Arkansas: Las Animas to Stateline

Division 2 · Water District 67 · As of 2026-09-17 05:30 MDT · 4 weeks ago

Live · machine-built

Arkansas: Las Animas to Stateline on the ground — the ditches, wells, reservoirs and gages of Water District 67 · clicktap anything for its record

The well-permit cells in view, as a table

Each row is one ~1-mile cell (0.02°) with the permits the file spots inside it, split into water-supply permits and monitoring holes (DWR’s two monitoring categories: drilled to look at the water, not to pump it). These are permits, not wells: a permit is a piece of paper, and the file does not say which were drilled. Spotting is the file’s own, about a mile at best, which is why the cells are no finer.

Lat	Lon	Water-supply permits	Monitoring holes

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

85% of normal flow, week of 2026-09-21

2 calls the record places on it, 15 unsettled

The Arkansas River is near normal for late September -- 85% of normal flow. 2 calls stand against it right now; the most senior right calling dates to 1905. DWR's statements do not settle whether 15 more calls reach it.

Schematic

Historical

Reconstruct conditions as of

Evolution of the network

Trends

Source Our computation, no independent reference · computed here from the screened DWR record Source Our computation, no independent reference · no independent reference; see /methods

This year, in context

In the weeks around 2026-09-27 (the newest reading on file), flows at the 36 ranked gages are running at a median 62% of their own long-term norm for this window — 28 below a typical year, 8 at or above. Driest relative to its record: ARF HEADGATE 145 (HASTY), ranking 1st lowest of 10 years.

How this comparison is made

Each gage's mean flow over the 3 days either side of 2026-09-27, 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 2026-10-11 20:03 from 62 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 62 gages with enough record, 5 are trending down and 1 up, and 7 carry a detected shift. The clearest is Arkansas River at Garden City, Ks, its annual mean flow changing -12.07 cfs per decade (-23.5% of its median annual flow) over 86 years (p<0.0001). The other 53 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
▸ ⚠️ Arkansas River at Garden City, Ks ARKGARKS	↓ decreasing	-12.07 cfs -23.5%	p<0.001	86	~2001
▸ Arkansas River at Syracuse, Ks ARKSYRKS	↓ decreasing	-19.13 cfs -11.4%	p=0.002	107	~1967
▸ ⚠️ Center Farm Augmentation Station CEFAUGCO	↓ decreasing	-3.91 cfs -59.4%	p=0.002	20	~2011
▸ Hyde Ditch HYDDITCO	↑ increasing	+3.62 cfs +67.3%	p=0.017	16	—
▸ Arkansas River at Lamar ARKLAMCO	↓ decreasing	-5.29 cfs -6.2%	p=0.026	107	~1950
▸ Gageby Creek below Fort Lyon Canal GACBFLCO	↓ decreasing	-1.95 cfs -96.3%	p=0.030	19	—
▸ Arkansas River near Granada ARKGRACO	no clear trend	-17.33 cfs -17.1%	p=0.067	45	~2001
▸ Wild Horse Creek at Holly WILHOLCO	no clear trend	+3.26 cfs +28.4%	p=0.378	23	~1940
▸ Holly Drain near Holly HOLHOLCO	no clear trend	+4.11 cfs +12.2%	p=0.386	26	~1941

⚠️ 2 gages 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.

53 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. 49 gage(s) and 82 structure(s) report in 2026, but structure reporting only reached half its modern level around ~2017. 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)
1900s	1	0
1910s	2	0
1920s	6	0
1930s	6	0
1940s	10	10
1950s	5	12
1960s	5	11
1970s	6	18
1980s	6	8
1990s	12	12
2000s	16	10
2010s	24	44
2020s	48	79

Mass-balance (network closure) trend

Structure divrec-history backfill coverage as of the last check: 2% of 3852 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 (2123 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.

FORT BENT DITCH: reach shifted from -468 cfs to +43 cfs summer mean (more gaining, p=0.030, 19 yr) [sedimentary plains/foothills: moderate groundwater connectivity -- gain/loss shifts can be real aquifer response; corroborate with nearby well records] [16 alluvial wells within 2 mi of the gage; pooled water table -0.7 ft (1961–2023, no_trend)]
GRANADA IRRIGATION CANAL AUGMENTATION STATION EAST: reach shifted from -223 cfs to -187 cfs summer mean (more gaining, p=0.020, 11 yr) [sedimentary plains/foothills: moderate groundwater connectivity -- gain/loss shifts can be real aquifer response; corroborate with nearby well records] [measurement-evolution caution: this shift co-moves with the growth of the gage/metering network (rho=0.61) -- part of it may be unaccounted water becoming accounted, not hydrologic change] [31 alluvial wells within 2 mi of the gage; pooled water table +619.3 ft (1955–2023, decreasing)]
AMITY CANAL: reach shifted from -370 cfs to +243 cfs summer mean (more gaining, p=0.003, 39 yr) [sedimentary plains/foothills: moderate groundwater connectivity -- gain/loss shifts can be real aquifer response; corroborate with nearby well records] [measurement-evolution caution: this shift co-moves with the growth of the gage/metering network (rho=0.78) -- part of it may be unaccounted water becoming accounted, not hydrologic change] [28 alluvial wells within 2 mi of the gage; pooled water table +140256.0 ft (1955–2018, decreasing)]
WILD HORSE CREEK ABOVE HOLLY, CO: reach shifted from -400 cfs to -21 cfs summer mean (more gaining, p=0.000, 25 yr) [sedimentary plains/foothills: moderate groundwater connectivity -- gain/loss shifts can be real aquifer response; corroborate with nearby well records] [measurement-evolution caution: this shift co-moves with the growth of the gage/metering network (rho=0.61) -- part of it may be unaccounted water becoming accounted, not hydrologic change] [31 alluvial wells within 2 mi of the gage; pooled water table +0.9 ft (1955–2023, no_trend)]
KICKING BIRD CANAL: reach shifted from -9 cfs to -9 cfs summer mean (more gaining, p=0.012, 10 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=0.44) -- part of it may be unaccounted water becoming accounted, not hydrologic change]
HYDE DITCH: reach shifted from -180 cfs to -25 cfs summer mean (more gaining, p=0.000, 17 yr) [sedimentary plains/foothills: moderate groundwater connectivity -- gain/loss shifts can be real aquifer response; corroborate with nearby well records] [36 alluvial wells within 2 mi of the gage; pooled water table +47319.1 ft (1956–2018, decreasing)]

Groundwater now has its own tab: 2601 monitored well(s), water-table trends, stream corridors, and the advisory depletion screen.

Reservoirs now has its own tab: 22 reservoir(s), end-of-year storage back to 1949, click-to-chart histories.

Cross-gage pattern fingerprint

Over the 76-year window with full coverage (1951–2026), the dominant shared pattern across 3 gage(s) explains 83% 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 2026-09-27)

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.

NORTH GATEWAY PARK POND NO 2 (diversion): -23.8 cfs (50% of that reach's correction)
LAMAR FEEDER NO 2 (diversion): -23.8 cfs (50% of that reach's correction)
PERDUE PIPELINE (diversion): +2.5 cfs (5% of that reach's correction)
WAGNER & GILBERT P/L (diversion): +2.5 cfs (5% of that reach's correction)
NEENOSHE RESERVOIR (diversion): +2.5 cfs (5% of that reach's correction)
RAY GILBERT SEEP DITCH (diversion): +2.5 cfs (5% of that reach's correction)
HYDE DITCH (diversion): +2.5 cfs (5% of that reach's correction)
W N HUTCHISON DITCH (diversion): +2.5 cfs (5% of that reach's correction)
LAMAR CANAL (diversion): +2.5 cfs (5% of that reach's correction)
BUTTE RESERVOIR (diversion): +2.5 cfs (5% of that reach's correction)

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_20260928 (imported 2026-10-04) for history, plus the CDSS REST API for current conditions.

Check	State	What was measured
gage freshness	stale	newest gage reading is 14 day(s) old (target 7)
diversion record	expected-lag	newest diversion record is 346 day(s) old (DWR publishes ~1 year in arrears)
structure coverage	sparse	2% of schematic structures have data

Independent check: PASS — 100.0000% agreement across 22,510 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 — 99.85% day-level agreement with USGS's own published records for the same gages, across 19 co-listed station(s) and 272,353 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.

62 gage(s) / 467,070 daily values (1902-08-21–2026-09-27); 234 structure(s) with diversion records; 2116 with decreed rights. Methodology has not yet had independent expert review — treat every figure as an advisory screen, not an administrative or legal conclusion.

Groundwater

Source DWR administrative record · verify at DWR groundwater wells ↗ Source DWR administrative record · verify at DWR well permits ↗

25,500 water-level measurements across 2601 monitored well(s) — 1104 alluvial, 887 bedrock — plus 2 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 397 well(s) with enough record for a trend test: 134 declining, 42 rising.

Fastest-declining wells	Setting	ft / decade	Span	p
▸ SHP-45 TWN.OF SPRINGFIELD	bedrock	-41.99	61 yr	0.0005
▸ SC02304305CAC2	unknown	-36.26	15 yr	0.0
▸ SHP-11 AUSMUS,G,& S. 1	bedrock	-31.58	61 yr	0.0
▸ SHP-30 HUME, CHARLES	bedrock	-28.79	88 yr	0.0001
▸ SHP-09 COGBURN, B.	bedrock	-26.5	42 yr	0.0002
▸ SHP-18 COMMERCE RANCH 3	bedrock	-26.22	75 yr	0.0
▸ SC03004513CCC	bedrock	-25.82	20 yr	0.0
▸ SHP-06 MEYERS, S.	bedrock	-24.5	41 yr	0.0043

Stream corridors — the surface connection

Where a reach's gain or loss has shifted, the wells within two miles of its anchoring gage and what their water table did over the same era.

How the corridor is assembled

For each reach whose gain/loss has shifted (Trends tab): the wells within 2 miles of its anchoring gage, their pooled water-table history over the same era, and an advisory Glover screen of lagged stream depletion from nearby metered pumping. v1 proximity = distance to the reach's anchoring gage; segment-based reach join is a flagged upgrade.

