Hydrohistorian
Log in

← My Water  ·  All reservoirs in this district  ·  Print / save as PDF  · 

 ·  every download of this record carries its certificate id

GREELEY FLATIRON RESERVOIR 1-5

Structure dossier · WDID 0303791 · RESERVOIR · CACHE LA POUDRE RIVER · DWR record

Greeley Flatiron Reservoir 1-5 is a reservoir on Cache La Poudre River in Colorado. This page is its public record: the water it has a right to, whether it may take it today, and its history, compiled from the Colorado Division of Water Resources.

Source DWR administrative record · verify at DWR structure ↗ Source DWR administrative record · verify at DWR diversion records ↗ Source Our computation, scored against a reference · scored against DWR's call analysis, see /methods

Where this page's figures come from

Generated 2026-10-14 01:01 by Hydrohistorian. Sources: DWR HydroBase snapshot HydroBase_CO_20260928 (history) + CDSS REST (current), USGS NWIS cross-checks. Engine v0.5.0 (dd58e60) — every figure regenerates from this named code version and data image.

The record and the river

Download this structure

Everything on this page as data you can work with — and a README that makes it citable: the HydroBase snapshot it was built from, the build commit, what every column means, the method behind each derived figure, and that method's stated limits.

⇩ Full record (.zip) Print / save as PDF

Or one table at a time: rights.csv · annual_use.csv · curtailment_now.csv · court_cases.csv · co_parties.csv · call_climatology.csv

What is in the bundle
  • rights.csv — every decreed right, most senior first, with admin numbers, dates, amounts, uses and case numbers.
  • annual_use.csv — recorded diversion by year, with releases accounted separately.
  • curtailment_now.csv — each right's current priority status and how often it was out across analog years.
  • court_cases.csv — the cases attached to its rights.
  • co_parties.csv — the other structures that were parties to those cases. Not available anywhere else.
  • call_climatology.csv — how often each right has been out of priority by week of season, with confidence intervals and the seasons the record could actually judge.
  • README.txt — provenance, methods, limits, disclaimer, and links back to DWR's own records for verification.

Where it sits

Location as DWR records it (storage). Faint dots are the neighbouring water; click any to open it.

Current administration

● Fully called out — call at OGILVY DITCH (CACHE LA POUDRE RIVER, priority 1884-04-10).

Which of its rights are out of priority?

The outlook for the weeks ahead is not computable for this structure: no administrative call record for this basin. Today’s position is a separate question, and it is answered in Current administration above — that screen reads the district’s active calls and needs no reference gage.

Where it sits in line

Priority 1999-12-30 — 2742nd most senior of the 2964 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: GREELEY IMPACT REACH B (1999-12-30). Immediately behind: GREELEY E 8TH STREET RESERVOIR (1999-12-30).

On MAINSTEM at river mile 153.8, it is 749th of 818 down the reach. Immediately upstream: STAR RESERVOIR DIVERSION NO 2. Immediately downstream: GREELEY 35TH AVE DRAINAGE DITCH DIVERSIO.

Position on the modelled network, not a claim about whose water this is — a stream carries water from many rights at once, and diverted water returns to it.

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. Alt-pointAn absolute amount decreed at another structure that may be diverted here instead -- an alternate point of diversion or an exchange. DWR calls this the APEX amount; a right showing 0.0 absolute but an alt-point amount is exercised here under another structure's decree. Decreed forWhat the court said this water may be used for -- irrigation, municipal supply, augmentation and so on.Case
54785.00000 1999-12-301999-12-31 1458.6 AF 4793.4 AF — Municipal, All beneficial uses 15CW3099, 22CW3220 +1

Amounts marked cfs are flow rates; AF are stored volumes (storage rights are decreed in acre-feet). An absolute amount of 0.0 beside an alt-point amount is not a dead right: the water is decreed at another structure, and that row records permission to divert it here instead (an alternate point or exchange). A case listing several numbers reflects the original decree plus later change cases.

Recorded use (last 15 years on record)

Years far under the decreed amount? That gap has a name — paper water vs. wet water, explained on this structure.

In a median year this structure has a recorded diversion of 573 AF. Its most recent year on record, 2025, came in at 0 AF — 0% of that, and 1st lowest of the 15 years with a recorded volume.

This structure records both diversions and reservoir releases — they are separate water movements and are accounted separately below.

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 recordReleased (AF)Days recordedPeak (cfs)
2011 1,187 13th lowest of 15 · 207% of median 78 304 15.4
2012 446 6th lowest of 15 · 78% of median 920 99 4.9
2013 1,228 14th lowest of 15 · 214% of median 876 135 122.0
2014 471 7th lowest of 15 · 82% of median — 43 24.3
2015 1,007 11th lowest of 15 · 176% of median — 91 47.8
2016 1,466 15th lowest of 15 · 256% of median — 144 12.8
2017 1,045 12th lowest of 15 · 182% of median — 84 23.8
2018 257 2nd lowest of 15 · 45% of median 135 16 11.8
2019 732 9th lowest of 15 · 128% of median 233 58 14.4
2020 573 8th lowest of 15 · 100% of median 1,153 60 14.4
2021 266 3rd lowest of 15 · 46% of median — 18 12.3
2022 266 3rd lowest of 15 · 46% of median — 18 12.3
2023 419 5th lowest of 15 · 73% of median — 41 11.7
2024 749 10th lowest of 15 · 131% of median — 101 16.1
2025 0 1st lowest of 15 · 0% of median — 77 0.0

How good is our record of it?

Grade B (8/10 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 stale 2009 measured days, but newest is 467 day(s) before the data's end (target 450)
record continuity patchy 48% of the irrigation seasons in 2005-2025 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.

Hydrohistorian is free, with no ads — one server and a lot of public records. If it earns its keep, you can help keep it running.