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SLY DITCH EXTENSION

Structure dossier · WDID 6000762 · 1 · SAN MIGUEL RIVER · DWR record

Where this page's figures come from

Generated 2026-08-27 22:45 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 1904-12-10 — 855th 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: SAWPIT PIPELINE (1908-07-01). Immediately behind: SPECTACLE DITCH (1922-07-01).

Decreed rights (1)

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. UnitsUsesWhat the court said this water may be used for -- irrigation, municipal supply, augmentation and so on.Case
30604.280531904-12-101939-11-01 2.50.0 CIRR 257, 261

Recorded use (last 15 years on record)

In a median year this structure has a recorded diversion of 114 AF. Its most recent year on record, 2001, came in at 82 AF — 72% of that, and 4th lowest of the 15 years with a recorded volume.

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 recordDays recordedPeak (cfs)
1987 180 11th lowest of 15 · 158% of median 143 0.8
1988 94 5th lowest of 15 · 82% of median 115 0.5
1989 57 1st lowest of 15 · 50% of median 181 0.2
1990 97 6th lowest of 15 · 85% of median 197 0.2
1991 69 2nd lowest of 15 · 60% of median 174 0.2
1992 103 7th lowest of 15 · 90% of median 147 0.5
1993 161 10th lowest of 15 · 141% of median 200 1.0
1994 158 9th lowest of 15 · 139% of median 180 1.2
1995 268 14th lowest of 15 · 235% of median 187 1.0
1996 185 12th lowest of 15 · 162% of median 173 0.8
1997 211 13th lowest of 15 · 185% of median 179 0.8
1998 314 15th lowest of 15 · 275% of median 182 2.0
1999 114 8th lowest of 15 · 100% of median 174 0.4
2000 78 3rd lowest of 15 · 68% of median 178 0.2
2001 82 4th lowest of 15 · 72% of median 184 0.2

How good is our record of it?

Grade A (9/10 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 1 right(s), seniority decoded
diversion record present 4535 measured days; currency unknown (no data-coverage date to compare against)
record continuity continuous 77% 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.