FORT BENT DITCH: 16 alluvial well(s) nearby; pooled water table -0.7 ft (1961–2023, no_trend, p=0.3224)

GRANADA IRRIGATION CANAL AUGMENTATION STATION EAST: 31 alluvial well(s) nearby; pooled water table +619.3 ft (1955–2023, decreasing, p=0.0023)

AMITY CANAL: 28 alluvial well(s) nearby; pooled water table +140256.0 ft (1955–2018, decreasing, p=0.0)

WILD HORSE CREEK ABOVE HOLLY, CO: 31 alluvial well(s) nearby; pooled water table +0.9 ft (1955–2023, no_trend, p=0.9539)

KICKING BIRD CANAL: 0 alluvial well(s) nearby

HYDE DITCH: 36 alluvial well(s) nearby; pooled water table +47319.1 ft (1956–2018, decreasing, p=0.0002)

ARKANSAS RIVER AT LAMAR, CO.: 61 alluvial well(s) nearby; pooled water table +0.7 ft (1955–2018, no_trend, p=0.3129)

LAMAR CANAL: 65 alluvial well(s) nearby; pooled water table +0.7 ft (1955–2018, no_trend, p=0.8842)

FORT BENT DITCH AUG STATION: 25 alluvial well(s) nearby; pooled water table +95038.7 ft (1955–2018, no_trend, p=0.0506)

BIG SANDY CREEK NEAR LAMAR, CO.: 29 alluvial well(s) nearby; pooled water table +0.0 ft (1956–2023, no_trend, p=0.7591)

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.

14,611 well permits on file — not decreed rights

29% household or domestic use

82 ft median depth, 9,509 wells reporting

51% are constructed wells; 17% tie to a decreed structure. A permit is permission to drill, not a water right; most here are exempt household wells. More in three things called “well”, or turn on the Well permits chip on the map above to see where they sit.

Permits issued here, by year

8,256 located water-supply permits with an issue date, 1939 to 2026; half of them had been issued by 1993, and the busiest year was 1972 with 249. The district’s 1,607 monitoring holes are counted apart: they are drilled to look, not to pump. A permit is not a well, and the year is the date the paper was issued, not a drilling date. The 14,611 above counts every permit on file here; 4,748 of them have no usable location or no issue date and are not in this chart.

Show the monitoring holes too (1,607; the scale changes)

water-supply permits issued that year monitoring holes, when shown 1 issued before 1950 is in the table, not the bars

The counts by year, as a table

Located well permits with an issue date in this district, by issue year. Monitoring holes are the two DWR monitoring categories; water-supply is everything else.
Year	Issued	Monitoring holes	Water-supply	Issued through that year
1939	1	0	1	1
1953	24	0	24	25
1954	41	0	41	66
1955	77	0	77	143
1956	52	0	52	195
1957	69	0	69	264
1958	33	0	33	297
1959	33	0	33	330
1960	175	0	175	505
1961	61	0	61	566
1962	54	0	54	620
1963	120	0	120	740
1964	131	0	131	871
1965	142	0	142	1,013
1966	102	0	102	1,115
1967	108	0	108	1,223
1968	85	0	85	1,308
1969	87	0	87	1,395
1970	122	0	122	1,517
1971	80	0	80	1,597
1972	249	0	249	1,846
1973	167	0	167	2,013
1974	159	0	159	2,172
1975	132	0	132	2,304
1976	90	0	90	2,394
1977	125	0	125	2,519
1978	103	0	103	2,622
1979	154	0	154	2,776
1980	91	0	91	2,867
1981	108	2	106	2,975
1982	75	2	73	3,050
1983	81	1	80	3,131
1984	53	0	53	3,184
1985	98	0	98	3,282
1986	105	0	105	3,387
1987	124	4	120	3,511
1988	125	6	119	3,636
1989	121	8	113	3,757
1990	144	21	123	3,901
1991	186	46	140	4,087
1992	175	49	126	4,262
1993	166	64	102	4,428
1994	189	36	153	4,617
1995	146	32	114	4,763
1996	220	47	173	4,983
1997	184	64	120	5,167
1998	236	92	144	5,403
1999	202	74	128	5,605
2000	254	83	171	5,859
2001	202	34	168	6,061
2002	285	107	178	6,346
2003	258	101	157	6,604
2004	254	130	124	6,858
2005	270	101	169	7,128
2006	142	29	113	7,270
2007	128	20	108	7,398
2008	160	37	123	7,558
2009	117	26	91	7,675
2010	135	22	113	7,810
2011	164	7	157	7,974
2012	155	3	152	8,129
2013	143	18	125	8,272
2014	106	19	87	8,378
2015	131	13	118	8,509
2016	148	38	110	8,657
2017	125	23	102	8,782
2018	203	69	134	8,985
2019	127	44	83	9,112
2020	134	39	95	9,246
2021	132	23	109	9,378
2022	127	30	97	9,505
2023	117	18	99	9,622
2024	71	5	66	9,693
2025	70	2	68	9,763
2026	100	18	82	9,863

Every district in the file on one scale · the whole file, one year at a time · Plate 4 of the Driller’s Atlas.

What drillers reached, township by township

219 PLSS townships here where at least 5 water-supply permits naming the same aquifer filed a depth (8,220 permits in all; the 24 most-drilled are drawn, every one is in the table). Each column is one township, six miles square, on one scale to 1,300 ft below ground: a faint lane spans the 10th to 90th percentile of where the permits naming that aquifer stopped, the solid band their screens, the tick the median. This is the permit file’s view of the ground — the aquifer is the name the driller wrote, the band is where those holes ended — not a geologic map, and a township is as fine as it gets. Monitoring holes are left out. 39 of these townships straddle a district line and are filed here because most of their permits are.

T11S R62W
243 · 90% here

T9S R56W
212

T22S R47W
200

T22S R46W
197

T11S R60W
180

T23S R42W
175

T11S R61W
171

T23S R46W
168

T10S R60W
162 · 89% here

T10S R59W
141

T30S R46W
129 · 92% here

T29S R44W
124

T22S R45W
122

T22S R51W
122 · 92% here

T30S R43W
101 · 78% here

T30S R44W
95

T28S R44W
94

T30S R45W
93

T22S R42W
92

T12S R59W
88 · 86% here

T31S R45W
86 · 68% here

T23S R51W
82 · 92% here

T9S R57W
80

T23S R44W
78

unnamed alluvium Denver Arapahoe Laramie-Fox Hills Ogallala / High Plains more than one named other named faint = where the permits naming it stopped (10th–90th pct) · solid = their screens · tick = median · ft below ground as filed

