Hydrohistorian
CENTENNIAL A-8R
Monitored well · 152961 · Division 1 · Water District 8
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 ↗
Denver Basin bedrock
Confined sandstone aquifer; negligible human-timescale recharge — pumping is one-way storage mining.
Because this aquifer does not recharge on a human timescale, a decline here is storage being removed, not a stream being short. It is kept out of the stream-depletion math for that reason.
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 2019-07-22 (gamma, resistivity, spontaneous_potential). DWR's log page.
Formation picks (DWR)
| Aquifer | Top ft | Base ft | Net sand ft |
|---|---|---|---|
| ARAPAHOE | 785 | 1318 | |
| DENVER | 770 |
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 |
|---|---|---|---|---|---|
| ARAPAHOE | 785–1318 | 187 | 0.35 |
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. 8 curves passed the confidence gate; 116 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 | |
|---|---|---|---|---|---|
| (GAPI) ((GAPI)) | -5–1977 | 27% | not used: coverage 27%; ambiguous rows 8%; curve name not recognized: '(GAPI)' | ||
| DCAL (in) | -5–1977 | 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%; ambiguous rows 38%; curve name not recognized: 'DCAL' | ||
| DCAL (in) | -5–1977 | 12% | 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 53%; curve name not recognized: 'DCAL' | ||
| Deep Resistivity (Ohm-m) | -5–1977 | 12% | 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 59% | ||
| LineTension (Ib) | -5–1977 | 87% | 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%; scale OCR confidence 0.61; curve name not recognized: 'LineTension' | ||
| Shallow Resistivity (Ohm-m) | -5–1977 | 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 32% | ||
| Shallow Resistivity (Ohm-m) | -5–1977 | 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%; ambiguous rows 48% | ||
| Shallow Resistivity (Ohm-m) | -5–1977 | 76% | 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 42%; scale OCR confidence 0.69; curve class not verified by the benchmark: Shallow Resistivity traced as solid | ||
| CORRECTION (g/cc) | -6–6465 | 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 51%; curve name not recognized: 'CORRECTION' | ||
| DCAL (in) | -6–6465 | 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 5%; ambiguous rows 51%; curve name not recognized: 'DCAL' | ||
| DPOR (pu) | -6–6465 | 83% | 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 73%; curve name not recognized: 'DPOR' | ||
| FLUIDDEN | -6–6465 | 66% | not used: ambiguous rows 14%; curve name not recognized: 'FLUIDDEN' | ||
| Gamma Ray (GAPI) | -6–6465 | 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 37% | ||
| LINE TENSION (Ib) | -6–6465 | 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 11%; ambiguous rows 45%; curve name not recognized: 'LINE TENSION' | ||
| SNDERR | -6–6465 | 26% | not used: coverage 27%; ambiguous rows 14%; curve name not recognized: 'SNDERR' | ||
| SNDERRM | -6–6465 | 12% | not used: coverage 13%; ambiguous rows 47%; curve name not recognized: 'SNDERRM' | ||
| SRFTEMP | -6–6465 | 52% | not used: ambiguous rows 28%; curve name not recognized: 'SRFTEMP' | ||
| Conductivity (mmho/m) | -6–229 | 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 9% | ||
| DCAL (in) | -6–229 | 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 25%; curve name not recognized: 'DCAL' | ||
| Deep Resistivity (Ohm-m) | -6–229 | 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%; ambiguous rows 12% | ||
| Line Tension (Ib) | -6–229 | 32% | 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 32%; ambiguous rows 7%; curve name not recognized: 'Line Tension' | ||
| Shallow Resistivity (Ohm-m) | -6–229 | 94% | 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 84%; curve class not verified by the benchmark: Shallow Resistivity traced as solid | ||
| Shallow Resistivity (Ohm-m) | -6–229 | 84% | 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 61%; curve class not verified by the benchmark: Shallow Resistivity traced as solid | ||
| Conductivity (mmho/m) | 250–779 | 15% | 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 9% | ||
| DCAL (in) | 250–779 | 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 47%; curve name not recognized: 'DCAL' | ||
| Deep Resistivity (Ohm-m) | 250–779 | 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 25%; ambiguous rows 10% | ||
