Green River Basin

Division 6 · Water District 56

Auto-mapped

Green River Basin on the ground — the ditches, wells, reservoirs and gages of Water District 56 · clicktap anything for its record

The drilled-depth cells in view, as a table

Each row is one ~3-mile cell (0.04°): the median of the depths drillers filed for the wells spotted inside it, and how many wells that median stands on. Cells with fewer than five filed depths are left blank on the map and out of this table. This is the driller’s own number, filed once when the well was drilled; it says how deep wells here typically go, not where the water table is and not whether wells are getting deeper. Spotting is the file’s own, about a mile at best.

Lat	Lon	Median drilled depth, ft	Wells with a depth

Browse this district’s ditches, gages, reservoirs, wells and springs as a list.

20% of normal flow, week of 2026-06-29

9 calls active on it right now

The Green River is critically low for late June -- 20% of normal flow. 9 calls stand against it right now; the most senior right calling dates to 1882.

Full diagnostic snapshot pending — this district's weekly-style report (system status, active calls, hydrographs, anomaly flags) is produced by the nightly rotation and appears here after its first run. The tabs above are live now.

Reconstruct conditions as of

Evolution of the network

This year, in context

In the weeks around 2026-07-06 (the newest reading on file), flows at the 2 ranked gages are running at a median 100% of their own long-term norm for this window — 1 below a typical year, 1 at or above. Driest relative to its record: GREEN RIVER NEAR JENSEN, UT, ranking 16th lowest of 80 years.

How this comparison is made

Each gage's mean flow over the 3 days either side of 2026-07-06, compared with the same window in every year of its own record — so a gage is only ever measured against itself, and gages with no record in the window are counted out rather than guessed.

Gage flow trend & changepoints

What counts as a trend here

Computed 2026-08-30 21:06 from 4 gage(s) with cached period-of-record data. The series is each gage's annual mean flow in cfs (years with ≥300 days of record). Mann-Kendall (trend, with the Hamed–Rao correction for serial correlation — persistence can otherwise fake significance) and Pettitt (changepoint) both require at least 8 years spanning at least 10 years of record. A gage below that reports no signal — which is not the same as “no change.” The %-per-decade figure is the same Sen slope divided by the gage's median annual flow, for comparing across streams of very different size; it is omitted for near-ephemeral channels where the median is too small to divide by honestly.

Of the 4 gages with enough record, 0 are trending down and 0 up, and 1 carries a detected shift. The other 3 show no clear signal either way.

Drought history, cost, and the four-century context moved to the Drought tab.

Gage	Trend	Change / decade cfs · % of median annual flow	Significance	Years	Changepoint
▸ Green River near Jensen, Ut GRNJENUT	no clear trend	-123.64 cfs -2.9%	p=0.059	79	~1986

3 other gage(s) show no significant trend or changepoint (not shown).

How the measurement network itself changed

This basin was not always measured the way it is today — the API-era record is dense and recent, the early record sparse. 3 gage(s) and 61 structure(s) report in 2026, but structure reporting only reached half its modern level around ~1980. Every historical claim below is checked against this: long-term shifts that co-move with the growth of the network carry an explicit measurement-evolution caution, and abandonment screens whose idleness begins before the modern reporting era are flagged †.

Decade	Gages with data (median yr)	Structures reporting (median yr)
1940s	1	0
1950s	1	0
1960s	1	0
1970s	1	38
1980s	1	47
1990s	1	46
2000s	2	46
2010s	3	64
2020s	3	61

Mass-balance (network closure) trend

Structure divrec-history backfill coverage as of the last check: 12% of 305 schematic-relevant structures. 0 year(s) clear the 30% coverage gate so far -- the trend activates automatically once qualifying years span a full decade. No action needed; the nightly backfill keeps extending the record.

Reach gain/loss shifts (–)

Mass-balance kinks computed for every summer month back to (0 reach-snapshots) — which reaches gain or lose water, and how that has shifted across decades. Each shift is cross-checked against the observation record above: as more diversions became metered, "unaccounted" water shrinks mechanically, which can masquerade as a hydrologic shift.

No reach shows a statistically significant long-term gain/loss shift.

