Datasets:

sweetapricity
/

bridgedeck-nshm

lon float64 -125 -65	lat float64 24.6 50	pga_2pct_50yr float64 0.01 2.14	sa0p2_2pct_50yr float64 0.01 4.67	sa1p0_2pct_50yr float64 0 1.53
-124.8	24.6	0.005	0.005	0.0025
-124.85	24.6	0.005	0.005	0.0025
-124.95	24.6	0.005	0.005	0.0025
-124.75	24.6	0.005	0.005	0.0025
-124.55	24.6	0.005	0.005	0.0025
-124.35	24.6	0.005	0.005	0.0025
-125	24.6	0.005	0.005	0.0025
-124.7	24.6	0.005	0.005	0.0025
-124.2	24.6	0.005	0.005	0.0025
-124.9	24.6	0.005	0.005	0.0025
-123.95	24.6	0.005	0.005	0.0025
-124.6	24.6	0.005	0.005	0.0025
-124.65	24.6	0.005	0.005	0.0025
-124.05	24.6	0.005	0.005	0.0025
-123.85	24.6	0.005	0.005	0.0025
-123.75	24.6	0.005	0.005	0.0025
-124.45	24.6	0.005	0.005	0.0025
-124.4	24.6	0.005	0.005	0.0025
-124.5	24.6	0.005	0.005	0.0025
-124.3	24.6	0.005	0.005	0.0025
-123.6	24.6	0.005	0.005	0.0025
-124.15	24.6	0.005	0.005	0.0025
-123.65	24.6	0.005	0.005	0.0025
-124.1	24.6	0.005	0.005	0.0025
-123.4	24.6	0.005	0.005	0.0025
-123.35	24.6	0.005	0.005	0.0025
-123.25	24.6	0.005	0.005	0.0025
-124.25	24.6	0.005	0.005	0.0025
-124	24.6	0.005	0.005	0.0025
-123.8	24.6	0.005	0.005	0.0025
-123.9	24.6	0.005	0.005	0.0025
-123.05	24.6	0.005	0.005	0.0025
-123.15	24.6	0.005	0.005	0.0025
-123.7	24.6	0.005	0.005	0.0025
-123.45	24.6	0.005	0.005	0.0025
-122.9	24.6	0.005	0.005	0.0025
-123.5	24.6	0.005	0.005	0.0025
-122.7	24.6	0.005	0.005	0.0025
-123.55	24.6	0.005	0.005	0.0025
-122.95	24.6	0.005	0.005	0.0025
-122.75	24.6	0.005	0.005	0.0025
-122.45	24.6	0.005	0.005	0.0025
-122.55	24.6	0.005	0.005	0.0025
-123.2	24.6	0.005	0.005	0.0025
-123.1	24.6	0.005	0.005	0.0025
-122.6	24.6	0.005	0.005	0.0025
-123.3	24.6	0.005	0.005	0.0025
-123	24.6	0.005	0.005	0.0025
-122.8	24.6	0.005	0.005	0.0025
-122.25	24.6	0.005	0.005	0.0025
-122.1	24.6	0.005	0.005	0.0025
-122.2	24.6	0.005	0.005	0.0025
-122.85	24.6	0.005	0.005	0.0025
-122.65	24.6	0.005	0.005	0.0025
-122.5	24.6	0.005	0.005	0.0025
-122.4	24.6	0.005	0.005	0.0025
-121.75	24.6	0.005	0.005	0.0025
-121.8	24.6	0.005	0.005	0.0025
-122.3	24.6	0.005	0.005	0.0025
-121.7	24.6	0.005	0.005	0.0025
-122.05	24.6	0.005	0.005	0.0025
-122.35	24.6	0.005	0.005	0.0025
-121.6	24.6	0.005	0.005	0.0025
-122.15	24.6	0.005	0.005	0.0025
-121.95	24.6	0.005	0.005	0.0025
-121.9	24.6	0.005	0.005	0.0025
-121.85	24.6	0.005	0.005	0.0025
-122	24.6	0.005	0.005	0.0025
-121.35	24.6	0.005	0.005	0.0025
-121.45	24.6	0.005	0.005	0.0025
-121.3	24.6	0.005	0.005	0.0025
-121.4	24.6	0.005	0.005	0.0025
-121.65	24.6	0.005	0.005	0.0025
-121	24.6	0.005	0.005	0.0025
-121.15	24.6	0.005	0.005	0.0025
-121.5	24.6	0.005	0.005	0.0025
-121.55	24.6	0.005	0.005	0.0025
-121.05	24.6	0.005	0.005	0.0025
-121.25	24.6	0.005	0.005	0.0025
-120.6	24.6	0.005	0.005	0.0025
-121.2	24.6	0.005	0.005	0.0025
-120.45	24.6	0.005	0.005	0.0025
-120.5	24.6	0.005	0.005	0.0025
-120.65	24.6	0.005	0.005	0.0025
-120.25	24.6	0.005	0.005	0.0025
-120.35	24.6	0.005	0.005	0.0025
-121.1	24.6	0.005	0.005	0.0025
-120.15	24.6	0.005	0.005	0.0025
-120.95	24.6	0.005	0.005	0.0025
-120.05	24.6	0.005	0.005	0.0025
-120.85	24.6	0.005	0.005	0.0025
-120.9	24.6	0.005	0.005	0.0025
-120	24.6	0.005	0.005	0.0025
-120.75	24.6	0.005	0.005	0.0025
-119.9	24.6	0.005	0.005	0.0025
-119.85	24.6	0.005	0.005	0.0025
-120.7	24.6	0.005	0.005	0.0025
-119.75	24.6	0.005	0.005	0.0025
-119.8	24.6	0.005	0.005	0.0025
-120.55	24.6	0.005	0.005	0.0025

