Hydrohistorian
← My Water · Print / save as PDF
WILLIAM ROSS DITCH
Structure dossier · WDID 6000800 · 1 · FALL CREEK · DWR record
Where this page's figures come from
Generated 2026-08-27 23:21 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 1907-07-18 — 821st most senior of the 2893 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: LYMAN GRAY W&S (1904-12-10). Immediately behind: GOLD KING PIPELINE (1908-06-01).
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 |
|---|---|---|---|---|---|---|---|
| 30604.21017 | 1907-07-18 | 1939-11-01 | 3.2 | 0.0 | C | IRR | 262 |
| 32312.0 | 1938-06-20 | 1939-11-01 | 2.8 | 0.0 | C | IRR | 362 |
Legal record & documents
2 decreed actions on record across
1 court case:
CA4641.
Every case, dated
| Case | Actions | Latest adjudication | Types |
|---|---|---|---|
CA4641 | 2 | 1939-11-01 | 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 242 AF. Its most recent year on record, 2001, came in at 242 AF — 100% of that, and 8th 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) |
|---|---|---|---|---|
| 1987 | 75 | 2nd lowest of 15 · 31% of median | 77 | 0.5 |
| 1988 | 120 | 4th lowest of 15 · 50% of median | 87 | 1.0 |
| 1989 | 56 | 1st lowest of 15 · 23% of median | 30 | 1.0 |
| 1990 | 291 | 9th lowest of 15 · 120% of median | 167 | 1.0 |
| 1991 | 377 | 10th lowest of 15 · 156% of median | 178 | 3.0 |
| 1992 | 177 | 6th lowest of 15 · 73% of median | 141 | 1.0 |
| 1993 | 133 | 5th lowest of 15 · 55% of median | 147 | 1.0 |
| 1994 | 105 | 3rd lowest of 15 · 43% of median | 82 | 1.0 |
| 1995 | 529 | 14th lowest of 15 · 219% of median | 136 | 3.0 |
| 1996 | 410 | 11th lowest of 15 · 169% of median | 152 | 2.8 |
| 1997 | 610 | 15th lowest of 15 · 252% of median | 154 | 3.2 |
| 1998 | 434 | 12th lowest of 15 · 179% of median | 105 | 3.0 |
| 1999 | 453 | 13th lowest of 15 · 187% of median | 115 | 3.0 |
| 2000 | 234 | 7th lowest of 15 · 97% of median | 61 | 2.2 |
| 2001 | 242 | 8th lowest of 15 · 100% of median | 57 | 2.5 |
Trends for this structure
Recorded use is rising over its last 15 recorded years (+18 AF/yr, Mann-Kendall p=0.038).
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 | 1774 measured days; currency unknown (no data-coverage date to compare against) |
| record continuity | sparse | 31% of the irrigation seasons in 1974-2001 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.