Groundwater now has its own tab: 4 monitored well(s), water-table trends, stream corridors, and the advisory depletion screen.

Reservoirs now has its own tab: 23 reservoir(s), end-of-year storage back to 1970, click-to-chart histories.

Cross-gage pattern fingerprint

Not enough gages with a long enough common-coverage window yet to fingerprint shared patterns.

Data provenance & quality

Where these numbers come from and how far they can be trusted. Grade C (3/6 points) — the components below are the finding; the letter alone is not. Sources: DWR HydroBase snapshot HydroBase_CO_20260707 (imported 2026-08-19) for history, plus the CDSS REST API for current conditions.

Check	State	What was measured
gage freshness	stale	newest gage reading is 55 day(s) old (target 7)
diversion record	expected-lag	newest diversion record is 320 day(s) old (DWR publishes ~1 year in arrears)
structure coverage	sparse	12% of schematic structures have data

Independent check: PASS — 100.0000% agreement across 144,426 stored values re-checked against DWR's authoritative record (HydroBase_CO_20260707), over 20 structures. 0 disagreement(s) beyond a 0.01 cfs tolerance. Checked 2026-08-19; a rotating sample covers the whole basin across successive runs, and the structures this report cites are checked every time.

Federal cross-check: PASS — 99.94% day-level agreement with USGS's own published records for the same gages, across 2 co-listed station(s) and 30,686 overlapping days (within max(2%, 0.5 cfs) daily). Pre-1950 records at some gages carry known between-agency day-stamp and transcription differences — scored at each year's best ±1-day alignment; residual disagreement is real historical divergence, flagged for review.

4 gage(s) / 42,064 daily values (1946-10-01–2026-07-06); 127 structure(s) with diversion records; 909 with decreed rights. Methodology has not yet had independent expert review — treat every figure as an advisory screen, not an administrative or legal conclusion.

11 water-level measurements across 4 monitored well(s) — 1 alluvial, 0 bedrock — plus 4 administered well(s) reporting metered pumping.

What is being counted

Observation wells and pumping wells are different populations and are never conflated: water levels come from monitored observation wells, and metered pumping comes from administered wells reporting through diversion records. Click any well to chart its own record.

Well map

3D aquifer x-ray

Every aquifer unit as its own head surface, animated through time.

How the surfaces are built, and what they are not

Alluvial water table on top, Denver Basin members (Dawson, Denver, Arapahoe, Laramie–Fox Hills) stacked beneath where measured, interpolated from measured water levels. Units are never mixed; a surface exists only inside its own unit's well coverage, with no extrapolation; thin epochs are suppressed and say why. Vertical scale is exaggerated for readability and z is head elevation in feet. These are measured heads, not a calibrated groundwater model.

Water-table trends

Of 0 well(s) with enough record for a trend test: 0 declining, 0 rising.

Wells labeled by administrative world before anything else is said about them: tributary alluvium participates in the priority system; designated-basin and Denver Basin bedrock aquifers are governed differently and are excluded from stream-connection reasoning. Read bedrock declines differently too: deep bedrock aquifers recharge negligibly on human timescales, so a falling bedrock level is storage mining — effectively permanent — not a drought response that a wet year undoes. All screens advisory.

23 reservoir(s) with 2,573 storage measurement(s), 1970–2026. Basin storage as of 2025-10-31 (the record's own end — reservoir records publish ~annually): 4,166 AF across 17 reservoir(s).

Why storage matters to the flow network

Storage change is real water the mass balance must credit — a losing reach beside a filling reservoir isn't losing water, it's banking it.

Reservoir map — how full is each vessel?

What “full” is measured against

Bubble size is proportional to a reservoir's record-high storage. Fill is its last recorded storage as a share of its surveyed capacity (USACE National Inventory of Dams) where a confident NID match exists — the tooltip names the matched dam — and as a share of its own record high otherwise. A wrong capacity would be worse than an honest record high, so only confident joins upgrade.

A dashed teal ring marks reservoirs reporting live DWR telemetry: their fill reflects yesterday's storage, is drawn as a dotted tail on charts, and is treated as provisional until the next verified HydroBase snapshot supersedes it.