Every township here, as a table

Water-supply permits by PLSS township and the aquifer named on them, where at least 5 filed a depth: percentiles of the depth drilled to and of the screen top and bottom (where at least 5 filed a screen), feet below ground as filed. The permit file’s view, not a geologic map.
Township	Share of its permits in this district	Aquifer named	Permits with a depth	Drilled depth p10 / p50 / p90, ft	Screen top p10 / p50 / p90, ft	Screen bottom p10 / p50 / p90, ft
T11S R62W 6th PM	90%	alluvium	25	42 / 62 / 94	14 / 21 / 49	41 / 66 / 84
T11S R62W 6th PM	90%	unnamed	111	50 / 100 / 316	12 / 50 / 198	53 / 120 / 389
T11S R62W 6th PM	90%	Denver	86	165 / 341 / 520	40 / 115 / 239	175 / 322 / 499
T11S R62W 6th PM	90%	Arapahoe	19	528 / 895 / 1,134	456 / 669 / 756	527 / 875 / 1,143
T9S R56W 6th PM	100%	alluvium	43	22 / 35 / 70	10 / 17 / 40	30 / 37 / 66
T9S R56W 6th PM	100%	unnamed	169	21 / 36 / 65	5 / 18 / 47	20 / 35 / 69
T22S R47W 6th PM	100%	unnamed	177	28 / 40 / 277	15 / 22 / 192	32 / 43 / 277
T22S R47W 6th PM	100%	other named	20	350 / 550 / 696	220 / 425 / 527	350 / 545 / 692
T22S R46W 6th PM	100%	unnamed	183	25 / 48 / 282	10 / 26 / 72	27 / 50 / 139
T22S R46W 6th PM	100%	other named	12	262 / 421 / 825	200 / 302 / 515	260 / 402 / 667
T11S R60W 6th PM	98%	alluvium	6	24 / 54 / 98	—	—
T11S R60W 6th PM	98%	unnamed	81	75 / 216 / 443	60 / 177 / 337	120 / 305 / 500
T11S R60W 6th PM	98%	Arapahoe	76	262 / 340 / 508	106 / 180 / 301	257 / 350 / 520
T11S R60W 6th PM	98%	Laramie-Fox Hills	10	657 / 699 / 1,202	499 / 594 / 972	653 / 699 / 1,202
T23S R42W 6th PM	100%	unnamed	167	45 / 108 / 332	20 / 68 / 133	53 / 113 / 187
T23S R42W 6th PM	100%	other named	5	359 / 386 / 497	—	—
T11S R61W 6th PM	98%	alluvium	20	39 / 52 / 66	16 / 20 / 40	46 / 52 / 60
T11S R61W 6th PM	98%	unnamed	76	45 / 138 / 531	20 / 81 / 501	44 / 202 / 685
T11S R61W 6th PM	98%	Denver	17	112 / 295 / 430	22 / 70 / 285	107 / 282 / 406
T11S R61W 6th PM	98%	Arapahoe	57	296 / 400 / 606	131 / 280 / 470	295 / 400 / 595
T23S R46W 6th PM	100%	alluvium	5	22 / 25 / 31	—	—
T23S R46W 6th PM	100%	unnamed	146	26 / 62 / 320	8 / 65 / 316	31 / 105 / 577
T23S R46W 6th PM	100%	other named	17	228 / 370 / 534	112 / 288 / 406	226 / 360 / 480
T10S R60W 6th PM	89%	alluvium	31	49 / 60 / 70	20 / 25 / 42	50 / 60 / 68
T10S R60W 6th PM	89%	unnamed	70	49 / 145 / 502	20 / 126 / 473	68 / 218 / 562
T10S R60W 6th PM	89%	Arapahoe	32	142 / 295 / 398	52 / 113 / 300	140 / 296 / 406
T10S R60W 6th PM	89%	Laramie-Fox Hills	25	458 / 555 / 748	377 / 471 / 611	458 / 555 / 748
T10S R59W 6th PM	99%	alluvium	23	30 / 54 / 139	16 / 19 / 60	46 / 56 / 113
T10S R59W 6th PM	99%	more than one named	6	54 / 80 / 120	—	—
T10S R59W 6th PM	99%	unnamed	72	34 / 150 / 300	16 / 135 / 270	59 / 205 / 315
T10S R59W 6th PM	99%	Laramie-Fox Hills	36	192 / 238 / 440	105 / 165 / 361	180 / 240 / 441
T30S R46W 6th PM	92%	other named	47	120 / 203 / 374	95 / 180 / 238	140 / 260 / 298
T30S R46W 6th PM	92%	unnamed	82	119 / 252 / 339	63 / 130 / 262	118 / 270 / 344
T29S R44W 6th PM	95%	unnamed	27	196 / 274 / 440	45 / 212 / 360	165 / 278 / 420
T29S R44W 6th PM	95%	other named	94	240 / 352 / 500	120 / 225 / 300	230 / 411 / 605
T22S R45W 6th PM	99%	unnamed	113	31 / 65 / 158	10 / 38 / 123	39 / 58 / 169
T22S R45W 6th PM	99%	other named	9	316 / 450 / 602	290 / 490 / 555	360 / 586 / 620
T22S R51W 6th PM	92%	unnamed	107	33 / 80 / 282	12 / 55 / 240	34 / 75 / 298
T22S R51W 6th PM	92%	other named	13	170 / 285 / 434	139 / 213 / 356	164 / 292 / 380
T30S R43W 6th PM	78%	unnamed	29	204 / 260 / 571	58 / 125 / 237	173 / 260 / 335
T30S R43W 6th PM	78%	more than one named	21	85 / 300 / 570	—	—
T30S R43W 6th PM	78%	other named	43	238 / 415 / 660	139 / 185 / 273	188 / 300 / 545
T30S R43W 6th PM	78%	Ogallala / High Plains	8	142 / 425 / 618	—	—
T30S R44W 6th PM	98%	unnamed	51	172 / 280 / 400	—	—
T30S R44W 6th PM	98%	other named	39	236 / 295 / 429	24 / 80 / 189	92 / 155 / 567
T28S R44W 6th PM	99%	unnamed	18	246 / 310 / 416	—	—
T28S R44W 6th PM	99%	other named	76	287 / 476 / 549	180 / 273 / 388	268 / 394 / 552
T30S R45W 6th PM	99%	unnamed	37	216 / 290 / 330	—	—
T30S R45W 6th PM	99%	other named	46	240 / 300 / 402	180 / 197 / 280	232 / 340 / 402
T30S R45W 6th PM	99%	more than one named	6	287 / 306 / 330	—	—
T22S R42W 6th PM	100%	unnamed	86	58 / 131 / 368	56 / 98 / 152	81 / 139 / 195
T12S R59W 6th PM	86%	unnamed	62	80 / 148 / 360	40 / 95 / 313	80 / 178 / 372
T12S R59W 6th PM	86%	Arapahoe	6	192 / 220 / 308	—	—
T12S R59W 6th PM	86%	Laramie-Fox Hills	20	282 / 420 / 586	120 / 305 / 520	273 / 420 / 602
T31S R45W 6th PM	68%	unnamed	30	150 / 290 / 373	—	—
T31S R45W 6th PM	68%	other named	37	252 / 340 / 558	153 / 250 / 325	250 / 370 / 639
T31S R45W 6th PM	68%	more than one named	15	301 / 345 / 365	—	—
T23S R51W 6th PM	92%	unnamed	63	24 / 46 / 300	16 / 22 / 260	34 / 41 / 309
T23S R51W 6th PM	92%	other named	15	125 / 168 / 318	86 / 118 / 254	136 / 169 / 314
T9S R57W 6th PM	99%	unnamed	55	33 / 50 / 75	12 / 25 / 43	37 / 53 / 66
T9S R57W 6th PM	99%	alluvium	24	41 / 58 / 91	20 / 34 / 38	42 / 56 / 75
T23S R44W 6th PM	100%	unnamed	69	32 / 56 / 686	11 / 25 / 39	31 / 45 / 83
T23S R44W 6th PM	100%	other named	9	428 / 668 / 726	—	—
T9S R58W 6th PM	100%	alluvium	26	30 / 62 / 94	20 / 40 / 57	48 / 70 / 87
T9S R58W 6th PM	100%	unnamed	39	45 / 65 / 186	20 / 40 / 144	47 / 80 / 175
T10S R57W 6th PM	100%	unnamed	60	45 / 70 / 120	20 / 40 / 69	46 / 60 / 114
T10S R57W 6th PM	100%	alluvium	9	65 / 77 / 124	22 / 37 / 82	51 / 75 / 127
T11S R59W 6th PM	100%	unnamed	42	80 / 230 / 523	58 / 179 / 482	110 / 244 / 562
T11S R59W 6th PM	100%	Arapahoe	13	200 / 295 / 396	65 / 160 / 261	175 / 295 / 405
T11S R59W 6th PM	100%	Laramie-Fox Hills	13	244 / 380 / 537	150 / 310 / 457	230 / 425 / 537
T11S R54W 6th PM	99%	unnamed	64	25 / 42 / 73	10 / 20 / 57	28 / 42 / 77
T22S R44W 6th PM	100%	unnamed	62	38 / 60 / 283	18 / 33 / 70	42 / 72 / 102
T23S R43W 6th PM	100%	unnamed	61	47 / 70 / 485	19 / 35 / 80	46 / 72 / 120
T10S R58W 6th PM	100%	alluvium	14	44 / 60 / 78	—	—
T10S R58W 6th PM	100%	unnamed	29	66 / 105 / 218	41 / 80 / 152	77 / 120 / 218
T10S R58W 6th PM	100%	Laramie-Fox Hills	17	158 / 270 / 326	100 / 135 / 181	183 / 260 / 303
T21S R46W 6th PM	100%	unnamed	54	34 / 84 / 737	30 / 40 / 517	57 / 125 / 597
T21S R46W 6th PM	100%	other named	6	670 / 848 / 912	318 / 715 / 755	665 / 815 / 855
T11S R55W 6th PM	100%	unnamed	58	33 / 50 / 63	19 / 35 / 44	44 / 60 / 62
T12S R58W 6th PM	94%	unnamed	54	45 / 78 / 120	19 / 35 / 60	44 / 78 / 116
T21S R48W 6th PM	100%	unnamed	53	40 / 50 / 60	24 / 30 / 40	44 / 54 / 60
T17S R47W 6th PM	100%	unnamed	48	43 / 56 / 70	30 / 36 / 50	48 / 56 / 70
T23S R47W 6th PM	100%	unnamed	44	31 / 160 / 438	13 / 115 / 268	30 / 155 / 323
T23S R47W 6th PM	100%	other named	11	180 / 290 / 410	154 / 270 / 342	222 / 345 / 419
T11S R57W 6th PM	100%	unnamed	54	46 / 80 / 130	30 / 60 / 96	53 / 80 / 124
T13S R57W 6th PM	97%	unnamed	51	30 / 45 / 60	15 / 20 / 28	28 / 44 / 62
T15S R48W 6th PM	100%	unnamed	52	30 / 46 / 62	25 / 34 / 47	39 / 47 / 56
T22S R48W 6th PM	99%	unnamed	38	21 / 39 / 466	16 / 19 / 38	30 / 39 / 58
T22S R48W 6th PM	99%	other named	12	304 / 555 / 699	240 / 355 / 570	480 / 555 / 700
T25S R42W 6th PM	100%	unnamed	18	107 / 362 / 546	189 / 320 / 418	217 / 380 / 545
