Piedra River Basin

Evolution of the network

This year, in context

In the weeks around 2026-07-06 (the newest reading on file), flows at the 1 ranked gage are running at a median 10% of their own long-term norm for this window — 1 below a typical year, 0 at or above. Driest relative to its record: SOUTH RIVER PEAK DITCH, ranking 2nd lowest of 4 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 21:22 from 10 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.

None of the 10 gages with enough record shows a significant trend or a detected shift — which is itself the finding.

No gage shows a statistically significant trend or changepoint yet.

10 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. 2 gage(s) and 58 structure(s) report in 2026, but structure reporting only reached half its modern level around ~1974. 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)
1930s	3	0
1940s	4	0
1950s	2	0
1960s	2	32
1970s	2	67
1980s	1	86
1990s	2	88
2000s	2	94
2010s	2	62
2020s	2	58

Mass-balance (network closure) trend

Structure divrec-history backfill coverage as of the last check: 17% of 249 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: 44 monitored well(s), water-table trends, stream corridors, and the advisory depletion screen.

Reservoirs now has its own tab: 28 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.

28 reservoir(s) with 5,424 storage measurement(s), 1970–2024. Basin storage as of 2023-10-31 (the record's own end — reservoir records publish ~annually): 14,465 AF across 8 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)
▸ WILLIAMS CREEK RESERVOIR (7803642) ☆	8,482	2023-10-31	—	—	dossier →
▸ STEVENS RESERVOIR DAM (7803645) ☆	1,825	2022-10-31	—	—	dossier →
▸ G S HATCHER RESERVOIR (7803626) ☆	1,635	2022-10-31	—	—	dossier →
▸ LINN AND CLARK RESERVOIR (7803629) ☆	1,239	2022-10-31	—	—	dossier →
▸ TOWN CENTER LAKE (7803646) ☆	641	2022-10-31	—	—	dossier →
▸ LAKE FOREST (7803644) ☆	452	2022-10-31	—	—	dossier →
▸ PARGIN RESERVOIR (7803633) ☆	337	2011-10-31	—	—	dossier →
▸ PINON LAKE (7803636) ☆	125	2022-10-31	—	—	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
Weminuche Creek	10730	0.0	0.0	—	March 28 (16.4 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 (2011–2026)

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 4 of the last 16 winters the snow never came — the pack peaked below 80% of its median. In 1 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 53% of median.

The snow never came: 2018, 2022, 2025, 2026. The snow left early: 2012.

Computed by this site from 1 SNOTEL site’ full daily records (NRCS AWDB, back to 2011). 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 — Piedra R nr Arboles

NRCS's final issue (2026-06-01) calls it even odds that at least 14 kAF arrives over 06-01 to 07-31 — 24% of a normal season; almost certainly at least 6, probably not more than 40. Our own record at this gage shows 6 kAF actually delivered (partial record: 17 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 58 replayed seasons (16% typical miss unadjusted vs 14% 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
6	10	14	25	40	58	6

How good are these forecasts here? (1963–2025)

Grading every April issue against what the river then delivered, measured at this gage’s own record — 62 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 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 (2011–2025)

Across 15 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 62% 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 1.0). In warm, early-melt years the river delivered a median of 59% of a normal season, against 92% in typical years — the timing of the melt matters, not just its size.

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 7th-driest week 24 in 64 years of record at PIEDRA RIVER NEAR ARBOLES, CO. (as of 2026-06-08; this week’s flow sits at the 11th percentile for the date). On this week’s US Drought Monitor, Hinsdale County is 27% in D4 exceptional drought (2026-08-25). The law agrees: the most senior active call leaves 96% of this district’s decreed flow rights junior to the calling right this week.

Every year since 1962, week by week

Each thin row is a year at PIEDRA RIVER NEAR ARBOLES, 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 Archuleta, Hinsdale, Mineral 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 2002 — 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 (25 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	2025-04-28 → 2026-01-26	39	11th (2025-09-01)	1 week
unnamed dry spell	2023-11-20 → 2024-10-14	47	13th (2024-01-22)	68 weeks
the 2020-22 drought	2020-04-06 → 2022-10-03	130	8th (2021-03-15)	21 weeks
the 2018 drought	2018-01-29 → 2019-06-17	72	5th (2018-10-01)	1 week
the 2012-13 drought	2012-09-17 → 2013-10-21	57	13th (2013-01-14)	0 weeks
unnamed dry spell	2009-11-30 → 2010-06-07	27	22nd (2010-02-08)	9 weeks
the 2002 drought	2001-12-31 → 2004-03-15	115	2nd (2002-09-02)	14 weeks
unnamed dry spell	2000-08-28 → 2001-02-05	23	24th (2000-10-16)	7 weeks
unnamed dry spell	1996-04-01 → 1996-12-23	38	19th (1996-08-19)	6 weeks
unnamed dry spell	1989-12-18 → 1990-09-03	37	11th (1990-04-16)	0 weeks
the 1981 drought	1981-04-13 → 1981-10-05	25	23rd (1981-06-29)	2 weeks
the 1977 drought	1977-02-28 → 1978-02-06	49	5th (1977-06-20)	61 weeks
unnamed dry spell	1974-04-22 → 1975-05-05	54	19th (1974-09-30)	6 weeks
unnamed dry spell	1968-02-12 → 1968-07-29	24	18th (1968-03-25)	1 week

