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CHAPMAN FLASHFLOOD DITCH

Structure dossier · WDID 7201047 · 1 · GROVE CREEK · DWR record

Where this page's figures come from

Generated 2026-08-27 23:29 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 1933-06-01 — 764th most senior of the 2166 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: BLOSS DITCH (1917-06-01). Immediately behind: GUNDERSON DITCH (1944-05-10).

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
40013.304671933-06-011972-04-13 0.50.0 CIRR 988

Recorded use (last 15 years on record)

In a median year this structure has a recorded diversion of 23 AF. Its most recent year on record, 2019, came in at 98 AF — 426% of that, and 15th 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)
1998 7 1st lowest of 15 · 30% of median 8 0.5
1999 15 4th lowest of 15 · 65% of median 11 0.8
2000 13 3rd lowest of 15 · 56% of median 10 0.8
2003 88 14th lowest of 15 · 383% of median 90 0.5
2004 16 6th lowest of 15 · 70% of median 12 0.8
2005 11 2nd lowest of 15 · 48% of median 12 0.5
2006 15 4th lowest of 15 · 65% of median 11 0.8
2007 27 10th lowest of 15 · 117% of median 19 1.0
2008 22 7th lowest of 15 · 96% of median 23 0.5
2009 24 9th lowest of 15 · 104% of median 25 0.5
2010 23 8th lowest of 15 · 100% of median 24 0.5
2012 31 12th lowest of 15 · 135% of median 32 0.5
2013 29 11th lowest of 15 · 126% of median 30 0.5
2014 31 12th lowest of 15 · 135% of median 32 0.5
2019 98 15th lowest of 15 · 426% of median 64 1.0

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 1994 measured days; currency unknown (no data-coverage date to compare against)
record continuity sparse 29% of the irrigation seasons in 1987-2019 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.