| Line Tension (Ib) | 250–779 | 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 10%; curve name not recognized: 'Line Tension' | ||
| Shallow Resistivity (Ohm-m) | 250–779 | 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 class not verified by the benchmark: Shallow Resistivity traced as solid | ||
| Shallow Resistivity (Ohm-m) | 250–779 | 84% | 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 57%; curve class not verified by the benchmark: Shallow Resistivity traced as solid | ||
| Conductivity (mmho/m) | 800–1329 | 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 9% | ||
| DCAL (in) | 800–1329 | 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 46%; curve name not recognized: 'DCAL' | ||
| Deep Resistivity (Ohm-m) | 800–1329 | 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 19%; ambiguous rows 12% | ||
| Line Tension (Ib) | 800–1329 | 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 8%; curve name not recognized: 'Line Tension' | ||
| Shallow Resistivity (Ohm-m) | 800–1329 | 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 class not verified by the benchmark: Shallow Resistivity traced as solid | ||
| Shallow Resistivity (Ohm-m) | 800–1329 | 77% | 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 50%; curve class not verified by the benchmark: Shallow Resistivity traced as solid | ||
| Conductivity (mmho/m) | 100–317 | 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 20% | ||
| DCAL (in) | 100–317 | 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 30%; curve name not recognized: 'DCAL' | ||
| Deep Resistivity (Ohm-m) | 100–317 | 58% | 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% | ||
| Line Tension (Ib) | 100–317 | 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 19%; curve name not recognized: 'Line Tension' | ||
| Shallow Resistivity (Ohm-m) | 100–317 | 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 72%; curve class not verified by the benchmark: Shallow Resistivity traced as solid | ||
| Shallow Resistivity (Ohm-m) | 100–317 | 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 44%; curve class not verified by the benchmark: Shallow Resistivity traced as solid | ||
| Conductivity (mmho/m) | 348–537 | 32% | 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%; ambiguous rows 10% | ||
| DCAL (in) | 348–537 | 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 45%; curve name not recognized: 'DCAL' | ||
| Deep Resistivity (Ohm-m) | 348–537 | 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 21% | ||
| Line Tension (Ib) | 348–537 | 70% | 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) | 348–537 | 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 74%; curve class not verified by the benchmark: Shallow Resistivity traced as solid | ||
| Shallow Resistivity (Ohm-m) | 348–537 | 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 40%; curve class not verified by the benchmark: Shallow Resistivity traced as solid | ||
| Conductivity (mmho/m) | 548–757 | 40% | 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% | ||
| DCAL (in) | 548–757 | 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 28%; curve name not recognized: 'DCAL' | ||
| Deep Resistivity (Ohm-m) | 548–757 | 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 17% | ||
| Line Tension (Ib) | 548–757 | 71% | 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%; curve name not recognized: 'Line Tension' | ||
| Shallow Resistivity (Ohm-m) | 548–757 | 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 class not verified by the benchmark: Shallow Resistivity traced as solid | ||
| Shallow Resistivity (Ohm-m) | 548–757 | 75% | 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 34%; curve class not verified by the benchmark: Shallow Resistivity traced as solid | ||
| Conductivity (mmho/m) | 798–977 | 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 8% | ||
| DCAL (in) | 798–977 | 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 41%; curve name not recognized: 'DCAL' | ||
| Deep Resistivity (Ohm-m) | 798–977 | 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 14% | ||
| Line Tension (Ib) | 798–977 | 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 9%; curve name not recognized: 'Line Tension' | ||
| Shallow Resistivity (Ohm-m) | 798–977 | 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 87%; curve class not verified by the benchmark: Shallow Resistivity traced as solid | ||
