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PORTER DITCH
Structure dossier · WDID 3100583 · 1 · LOS PINOS RIVER · DWR record
Where this page's figures come from
Generated 2026-08-27 22:50 by Hydrohistorian. Sources: DWR HydroBase snapshot HydroBase_CO_20260707 (history) + CDSS REST (current), USGS NWIS cross-checks. Engine v0.5.0 (a1c9146) — 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 1936-06-15 — 365th most senior of the 1037 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: VALLECITO RES (INDIAN) (1935-11-13). Immediately behind: SHELHAMER LOWER END D #2 (1939-04-10).
Decreed rights (2)
| 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 |
|---|---|---|---|---|---|---|---|
| 31577.0 | 1936-06-15 | 1966-03-07 | 40.0 | 0.0 | C | PWR | 65-18 |
| 36659.0 | 1950-05-15 | 1966-03-07 | 8.0 | 0.0 | C | IRR | 65-28 |
Legal record & documents
2 decreed actions on record across
1 court case:
CA1248-B.
Every case, dated
| Case | Actions | Latest adjudication | Types |
|---|---|---|---|
CA1248-B | 2 | 1966-03-07 | 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 211 AF. Its most recent year on record, 2017, came in at 190 AF — 90% of that, and 7th 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) |
|---|---|---|---|---|---|
| 2003 | 0 | 1st lowest of 15 · 0% of median | — | 14 | 0.0 |
| 2004 | 401 | 14th lowest of 15 · 190% of median | — | 64 | 5.4 |
| 2005 | 364 | 13th lowest of 15 · 172% of median | — | 117 | 3.0 |
| 2006 | 52 | 3rd lowest of 15 · 25% of median | — | 29 | 4.2 |
| 2007 | 333 | 12th lowest of 15 · 158% of median | — | 97 | 6.8 |
| 2008 | 440 | 15th lowest of 15 · 208% of median | — | 115 | 3.7 |
| 2009 | 116 | 5th lowest of 15 · 55% of median | — | 37 | 2.4 |
| 2010 | 211 | 8th lowest of 15 · 100% of median | — | 44 | 2.9 |
| 2011 | 156 | 6th lowest of 15 · 74% of median | — | 40 | 3.2 |
| 2012 | 257 | 9th lowest of 15 · 122% of median | — | 43 | 5.1 |
| 2013 | 109 | 4th lowest of 15 · 52% of median | — | 20 | 5.7 |
| 2014 | 304 | 10th lowest of 15 · 144% of median | — | 48 | 4.6 |
| 2015 | 0 | 1st lowest of 15 · 0% of median | — | 11 | 0.0 |
| 2016 | 306 | 11th lowest of 15 · 145% of median | — | 56 | 5.7 |
| 2017 | 190 | 7th lowest of 15 · 90% of median | — | 35 | 4.0 |
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 | 2 right(s), seniority decoded |
| diversion record | present | 3290 measured days; currency unknown (no data-coverage date to compare against) |
| record continuity | sparse | 23% of the irrigation seasons in 1951-2017 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.