A dashed red ring marks a dam under an active storage restriction from DWR's Dam Safety branch — the State Engineer has limited how much it may legally store, so a low fill can be an order, not a drought. Hazard class and inspection condition come from the same record, joined only where the dam carries this reservoir's WDID or a confident NID match — a wrong dam's restriction would be worse than none shown.

Basin storage, end of each water year

End-of-water-year totals; per-year reservoir counts shown because reporting coverage varies -- a total is only comparable to years with similar counts.

Largest reservoirs on record

Click a row to chart its full storage history, or open its dossier for rights, documents and dam-safety facts.

Reservoir	Last recorded storage (AF)	As of	Full	Dam (DWR Dam Safety)
▸ MATT WARNER RESERVOIR (5603901)	2,640	2024-12-06	—	—	dossier →
▸ CALDER RESERVOIR NO. 2 (5603903)	1,080	2024-12-06	—	—	dossier →
▸ CROUSE RESERVOIR (5603904)	425	2024-12-06	—	—	dossier →
▸ LOWER RAFTO HOME RANCH FISH POND (5603655)	8	2025-10-31	—	—	dossier →
▸ BASSETT RESERVOIR (5603710)	6	2025-10-31	—	—	dossier →
▸ UPPER HOME RANCH RESERVOIR (5603654)	4	2025-10-31	—	—	dossier →
▸ AINGE RESERVOIR (5603709)	2	1985-10-28	—	—	dossier →
▸ DOUGLAS RESERVOIR (5603506)	1	2023-10-31	—	—	dossier →

Right now

This is the 16th-driest week 27 in 80 years of record at GREEN RIVER NEAR JENSEN, UT (as of 2026-06-29; this week’s flow sits at the 20th percentile for the date). On this week’s US Drought Monitor, Gilpin County is 39% in D3 extreme drought (2026-09-01). The law agrees: the most senior active call leaves 99% of this district’s decreed flow rights junior to the calling right this week.

Every year since 1946, week by week

Each thin row is a year at GREEN RIVER NEAR JENSEN, UT; each cell is one week’s flow ranked against the same calendar week of every other year — warm means dry for the date, blue wet, so seasonality cancels and droughts appear as warm bands. Gaps are missing record, never a dry river. Click a year to reconstruct it on the Historical tab.

The Drought Monitor’s view since 2000

Mean share of area in each class across Gilpin, Moffat counties — the counties this district’s gages sit in, which overlap the district imperfectly. The Drought Monitor weighs soils, vegetation and local reports; it is CONTEXT beside the river’s own record above, not the water-rights picture.

The law’s own drought gauge

When water runs short, administration answers: calls reach further back in time, and more decreed rights go junior to the calling right. This is that response, weekly since 2004 — the share of this district’s decreed flow rights junior to the most senior active call. Watch it spike in the named droughts below, and linger after the river recovers.

Computed from DWR’s call record (80 calls touching this district) against the district’s rights index. Scoping is deliberately coarse — a call’s own district, or districts named in its comments — and this is administration’s RESPONSE, not a per-structure verdict (each dossier’s curtailment card does that, with stream miles). A deepening call can also reflect growing demand, not only shrinking supply.

This basin’s droughts, by its own record

Drought	Span	Weeks	Trough percentile	Recovery
unnamed dry spell	2025-06-30 → 2026-02-16	33	24th (2025-08-11)	not yet
the 2020-22 drought	2022-03-14 → 2022-10-17	31	25th (2022-05-02)	6 weeks
the 2020-22 drought	2021-03-22 → 2022-02-21	48	11th (2021-08-09)	40 weeks
the 2012-13 drought	2012-09-10 → 2014-06-16	92	15th (2012-11-19)	9 weeks
unnamed dry spell	2007-09-03 → 2008-08-11	49	16th (2008-04-14)	2 weeks
the 2002 drought	2003-08-04 → 2005-02-21	81	16th (2003-12-29)	19 weeks
the 2002 drought	2001-07-30 → 2003-07-28	104	5th (2002-10-14)	101 weeks
unnamed dry spell	2000-10-23 → 2001-03-26	22	23rd (2000-11-27)	223 weeks
unnamed dry spell	1994-08-29 → 1995-02-20	25	25th (1994-11-21)	21 weeks
unnamed dry spell	1992-07-27 → 1993-05-10	41	20th (1992-11-02)	6 weeks
unnamed dry spell	1991-05-20 → 1991-11-11	25	26th (1991-07-08)	10 weeks
unnamed dry spell	1990-05-07 → 1991-04-01	47	17th (1990-10-08)	42 weeks
unnamed dry spell	1988-10-03 → 1990-03-05	74	18th (1989-09-25)	98 weeks
the 1981 drought	1981-06-01 → 1981-11-09	23	24th (1981-08-24)	6 weeks

