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EAST MANCOS HIGHLINE DITCH EXTENSION (EX

Structure dossier · WDID 3400608 · 1 · EAST MANCOS RIVER · DWR record

Where this page's figures come from

Generated 2026-08-27 23:21 by Hydrohistorian. Sources: DWR HydroBase snapshot HydroBase_CO_20260707 (history) + CDSS REST (current), USGS NWIS cross-checks. Engine v0.5.0 (f6d7fdc) — 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 1927-05-15 — 368th most senior of the 495 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: JOHN SEEPAGE DITCH (1925-12-31). Immediately behind: SELLERS WASTE WATER D (1933-12-22).

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
30667.282581927-05-151963-03-22 3.00.0 CIRRSTK 62-39

Recorded use (last 15 years on record)

In a median year this structure has a recorded diversion of 19 AF. Its most recent year on record, 2025, came in at 24 AF — 126% of that, and 11th 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)
2011 172 15th lowest of 15 · 905% of median 51 2.0
2012 13 5th lowest of 15 · 68% of median 22 0.5
2013 7 1st lowest of 15 · 37% of median 28 0.2
2014 62 14th lowest of 15 · 326% of median 21 1.8
2015 29 13th lowest of 15 · 153% of median 39 0.5
2016 27 12th lowest of 15 · 142% of median 80 0.3
2017 7 1st lowest of 15 · 37% of median 52 0.1
2018 12 4th lowest of 15 · 63% of median 37 0.4
2019 14 6th lowest of 15 · 74% of median 31 0.8
2020 19 8th lowest of 15 · 100% of median 53 0.3
2021 7 1st lowest of 15 · 37% of median 93 0.2
2022 19 8th lowest of 15 · 100% of median 365 0.5
2023 18 7th lowest of 15 · 95% of median 365 0.3
2024 20 10th lowest of 15 · 105% of median 366 0.5
2025 24 11th lowest of 15 · 126% of median 304 0.5

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 1 right(s), seniority decoded
diversion record present 1963 measured days; currency unknown (no data-coverage date to compare against)
record continuity sparse 22% of the irrigation seasons in 1984-2025 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.