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.

When this basin claimed its water

Every bar is a year’s new appropriations (173 rights across 65 years of shared record), colored by that year’s wetness from the barcode above. Here the correlation is +0.1 — 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 1868-03-02 to 2025-06-27. Of the 20 structures with a yield estimate, the median one’s senior right was in priority 2% of a median irrigation season and 0% in a dry one. 25 abandonment screens and 85 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: 435 across 366 structure(s); 64 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	319	117	1883-05-15
2015	316	90	1899-05-13
2016	273	94	1888-02-08
2017	297	98	1904-01-02
2018	285	164	1878-05-15
2019	186	53	1880-06-01
2020	240	171	1986-11-23
2021	246	143	1876-11-01
2022	261	161	1888-03-20
2023	198	82	1880-06-01
2024	231	114	1876-10-10
2025	281	169	1888-03-20

Why diversions stopped — call-based explanations

Sustained diversion stops matched to senior administrative calls.

• FARROW AND PETERSON D (7800545) DWR↗☆ stopped 2025-09-17 (44+ days) — call at HENRY BOLEN DITCH curtailing 100% of its decreed rate [heuristic-strong]
• CARL AND WEBB DITCH (7800523) DWR↗☆ stopped 2025-09-15 (46+ days) — call at HENRY BOLEN DITCH curtailing 100% of its decreed rate [heuristic-strong]
• F S MOCKLER IRR DITCH (7800544) DWR↗☆ stopped 2025-09-04 (57+ days) — call at SPRING CREEK DITCH curtailing 100% of its decreed rate [heuristic-strong]
• BIG PAGOSA DITCH (7800510) DWR↗☆ stopped 2025-09-01 (60+ days) — call at HENRY BOLEN DITCH curtailing 100% of its decreed rate [heuristic-strong]
• BARNES-MEUSER AND SHAW D (7800507) DWR↗☆ stopped 2025-08-24 (68+ days) — call at HENRY BOLEN DITCH curtailing 100% of its decreed rate [heuristic-strong]
• HOSSACK CREEK DITCH (7800562) DWR↗☆ stopped 2025-08-24 (68+ days) — call at HENRY BOLEN DITCH curtailing 100% of its decreed rate [heuristic-strong]
• BURKHARD DITCH (7800515) DWR↗☆ stopped 2025-08-06 (86+ days) — call at HENRY BOLEN DITCH curtailing 100% of its decreed rate [heuristic-strong]
• GRIMES DITCH (7800557) DWR↗☆ stopped 2025-08-06 (86+ days) — call at HENRY BOLEN DITCH curtailing 100% of its decreed rate [heuristic-strong]
• J C R DITCH (7800565) DWR↗☆ stopped 2025-08-03 (14+ days) — call at HENRY BOLEN DITCH curtailing 100% of its decreed rate [heuristic-strong]
• GALLEGOS HOME DITCH (7800552) DWR↗☆ stopped 2025-07-10 (12+ days) — call at HENRY BOLEN DITCH curtailing 100% of its decreed rate [heuristic-strong]
• BENNETT DITCH (7800509) DWR↗☆ stopped 2025-07-09 (114+ days) — call at HENRY BOLEN DITCH curtailing 100% of its decreed rate [heuristic-strong]
• DYKE NO 1 DITCH (7800539) DWR↗☆ stopped 2025-06-27 (59+ days) — call at HENRY BOLEN 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
PIEDRA RIVER MIN FLOW (7801910) DWR↗☆	1979-03-14	2.3% / 0.0%	2.3% / 0.0%
PIEDRA RIVER MIN FLOW (7801903) DWR↗☆	1978-03-16	2.3% / 0.0%	2.3% / 0.0%
PIEDRA RIVER MIN FLOW (7801902) DWR↗☆	1978-03-16	2.3% / 0.0%	2.3% / 0.0%
PIEDRA RIVER MIN FLOW (7801901) DWR↗☆	1978-03-16	2.3% / 0.0%	2.3% / 0.0%
LINN AND CLARK DITCH (7800578) DWR↗☆	1902-06-14	4.4% / 0.0%	4.4% / 0.0%
PIEDRA RIVER MIN FLOW (7801900) DWR↗☆	1978-03-16	2.3% / 0.0%	2.3% / 0.0%
PIEDRA FALLS DITCH (7800604) DWR↗☆	1934-07-18	2.3% / 0.0%	2.3% / 0.0%
LITTLE PAGOSA CREEK DIVR (7800659) DWR↗☆	1939-12-31	2.3% / 0.0%	2.3% / 0.0%
BARNES-MEUSER AND SHAW D (7800507) DWR↗☆	1903-12-31	2.3% / 0.0%	2.3% / 0.0%
BUCKSKIN-NAILOR DITCH (7800513) DWR↗☆	1900-03-20	19.8% / 0.0%	2.3% / 0.0%
PERKINS DITCH - STOLLSTEIMER CREEK (7800600) DWR↗☆	1963-07-28	2.3% / 0.0%	2.3% / 0.0%
WEMINUCHE CR MIN FLOW (7801909) DWR↗☆	1978-03-16	2.3% / 0.0%	2.3% / 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 ~1974 — idleness that begins before then may be unreported use, not nonuse (flagged † below).

