North Fork/Tribs.

Evolution of the network

This year, in context

In the weeks around 2026-07-06 (the newest reading on file), flows at the 48 ranked gages are running at a median 100% of their own long-term norm for this window — 23 below a typical year, 25 at or above. Driest relative to its record: SMITH FORK NEAR LAZEAR, CO., ranking 3rd lowest of 26 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 19:59 from 81 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 81 gages with enough record, 0 are trending down and 1 up, and 1 carries a detected shift. The clearest is Tongue Creek at Cory, its annual mean flow changing +25.53 cfs per decade (+66.5% of its median annual flow) over 20 years (p=0.0026). The other 80 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
▸ ⚠️ Tongue Creek at Cory☆ TONCORCO	↑ increasing	+25.53 cfs +66.5%	p=0.003	20	~1977

⚠️ 1 gage flagged: their records may have quietly shifted against their neighbours, so treat their trends with caution.

How drift is detected

Every gage's annual flows are compared against each neighbour's as a double-mass curve (Searcy & Hardison, USGS WSP 1541-B); a Pettitt step test looks for a break in the ratio. A gage is flagged only when the breaks AGREE across its references, and a break against an already-suspect gage is never counted against a healthy one. A double-mass break means the ratio between two gages changed, not that either gage is faulty: a new diversion, a reservoir, or an import changes that ratio exactly as a rating shift does. Screening aid for expert review, never a measurement verdict.

80 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. 54 gage(s) and 609 structure(s) report in 2026, but structure reporting only reached half its modern level around ~1970. 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)
1910s	2	0
1920s	2	0
1930s	2	0
1940s	8	0
1950s	7	0
1960s	9	0
1970s	5	636
1980s	13	700
1990s	10	676
2000s	19	693
2010s	20	670
2020s	24	615

Mass-balance (network closure) trend

Structure divrec-history backfill coverage as of the last check: 13% of 3705 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 (1950–2026)

Mass-balance kinks computed for every summer month back to 1950 (488 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.

• TONGUE CREEK AT CORY, CO: reach shifted from -18 cfs to +33 cfs summer mean (more gaining, p=0.006, 23 yr) [alluvial valley: real alluvial aquifer -- a decades-long shift toward losing is the classic signature of alluvial pumping and urbanization] [measurement-evolution caution: this shift co-moves with the growth of the gage/metering network (rho=0.49) -- part of it may be unaccounted water becoming accounted, not hydrologic change]

Groundwater now has its own tab: 99 monitored well(s), water-table trends, stream corridors, and the advisory depletion screen.

Reservoirs now has its own tab: 209 reservoir(s), end-of-year storage back to 1970, click-to-chart histories.

Cross-gage pattern fingerprint

Over the 51-year window with full coverage (1976–2026), the dominant shared pattern across 3 gage(s) explains 87% of year-to-year variance (almost certainly a basin-wide climate/snowpack driver).

All gages in this window move with the shared pattern -- no localized outlier.

Structures most implicated by reconciliation (as of 2026-07-06)

Which structures' data absorbed the most correction when the current mass-balance snapshot was reconciled -- see the Historical tab for the full picture on any date.

• DRY FK 11 (diversion): +10.0 cfs (14% of that reach's correction)
• COAL CREEK POND NO 3 (diversion): +10.0 cfs (14% of that reach's correction)
• COAL CREEK POND NO. 2 (diversion): +10.0 cfs (14% of that reach's correction)
• SNOWSHOE PIPELINE (diversion): +10.0 cfs (14% of that reach's correction)
• SNOWSHOE DAM AND RES (diversion): +10.0 cfs (14% of that reach's correction)
• BERG DITCH (diversion): +10.0 cfs (14% of that reach's correction)
• CRYSTAL MEADOWS POND NO. 1 (diversion): +10.0 cfs (14% of that reach's correction)
• DREYFUS RESERVOIR (diversion): -3.8 cfs (8% of that reach's correction)
• CARBONATE CAMP RES NO 4 (diversion): -3.8 cfs (8% of that reach's correction)
• CARBONATE CAMP RES NO 2 (diversion): -3.8 cfs (8% of that reach's correction)

