Surface elevations

USGS 3DEP bare-earth elevation samples tied to the six accepted drill collars.

Preliminary source check

What this adds. MineONE samples the public USGS 3DEP elevation service at each drill collar, records the source and resolution, and converts logged interval depths to estimated elevations in feet. USGS 3DEP samples returned 1-meter cells at these collar locations; the local tile’s vertical datum realization and accuracy report still need verification, so these are planning values rather than survey control.

Drill collars6

Saved collar elevations6

Reported DEM pixel size1.0 m

Collar sample runSep 28, 2026 8:54 PM

Property grid DEM points12901 / 12901

Valid surface coverage100.0%

Surface run statusComplete

DEM vertical referenceProvisional NAVD88

Ground elevation at drill collars

Each elevation is sampled at the collar’s recorded latitude and longitude from the USGS 3DEP dynamic bare-earth DEM service. Values are shown in feet and meters; depths remain exactly as logged.

Drill hole	Latitude	Longitude	Elevation ft · provisional	Meters	Grid size	Raster ID
MACK 1	30.882528	-93.439012	104.61 ft	31.886 m	1.0 m	114203
MACK 2	30.885640	-93.443090	119.21 ft	36.336 m	1.0 m	114203
MACK 3	30.888102	-93.441258	118.36 ft	36.076 m	1.0 m	114203
MACK 4	30.887291	-93.439211	114.72 ft	34.967 m	1.0 m	114203
MACK 5B	30.886593	-93.438647	108.27 ft	33.001 m	1.0 m	114203
MACK 7	30.884239	-93.437953	105.43 ft	32.136 m	1.0 m	114203

Saved runs stay available for comparison.

Elevation range

DEM ground elevations across the available drill collars.

MACK 1

104.6 ft

MACK 2

119.2 ft

MACK 3

118.4 ft

MACK 4

114.7 ft

MACK 5B

108.3 ft

MACK 7

105.4 ft

Lowest sample104.61 ft

Highest sample119.21 ft

Source and quality

ProviderUSGS 3DEP

Sample resolution1.0 meter grid

Vertical referenceNAVD88 · verify tile

Service data through2026-08-24

The service returned a 1-meter grid sample at each collar. This dynamic service does not include the parcel-specific checkpoint report, source-tile vertical accuracy, or datum realization in the sample response. Treat derived contact elevations as preliminary until the source-tile metadata is verified.

A 1-meter pixel describes horizontal grid spacing; it does not mean vertical accuracy is 1 meter or 1 foot. We must verify the exact source tile and its checkpoint statistics before using these elevations as survey control.

Drill-log intervals expressed as elevations

Top elevation = collar ground elevation − logged interval top depth. Base elevation = collar ground elevation − logged interval bottom depth. Original log depths and classifications are unchanged.

