | Units | UsesWhat the court said this water may be used for -- irrigation, municipal supply, augmentation and so on. | Case |
|---|---|---|---|---|---|---|---|
| 20188.15096 | 1891-05-01 | 1907-03-13 | 89.0 | 0.0 | A | IRR | |
| 25321.0 | 1919-04-30 | 1926-06-21 | 59.0 | 0.0 | A | IRR |
Recorded use (last 4 years on record)
In a median year this structure has a recorded diversion of 27 AF. Its most recent year on record, 2009, came in at 15 AF — 56% of that, and 1st lowest of the 4 years with a recorded volume.
| Year | Diverted (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 record | Days recorded | Peak (cfs) |
|---|---|---|---|---|
| 1978 | 48 | 4th lowest of 4 · 178% of median | 15 | 2.0 |
| 1979 | 30 | 3rd lowest of 4 · 111% of median | 17 | 1.0 |
| 1980 | 24 | 2nd lowest of 4 · 89% of median | 14 | 1.0 |
| 2009 | 15 | 1st lowest of 4 · 56% of median | 9 | 1.2 |
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.