Hydrohistorian
← My Water · Print / save as PDF
LOBACK DITCH
Structure dossier · WDID 3600709 · 1 · BLUE RIVER · DWR record
Where this page's figures come from
Generated 2026-08-27 22:14 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 1930-12-31 — 309th most senior of the 1247 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: CON-HOOSIER - DITCH CLAIM 2 (1929-08-05). Immediately behind: BEAVER HEAD DITCH (1932-05-01).
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 |
|---|---|---|---|---|---|---|---|
| 30184.29584 | 1930-12-31 | 1937-10-26 | 18.33 | 0.0 | C | IRR | 243 |
| 32075.11444 | 1881-05-01 | 1952-03-10 | 3.0 | 0.0 | C | IRR | 254 |
| 32075.18262 | 1899-12-31 | 1952-03-10 | 17.85 | 0.0 | C | IRR | 277 |
| 45290.45144 | 1973-08-07 | 1974-12-31 | 36.62 | 0.0 | C | IRRSTK |
Legal record & documents
4 decreed actions on record across
3 court cases:
W2400, CA1805, CA1709.
Every case, dated
| Case | Actions | Latest adjudication | Types |
|---|---|---|---|
W2400 | 1 | 1974-12-31 | S |
CA1805 | 2 | 1952-03-10 | S |
CA1709 | 1 | 1937-10-26 | 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 6,447 AF. Its most recent year on record, 2024, came in at 5,106 AF — 79% of that, and 2nd 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) |
|---|---|---|---|---|
| 2010 | 6,160 | 7th lowest of 15 · 96% of median | 76 | 62.3 |
| 2011 | 5,834 | 5th lowest of 15 · 90% of median | 70 | 64.2 |
| 2012 | 11,495 | 14th lowest of 15 · 178% of median | 107 | 88.5 |
| 2013 | 8,682 | 10th lowest of 15 · 135% of median | 84 | 65.8 |
| 2014 | 9,583 | 12th lowest of 15 · 149% of median | 102 | 65.0 |
| 2015 | 8,981 | 11th lowest of 15 · 139% of median | 106 | 68.0 |
| 2016 | 7,298 | 9th lowest of 15 · 113% of median | 66 | 120.4 |
| 2017 | 10,492 | 13th lowest of 15 · 163% of median | 105 | 65.0 |
| 2018 | 6,447 | 8th lowest of 15 · 100% of median | 83 | 45.0 |
| 2019 | 5,807 | 4th lowest of 15 · 90% of median | 65 | 62.0 |
| 2020 | 16,437 | 15th lowest of 15 · 255% of median | 163 | 90.0 |
| 2021 | 5,982 | 6th lowest of 15 · 93% of median | 113 | 40.0 |
| 2022 | 3,118 | 1st lowest of 15 · 48% of median | 77 | 40.0 |
| 2023 | 5,792 | 3rd lowest of 15 · 90% of median | 92 | 50.0 |
| 2024 | 5,106 | 2nd lowest of 15 · 79% of median | 117 | 35.0 |
Trends for this structure
Recorded use shows no clear trend over its last 15 recorded years — which is itself worth knowing.
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 | 4 right(s), seniority decoded |
| diversion record | present | 4536 measured days; currency unknown (no data-coverage date to compare against) |
| record continuity | sparse | 36% of the irrigation seasons in 1965-2024 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.