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SILVER LAKE DITCH
Structure dossier · WDID 0600603 · DITCH · BOULDER CREEK · DWR record
Where this page's figures come from
Generated 2026-08-27 20:45 by Hydrohistorian. Sources: DWR HydroBase snapshot HydroBase_CO_20260707 (history) + CDSS REST (current), USGS NWIS cross-checks. Engine v0.5.0 (96d5528) — every figure regenerates from this named code version and data image.
Which of its rights get called out?
Not computable for this structure: no administrative call record for this basin.
Where it sits in line
Priority 1888-02-28 — 168th most senior of the 1867 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: MARFELL LAKE NO 2 (1884-04-01). Immediately behind: ISLAND LAKE (1890-07-15).
On MAINSTEM at river mile 7.0, it is 2nd of 78 down the reach. Immediately upstream: BOULDER POWER PL. Immediately downstream: ANDERSON DITCH.
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 (3)
| 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. | Units | UsesWhat the court said this water may be used for -- irrigation, municipal supply, augmentation and so on. | Case |
|---|---|---|---|---|---|---|---|
| 20188.13938 | 1888-02-28 | 1907-03-13 | 10.0 | 0.0 | C | IRR | |
| 20188.16044 | 1893-12-04 | 1907-03-13 | 20.0 | 0.0 | C | STO | |
| 20856.0 | 1907-02-07 | 1909-11-03 | 0.0 | 45.0 | C | STO |
Recorded use (last 15 years on record)
In a median year this structure has a recorded diversion of 691 AF. Its most recent year on record, 2025, came in at 82 AF — 12% of that, and 2nd lowest of the 15 years with a recorded volume.
| Year | Diverted (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 record | Days recorded | Peak (cfs) |
|---|---|---|---|---|
| 2010 | 759 | 11th lowest of 15 · 110% of median | 175 | 3.2 |
| 2011 | 872 | 15th lowest of 15 · 126% of median | 150 | 4.5 |
| 2012 | 440 | 3rd lowest of 15 · 64% of median | 78 | 3.8 |
| 2013 | 687 | 7th lowest of 15 · 99% of median | 111 | 3.7 |
| 2014 | 795 | 14th lowest of 15 · 115% of median | 164 | 3.7 |
| 2015 | 596 | 5th lowest of 15 · 86% of median | 117 | 3.3 |
| 2016 | 769 | 12th lowest of 15 · 111% of median | 127 | 5.0 |
| 2017 | 784 | 13th lowest of 15 · 114% of median | 144 | 3.6 |
| 2018 | 721 | 10th lowest of 15 · 104% of median | 131 | 3.0 |
| 2019 | 691 | 8th lowest of 15 · 100% of median | 126 | 3.8 |
| 2020 | 613 | 6th lowest of 15 · 89% of median | 108 | 7.6 |
| 2021 | 711 | 9th lowest of 15 · 103% of median | 142 | 3.8 |
| 2022 | 584 | 4th lowest of 15 · 84% of median | 108 | 3.8 |
| 2023 | 77 | 1st lowest of 15 · 11% of median | 20 | 3.0 |
| 2025 | 82 | 2nd lowest of 15 · 12% of median | 18 | 3.0 |
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.