← Basin groundwater

BUCKLEY SFB

Monitored well · 157840 · Division 1 · Water District 2

Its well permit here · Well permit at DWR ↗

Source DWR administrative record · verify at DWR well record ↗ Source DWR administrative record · verify at DWR permit record ↗

Unclassified

No aquifer or designated-basin assignment — administrative world unknown, kept out of recharge math.

Water-level record

No water-level measurements are cached for this well. It is in the well inventory — permit, construction and aquifer below — but nobody has logged a level we hold.

Geophysical log

DWR holds a geophysical log for this well, run 2026-01-23 (gamma, resistivity, spontaneous_potential). DWR's log page.

Formation picks (DWR)

AquiferTop ftBase ftNet sand ft
UPPER ARAPAHOE840 1000
LOWER ARAPAHOE1135 1426
DENVER 748

Net sand is DWR's own reading of the log (its gLogThickness), not the gross interval.

Net sand per aquifer, from the gamma curve

Computed here from DWR's own digital log (LAS): linear gamma index, clean/shale lines at p10/p90 of the gamma over the interval, sand where Vsh < 0.4, beds under 1.0 ft merged. DWR’s own pick is beside it, never averaged with it.

AquiferInterval ftNet sand ftNet / grossDWR net sand ftDifference ft
UPPER ARAPAHOE840–1000 46 0.29
LOWER ARAPAHOE1135–1426 98 0.34

A gamma cutoff is a convention, not a measurement. Against DWR’s own picks on 50 wells this one correlates at r 0.86 with a median error near 30% and no bias (how it was scored).

Curves digitized from the scan

Hydrohistorian traced the scanned log automatically. 3 curves passed the confidence gate; 78 did not and are listed with the reason. Screening data: the scan stays the record.

