Worcester CountyMassachusetts
Auburn, Massachusetts
9 of its 46 inventoried bridges are rated poor (20%, against 9% statewide). Bedrock sits a median 20 ft down across 226 logs, shallower than the Massachusetts median of 24 ft.
- Live · as of Sep 11, 2026
- 9 public sources · method
- ← All towns
Median depth to bedrock
20 ft
middle half 9–35 ft · 226 logs
Bridges rated poor
9
of 46 inventoried
State resilience grants
$334K
2 awards on file
FEMA repair $, Worcester County
$85.3M
federal share since 2010 · county-wide
01 · Bridges
9 of 46 bridges are rated poor — above the Massachusetts rate of 9%
Every highway bridge and large culvert in the 2025 National Bridge Inventory that stands inside Auburn. Median age 67 years; 4 posted for weight.
11% good, 20% poor
FHWA good / fair / poor rating — the lowest of deck, superstructure, substructure or culvert.
- Good5 · 11%
- Fair32 · 70%
- Poor9 · 20%
Structures by decade built
n = 46 structuresSource: FHWA National Bridge Inventory 2025
▸ Show the numbers▾ Hide the numbers
| Built | Structures |
|---|---|
| pre-1910 | 1 |
| 1930s | 2 |
| 1950s | 20 |
| 1960s | 20 |
| 1970s | 1 |
| 1990s | 2 |
The poor-rated bridges
| Carries | Over | Built | Daily traffic |
|---|---|---|---|
| I 90 EB | ST 12 SOUTHBRIDGE ST | 1957 | 42,886 |
| I 90 WB | ST 12 SOUTHBRIDGE ST | 1957 | 41,794 |
| I 90 EB | CNTRL MLBRY & PWRR | 1957 | 41,235 |
| OXFORD STposted | KETTLE BROOK | 1880 | 22,200 |
| US 20 EB/WSHNGTNposted | I 395 | 1965 | 10,144 |
| US 20 WB/WSHNGTN | I 395 | 1965 | 10,027 |
| BRN MWR AVE | I 90 | 1957 | 1,744 |
| BANCROFT STposted | I 90 | 1957 | 1,400 |
| PINROCK RD | WORC DVRSN CHANNEL | 1957 | 357 |
02 · Ground
Rock turns up a median 20 ft down
From 226 depth-to-rock records inside Auburn (MassGIS / MGS borings & well logs). Logs cluster where people drill wells and bore for roads, so treat this as the town’s pattern, not a site answer.
Half of Auburn's logs reach rock between 9 and 35 ft
Depth to bedrock: 10th–90th percentile whisker, middle-half box, median tick; dashed line = Massachusetts median.
median 20 ftMA 24 ft
0204060 ft
n = 226 logsSource: MassGIS / MGS borings & well logs
▸ Show the numbers▾ Hide the numbers
| Depth to rock (ft) | Logs |
|---|---|
| 0–5 | 18 |
| 5–10 | 43 |
| 10–20 | 49 |
| 20–50 | 82 |
| 50–100 | 34 |
| 100+ | 0 |
Rock within 10 ft
33%
of logs (23% across Massachusetts). Shallow rock means ledge in excavations, refusal for driven piles and rock anchors rather than soil nails; deep ground means taller shoring and more groundwater. 14% of logs here go past 50 ft.
03 · Money & permits
$334K in state resilience grants, 2 awards
| Project | Year | Award |
|---|---|---|
| Leesville Pond Dam Repair | FY2019 | $189K |
| Develop Protection Measures for Vulnerable Drinking Water Supply Areas and Evaluate Green Bridge Design | FY2020 | $145K |
04 · Dams & disasters
Worcester County has drawn $85.3M in federal disaster repair since 2010
FEMA Public Assistance is reported by county, so the figure below is Worcester County-wide context, not a Auburn number.
FEMA Public Assistance, Worcester County
$85.3M
Federal share obligated across 882 projects in 9 declared disasters since 2010. The largest category is emergency protective measures (91%); roads & bridges took $723K.