209 reservoir(s) with 56,824 storage measurement(s), 1970–2025. Basin storage as of 2024-10-31 (the record's own end — reservoir records publish ~annually): 18,978 AF across 169 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)
▸ CRAWFORD RESERVOIR (4003553) ☆	3,521	2024-10-31	—	—	dossier →
▸ FRUITLAND RESERVOIR (4003395) ☆	1,872	2024-10-31	—	—	dossier →
▸ PARK RESERVOIR (4003355) ☆	1,755	2024-10-31	—	—	dossier →
▸ EGGLESTON LAKE (4003312) ☆	1,585	2024-10-31	—	—	dossier →
▸ PAONIA RESERVOIR (4003416) ☆	1,138	2024-10-31	—	—	dossier →
▸ DEEP WARD LAKE RES (4003310) ☆	1,001	2024-10-31	—	—	dossier →
▸ LEON LAKE RESERVOIR (4004520) ☆	965	2013-10-31	—	—	dossier →
▸ LAKE BRENNAND RES (4003396) ☆	498	2024-10-17	—	—	dossier →

Snow-water equivalent, WY2026

No snow on the ground — normal for the date; the snow year begins in October. The chart shows the full water year just ending.

SNOTEL site	Elev (ft)	SWE (in)	Median (in)	% of median	Typical peak
Mc Clure Pass	8760	0.0	0.0	—	April 4 (16.6 in)
Overland Res.	9890	0.1	0.0	—	April 5 (12.4 in)
Park Reservoir	9990	0.0	0.0	—	April 26 (27.4 in)

NRCS SNOTEL, daily. Sites are assigned to the district whose boundary contains them — the snow that feeds this district can also sit in a neighboring headwater district.

Two ways a snow year goes wrong (1979–2026)

A bad snow year here comes in two flavors (both called snow droughtA winter that shorts the snowpack. It happens two ways: a dry one, where the snow never comes, and a warm one, where near-normal snow falls but melts off weeks early -- and the river feels them differently.), and the river feels them differently. In 9 of the last 48 winters the snow never came — the pack peaked below 80% of its median. In 0 more, the snow came but left early — a near-normal peak melted out two weeks or more ahead of its usual date, sending the water down before the season needed it. This year was one of the dry ones: the pack peaked at 51% of median.

The snow never came: 1990, 1999, 2002, 2012, 2013, 2015, 2018, 2025, 2026.

Computed by this site from 3 SNOTEL sites’ full daily records (NRCS AWDB, back to 1979). Each year is measured against each site’s own multi-decade median — not the 1991–2020 normal the chart above uses — so the 1980s grade against a fair baseline. Peak and melt-out need 85% of the season’s days on the record; thin years are dropped, not guessed. Derived from snow measurements alone — it cannot tell dry-from-warm causes apart, only what the snowpack did.

Runoff outlook — Paonia Reservoir Inflow

NRCS's final issue (2026-06-01) calls it even odds that at least 2 kAF arrives over 06-01 to 06-30 — 15% of a normal season; almost certainly at least 0, probably not more than 7. New forecasts begin in January. How to read these numbers →

90% chance of at least	70% chance of at least	50% chance of at least	30% chance of at least	10% chance of at least	Normal
0	1	2	4	7	13

Runoff outlook — NF Gunnison R nr Somerset

NRCS's final issue (2026-06-01) calls it even odds that at least 21 kAF arrives over 06-01 to 07-31 — 23% of a normal season; almost certainly at least 12, probably not more than 62. Our own record at this gage shows 23 kAF actually delivered (partial record: 36 of 61 days). New forecasts begin in January. How to read these numbers →

We test a record-based adjustment of the April benchmark at every graded point. Here it did not beat NRCS over 46 replayed seasons (15% typical miss unadjusted vs 18% adjusted), so none is shown — NRCS’s own forecast, unadjusted, is the best April benchmark available for this river. Why we test →

90% chance of at least	70% chance of at least	50% chance of at least	30% chance of at least	10% chance of at least	Normal	Observed
12	17	21	38	62	91	23

How good are these forecasts here? (1973–2025)

Grading every April issue against what the river then delivered, measured at this gage’s own record — 52 seasons: the median miss of the 50% forecast is 16%, with a high bias of 2%, and the observed volume landed inside the stated 10–90% band 81% of the time (a calibrated forecast would say 80%).