Detected mechanically: the 26-week smoothed percentile below the 30th for at least 20 weeks; recovered on regaining the 50th. The knobs are stated because the episode list depends on them — a different reasonable choice merges or splits episodes at the edges. Names are attached where an episode overlaps a drought Colorado already talks about.

What drought has cost here

Since 1991, federal crop insurance has paid $302,432 in drought-caused claims across Gilpin, Moffat counties — 1.0% of all insured crop losses there. The worst year was 2013 ($128,960).

USDA crop-insurance indemnities where the recorded cause of loss is drought, summed over the counties this district's gages sit in. Counties overlap water districts imperfectly, and insured-crop claims are a floor on drought damage, not a total. Source: USDA RMA cause-of-loss files.

When this basin claimed its water

Every bar is a year’s new appropriations (677 rights across 81 years of shared record), colored by that year’s wetness from the barcode above. Here the correlation is +0.13 — essentially no wet-dry pattern; here, law and settlement set the pace, not the weather. Across the state both behaviors exist: ephemeral southwest basins file after wet demonstrations, transbasin-source basins under drought — and the biggest statewide filing waves sat in the 1950s drought and after 2002, not in the wet 1980s–90s.

Appropriation dates are the CLAIMED initiation of a right, not the courthouse filing date; the record is survivor-biased (abandoned claims are absent, so failed dry-era scrambles are undercounted); and the big 1960s and 2000s spikes sit on legal events — the pre-1969-Act adjudication era and 2000s legislation — not on weather. A correlation here is a description, never a cause.

New to how a dry winter becomes a call on the river? Anatomy of a drought walks the chain in four minutes — snow to rivers to reservoirs to calls to the water table.

Decreed rights on this network run from 1880-04-15 to 2021-06-30. Of the 20 structures with a yield estimate, the median one’s senior right was in priority 8% of a median irrigation season and 0% in a dry one. 25 abandonment screens and 52 compliance flags are listed below as leads for review — a screen is not an abandonment and a flag is not a violation.

Rights on file: 1028 across 909 structure(s); 29 structure(s) carry 0 court-case references. Advisory reading aids on public DWR data — not administrative or legal conclusions.

Is the river getting harder to divert from?

Over 2003–2025, administration on this district has been tightening: 1 of 3 measures (days under call, calls set, seniority of the controlling call) are moving toward more administration, none the other way.

The three measures, year by year

One row per whole calendar year inside the call record's coverage (23 years); partly-covered years are omitted rather than reported as quiet. Trend is Mann-Kendall with the same significance gate as every other trend on this site. Counted from DWR's published call record, which begins in the early 2000s: earlier years are absent, not quiet. A rise in the number of calls set can also reflect how finely an administrator records one episode, which is why days under call -- insensitive to that -- is the component to read first. Advisory summary of the public record, not an administrative finding.

Year	Days under call	Calls set	Controlling priority (median)
2014	204	38	1882-04-01
2015	215	27	1882-04-01
2016	198	56	1882-04-01
2017	185	73	1883-06-30
2018	197	95	1882-04-01
2019	177	30	1882-04-01
2020	204	109	1882-04-01
2021	250	158	1882-04-01
2022	249	87	1882-04-01
2023	365	50	1904-01-02
2024	306	75	1882-04-01
2025	186	97	1882-04-01

Why diversions stopped — call-based explanations

Sustained diversion stops matched to senior administrative calls.

