bridge_id stringlengths 8 22 | latitude float64 -8.5 101 | longitude float64 -179.6 99 | fld_zone stringclasses 10
values | sfha_tf stringclasses 3
values |
|---|---|---|---|---|
02_068_1146 | 63.76395 | -148.907419 | null | null |
02_240_0839 | 64.0581 | -141.7663 | null | null |
02_220_100310000001421 | 57.425 | -134.991667 | null | null |
02_010_1953 | 52.234289 | -174.182281 | null | null |
02_020_1951 | 61.608267 | -149.073067 | AE | T |
02_010_1946 | 54.133139 | -165.777239 | null | null |
02_010_1945 | 54.862556 | -163.411461 | null | null |
02_070_1932 | 56.296925 | -158.409194 | D | F |
02_261_1928 | 60.077222 | -147.999722 | null | null |
02_201_1895 | 55.605833 | -132.455833 | null | null |
02_220_100310000001333 | 57.515 | -135.898333 | null | null |
02_201_1894 | 55.6051 | -132.4547 | null | null |
02_201_1893 | 55.5865 | -132.4486 | null | null |
02_231_1891 | 59.497372 | -135.361294 | null | null |
02_010_1890 | 55.056142 | -162.324869 | null | null |
02_170_1885 | 61.4815 | -149.2532 | A | T |
02_010_1824 | 53.879233 | -166.540089 | null | null |
02_220_100310000001149 | 57.53 | -134.888333 | null | null |
02_070_1800 | 56.309283 | -158.537022 | D | F |
02_070_1764 | 56.300719 | -158.415389 | D | F |
02_010_1756 | 55.331853 | -160.503958 | null | null |
02_010_1755 | 55.207342 | -162.695917 | null | null |
02_261_1746 | 61.954167 | -145.323333 | null | null |
02_261_1744 | 61.133611 | -146.386389 | AE | T |
02_220_100310000001148 | 57.516667 | -134.9 | null | null |
02_201_1731 | 55.4043 | -132.8265 | null | null |
02_201_1730 | 55.409167 | -132.831389 | null | null |
02_201_1721 | 55.9511 | -133.236 | null | null |
02_201_1719 | 55.8996 | -133.148 | null | null |
02_201_1717 | 55.9054 | -133.0076 | null | null |
02_185_1691 | 66.894814 | -162.576894 | null | null |
02_220_100310000001147 | 57.501667 | -134.968333 | null | null |
02_185_1690 | 66.895075 | -162.566683 | null | null |
02_010_1686 | 53.896706 | -166.459125 | null | null |
02_261_1679 | 60.065556 | -148.015833 | null | null |
02_201_1608 | 55.354444 | -132.840556 | null | null |
02_201_1607 | 55.3427 | -132.8465 | null | null |
02_201_1606 | 55.33 | -132.859167 | null | null |
02_201_1605 | 55.311667 | -132.8675 | null | null |
02_231_2028 | 60.028333 | -141.931667 | null | null |
02_201_1569 | 55.283611 | -132.828056 | null | null |
02_201_1568 | 55.269 | -132.829 | null | null |
02_201_1567 | 55.2481 | -132.826 | null | null |
02_201_1566 | 55.209722 | -132.816389 | null | null |
02_185_1560 | 66.855078 | -150.566117 | null | null |
02_231_2027 | 60.026667 | -141.946667 | null | null |
02_010_1536 | 54.8513 | -163.412244 | null | null |
02_010_1531 | 53.860942 | -166.512183 | null | null |
02_185_1515 | 67.935175 | -149.818508 | null | null |
02_185_1514 | 67.512306 | -149.852197 | null | null |
02_185_1513 | 66.032531 | -150.130603 | null | null |
02_070_1512 | 55.911639 | -159.149189 | null | null |
02_231_2026 | 60.026667 | -141.943333 | null | null |
02_170_1501 | 61.406097 | -149.465203 | AE | T |
02_261_1499 | 60.545636 | -145.759431 | X | F |
02_231_1491 | 57.956944 | -136.220278 | null | null |
02_231_1490 | 59.52865 | -135.348672 | null | null |
02_280_1468 | 56.9232 | -133.8206 | null | null |
02_280_1467 | 56.950186 | -133.872694 | null | null |
02_231_2025 | 60.02 | -141.928333 | null | null |
02_201_1464 | 55.709444 | -132.602778 | null | null |
02_201_1463 | 55.709167 | -132.614444 | null | null |
02_170_1209 | 61.449861 | -149.808936 | null | null |
02_201_1462 | 55.7057 | -132.6271 | null | null |
02_201_1461 | 55.686667 | -132.635556 | null | null |
02_201_1458 | 55.687222 | -132.729444 | null | null |
02_201_1457 | 55.690556 | -132.769722 | null | null |
02_201_1456 | 55.693889 | -132.775833 | null | null |
02_063_1203 | 61.083333 | -146.306111 | AE | T |
02_201_1455 | 55.699722 | -132.849167 | null | null |
