Hydrohistorian
Piedra River Basin on the ground — the ditches, wells, reservoirs and gages of Water District 78 · clicktap anything for its record
Snowpack — no snow on the ground at 1 SNOTEL site — normal for the date; the snow year begins in October and typically peaks around March 28. Runoff outlook — Piedra R nr Arboles: even odds of at least 14 kAF over 06-01 to 07-31 — 24% of a normal season, per NRCS, issued 2026-06-01 — the season’s final; new forecasts begin in January. Full snow & runoff picture — charts, forecast history and how the forecasts have verified →
Sites, exceedance bands and sources
| SNOTEL site | Elev (ft) | SWE (in) | Median (in) | % of median | Typical peak |
|---|---|---|---|---|---|
| Weminuche Creek | 10730 | 0.0 | 0.0 | — | March 28 (16.4 in) |
Piedra R nr Arboles — 06-01 to 07-31 volume, thousand acre-feet (chance the volume is AT LEAST this):
| 90% | 70% | 50% | 30% | 10% | Normal |
|---|---|---|---|---|---|
| 6 | 10 | 14 | 25 | 40 | 58 |
Snow-water equivalent and medians (1991–2020) from NRCS SNOTEL; seasonal volume forecasts from the NRCS National Water and Climate Center. Sites and forecast points are assigned to the district whose boundary contains them — snowpack that feeds this district can also sit in a neighboring headwater district. Toggle the Snow chip on the map above to see the sites.
Topology cross-check: 4 parent disagreements, 2 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 9 streams, 5 agree. Know this water? Tell us →
| Stream | This site routes it to | DWR routes it to |
|---|---|---|
| Yellowjacket Creek | the mainstem | Piedra River |
| Devil Creek | the mainstem | Piedra River |
| Dutton Creek | the mainstem | Martinez Creek |
| Ignacio Creek | the mainstem | Piedra River |
Sizable streams DWR maps here that this network does not carry:
Martinez Creek (16 mi) · Archuleta Creek (6 mi)
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.
Schematic
Historical
Evolution of the network
Trends
This year, in context
In the weeks around 2026-07-06 (the newest reading on file), flows at the 1 ranked gage are running at a median 10% of their own long-term norm for this window — 1 below a typical year, 0 at or above. Driest relative to its record: SOUTH RIVER PEAK DITCH, ranking 2nd lowest of 4 years.
How this comparison is made
Each gage's mean flow over the 3 days either side of 2026-07-06, compared with the same window in every year of its own record — so a gage is only ever measured against itself, and gages with no record in the window are counted out rather than guessed.
Gage flow trend & changepoints
What counts as a trend here
Computed 2026-08-30 21:22 from 10 gage(s) with cached period-of-record data. The series is each gage's annual mean flow in cfs (years with ≥300 days of record). Mann-Kendall (trend, with the Hamed–Rao correction for serial correlation — persistence can otherwise fake significance) and Pettitt (changepoint) both require at least 8 years spanning at least 10 years of record. A gage below that reports no signal — which is not the same as “no change.” The %-per-decade figure is the same Sen slope divided by the gage's median annual flow, for comparing across streams of very different size; it is omitted for near-ephemeral channels where the median is too small to divide by honestly.
None of the 10 gages with enough record shows a significant trend or a detected shift — which is itself the finding.
No gage shows a statistically significant trend or changepoint yet.
10 other gage(s) show no significant trend or changepoint (not shown).
How the measurement network itself changed
This basin was not always measured the way it is today — the API-era record is dense and recent, the early record sparse. 2 gage(s) and 58 structure(s) report in 2026, but structure reporting only reached half its modern level around ~1974. Every historical claim below is checked against this: long-term shifts that co-move with the growth of the network carry an explicit measurement-evolution caution, and abandonment screens whose idleness begins before the modern reporting era are flagged †.
| Decade | Gages with data (median yr) | Structures reporting (median yr) |
|---|---|---|
| 1930s | 3 | 0 |
| 1940s | 4 | 0 |
| 1950s | 2 | 0 |
| 1960s | 2 | 32 |
| 1970s | 2 | 67 |
| 1980s | 1 | 86 |
| 1990s | 2 | 88 |
| 2000s | 2 | 94 |
| 2010s | 2 | 62 |
| 2020s | 2 | 58 |
Mass-balance (network closure) trend
Structure divrec-history backfill coverage as of the last check: 17% of 249 schematic-relevant structures. 0 year(s) clear the 30% coverage gate so far -- the trend activates automatically once qualifying years span a full decade. No action needed; the nightly backfill keeps extending the record.