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Bridgedeck — USGS Seismic Hazard at Bridge Locations (NSHM 2014)

Part of the bridgedeck dataset collection for US bridge deck deterioration research.

Overview

Seismic ground shaking hazard values sampled at every CONUS bridge location from the USGS 2014 National Seismic Hazard Model (NSHM). Three spectral acceleration metrics at the 2% probability of exceedance in 50 years (≈ 2,475-year return period) — the standard used in US building and bridge design codes.

Seismic hazard (sa1p0_2pct_50yr) ranks #7 in the bridgedeck XGBoost feature importance, confirming that earthquake exposure contributes to long-term bridge deck deterioration beyond direct structural damage.

Source

Source: USGS National Seismic Hazard Model (2014)

API: USGS static hazard curve API queried on a 0.05° grid covering CONUS (625,721 grid points). Bridge values obtained via nearest-neighbour lookup (scipy KDTree, max distance ~3.5 km).

Note: The 2023 NSHM update exists but requires ScienceBase authentication for grid data. The 2014 model is the current AASHTO bridge design code standard and sufficient for this application.

Schema

One row per bridge. Primary key: bridge_id.

Column	Type	Description
`bridge_id`	str	`{state_fips}_{county_fips}_{structure_number}` — joins to NBI
`pga_2pct_50yr`	float	Peak Ground Acceleration (g) at 2% prob. exceedance in 50 yr
`sa0p2_2pct_50yr`	float	Spectral Acceleration at 0.2s (g), same return period
`sa1p0_2pct_50yr`	float	Spectral Acceleration at 1.0s (g), same return period

Coverage

CONUS only — AK and HI are excluded (different NSHM models).
~1.6% null values for bridges at ocean/territory coordinates outside the USGS grid.
Static feature — does not vary by year. Join once and broadcast across all years for a given bridge.

Join Key

Join to NBI bridge data on bridge_id.

Related Datasets

Repo	Description
`sweetapricity/bridgedeck-nbi`	National Bridge Inventory — structural features, 2000–2023
`sweetapricity/bridgedeck-prism`	PRISM climate features at bridge locations, 2000–2023
`sweetapricity/bridgedeck-noaa`	NOAA storm event counts by county, 2000–2023
`sweetapricity/bridgedeck-nshm`	This dataset — USGS seismic hazard at bridge locations (static)
`sweetapricity/bridgedeck-nfhl`	FEMA flood zone classification at bridge locations (static)
`sweetapricity/bridgedeck-salt`	USGS road salt tiers by state (static)

Paper

Ibrahim, A., Abdelkhalek, S., Zayed, T., Qureshi, A. H., & Mohammed Abdelkader, E. (2024). A comprehensive review of the key deterioration factors of concrete bridge decks. Buildings, 14(11), 3425.

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