| Shallow Resistivity (Ohm-m) | 798–977 | 74% | 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 48%; curve class not verified by the benchmark: Shallow Resistivity traced as solid | ||
| Conductivity (mmho/m) | 998–1198 | 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 28%; ambiguous rows 5% | ||
| DCAL (in) | 998–1198 | 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 42%; curve name not recognized: 'DCAL' | ||
| Deep Resistivity (Ohm-m) | 998–1198 | 39% | 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 9% | ||
| Line Tension (Ib) | 998–1198 | 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 10%; curve name not recognized: 'Line Tension' | ||
| Shallow Resistivity (Ohm-m) | 998–1198 | 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 67%; curve class not verified by the benchmark: Shallow Resistivity traced as solid | ||
| Shallow Resistivity (Ohm-m) | 998–1198 | 74% | 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 25%; curve class not verified by the benchmark: Shallow Resistivity traced as solid | ||
| Conductivity (mmho/m) | 1200–1400 | 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 24% | ||
| DCAL (in) | 1200–1400 | 73% | 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' | ||
| Deep Resistivity (Ohm-m) | 1200–1400 | 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 15%; ambiguous rows 18% | ||
| Line Tension (Ib) | 1200–1400 | 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 8%; curve name not recognized: 'Line Tension' | ||
| Shallow Resistivity (Ohm-m) | 1200–1400 | 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 60%; curve class not verified by the benchmark: Shallow Resistivity traced as solid | ||
| Shallow Resistivity (Ohm-m) | 1200–1400 | 79% | 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 class not verified by the benchmark: Shallow Resistivity traced as solid | ||
| Conductivity (mmho/m) | 1145–1311 | 29% | 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 8% | ||
| DCAL (in) | 1145–1311 | 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 24%; curve name not recognized: 'DCAL' | ||
| Shallow Resistivity (Ohm-m) | 1145–1311 | 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 65%; curve class not verified by the benchmark: Shallow Resistivity traced as solid | ||
| Shallow Resistivity (Ohm-m) | 1145–1311 | 85% | 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 23%; curve class not verified by the benchmark: Shallow Resistivity traced as solid | ||
| CNLS (pu) | -6–259 | 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: 'CNLS' | ||
| CORRECTION (g/cc) | -6–259 | 97% | 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 42%; curve name not recognized: 'CORRECTION' | ||
| DCAL (in) | -6–259 | 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 14%; curve name not recognized: 'DCAL' | ||
| DPOR (pu) | -6–259 | 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 4%; ambiguous rows 21%; curve name not recognized: 'DPOR' | ||
| Gamma Ray (GAPI) | -6–259 | 99% | pass | r 0.99 median, error 0.6% of scale, 7% below r 0.8 (n 411) | LAS |
| LINE TENSION (Ib) | -6–259 | 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: 'LINE TENSION' | ||
| CNLS (pu) | 300–809 | 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 94%; curve name not recognized: 'CNLS' | ||
| CORRECTION (g/cc) | 300–809 | 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 68%; curve name not recognized: 'CORRECTION' | ||
| DCAL (in) | 300–809 | 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%; curve name not recognized: 'DCAL' | ||
| DPOR (pu) | 300–809 | 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 17%; ambiguous rows 26%; curve name not recognized: 'DPOR' | ||
| Gamma Ray (GAPI) | 300–809 | 99% | pass | r 0.99 median, error 0.6% of scale, 7% below r 0.8 (n 411) | LAS |
| LINE TENSION (Ib) | 300–809 | 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 36%; ambiguous rows 17%; curve name not recognized: 'LINE TENSION' | ||
| CNLS (pu) | 850–1359 | 97% | 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 92%; curve name not recognized: 'CNLS' | ||
| CORRECTION (g/cc) | 850–1359 | 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 66%; curve name not recognized: 'CORRECTION' | ||
| DCAL (in) | 850–1359 | 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' | ||
| DPOR (pu) | 850–1359 | 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 19%; ambiguous rows 24%; curve name not recognized: 'DPOR' | ||