T25S R42W 6th PM	100%	other named	34	380 / 542 / 780	155 / 380 / 434	201 / 480 / 544
T28S R43W 6th PM	99%	unnamed	10	145 / 212 / 465	—	—
T28S R43W 6th PM	99%	other named	37	258 / 515 / 641	60 / 192 / 351	263 / 348 / 614
T29S R43W 6th PM	96%	unnamed	17	130 / 380 / 474	—	—
T29S R43W 6th PM	96%	other named	32	322 / 422 / 594	—	—
T10S R55W 6th PM	100%	unnamed	47	26 / 42 / 60	7 / 20 / 39	22 / 46 / 60
T22S R49W 6th PM	99%	unnamed	43	26 / 37 / 386	20 / 40 / 335	36 / 59 / 395
T28S R46W 6th PM	100%	unnamed	22	90 / 168 / 276	30 / 110 / 222	50 / 170 / 280
T28S R46W 6th PM	100%	other named	25	160 / 210 / 342	84 / 238 / 322	156 / 258 / 382
T28S R45W 6th PM	94%	unnamed	9	201 / 290 / 410	—	—
T28S R45W 6th PM	94%	other named	37	251 / 415 / 457	—	—
T11S R56W 6th PM	100%	unnamed	45	14 / 42 / 77	12 / 24 / 52	30 / 46 / 81
T12S R57W 6th PM	100%	unnamed	44	32 / 55 / 75	21 / 36 / 44	42 / 56 / 64
T24S R42W 6th PM	100%	unnamed	21	88 / 160 / 409	93 / 127 / 345	114 / 147 / 392
T24S R42W 6th PM	100%	other named	23	350 / 536 / 580	293 / 310 / 367	350 / 410 / 526
T30S R47W 6th PM	97%	more than one named	5	68 / 106 / 234	—	—
T30S R47W 6th PM	97%	unnamed	15	76 / 180 / 299	40 / 135 / 212	65 / 168 / 280
T30S R47W 6th PM	97%	other named	23	120 / 205 / 535	21 / 145 / 205	90 / 205 / 317
T21S R47W 6th PM	100%	unnamed	43	34 / 60 / 140	19 / 36 / 72	37 / 78 / 92
T21S R42W 6th PM	100%	unnamed	25	58 / 148 / 201	—	—
T21S R42W 6th PM	100%	Ogallala / High Plains	18	134 / 188 / 251	92 / 147 / 160	143 / 184 / 220
T9S R55W 6th PM	76%	unnamed	40	24 / 40 / 246	10 / 38 / 161	30 / 56 / 310
T11S R58W 6th PM	100%	unnamed	37	70 / 117 / 194	50 / 86 / 127	68 / 146 / 181
T18S R48W 6th PM	100%	unnamed	42	49 / 77 / 120	40 / 62 / 79	63 / 80 / 104
T23S R41W 6th PM	100%	unnamed	41	45 / 75 / 285	25 / 40 / 227	50 / 71 / 353
T29S R46W 6th PM	100%	unnamed	25	38 / 100 / 255	31 / 65 / 93	39 / 100 / 174
T29S R46W 6th PM	100%	other named	14	58 / 215 / 378	82 / 162 / 202	212 / 312 / 336
T13S R52W 6th PM	100%	unnamed	41	28 / 40 / 45	14 / 20 / 30	29 / 37 / 45
T18S R46W 6th PM	100%	unnamed	40	40 / 50 / 62	20 / 34 / 44	40 / 52 / 63
T14S R56W 6th PM	69%	unnamed	38	40 / 45 / 61	20 / 25 / 43	40 / 45 / 87
T23S R48W 6th PM	100%	unnamed	31	25 / 63 / 145	20 / 44 / 259	40 / 76 / 323
T23S R48W 6th PM	100%	other named	7	29 / 205 / 488	20 / 150 / 306	29 / 205 / 488
T23S R49W 6th PM	100%	unnamed	32	27 / 142 / 419	22 / 94 / 262	38 / 142 / 435
T23S R49W 6th PM	100%	other named	7	209 / 440 / 589	205 / 340 / 520	276 / 440 / 618
T17S R46W 6th PM	100%	unnamed	38	34 / 51 / 64	16 / 30 / 42	33 / 48 / 62
T26S R41W 6th PM	100%	unnamed	8	251 / 324 / 502	—	—
T26S R41W 6th PM	100%	other named	27	400 / 460 / 793	200 / 210 / 428	384 / 405 / 673
T11S R53W 6th PM	100%	unnamed	35	26 / 35 / 58	15 / 20 / 38	31 / 40 / 58
T14S R51W 6th PM	100%	unnamed	36	20 / 25 / 36	10 / 19 / 28	22 / 26 / 45
T12S R53W 6th PM	100%	unnamed	31	24 / 41 / 80	14 / 30 / 44	29 / 65 / 82
T16S R48W 6th PM	100%	unnamed	35	31 / 45 / 65	20 / 27 / 54	30 / 48 / 75
T18S R45W 6th PM	100%	unnamed	35	37 / 44 / 57	20 / 34 / 40	32 / 46 / 60
T18S R47W 6th PM	100%	unnamed	33	56 / 80 / 100	35 / 53 / 79	55 / 80 / 99
T27S R43W 6th PM	100%	unnamed	15	102 / 290 / 532	—	—
T27S R43W 6th PM	100%	other named	19	197 / 560 / 806	138 / 140 / 241	178 / 185 / 281
T13S R48W 6th PM	100%	unnamed	34	19 / 26 / 35	14 / 22 / 26	22 / 30 / 35
T19S R46W 6th PM	100%	unnamed	34	31 / 42 / 76	21 / 40 / 62	30 / 52 / 84
T20S R43W 6th PM	100%	unnamed	11	140 / 216 / 275	51 / 128 / 212	142 / 180 / 279
T20S R43W 6th PM	100%	Ogallala / High Plains	23	161 / 245 / 320	152 / 180 / 240	216 / 296 / 319
T14S R47W 6th PM	100%	unnamed	33	23 / 38 / 62	26 / 32 / 48	46 / 52 / 65
T17S R48W 6th PM	96%	unnamed	31	28 / 80 / 115	20 / 58 / 79	36 / 80 / 110
T10S R56W 6th PM	100%	unnamed	30	40 / 52 / 66	18 / 32 / 49	41 / 58 / 64
T23S R45W 6th PM	100%	unnamed	28	50 / 163 / 292	40 / 150 / 243	89 / 218 / 2,617
T27S R44W 6th PM	100%	unnamed	20	69 / 245 / 440	—	—
T27S R44W 6th PM	100%	other named	10	352 / 418 / 601	—	—
T20S R42W 6th PM	100%	unnamed	22	85 / 154 / 221	79 / 155 / 181	112 / 189 / 223
T20S R42W 6th PM	100%	Ogallala / High Plains	9	102 / 210 / 243	62 / 130 / 198	82 / 200 / 234
T22S R50W 6th PM	100%	unnamed	23	65 / 220 / 480	160 / 212 / 360	212 / 270 / 433
T22S R50W 6th PM	100%	other named	8	246 / 360 / 514	148 / 218 / 391	240 / 298 / 471
T12S R49W 6th PM	98%	unnamed	28	17 / 35 / 125	12 / 42 / 70	29 / 62 / 82
T12S R54W 6th PM	100%	unnamed	30	30 / 55 / 72	20 / 37 / 51	40 / 58 / 69
T13S R49W 6th PM	100%	unnamed	30	25 / 34 / 59	15 / 20 / 75	33 / 35 / 89
T15S R47W 6th PM	100%	unnamed	28	30 / 40 / 60	18 / 25 / 40	31 / 40 / 60
T18S R42W 6th PM	98%	unnamed	18	68 / 80 / 90	46 / 60 / 65	63 / 83 / 95
T18S R42W 6th PM	98%	Ogallala / High Plains	11	75 / 83 / 87	50 / 60 / 64	70 / 82 / 86
T15S R53W 6th PM	97%	unnamed	28	35 / 45 / 76	12 / 27 / 65	43 / 50 / 82
T12S R55W 6th PM	94%	unnamed	26	30 / 47 / 67	15 / 24 / 42	32 / 47 / 61
T13S R58W 6th PM	68%	unnamed	26	39 / 60 / 70	20 / 42 / 48	40 / 60 / 68
T15S R54W 6th PM	72%	unnamed	27	28 / 60 / 75	22 / 45 / 59	34 / 65 / 79
T16S R47W 6th PM	100%	unnamed	25	29 / 48 / 73	15 / 30 / 44	32 / 48 / 69
T21S R45W 6th PM	100%	unnamed	26	48 / 84 / 160	20 / 29 / 79	29 / 72 / 144
T13S R54W 6th PM	97%	unnamed	26	34 / 46 / 60	16 / 24 / 44	34 / 44 / 60
T15S R49W 6th PM	100%	unnamed	24	31 / 46 / 66	20 / 23 / 33	28 / 46 / 68
T27S R46W 6th PM	97%	unnamed	19	125 / 240 / 365	155 / 210 / 325	262 / 277 / 465
T27S R46W 6th PM	97%	other named	5	128 / 245 / 369	—	—
T29S R45W 6th PM	98%	unnamed	9	220 / 258 / 383	—	—
T29S R45W 6th PM	98%	other named	17	197 / 300 / 504	—	—
T8S R56W 6th PM	57%	alluvium	7	27 / 30 / 44	8 / 13 / 16	26 / 30 / 35
T8S R56W 6th PM	57%	unnamed	15	20 / 32 / 41	10 / 19 / 27	30 / 32 / 41
T13S R50W 6th PM	100%	unnamed	25	22 / 30 / 63	14 / 22 / 34	27 / 38 / 54
T14S R53W 6th PM	100%	unnamed	25	34 / 40 / 49	17 / 20 / 26	34 / 36 / 41
T14S R54W 6th PM	100%	unnamed	24	30 / 35 / 60	11 / 20 / 25	30 / 33 / 53
T27S R42W 6th PM	100%	unnamed	10	131 / 285 / 482	—	—
T27S R42W 6th PM	100%	other named	14	190 / 290 / 650	—	—
T19S R47W 6th PM	100%	unnamed	24	40 / 88 / 160	34 / 62 / 84	49 / 95 / 112
T22S R43W 6th PM	100%	unnamed	23	39 / 90 / 500	4 / 44 / 422	43 / 100 / 450
T25S R51W 6th PM	100%	unnamed	20	40 / 106 / 415	21 / 61 / 287	40 / 136 / 544
T26S R46W 6th PM	100%	other named	8	130 / 206 / 314	40 / 180 / 232	110 / 235 / 336
T26S R46W 6th PM	100%	unnamed	16	78 / 220 / 410	68 / 248 / 300	108 / 325 / 438
T31S R51W 6th PM	73%	unnamed	21	200 / 250 / 329	—	—
T26S R42W 6th PM	100%	unnamed	14	202 / 340 / 507	—	—
T26S R42W 6th PM	100%	other named	8	415 / 546 / 788	—	—
T26S R43W 6th PM	100%	unnamed	22	60 / 504 / 718	133 / 245 / 366	298 / 420 / 764
T27S R48W 6th PM	100%	unnamed	21	54 / 213 / 470	—	—
T29S R42W 6th PM	95%	unnamed	10	95 / 319 / 424	—	—
T29S R42W 6th PM	95%	other named	13	242 / 404 / 610	—	—
T8S R57W 6th PM	64%	unnamed	19	29 / 45 / 123	—	—
T12S R51W 6th PM	100%	unnamed	20	24 / 29 / 73	12 / 15 / 46	24 / 29 / 66
T13S R53W 6th PM	100%	unnamed	21	29 / 41 / 58	11 / 23 / 39	29 / 38 / 59
T27S R45W 6th PM	100%	unnamed	16	181 / 275 / 430	128 / 250 / 268	165 / 265 / 332
T27S R45W 6th PM	100%	other named	5	316 / 400 / 422	—	—
T30S R48W 6th PM	100%	unnamed	10	89 / 240 / 301	—	—
T30S R48W 6th PM	100%	other named	8	206 / 285 / 312	—	—
