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RIVERSIDE RES

Structure dossier · WDID 0103651 · RESERVOIR · SOUTH PLATTE RIVER · DWR record

Riverside Res is a reservoir 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 2026-10-13 20:03 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DWR’s own records name no owner for a ditch, reservoir or well, so this comes from the source shown and can be out of date.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.

In short

RIVERSIDE RES holds 7 decreed rights on SOUTH PLATTE RIVER. A call at SOUTH PLATTE RIVER COMPACT on SOUTH PLATTE RIVER (1897-06-13), and 1 other currently reaches it: fully called out. 1 further call state no district and sit outside this one, so it is counted here rather than assumed either way. That is today's position; the weeks ahead cannot be projected for it: no administrative call record for this basin. In a median year over its last 15 recorded years it diverts 77,287 acre-feet. It was a party to 11 court cases that also touched 32 other structures.

Assembled from the figures on this page — every number above is checked against them before it is shown (8 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 (storage). Faint dots are the neighbouring water; click any to open it.

Dam safety

Dam RIVERSIDE (completed 1908)
Hazard class High
Condition at last inspection Satisfactory (2025-11-24)
Storage restriction None on file
Normal storage 63,303 AF
Physical status Active
Emergency action plan Yes

Source: DWR Dam Safety’s jurisdictional-dam inventory (damsafety/damsafetydaminfojd), refreshed weekly. Joined on this structure’s own WDID as DWR records it on the dam. Hazard class describes the consequence of failure, not the likelihood of it. DWR’s dam record.

Current administration

● Fully called out — call at SOUTH PLATTE RIVER COMPACT (SOUTH PLATTE RIVER, priority 1897-06-13).

● Fully called out — call at STERLING IRR CO DITCH 1 (SOUTH PLATTE RIVER, priority 1901-02-16).

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 1902-04-01 — 397th most senior of the 7708 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: SNYDER RES (1902-03-20). Immediately behind: HIGHLINE DITCH 5 (1902-10-15).

On MAINSTEM at river mile 116.7, it is 208th of 384 down the reach. Immediately upstream: YOCAM RESERVOIR. Immediately downstream: GREASEWOOD CANAL.

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 (7)

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
19083.00000 1902-04-011914-01-15 16070.0 AF 0.0 — Irrigation, Augmentation +2 CA2142, 07CW0315 +8
21031.00000 1907-08-011914-01-15 41437.0 AF 0.0 — Irrigation, Augmentation +2 04CW0285, 04CW0081 +8
22212.00000 1910-10-251914-01-15 7501.0 AF 0.0 — Irrigation, Augmentation +2 CA2142, CA8492 +9
31423.29219 1929-12-311965-06-08 56325.0 AF 0.0 — Irrigation, Augmentation +2 04CW0285, 04CW0081 +8
50466.00000 1988-03-031988-12-31 3000.0 AF 0.0 — Irrigation, Recharge 88CW0239, 97CW0088 +1
50769.49378 1985-03-111989-12-31 4208.0 AF 1792.0 AF — Storage, Irrigation +6 02CW0081, 89CW0027
51356.00000 1990-08-101990-12-31 3000.0 AF 0.0 — Recreation, Augmentation +3 98CW0416, 90CW0189

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 77,287 AF. Its most recent year on record, 2025, came in at 48,737 AF — 63% of that, and 2nd 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 67,978 7th lowest of 15 · 88% of median 24,416 231 466.0
2012 47,774 1st lowest of 15 · 62% of median 37,909 131 484.0
2013 86,859 11th lowest of 15 · 112% of median 13,246 193 426.0
2014 60,918 4th lowest of 15 · 79% of median 20,832 215 585.5
2015 64,251 5th lowest of 15 · 83% of median 21,999 234 506.1
2016 88,431 13th lowest of 15 · 114% of median 37,823 240 455.8
2017 87,000 12th lowest of 15 · 113% of median 29,577 218 588.0
2018 82,692 9th lowest of 15 · 107% of median 31,871 233 491.1
2019 86,404 10th lowest of 15 · 112% of median 32,609 249 523.0
2020 66,268 6th lowest of 15 · 86% of median 37,224 366 542.0
2021 102,175 14th lowest of 15 · 132% of median 39,558 243 531.0
2022 56,889 3rd lowest of 15 · 74% of median 6,030 365 507.0
2023 132,322 15th lowest of 15 · 171% of median 39,242 362 547.0
2024 77,287 8th lowest of 15 · 100% of median 54,256 193 477.0
2025 48,737 2nd lowest of 15 · 63% of median 31,765 258 559.8

How good is our record of it?

Grade A (10/10 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 7 right(s), seniority decoded
diversion record current 10236 measured days, newest 331 day(s) before the data's end (DWR publishes ~1 year in arrears)
record continuity continuous 87% of the irrigation seasons in 1970-2025 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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