02_231_2024 | 60.02 | -141.923333 | null | null |
02_280_1453 | 56.809961 | -132.955861 | null | null |
02_290_1200 | 63.049636 | -156.285267 | null | null |
02_231_1451 | 57.779206 | -135.219492 | null | null |
02_122_1199 | 59.716944 | -151.646111 | null | null |
02_185_1438 | 67.319686 | -150.162308 | null | null |
02_185_1437 | 66.884625 | -150.525225 | null | null |
02_282_1196 | 59.473569 | -139.609631 | null | null |
02_185_1436 | 66.846272 | -150.581556 | null | null |
02_066_1195 | 61.374444 | -143.348889 | null | null |
02_010_1435 | 53.852158 | -166.569208 | null | null |
02_066_1194 | 61.438056 | -143.718611 | null | null |
02_261_1429 | 61.124022 | -146.365689 | VE | T |
02_066_1193 | 61.455278 | -143.763889 | null | null |
02_231_1426 | 57.957667 | -136.2274 | null | null |
02_231_2022 | 60.07 | -142.375 | null | null |
02_170_1192 | 61.693256 | -149.245742 | AE | T |
02_261_1424 | 60.776417 | -148.683589 | null | null |
02_231_2023 | 60.07 | -142.386667 | null | null |
02_090_1191 | 64.842614 | -147.778564 | AE | T |
02_231_1417 | 58.390381 | -135.729633 | null | null |
02_068_1190 | 63.874703 | -148.978392 | null | null |
02_280_1409 | 56.3424 | -132.339 | null | null |
02_150_1189 | 57.788697 | -152.397369 | null | null |
02_010_1407 | 53.872086 | -166.532608 | null | null |
02_110_1188 | 58.330278 | -134.473611 | X | F |
02_010_1386 | 53.874219 | -166.546681 | null | null |
02_063_1187 | 60.444756 | -145.075425 | null | null |
02_261_1384 | 61.090556 | -145.889444 | X | F |
02_261_1383 | 61.089444 | -145.889444 | X | F |
End of preview. Expand in Data Studio
Bridgedeck — FEMA National Flood Hazard Layer at Bridge Locations (NFHL)
Part of the bridgedeck dataset collection for US bridge deck deterioration research.
Overview
FEMA flood zone designation queried at each unique US bridge location from the National Flood Hazard Layer (NFHL) via the FEMA ArcGIS REST API. Flood zone exposure is a key force-majeure deterioration factor — bridges in floodplains experience more frequent inundation, scour, debris impact, and moisture exposure.
Source
Source: FEMA National Flood Hazard Layer API: FEMA ArcGIS REST API — queried per bridge lat/lon (~906k calls, resumable) Coverage: CONUS, static (updated periodically as new flood studies are completed)
Contents
| File | Description |
|---|---|
nfhl_bridge_zones.csv |
Raw flood zone query results for each bridge location |
Schema
| Column | Type | Description |
|---|---|---|
bridge_id |
str | {state_fips}_{county_fips}_{structure_number} — joins to NBI |
fld_zone |
str | Raw FEMA flood zone code (AE, X, VE, etc.) |
sfha_tf |
str | FEMA SFHA flag: T=in Special Flood Hazard Area, F=not |
Features Derived
After running make etl-nfhl, the following features are added to the panel:
| Feature | Description |
|---|---|
fld_zone |
Raw FEMA flood zone code (AE, X, VE, etc.) |
in_sfha |
Boolean: bridge in Special Flood Hazard Area (100-year floodplain) |
in_100yr |
Boolean: bridge in 100-year floodplain (derived from zone code) |
in_500yr |
Boolean: bridge in Zone X (500-year floodplain, moderate hazard) |
Flood Zone Classification
| Zone | Description | in_sfha |
in_100yr |
in_500yr |
|---|---|---|---|---|
| AE, A, A1-A30 | 100-year floodplain, base flood elevation determined | ✓ | ✓ | — |
| VE, V, V1-V30 | Coastal high-hazard area (wave action) | ✓ | ✓ | — |
| AO, AH | Shallow flooding | ✓ | ✓ | — |
| X (shaded) | 500-year floodplain (moderate hazard) | — | — | ✓ |
| X (unshaded) | Minimal flood hazard | — | — | — |
| D | Undetermined flood hazard | — | — | — |
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 |
USGS seismic hazard at bridge locations (static) |
sweetapricity/bridgedeck-nfhl |
This dataset — FEMA flood zone 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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