Computed by this site: NRCS's archived April issues (their period as issued each year) against the observed volume in DWR’s published record; years with under 90% daily coverage are dropped, not summed. A grade of the forecast, never of the forecasters — these are hard rivers. How this point ranks among every graded Colorado forecast point →

What April snow has meant for this river (1979–2025)

Across 47 measured years, the season’s water has closely followed the April snowpack: a year opening April with 80% of median snow has typically gone on to deliver about 65% of a normal season (a snow-to-runoff elasticityHow strongly one number moves with another. A snow-to-runoff elasticity of 1.5 means a 10% shortfall in April snowpack has typically become a 15% shortfall in the season's water. of 1.4).

Computed by this site: the district’s April 1 SWE (% of each SNOTEL site’s own-record median) against the observed April–July volume at this gage (% of its median season) — a fixed window every year, unlike the forecast grades above, which use each issue’s own period. The slope is fit so single wild years can’t steer it (Theil–Sen, log space); years missing 10% of their days are dropped.

Runoff outlook — Surface Ck at Cedaredge

NRCS's final issue (2026-06-01) calls it even odds that at least 1 kAF arrives over 06-01 to 07-31 — 26% of a normal season; almost certainly at least 1, probably not more than 4. Our own record at this gage shows 1 kAF actually delivered (partial record: 36 of 61 days). New forecasts begin in January. How to read these numbers →

We test a record-based adjustment of the April benchmark at every graded point. Here it did not beat NRCS over 33 replayed seasons (17% typical miss unadjusted vs 18% adjusted), so none is shown — NRCS’s own forecast, unadjusted, is the best April benchmark available for this river. Why we test →

90% chance of at least	70% chance of at least	50% chance of at least	30% chance of at least	10% chance of at least	Normal	Observed
1	1	1	2	4	5	1

How good are these forecasts here? (1950–2025)

Grading every April issue against what the river then delivered, measured at this gage’s own record — 75 seasons: the median miss of the 50% forecast is 15%, with a high bias of 6%, and the observed volume landed inside the stated 10–90% band 91% of the time (a calibrated forecast would say 80%).

Computed by this site: NRCS's archived April issues (their period as issued each year) against the observed volume in DWR’s published record; years with under 90% daily coverage are dropped, not summed. A grade of the forecast, never of the forecasters — these are hard rivers. How this point ranks among every graded Colorado forecast point →

What April snow has meant for this river (1979–2025)

Across 47 measured years, the season’s water has closely followed the April snowpack: a year opening April with 80% of median snow has typically gone on to deliver about 73% of a normal season (a snow-to-runoff elasticityHow strongly one number moves with another. A snow-to-runoff elasticity of 1.5 means a 10% shortfall in April snowpack has typically become a 15% shortfall in the season's water. of 1.4).

Computed by this site: the district’s April 1 SWE (% of each SNOTEL site’s own-record median) against the observed April–July volume at this gage (% of its median season) — a fixed window every year, unlike the forecast grades above, which use each issue’s own period. The slope is fit so single wild years can’t steer it (Theil–Sen, log space); years missing 10% of their days are dropped.

Right now

This is the 3rd-driest week 27 in 109 years of record at SURFACE CREEK AT CEDAREDGE, CO. (as of 2026-06-29; this week’s flow sits at the 3rd percentile for the date). On this week’s US Drought Monitor, Gunnison County is 22% in D4 exceptional drought (2026-08-25). The law agrees: the most senior active call leaves 100% of this district’s decreed flow rights junior to the calling right this week.