BEAVER DITCH (5600524) DWR↗ stopped 2025-04-29 (34+ days) — call at HOME DITCH NO 2 curtailing 71% of its decreed rate [heuristic-partial]
BEAVER DITCH (5600524) DWR↗ stopped 2024-07-14 (260+ days) — call at WISCONSIN DITCH curtailing 100% of its decreed rate [heuristic-strong]
MCKNIGHT NO 1 (5600562) DWR↗ stopped 2024-05-21 (317+ days) — call at SIMON DITCH curtailing 100% of its decreed rate [heuristic-strong]

Right yield — how often could these rights actually divert?

Share of irrigation-season days each structure's rights were not called out, derived from the 22-year district-scoped call record (senior right = floor, junior right = ceiling constraint). Call-record-derived; DWR's own analysis governs where available.

Structure	Senior priority	Senior right: median / dry yr	Junior right: median / dry yr
WILSON DITCH (A.C.) (5600583) DWR↗	1929-05-01	15.0% / 0.0%	7.5% / 0.0%
JARVIE DITCH (5600588) DWR↗	1916-09-05	7.5% / 0.0%	7.5% / 0.0%
SPITZIE DITCHES (5600575) DWR↗	1960-03-10	7.5% / 0.0%	7.5% / 0.0%
NELSON DITCH (5600565) DWR↗	1960-02-22	7.5% / 0.0%	7.5% / 0.0%
VERMILLION DITCH (5601180) DWR↗	1974-10-31	7.5% / 0.0%	7.5% / 0.0%
HOY DITCH (5600556) DWR↗	1959-05-01	7.5% / 0.0%	7.5% / 0.0%
HORSESHOE DITCH (5600555) DWR↗	1961-01-30	7.5% / 0.0%	7.5% / 0.0%
WARREN DITCH (5600578) DWR↗	1960-02-28	7.5% / 0.0%	7.5% / 0.0%
GRIMES DITCH (5600594) DWR↗	1970-02-04	7.5% / 0.0%	7.5% / 0.0%
HOG LAKE DITCH (5600554) DWR↗	1960-03-02	7.5% / 0.0%	7.5% / 0.0%
BEAVER DITCH (5600524) DWR↗	1893-04-01	15.4% / 4.7%	7.5% / 0.0%
FLYNN BOTTOM DITCH (5600590) DWR↗	1972-06-26	7.5% / 0.0%	7.5% / 0.0%

Abandonment radar (25 screens)

Absolute rights with 10+ years of no recorded diversions. Screens only — storage, alternate points, and plan operations can explain nonuse lawfully. And diversion REPORTING itself only reached its modern level ~1980 — idleness that begins before then may be unreported use, not nonuse (flagged † below).

OUTLET DITCH (5600567) DWR↗ (1917-06-01, 2.7 cfs decreed): last active 1974 — 51 years idle † predates modern reporting era — last recorded activity predates this basin's modern reporting era (~1980) -- early absence of record is weak evidence of nonuse
CALLOWAY SPGS PL (5600530) DWR↗ (1954-09-26, 0.0 cfs decreed): last active 1986 — 39 years idle
SUGARLOAF WATER LINE (5600576) DWR↗ (1955-06-13, 0.1 cfs decreed): last active 1986 — 39 years idle
LEE SPRING (5600601) DWR↗ (1971-03-01, 0.1 cfs decreed): last active 1986 — 39 years idle
HAUNTED SPG DITCH (5600553) DWR↗ (1917-06-01, 4.8 cfs decreed): last active 1995 — 30 years idle
OFFIELD DITCH (5600566) DWR↗ (1914-04-28, 3.0 cfs decreed): last active 2003 — 22 years idle
VRLP I/C/D (5600516) DWR↗ (1976-05-01, 1.5 cfs decreed): last active 2009 — 16 years idle
EAST GULCH FEEDER (5600539) DWR↗ (1951-06-01, 0.5 cfs decreed): last active 2009 — 16 years idle
CARMA SPG & DITCH (5600589) DWR↗ (1933-12-31, 0.2 cfs decreed): last active 2009 — 16 years idle
DOUGLAS MOUNTAIN SPRINGS DITCH (5600668) DWR↗ (1887-06-01, 1.0 cfs decreed): last active 2009 — 16 years idle

Compliance screens (52 advisory flags)

Screened 75 of 909 structures with rights (109 have diversion history on file). A flag is a lead for expert review — augmentation plans, exchanges, and free-river conditions can make over-decree diversions lawful and are deliberately not modeled.