CurveInterval ftCoverageVerdict Curves like this one scored
BOREID (in) -4–169 4% not used: dashed curve on a Phoenix/Pioneer print: not traceable (benchmark median r 0.38 for the shallow resistivity, 0.00 before the dash/dot split); coverage 5%; ambiguous rows 22%; curve name not recognized: 'BOREID'
Conductivity (mmho/m) -4–169 6% not used: dashed curve on a Phoenix/Pioneer print: not traceable (benchmark median r 0.38 for the shallow resistivity, 0.00 before the dash/dot split); coverage 7%; ambiguous rows 30%
DCAL (in) -4–169 11% not used: dashed curve on a Phoenix/Pioneer print: not traceable (benchmark median r 0.38 for the shallow resistivity, 0.00 before the dash/dot split); coverage 12%; ambiguous rows 8%; curve name not recognized: 'DCAL'
Deep Resistivity (Ohm-m) -4–169 4% not used: dashed curve on a Phoenix/Pioneer print: not traceable (benchmark median r 0.38 for the shallow resistivity, 0.00 before the dash/dot split); coverage 5%; ambiguous rows 42%
Gamma Ray (GAPI) -4–169 98% not used: ambiguous rows 64%
Line Tension (Ib) -4–169 26% not used: dashed curve on a Phoenix/Pioneer print: not traceable (benchmark median r 0.38 for the shallow resistivity, 0.00 before the dash/dot split); coverage 26%; ambiguous rows 7%; curve name not recognized: 'Line Tension'
Shallow Resistivity (Ohm-m) -4–169 96% not used: solid curve on a Phoenix/Pioneer print: only the gamma is verified (its resistivity scales are log/backup scales the parser does not read, benchmark r < 0.5); ambiguous rows 96%; curve class not verified by the benchmark: Shallow Resistivity traced as solid
Spontaneous Potential (mV) -4–169 38% not used: dashed curve on a Phoenix/Pioneer print: not traceable (benchmark median r 0.38 for the shallow resistivity, 0.00 before the dash/dot split); coverage 39%; ambiguous rows 8%; SP: the printed scale is a span with an unknown offset, and the benchmark could not verify the shape (median r 0.28 after offset removal)
BOREID (in) 200–719 3% not used: dashed curve on a Phoenix/Pioneer print: not traceable (benchmark median r 0.38 for the shallow resistivity, 0.00 before the dash/dot split); coverage 3%; ambiguous rows 16%; curve name not recognized: 'BOREID'
Conductivity (mmho/m) 200–719 28% not used: dashed curve on a Phoenix/Pioneer print: not traceable (benchmark median r 0.38 for the shallow resistivity, 0.00 before the dash/dot split); coverage 29%; ambiguous rows 21%
DCAL (in) 200–719 9% not used: dashed curve on a Phoenix/Pioneer print: not traceable (benchmark median r 0.38 for the shallow resistivity, 0.00 before the dash/dot split); coverage 9%; ambiguous rows 10%; curve name not recognized: 'DCAL'
Deep Resistivity (Ohm-m) 200–719 19% not used: dashed curve on a Phoenix/Pioneer print: not traceable (benchmark median r 0.38 for the shallow resistivity, 0.00 before the dash/dot split); coverage 20%; ambiguous rows 17%
Gamma Ray (GAPI) 200–719 99% not used: ambiguous rows 62%
Line Tension (Ib) 200–719 45% not used: dashed curve on a Phoenix/Pioneer print: not traceable (benchmark median r 0.38 for the shallow resistivity, 0.00 before the dash/dot split); ambiguous rows 15%; curve name not recognized: 'Line Tension'
Shallow Resistivity (Ohm-m) 200–719 99% not used: solid curve on a Phoenix/Pioneer print: only the gamma is verified (its resistivity scales are log/backup scales the parser does not read, benchmark r < 0.5); ambiguous rows 100%; curve class not verified by the benchmark: Shallow Resistivity traced as solid
Spontaneous Potential (mV) 200–719 38% not used: dashed curve on a Phoenix/Pioneer print: not traceable (benchmark median r 0.38 for the shallow resistivity, 0.00 before the dash/dot split); coverage 38%; ambiguous rows 8%; SP: the printed scale is a span with an unknown offset, and the benchmark could not verify the shape (median r 0.28 after offset removal)
BOREID (in) 750–1269 2% not used: dashed curve on a Phoenix/Pioneer print: not traceable (benchmark median r 0.38 for the shallow resistivity, 0.00 before the dash/dot split); coverage 3%; ambiguous rows 17%; curve name not recognized: 'BOREID'
