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GROSS RES
Structure dossier · WDID 0604199 · RESERVOIR · SOUTH BOULDER CREEK · DWR record
Where this page's figures come from
Generated 2026-08-28 01:50 by Hydrohistorian. Sources: DWR HydroBase snapshot HydroBase_CO_20260707 (history) + CDSS REST (current), USGS NWIS cross-checks. Engine v0.5.0 (5cd37f7) — 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
● Junior rights called out — call at RURAL DITCH (BOULDER CREEK, priority 1862-05-09).
● Junior rights called out — call at JONES DONNELLY DITCH (SOUTH BOULDER CREEK, priority 1860-04-30).
● Junior rights called out — call at HOWARD DITCH (SOUTH BOULDER CREEK, priority 1860-04-01).
● Junior rights called out — call at LOWER LATHAM DITCH (SOUTH PLATTE RIVER, priority 1885-11-20).
Which of its rights are out of priority?
Not computable for this structure: no gage record for this year at this date, so there is nothing to find analogs for.
Where it sits in line
Priority 1859-10-01 — 18th most senior of the 1867 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: 0602415 (1859-10-01). Immediately behind: SMITH GOSS DITCH (1859-11-15).
On SOUTH BOULDER CREEK at river mile 1.2, it is 5th of 58 down the reach. Immediately upstream: LAKE PACTOLUS. Immediately downstream: DENVER POWER CONDUIT 1.
Position on the modelled network, not a claim about whose water this is — a stream carries water from many rights at once, and diverted water returns to it.
Decreed rights (26)
| 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 |
|---|---|---|---|---|---|---|---|
| 3561.0 | 1859-10-01 | 1882-06-02 | 0.0 | 0.0 | C | IRRMUNCOMINDRECFISDOMAUGWLD | |
| 4869.0 | 1863-05-01 | 1882-06-02 | 0.0 | 0.0 | C | IRRMUNCOMINDRECFISDOMAUGOTHWLD | |
| 5511.0 | 1865-02-01 | 1882-06-02 | 0.0 | 0.0 | C | IRRMUNCOMINDRECFISDOMAUGOTHWLD | |
| 5570.0 | 1865-04-01 | 1882-06-02 | 0.0 | 0.0 | C | IRRMUNCOMINDRECFISDOMSTKOTHWLD | |
| 5935.0 | 1866-04-01 | 1882-06-02 | 0.0 | 0.0 | C | IRRMUNCOMINDRECFISDOMSTKOTHWLD | |
| 5979.0 | 1866-05-15 | 1882-06-02 | 0.0 | 0.0 | C | IRRMUNCOMINDRECFISDOMAUGOTHWLD | |
| 5996.0 | 1866-06-01 | 1882-06-02 | 0.0 | 0.0 | C | IRRMUNCOMINDRECFISDOMAUGOTHWLD | |
| 7457.0 | 1870-06-01 | 1882-06-02 | 0.0 | 0.0 | C | IRRMUNCOMINDRECFISDOMAUGWLD | |
| 7579.0 | 1870-10-01 | 1882-06-02 | 0.0 | 0.0 | C | IRRMUNCOMINDRECFISDOMSTKOTHWLD | |
| 8141.0 | 1872-04-15 | 1882-06-02 | 0.0 | 0.0 | A | IRRMUNRECFISDOMOTHWLD | |
| 8553.0 | 1873-06-01 | 1882-06-02 | 0.0 | 0.0 | A | IRRMUNRECFISDOMOTHWLD | |
| 11567.0 | 1881-09-01 | 1907-03-13 | 0.0 | 0.0 | A | IRRMUNRECFISDOMWLD | |
| 12724.0 | 1884-11-01 | 1907-03-13 | 0.0 | 0.0 | A | IRRMUNRECFISDOMWLD | |
| 15386.0 | 1892-02-15 | 1907-03-13 | 0.0 | 0.0 | A | IRRMUNRECFISDOMWLD | |
| 17441.0 | 1897-10-01 | 1907-03-13 | 0.0 | 0.0 | A | IRRMUNRECFISDOMWLD | |
| 20890.20624 | 1906-06-20 | 1907-11-03 | 0.0 | 0.0 | A | IRRMUNRECFISDOMWLD | |
| 27930.23981 | 1915-08-29 | 1953-09-28 | 0.0 | 0.0 | A | IRRMUNRECFISDOMWLD | |
| 34828.0 | 1945-05-10 | 1953-09-28 | 41811.0 | 71267.0 | A | STOIRRMUNCOMINDRECFISFIRDOMOTH | |
| 47847.0 | 1980-12-31 | 1980-12-31 | 0.0 | 0.0 | C | IRRMUNCOMRECFISDOMAUGWLD | |
| 49669.0 | 1985-12-27 | 1985-12-31 | 0.0 | 0.0 | C | IRRMUNCOMRECFISDOMAUGOTHWLD | |
| 51269.0 | 1990-05-15 | 1990-12-31 | 0.0 | 0.0 | C | IRRMUNCOMINDRECFISDOMAUGWLD | |
| 53872.0 | 1997-06-30 | 1997-12-31 | 0.0 | 0.0 | C | IRRMUNCOMINDRECFISDOMAUGWLD | |
| 58825.0 | 2011-01-21 | 2011-12-31 | 0.0 | 0.0 | C | IRRMUNCOMINDRECFISDOMAUGWLD | |
| 60963.0 | 2016-11-28 | 2016-12-31 | 0.0 | 0.0 | C | MUN | |
| 60996.58494 | 2010-02-24 | 2017-12-31 | 0.0 | 5000.0 | A | MUNMIN | |
| 60996.58736 | 2010-10-24 | 2017-12-31 | 0.0 | 0.0 | C | MUN |
Legal record & documents
50 decreed actions on record across
14 court cases:
17CW3212, 16CW3160, 05CW0295, 97CW0195, 90CW0108, 93CW0025, 79CW0387, CA12111, 86CW0142, 85CW0119 and 4 more below.
