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ANDERSON DITCH
Structure dossier · WDID 0600501 · DITCH · BOULDER CREEK · DWR record
Where this page's figures come from
Generated 2026-08-27 22:43 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.
Where it sits
Location as DWR records it. Faint dots are the neighbouring water; click any to open it.
Which of its rights are out of priority?
Not computable for this structure: no administrative call record for this basin.
Where it sits in line
Priority 1860-10-01 — 43rd 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: WILLIAM C HAKE DITCH (1860-06-01). Immediately behind: GODDING DAILEY PLUMB D (1861-03-01).
On MAINSTEM at river mile 7.9, it is 3rd of 78 down the reach. Immediately upstream: SILVER LAKE DITCH. Immediately downstream: FARMERS 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 (5)
| 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 |
|---|---|---|---|---|---|---|---|
| 3927.0 | 1860-10-01 | 1882-06-02 | 16.3522 | 0.0 | C | STOIRRAUG | |
| 20890.20031 | 1904-11-04 | 1926-06-21 | 40.0 | 0.0 | C | STO | |
| 26630.0 | 1922-11-29 | 1926-06-21 | 40.0 | 0.0 | C | STO | |
| 29219.0 | 1929-12-31 | 1953-09-28 | 40.0 | 0.0 | C | STO | |
| 31379.0 | 1935-11-30 | 1953-09-28 | 40.0 | 0.0 | C | STO |
Legal record & documents
45 decreed actions on record across
17 court cases:
90CW0108, 79CW0387, 02CW0281, CA12111, CA6672, W7570, W7347, CA8407, CA1269, CA10518 and 7 more below.
Every case, dated
| Case | Actions | Latest adjudication | Types |
|---|---|---|---|
90CW0108 | 14 | 1990-12-31 | O, S |
79CW0387 | 4 | 1985-12-31 | S |
02CW0281 | 4 | 1985-12-31 | S |
CA12111 | 2 | 1953-09-28 | S |
CA6672 | 2 | 1926-06-21 | S |
W7570 | 1 | 1882-06-02 | O |
W7347 | 1 | 1882-06-02 | O |
CA8407 | 1 | 1882-06-02 | O |
CA1269 | 1 | 1882-06-02 | O |
CA10518 | 1 | 1882-06-02 | O |
90CW0193 | 1 | 1882-06-02 | O |
90CW0190 | 2 | 1882-06-02 | O |
85CW0237 | 1 | 1882-06-02 | O |
81CW0466 | 4 | 1882-06-02 | O |
80CW0468 | 4 | 1882-06-02 | O |
79CW0181 | 1 | 1882-06-02 | O |
79CW0180 | 1 | 1882-06-02 | O |
DWR's own records for this structure: net amounts · transactions & adjudication history · scanned decrees (search a case number there for the imaged document). On this site: the district's full legal picture →
Recorded use (last 15 years on record)
In a median year this structure has a recorded diversion of 1,840 AF. Its most recent year on record, 2025, came in at 984 AF — 54% of that, and 3rd 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 | 2,217 | 11th lowest of 15 · 120% of median | 201 | 10.3 |
| 2011 | 2,560 | 14th lowest of 15 · 139% of median | 259 | 11.1 |
| 2012 | 3,000 | 15th lowest of 15 · 163% of median | 295 | 9.9 |
| 2013 | 1,737 | 7th lowest of 15 · 94% of median | 137 | 10.7 |
| 2014 | 2,011 | 9th lowest of 15 · 109% of median | 167 | 8.0 |
| 2015 | 1,456 | 5th lowest of 15 · 79% of median | 157 | 7.6 |
| 2016 | 1,840 | 8th lowest of 15 · 100% of median | 219 | 7.8 |
| 2017 | 2,223 | 12th lowest of 15 · 121% of median | 180 | 11.0 |
| 2018 | 2,026 | 10th lowest of 15 · 110% of median | 193 | 13.6 |
| 2019 | 1,603 | 6th lowest of 15 · 87% of median | 189 | 6.9 |
| 2020 | 101 | 1st lowest of 15 · 6% of median | 17 | 4.6 |
| 2022 | 1,345 | 4th lowest of 15 · 73% of median | 192 | 8.8 |
| 2023 | 897 | 2nd lowest of 15 · 49% of median | 169 | 6.6 |
| 2024 | 2,301 | 13th lowest of 15 · 125% of median | 187 | 446.0 |
| 2025 | 984 | 3rd lowest of 15 · 54% of median | 179 | 3.8 |
Trends for this structure
Recorded use is falling over its last 15 recorded years (-86 AF/yr, Mann-Kendall p=0.038).
Its reference gage, ANDERSON DITCH: no clear flow trend.
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
| Check | State | Detail |
|---|---|---|
| identity | complete | name, type, and water source all on file |
| decreed rights | on file | 5 right(s), seniority decoded |
| diversion record | current | 13536 measured days, newest 285 day(s) before the data's end (DWR publishes ~1 year in arrears) |
| record continuity | continuous | 84% of the irrigation seasons in 1950-2025 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.