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SOUTH LEDGE DITCH
Structure dossier · WDID 0500520 · 1 · SOUTH SAINT VRAIN CREEK · DWR record
Where this page's figures come from
Generated 2026-08-28 00:10 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 1861-03-08 — 13th 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: LONGMONT NORTH PIPELINE (1861-03-08). Immediately behind: LONGMONT SOUTH PIPELINE (1861-03-08).
Decreed rights (22)
| 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 |
|---|---|---|---|---|---|---|---|
| 4085.0 | 1861-03-08 | 1882-06-02 | 0.0 | 0.0 | C | MUNAUGPWRWLDALL | |
| 4462.0 | 1862-03-20 | 1882-06-02 | 0.0 | 0.0 | C | MUNAUGPWRWLDALL | |
| 4488.0 | 1862-04-15 | 1882-06-02 | 0.0 | 0.0 | C | IRRMUNCOMINDRECFISFIRDOMAUGPWR | |
| 4518.0 | 1862-05-15 | 1882-06-02 | 0.0 | 0.0 | C | IRRMUNCOMINDRECFISFIRDOMAUGPWR | |
| 4657.0 | 1862-10-01 | 1882-06-02 | 0.0 | 0.0 | C | IRRMUNCOMINDRECFISFIRDOMAUGPWR | |
| 4853.0 | 1863-04-15 | 1882-06-02 | 0.0 | 0.0 | C | IRRMUNCOMINDRECFISFIRDOMAUGPWR | |
| 4883.0 | 1863-05-15 | 1882-06-02 | 0.0 | 0.0 | C | MUNAUGPWRWLDALL | |
| 5295.0 | 1864-06-30 | 1882-06-02 | 0.0 | 0.0 | C | MUNAUGPWRWLDALL | |
| 5600.0 | 1865-05-01 | 1882-06-02 | 0.0 | 0.0 | C | MUNAUGPWRWLDALL | |
| 5631.0 | 1865-06-01 | 1882-06-02 | 0.0 | 0.0 | C | MUNAUGPWRWLDALL | |
| 5996.0 | 1866-06-01 | 1882-06-02 | 0.0 | 0.0 | C | MUNAUGPWRWLDALL | |
| 7012.0 | 1869-03-13 | 1882-06-02 | 0.0 | 0.0 | C | MUNAUGPWRWLDALL | |
| 7640.0 | 1870-12-01 | 1882-06-02 | 0.0 | 0.0 | C | MUNAUGPWRWLDALL | |
| 7822.0 | 1871-06-01 | 1883-02-21 | 0.0 | 0.0 | C | STO | |
| 8464.0 | 1873-03-04 | 1882-06-02 | 0.0 | 0.0 | C | MUNAUGPWRWLDALL | |
| 8553.0 | 1873-06-01 | 1882-06-02 | 0.0 | 0.0 | C | MUNAUGPWRWLDALL | |
| 11841.07579 | 1870-10-01 | 1907-03-13 | 3.7 | 0.0 | C | IRR | |
| 12677.0 | 1884-09-15 | 1907-03-13 | 27.3 | 0.0 | C | IRR | |
| 19271.0 | 1902-10-06 | 1907-03-13 | 0.0 | 0.0 | C | STO | |
| 19273.0 | 1902-10-08 | 1907-03-13 | 0.0 | 0.0 | C | MUNALL | |
| 20890.19756 | 1904-02-03 | 1926-06-01 | 0.0 | 0.0 | C | STO | |
| 29219.0 | 1929-12-31 | 1951-07-23 | 0.0 | 0.0 | C | MUNALL |
Legal record & documents
22 decreed actions on record across
14 court cases:
87CW0253, 87CW0231, CA4790, 87CW0222, 87CW0221, 87CW0220, 87CW0219, 87CW0218, 87CW0216, 87CW0215 and 4 more below.
Every case, dated
| Case | Actions | Latest adjudication | Types |
|---|---|---|---|
87CW0253 | 2 | 1951-07-23 | S |
87CW0231 | 2 | 1926-06-01 | O, S |
CA4790 | 2 | 1907-03-13 | S |
87CW0222 | 1 | 1907-03-13 | S |
87CW0221 | 1 | 1882-06-02 | O |
87CW0220 | 1 | 1882-06-02 | O |
87CW0219 | 1 | 1882-06-02 | O |
87CW0218 | 1 | 1882-06-02 | O |
87CW0216 | 1 | 1882-06-02 | O |
87CW0215 | 1 | 1882-06-02 | O |
87CW0214 | 2 | 1882-06-02 | O |
87CW0213 | 2 | 1882-06-02 | O |
87CW0212 | 1 | 1882-06-02 | O |
01CW0188 | 4 | 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 155 AF. Its most recent year on record, 2024, came in at 50 AF — 32% 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) |
|---|---|---|---|---|
| 2005 | 1,245 | 15th lowest of 15 · 803% of median | 95 | 13.0 |
| 2006 | 373 | 9th lowest of 15 · 241% of median | 32 | 10.0 |
| 2007 | 686 | 11th lowest of 15 · 443% of median | 44 | 13.5 |
| 2008 | 698 | 12th lowest of 15 · 450% of median | 54 | 12.6 |
| 2009 | 746 | 13th lowest of 15 · 481% of median | 67 | 11.0 |
| 2010 | 482 | 10th lowest of 15 · 311% of median | 34 | 12.4 |
| 2011 | 1,091 | 14th lowest of 15 · 704% of median | 55 | 18.6 |
| 2017 | 155 | 8th lowest of 15 · 100% of median | 22 | 5.9 |
| 2018 | 50 | 3rd lowest of 15 · 32% of median | 14 | 5.4 |
| 2019 | 96 | 6th lowest of 15 · 62% of median | 96 | 1.5 |
| 2020 | 82 | 5th lowest of 15 · 53% of median | 50 | 2.8 |
| 2021 | 9 | 1st lowest of 15 · 6% of median | 21 | 1.0 |
| 2022 | 144 | 7th lowest of 15 · 93% of median | 50 | 3.7 |
| 2023 | 48 | 2nd lowest of 15 · 31% of median | 37 | 1.5 |
| 2024 | 50 | 3rd lowest of 15 · 32% of median | 67 | 2.9 |
Trends for this structure
Recorded use is falling over its last 15 recorded years (-40 AF/yr, Mann-Kendall p=0.003).
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 | 22 right(s), seniority decoded |
| diversion record | present | 4964 measured days; currency unknown (no data-coverage date to compare against) |
| record continuity | sparse | 33% of the irrigation seasons in 1954-2024 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.