Reach gain/loss shifts (–)
Mass-balance kinks computed for every summer month back to (0 reach-snapshots) — which reaches gain or lose water, and how that has shifted across decades. Each shift is cross-checked against the observation record above: as more diversions became metered, "unaccounted" water shrinks mechanically, which can masquerade as a hydrologic shift.
No reach shows a statistically significant long-term gain/loss shift.
Groundwater now has its own tab: 44 monitored well(s), water-table trends, stream corridors, and the advisory depletion screen.
Reservoirs now has its own tab: 28 reservoir(s), end-of-year storage back to 1970, click-to-chart histories.
Cross-gage pattern fingerprint
Not enough gages with a long enough common-coverage window yet to fingerprint shared patterns.
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 | 17% of schematic structures have data |
Independent check: PASS — 100.0000% agreement across 154,523 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 — 99.52% day-level agreement with USGS's own published records for the same gages, across 7 co-listed station(s) and 50,101 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.
10 gage(s) / 60,035 daily values (1936-10-01–2026-07-06); 170 structure(s) with diversion records; 366 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
243 water-level measurements across 44 monitored well(s) — 33 alluvial, 0 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 1 well(s) with enough record for a trend test: 1 declining, 0 rising.
| Fastest-declining wells | Setting | ft / decade | Span | p |
|---|---|---|---|---|
| ▸ WS-25 | alluvial | -0.53 | 42 yr | 0.0043 |
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.
Reservoirs
28 reservoir(s) with 5,424 storage measurement(s), 1970–2024. Basin storage as of 2023-10-31 (the record's own end — reservoir records publish ~annually): 14,465 AF across 8 reservoir(s).
Why storage matters to the flow network
Storage change is real water the mass balance must credit — a losing reach beside a filling reservoir isn't losing water, it's banking it.
Reservoir map — how full is each vessel?
What “full” is measured against
Bubble size is proportional to a reservoir's record-high storage. Fill is its last recorded storage as a share of its surveyed capacity (USACE National Inventory of Dams) where a confident NID match exists — the tooltip names the matched dam — and as a share of its own record high otherwise. A wrong capacity would be worse than an honest record high, so only confident joins upgrade.
A dashed teal ring marks reservoirs reporting live DWR telemetry: their fill reflects yesterday's storage, is drawn as a dotted tail on charts, and is treated as provisional until the next verified HydroBase snapshot supersedes it.
A dashed red ring marks a dam under an active storage restriction from DWR's Dam Safety branch — the State Engineer has limited how much it may legally store, so a low fill can be an order, not a drought. Hazard class and inspection condition come from the same record, joined only where the dam carries this reservoir's WDID or a confident NID match — a wrong dam's restriction would be worse than none shown.
Basin storage, end of each water year
End-of-water-year totals; per-year reservoir counts shown because reporting coverage varies -- a total is only comparable to years with similar counts.
Largest reservoirs on record
Click a row to chart its full storage history, or open its dossier for rights, documents and dam-safety facts.
