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BLACKTAIL DITCH

Structure dossier · WDID 5300513 · 1 · BLACKTAIL CREEK · DWR record

Where this page's figures come from

Generated 2026-08-27 20:59 by Hydrohistorian. Sources: DWR HydroBase snapshot HydroBase_CO_20260707 (history) + CDSS REST (current), USGS NWIS cross-checks. Engine v0.5.0 (a1c9146) — 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 1892-12-31 — 207th most senior of the 1231 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: D&RGW RADIUM WELL NO 2 (1888-06-10). Immediately behind: MAUDLIN NO 1 DITCH (1894-05-31).

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. UnitsUsesWhat the court said this water may be used for -- irrigation, municipal supply, augmentation and so on.Case
22232.157061892-12-311913-11-10 4.80.0 CIRR 218
37529.01952-10-011956-02-07 1.312.89 CIRR 388

Recorded use (last 15 years on record)

In a median year this structure has a recorded diversion of 277 AF. Its most recent year on record, 2024, came in at 0 AF — 0% of that, and 1st lowest of the 15 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)
2009 474 15th lowest of 15 · 171% of median 47 110 3.1
2010 277 8th lowest of 15 · 100% of median — 151 5.7
2011 358 11th lowest of 15 · 129% of median — 105 3.4
2012 379 12th lowest of 15 · 137% of median — 118 2.7
2013 298 9th lowest of 15 · 108% of median — 145 2.3
2014 165 3rd lowest of 15 · 60% of median — 184 2.1
2015 389 13th lowest of 15 · 140% of median — 214 2.3
2016 433 14th lowest of 15 · 156% of median — 242 3.1
2017 202 5th lowest of 15 · 73% of median — 215 2.3
2018 218 6th lowest of 15 · 79% of median — 107 2.6
2019 253 7th lowest of 15 · 91% of median — 116 1.1
2020 327 10th lowest of 15 · 118% of median — 62 2.7
2022 124 2nd lowest of 15 · 45% of median — 86 1.4
2023 191 4th lowest of 15 · 69% of median — 96 1.8
2024 0 1st lowest of 15 · 0% of median — 2 0.0

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.