Conductivity (mmho/m) 750–1269 27% not used: dashed curve on a Phoenix/Pioneer print: not traceable (benchmark median r 0.38 for the shallow resistivity, 0.00 before the dash/dot split); coverage 28%; ambiguous rows 28%
DCAL (in) 750–1269 9% not used: dashed curve on a Phoenix/Pioneer print: not traceable (benchmark median r 0.38 for the shallow resistivity, 0.00 before the dash/dot split); coverage 10%; ambiguous rows 10%; curve name not recognized: 'DCAL'
Deep Resistivity (Ohm-m) 750–1269 20% not used: dashed curve on a Phoenix/Pioneer print: not traceable (benchmark median r 0.38 for the shallow resistivity, 0.00 before the dash/dot split); coverage 21%; ambiguous rows 26%
Gamma Ray (GAPI) 750–1269 99% not used: ambiguous rows 58%
Line Tension (Ib) 750–1269 46% not used: dashed curve on a Phoenix/Pioneer print: not traceable (benchmark median r 0.38 for the shallow resistivity, 0.00 before the dash/dot split); ambiguous rows 19%; curve name not recognized: 'Line Tension'
Shallow Resistivity (Ohm-m) 750–1269 99% not used: solid curve on a Phoenix/Pioneer print: only the gamma is verified (its resistivity scales are log/backup scales the parser does not read, benchmark r < 0.5); ambiguous rows 99%; curve class not verified by the benchmark: Shallow Resistivity traced as solid
Spontaneous Potential (mV) 750–1269 43% not used: dashed curve on a Phoenix/Pioneer print: not traceable (benchmark median r 0.38 for the shallow resistivity, 0.00 before the dash/dot split); ambiguous rows 7%; SP: the printed scale is a span with an unknown offset, and the benchmark could not verify the shape (median r 0.28 after offset removal)
BOREID (in) 98–269 4% not used: dashed curve on a Phoenix/Pioneer print: not traceable (benchmark median r 0.38 for the shallow resistivity, 0.00 before the dash/dot split); coverage 5%; ambiguous rows 10%; curve name not recognized: 'BOREID'
Conductivity (mmho/m) 98–269 47% not used: dashed curve on a Phoenix/Pioneer print: not traceable (benchmark median r 0.38 for the shallow resistivity, 0.00 before the dash/dot split); ambiguous rows 49%
DCAL (in) 98–269 21% not used: dashed curve on a Phoenix/Pioneer print: not traceable (benchmark median r 0.38 for the shallow resistivity, 0.00 before the dash/dot split); coverage 22%; curve name not recognized: 'DCAL'
Deep Resistivity (Ohm-m) 98–269 35% not used: dashed curve on a Phoenix/Pioneer print: not traceable (benchmark median r 0.38 for the shallow resistivity, 0.00 before the dash/dot split); coverage 36%; ambiguous rows 42%
Gamma Ray (GAPI) 98–269 100% not used: ambiguous rows 54%
Line Tension (Ib) 98–269 66% not used: dashed curve on a Phoenix/Pioneer print: not traceable (benchmark median r 0.38 for the shallow resistivity, 0.00 before the dash/dot split); ambiguous rows 27%; curve name not recognized: 'Line Tension'
Shallow Resistivity (Ohm-m) 98–269 100% not used: solid curve on a Phoenix/Pioneer print: only the gamma is verified (its resistivity scales are log/backup scales the parser does not read, benchmark r < 0.5); ambiguous rows 98%; curve class not verified by the benchmark: Shallow Resistivity traced as solid
Spontaneous Potential (mV) 98–269 68% not used: dashed curve on a Phoenix/Pioneer print: not traceable (benchmark median r 0.38 for the shallow resistivity, 0.00 before the dash/dot split); ambiguous rows 9%; SP: the printed scale is a span with an unknown offset, and the benchmark could not verify the shape (median r 0.28 after offset removal)
BOREID (in) 298–489 7% not used: dashed curve on a Phoenix/Pioneer print: not traceable (benchmark median r 0.38 for the shallow resistivity, 0.00 before the dash/dot split); coverage 8%; ambiguous rows 8%; curve name not recognized: 'BOREID'
Conductivity (mmho/m) 298–489 63% not used: dashed curve on a Phoenix/Pioneer print: not traceable (benchmark median r 0.38 for the shallow resistivity, 0.00 before the dash/dot split); ambiguous rows 30%