| Reservoir | Last recorded storage (AF) | As of | Full | Dam (DWR Dam Safety) | |
|---|---|---|---|---|---|
| ▸ WILLIAMS CREEK RESERVOIR (7803642) | 8,482 | 2023-10-31 | — | — | dossier → |
| ▸ STEVENS RESERVOIR DAM (7803645) | 1,825 | 2022-10-31 | — | — | dossier → |
| ▸ G S HATCHER RESERVOIR (7803626) | 1,635 | 2022-10-31 | — | — | dossier → |
| ▸ LINN AND CLARK RESERVOIR (7803629) | 1,239 | 2022-10-31 | — | — | dossier → |
| ▸ TOWN CENTER LAKE (7803646) | 641 | 2022-10-31 | — | — | dossier → |
| ▸ LAKE FOREST (7803644) | 452 | 2022-10-31 | — | — | dossier → |
| ▸ PARGIN RESERVOIR (7803633) | 337 | 2011-10-31 | — | — | dossier → |
| ▸ PINON LAKE (7803636) | 125 | 2022-10-31 | — | — | dossier → |
Snow and runoff
Snow-water equivalent, WY2026
No snow on the ground — normal for the date; the snow year begins in October. The chart shows the full water year just ending.
| SNOTEL site | Elev (ft) | SWE (in) | Median (in) | % of median | Typical peak |
|---|---|---|---|---|---|
| Weminuche Creek | 10730 | 0.0 | 0.0 | — | March 28 (16.4 in) |
NRCS SNOTEL, daily. Sites are assigned to the district whose boundary contains them — the snow that feeds this district can also sit in a neighboring headwater district.
Two ways a snow year goes wrong (2011–2026)
A bad snow year here comes in two flavors (both called snow droughtA winter that shorts the snowpack. It happens two ways: a dry one, where the snow never comes, and a warm one, where near-normal snow falls but melts off weeks early -- and the river feels them differently.), and the river feels them differently. In 4 of the last 16 winters the snow never came — the pack peaked below 80% of its median. In 1 more, the snow came but left early — a near-normal peak melted out two weeks or more ahead of its usual date, sending the water down before the season needed it. This year was one of the dry ones: the pack peaked at 53% of median.
The snow never came: 2018, 2022, 2025, 2026. The snow left early: 2012.
Computed by this site from 1 SNOTEL site’ full daily records (NRCS AWDB, back to 2011). Each year is measured against each site’s own multi-decade median — not the 1991–2020 normal the chart above uses — so the 1980s grade against a fair baseline. Peak and melt-out need 85% of the season’s days on the record; thin years are dropped, not guessed. Derived from snow measurements alone — it cannot tell dry-from-warm causes apart, only what the snowpack did.
Runoff outlook — Piedra R nr Arboles
NRCS's final issue (2026-06-01) calls it even odds that at least 14 kAF arrives over 06-01 to 07-31 — 24% of a normal season; almost certainly at least 6, probably not more than 40. Our own record at this gage shows 6 kAF actually delivered (partial record: 17 of 61 days). New forecasts begin in January. How to read these numbers →
| 90% chance of at least | 70% chance of at least | 50% chance of at least | 30% chance of at least | 10% chance of at least | Normal | Observed |
|---|---|---|---|---|---|---|
| 6 | 10 | 14 | 25 | 40 | 58 | 6 |
How good are these forecasts here? (1963–2025)
Grading every April issue against what the river then delivered, measured at this gage’s own record — 62 seasons: the median miss of the 50% forecast is 16%, with a high bias of 2%, and the observed volume landed inside the stated 10–90% band 91% of the time (a calibrated forecast would say 80%).
Computed by this site: NRCS's archived April issues (their period as issued each year) against the observed volume in DWR’s published record; years with under 90% daily coverage are dropped, not summed. A grade of the forecast, never of the forecasters — these are hard rivers. How this point ranks among every graded Colorado forecast point →
What April snow has meant for this river (2011–2025)
Across 15 measured years, the season’s water has closely followed the April snowpack: a year opening April with 80% of median snow has typically gone on to deliver about 62% of a normal season (a snow-to-runoff elasticityHow strongly one number moves with another. A snow-to-runoff elasticity of 1.5 means a 10% shortfall in April snowpack has typically become a 15% shortfall in the season's water. of 1.0). In warm, early-melt years the river delivered a median of 59% of a normal season, against 92% in typical years — the timing of the melt matters, not just its size.
Computed by this site: the district’s April 1 SWE (% of each SNOTEL site’s own-record median) against the observed April–July volume at this gage (% of its median season) — a fixed window every year, unlike the forecast grades above, which use each issue’s own period. The slope is fit so single wild years can’t steer it (Theil–Sen, log space); years missing 10% of their days are dropped.