Hole	Logged material	From depth	To depth	Top elevation	Base elevation
MACK 1	Overburden	0.0 ft	3.0 ft	104.61 ft	101.61 ft
MACK 1	Silty sand	3.0 ft	40.0 ft	101.61 ft	64.61 ft
MACK 1	Clay	40.0 ft	45.0 ft	64.61 ft	59.61 ft
MACK 1	Sand with trace gravel	45.0 ft	50.0 ft	59.61 ft	54.61 ft
MACK 1	Sand and gravel	50.0 ft	60.0 ft	54.61 ft	44.61 ft
MACK 1	Clay	60.0 ft	76.0 ft	44.61 ft	28.61 ft
MACK 2	Overburden	0.0 ft	3.0 ft	119.21 ft	116.21 ft
MACK 2	Clay	3.0 ft	10.0 ft	116.21 ft	109.21 ft
MACK 2	Fine sand	10.0 ft	20.0 ft	109.21 ft	99.21 ft
MACK 2	Sand with trace gravel	20.0 ft	25.0 ft	99.21 ft	94.21 ft
MACK 2	Sand and gravel	25.0 ft	55.0 ft	94.21 ft	64.21 ft
MACK 2	Gravel with sand	55.0 ft	60.0 ft	64.21 ft	59.21 ft
MACK 2	Sand and gravel	60.0 ft	65.0 ft	59.21 ft	54.21 ft
MACK 2	Clay	65.0 ft	76.0 ft	54.21 ft	43.21 ft
MACK 3	Overburden	0.0 ft	3.0 ft	118.36 ft	115.36 ft
MACK 3	Fine sand	3.0 ft	20.0 ft	115.36 ft	98.36 ft
MACK 3	Sand with trace gravel	20.0 ft	30.0 ft	98.36 ft	88.36 ft
MACK 3	Sand and gravel	30.0 ft	45.0 ft	88.36 ft	73.36 ft
MACK 3	Sand with trace gravel	45.0 ft	55.0 ft	73.36 ft	63.36 ft
MACK 3	Sand and gravel	55.0 ft	65.0 ft	63.36 ft	53.36 ft
MACK 3	Gravel with sand	65.0 ft	70.0 ft	53.36 ft	48.36 ft
MACK 3	Sand and gravel	70.0 ft	76.0 ft	48.36 ft	42.36 ft
MACK 3	Clay	76.0 ft	86.0 ft	42.36 ft	32.36 ft
MACK 4	Overburden	0.0 ft	3.0 ft	114.72 ft	111.72 ft
MACK 4	Fine sand	3.0 ft	20.0 ft	111.72 ft	94.72 ft
MACK 4	Sand with trace gravel	20.0 ft	25.0 ft	94.72 ft	89.72 ft
MACK 4	Sand and gravel	25.0 ft	80.0 ft	89.72 ft	34.72 ft
MACK 4	Sand with trace gravel	80.0 ft	90.0 ft	34.72 ft	24.72 ft
MACK 4	Fine sand	90.0 ft	100.0 ft	24.72 ft	14.72 ft
MACK 4	Sand with trace gravel	100.0 ft	110.0 ft	14.72 ft	4.72 ft
MACK 4	Silty sand	110.0 ft	116.0 ft	4.72 ft	-1.28 ft
MACK 5B	Overburden	0.0 ft	3.0 ft	108.27 ft	105.27 ft
MACK 5B	Fine sand	3.0 ft	15.0 ft	105.27 ft	93.27 ft
MACK 5B	Sand with trace gravel	15.0 ft	40.0 ft	93.27 ft	68.27 ft
MACK 5B	Gravel with sand	40.0 ft	50.0 ft	68.27 ft	58.27 ft
MACK 5B	Sand with trace gravel	50.0 ft	55.0 ft	58.27 ft	53.27 ft
MACK 5B	Silty sand	55.0 ft	60.0 ft	53.27 ft	48.27 ft
MACK 5B	Gravel with sand	60.0 ft	65.0 ft	48.27 ft	43.27 ft
MACK 5B	Sand and gravel	65.0 ft	70.0 ft	43.27 ft	38.27 ft
MACK 5B	Gravel with sand	70.0 ft	80.0 ft	38.27 ft	28.27 ft
MACK 5B	Clay	80.0 ft	86.0 ft	28.27 ft	22.27 ft
MACK 7	Overburden	0.0 ft	3.0 ft	105.43 ft	102.43 ft
MACK 7	Silty sand	3.0 ft	20.0 ft	102.43 ft	85.43 ft
MACK 7	Sand and gravel	20.0 ft	30.0 ft	85.43 ft	75.43 ft
MACK 7	Sand with trace gravel	30.0 ft	35.0 ft	75.43 ft	70.43 ft
MACK 7	Sand and gravel	35.0 ft	60.0 ft	70.43 ft	45.43 ft
MACK 7	Gravel with sand	60.0 ft	65.0 ft	45.43 ft	40.43 ft
MACK 7	Fine sand	65.0 ft	80.0 ft	40.43 ft	25.43 ft
MACK 7	Clay	80.0 ft	96.0 ft	25.43 ft	9.43 ft

Connect the property surface to the one-foot model

MineONE samples the DEM at every block-model plan-cell centroid, converts meters to feet, and rebuilds the same drill-log model using absolute elevation bands. Each block then carries its top and bottom elevation, classification, product split, tonnage, value, and confidence on one shared spatial run.

DEM grid runComplete

Coverage12,901 / 12,901 cells

Linked model runElevation integrated

Vertical methodAbsolute elevation, 1-ft bands

This takes the current model parameters forward and leaves the current complete run active until the rebuild finishes.

Bare-earth topography is not submerged pond-floor bathymetry; verify source-tile datum realization and vertical accuracy before survey-grade use.

USGS source: 3DEP bare-earth DEM dynamic service. Its bare-earth surface does not supply pond-floor bathymetry. Bathymetry/sonar will be needed before treating submerged blocks as dredge-ready elevations.