DCAL (in) 298–489 21% not used: dashed curve on a Phoenix/Pioneer print: not traceable (benchmark median r 0.38 for the shallow resistivity, 0.00 before the dash/dot split); coverage 21%; curve name not recognized: 'DCAL'
Deep Resistivity (Ohm-m) 298–489 48% not used: dashed curve on a Phoenix/Pioneer print: not traceable (benchmark median r 0.38 for the shallow resistivity, 0.00 before the dash/dot split); ambiguous rows 28%
Gamma Ray (GAPI) 298–489 100% not used: ambiguous rows 56%
Line Tension (Ib) 298–489 78% not used: dashed curve on a Phoenix/Pioneer print: not traceable (benchmark median r 0.38 for the shallow resistivity, 0.00 before the dash/dot split); ambiguous rows 18%; curve name not recognized: 'Line Tension'
Shallow Resistivity (Ohm-m) 298–489 100% not used: solid curve on a Phoenix/Pioneer print: only the gamma is verified (its resistivity scales are log/backup scales the parser does not read, benchmark r < 0.5); ambiguous rows 98%; curve class not verified by the benchmark: Shallow Resistivity traced as solid
Spontaneous Potential (mV) 298–489 62% not used: dashed curve on a Phoenix/Pioneer print: not traceable (benchmark median r 0.38 for the shallow resistivity, 0.00 before the dash/dot split); ambiguous rows 11%; SP: the printed scale is a span with an unknown offset, and the benchmark could not verify the shape (median r 0.28 after offset removal)
BOREID (in) 498–710 4% not used: dashed curve on a Phoenix/Pioneer print: not traceable (benchmark median r 0.38 for the shallow resistivity, 0.00 before the dash/dot split); coverage 4%; ambiguous rows 18%; curve name not recognized: 'BOREID'
Conductivity (mmho/m) 498–710 51% not used: dashed curve on a Phoenix/Pioneer print: not traceable (benchmark median r 0.38 for the shallow resistivity, 0.00 before the dash/dot split); ambiguous rows 37%
DCAL (in) 498–710 22% not used: dashed curve on a Phoenix/Pioneer print: not traceable (benchmark median r 0.38 for the shallow resistivity, 0.00 before the dash/dot split); coverage 22%; ambiguous rows 8%; curve name not recognized: 'DCAL'
Deep Resistivity (Ohm-m) 498–710 37% not used: dashed curve on a Phoenix/Pioneer print: not traceable (benchmark median r 0.38 for the shallow resistivity, 0.00 before the dash/dot split); coverage 37%; ambiguous rows 38%
Gamma Ray (GAPI) 498–710 100% pass r 0.99 median, error 0.6% of scale, 7% below r 0.8 (n 411) LAS
Line Tension (Ib) 498–710 76% not used: dashed curve on a Phoenix/Pioneer print: not traceable (benchmark median r 0.38 for the shallow resistivity, 0.00 before the dash/dot split); ambiguous rows 22%; curve name not recognized: 'Line Tension'
Shallow Resistivity (Ohm-m) 498–710 100% not used: solid curve on a Phoenix/Pioneer print: only the gamma is verified (its resistivity scales are log/backup scales the parser does not read, benchmark r < 0.5); ambiguous rows 99%; curve class not verified by the benchmark: Shallow Resistivity traced as solid
Spontaneous Potential (mV) 498–710 68% not used: dashed curve on a Phoenix/Pioneer print: not traceable (benchmark median r 0.38 for the shallow resistivity, 0.00 before the dash/dot split); ambiguous rows 8%; SP: the printed scale is a span with an unknown offset, and the benchmark could not verify the shape (median r 0.28 after offset removal)
BOREID (in) 748–930 1% not used: dashed curve on a Phoenix/Pioneer print: not traceable (benchmark median r 0.38 for the shallow resistivity, 0.00 before the dash/dot split); coverage 2%; ambiguous rows 22%; curve name not recognized: 'BOREID'
Conductivity (mmho/m) 748–930 55% not used: dashed curve on a Phoenix/Pioneer print: not traceable (benchmark median r 0.38 for the shallow resistivity, 0.00 before the dash/dot split); ambiguous rows 46%
DCAL (in) 748–930 24% not used: dashed curve on a Phoenix/Pioneer print: not traceable (benchmark median r 0.38 for the shallow resistivity, 0.00 before the dash/dot split); coverage 24%; curve name not recognized: 'DCAL'