Every year since 1917, week by week

Each thin row is a year at SURFACE CREEK AT CEDAREDGE, CO.; 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 Delta, Gunnison, Montrose 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 (1019 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	2025-08-04 → 2026-02-09	27	15th (2025-10-06)	0 weeks
the 2020-22 drought	2021-07-19 → 2022-01-31	28	20th (2021-10-04)	3 weeks
the 2020-22 drought	2020-08-24 → 2021-03-29	31	18th (2020-10-05)	47 weeks
the 2018 drought	2018-07-16 → 2019-02-11	30	10th (2018-09-24)	2 weeks
the 2012-13 drought	2012-09-03 → 2013-03-04	26	20th (2012-10-29)	37 weeks
the 2002 drought	2000-10-23 → 2003-07-28	144	12th (2002-10-14)	35 weeks
unnamed dry spell	1990-08-27 → 1991-02-18	25	25th (1990-10-15)	35 weeks
unnamed dry spell	1989-10-02 → 1990-03-26	25	20th (1989-11-06)	82 weeks
the 1977 drought	1977-01-31 → 1978-05-22	68	4th (1977-10-31)	4 weeks
unnamed dry spell	1961-02-20 → 1961-07-17	21	25th (1961-04-24)	14 weeks
unnamed dry spell	1960-01-18 → 1960-08-08	29	22nd (1960-02-29)	3 weeks
unnamed dry spell	1959-02-16 → 1959-11-16	39	12th (1959-04-27)	41 weeks
the 1950s drought	1956-01-30 → 1956-10-08	36	15th (1956-03-12)	40 weeks
the 1950s drought	1954-02-01 → 1954-10-18	37	20th (1954-03-22)	30 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 2011, federal crop insurance has paid $8,457 in drought-caused claims across Delta, Gunnison, Montrose counties — 0.0% of all insured crop losses there. The worst year was 2018 ($5,315).

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.

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 1878-07-31 to 2025-06-30. Of the 20 structures with a yield estimate, the median one’s senior right was in priority 7% of a median irrigation season and 0% in a dry one. 25 abandonment screens and 477 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: 7023 across 4661 structure(s); 812 structure(s) carry 3 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	0	0	—
2015	277	127	1885-08-11
2016	366	108	1890-11-17
2017	319	94	1888-01-23
2018	291	160	1882-06-01
2019	319	93	1888-01-25
2020	246	141	1881-12-17
2021	275	103	1883-05-05
2022	365	93	1884-11-01
2023	277	59	1898-10-15
2024	275	56	1883-06-01
2025	365	100	1884-11-01

Why diversions stopped — call-based explanations

Sustained diversion stops matched to senior administrative calls.

