Hydrohistorian

← My Water  ·  Print / save as PDF

CHAPMAN DITCH NO 1

Structure dossier · WDID 7201043 · 1 · GROVE CREEK · DWR record

Where this page's figures come from

Generated 2026-08-28 00:10 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 1900-06-01 — 748th 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: HILL DITCH (1897-05-01). Immediately behind: CHAPMAN DITCH NO 2 (1900-06-01).

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
40013.184141900-06-011972-04-13 0.60.0 CIRRSTK 956

Recorded use (last 15 years on record)

In a median year this structure has a recorded diversion of 189 AF. Its most recent year on record, 2019, came in at 140 AF — 74% of that, and 5th 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)
1999 189 8th lowest of 15 · 100% of median 122 0.9
2000 306 13th lowest of 15 · 162% of median 214 0.9
2001 166 7th lowest of 15 · 88% of median 163 0.9
2002 84 2nd lowest of 15 · 44% of median 181 0.5
2003 367 15th lowest of 15 · 194% of median 304 0.8
2004 189 8th lowest of 15 · 100% of median 122 0.9
2005 224 10th lowest of 15 · 118% of median 225 0.6
2006 234 12th lowest of 15 · 124% of median 213 0.9
2009 120 3rd lowest of 15 · 64% of median 122 0.5
2010 120 3rd lowest of 15 · 64% of median 122 0.5
2012 73 1st lowest of 15 · 39% of median 61 0.6
2013 362 14th lowest of 15 · 192% of median 304 0.6
2014 230 11th lowest of 15 · 122% of median 245 0.6
2015 148 6th lowest of 15 · 78% of median 304 0.6
2019 140 5th lowest of 15 · 74% of median 135 0.8

How good is our record of it?

Grade A (9/10 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 5461 measured days; currency unknown (no data-coverage date to compare against)
record continuity continuous 79% 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.