Every case, dated
| Case | Actions | Latest adjudication | Types |
|---|---|---|---|
17CW3212 | 1 | 2017-12-31 | S |
16CW3160 | 2 | 2017-12-31 | S |
05CW0295 | 4 | 2011-12-31 | O, S |
97CW0195 | 3 | 1997-12-31 | O, S |
90CW0108 | 7 | 1990-12-31 | O, S |
93CW0025 | 2 | 1985-12-31 | S |
79CW0387 | 4 | 1985-12-31 | S |
CA12111 | 3 | 1953-09-28 | S |
86CW0142 | 1 | 1953-09-28 | S |
85CW0119 | 11 | 1953-09-28 | O, S |
W8348 | 2 | 1882-06-02 | O |
W8347 | 1 | 1882-06-02 | O |
W8346 | 2 | 1882-06-02 | O |
80CW0468 | 7 | 1882-06-02 | 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 41,312 AF. Its most recent year on record, 2024, came in at 31,218 AF — 76% of that, and 2nd 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) |
|---|---|---|---|---|---|
| 2010 | 39,898 | 5th lowest of 15 · 97% of median | 36,143 | 363 | 661.0 |
| 2011 | 54,015 | 14th lowest of 15 · 131% of median | 51,914 | 365 | 850.0 |
| 2012 | 41,312 | 8th lowest of 15 · 100% of median | 40,257 | 366 | 269.0 |
| 2013 | 62,619 | 15th lowest of 15 · 152% of median | 54,362 | 365 | 858.0 |
| 2014 | 35,552 | 3rd lowest of 15 · 86% of median | 39,002 | 365 | 502.0 |
| 2015 | 38,407 | 4th lowest of 15 · 93% of median | 37,032 | 361 | 523.0 |
| 2016 | 40,440 | 6th lowest of 15 · 98% of median | 45,801 | 364 | 394.0 |
| 2017 | 49,054 | 11th lowest of 15 · 119% of median | 44,553 | 355 | 494.0 |
| 2018 | 50,244 | 12th lowest of 15 · 122% of median | 52,241 | 365 | 766.0 |
| 2019 | 50,599 | 13th lowest of 15 · 122% of median | 42,324 | 365 | 707.0 |
| 2020 | 48,635 | 10th lowest of 15 · 118% of median | 65,021 | 366 | 585.0 |
| 2021 | 41,071 | 7th lowest of 15 · 99% of median | 39,250 | 293 | 640.3 |
| 2022 | 48,101 | 9th lowest of 15 · 116% of median | 91,504 | 363 | 298.0 |
| 2023 | 27,867 | 1st lowest of 15 · 68% of median | 78,542 | 365 | 246.4 |
| 2024 | 31,218 | 2nd lowest of 15 · 76% of median | 69,391 | 305 | 402.1 |
Trends for this structure
Recorded use shows no clear trend over its last 15 recorded years — which is itself worth knowing.
Its reference gage, DAVIDSON DITCH: no clear flow trend.
How good is our record of it?
Grade A (9/10 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 | 26 right(s), seniority decoded |
| diversion record | stale | 15529 measured days, but newest is 664 day(s) before the data's end (target 450) |
| record continuity | continuous | 100% of the irrigation seasons in 1974-2024 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.