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ST LOUIS DITCH

Structure dossier · WDID 5400578 · 1 · LITTLE SNAKE RIVER · DWR record

Where this page's figures come from

Generated 2026-08-27 19:53 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 in line

Priority 1893-04-01 — 131st most senior of the 724 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: BASIN DITCH (1900-08-26). Immediately behind: HOME SUPPLY DITCH (1896-04-12).

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
24948.157971893-04-011918-06-17 1.0330.0 CIRR 21C

Recorded use (last 15 years on record)

In a median year this structure has a recorded diversion of 206 AF. Its most recent year on record, 2023, came in at 6 AF — 3% of that, and 1st lowest of the 15 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)
2007 499 14th lowest of 15 · 242% of median 106 3.5
2008 304 9th lowest of 15 · 148% of median 75 3.0
2009 487 12th lowest of 15 · 236% of median 154 4.0
2010 206 8th lowest of 15 · 100% of median 90 2.0
2011 187 7th lowest of 15 · 91% of median 44 2.5
2012 313 10th lowest of 15 · 152% of median 86 2.0
2013 608 15th lowest of 15 · 295% of median 184 2.5
2014 366 11th lowest of 15 · 178% of median 78 5.3
2015 119 5th lowest of 15 · 58% of median 47 1.8
2016 152 6th lowest of 15 · 74% of median 83 2.0
2017 489 13th lowest of 15 · 237% of median 110 2.3
2019 107 4th lowest of 15 · 52% of median 200 0.3
2020 20 2nd lowest of 15 · 10% of median 51 0.2
2021 54 3rd lowest of 15 · 26% of median 138 0.2
2023 6 1st lowest of 15 · 3% of median 33 0.1

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.