Legal
Decreed rights on this network run from 1868-03-02 to 2025-06-27. Of the 20 structures with a yield estimate, the median one’s senior right was in priority 2% of a median irrigation season and 0% in a dry one. 25 abandonment screens and 85 compliance flags are listed below as leads for review — a screen is not an abandonment and a flag is not a violation.
Rights on file: 435 across 366 structure(s); 64 structure(s) carry 0 court-case references. Advisory reading aids on public DWR data — not administrative or legal conclusions.
Is the river getting harder to divert from?
Over 2003–2025, administration on this district has been tightening: 1 of 3 measures (days under call, calls set, seniority of the controlling call) are moving toward more administration, none the other way.
The three measures, year by year
One row per whole calendar year inside the call record's coverage (23 years); partly-covered years are omitted rather than reported as quiet. Trend is Mann-Kendall with the same significance gate as every other trend on this site. Counted from DWR's published call record, which begins in the early 2000s: earlier years are absent, not quiet. A rise in the number of calls set can also reflect how finely an administrator records one episode, which is why days under call -- insensitive to that -- is the component to read first. Advisory summary of the public record, not an administrative finding.
| Year | Days under call | Calls set | Controlling priority (median) |
|---|---|---|---|
| 2014 | 319 | 117 | 1883-05-15 |
| 2015 | 316 | 90 | 1899-05-13 |
| 2016 | 273 | 94 | 1888-02-08 |
| 2017 | 297 | 98 | 1904-01-02 |
| 2018 | 285 | 164 | 1878-05-15 |
| 2019 | 186 | 53 | 1880-06-01 |
| 2020 | 240 | 171 | 1986-11-23 |
| 2021 | 246 | 143 | 1876-11-01 |
| 2022 | 261 | 161 | 1888-03-20 |
| 2023 | 198 | 82 | 1880-06-01 |
| 2024 | 231 | 114 | 1876-10-10 |
| 2025 | 281 | 169 | 1888-03-20 |
Why diversions stopped — call-based explanations
Sustained diversion stops matched to senior administrative calls.
- FARROW AND PETERSON D (7800545) DWR↗ stopped 2025-09-17 (44+ days) — call at HENRY BOLEN DITCH curtailing 100% of its decreed rate [heuristic-strong]
- CARL AND WEBB DITCH (7800523) DWR↗ stopped 2025-09-15 (46+ days) — call at HENRY BOLEN DITCH curtailing 100% of its decreed rate [heuristic-strong]
- F S MOCKLER IRR DITCH (7800544) DWR↗ stopped 2025-09-04 (57+ days) — call at SPRING CREEK DITCH curtailing 100% of its decreed rate [heuristic-strong]
- BIG PAGOSA DITCH (7800510) DWR↗ stopped 2025-09-01 (60+ days) — call at HENRY BOLEN DITCH curtailing 100% of its decreed rate [heuristic-strong]
- BARNES-MEUSER AND SHAW D (7800507) DWR↗ stopped 2025-08-24 (68+ days) — call at HENRY BOLEN DITCH curtailing 100% of its decreed rate [heuristic-strong]
- HOSSACK CREEK DITCH (7800562) DWR↗ stopped 2025-08-24 (68+ days) — call at HENRY BOLEN DITCH curtailing 100% of its decreed rate [heuristic-strong]
- BURKHARD DITCH (7800515) DWR↗ stopped 2025-08-06 (86+ days) — call at HENRY BOLEN DITCH curtailing 100% of its decreed rate [heuristic-strong]
- GRIMES DITCH (7800557) DWR↗ stopped 2025-08-06 (86+ days) — call at HENRY BOLEN DITCH curtailing 100% of its decreed rate [heuristic-strong]
- J C R DITCH (7800565) DWR↗ stopped 2025-08-03 (14+ days) — call at HENRY BOLEN DITCH curtailing 100% of its decreed rate [heuristic-strong]
- GALLEGOS HOME DITCH (7800552) DWR↗ stopped 2025-07-10 (12+ days) — call at HENRY BOLEN DITCH curtailing 100% of its decreed rate [heuristic-strong]
- BENNETT DITCH (7800509) DWR↗ stopped 2025-07-09 (114+ days) — call at HENRY BOLEN DITCH curtailing 100% of its decreed rate [heuristic-strong]
- DYKE NO 1 DITCH (7800539) DWR↗ stopped 2025-06-27 (59+ days) — call at HENRY BOLEN DITCH curtailing 100% of its decreed rate [heuristic-strong]
Right yield — how often could these rights actually divert?