T30S R51W 6th PM	100%	unnamed	21	31 / 105 / 295	21 / 65 / 262	36 / 95 / 300
T12S R48W 6th PM	67%	unnamed	16	32 / 70 / 374	—	—
T12S R48W 6th PM	67%	Ogallala / High Plains	5	127 / 195 / 232	—	—
T13S R51W 6th PM	100%	unnamed	21	20 / 28 / 35	—	—
T13S R56W 6th PM	100%	unnamed	21	30 / 40 / 55	—	—
T19S R48W 6th PM	100%	unnamed	21	50 / 65 / 147	26 / 45 / 76	46 / 65 / 112
T24S R46W 6th PM	100%	unnamed	20	73 / 293 / 483	—	—
T25S R43W 6th PM	100%	unnamed	19	31 / 70 / 438	10 / 30 / 292	27 / 53 / 318
T13S R55W 6th PM	96%	unnamed	19	29 / 35 / 62	10 / 18 / 30	30 / 40 / 60
T14S R48W 6th PM	96%	unnamed	19	24 / 36 / 53	19 / 30 / 39	32 / 47 / 53
T14S R50W 6th PM	100%	unnamed	20	24 / 33 / 53	15 / 20 / 28	27 / 38 / 47
T21S R43W 6th PM	100%	unnamed	15	133 / 150 / 197	—	—
T21S R43W 6th PM	100%	Ogallala / High Plains	5	140 / 179 / 204	—	—
T27S R47W 6th PM	100%	unnamed	14	40 / 230 / 349	—	—
T27S R47W 6th PM	100%	other named	6	325 / 368 / 403	—	—
T29S R47W 6th PM	96%	unnamed	17	100 / 180 / 256	75 / 135 / 149	100 / 155 / 178
T30S R52W 6th PM	96%	unnamed	20	39 / 112 / 263	—	—
T10S R54W 6th PM	100%	unnamed	19	24 / 30 / 58	14 / 15 / 20	24 / 30 / 33
T18S R51W 6th PM	67%	unnamed	18	63 / 76 / 86	24 / 55 / 64	44 / 75 / 84
T24S R50W 6th PM	100%	unnamed	16	30 / 80 / 358	15 / 24 / 108	30 / 45 / 188
T26S R47W 6th PM	100%	unnamed	15	47 / 160 / 256	—	—
T24S R41W 6th PM	100%	unnamed	8	86 / 160 / 357	—	—
T24S R41W 6th PM	100%	other named	7	350 / 390 / 474	—	—
T25S R46W 6th PM	100%	unnamed	14	50 / 199 / 344	—	—
T25S R52W 6th PM	65%	unnamed	13	210 / 300 / 367	—	—
T25S R52W 6th PM	65%	other named	5	259 / 320 / 388	149 / 260 / 336	259 / 320 / 388
T26S R45W 6th PM	100%	unnamed	16	114 / 232 / 430	130 / 192 / 392	190 / 232 / 422
T15S R50W 6th PM	100%	unnamed	17	31 / 36 / 54	15 / 15 / 22	31 / 34 / 42
T16S R50W 6th PM	100%	unnamed	17	37 / 48 / 80	17 / 30 / 57	40 / 50 / 76
T17S R49W 6th PM	100%	unnamed	17	45 / 60 / 80	25 / 36 / 66	46 / 56 / 86
T20S R49W 6th PM	100%	unnamed	17	38 / 58 / 107	26 / 28 / 66	38 / 44 / 82
T23S R50W 6th PM	100%	unnamed	15	125 / 205 / 400	115 / 240 / 435	180 / 380 / 520
T30S R50W 6th PM	100%	unnamed	15	68 / 235 / 300	76 / 213 / 264	178 / 243 / 300
T12S R50W 6th PM	94%	unnamed	16	21 / 28 / 148	12 / 16 / 92	26 / 45 / 164
T14S R49W 6th PM	100%	unnamed	16	28 / 34 / 48	15 / 20 / 29	29 / 34 / 49
T14S R52W 6th PM	100%	unnamed	16	31 / 42 / 88	20 / 24 / 57	38 / 54 / 90
T17S R45W 6th PM	100%	unnamed	15	26 / 42 / 56	10 / 22 / 30	29 / 41 / 50
T19S R49W 6th PM	100%	unnamed	16	55 / 71 / 82	34 / 48 / 64	60 / 64 / 84
T20S R48W 6th PM	100%	unnamed	15	42 / 58 / 84	—	—
T24S R45W 6th PM	100%	unnamed	13	68 / 245 / 457	—	—
T24S R47W 6th PM	100%	unnamed	8	154 / 296 / 426	—	—
T24S R47W 6th PM	100%	other named	8	206 / 302 / 413	138 / 265 / 345	262 / 356 / 415
T26S R51W 6th PM	100%	unnamed	13	36 / 140 / 348	—	—
T28S R42W 6th PM	100%	other named	10	182 / 417 / 617	—	—
T28S R42W 6th PM	100%	unnamed	6	272 / 440 / 528	—	—
T28S R50W 6th PM	100%	unnamed	10	146 / 195 / 300	—	—
T28S R50W 6th PM	100%	other named	6	132 / 200 / 285	—	—
T31S R52W 6th PM	100%	unnamed	15	85 / 180 / 400	41 / 110 / 160	66 / 175 / 188
T19S R42W 6th PM	100%	unnamed	10	57 / 73 / 110	—	—
T19S R42W 6th PM	100%	Ogallala / High Plains	5	64 / 85 / 128	—	—
T20S R44W 6th PM	100%	unnamed	11	55 / 132 / 205	22 / 92 / 167	52 / 132 / 202
T24S R51W 6th PM	88%	unnamed	6	128 / 182 / 312	—	—
T24S R51W 6th PM	88%	other named	9	104 / 340 / 470	72 / 150 / 350	102 / 190 / 425
T28S R49W 6th PM	100%	unnamed	9	184 / 270 / 412	—	—
T28S R49W 6th PM	100%	other named	6	280 / 349 / 360	228 / 308 / 320	268 / 340 / 345
T29S R50W 6th PM	100%	unnamed	14	81 / 222 / 477	44 / 203 / 306	80 / 303 / 466
T29S R52W 6th PM	96%	unnamed	13	63 / 105 / 243	22 / 41 / 120	60 / 110 / 296
T31S R53W 6th PM	70%	unnamed	15	32 / 160 / 226	33 / 65 / 106	51 / 85 / 160
T12S R56W 6th PM	100%	unnamed	14	10 / 50 / 72	20 / 25 / 49	40 / 45 / 69
T16S R52W 6th PM	100%	unnamed	13	19 / 94 / 104	48 / 76 / 119	89 / 98 / 153
T21S R51W 6th PM	100%	unnamed	13	70 / 100 / 500	—	—
T24S R48W 6th PM	100%	unnamed	13	35 / 130 / 220	—	—
T27S R53W 6th PM	77%	unnamed	12	26 / 50 / 119	—	—
T28S R53W 6th PM	90%	unnamed	14	46 / 152 / 370	35 / 40 / 92	50 / 60 / 218
T29S R48W 6th PM	100%	unnamed	7	112 / 250 / 352	—	—
T29S R48W 6th PM	100%	other named	7	272 / 310 / 360	222 / 300 / 306	280 / 350 / 360
T30S R49W 6th PM	94%	unnamed	7	233 / 275 / 370	—	—
T30S R49W 6th PM	94%	other named	5	190 / 323 / 372	—	—
T12S R52W 6th PM	100%	unnamed	13	27 / 35 / 46	14 / 20 / 28	28 / 35 / 49
T14S R46W 6th PM	68%	unnamed	12	72 / 110 / 170	—	—
T16S R49W 6th PM	96%	unnamed	13	22 / 39 / 125	12 / 19 / 30	23 / 30 / 45
T16S R51W 6th PM	100%	unnamed	13	30 / 47 / 109	10 / 24 / 90	30 / 52 / 110
T18S R49W 6th PM	100%	unnamed	11	50 / 70 / 85	23 / 40 / 40	39 / 60 / 70
T25S R45W 6th PM	100%	other named	6	80 / 150 / 208	48 / 60 / 186	80 / 100 / 209
T25S R45W 6th PM	100%	unnamed	7	70 / 278 / 434	—	—
T27S R49W 6th PM	100%	unnamed	13	105 / 230 / 553	—	—
T28S R47W 6th PM	100%	unnamed	9	158 / 200 / 328	—	—
T10S R53W 6th PM	50%	unnamed	10	25 / 32 / 40	—	—
T11S R52W 6th PM	68%	unnamed	12	43 / 90 / 149	38 / 70 / 100	56 / 90 / 120
T13S R47W 6th PM	89%	unnamed	12	13 / 24 / 39	—	—
T25S R48W 6th PM	100%	unnamed	7	152 / 200 / 408	—	—
T25S R48W 6th PM	100%	other named	5	240 / 480 / 480	196 / 400 / 440	240 / 480 / 480
T26S R52W 6th PM	94%	unnamed	12	40 / 65 / 249	—	—
T27S R52W 6th PM	91%	unnamed	11	65 / 138 / 300	—	—
T29S R49W 6th PM	95%	unnamed	6	230 / 252 / 341	—	—
T29S R49W 6th PM	95%	other named	6	134 / 265 / 328	100 / 198 / 255	134 / 265 / 328
T17S R50W 6th PM	100%	unnamed	11	50 / 60 / 80	—	—
T20S R50W 6th PM	100%	unnamed	10	86 / 100 / 115	—	—
T25S R47W 6th PM	100%	unnamed	9	208 / 296 / 375	—	—
T25S R50W 6th PM	100%	unnamed	11	50 / 111 / 325	—	—
T26S R48W 6th PM	100%	unnamed	7	136 / 390 / 500	—	—
T27S R51W 6th PM	100%	unnamed	9	36 / 120 / 267	—	—
T28S R48W 6th PM	100%	unnamed	9	92 / 200 / 344	—	—
T28S R52W 6th PM	100%	unnamed	11	70 / 100 / 274	—	—
T29S R51W 6th PM	100%	unnamed	11	62 / 90 / 220	—	—
T14S R55W 6th PM	94%	unnamed	9	36 / 47 / 55	—	—
T15S R51W 6th PM	100%	unnamed	10	30 / 32 / 40	—	—
T16S R53W 6th PM	57%	unnamed	10	45 / 79 / 90	40 / 70 / 75	60 / 87 / 89
T20S R46W 6th PM	100%	unnamed	9	39 / 73 / 420	—	—
T21S R41W 6th PM	100%	unnamed	6	124 / 156 / 188	—	—
T24S R44W 6th PM	100%	unnamed	10	186 / 465 / 630	—	—
T24S R49W 6th PM	100%	unnamed	7	235 / 320 / 426	—	—
T26S R50W 6th PM	100%	unnamed	9	41 / 185 / 346	23 / 165 / 230	43 / 185 / 266
T28S R51W 6th PM	100%	unnamed	9	69 / 80 / 106	—	—
T25S R44W 6th PM	92%	unnamed	8	49 / 162 / 346	—	—
T27S R41W 6th PM	100%	other named	5	397 / 417 / 437	—	—
T27S R50W 6th PM	100%	unnamed	8	35 / 130 / 256	—	—
T30S R53W 6th PM	55%	unnamed	9	30 / 70 / 125	—	—
T15S R46W 6th PM	58%	unnamed	6	28 / 36 / 140	—	—
T17S R42W 6th PM	75%	unnamed	5	95 / 120 / 184	—	—
T17S R44W 6th PM	100%	Ogallala / High Plains	6	114 / 139 / 155	—	—
T20S R45W 6th PM	100%	unnamed	8	40 / 60 / 132	—	—
T26S R44W 6th PM	100%	unnamed	8	89 / 132 / 286	—	—
T19S R44W 6th PM	100%	unnamed	7	72 / 100 / 1,187	—	—
T19S R50W 6th PM	100%	unnamed	6	78 / 95 / 102	—	—
T21S R49W 6th PM	100%	unnamed	6	70 / 352 / 658	—	—
T19S R45W 6th PM	100%	unnamed	5	47 / 68 / 190	—	—
T22S R41W 6th PM	100%	unnamed	5	155 / 380 / 484	—	—

