San Luis Creek

Division 3 · Water District 25

Auto-mapped

San Luis Creek on the ground — the ditches, wells, reservoirs and gages of Water District 25 · 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.

3% of normal flow, week of 2026-06-29

9 calls active on it right now

The Crestone Creek, North is critically low for late June -- 3% of normal flow, its 3rd-driest such week in 91 years of record. 9 calls stand against it right now; the most senior right calling dates to 1860.

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 14 ranked gages are running at a median 23% of their own long-term norm for this window — 13 below a typical year, 1 at or above. Driest relative to its record: SOUTH CRESTONE CREEK NEAR CRESTONE, ranking 3rd lowest of 28 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 19:50 from 20 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 20 gages with enough record, 0 are trending down and 0 up, and 1 carries a detected shift. The other 19 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
▸ ⚠️ Major Creek near Villa Grove MAJVILCO	no clear trend	+0.14 cfs +18.8%	p=0.095	27	~2006

⚠️ 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.

19 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. 14 gage(s) and 99 structure(s) report in 2026, but structure reporting only reached half its modern level around ~1969. 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)
1920s	1	0
1930s	2	0
1940s	2	0
1950s	2	44
1960s	2	56
1970s	2	74
1980s	4	95
1990s	2	74
2000s	13	116
2010s	14	118
2020s	13	99

Mass-balance (network closure) trend

Structure divrec-history backfill coverage as of the last check: 20% of 586 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 (1951–2026)

Mass-balance kinks computed for every summer month back to 1951 (479 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: 206 monitored well(s), water-table trends, stream corridors, and the advisory depletion screen.

Cross-gage pattern fingerprint

Over the 28-year window with full coverage (1999–2026), the dominant shared pattern across 8 gage(s) explains 80% of year-to-year variance (almost certainly a basin-wide climate/snowpack driver).

MAJVILCO doesn't move with that shared pattern -- a real, localized signal (a new diversion, land-use change, or a gage-specific data problem) worth a closer look, not necessarily noise.

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 304 day(s) old (DWR publishes ~1 year in arrears)
structure coverage	sparse	20% of schematic structures have data

Independent check: PASS — 100.0000% agreement across 102,978 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 — 100.00% day-level agreement with USGS's own published records for the same gages, across 8 co-listed station(s) and 47,071 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.

20 gage(s) / 185,204 daily values (1923-06-01–2026-07-06); 203 structure(s) with diversion records; 847 with decreed rights. Methodology has not yet had independent expert review — treat every figure as an advisory screen, not an administrative or legal conclusion.

19,132 water-level measurements across 206 monitored well(s) — 70 alluvial, 62 bedrock — plus 1 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 71 well(s) with enough record for a trend test: 37 declining, 5 rising.

Fastest-declining wells	Setting	ft / decade	Span	p
▸ NA04101003AAA2 EW-46C	alluvial	-7.66	11 yr	0.002
▸ NA04001106DAD EW-71C	alluvial	-4.27	26 yr	0.0145
▸ BACA-2	unknown	-4.16	19 yr	0.0
▸ NA04201027DAD2 EW-52C	alluvial	-3.94	11 yr	0.0203
▸ NA04501007CCA RG02	unknown	-3.26	46 yr	0.0048
▸ NA04101013ABD1 EW-79C	alluvial	-3.25	35 yr	0.0266
▸ NA04301028BBB2 EW-62C	unknown	-2.83	11 yr	0.0001
▸ NA04101002ABA RG24A	alluvial	-2.81	45 yr	0.0001

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.

Right now

This is the 3rd-driest week 27 in 91 years of record at CRESTONE CREEK, NORTH NEAR CRESTONE (as of 2026-06-29; this week’s flow sits at the 3rd percentile for the date). On this week’s US Drought Monitor, Saguache County is 40% in D4 exceptional drought (2026-09-01). The law agrees: the most senior active call leaves 98% of this district’s decreed flow rights junior to the calling right this week.