Share of irrigation-season days each structure's rights were not called out, derived from the 22-year district-scoped call record (senior right = floor, junior right = ceiling constraint). Call-record-derived; DWR's own analysis governs where available.
| Structure | Senior priority | Senior right: median / dry yr | Junior right: median / dry yr |
|---|---|---|---|
| PIEDRA RIVER MIN FLOW (7801910) DWR↗ | 1979-03-14 | 2.3% / 0.0% | 2.3% / 0.0% |
| PIEDRA RIVER MIN FLOW (7801903) DWR↗ | 1978-03-16 | 2.3% / 0.0% | 2.3% / 0.0% |
| PIEDRA RIVER MIN FLOW (7801902) DWR↗ | 1978-03-16 | 2.3% / 0.0% | 2.3% / 0.0% |
| PIEDRA RIVER MIN FLOW (7801901) DWR↗ | 1978-03-16 | 2.3% / 0.0% | 2.3% / 0.0% |
| LINN AND CLARK DITCH (7800578) DWR↗ | 1902-06-14 | 4.4% / 0.0% | 4.4% / 0.0% |
| PIEDRA RIVER MIN FLOW (7801900) DWR↗ | 1978-03-16 | 2.3% / 0.0% | 2.3% / 0.0% |
| PIEDRA FALLS DITCH (7800604) DWR↗ | 1934-07-18 | 2.3% / 0.0% | 2.3% / 0.0% |
| LITTLE PAGOSA CREEK DIVR (7800659) DWR↗ | 1939-12-31 | 2.3% / 0.0% | 2.3% / 0.0% |
| BARNES-MEUSER AND SHAW D (7800507) DWR↗ | 1903-12-31 | 2.3% / 0.0% | 2.3% / 0.0% |
| BUCKSKIN-NAILOR DITCH (7800513) DWR↗ | 1900-03-20 | 19.8% / 0.0% | 2.3% / 0.0% |
| PERKINS DITCH - STOLLSTEIMER CREEK (7800600) DWR↗ | 1963-07-28 | 2.3% / 0.0% | 2.3% / 0.0% |
| WEMINUCHE CR MIN FLOW (7801909) DWR↗ | 1978-03-16 | 2.3% / 0.0% | 2.3% / 0.0% |
Abandonment radar (25 screens)
Absolute rights with 10+ years of no recorded diversions. Screens only — storage, alternate points, and plan operations can explain nonuse lawfully. And diversion REPORTING itself only reached its modern level ~1974 — idleness that begins before then may be unreported use, not nonuse (flagged † below).