These columns on the map · Plate 6 of the Driller’s Atlas.

The Driller’s Atlas · Plate 2 A cross-section nobody surveyed

Every permitted well within a few miles of the line, drawn from the ground to its drilled depth as the driller filed it. The bright part of each stroke is the perforated casing — where the well actually takes water — coloured by the aquifer named on the permit. Nobody arranged these; the aquifers arrange themselves.

Line Corridor

Hover or arrow through the strokes to read a well.

The same corridor as a table


Miles from A	Wells drawn	Median depth (ft)	With a screen	Most-named aquifer	No depth filed	Ground, ft above sea level (median)

Bins run from end A to end B of the line. “Most-named aquifer” is the family most often named on permits in the bin, with its count; permits naming no aquifer are the majority of the file and are not a family.

Reservoirs

Source DWR administrative record · verify at DWR structure records ↗

22 reservoir(s) with 5,916 storage measurement(s), 1949–2026. Basin storage as of 2025-10-31 (the record's own end — reservoir records publish ~annually): 1,464 AF across 5 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)
▸ NEENOSHE RESERVOIR (6703883)	26,000	2007-10-23	—	—	dossier →
▸ JOHN MARTIN RESERVOIR (6703512)	16,152	2012-10-31	—	—	dossier →
▸ GP RANCHES WEST FARM GRAVEL PIT (6706650)	1,413	2025-10-31	—	—	dossier →
▸ WM D PURSE RES NO 1 (6703596)	200	2010-02-23	—	—	dossier →
▸ MUDDY CREEK RESERVOIR (6703597)	149	1963-07-01	—	—	dossier →
▸ DINGWALL REGULATING RESERVOIR (6703536)	116	2010-10-26	—	—	dossier →
▸ L G KINNEY RESERVOIR (6703540)	40	2025-10-31	—	—	dossier →
▸ R R RUTHERFORD RESERVOIR (6703600)	25	2010-02-23	—	—	dossier →

Drought

Source Our computation, no independent reference · computed here from the screened DWR record Source Independent agency measurement · fetched 2026-10-06 · verify at U.S. Drought Monitor ↗

Right now

This is the 94th-driest week 39 in 111 years of record at ARKANSAS RIVER AT LAMAR, CO. (as of 2026-09-21; this week’s flow sits at the 85th percentile for the date). On this week’s US Drought Monitor, Prowers County is 10% in D0 abnormally dry drought (2026-10-06). The law agrees: the most senior active call leaves 86% of this district’s decreed flow rights junior to the calling right this week.

Every year since 1913, week by week

Each thin row is a year at ARKANSAS RIVER AT LAMAR, 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.

This year against its analogs

Over the 39 weeks recorded so far, 2026’s weekly trace most resembles 2025 (mean gap 15.5 percentile points; next closest 1992 (16.6), 1981 (17.5)). The analog’s remainder is drawn as context — its ending is what happened to it, not a forecast for this year.

The Drought Monitor’s view since 2000

Mean share of area in each class across Bent, Prowers 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 2005 — 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 (808 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	Flows recovered	Water table back
the 2012-13 drought	2012-12-31 → 2013-09-23	38	16th (2013-04-22)	46 weeks	4 yr (144 wells, 50 still below)
the 2002 drought	2002-12-16 → 2003-09-29	41	14th (2003-04-07)	90 weeks	not yet (72 of 123 wells still below)
unnamed dry spell	1978-12-04 → 1979-09-10	40	7th (1979-04-02)	3 weeks	2 yr (224 wells, 39 still below)
the 1977 drought	1977-10-24 → 1978-09-04	45	5th (1978-03-13)	56 weeks	5 yr (230 wells, 62 still below)
the 1977 drought	1977-01-17 → 1977-07-04	24	23rd (1977-02-21)	117 weeks	6 yr (238 wells, 66 still below)
the 1977 drought	1976-01-26 → 1976-07-19	25	24th (1976-03-29)	167 weeks	11 yr (306 wells, 141 still below)
unnamed dry spell	1974-10-07 → 1975-10-06	52	12th (1975-01-06)	208 weeks	not yet (162 of 312 wells still below)
unnamed dry spell	1969-02-03 → 1969-06-23	20	23rd (1969-02-17)	2 weeks	5 yr (482 wells, 195 still below)
the 1963-64 drought	1963-09-16 → 1965-08-16	100	7th (1964-03-30)	0 weeks	8 yr (62 wells, 21 still below)
unnamed dry spell	1960-11-07 → 1961-06-05	30	16th (1961-02-06)	27 weeks	7 yr (136 wells, 49 still below)
the 1950s drought	1954-11-22 → 1955-09-26	44	8th (1955-03-14)	0 weeks	not yet (5 of 5 wells still below)
the 1950s drought	1954-01-18 → 1954-09-20	35	20th (1954-03-01)	51 weeks	not yet (5 of 5 wells still below)
the 1930s Dust Bowl drought	1939-08-21 → 1941-07-21	100	9th (1940-02-19)	4 weeks	—
the 1930s Dust Bowl drought	1937-08-02 → 1938-10-24	64	13th (1938-04-25)	147 weeks	—

Detected mechanically: the 26-week smoothed percentile below the 30th for at least 20 weeks; recovered on regaining the 50th. The water-table clock compares each monitoring well against its own pre-drought median (the 3 years before onset) and dates the year the median well got back — the aquifer remembers longest, and “still below” is a finding, not a gap. 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 $95,357,259 in drought-caused claims across Bent, Prowers counties — 23.2% of all insured crop losses there. The worst year was 2013 ($14,701,933).

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 (1,942 rights across 111 years of shared record), colored by that year’s wetness from the barcode above. Here the correlation is -0.21 — this basin tended to claim water in dry times, under scarcity pressure. 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.

Legal

Who serves it, who protects it

Two registers the site fetches on their own schedules, read for this district. Neither is a DWR record; each links its own page and its agency.

Public water systems here

Source Register of another agency · fetched 2026-10-06 · verify at EPA SDWIS ↗

25 systems touch this district (25 community systems reporting 23,042 people served, a figure that counts a wholesaler's customers twice); 3 of them carry an open health-based violation on EPA's record.

System	Serves	Source	Here
LAMAR CITY OF	7,500	Groundwater	98% of its area
LIMON TOWN OF	5,080	Groundwater	100% of its area
MAY VALLEY WA	1,500	Groundwater	100% of its area
SPRINGFIELD TOWN OF	1,378	Groundwater	100% of its area
HUGO TOWN OF	885	Groundwater	100% of its area
HOLLY TOWN OF	800	Groundwater	100% of its area
CALHAN TOWN OF	780	Groundwater	100% of its area
EADS TOWN OF	656	Groundwater	100% of its area

and 17 more; the full directory filters by district.

Instream-flow rights held by the state

Source Register of another agency · fetched 2026-10-11 · verify at CWCB instream flow program ↗

1 reach over 5.1 miles, held by the Colorado Water Conservation Board so that water stays in the stream. Every reach, with its schedule and case →

Gageby Creek, 5.1 mi: 1 (1/1 - 12/31) cfs (appropriated 1975, 75W4270) · dossier

What the water is like -- USGS sensors right now, where it has been sampled, the impaired-waters list, and how the tap water here stands with EPA -- is on the Water quality tab.

Designated groundwater basins are on their own page.