Every year since 1936, week by week

Each thin row is a year at CRESTONE CREEK, NORTH NEAR CRESTONE; 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 Saguache county — 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 2014 — 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 (256 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
the 2020-22 drought	2021-12-20 → 2022-10-03	41	15th (2022-03-07)	10 weeks
the 2020-22 drought	2020-07-06 → 2021-07-05	52	10th (2020-12-14)	4 weeks
the 2020-22 drought	2020-01-13 → 2020-06-22	23	25th (2020-02-24)	58 weeks
the 2018 drought	2018-04-02 → 2019-08-19	72	1st (2018-11-19)	102 weeks
the 2012-13 drought	2012-10-01 → 2013-10-28	56	6th (2013-04-22)	0 weeks
the 2012-13 drought	2010-11-08 → 2012-01-23	63	13th (2011-08-22)	10 weeks
unnamed dry spell	2009-12-21 → 2010-07-26	31	17th (2010-02-15)	88 weeks
unnamed dry spell	2009-02-16 → 2009-07-06	20	22nd (2009-04-13)	2 weeks
unnamed dry spell	2006-05-08 → 2006-10-09	22	23rd (2006-06-26)	0 weeks
the 2002 drought	2002-02-11 → 2003-08-11	78	3rd (2002-10-21)	39 weeks
unnamed dry spell	2000-10-09 → 2001-07-02	38	17th (2000-11-20)	4 weeks
unnamed dry spell	1978-10-09 → 1979-04-30	29	18th (1979-01-01)	4 weeks
the 1963-64 drought	1963-07-08 → 1964-10-12	66	7th (1964-05-04)	0 weeks
unnamed dry spell	1962-10-22 → 1963-05-06	28	21st (1962-11-12)	75 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 2018, federal crop insurance has paid $16,321 in drought-caused claims across Saguache county — 0.0% of all insured crop losses there. The worst year was 2018 ($16,321).

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 (402 rights across 91 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 1866-04-01 to 2012-01-24. Of the 20 structures with a yield estimate, the median one’s senior right was in priority 53% of a median irrigation season and 0% in a dry one. 25 abandonment screens and 107 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: 1024 across 847 structure(s); 142 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 1969–2025, administration on this district has been tightening: 3 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 (57 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	61	8	1870-03-01
2015	365	373	1854-03-31
2016	366	344	1850-01-01
2017	365	307	1855-04-30
2018	365	427	1855-06-01
2019	365	547	1850-01-01
2020	366	523	1854-03-31
2021	365	533	1854-03-31
2022	365	291	1854-03-31
2023	365	136	1854-03-31
2024	366	105	1854-03-31
2025	365	117	1854-03-31

Why diversions stopped — call-based explanations

Sustained diversion stops matched to senior administrative calls.

CHARLES D (2500534) DWR↗ stopped 2025-08-19 (27+ days) — call at RIO GRANDE COMPACT - LOBATOS curtailing 100% of its decreed rate [heuristic-strong]
CHARLES D (2500534) DWR↗ stopped 2024-10-29 (182+ days) — call at RIO GRANDE COMPACT - LOBATOS curtailing 100% of its decreed rate [heuristic-strong]
ALDER CR D (2500502) DWR↗ stopped 2024-09-03 (336+ days) — call at RIO GRANDE COMPACT - LOBATOS curtailing 100% of its decreed rate [heuristic-strong]
CLAYTON OLD CHANNEL DITC (2500557) DWR↗ stopped 2024-06-30 (26+ days) — call at RIO GRANDE COMPACT - LOBATOS [heuristic-partial]

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
COTTONWOOD CR D (2500550) DWR↗	1870-05-10	53.3% / 0.0%	53.3% / 0.0%
USFS QP55A1 (2500920) DWR↗	1902-04-11	5.6% / 0.0%	5.6% / 0.0%
HOFFMAN NEIDHARDT D (2500698) DWR↗	1868-03-15	54.7% / 0.0%	6.3% / 0.0%
WILLOW CR D (2500684) DWR↗	1870-05-10	53.3% / 0.0%	53.3% / 0.0%
BACA GRANT 4 IRR D 12 (2500516) DWR↗	1870-05-01	53.3% / 0.0%	25.0% / 0.0%
BACA GRANT 4 IRR D 19 (2500518) DWR↗	1870-05-10	53.3% / 0.0%	53.3% / 0.0%
BACA GRANT 4 IRR D 10 (2500514) DWR↗	1870-07-01	53.3% / 0.0%	11.9% / 0.0%
BACA GRANT 4 IRR D 9 (2500513) DWR↗	1870-05-01	53.3% / 0.0%	11.9% / 0.0%
BACA GRANT 4 IRR D 24 (2500520) DWR↗	1870-05-10	53.3% / 0.0%	11.9% / 0.0%
WALES SHELLABARGER D 2 (2500678) DWR↗	1870-07-01	53.3% / 0.0%	13.6% / 0.0%
USFS QP53H2 (2500915) DWR↗	1902-04-11	5.6% / 0.0%	5.6% / 0.0%
USFS QP53G6 (2500913) DWR↗	1902-04-11	5.6% / 0.0%	5.6% / 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 ~1969 — idleness that begins before then may be unreported use, not nonuse (flagged † below).