• CRYSTAL VALLEY DITCH (4000533) DWR↗☆ stopped 2024-08-29 (15+ days) — call at MINNESOTA CANAL curtailing 100% of its decreed rate [heuristic-strong]
• FREEMAN DITCH NO 2 (4000547) DWR↗☆ stopped 2024-08-29 (31+ days) — call at MINNESOTA CANAL curtailing 100% of its decreed rate [heuristic-strong]
• DIAMOND JOE DITCH (4000537) DWR↗☆ stopped 2024-07-07 (53+ days) — call at NORTH FORK ORCHARD COMPANY DITCH curtailing 100% of its decreed rate [heuristic-strong]
• DYER FORK DITCH (4000543) DWR↗☆ stopped 2024-07-07 (54+ days) — call at NORTH FORK ORCHARD COMPANY DITCH curtailing 100% of its decreed rate [heuristic-strong]
• FREEMAN DITCH NO 1 (4000548) DWR↗☆ stopped 2024-07-07 (85+ days) — call at NORTH FORK ORCHARD COMPANY DITCH curtailing 100% of its decreed rate [heuristic-strong]
• ASPEN CREEK DITCH (4000510) DWR↗☆ stopped 2024-06-16 (137+ days) — call at GROVE DITCH curtailing 100% of its decreed rate [heuristic-strong]
• CRYSTAL VALLEY DITCH (4000533) DWR↗☆ stopped 2024-05-28 (13+ days) — call at COAL CREEK DITCH curtailing 100% of its decreed rate [heuristic-strong]
• ASPEN DITCH (4000508) DWR↗☆ stopped 2024-04-21 (18+ days) — call at A. A. SMITH DITCH curtailing 100% of its decreed rate [heuristic-strong]
• CRAWFORD CLIPPER DITCH (4000500) DWR↗☆ stopped 2024-04-07 (6+ days) — call at ALBUSH DITCH curtailing 69% of its decreed rate [heuristic-partial]
• ANDERSON DITCH (4000507) DWR↗☆ stopped 2023-09-21 (216+ days) — call at MINNESOTA CANAL curtailing 100% of its decreed rate [heuristic-strong]
• FREEMAN DITCH NO 2 (4000547) DWR↗☆ stopped 2023-09-04 (17+ days) — call at DEER TRAIL 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
FRUITLAND CANAL (4000549) DWR↗☆	1901-05-17	6.3% / 0.0%	0.0% / 0.0%
FIRE MOUNTAIN CANAL (4001133) DWR↗☆	1896-09-14	8.2% / 0.0%	0.0% / 0.0%
COTTONWOOD CREEK ISF (4004193) DWR↗☆	2023-07-19	0.0% / 0.0%	0.0% / 0.0%
CRAWFORD CLIPPER DITCH (4000500) DWR↗☆	1885-10-19	12.6% / 0.0%	0.0% / 0.0%
OVERLAND DITCH (TERROR CREEK) (4001739) DWR↗☆	1893-08-01	6.3% / 0.0%	0.0% / 0.0%
SMITH FORK FEEDER CANAL (4000605) DWR↗☆	1946-09-03	0.0% / 0.0%	0.0% / 0.0%
ASPEN CANAL (4000509) DWR↗☆	1946-09-03	0.0% / 0.0%	0.0% / 0.0%
SURFACE CREEK DITCH (WARD) (4000661) DWR↗☆	1886-07-26	12.6% / 0.0%	0.0% / 0.0%
LEROUX CREEK DITCH (4000926) DWR↗☆	1883-08-11	31.3% / 0.0%	0.0% / 0.0%
OVERLAND DITCH (LEROUX CREEK) (4000944) DWR↗☆	1883-08-11	31.3% / 0.0%	0.0% / 0.0%
GRANDVIEW CANAL (4000503) DWR↗☆	1895-03-28	6.3% / 0.0%	0.0% / 0.0%
ALFALFA DITCH (4000751) DWR↗☆	1881-12-17	71.3% / 10.7%	0.0% / 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 ~1970 — idleness that begins before then may be unreported use, not nonuse (flagged † below).

• TUCKER DITCH & W WHEEL (4001261) DWR↗☆ (1899-04-01, 2.0 cfs decreed): last active 1970 — 54 years idle
• JAMES KENNICOTT W SIDE D (4001405) DWR↗☆ (1888-05-15, 1.0 cfs decreed): last active 1971 — 53 years idle
• WOMACK RESERVOIR NO. 3 (4003548) DWR↗☆ (1898-08-26, 0.0 cfs decreed): last active 1971 — 53 years idle
• PICKETT CORRAL DITCH (4000897) DWR↗☆ (1919-04-15, 1.1 cfs decreed): last active 1972 — 52 years idle
• WILBANKS DITCH (4001285) DWR↗☆ (1884-04-01, 0.5 cfs decreed): last active 1972 — 52 years idle
• ROCK DITCH (4000597) DWR↗☆ (1890-07-01, 3.2 cfs decreed): last active 1973 — 51 years idle
• WELL DITCH (4000618) DWR↗☆ (1890-07-01, 3.9 cfs decreed): last active 1973 — 51 years idle
• COTTONWOOD DITCH (4000635) DWR↗☆ (1912-04-01, 0.5 cfs decreed): last active 1973 — 51 years idle
• JEFFERS GULCH W W DITCH (4001283) DWR↗☆ (1896-04-01, 4.0 cfs decreed): last active 1973 — 51 years idle
• CEDAREDGE FISH HATCHERY (4001502) DWR↗☆ (1921-01-01, 2.0 cfs decreed): last active 1973 — 51 years idle

Compliance screens (477 advisory flags)

Screened 841 of 4661 structures with rights (1031 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.