05 · Next door
Auburn and the 4 towns that border it
A dash means no data for that layer, not zero.
| Town | Poor bridges | Rock depth |
|---|---|---|
| Auburn, MA | 9 / 46 | 20 ft |
| Worcester, MA | 8 / 119 | 20 ft |
| Millbury, MA | 1 / 37 | 15 ft |
| Oxford, MA | 3 / 34 | 25 ft |
| Leicester, MA | 0 / 7 | 15 ft |
Where these numbers come from
Method, sources & caveats
Auburn is the Census county subdivision 2502702760 (Worcester County). Every record is placed here by its coordinates, not by the place name the source uses.
- Towns are Census county subdivisions: cities, towns, plantations, and Maine/New Hampshire unorganized territories and townships. Every record is placed in a town by its coordinates (point-in-polygon), not by the source's own place label — so a bridge in Roxbury counts for Boston and a well in 'North Waltham' counts for Waltham.
- Bridges: FHWA NBI 2025, highway structures ≥ 20 ft including large culverts. 'Poor' is FHWA's good/fair/poor rating (lowest of deck, superstructure, substructure or culvert ≤ 4). Percent-poor is shown only for towns with at least 5 structures.
- Depth to bedrock is the median of driller- and boring-reported depths in the town, shown only where at least 10 logs exist. Water-well logs over-sample rural lots and hilltops; one town median never describes a particular site.
- Bedrock depths use the same state databases and filters as the Bedrock & soils module (bedrock wells and borings that reached rock, 0 < depth ≤ 400 ft, exact re-filings dropped), but every log is placed in a town by its coordinates rather than the driller's town field, so town counts can differ slightly between the two pages. Connecticut and Rhode Island have no statewide public well-log database with depths.
- Dams: only high-hazard-potential dams whose latest condition assessment is Poor or Unsatisfactory are counted (live NID). Connecticut and Rhode Island assessments may lag.
- FEMA Public Assistance dollars are federal share obligated for disasters declared since 2010, reported by county — they are county context, not a town figure.
- Grant awards are Massachusetts only (EEA Dam & Seawall program, MVP Action grants, CZM Coastal Resilience). Other states' programs are not yet included.
- Ground-related permit counts cover only the municipal portals the pipeline reads (Boston, Cambridge, Somerville, Worcester, Framingham, Providence, Portsmouth, Hartford and a few others) — an absent count means 'not covered', not zero.
- Data as of
- Sep 11, 2026
- Generated
- Sep 11, 2026
- Records
- 367,748
- Refresh
- Live pull · weekly
- U.S. Census Bureau cartographic boundary files — county subdivisions (2024, 1:500k)Public domain
- FHWA National Bridge Inventory (2025 delimited files)Public domain
- USACE National Inventory of DamsPublic domainHigh-hazard dams rated Poor or Unsatisfactory (live NID).
- USGS U.S. Landslide InventoryPublic domain
- MassGIS / Massachusetts Geological Survey — Bedrock Data PointsPublic recordBorings and well logs that reached rock (MassDEP well drillers, USGS, MWRA, MassDOT…); seismic/HVSR and map-derived shallow-bedrock/outcrop points excluded.
- NH DES Water Well Inventory, Maine Geological Survey Wells Database, Vermont DEC well recordsPublic recordBedrock wells only; driller-reported depth to bedrock / overburden thickness.
- OpenFEMA Public Assistance Funded Projects Details (v2)Public domain
- MA EEA / CZM grant awards — Dam & Seawall, MVP Action, CZM Coastal ResiliencePublic record
- Municipal open-data permit portals (Boston, Cambridge, Somerville, Providence, Portsmouth, others)Public recordOnly permits flagged as ground-related (retaining walls, excavation, foundations) are counted.
Published by Earth Support Corp as a public resource. Regional statistics for planning and curiosity. They are not an engineering report, a bid recommendation or a statement about any particular site, firm or project. Spot an error? Tell us and we will correct it. Full method: methodology.