Hydrohistorian
TOWN OF MONUMENT WELL 13
Monitored well · 156401 · Division 2 · Water District 10
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 2023-03-06 (gamma, resistivity, spontaneous_potential). DWR's log page.
Formation picks (DWR)
| Aquifer | Top ft | Base ft | Net sand ft |
|---|---|---|---|
| DENVER | 635 | 1186 | |
| DAWSON | 605 |
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.
| Aquifer | Interval ft | Net sand ft | Net / gross | DWR net sand ft | Difference ft |
|---|---|---|---|---|---|
| DENVER | 635–1186 | 209 | 0.38 |
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. 4 curves passed the confidence gate; 58 did not and are listed with the reason. Screening data: the scan stays the record.
| Curve | Interval ft | Coverage | Verdict | Curves like this one scored | |
|---|---|---|---|---|---|
| CORRECTION (g/cc) | 995–1183 | 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 78%; curve name not recognized: 'CORRECTION' | ||
| DCAL (in) | 995–1183 | 98% | 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 44%; curve name not recognized: 'DCAL' | ||
| DPOR (pu) | 995–1183 | 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 85%; curve name not recognized: 'DPOR' | ||
| LINE TENSION (Ib) | 995–1183 | 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); curve name not recognized: 'LINE TENSION' | ||
| CNPOR (pu) | -3–169 | 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 91%; curve name not recognized: 'CNPOR' | ||
| CORRECTION (g/cc) | -3–169 | 98% | 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 63%; curve name not recognized: 'CORRECTION' | ||
| DCAL (in) | -3–169 | 18% | 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 18%; curve name not recognized: 'DCAL' | ||
| DPOR (pu) | -3–169 | 14% | 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 14%; ambiguous rows 18%; curve name not recognized: 'DPOR' | ||
| Gamma Ray (GAPI) | -3–169 | 98% | pass | r 0.99 median, error 0.6% of scale, 7% below r 0.8 (n 411) | LAS |
| LINETENSION (Ib) | -3–169 | 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 27%; ambiguous rows 18%; curve name not recognized: 'LINETENSION' | ||
| CNPOR (pu) | 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 99%; curve name not recognized: 'CNPOR' | ||
| CORRECTION (g/cc) | 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 93%; curve name not recognized: 'CORRECTION' | ||
| DCAL (in) | 200–719 | 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%; curve name not recognized: 'DCAL' | ||
| DPOR (pu) | 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 26%; curve name not recognized: 'DPOR' | ||
| Gamma Ray (GAPI) | 200–719 | 99% | not used: ambiguous rows 57% | ||
| LINETENSION (Ib) | 200–719 | 33% | 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 34%; ambiguous rows 20%; curve name not recognized: 'LINETENSION' | ||
| CNPOR (pu) | 750–1268 | 90% | 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 name not recognized: 'CNPOR' | ||
| CORRECTION (g/cc) | 750–1268 | 92% | 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 90%; curve name not recognized: 'CORRECTION' | ||
| DCAL (in) | 750–1268 | 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 13%; curve name not recognized: 'DCAL' | ||
| DPOR (pu) | 750–1268 | 17% | 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 18%; ambiguous rows 28%; curve name not recognized: 'DPOR' | ||
| Gamma Ray (GAPI) | 750–1268 | 85% | not used: ambiguous rows 72% | ||
| LINETENSION (Ib) | 750–1268 | 30% | 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 30%; ambiguous rows 21%; curve name not recognized: 'LINETENSION' | ||
| CNPOR (pu) | 198–378 | 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 78%; curve name not recognized: 'CNPOR' | ||
| CORRECTION (g/cc) | 198–378 | 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 58%; curve name not recognized: 'CORRECTION' | ||
| DCAL (in) | 198–378 | 33% | 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 33%; curve name not recognized: 'DCAL' | ||
| DPOR (pu) | 198–378 | 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 20%; curve name not recognized: 'DPOR' | ||
| Gamma Ray (GAPI) | 198–378 | 100% | pass | r 0.99 median, error 0.6% of scale, 7% below r 0.8 (n 411) | LAS |
| LINETENSION (Ib) | 198–378 | 77% | 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: 'LINETENSION' | ||
| CNPOR (pu) | 398–597 | 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 86%; curve name not recognized: 'CNPOR' | ||