BARSCH D 1 (2500528) DWR↗ (1881-04-15, 1.6 cfs decreed): last active 1961 — 64 years idle † predates modern reporting era — last recorded activity predates this basin's modern reporting era (~1969) -- early absence of record is weak evidence of nonuse
HOFFMAN D 2 (2500604) DWR↗ (1875-05-01, 0.9 cfs decreed): last active 1961 — 64 years idle † predates modern reporting era — last recorded activity predates this basin's modern reporting era (~1969) -- early absence of record is weak evidence of nonuse
BACA GRANT 4 IRR D 19 (2500518) DWR↗ (1870-05-10, 39.8 cfs decreed): last active 1968 — 57 years idle † predates modern reporting era — last recorded activity predates this basin's modern reporting era (~1969) -- early absence of record is weak evidence of nonuse
BRALEY D (2500530) DWR↗ (1886-05-09, 1.4 cfs decreed): last active 1973 — 52 years idle
JOHN DECAMP D B (2500610) DWR↗ (1884-06-01, 0.6 cfs decreed): last active 1975 — 50 years idle
KAUFMAN D (2500611) DWR↗ (1883-05-10, 1.0 cfs decreed): last active 1980 — 45 years idle
DRISCOLL D (2500565) DWR↗ (1908-09-28, 1.8 cfs decreed): last active 1984 — 41 years idle
CEDAR CR D (2500533) DWR↗ (1910-03-01, 2.0 cfs decreed): last active 1986 — 39 years idle
NORTH,MIDDLE & TOP SPGS (2500743) DWR↗ (1871-05-01, 1.0 cfs decreed): last active 1989 — 36 years idle
DRISCOLL D 2 (2500566) DWR↗ (1909-04-15, 3.0 cfs decreed): last active 1990 — 35 years idle

Compliance screens (107 advisory flags)

Screened 145 of 847 structures with rights (151 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.

BACA GRANT 4 IRR D 9 (2500513) DWR↗: Observed p99 daily rate 70.0 cfs (max 90.6) exceeds total decreed absolute 39.0 cfs across 10906 recorded day(s).
BACA GRANT 4 IRR D 10 (2500514) DWR↗: Observed p99 daily rate 41.0 cfs (max 41.0) exceeds total decreed absolute 39.4 cfs across 1308 recorded day(s).
WALES SHELLABARGER D 2 (2500678) DWR↗: Observed p99 daily rate 37.5 cfs (max 54.0) exceeds total decreed absolute 37.0 cfs across 23396 recorded day(s).
SHELLABARGER HOME D 2 (2500651) DWR↗: Observed p99 daily rate 28.0 cfs (max 28.8) exceeds total decreed absolute 3.0 cfs across 476 recorded day(s).
STEEL D 2 (2500661) DWR↗: Observed p99 daily rate 21.5 cfs (max 37.8) exceeds total decreed absolute 7.6 cfs across 28637 recorded day(s).
BACA GRANT 4 IRR D 3 (2500507) DWR↗: Observed p99 daily rate 20.0 cfs (max 30.0) exceeds total decreed absolute 4.0 cfs across 5374 recorded day(s).
SAN ISABEL D (2500640) DWR↗: Observed p99 daily rate 20.0 cfs (max 35.0) exceeds total decreed absolute 19.8 cfs across 5168 recorded day(s).
BACA GRANT 4 IRR D 5 (2500509) DWR↗: Observed p99 daily rate 18.0 cfs (max 29.0) exceeds total decreed absolute 5.8 cfs across 3798 recorded day(s).
PETERSON D 1 (2500628) DWR↗: Observed p99 daily rate 18.0 cfs (max 50.0) exceeds total decreed absolute 14.9 cfs across 15772 recorded day(s).
BACA GRANT 4 IRR D 4 (2500508) DWR↗: Observed p99 daily rate 15.0 cfs (max 22.0) exceeds total decreed absolute 7.0 cfs across 8360 recorded day(s).

