MOD-02 Geotechnical Intelligence

NYC's subsurface.
Modeled.

Kriging-interpolated bedrock depth, groundwater elevation, fill probability, and soil classification at any NYC coordinate — derived from 112,000+ boring observations. Know what's underground before you commission a single drill.

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Depth (ft)Stratum
0 – 4
Fill / Urban debris
4 – 11
Loose sand & gravel
11 – 18
Soft marine clay
18 – 24
Dense glacial till
24.3
Bedrock refusal
Kriging Prediction — [Subject Property]
Bedrock depth 23.1 ft [P10: 19.4 / P90: 26.8]
Groundwater 8.4 ft [P10: 6.1 / P90: 11.2]
Fill probability 87% High
Dominant soil Marine clay / glacial till
112K+
Boring Observations
38K+
Kriging Grid Nodes
17K+
Bedrock Depth Points
P10–P90
Confidence Bounds on All Predictions
How it works

Not a database.
A model.

Most subsurface data tools return nearby boring logs and leave interpretation to the engineer. BuildNYC runs a city-wide kriging interpolation across all 112,000+ observations — producing a continuous probabilistic model of the subsurface at any coordinate in all five boroughs.

Every prediction ships with P10 and P90 confidence bounds derived from the variogram model and local observation density, so you know exactly how much to trust the estimate before committing to a site investigation budget.

Prediction at any coordinate
Bedrock depth, groundwater, fill thickness, soil class — without drilling
Confidence bounds
P10 / P90 intervals from kriging variance and local observation density
Fill probability mapping
Identify filled land, former wetlands, and made ground citywide
Foundation intelligence
Bearing capacity, pile type, and refusal depth from adjacent borings
Capabilities
Kriging Subsurface Model
Geostatistical interpolation across 112K observations produces continuous predicted surfaces for bedrock depth, groundwater, and fill — with variogram-derived P10/P90 confidence intervals at every grid node across all five boroughs.
Ordinary KrigingP10/P90Variogram5 Boroughs
Boring Log Archive
112,000+ geotechnical observations from DOB submissions, city agency projects, and public works — normalized, geocoded, and indexed with stratigraphy, SPT values, groundwater readings, and bearing capacity by depth interval.
SPT N-valuesStratigraphyGW DepthBedrock Type
Foundation Risk Profiling
Bearing capacity estimates, recommended pile types, pile tip elevations, and refusal depths extracted from adjacent borings — enabling pre-acquisition foundation cost assessment without commissioning a site-specific investigation.
Bearing CapacityPile TypeRefusal DepthTip Elevation
Fill & Contamination Mapping
Predicted fill probability and fill thickness across all parcels — from historic fill records, surficial geology, and boring log classification. Identifies former wetlands, landfill extents, and sites with elevated settlement or contamination risk.
Fill ProbabilityDEC BCP SitesSurficial GeologySettlement Risk
Data Sources
DOB Geotechnical Submissions NYC DEP Boring Logs USGS Geologic Logs NYSDOT Geotechnical Reports DDC Contract Investigations DEC BCP Site Data NYC Surficial Geology USGS Bedrock Geology
Available now

2028 is a long time
to wait.

The subsurface intelligence your deal team needs exists today — in 112,000+ boring logs already submitted to city agencies. BuildNYC has indexed, normalized, and modeled it. No multi-year data collection program required.

Citywide kriging modelLive
112K+ boring observationsLive
P10/P90 confidence boundsLive
Leading firm report archiveLive
Utility infrastructure layerRoadmap

Eliminate subsurface uncertainty.

Get a probabilistic subsurface profile for any NYC parcel before committing your site investigation budget. Bedrock depth, groundwater, fill probability, and foundation recommendations — in seconds.

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MOD-02 — Geotechnical Intelligence

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