Deep Resistivity (Ohm-m) 748–930 43% not used: dashed curve on a Phoenix/Pioneer print: not traceable (benchmark median r 0.38 for the shallow resistivity, 0.00 before the dash/dot split); ambiguous rows 42%
Gamma Ray (GAPI) 748–930 100% pass r 0.99 median, error 0.6% of scale, 7% below r 0.8 (n 411) LAS
Line Tension (Ib) 748–930 74% not used: dashed curve on a Phoenix/Pioneer print: not traceable (benchmark median r 0.38 for the shallow resistivity, 0.00 before the dash/dot split); ambiguous rows 25%; curve name not recognized: 'Line Tension'
Shallow Resistivity (Ohm-m) 748–930 100% not used: solid curve on a Phoenix/Pioneer print: only the gamma is verified (its resistivity scales are log/backup scales the parser does not read, benchmark r < 0.5); ambiguous rows 98%; curve class not verified by the benchmark: Shallow Resistivity traced as solid
Spontaneous Potential (mV) 748–930 67% not used: dashed curve on a Phoenix/Pioneer print: not traceable (benchmark median r 0.38 for the shallow resistivity, 0.00 before the dash/dot split); ambiguous rows 11%; SP: the printed scale is a span with an unknown offset, and the benchmark could not verify the shape (median r 0.28 after offset removal)
BOREID (in) 948–1150 7% not used: dashed curve on a Phoenix/Pioneer print: not traceable (benchmark median r 0.38 for the shallow resistivity, 0.00 before the dash/dot split); coverage 7%; ambiguous rows 7%; curve name not recognized: 'BOREID'
Conductivity (mmho/m) 948–1150 52% not used: dashed curve on a Phoenix/Pioneer print: not traceable (benchmark median r 0.38 for the shallow resistivity, 0.00 before the dash/dot split); ambiguous rows 33%
DCAL (in) 948–1150 23% not used: dashed curve on a Phoenix/Pioneer print: not traceable (benchmark median r 0.38 for the shallow resistivity, 0.00 before the dash/dot split); coverage 23%; curve name not recognized: 'DCAL'
Deep Resistivity (Ohm-m) 948–1150 38% not used: dashed curve on a Phoenix/Pioneer print: not traceable (benchmark median r 0.38 for the shallow resistivity, 0.00 before the dash/dot split); coverage 38%; ambiguous rows 25%
Gamma Ray (GAPI) 948–1150 100% not used: ambiguous rows 57%
Line Tension (Ib) 948–1150 76% not used: dashed curve on a Phoenix/Pioneer print: not traceable (benchmark median r 0.38 for the shallow resistivity, 0.00 before the dash/dot split); ambiguous rows 23%; curve name not recognized: 'Line Tension'
Shallow Resistivity (Ohm-m) 948–1150 100% not used: solid curve on a Phoenix/Pioneer print: only the gamma is verified (its resistivity scales are log/backup scales the parser does not read, benchmark r < 0.5); ambiguous rows 100%; curve class not verified by the benchmark: Shallow Resistivity traced as solid
Spontaneous Potential (mV) 948–1150 67% not used: dashed curve on a Phoenix/Pioneer print: not traceable (benchmark median r 0.38 for the shallow resistivity, 0.00 before the dash/dot split); ambiguous rows 14%; SP: the printed scale is a span with an unknown offset, and the benchmark could not verify the shape (median r 0.28 after offset removal)
BOREID (in) 1198–1370 3% not used: dashed curve on a Phoenix/Pioneer print: not traceable (benchmark median r 0.38 for the shallow resistivity, 0.00 before the dash/dot split); coverage 3%; ambiguous rows 20%; curve name not recognized: 'BOREID'
Conductivity (mmho/m) 1198–1370 56% not used: dashed curve on a Phoenix/Pioneer print: not traceable (benchmark median r 0.38 for the shallow resistivity, 0.00 before the dash/dot split); ambiguous rows 26%
DCAL (in) 1198–1370 19% not used: dashed curve on a Phoenix/Pioneer print: not traceable (benchmark median r 0.38 for the shallow resistivity, 0.00 before the dash/dot split); coverage 20%; curve name not recognized: 'DCAL'
Deep Resistivity (Ohm-m) 1198–1370 41% not used: dashed curve on a Phoenix/Pioneer print: not traceable (benchmark median r 0.38 for the shallow resistivity, 0.00 before the dash/dot split); ambiguous rows 20%
Gamma Ray (GAPI) 1198–1370 100% pass r 0.99 median, error 0.6% of scale, 7% below r 0.8 (n 411) LAS
