Hydrohistorian

← My Water  ·  Print / save as PDF

BIG GRIZZLY DITCH

Structure dossier · WDID 4700512 · 1 · GRIZZLY CREEK · DWR record

Where this page's figures come from

Generated 2026-08-27 21:07 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 1883-07-01 — 20th most senior of the 1262 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: GOVERNMENT DITCH NO 1 (1883-06-30). Immediately behind: CHEDSEY DITCH 1 (1883-07-01).

Decreed rights (5)

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
12235.01883-07-011892-09-19 0.00.0 CIRR 7
13269.01886-04-301892-09-19 10.00.0 CIRR 25
15919.01893-08-011902-04-23 20.00.0 CIRR 140(126)
43829.399021959-04-011970-12-31 20.00.0 CIRRSTK
56613.559992003-04-272005-12-31 16.650.0 CIRR

Recorded use (last 15 years on record)

In a median year this structure has a recorded diversion of 3,643 AF. Its most recent year on record, 2025, came in at 2,211 AF — 61% of that, and 4th 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)
2008 4,325 10th lowest of 15 · 119% of median 52 64.1
2009 3,679 9th lowest of 15 · 101% of median 62 50.0
2010 5,960 12th lowest of 15 · 164% of median 82 65.0
2012 3,213 7th lowest of 15 · 88% of median 139 20.0
2013 2,845 5th lowest of 15 · 78% of median 63 42.2
2014 3,643 8th lowest of 15 · 100% of median 47 42.2
2015 5,205 11th lowest of 15 · 143% of median 65 47.8
2016 7,240 14th lowest of 15 · 199% of median 61 68.9
2017 575 2nd lowest of 15 · 16% of median 60 5.0
2019 0 1st lowest of 15 · 0% of median 1 0.0
2020 6,404 13th lowest of 15 · 176% of median 61 60.1
2022 2,851 6th lowest of 15 · 78% of median 18 96.7
2023 9,102 15th lowest of 15 · 250% of median 60 94.5
2024 1,690 3rd lowest of 15 · 46% of median 16 56.8
2025 2,211 4th lowest of 15 · 61% of median 92 12.2

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.