Hydrohistorian
Log in

← My Water  ·  Print / save as PDF  · 

 ·  every download of this record carries its certificate id

GRAND RIVER DITCH RELEASE STRUCTURE

Structure dossier · WDID 0304601 · OTHER · LA POUDRE PASS CREEK · DWR record

Grand River Ditch Release Structure is a water structure on La Poudre Pass Creek 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 2026-10-16 23:35 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.

Who owns it

DWR’s own records name no owner for a ditch, reservoir or well, so this comes from the source shown and can be out of date. Organisations only: a private landowner’s name is never listed.

The record and the river

This is water crossing the divide

Grand River Ditch Release Structure is the receiving end of the Grand River Ditch (ditch). It takes water from Colorado River headwaters at La Poudre Pass (Div 5) and delivers it to Cache la Poudre River via Long Draw (Div 1). Water arriving here is an import: it was never in this basin’s own runoff.

The other end: Grand River Ditch 5104601, Grand River Ditch North Feeder 5101212, Grand River Ditch South Feeder 5101213

Metered as a facility: GRNDRDCO — the record for the crossing itself, which may run longer than the record for either structure.

Owner / operator: Water Supply & Storage Co.

From the site’s hand-curated register of transbasin facilities. Every crossing on one page →

Where this structure is measured

GageFlowing nowRecordHow we know
GRAND RIVER DITCH AT LA POUDRE PASS GRNDRDCO 2.01 cfs 1929–2026, 37,015 days DWR telemetry mapping

A green link is DWR's own: either its telemetry inventory maps this WDID to that station, or the station is named for this WDID (0700553 → 0700553A). An amber one is ours — the station sits within 250 m and shares a distinctive word with this structure's name, which is a strong hint rather than a DWR statement that this gage meters this structure. Wrong? Tell us.

Flowing now

2.01 cfs as of 2026-10-16 20:45 (2.8 h ago)

Provisional 15-minute telemetry from GRNDRDCO ↗ (GRAND RIVER DITCH AT LA POUDRE PASS). Raw, not the approved record — it is never merged into the diversion history below. DWR publishes the official diversion record after the water year closes and is approved, which is why that record ends months back while this reads minutes ago.

In short

In a median year over its last 15 recorded years it diverts 16,508 acre-feet.

Assembled from the figures on this page — every number above is checked against them before it is shown (2 checked). The detail, with its method, is in the cards below.

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 (other). Faint dots are the neighbouring water; click any to open it.

Which of its rights are out of priority?

The outlook for the weeks ahead is not computable for this structure: no decreed right on file, so there is no priority to test.

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 16,508 AF. Its most recent year on record, 2025, came in at 18,767 AF — 114% of that, and 13th 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 17,002 9th lowest of 15 · 103% of median 17,002 113 202.0
2012 9,834 1st lowest of 15 · 60% of median 9,834 161 128.0
2013 17,885 10th lowest of 15 · 108% of median 17,885 148 272.0
2014 16,508 8th lowest of 15 · 100% of median 16,508 158 202.0
2015 12,127 2nd lowest of 15 · 74% of median 12,127 168 192.0
2016 14,115 4th lowest of 15 · 86% of median 14,115 163 225.0
2017 15,892 7th lowest of 15 · 96% of median 15,892 159 222.0
2018 14,437 5th lowest of 15 · 88% of median 14,437 132 217.0
2019 19,528 15th lowest of 15 · 118% of median 19,528 154 229.0
2020 18,069 11th lowest of 15 · 110% of median 18,069 105 289.0
2021 12,737 3rd lowest of 15 · 77% of median 12,737 126 196.0
2022 19,526 14th lowest of 15 · 118% of median 19,526 144 251.0
2023 15,230 6th lowest of 15 · 92% of median 15,230 137 177.0
2024 18,200 12th lowest of 15 · 110% of median 18,200 162 246.0
2025 18,767 13th lowest of 15 · 114% of median 18,767 164 239.0

How good is our record of it?

Grade C (5/10 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 absent no water rights cached for this WDID
diversion record present 2194 measured days; currency unknown (no data-coverage date to compare against)
record continuity sparse 26% of the irrigation seasons in 1986-2025 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.