Source Adjudicated record · verify at DWR water-right transactions ↗ Source Adjudicated record · verify at DWR net amounts ↗

Decreed rights on this network run from 1871-03-13 to 2018-10-30. Of the 20 structures with a yield estimate, the median one’s senior right was in priority 0% of a median irrigation season and 0% in a dry one. 7 abandonment screens and 23 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: 2337 across 2116 structure(s); 204 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: 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 (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	365	419	1866-05-01
2015	365	222	1865-10-07
2016	366	355	1862-04-30
2017	365	260	1866-10-31
2018	365	401	1862-04-30
2019	365	389	1862-03-20
2020	366	340	1861-05-31
2021	365	362	1862-04-30
2022	365	370	1862-11-15
2023	365	369	1862-04-30
2024	366	359	1862-04-30
2025	365	384	1862-04-30

Why diversions stopped — call-based explanations

Sustained diversion stops matched to senior administrative calls.

AMITY CANAL (MAY VALLEY) (6700520) DWR↗ stopped 2025-10-01 (30+ days) — call at MARTIN DITCH curtailing 100% of its decreed rate [heuristic-strong]
AMITY CANAL (MAY VALLEY) (6700520) DWR↗ stopped 2025-09-08 (8+ days) — call at CHILILI DITCH curtailing 100% of its decreed rate [heuristic-strong]
AMITY CANAL (6700607) DWR↗ stopped 2025-09-08 (15+ days) — call at CHILILI DITCH curtailing 100% of its decreed rate [heuristic-strong]
FLOYD VERHOEFF NO 2 (6700567) DWR↗ stopped 2025-08-10 (26+ days) — call at HARDSCRABBLE DITCH curtailing 100% of its decreed rate [heuristic-strong]
AMITY CANAL (6700607) DWR↗ stopped 2025-08-07 (21+ days) — call at HARDSCRABBLE DITCH curtailing 100% of its decreed rate [heuristic-strong]
AMITY CANAL (MAY VALLEY) (6700520) DWR↗ stopped 2025-07-26 (7+ days) — call at TITSWORTH DITCH curtailing 100% of its decreed rate [heuristic-strong]
WRIGHT BARKER IRRIGATION SYS NO 1 (6700512) DWR↗ stopped 2025-07-19 (83+ days) — call at MODEL DITCH curtailing 100% of its decreed rate [heuristic-strong]
IDEAL DITCH (6700555) DWR↗ stopped 2025-07-12 (29+ days) — call at LEWELLING-MCCORMICK curtailing 100% of its decreed rate [heuristic-strong]
SAYLER & NOWELLS DITCH (6700519) DWR↗ stopped 2025-05-25 (14+ days) — call at HOEHNE DITCH curtailing 100% of its decreed rate [heuristic-strong]
BUFFALO CANAL (BUFFALO) (6700557) DWR↗ stopped 2025-03-16 (8+ days) — call at CHILILI DITCH curtailing 100% of its decreed rate [heuristic-strong]
SAYLER & NOWELLS DITCH (6700519) DWR↗ stopped 2025-02-26 (74+ days) — call at MODEL DITCH curtailing 100% of its decreed rate [heuristic-strong]
DINGWALL DITCH (PROWERS) (6700543) DWR↗ stopped 2025-02-18 (5+ days) — call at MODEL 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
AMITY CANAL (6700607) DWR↗	1887-02-21	0.0% / 0.0%	0.0% / 0.0%
AMITY CANAL (GOULDS DR) (6700533) DWR↗	1893-04-01	0.0% / 0.0%	0.0% / 0.0%
AMITY CANAL (BIG BEND) (6700575) DWR↗	1893-04-01	0.0% / 0.0%	0.0% / 0.0%
AMITY CANAL (BIG SANDY) (6700672) DWR↗	1893-04-01	0.0% / 0.0%	0.0% / 0.0%
AMITY CANAL (MAY VALLEY) (6700520) DWR↗	1908-05-26	0.0% / 0.0%	0.0% / 0.0%
LAMAR CANAL (6700614) DWR↗	1875-11-30	0.0% / 0.0%	0.0% / 0.0%
FORT BENT CANAL (6700610) DWR↗	1886-04-01	0.0% / 0.0%	0.0% / 0.0%
BUFFALO CANAL (PUNTNEY) (6700505) DWR↗	1895-10-01	0.0% / 0.0%	0.0% / 0.0%
BUFFALO CANAL (BUFFALO) (6700557) DWR↗	1895-10-01	0.0% / 0.0%	0.0% / 0.0%
BUFFALO CANAL (DEADMAN) (6700565) DWR↗	1895-10-01	0.0% / 0.0%	0.0% / 0.0%
BUFFALO CANAL (HOUSE DR) (6700548) DWR↗	1895-10-01	0.0% / 0.0%	0.0% / 0.0%
BUFFALO CANAL (SIMPSON) (6700514) DWR↗	1895-10-01	0.0% / 0.0%	0.0% / 0.0%

Abandonment radar (7 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 ~2017 — idleness that begins before then may be unreported use, not nonuse (flagged † below).

GRAHAM DITCH (6700572) DWR↗ (1891-08-24, 61.0 cfs decreed): last active 1963 — 46 years idle † predates modern reporting era — last recorded activity predates this basin's modern reporting era (~2017) -- early absence of record is weak evidence of nonuse
CLINGINGSMITH OUTLET DITCH (6700513) DWR↗ (1954-07-31, 3.0 cfs decreed): last active 1970 — 39 years idle † predates modern reporting era — last recorded activity predates this basin's modern reporting era (~2017) -- early absence of record is weak evidence of nonuse
AMITY CANAL (BIG SANDY) (6700672) DWR↗ (1893-04-01, 510.0 cfs decreed): last active 1971 — 38 years idle † predates modern reporting era — last recorded activity predates this basin's modern reporting era (~2017) -- early absence of record is weak evidence of nonuse
R M RAY SEEP DITCH NO 1 (6700506) DWR↗ (1920-09-26, 2.8 cfs decreed): last active 1972 — 37 years idle † predates modern reporting era — last recorded activity predates this basin's modern reporting era (~2017) -- early absence of record is weak evidence of nonuse
NOWELS PIPELINE (6700594) DWR↗ (1920-08-10, 4.0 cfs decreed): last active 1972 — 37 years idle † predates modern reporting era — last recorded activity predates this basin's modern reporting era (~2017) -- early absence of record is weak evidence of nonuse
E R JONES SEEPAGE DITCH (6700644) DWR↗ (1920-09-26, 2.2 cfs decreed): last active 1972 — 37 years idle † predates modern reporting era — last recorded activity predates this basin's modern reporting era (~2017) -- early absence of record is weak evidence of nonuse
REYHER WELL NO 8 (6705011) DWR↗ (1965-03-15, 1.5 cfs decreed): last active 1973 — 36 years idle † predates modern reporting era — last recorded activity predates this basin's modern reporting era (~2017) -- early absence of record is weak evidence of nonuse

Compliance screens (23 advisory flags)

Screened 74 of 2116 structures with rights (85 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.

JOHN MARTIN RESERVOIR (6703512) DWR↗: Observed p99 daily rate 1062.8 cfs (max 6030.2) exceeds total decreed absolute 63.0 cfs across 33628 recorded day(s).
BUFFALO CANAL (ARKANSAS) (6700608) DWR↗: Observed p99 daily rate 90.0 cfs (max 171.8) exceeds total decreed absolute 67.5 cfs across 55364 recorded day(s).
THURSTON PIPELINE (6702500) DWR↗: Observed p99 daily rate 55.4 cfs (max 68.4) exceeds total decreed absolute 25.0 cfs across 180 recorded day(s).
IDEAL DITCH (6700555) DWR↗: Observed p99 daily rate 16.1 cfs (max 32.8) exceeds total decreed absolute 10.0 cfs across 4082 recorded day(s).
SISSON & STUBBS DITCH 1 (6700616) DWR↗: Observed p99 daily rate 15.0 cfs (max 25.0) exceeds total decreed absolute 7.0 cfs across 6571 recorded day(s).
GERALD VERHOEFF DITCH (6700544) DWR↗: Observed p99 daily rate 11.4 cfs (max 564.3) exceeds total decreed absolute 10.0 cfs across 9149 recorded day(s).
CALVIN FLINT DITCH NO 2 (6700559) DWR↗: Observed p99 daily rate 11.1 cfs (max 20.0) exceeds total decreed absolute 10.0 cfs across 4454 recorded day(s).
L G KINNEY DITCH (6700660) DWR↗: Observed p99 daily rate 11.1 cfs (max 11.1) exceeds total decreed absolute 3.0 cfs across 52 recorded day(s).
JAMES CUSHNY DITCH (6700579) DWR↗: Observed p99 daily rate 5.5 cfs (max 16.4) exceeds total decreed absolute 5.3 cfs across 2454 recorded day(s).
WAGNER & GILBERT P/L (6700593) DWR↗: Observed p99 daily rate 5.3 cfs (max 6.5) exceeds total decreed absolute 5.0 cfs across 282 recorded day(s).

