Hydrohistorian

← My Water  ·  Print / save as PDF

OLSEN DITCH NO 1

Structure dossier · WDID 5200605 · 1 · PINEY RIVER · DWR record

Where this page's figures come from

Generated 2026-08-27 22:34 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

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 1935-08-10 — 177th most senior of the 562 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: OXFORD RESERVOIR (1935-05-10). Immediately behind: OLSEN DITCH NO 2 (1935-08-10).

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
31267.01935-08-101946-08-30 1.050.0 CIRR 186
31267.01935-08-101946-08-30 2.460.0 CIRR 188A

Recorded use (last 15 years on record)

In a median year this structure has a recorded diversion of 96 AF. Its most recent year on record, 2023, came in at 37 AF — 38% of that, and 2nd 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)
1986 384 13th lowest of 15 · 400% of median 168 1.5
1987 368 12th lowest of 15 · 383% of median 98 3.1
1988 470 15th lowest of 15 · 490% of median 74 3.4
1989 469 14th lowest of 15 · 488% of median 79 3.4
1990 93 7th lowest of 15 · 97% of median 74 1.0
1991 131 9th lowest of 15 · 136% of median 147 1.0
1993 202 10th lowest of 15 · 210% of median 101 1.5
2001 43 4th lowest of 15 · 45% of median 97 0.5
2011 39 3rd lowest of 15 · 41% of median 41 0.5
2013 58 6th lowest of 15 · 60% of median 64 0.6
2015 226 11th lowest of 15 · 235% of median 94 2.5
2016 96 8th lowest of 15 · 100% of median 89 0.8
2017 57 5th lowest of 15 · 59% of median 62 0.5
2019 33 1st lowest of 15 · 34% of median 46 0.4
2023 37 2nd lowest of 15 · 38% of median 68 0.3

How good is our record of it?

Grade B (7/10 points) — the components below are the finding; the letter alone is not.

The rubric, component by component
CheckStateDetail
identity complete name, type, and water source all on file
decreed rights on file 2 right(s), seniority decoded
diversion record present 2562 measured days; currency unknown (no data-coverage date to compare against)
record continuity sparse 24% of the irrigation seasons in 1974-2023 carry measured days
published-record stability stable no upstream revisions recorded against this structure

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.