FLYNN BOTTOM DITCH (5600590) DWR↗: Observed p99 daily rate 23.3 cfs (max 23.3) exceeds total decreed absolute 6.6 cfs across 3642 recorded day(s).
GRIMES DITCH (5600594) DWR↗: Observed p99 daily rate 15.0 cfs (max 15.5) exceeds total decreed absolute 9.1 cfs across 878 recorded day(s).
HORSESHOE DITCH (5600555) DWR↗: Observed p99 daily rate 12.0 cfs (max 15.0) exceeds total decreed absolute 10.0 cfs across 5986 recorded day(s).
WARREN DITCH (5600578) DWR↗: Observed p99 daily rate 12.0 cfs (max 20.0) exceeds total decreed absolute 10.0 cfs across 5188 recorded day(s).
NELSON DITCH (5600565) DWR↗: Observed p99 daily rate 10.8 cfs (max 10.8) exceeds total decreed absolute 10.0 cfs across 6132 recorded day(s).
BEAVER DITCH (5600524) DWR↗: Observed p99 daily rate 7.8 cfs (max 24.0) exceeds total decreed absolute 7.0 cfs across 7846 recorded day(s).
MILES DITCH (5600564) DWR↗: Observed p99 daily rate 7.1 cfs (max 12.0) exceeds total decreed absolute 3.5 cfs across 3640 recorded day(s).
EAST GULCH FEEDER (5600539) DWR↗: Observed p99 daily rate 6.8 cfs (max 9.6) exceeds total decreed absolute 0.5 cfs across 2464 recorded day(s).
DEJOURNETTE D NO 1 (5600587) DWR↗: Observed p99 daily rate 5.7 cfs (max 5.7) exceeds total decreed absolute 4.0 cfs across 5894 recorded day(s).
MCKNIGHT NO 1 (5600562) DWR↗: Observed p99 daily rate 5.1 cfs (max 5.3) exceeds total decreed absolute 5.0 cfs across 5712 recorded day(s).

Seniority (top structures by decreed rate)

Structure	Senior priority date	Rights	Decreed abs (cfs)	Conditional?
WILSON DITCH (A.C.) (5600583) DWR↗	1929-05-01	2	15.0	—
JARVIE DITCH (5600588) DWR↗	1916-09-05	2	15.0	—
SPITZIE DITCHES (5600575) DWR↗	1960-03-10	2	12.0	—
HORSESHOE DITCH (5600555) DWR↗	1961-01-30	2	10.0	—
HOY DITCH (5600556) DWR↗	1959-05-01	1	10.0	—
NELSON DITCH (5600565) DWR↗	1960-02-22	2	10.0	—
WARREN DITCH (5600578) DWR↗	1960-02-28	2	10.0	—
VERMILLION DITCH (5601180) DWR↗	1974-10-31	1	10.0	—
GRIMES DITCH (5600594) DWR↗	1970-02-04	1	9.1	—
HOG LAKE DITCH (5600554) DWR↗	1960-03-02	1	9.0	—
BEAVER DITCH (5600524) DWR↗	1893-04-01	2	7.0	—
FLYNN BOTTOM DITCH (5600590) DWR↗	1972-06-26	1	6.6	—
PRESTOPITZ DITCH (5600570) DWR↗	1882-04-01	2	6.0	—
ROUFF NO 1 DITCH (5600571) DWR↗	1886-09-15	4	6.0	—
SPARKS DITCH (5600573) DWR↗	1882-04-01	3	6.0	—

No inventory or legal-document changes detected since the daily watch began.

Water-court filings this month (division-wide)

5 applications in the 2026-08 resume for this basin's division — new rights, changes, augmentation plans — from the water clerk's statutory monthly notice (C.R.S. 37-92-302), the earliest public signal of a new claim. Filings are division-wide, not district-filtered: check the county column. Full resume PDF at the Judicial Branch →

Anyone affected may file a statement of opposition until 2026-10-31 (56 days left). C.R.S. 37-92-302(3): due by the last day of the second month following the filing month — computed, not legal advice; confirm with the water clerk.

