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LOWER LATHAM END OF DITCH RETURN

Structure dossier · WDID 0102942 · OTHER · SOUTH PLATTE RIVER · DWR record

Lower Latham End Of Ditch Return is a water structure on South Platte 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 2026-10-15 06:00 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.

Where this structure is measured

GageFlowing nowRecordHow we know
LOWER LATHAM END OF DITCH RETURN LOLRTNCO 18.9 cfs 2018–2026, 2,963 days DWR telemetry mapping
70 RANCH RESERVOIR LOWER LATHAM INLET 70LLINCO 0.0 cfs 2019–2025, 1,244 days co-located, 8 m

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

18.9 cfs as of 2026-10-15 02:30 (3.5 h ago)

Provisional 15-minute telemetry from LOLRTNCO ↗ (LOWER LATHAM END OF DITCH RETURN). 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 8 recorded years it diverts 6,332 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 8 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 6,332 AF. Its most recent year on record, 2025, came in at 9,238 AF — 146% of that, and 7th lowest of the 8 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)
2018 6,469 5th lowest of 8 · 102% of median 6,469 212 40.8
2019 6,194 4th lowest of 8 · 98% of median 6,194 209 32.6
2020 7,479 6th lowest of 8 · 118% of median 7,479 203 27.8
2021 2,052 1st lowest of 8 · 32% of median 2,052 152 15.1
2022 4,476 2nd lowest of 8 · 71% of median 4,476 196 33.2
2023 5,942 3rd lowest of 8 · 94% of median 5,942 365 29.5
2024 17,229 8th lowest of 8 · 272% of median 17,229 366 62.5
2025 9,238 7th lowest of 8 · 146% of median 9,238 304 33.6

How good is our record of it?

Grade B (7/10 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 2007 measured days; currency unknown (no data-coverage date to compare against)
record continuity continuous 100% of the irrigation seasons in 2018-2025 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.

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