| Gamma Ray (GAPI) | 850–1359 | 94% | pass | r 0.99 median, error 0.6% of scale, 7% below r 0.8 (n 411) | LAS |
| LINE TENSION (Ib) | 850–1359 | 42% | 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' | ||
| CNLS (pu) | 148–346 | 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 73%; curve name not recognized: 'CNLS' | ||
| CORRECTION (g/cc) | 148–346 | 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 30%; curve name not recognized: 'CORRECTION' | ||
| DCAL (in) | 148–346 | 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 19%; curve name not recognized: 'DCAL' | ||
| DPOR (pu) | 148–346 | 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 34%; curve name not recognized: 'DPOR' | ||
| Gamma Ray (GAPI) | 148–346 | 100% | pass | r 0.99 median, error 0.6% of scale, 7% below r 0.8 (n 411) | LAS |
| LINE TENSION (Ib) | 148–346 | 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 25%; curve name not recognized: 'LINE TENSION' | ||
| CNLS (pu) | 348–565 | 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 75%; curve name not recognized: 'CNLS' | ||
| CORRECTION (g/cc) | 348–565 | 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 37%; curve name not recognized: 'CORRECTION' | ||
| DCAL (in) | 348–565 | 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%; curve name not recognized: 'DCAL' | ||
| DPOR (pu) | 348–565 | 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 33%; curve name not recognized: 'DPOR' | ||
| Gamma Ray (GAPI) | 348–565 | 100% | pass | r 0.99 median, error 0.6% of scale, 7% below r 0.8 (n 411) | LAS |
| LINE TENSION (Ib) | 348–565 | 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 23%; curve name not recognized: 'LINE TENSION' | ||
| CNLS (pu) | 598–785 | 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 70%; curve name not recognized: 'CNLS' | ||
| CORRECTION (g/cc) | 598–785 | 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 47%; curve name not recognized: 'CORRECTION' | ||
| DCAL (in) | 598–785 | 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' | ||
| DPOR (pu) | 598–785 | 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 27%; curve name not recognized: 'DPOR' | ||
| Gamma Ray (GAPI) | 598–785 | 100% | pass | r 0.99 median, error 0.6% of scale, 7% below r 0.8 (n 411) | LAS |
| LINE TENSION (Ib) | 598–785 | 79% | 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%; curve name not recognized: 'LINE TENSION' | ||
| CNLS (pu) | 798–1005 | 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 69%; curve name not recognized: 'CNLS' | ||
| CORRECTION (g/cc) | 798–1005 | 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 33%; curve name not recognized: 'CORRECTION' | ||
| DCAL (in) | 798–1005 | 31% | 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 31%; curve name not recognized: 'DCAL' | ||
| DPOR (pu) | 798–1005 | 49% | 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%; curve name not recognized: 'DPOR' | ||
| Gamma Ray (GAPI) | 798–1005 | 100% | pass | r 0.99 median, error 0.6% of scale, 7% below r 0.8 (n 411) | LAS |
| LINE TENSION (Ib) | 798–1005 | 75% | 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' | ||
| CNLS (pu) | 1048–1225 | 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 69%; curve name not recognized: 'CNLS' | ||
| CORRECTION (g/cc) | 1048–1225 | 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 49%; curve name not recognized: 'CORRECTION' | ||
| DCAL (in) | 1048–1225 | 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%; curve name not recognized: 'DCAL' | ||
| DPOR (pu) | 1048–1225 | 49% | 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%; curve name not recognized: 'DPOR' | ||
| Gamma Ray (GAPI) | 1048–1225 | 100% | pass | r 0.99 median, error 0.6% of scale, 7% below r 0.8 (n 411) | LAS |
| LINE TENSION (Ib) | 1048–1225 | 75% | 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' | ||
| CORRECTON (g/cc) | 1145–1360 | 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 61%; curve name not recognized: 'CORRECTON' |
"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
| Aquifer | ARAPAHOE |
|---|---|
| Designated basin | N/A |
| Total depth | 1350.0 ft |
| Perforated interval | 838.0–1318.0 ft |
| Ground elevation | 5940.0 ft |
| Reported yield | 150.0 gpm |
| Permit | 61429 |
| Location | 39.50000, -104.98000 |
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.