| CORRECTION (g/cc) | 398–597 | 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 71%; curve name not recognized: 'CORRECTION' | ||
| DCAL (in) | 398–597 | 25% | 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%; curve name not recognized: 'DCAL' | ||
| DPOR (pu) | 398–597 | 53% | 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%; curve name not recognized: 'DPOR' | ||
| Gamma Ray (GAPI) | 398–597 | 100% | pass | r 0.99 median, error 0.6% of scale, 7% below r 0.8 (n 411) | LAS |
| LINETENSION (Ib) | 398–597 | 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 17%; curve name not recognized: 'LINETENSION' | ||
| CNPOR (pu) | 648–817 | 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 81%; curve name not recognized: 'CNPOR' | ||
| CORRECTION (g/cc) | 648–817 | 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 35%; curve name not recognized: 'CORRECTION' | ||
| DCAL (in) | 648–817 | 33% | 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 33%; curve name not recognized: 'DCAL' | ||
| DPOR (pu) | 648–817 | 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 25%; curve name not recognized: 'DPOR' | ||
| Gamma Ray (GAPI) | 648–817 | 99% | not used: ambiguous rows 52% | ||
| LINETENSION (Ib) | 648–817 | 65% | 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 21%; curve name not recognized: 'LINETENSION' | ||
| CNPOR (pu) | 848–1037 | 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 82%; curve name not recognized: 'CNPOR' | ||
| CORRECTION (g/cc) | 848–1037 | 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 60%; curve name not recognized: 'CORRECTION' | ||
| DCAL (in) | 848–1037 | 16% | 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 16%; ambiguous rows 6%; curve name not recognized: 'DCAL' | ||
| DPOR (pu) | 848–1037 | 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 28%; curve name not recognized: 'DPOR' | ||
| Gamma Ray (GAPI) | 848–1037 | 100% | not used: ambiguous rows 55% | ||
| LINETENSION (Ib) | 848–1037 | 72% | 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 21%; curve name not recognized: 'LINETENSION' | ||
| CNPOR (pu) | 1048–1248 | 80% | 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 81%; curve name not recognized: 'CNPOR' | ||
| CORRECTION (g/cc) | 1048–1248 | 82% | 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 71%; curve name not recognized: 'CORRECTION' | ||
| DCAL (in) | 1048–1248 | 13% | 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 13%; ambiguous rows 8%; curve name not recognized: 'DCAL' | ||
| DPOR (pu) | 1048–1248 | 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: 'DPOR' | ||
| Gamma Ray (GAPI) | 1048–1248 | 79% | not used: ambiguous rows 65% | ||
| LINETENSION (Ib) | 1048–1248 | 36% | 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 5%; curve name not recognized: 'LINETENSION' | ||
| CORRECTION (g/cc) | 995–1183 | 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 72%; curve name not recognized: 'CORRECTION' | ||
| DCAL (in) | 995–1183 | 98% | 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 40%; curve name not recognized: 'DCAL' | ||
| CNPOR (pu) | -3–169 | 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 91%; curve name not recognized: 'CNPOR' | ||
| CORRECTION (g/cc) | -3–169 | 98% | 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 63%; curve name not recognized: 'CORRECTION' | ||
| DCAL (in) | -3–169 | 18% | 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 18%; curve name not recognized: 'DCAL' | ||
| DPOR (pu) | -3–169 | 14% | 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 14%; ambiguous rows 18%; curve name not recognized: 'DPOR' | ||
| Gamma Ray (GAPI) | -3–169 | 98% | pass | r 0.99 median, error 0.6% of scale, 7% below r 0.8 (n 411) | LAS |
| LINETENSION (Ib) | -3–169 | 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 27%; ambiguous rows 18%; curve name not recognized: 'LINETENSION' | ||
| CORRECTION (g/cc) | 995–1183 | 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 72%; curve name not recognized: 'CORRECTION' | ||
| DCAL (in) | 995–1183 | 98% | 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 40%; curve name not recognized: 'DCAL' |
"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 depth | 1200.0 ft |
|---|---|
| Perforated interval | 748.0–1175.0 ft |
| Ground elevation | 7009.0 ft |
| Permit | 329154 |
| Location | 39.09000, -104.87000 |
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.