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UPPER MAMM CREEK DITCH

Structure dossier · WDID 4500800 · 1 · MIDDLE MAMM CREEK · DWR record

Where this page's figures come from

Generated 2026-08-27 20:34 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.

Which of its rights get called out?

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 1885-10-20 — 38th most senior of the 1378 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: PORTER DITCH (1885-10-15). Immediately behind: EMANUEL GANT DITCH (1885-10-25).

Decreed rights (1)

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
13077.01885-10-201888-05-05 2.170.0 CIRR 40

Recorded use (last 15 years on record)

In a median year this structure has a recorded diversion of 254 AF. Its most recent year on record, 2008, came in at 205 AF — 81% of that, and 5th 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.

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)
1994 228 6th lowest of 15 · 90% of median — 67 2.2
1995 134 2nd lowest of 15 · 53% of median — 46 2.3
1996 254 8th lowest of 15 · 100% of median — 58 4.1
1997 178 3rd lowest of 15 · 70% of median — 47 3.6
1998 481 11th lowest of 15 · 189% of median — 82 7.8
1999 201 4th lowest of 15 · 79% of median — 55 4.0
2000 276 9th lowest of 15 · 109% of median — 51 5.8
2001 235 7th lowest of 15 · 92% of median — 59 3.6
2002 4 1st lowest of 15 · 2% of median — 25 0.9
2003 313 10th lowest of 15 · 123% of median — 79 4.1
2004 621 13th lowest of 15 · 244% of median — 72 6.8
2005 1,191 15th lowest of 15 · 469% of median — 134 9.4
2006 853 14th lowest of 15 · 336% of median — 108 7.2
2007 597 12th lowest of 15 · 235% of median — 97 5.7
2008 205 5th lowest of 15 · 81% of median — 93 1.1

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.