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MIDDLE FORK SOUTH PLATTE AT SANTA MARIA
Structure dossier · WDID 2302902 · STREAM GAGE · MIDDLE FORK SOUTH PLATTE 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 (0576005) — 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.
Current administration
● Fully called out — call at LAST CHANCE DITCH 2 (SOUTH PLATTE RIVER, priority 1863-12-30).
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 1867-07-01 — 228th most senior of the 21881 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: 2302431 (1867-07-01). Immediately behind: 2302924 (1867-07-01).
Decreed rights (8)
| 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 |
|---|---|---|---|---|---|---|---|
| 6391.0 | 1867-07-01 | 1889-10-18 | 4.1 | 0.0 | C | IRRMUNCOMINDRECFISDOM | |
| 6405.0 | 1867-07-15 | 1889-10-18 | 7.6 | 0.0 | C | IRRMUNCOMINDRECFISDOM | |
| 9241.0 | 1875-04-20 | 1889-10-18 | 1.2 | 0.0 | C | IRRMUNCOMINDRECFISDOM | |
| 10337.0 | 1878-04-20 | 1889-10-18 | 1.0 | 0.0 | C | IRRMUNCOMINDRECFISDOM | |
| 11415.0 | 1881-04-02 | 1889-10-18 | 9.14 | 0.0 | C | IRRMUNCOMINDRECFISFIRDOMAUGOTH | |
| 23152.15493 | 1892-06-01 | 1918-05-18 | 1.13 | 0.0 | C | IRRMUNCOMINDRECFISFIRDOMAUGOTH | |
| 23152.15585 | 1892-09-01 | 1918-05-18 | 0.5 | 0.0 | C | IRRMUNCOMINDRECFISFIRDOMAUGOTH | |
| 23152.15645 | 1892-10-31 | 1918-05-18 | 0.33 | 0.0 | C | IRRMUNCOMINDRECFISFIRDOMAUGOTH |
Legal record & documents
14 decreed actions on record across
2 court cases:
W9234, W8345.
Every case, dated
| Case | Actions | Latest adjudication | Types |
|---|---|---|---|
W9234 | 8 | 1918-05-18 | O, S |
W8345 | 6 | 1889-10-18 | 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 2,503 AF. Its most recent year on record, 2025, came in at 2,437 AF — 97% of that, and 6th 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) |
|---|---|---|---|---|---|
| 2011 | 2,229 | 3rd lowest of 15 · 89% of median | 2,229 | 90 | 20.2 |
| 2012 | 1,195 | 1st lowest of 15 · 48% of median | 1,195 | 63 | 12.0 |
| 2013 | 2,499 | 7th lowest of 15 · 100% of median | 2,499 | 93 | 20.3 |
| 2014 | 2,861 | 14th lowest of 15 · 114% of median | 2,861 | 93 | 21.6 |
| 2015 | 3,043 | 15th lowest of 15 · 122% of median | 3,043 | 93 | 21.6 |
| 2016 | 2,503 | 8th lowest of 15 · 100% of median | 2,503 | 93 | 21.6 |
| 2017 | 2,747 | 13th lowest of 15 · 110% of median | 2,747 | 93 | 20.3 |
| 2018 | 2,293 | 4th lowest of 15 · 92% of median | 2,293 | 93 | 20.3 |
| 2019 | 2,325 | 5th lowest of 15 · 93% of median | 2,325 | 90 | 21.6 |
| 2020 | 2,002 | 2nd lowest of 15 · 80% of median | 2,002 | 93 | 20.3 |
| 2021 | 2,535 | 10th lowest of 15 · 101% of median | 2,535 | 93 | 20.3 |
| 2022 | 2,535 | 10th lowest of 15 · 101% of median | 2,535 | 93 | 20.3 |
| 2023 | 2,579 | 12th lowest of 15 · 103% of median | 2,579 | 83 | 21.6 |
| 2024 | 2,512 | 9th lowest of 15 · 100% of median | 2,512 | 93 | 21.6 |
| 2025 | 2,437 | 6th lowest of 15 · 97% of median | 2,437 | 93 | 20.3 |
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 | 8 right(s), seniority decoded |
| diversion record | present | 2981 measured days; currency unknown (no data-coverage date to compare against) |
| record continuity | sparse | 34% of the irrigation seasons in 1984-2025 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.