• BONA FIDE DITCH (4000863) DWR↗☆: Observed p99 daily rate 73.6 cfs (max 80.0) exceeds total decreed absolute 65.0 cfs across 25375 recorded day(s).
• RELIEF DITCH (4000900) DWR↗☆: Observed p99 daily rate 69.8 cfs (max 80.0) exceeds total decreed absolute 51.0 cfs across 25459 recorded day(s).
• NORTH DELTA CANAL (4000891) DWR↗☆: Observed p99 daily rate 63.9 cfs (max 72.2) exceeds total decreed absolute 51.2 cfs across 22450 recorded day(s).
• HARTLAND DITCH (4000879) DWR↗☆: Observed p99 daily rate 60.0 cfs (max 90.0) exceeds total decreed absolute 47.4 cfs across 23839 recorded day(s).
• SURFACE CREEK DITCH (KISER) (4000662) DWR↗☆: Observed p99 daily rate 50.0 cfs (max 100.0) exceeds total decreed absolute 10.4 cfs across 34119 recorded day(s).
• STULL DITCH (4000942) DWR↗☆: Observed p99 daily rate 48.5 cfs (max 68.0) exceeds total decreed absolute 10.8 cfs across 26349 recorded day(s).
• STELL BUTTES ENLG DITCH (4000820) DWR↗☆: Observed p99 daily rate 46.0 cfs (max 83.2) exceeds total decreed absolute 25.0 cfs across 30296 recorded day(s).
• NORTH DELTA CANAL (FROM TONGUE CREEK) (4000730) DWR↗☆: Observed p99 daily rate 45.0 cfs (max 100.0) exceeds total decreed absolute 30.0 cfs across 18430 recorded day(s).
• FIRE MT CANAL (4001810) DWR↗☆: Observed p99 daily rate 43.0 cfs (max 43.0) exceeds total decreed absolute 40.0 cfs across 248 recorded day(s).
• NORTH FORK FARMERS D (4001185) DWR↗☆: Observed p99 daily rate 34.5 cfs (max 1560.0) exceeds total decreed absolute 32.1 cfs across 21606 recorded day(s).

Seniority (top structures by decreed rate)

Structure	Senior priority date	Rights	Decreed abs (cfs)	Decreed abs (AF)	Conditional?
FRUITLAND CANAL (4000549) DWR↗☆	1901-05-17	4	537.1	0	—
FIRE MOUNTAIN CANAL (4001133) DWR↗☆	1896-09-14	6	238.0	0	yes
COTTONWOOD CREEK ISF (4004193) DWR↗☆	2023-07-19	1	183.0	0	—
CRAWFORD CLIPPER DITCH (4000500) DWR↗☆	1885-10-19	15	164.3	0	—
ASPEN CANAL (4000509) DWR↗☆	1946-09-03	1	150.0	0	—
SMITH FORK FEEDER CANAL (4000605) DWR↗☆	1946-09-03	3	150.0	0	yes
OVERLAND DITCH (TERROR CREEK) (4001739) DWR↗☆	1893-08-01	2	150.0	0	—
SURFACE CREEK DITCH (WARD) (4000661) DWR↗☆	1886-07-26	6	117.3	0	—
LEROUX CREEK DITCH (4000926) DWR↗☆	1883-08-11	27	114.8	0	—
OVERLAND DITCH (LEROUX CREEK) (4000944) DWR↗☆	1883-08-11	30	107.7	0	—
GRANDVIEW CANAL (4000503) DWR↗☆	1895-03-28	3	90.5	0	—
ALFALFA DITCH (4000751) DWR↗☆	1881-12-17	5	87.2	3400	—
SADDLE MT HIGHLINE D (4000502) DWR↗☆	1897-05-01	7	83.7	0	—
STEWART DITCH (4001206) DWR↗☆	1882-06-01	6	82.0	0	—
OVERLAND DITCH (HUBBARD CREEK) (4001740) DWR↗☆	1893-08-01	1	75.0	0	—

