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A P R NO 1 DITCH
Structure dossier · WDID 5200508 · 1 · SHEEPHORN CREEK · DWR record
Where this page's figures come from
Generated 2026-08-27 22:16 by Hydrohistorian. Sources: DWR HydroBase snapshot HydroBase_CO_20260707 (history) + CDSS REST (current), USGS NWIS cross-checks. Engine v0.5.0 (2deb1d7) — 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: this structure is not on the modelled flow network, so no reference gage can honestly stand in for it.
Where it sits in line
Priority 1892-06-01 — 56th most senior of the 562 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: CASTLE CREEK DITCH (1892-04-15). Immediately behind: A P R NO 2 DITCH (1892-06-01).
Decreed rights (2)
| 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 |
|---|---|---|---|---|---|---|---|
| 19790.15493 | 1892-06-01 | 1907-01-26 | 0.16 | 0.0 | C | IRR | 57 |
| 46386.44712 | 1972-06-01 | 1977-12-31 | 0.53 | 0.0 | C | IRR |
Legal record & documents
2 decreed actions on record across
2 court cases:
W3336, CA0448.
Every case, dated
| Case | Actions | Latest adjudication | Types |
|---|---|---|---|
W3336 | 1 | 1977-12-31 | S |
CA0448 | 1 | 1907-01-26 | S |
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 65 AF. Its most recent year on record, 2018, came in at 45 AF — 69% of that, and 4th 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) |
|---|---|---|---|---|
| 1993 | 159 | 15th lowest of 15 · 245% of median | 73 | 1.2 |
| 1998 | 120 | 14th lowest of 15 · 185% of median | 122 | 0.5 |
| 2003 | 60 | 5th lowest of 15 · 92% of median | 36 | 0.9 |
| 2004 | 33 | 3rd lowest of 15 · 51% of median | 30 | 0.6 |
| 2005 | 85 | 12th lowest of 15 · 131% of median | 69 | 0.6 |
| 2006 | 88 | 13th lowest of 15 · 135% of median | 65 | 0.7 |
| 2007 | 63 | 6th lowest of 15 · 97% of median | 47 | 0.7 |
| 2008 | 84 | 10th lowest of 15 · 129% of median | 48 | 0.9 |
| 2009 | 66 | 9th lowest of 15 · 102% of median | 38 | 0.9 |
| 2010 | 65 | 7th lowest of 15 · 100% of median | 34 | 1.0 |
| 2011 | 65 | 7th lowest of 15 · 100% of median | 31 | 1.1 |
| 2013 | 30 | 2nd lowest of 15 · 46% of median | 25 | 0.7 |
| 2015 | 5 | 1st lowest of 15 · 8% of median | 24 | 0.1 |
| 2016 | 84 | 10th lowest of 15 · 129% of median | 67 | 0.9 |
| 2018 | 45 | 4th lowest of 15 · 69% of median | 46 | 0.5 |
Trends for this structure
Recorded use is falling over its last 15 recorded years (-4 AF/yr, Mann-Kendall p=0.037).
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
| Check | State | Detail |
|---|---|---|
| identity | complete | name, type, and water source all on file |
| decreed rights | on file | 2 right(s), seniority decoded |
| diversion record | present | 2299 measured days; currency unknown (no data-coverage date to compare against) |
| record continuity | sparse | 24% of the irrigation seasons in 1974-2018 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.