- STEVENS SPRING (7800735) DWR↗ (1999-04-10, 0.0 cfs decreed): last active 1968 — 57 years idle † predates modern reporting era — last recorded activity predates this basin's modern reporting era (~1974) -- early absence of record is weak evidence of nonuse
- BUCY WATER LINE (7800514) DWR↗ (1963-07-07, 0.0 cfs decreed): last active 1970 — 55 years idle † predates modern reporting era — last recorded activity predates this basin's modern reporting era (~1974) -- early absence of record is weak evidence of nonuse
- HERSCH DITCH (7800561) DWR↗ (1949-08-01, 8.0 cfs decreed): last active 1970 — 55 years idle † predates modern reporting era — last recorded activity predates this basin's modern reporting era (~1974) -- early absence of record is weak evidence of nonuse
- MARTIN SPG D AND PL NO 1 (7800581) DWR↗ (1928-07-15, 1.0 cfs decreed): last active 1974 — 51 years idle
- PIEDRA STATION PIPE LINE (7800606) DWR↗ (1913-10-01, 0.1 cfs decreed): last active 1974 — 51 years idle
- SANDFORD WATERLINE (7800615) DWR↗ (1968-09-01, 0.0 cfs decreed): last active 1974 — 51 years idle
- YELLOW JACKET PIPE LINE (7800651) DWR↗ (1912-06-10, 0.1 cfs decreed): last active 1974 — 51 years idle
- LINN AND CLARK RESERVOIR (7803629) DWR↗ (1902-06-14, 0.0 cfs decreed): last active 1974 — 51 years idle
- J B MARTINEZ DITCH (7800564) DWR↗ (1883-06-14, 1.2 cfs decreed): last active 1975 — 50 years idle
- TRES PIEDRAS DITCH (7800639) DWR↗ (1943-10-01, 2.0 cfs decreed): last active 1975 — 50 years idle
Compliance screens (85 advisory flags)
Screened 118 of 366 structures with rights (139 have diversion history on file). A flag is a lead for expert review — augmentation plans, exchanges, and free-river conditions can make over-decree diversions lawful and are deliberately not modeled.
- PIEDRA FALLS DITCH (7800604) DWR↗: Observed p99 daily rate 26.1 cfs (max 33.0) exceeds total decreed absolute 26.0 cfs across 25808 recorded day(s).
- GORDON CREEK WETLANDS DIVERSION DITCH (7800756) DWR↗: Observed p99 daily rate 20.0 cfs (max 20.0) exceeds total decreed absolute 4.0 cfs across 1681 recorded day(s).
- FARROW AND PETERSON D (7800545) DWR↗: Observed p99 daily rate 18.4 cfs (max 23.3) exceeds total decreed absolute 16.6 cfs across 26551 recorded day(s).
- J B MARTINEZ DITCH (7800564) DWR↗: Observed p99 daily rate 17.0 cfs (max 20.0) exceeds total decreed absolute 1.2 cfs across 322 recorded day(s).
- CIMARRON DITCH (7800524) DWR↗: Observed p99 daily rate 15.0 cfs (max 15.0) exceeds total decreed absolute 5.0 cfs across 7748 recorded day(s).
- G S HATCHER DITCH (7800550) DWR↗: Observed p99 daily rate 15.0 cfs (max 16.8) exceeds total decreed absolute 7.5 cfs across 1550 recorded day(s).
- M E AND M DITCH (7800580) DWR↗: Observed p99 daily rate 14.4 cfs (max 21.0) exceeds total decreed absolute 12.0 cfs across 15526 recorded day(s).
- CLAYTON-REED DITCH (7800525) DWR↗: Observed p99 daily rate 13.0 cfs (max 13.1) exceeds total decreed absolute 10.0 cfs across 19001 recorded day(s).
- HOSSACK CREEK DITCH (7800562) DWR↗: Observed p99 daily rate 13.0 cfs (max 24.7) exceeds total decreed absolute 10.0 cfs across 10971 recorded day(s).
- J C R DITCH (7800565) DWR↗: Observed p99 daily rate 12.9 cfs (max 19.0) exceeds total decreed absolute 10.0 cfs across 6994 recorded day(s).
