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MT PISGAH RESERVOIR

Structure dossier · WDID 1203505 · 3 · FOURMILE CREEK · DWR record

Where this page's figures come from

Generated 2026-08-27 19:51 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 in line

Priority 1907-10-15 — 441st most senior of the 1967 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: EAGLECREST WELL NO 3 (1925-12-31). Immediately behind: ALPHA SPRING (1926-04-17).

Decreed rights (3)

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. UnitsUsesWhat the court said this water may be used for -- irrigation, municipal supply, augmentation and so on.Case
27790.211061907-10-151928-01-13 2743.00.0 AIRRMUNAUG
54317.01998-09-181998-12-31 0.00.0 CIRRCOMINDDOMAUG
62491.02021-02-032021-12-31 0.00.0 CSTOAUG

Recorded use (last 14 years on record)

In a median year this structure has a recorded diversion of 370 AF. Its most recent year on record, 2025, came in at 495 AF — 134% of that, and 10th lowest of the 14 years with a recorded volume.

This structure records both diversions and reservoir releases — they are separate water movements and are accounted separately below.

YearDiverted (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 recordReleased (AF)Days recordedPeak (cfs)
2012 23 1st lowest of 14 · 6% of median — 46 1.0
2013 1,396 13th lowest of 14 · 377% of median — 304 11.1
2014 165 3rd lowest of 14 · 44% of median — 47 2.6
2015 380 8th lowest of 14 · 103% of median — 84 36.5
2016 361 7th lowest of 14 · 97% of median 511 58 7.1
2017 2,151 14th lowest of 14 · 581% of median 5,979 349 8.0
2018 296 5th lowest of 14 · 80% of median 1,005 116 19.2
2019 355 6th lowest of 14 · 96% of median 361 129 11.6
2020 701 12th lowest of 14 · 189% of median 1,140 96 49.2
2021 249 4th lowest of 14 · 67% of median 218 18 37.8
2022 92 2nd lowest of 14 · 25% of median 122 14 16.3
2023 490 9th lowest of 14 · 132% of median 163 63 79.4
2024 564 11th lowest of 14 · 152% of median 1,654 140 44.3
2025 495 10th lowest of 14 · 134% of median 80 88 50.4

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.