• STEVENS SPRING (7800735) DWR↗☆ (1999-04-10, 0.0 cfs decreed): last active 1968 — 57 years idle † predates modern reporting era — last recorded activity predates this basin's modern reporting era (~1974) -- early absence of record is weak evidence of nonuse
• BUCY WATER LINE (7800514) DWR↗☆ (1963-07-07, 0.0 cfs decreed): last active 1970 — 55 years idle † predates modern reporting era — last recorded activity predates this basin's modern reporting era (~1974) -- early absence of record is weak evidence of nonuse
• HERSCH DITCH (7800561) DWR↗☆ (1949-08-01, 8.0 cfs decreed): last active 1970 — 55 years idle † predates modern reporting era — last recorded activity predates this basin's modern reporting era (~1974) -- early absence of record is weak evidence of nonuse
• MARTIN SPG D AND PL NO 1 (7800581) DWR↗☆ (1928-07-15, 1.0 cfs decreed): last active 1974 — 51 years idle
• PIEDRA STATION PIPE LINE (7800606) DWR↗☆ (1913-10-01, 0.1 cfs decreed): last active 1974 — 51 years idle
• SANDFORD WATERLINE (7800615) DWR↗☆ (1968-09-01, 0.0 cfs decreed): last active 1974 — 51 years idle
• YELLOW JACKET PIPE LINE (7800651) DWR↗☆ (1912-06-10, 0.1 cfs decreed): last active 1974 — 51 years idle
• LINN AND CLARK RESERVOIR (7803629) DWR↗☆ (1902-06-14, 0.0 cfs decreed): last active 1974 — 51 years idle
• J B MARTINEZ DITCH (7800564) DWR↗☆ (1883-06-14, 1.2 cfs decreed): last active 1975 — 50 years idle
• TRES PIEDRAS DITCH (7800639) DWR↗☆ (1943-10-01, 2.0 cfs decreed): last active 1975 — 50 years idle

Compliance screens (85 advisory flags)

Screened 118 of 366 structures with rights (139 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.

