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LYONS PIPELINE
Structure dossier · WDID 0500512 · 7 · NORTH SAINT VRAIN CREEK · DWR record
Where this page's figures come from
Generated 2026-08-28 02:38 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 1892-07-06 — 187th most senior of the 1289 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: BEAVER PARK RES (1892-06-30). Immediately behind: LONGMONT LYONS PL (1892-07-06).
Decreed rights (4)
| 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 |
|---|---|---|---|---|---|---|---|
| 15528.0 | 1892-07-06 | 1907-03-13 | 0.5 | 0.0 | C | DOM | |
| 37093.15528 | 1892-07-06 | 1971-02-25 | 1.0 | 0.0 | C | MUNDOM | |
| 37093.21953 | 1910-02-08 | 1971-02-25 | 2.0 | 0.0 | C | IRRMUNCOMINDFIRDOMAUGOTH | |
| 42907.0 | 1967-06-23 | 1971-02-25 | 0.54 | 0.0 | C | IRRMUNCOMINDFIRDOMAUGOTH |
Legal record & documents
8 decreed actions on record across
4 court cases:
83CW0374, CA20716, 89CW0159, CA4853.
Every case, dated
| Case | Actions | Latest adjudication | Types |
|---|---|---|---|
83CW0374 | 1 | 1983-12-31 | S |
CA20716 | 4 | 1971-02-25 | S |
89CW0159 | 2 | 1971-02-25 | S |
CA4853 | 1 | 1907-03-13 | 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 350 AF. Its most recent year on record, 2011, came in at 120 AF — 34% of that, and 2nd lowest of the 15 years with a recorded volume.
This structure records both diversions and reservoir releases — they are separate water movements and are accounted separately below.
| 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 | Released (AF) | Days recorded | Peak (cfs) |
|---|---|---|---|---|---|
| 1993 | 342 | 7th lowest of 15 · 98% of median | — | 365 | 1.5 |
| 1994 | 368 | 9th lowest of 15 · 105% of median | — | 365 | 2.2 |
| 1995 | 412 | 12th lowest of 15 · 118% of median | — | 365 | 2.9 |
| 1996 | 414 | 13th lowest of 15 · 118% of median | — | 366 | 1.9 |
| 1997 | 368 | 9th lowest of 15 · 105% of median | — | 364 | 1.5 |
| 1998 | 460 | 14th lowest of 15 · 131% of median | — | 365 | 1.8 |
| 1999 | 489 | 15th lowest of 15 · 140% of median | — | 363 | 2.5 |
| 2000 | 350 | 8th lowest of 15 · 100% of median | — | 363 | 2.9 |
| 2001 | 402 | 11th lowest of 15 · 115% of median | — | 365 | 1.9 |
| 2002 | 306 | 6th lowest of 15 · 87% of median | — | 365 | 3.6 |
| 2003 | 257 | 3rd lowest of 15 · 73% of median | — | 364 | 2.1 |
| 2004 | 262 | 4th lowest of 15 · 75% of median | — | 360 | 3.2 |
| 2005 | 262 | 4th lowest of 15 · 75% of median | — | 302 | 2.4 |
| 2010 | 43 | 1st lowest of 15 · 12% of median | — | 43 | 0.5 |
| 2011 | 120 | 2nd lowest of 15 · 34% of median | — | 123 | 0.5 |
Trends for this structure
Recorded use is falling over its last 15 recorded years (-17 AF/yr, Mann-Kendall p=0.013).
How good is our record of it?
Grade B (8/10 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 | 4 right(s), seniority decoded |
| diversion record | present | 6665 measured days; currency unknown (no data-coverage date to compare against) |
| record continuity | patchy | 69% of the irrigation seasons in 1966-2011 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.