Seniority (top structures by decreed rate)

Structure	Senior priority date	Rights	Decreed abs (cfs)	Decreed abs (AF)	Conditional?
AMITY CANAL (6700607) DWR↗	1887-02-21	3	783.5	0	yes
AMITY CANAL (GOULDS DR) (6700533) DWR↗	1893-04-01	2	700.0	0	yes
AMITY CANAL (BIG BEND) (6700575) DWR↗	1893-04-01	2	700.0	0	yes
AMITY CANAL (BIG SANDY) (6700672) DWR↗	1893-04-01	2	510.0	0	yes
AMITY CANAL (MAY VALLEY) (6700520) DWR↗	1908-05-26	3	503.6	0	yes
LAMAR CANAL (6700614) DWR↗	1875-11-30	4	285.8	0	—
FORT BENT CANAL (6700610) DWR↗	1886-04-01	6	228.5	0	—
BUFFALO CANAL (PUNTNEY) (6700505) DWR↗	1895-10-01	1	135.0	0	—
BUFFALO CANAL (BUFFALO) (6700557) DWR↗	1895-10-01	1	135.0	0	—
BUFFALO CANAL (DEADMAN) (6700565) DWR↗	1895-10-01	1	135.0	0	—
BUFFALO CANAL (HOUSE DR) (6700548) DWR↗	1895-10-01	1	107.0	0	—
BUFFALO CANAL (SIMPSON) (6700514) DWR↗	1895-10-01	1	105.0	0	—
X-Y IRRIGATING DITCH (6700617) DWR↗	1889-07-22	1	69.0	0	—
BUFFALO CANAL (ARKANSAS) (6700608) DWR↗	1885-01-29	1	67.5	0	—
JOHN MARTIN RESERVOIR (6703512) DWR↗	1871-03-13	13	63.0	357385	—

Recent inventory & legal-document changes

2026-10-10 — call set: FORT LYON CANAL (39703)
2026-10-10 — call set: JOHN MARTIN RESERVOIR (39705)
2026-10-10 — call released: 39701
2026-10-10 — call released: 39694
2026-10-09 — call set: FORT LYON CANAL (39701)
2026-10-09 — call released: 39660
2026-10-09 — call released: 39675
2026-10-09 — call released: 39659

Water-court filings this month (division-wide)

3 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 (19 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 3 filings, with excerpts

Case	What it asks	County	Excerpt
`2025CW3012`	plan for augmentation, new underground right	—	CASE NO. 2025CW3012; TITAN AU, INC., 8480 E. Orchard Rd., Suite 4900, Greenwood Village, CO 80111 (Please address all pleadings and inquiries regarding this matter to Applicant’s attorney: John T. Howe, Hoskin, Farina & Kampf, P.C., 200 Grand Avenue, Suite 400…
`2026CW3037` 1603718	—	—	CASE NO. 2026CW3037; MARIA LAKES GRAZING ASSOCIATION, LLC, c/o Donald E. Siecke, Manager, 7343 S. Alton Way, Ste. 100, Centennial, CO 80122 (Please address all pleadings and inquiries regarding this matter to Applicant’s attorneys: Karl D. Ohlsen, Beth Ann J. …
`2026CW3138`	reasonable diligence	OF REASONABLE DILIGENCE IN PARK	CASE NUMBER 2026CW3138 MICHAEL STALL, 77 Sugar Creek Center Blvd., # 210, Sugar Land, TX, 77478. Philip E. Lopez, Eric K. Trout, Fairfield and Woods, P.C., 1801 California St, Suite 2600, Denver, CO, 80202. APPLICATION FOR A FINDING OF REASONABLE DILIGENCE IN …

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
LAWMA - COLORADO BEEF WELLS	37-92-308(4) PLAN PENDING COURT APPLICATION	Approved	2027-03-31	6707838	plan file
LAWMA - REYHER WELLS	37-92-308(4) PLAN PENDING COURT APPLICATION	Approved	2027-03-31	6707874	plan file
LAWMA NOVA SOMINA	37-92-308(5) PLANS LESS THAN 5 YEARS	Approved	2027-03-31	6707846	plan file
GP AGGREGATES WEST FARM PIT	37-90-137(11) GRAVEL PIT PLAN	Approved	—	6707828	plan file
LANCE VERHOEFF POND	37-92-308(5) PLANS LESS THAN 5 YEARS	Approved	—	6707844	plan file
LAMAR, CITY OF WILLOW CREEK POND	37-92-308(4) PLAN PENDING COURT APPLICATION	Decreed	—	6707857	plan file
WERTZ BRENT AND LAWMA	37-92-308(4) PLAN PENDING COURT APPLICATION	Additional Info Needed	—	6707840	plan file
KICT, LLC	37-90-137(11) GRAVEL PIT PLAN	Withdrawn	—	6707877	plan file

Water quality

The water itself, in this district

Four registers, each on its own schedule: what USGS sensors read right now, where samples have been taken, which stretches the state lists as impaired, and how the tap water of the systems here stands with EPA. None is a DWR record; each links its own page.

Right now

Source Provisional telemetry · fetched 2026-10-12 · verify at USGS current conditions ↗

1 USGS sensor reports temperature, conductance, dissolved oxygen or turbidity from inside this district; provisional readings, never merged into the verified record.

Site	Temp °C	Cond µS/cm	DO mg/L	Turb FNU	As of
ARKANSAS RIVER BELOW JOHN MARTIN RESERVOIR, CO.	18.2	1300			2026-10-12 15:00

Where water has been sampled

Source Register of another agency · fetched 2026-10-08 · verify at Water Quality Portal ↗

The portal lists 2,941 sampling stations in this district's watersheds (Upper Arkansas-John Martin Reservoir 11020009, 36% of the district; Big Sandy 11020011, 22% of the district; Rush 11020012, 16% of the district; Bear 11040005, 11% of the district; Two Butte 11020013, 9% of the district; Whitewoman 11030002, 4% of the district), of which 83 reported a sample in the last 5 years on the state and tribal side (USGS activity is in the station count, not in that figure). Most active: Colorado Dept. of Public Health & Environment-WQCD (44), Lower Arkansas Valley Water Conservation District (28), Colorado River Watch (7). Most-sampled groups: Inorganics, Major, Metals, Physical, Nutrient, Inorganics, Minor, Non-metals. Every station as a file ↗

Results themselves are not fetched here; USGS samples added after March 2024 may not be in the portal's legacy profiles yet.

Drinking water

Source Register of another agency · fetched 2026-10-07 · verify at EPA SDWIS ↗

25 community systems touch this district. 3 carry an open health-based violation on EPA's record; 2 are listed by EPA as serious violators. EPA sampled 2 of them for PFAS in 2023–25; none had PFOA or PFOS at or above the 2024 limit.

System	Serves	EPA record	PFAS (UCMR 5)	Lead, latest 90th pct
HARTMAN TOWN OF	61	3 open health-based	not sampled	0.0 mg/L
HASTY WATER AUTHORITY	244	1 open health-based	not sampled	0.004 mg/L
TWO BUTTES TOWN OF	64	1 open health-based	not sampled	0.0025 mg/L
LAMAR CITY OF	7,500	clean, last 12 quarters	2 detected, under the limits	0.004 mg/L
LIMON TOWN OF	5,080	2 of 12 quarters with a violation	none detected	0.0 mg/L
MAY VALLEY WA	1,500	11 of 12 quarters with a violation	not sampled	0.002 mg/L
SPRINGFIELD TOWN OF	1,378	3 of 12 quarters with a violation	not sampled	0.001 mg/L
HUGO TOWN OF	885	4 of 12 quarters with a violation	not sampled	0.003 mg/L
HOLLY TOWN OF	800	11 of 12 quarters with a violation	not sampled	0.0 mg/L
CALHAN TOWN OF	780	6 of 12 quarters with a violation	not sampled	0.0011 mg/L

and 15 more; the full directory filters by district.

EPA's record carries violations and lead/copper percentiles; nitrate and disinfection by-product results are not in it. UCMR 5 samples are monitoring, not compliance, and the 2024 PFOA/PFOS limits equal its reporting limit, so any detection of those two is at or above them.

Impaired waters

Source Register of another agency · verify at EPA ATTAINS ↗

The state's 303(d) impaired-waters list has not been joined to this basin's own watershed boundary yet, so nothing is shown rather than a guess; the basins with a join carry the full list here. Why the join is geometry, not a name match.

Call cascade

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.

This week's diagnostic

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System status

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Active river calls

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Hydrographs vs. historical envelope

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Anomaly flags

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Topology cross-check: 12 parent disagreements, 14 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 29 streams, 17 agree. Know this water? Tell us →

Stream	This site routes it to	DWR routes it to
Antelope Creek	the mainstem	Big Sandy Creek
Antelope Creek	the mainstem	South Rush Creek
Middle Rush Creek	the mainstem	Rush Creek
Rush Creek	the mainstem	Big Sandy Creek
Antelope Creek	the mainstem	West Mud Creek
Antelope Creek	the mainstem	Muddy Creek
Cottonwood Creek	the mainstem	Rule Creek
Buffalo Creek	the mainstem	no parent named

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

Caddoa Creek (55 mi) · Mud Creek (47 mi) · Wolf Creek (37 mi) · Clay Creek (33 mi) · Gageby Creek (11 mi) · Wiley Drainage Ditch (10 mi) · Cheyenne Creek (7 mi) · McRae Arroyo (6 mi)

Something wrong on this page? Tell us →

Arkansas: Las Animas to Stateline

Schematic

Historical

Evolution of the network

Trends

This year, in context

Gage flow trend & changepoints

How the measurement network itself changed

Mass-balance (network closure) trend

Reach gain/loss shifts (1950–2026)

Cross-gage pattern fingerprint

Structures most implicated by reconciliation (as of 2026-09-27)

Data provenance & quality

Groundwater

Well map

3D aquifer x-ray

Water-table trends

Stream corridors — the surface connection

Permits issued here, by year

What drillers reached, township by township

Reservoirs

Reservoir map — how full is each vessel?

Basin storage, end of each water year

Largest reservoirs on record

Drought

Right now

Every year since 1913, week by week

This year against its analogs

The Drought Monitor’s view since 2000

The law’s own drought gauge

This basin’s droughts, by its own record

What drought has cost here

When this basin claimed its water

Legal

Who serves it, who protects it

Public water systems here

Instream-flow rights held by the state

Is the river getting harder to divert from?

Why diversions stopped — call-based explanations

Right yield — how often could these rights actually divert?

Abandonment radar (7 screens)

Compliance screens (23 advisory flags)

Seniority (top structures by decreed rate)

Recent inventory & legal-document changes

Water-court filings this month (division-wide)

Active substitute water supply plans in this district

Water quality

The water itself, in this district

Right now

Where water has been sampled

Drinking water

Impaired waters

Call cascade

Pick a calling right

This week's diagnostic

System status

Active river calls

Hydrographs vs. historical envelope

Anomaly flags

Keep track of Colorado’s water?