Hydrohistorian

← My Water  ·  Print / save as PDF

CALAHAN DITCH

Structure dossier · WDID 8000751 · DITCH · GIBBS GULCH · DWR record

Where this page's figures come from

Generated 2026-08-27 21:08 by Hydrohistorian. Sources: DWR HydroBase snapshot HydroBase_CO_20260707 (history) + CDSS REST (current), USGS NWIS cross-checks. Engine v0.5.0 (0576005) — 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.

Current administration

● Fully called out — call at CANAL 3 DITCH (CACHE LA POUDRE RIVER, priority 1870-04-01).

● Fully called out — call at BIG T PLATTE R DITCH (BIG THOMPSON RIVER, priority 1865-11-18).

● Fully called out — call at B H EATON DITCH (CACHE LA POUDRE RIVER, priority 1864-06-09).

● Fully called out — call at LAST CHANCE DITCH 2 (SOUTH PLATTE RIVER, priority 1863-12-30).

● Fully called out — call at HILLSBOROUGH DITCH (BIG THOMPSON RIVER, priority 1861-11-10).

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 1887-05-01 — 729th most senior of the 21881 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: 2302432 (1887-05-01). Immediately behind: 8001553 (1887-05-31).

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
13635.01887-05-011913-05-22 0.50.0 CIRR
13879.01887-12-311913-05-22 1.00.0 CDOMSTK

Recorded use (last 15 years on record)

In a median year this structure has a recorded diversion of 17 AF. Its most recent year on record, 2019, came in at 19 AF — 112% of that, and 9th 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)
1987 24 12th lowest of 15 · 141% of median 25 0.5
1988 8 3rd lowest of 15 · 47% of median 17 0.2
1995 10 4th lowest of 15 · 59% of median 11 0.5
1996 41 13th lowest of 15 · 241% of median 46 0.5
1997 118 15th lowest of 15 · 694% of median 81 0.8
1999 93 14th lowest of 15 · 547% of median 174 0.8
2000 15 7th lowest of 15 · 88% of median 16 0.5
2008 10 4th lowest of 15 · 59% of median 6 1.0
2010 12 6th lowest of 15 · 71% of median 32 0.2
2011 20 10th lowest of 15 · 118% of median 82 0.1
2013 3 2nd lowest of 15 · 18% of median 13 0.1
2014 17 8th lowest of 15 · 100% of median 70 0.1
2016 22 11th lowest of 15 · 129% of median 41 1.5
2017 1 1st lowest of 15 · 6% of median 6 0.1
2019 19 9th lowest of 15 · 112% of median 61 0.3

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.