Seniority (top structures by decreed rate)
| Structure | Senior priority date | Rights | Decreed abs (cfs) | Decreed abs (AF) | Conditional? |
|---|---|---|---|---|---|
| PIEDRA RIVER MIN FLOW (7801903) DWR↗ | 1978-03-16 | 1 | 70.0 | 0 | — |
| PIEDRA RIVER MIN FLOW (7801910) DWR↗ | 1979-03-14 | 1 | 70.0 | 0 | — |
| PIEDRA RIVER MIN FLOW (7801902) DWR↗ | 1978-03-16 | 1 | 53.0 | 0 | — |
| PIEDRA RIVER MIN FLOW (7801901) DWR↗ | 1978-03-16 | 1 | 44.0 | 0 | — |
| LINN AND CLARK DITCH (7800578) DWR↗ | 1902-06-14 | 1 | 36.5 | 0 | — |
| PIEDRA RIVER MIN FLOW (7801900) DWR↗ | 1978-03-16 | 1 | 30.0 | 0 | — |
| PIEDRA FALLS DITCH (7800604) DWR↗ | 1934-07-18 | 2 | 26.0 | 0 | yes |
| LITTLE PAGOSA CREEK DIVR (7800659) DWR↗ | 1939-12-31 | 1 | 26.0 | 0 | — |
| BARNES-MEUSER AND SHAW D (7800507) DWR↗ | 1903-12-31 | 3 | 22.5 | 0 | — |
| BUCKSKIN-NAILOR DITCH (7800513) DWR↗ | 1900-03-20 | 7 | 21.9 | 0 | — |
| PERKINS DITCH - STOLLSTEIMER CREEK (7800600) DWR↗ | 1963-07-28 | 1 | 20.0 | 0 | — |
| ABRAHAM DAVIS DITCH (7800501) DWR↗ | 1900-04-01 | 4 | 18.0 | 0 | — |
| WEMINUCHE CR MIN FLOW (7801909) DWR↗ | 1978-03-16 | 1 | 18.0 | 0 | — |
| FARROW AND PETERSON D (7800545) DWR↗ | 1879-04-10 | 6 | 16.6 | 0 | — |
| F S MOCKLER IRR DITCH (7800544) DWR↗ | 1901-10-01 | 1 | 15.0 | 0 | — |
No inventory or legal-document changes detected since the daily watch began.
Water-court filings this month (division-wide)
4 applications in the 2026-07 resume for this basin's division — new rights, changes, augmentation plans — from the water clerk's statutory monthly notice (C.R.S. 37-92-302), the earliest public signal of a new claim. Filings are division-wide, not district-filtered: check the county column. Full resume PDF at the Judicial Branch →
Anyone affected may file a statement of opposition until 2026-09-30 (30 days left). C.R.S. 37-92-302(3): due by the last day of the second month following the filing month — computed, not legal advice; confirm with the water clerk.
All 4 filings, with excerpts
| Case | What it asks | County | Excerpt |
|---|---|---|---|
2026CW3007
3001335 |
change of water right | LA PLATA | 2026CW3007 La Plata County, AMENDED APPLICATION FOR CHANGE OF WATER RIGHT AND NEW WATER RIGHTS. 1. Name and address of Applicants : Gilleland Enterprises, LLC and C&J Gravel Products, Inc. (“Applicants”)c/o John Gilleland 27661 Highway 160 Durango, CO 81301 jo… |
2026CW3016
|
reasonable diligence | LA PLATA | 2026CW3016 La Plata County, Application for Finding of Reasonable Diligence in the Florida River Watershed; Prior case no. 18CW3047: Applicant: The Bingel-Davis Gratitude Trust, u/a dated April 17, 2025, c/o Kimberly C. Perdue, Southwest Water and Property Law… |
2026CW3017
|
— | LA PLATA | 2026CW3017 La Plata County, (20CW3008, 13CW3027, 05CW90)… |
2026CW4
|
— | ARCHULETA | 2026CW4 Archuleta County, Jess E. Ketchum, 320 Stevens Lake Road, Pagosa Springs, CO 81147: Watson Reservoir (Reservoir Pump); Located in the SW 1/4 SE 1/4 of Section 5, T35N, R2W, NMPM, the axis intersects the East abutment at a point approximately 875 ft. No… |
Active substitute water supply plans in this district
Temporary State Engineer approvals to divert out of priority (37-92-308 / 37-90-137). A structure operating under one behaves differently under a call than its decreed rights alone suggest — the priority tables above don't know about these; this list does. Source: DWR’s active-SWSP register, refreshed nightly.
| Plan | Type | Status | Expires | Structure | Documents |
|---|---|---|---|---|---|
| KEYAH GRANDE RANCH - BARB'S WELL | 37-92-308(4) PLAN PENDING COURT APPLICATION | Decreed | 2025-10-31 | — | plan file |
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
DWR administration numbers encode appropriation and adjudication dates; lower is more senior.