All 5 filings, with excerpts

Case	What it asks	County	Excerpt
`2026CW10`	—	ROUTT	2026CW10 Routt County Application for Absolute Water Rights (Storage). Applicant: Wilton Earle 785 Valley View Drive Craig, CO 81625; 970-824-6258; rettae74@gmail.com.; Logan Earle 785 Valley View Drive Craig, CO 81625; 970-620-5288; earlelogan679@gmail.com St…
`2026CW11`	—	RIO BLANCO	2026CW11 Rio Blanco County Application for Simple Change in Surface Point of Diversion. Applicants: John and Diana Hartman, 2804 E Main Street, Rangely, CO 81648, 970-618-0088, dgrantelk@gmail.com Structure: Calvat Ditch. Original Decree: CA099. Case: 11/26/19…
`2026CW3009`	reasonable diligence	—	2026CW3009 ROUTT AND RIO BLANCO COUNTIES, Prima Ranches LLC, c/o David Harbaugh, 3575 E Cherry Creek North Drive, Denver, CO 80209, (303) 478-8997. Please address all correspondence to: Geoffrey M. Williamson, Katherine Carter, Berg Hill Greenleaf Ruscitti LLP…
`2026CW3010`	change of water right, plan for augmentation, new underground right	ROUTT	2026CW3010 ROUTT COUNTY Water Division: 6. DISTRICT COURT, WATER DIVISION SIX, STATE OF COLORADO, Routt County Combined Court, 1955 Shield Drive, Unit 200, Steamboat Springs, CO 80487. CONCERNING THE APPLICATION FOR WATER RIGHTS OF SIDNEY PEAK RANCH OWNERS’ AS…
`2026CW3011`	change of water right	RIO BLANCO	2026CW3011 RIO BLANCO COUNTY – WHITE RIVER. Mahogany Ranch, LLC, c/o Kevin L. Patrick, and John M. Sittler, Patrick, Miller & Noto, P.C., 229 Midland Ave., Basalt, CO 81621. (970) 920-1030. APPLICATION FOR CHANGE OF WATER RIGHT. Summary of Application: Applica…

Active substitute water supply plans in this district

Temporary State Engineer approvals to divert out of priority (37-92-308 / 37-90-137). A structure operating under one behaves differently under a call than its decreed rights alone suggest — the priority tables above don't know about these; this list does. Source: DWR’s active-SWSP register, refreshed nightly.

Plan	Type	Status	Expires	Structure	Documents
US FWS HORSESHOE DITCH AND ENLARGEMENT	37-92-308(4) PLAN PENDING COURT APPLICATION	Withdrawn	—	—	plan file

If a call were placed at a given seniority, which structures in this basin would be out of priority, and how much of their decreed rate would be curtailed? Computed from this basin's cached decrees.

What this does and doesn't model. Seniority arithmetic only: every right junior to the call is treated as curtailed. It does not model reach applicability — structures downstream of the calling point are not administered by it — and it applies no futile-call judgment. Read it as “who is junior to this date, and by how much,” not as a prediction of what the Division Engineer would actually order.

Pick a calling right

Real decrees from this basin, ordered by administration number — that is, by actual seniority. The years will look out of order, and that is correct: an administration number encodes the adjudication date as well as the appropriation date, so a right appropriated in 1970 can be administered ahead of one from 1950. A senior call curtails almost everything; a junior one curtails almost nothing.

Or enter an administration number directly

Administration number

DWR administration numbers encode appropriation and adjudication dates; lower is more senior.

Topology cross-check: 10 parent disagreements (vs DWR's route framework — under review)

This flow network was built mechanically; DWR's Source Water Route Framework disagrees with it in the places below. Each row is a question a human reviewer has not yet answered — not an error verdict. Checked 12 streams, 2 agree. Know this water? Tell us →

Stream	This site routes it to	DWR routes it to
Birdie Gulch	the mainstem	nan
Skeltcher Creek	the mainstem	Beaver Creek
Fisher Creek	the mainstem	nan
NS Creek	the mainstem	Antone Canyon Creek
Canyon Creek	the mainstem	Vermillion Creek
G Wash	the mainstem	Canyon Creek
Fonce Wash	the mainstem	G Wash
Shell Creek	the mainstem	Vermillion Creek

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