• PIEDRA FALLS DITCH (7800604) DWR↗☆: Observed p99 daily rate 26.1 cfs (max 33.0) exceeds total decreed absolute 26.0 cfs across 25808 recorded day(s).
• GORDON CREEK WETLANDS DIVERSION DITCH (7800756) DWR↗☆: Observed p99 daily rate 20.0 cfs (max 20.0) exceeds total decreed absolute 4.0 cfs across 1681 recorded day(s).
• FARROW AND PETERSON D (7800545) DWR↗☆: Observed p99 daily rate 18.4 cfs (max 23.3) exceeds total decreed absolute 16.6 cfs across 26551 recorded day(s).
• J B MARTINEZ DITCH (7800564) DWR↗☆: Observed p99 daily rate 17.0 cfs (max 20.0) exceeds total decreed absolute 1.2 cfs across 322 recorded day(s).
• CIMARRON DITCH (7800524) DWR↗☆: Observed p99 daily rate 15.0 cfs (max 15.0) exceeds total decreed absolute 5.0 cfs across 7748 recorded day(s).
• G S HATCHER DITCH (7800550) DWR↗☆: Observed p99 daily rate 15.0 cfs (max 16.8) exceeds total decreed absolute 7.5 cfs across 1550 recorded day(s).
• M E AND M DITCH (7800580) DWR↗☆: Observed p99 daily rate 14.4 cfs (max 21.0) exceeds total decreed absolute 12.0 cfs across 15526 recorded day(s).
• CLAYTON-REED DITCH (7800525) DWR↗☆: Observed p99 daily rate 13.0 cfs (max 13.1) exceeds total decreed absolute 10.0 cfs across 19001 recorded day(s).
• HOSSACK CREEK DITCH (7800562) DWR↗☆: Observed p99 daily rate 13.0 cfs (max 24.7) exceeds total decreed absolute 10.0 cfs across 10971 recorded day(s).
• J C R DITCH (7800565) DWR↗☆: Observed p99 daily rate 12.9 cfs (max 19.0) exceeds total decreed absolute 10.0 cfs across 6994 recorded day(s).

Seniority (top structures by decreed rate)

Structure	Senior priority date	Rights	Decreed abs (cfs)	Decreed abs (AF)	Conditional?
PIEDRA RIVER MIN FLOW (7801903) DWR↗☆	1978-03-16	1	70.0	0	—
PIEDRA RIVER MIN FLOW (7801910) DWR↗☆	1979-03-14	1	70.0	0	—
PIEDRA RIVER MIN FLOW (7801902) DWR↗☆	1978-03-16	1	53.0	0	—
PIEDRA RIVER MIN FLOW (7801901) DWR↗☆	1978-03-16	1	44.0	0	—
LINN AND CLARK DITCH (7800578) DWR↗☆	1902-06-14	1	36.5	0	—
PIEDRA RIVER MIN FLOW (7801900) DWR↗☆	1978-03-16	1	30.0	0	—
PIEDRA FALLS DITCH (7800604) DWR↗☆	1934-07-18	2	26.0	0	yes
LITTLE PAGOSA CREEK DIVR (7800659) DWR↗☆	1939-12-31	1	26.0	0	—
BARNES-MEUSER AND SHAW D (7800507) DWR↗☆	1903-12-31	3	22.5	0	—
BUCKSKIN-NAILOR DITCH (7800513) DWR↗☆	1900-03-20	7	21.9	0	—
PERKINS DITCH - STOLLSTEIMER CREEK (7800600) DWR↗☆	1963-07-28	1	20.0	0	—
ABRAHAM DAVIS DITCH (7800501) DWR↗☆	1900-04-01	4	18.0	0	—
WEMINUCHE CR MIN FLOW (7801909) DWR↗☆	1978-03-16	1	18.0	0	—
FARROW AND PETERSON D (7800545) DWR↗☆	1879-04-10	6	16.6	0	—
F S MOCKLER IRR DITCH (7800544) DWR↗☆	1901-10-01	1	15.0	0	—

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

Water-court filings this month (division-wide)

4 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 4 filings, with excerpts

Case	What it asks	County	Excerpt
2026CW3007 3001335	change of water right	LA PLATA	2026CW3007 La Plata County, AMENDED APPLICATION FOR CHANGE OF WATER RIGHT AND NEW WATER RIGHTS. 1. Name and address of Applicants : Gilleland Enterprises, LLC and C&J Gravel Products, Inc. (“Applicants”)c/o John Gilleland 27661 Highway 160 Durango, CO 81301 jo…
2026CW3016	reasonable diligence	LA PLATA	2026CW3016 La Plata County, Application for Finding of Reasonable Diligence in the Florida River Watershed; Prior case no. 18CW3047: Applicant: The Bingel-Davis Gratitude Trust, u/a dated April 17, 2025, c/o Kimberly C. Perdue, Southwest Water and Property Law…
2026CW3017	—	LA PLATA	2026CW3017 La Plata County, (20CW3008, 13CW3027, 05CW90)…
2026CW4	—	ARCHULETA	2026CW4 Archuleta County, Jess E. Ketchum, 320 Stevens Lake Road, Pagosa Springs, CO 81147: Watson Reservoir (Reservoir Pump); Located in the SW 1/4 SE 1/4 of Section 5, T35N, R2W, NMPM, the axis intersects the East abutment at a point approximately 875 ft. No…

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
KEYAH GRANDE RANCH - BARB'S WELL	37-92-308(4) PLAN PENDING COURT APPLICATION	Decreed	2025-10-31	—	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
Simulate

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