Seniority (top structures by decreed rate)

Structure	Senior priority date	Rights	Decreed abs (cfs)	Conditional?
COTTONWOOD CR D (2500550) DWR↗	1870-05-10	1	94.4	—
USFS QP55A1 (2500920) DWR↗	1902-04-11	1	90.2	—
HOFFMAN NEIDHARDT D (2500698) DWR↗	1868-03-15	12	69.1	—
WILLOW CR D (2500684) DWR↗	1870-05-10	1	69.0	—
BACA GRANT 4 IRR D 12 (2500516) DWR↗	1870-05-01	6	44.2	—
BACA GRANT 4 IRR D 19 (2500518) DWR↗	1870-05-10	1	39.8	—
BACA GRANT 4 IRR D 10 (2500514) DWR↗	1870-07-01	2	39.4	—
BACA GRANT 4 IRR D 9 (2500513) DWR↗	1870-05-01	2	39.0	—
BACA GRANT 4 IRR D 24 (2500520) DWR↗	1870-05-10	2	39.0	—
WALES SHELLABARGER D 2 (2500678) DWR↗	1870-07-01	6	37.0	—
USFS QP53H2 (2500915) DWR↗	1902-04-11	1	30.6	—
USFS QP53G6 (2500913) DWR↗	1902-04-11	1	28.8	—
ARTHUR YOUNG D (2500505) DWR↗	1876-04-01	2	28.0	—
JK HR COLE DR SPG WW D 1 (2500734) DWR↗	1952-08-20	1	25.7	—
BACA GRANT 4 IRR D 25 (2500521) DWR↗	1870-05-10	1	24.0	—

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

Water-court filings this month (division-wide)

2 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 2 filings, with excerpts

Case	What it asks	County	Excerpt
`2026CW5` 2505063	—	TRIBUTARIES IN SAGUACHE	Case No. 2026CW5: Applicant Kiana Creek Holdings II 3450 Big Bear Drive Sedalia, CO. 80135. jerry@kianacreekfarms.com (719) 588-0908. In the Rio Grande River or its Tributaries In Saguache County. APPLICATION FOR CORRECTION FOR AN ESTABLISHED BUT ERRONEOUSLY D…
`2026CW6`	change of water right	IN ALAMOSA	Case No. 2026CW6: Applicant KJRC Investments, LLC Splashland, LLC c/o Aaron and Tiffanie Polkowske 14099 County Road U La Jara, CO. 81140 no phone number, no email. In Alamosa County. APPLICATION FOR CHANGE OF WATER RIGHT Decreed water right for which change i…

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
SUBD 2 JANRICH TRANSMOUNTAIN	37-92-308(5) PLANS LESS THAN 5 YEARS	Approved	2027-04-30	—	plan file
BACA GRANT NO. 4 IRRIGATION DITCH NO. 3	37-92-308(5) PLANS LESS THAN 5 YEARS	Approved	—	—	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: 11 parent disagreements, 12 sizable streams not on this network (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 21 streams, 10 agree. Know this water? Tell us →

Stream	This site routes it to	DWR routes it to
Spring Creek	the mainstem	Owl Creek
Cottonwood Creek	the mainstem	Kerber Creek
Little Kerber Creek	the mainstem	Kerber Creek
Raspberry Creek (AKA Spring Creek)	the mainstem	Rock Creek
Major Creek	the mainstem	Garner Creek
Spring Creek	the mainstem	nan
North Crestone Creek	the mainstem	Crestone Creek
Willow Creek	the mainstem	nan

Sizable streams DWR maps here that this network does not carry:

Crestone Creek (15 mi) · Rock Creek (11 mi) · Steel Canyon Creek (7 mi) · Peterson Creek (7 mi) · Alder Creek (5 mi) · Lone Tree Creek (5 mi) · Hayden Pass Creek (5 mi) · Silver Creek (5 mi)

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