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COORS B6
Structure dossier · WDID 0703409 · RESERVOIR · CLEAR CREEK · DWR record
Where this page's figures come from
Generated 2026-08-27 20:34 by Hydrohistorian. Sources: DWR HydroBase snapshot HydroBase_CO_20260707 (history) + CDSS REST (current), USGS NWIS cross-checks. Engine v0.5.0 (4ab2507) — every figure regenerates from this named code version and data image.
Current administration
● In priority — no active call senior to this structure's rights affects its district (23 active call(s) checked).
Which of its rights get called out?
In the 5 past years whose flows most resemble this one (2025, 2016, 2018, 2017, 2020): this structure's most junior right was out of priority in 12 of the next 12 weeks at least once; its most senior right in 12. Its other 1 rights fall between those ends, each taken in priority order.
| Week starting | Most junior right out in | Most senior right out in |
|---|---|---|
| 2026-08-09 | 5 of 5 analog years | 5 of 5 |
| 2026-08-16 | 5 of 5 analog years | 5 of 5 |
| 2026-08-23 | 5 of 5 analog years | 5 of 5 |
| 2026-08-30 | 5 of 5 analog years | 5 of 5 |
| 2026-09-06 | 5 of 5 analog years | 5 of 5 |
| 2026-09-13 | 5 of 5 analog years | 5 of 5 |
| 2026-09-20 | 5 of 5 analog years | 5 of 5 |
| 2026-09-27 | 5 of 5 analog years | 5 of 5 |
How this outlook is built, and what it is not
Flows at COORS B7 LAKE FROM WANNAMAKER DITCH around 2026-08-09 (the newest reading on file) sit at 39% of that gage's own median for this window. The 5 most similar past years with a complete administration record (1950–2026) supply the history; each week asks whether a call senior to a given right's admin number was in force that week of the analog year, using the same controlling-call-per-day computation as the Legal tab. Priority is per RIGHT: a structure with several decrees loses its most junior first, and the columns above are the two ends of its range. A frequency among named historical years, not a probability from a model, and not a forecast of what the division engineer will do. It says how often years whose flow resembled this one were under a call senior to this right in a given week. Snowpack, storage, and the actual administrative decisions of a given season are not modelled. Check the analog years listed: if they do not resemble this year to you, the outlook does not either.
Where it sits in line
Priority 1902-03-04 — 162nd most senior of the 1815 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: COORS B5 (1902-03-04). Immediately behind: COORS B7 (1902-03-04).
On MAINSTEM at river mile 50.3, it is 53rd of 107 down the reach. Immediately upstream: ROCKY MOUNTAIN DITCH RT TO CLEAR CREEK. Immediately downstream: MOUNT OLIVET PL.
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 (3)
| 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 |
|---|---|---|---|---|---|---|---|
| 19055.0 | 1902-03-04 | 1936-05-13 | 0.0 | 0.0 | A | IRRMUNCOMINDRECFISFIRDOMSTKAUG | |
| 43829.42307 | 1965-10-31 | 1970-12-31 | 700.0 | 0.0 | A | IRRMUNCOMINDRECFIRDOMAUGPWRRCH | |
| 61322.0 | 2017-11-22 | 2017-12-31 | 0.0 | 0.0 | C | IRRMUNCOMINDRECFIRDOMAUGRCH |
Recorded use (last 5 years on record)
In a median year this structure has a recorded diversion of 136 AF. Its most recent year on record, 2022, came in at 103 AF — 76% of that, and 2nd lowest of the 5 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) |
|---|---|---|---|---|
| 2018 | 434 | 5th lowest of 5 · 319% of median | 81 | 5.2 |
| 2019 | 207 | 4th lowest of 5 · 152% of median | 18 | 6.9 |
| 2020 | 136 | 3rd lowest of 5 · 100% of median | 16 | 5.7 |
| 2021 | 87 | 1st lowest of 5 · 64% of median | 72 | 5.0 |
| 2022 | 103 | 2nd lowest of 5 · 76% of median | 303 | 5.0 |
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.