Line Tension (Ib) 1198–1370 73% not used: dashed curve on a Phoenix/Pioneer print: not traceable (benchmark median r 0.38 for the shallow resistivity, 0.00 before the dash/dot split); ambiguous rows 22%; curve name not recognized: 'Line Tension'
Shallow Resistivity (Ohm-m) 1198–1370 100% not used: solid curve on a Phoenix/Pioneer print: only the gamma is verified (its resistivity scales are log/backup scales the parser does not read, benchmark r < 0.5); ambiguous rows 96%; curve class not verified by the benchmark: Shallow Resistivity traced as solid
Spontaneous Potential (mV) 1198–1370 62% not used: dashed curve on a Phoenix/Pioneer print: not traceable (benchmark median r 0.38 for the shallow resistivity, 0.00 before the dash/dot split); ambiguous rows 10%; SP: the printed scale is a span with an unknown offset, and the benchmark could not verify the shape (median r 0.28 after offset removal)
BOREID (in) -4–5938 10% not used: dashed curve on a Phoenix/Pioneer print: not traceable (benchmark median r 0.38 for the shallow resistivity, 0.00 before the dash/dot split); coverage 10%; ambiguous rows 50%; curve name not recognized: 'BOREID'
CASEOD -4–5938 48% not used: ambiguous rows 22%; curve name not recognized: 'CASEOD'
Conductivity (mmho/m) -4–5938 10% not used: dashed curve on a Phoenix/Pioneer print: not traceable (benchmark median r 0.38 for the shallow resistivity, 0.00 before the dash/dot split); coverage 11%; ambiguous rows 32%; scale OCR confidence 0.76
DCAL (in) -4–5938 6% not used: dashed curve on a Phoenix/Pioneer print: not traceable (benchmark median r 0.38 for the shallow resistivity, 0.00 before the dash/dot split); coverage 6%; ambiguous rows 58%; curve name not recognized: 'DCAL'
LineTension (Ib) -4–5938 5% not used: dashed curve on a Phoenix/Pioneer print: not traceable (benchmark median r 0.38 for the shallow resistivity, 0.00 before the dash/dot split); coverage 6%; ambiguous rows 52%; scale OCR confidence 0.79; curve name not recognized: 'LineTension'
MATRXDEN (No) -4–5938 73% not used: ambiguous rows 21%; curve name not recognized: 'MATRXDEN'
Shallow Resistivity (Ohm-m) -4–5938 86% not used: solid curve on a Phoenix/Pioneer print: only the gamma is verified (its resistivity scales are log/backup scales the parser does not read, benchmark r < 0.5); ambiguous rows 98%; curve class not verified by the benchmark: Shallow Resistivity traced as solid
Spontaneous Potential (mV) -4–5938 10% not used: dashed curve on a Phoenix/Pioneer print: not traceable (benchmark median r 0.38 for the shallow resistivity, 0.00 before the dash/dot split); coverage 10%; ambiguous rows 31%; SP: the printed scale is a span with an unknown offset, and the benchmark could not verify the shape (median r 0.28 after offset removal)
g/cc -4–5938 26% not used: coverage 27%; ambiguous rows 27%; curve name not recognized: 'g/cc'

"Curves like this one" is the benchmark row for this curve's class: curves of the same name traced the same way, scored against DWR's own digital log of the same run. r is correlation (the print's own smoothing allowed for); error is mean absolute error as a share of the track's printed range; "below r 0.8" is the share of passing curves in the class that still disagreed with DWR's log, which this curve's own numbers cannot rule out.

The LAS files and every verdict are in the statewide groundwater release (/data, table gw_digitized); the MCP server's gw_digitized_curves and gw_net_sand work from them. How well the tracer does was measured against DWR's own digital logs.

The well itself

Total depth1440.0 ft
Ground elevation5539.0 ft
Permit90128
Location39.72000, -104.77000
What this page is not

Monitoring records are irregular: measurements cluster where somebody chose to look, so a trend describes this well's record, not the aquifer as a whole. Levels are DWR's published measurements, unedited. A trend here is not a prediction, and it is not a determination about anyone's water right.