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

Water-court filings this month (division-wide)

7 applications in the 2026-07 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 2026-09-30 (30 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 7 filings, with excerpts

Case	What it asks	County	Excerpt
2026CW3030	reasonable diligence, make absolute	DELTA	Case No. 2026CW3030 (Ref No. 19CW3044, 12CW89) DELTA COUNTY 1. Applicant: Daniel J. Thomas, 14976 Deer Run Rd. Delta, CO 81416-9171; (970) 209-1656 c/o Camp & Skarka, LLC, 415 Palmer St., Delta, CO 81416. APPLICATION TO MAKE ABSOLUTE IN PART, AND FOR FINDING O…
25CW3085	new storage right	DELTA	Case No. 25CW3085. DELTA COUNTY. GUNNISON RIVER OR ITS TRIBUTARIES. Columbine Family Ranch LLC, c/o Corona Water Law, 218 E. Valley Road #104 PMB 166, Carbondale, CO 91623, (970) 948 -6523, cc@craigcoronalaw.com. APPLICATION FOR WATER STORAGE RIGHTS. Reservoir…
26CW18	make absolute	—	Case No. 26CW18 (Ref No. 20CW2) Applicant Stewart Sto rms 708 Agape Circle Rockwall TX, 75087 Application to make Absolute. Storms Pump - Section15 T15S R84W Easting 346460 Northing 4290042. Source: Spring Creek . Date of Appropriation: December 1, 1953. Amoun…
26CW3031	plan for augmentation, new underground right	DELTA	Case No. 26CW3031, DELTA COUNTY, NORTH FORK OF THE GUNNISON AND GUNNISON RIVERS. Application for Conditional Underground Water Right, Approval of Plan for Augmentation and Conditional Exchange Project Right. Anastasia Suderman and Bryce Frazee, c/o Ryan Jarvis…
26CW3033	—	—	Case No. 26CW 3033 (Ref No. CA 2710; 20CW3017) Name, Address, and Telephone Number of Applicant. JBARM, Inc. (JBARM), c/o Andrew Bowles, 200 W. Nationwide Boulevard, Columbus, Ohio 43215; (614) 436 -2418. Please direct communications related to this applicatio…
26CW3034	—	DELTA	Case No. 26CW3034 (Ref 91CW0007) Delta County - Gunnison River; Town of Cedaredge; c/o John R. Pierce, DUFFORD WALDECK, 744 Horizon Court, Suite 300, Grand Junction, CO 81506, (970) 248-5865; APPLICATION FOR DETERMINATION OF WATER RIGHT (SURFACE); Name, addres…
26CW3035 2801276 2801277	reasonable diligence	GUNNISON	Case No. 26CW3035 (Ref No. 19CW3011) GUNNISON COUNTY. Fossil Creek Mines LLC, c/o Joseph Harrington, 8400 E. Prentice Avenue, Suite 1500, Greenwood Village, 80111. Please address all correspondence to: Peter D. Nichols, Esq., Katherine Carter, Esq., Berg Hill …

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
BSG WEST GRAVEL PIT	37-90-137(11) GRAVEL PIT PLAN	Approved	—	—	plan file
TRI-COUNTY GRAVEL PIT	37-90-137(11) GRAVEL PIT PLAN	Approved	—	—	plan file
SHADE LLC	37-92-308(4) PLAN PENDING COURT APPLICATION	Pending	—	—	plan file
HONEY ROCK UNDERDRAIN WELL (25CW3042)	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.

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