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IRONDALE DITCH

Structure dossier · WDID 3800773 · 1 · SMITH CREEK · DWR record

Where this page's figures come from

Generated 2026-08-27 19:51 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 in line

Priority 1903-07-10 — 324th most senior of the 4788 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: CROWLEY DITCH (1903-06-15). Immediately behind: LIGNITE NO 2 DITCH (1903-05-15).

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
21166.195481903-07-101908-05-18 0.30.0 CIRR 220A

Recorded use (last 12 years on record)

In a median year this structure has a recorded diversion of 132 AF. Its most recent year on record, 1986, came in at 126 AF — 96% of that, and 6th lowest of the 12 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)
1975 147 8th lowest of 12 · 111% of median 149 0.5
1976 379 12th lowest of 12 · 287% of median 138 2.0
1977 67 3rd lowest of 12 · 51% of median 170 0.2
1978 61 1st lowest of 12 · 46% of median 153 0.2
1979 61 1st lowest of 12 · 46% of median 153 0.2
1980 152 9th lowest of 12 · 115% of median 153 0.5
1981 120 5th lowest of 12 · 91% of median 122 0.5
1982 119 4th lowest of 12 · 90% of median 121 0.5
1983 152 9th lowest of 12 · 115% of median 153 0.5
1984 169 11th lowest of 12 · 128% of median 170 0.5
1985 138 7th lowest of 12 · 104% of median 140 0.5
1986 126 6th lowest of 12 · 96% of median 92 0.7

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.