Porter County Bridge Report Card

Porter County scores 81 out of 100 on BridgeLookup's Bridge Condition Exposure Score, based on FHWA National Bridge Inventory records.

B81 / 100

Local infrastructure snapshot

Porter County, Indiana

Porter County has 279 bridges in the National Bridge Inventory, with 13 rated poor and 7 rated scour-critical. Its poor-condition share of 4.7% is at or below the 5.3% statewide average. Poor-condition bridges carry about 60,392 daily vehicle crossings.

279Total Bridges

13Poor (4.7%)

151Fair (54.1%)

7Scour-Critical

Quote-Ready Local Facts

4.7%of county bridges are in poor condition, compared with 5.3% statewide and 6.7% nationally.

60,392daily vehicle crossings are on poor-condition bridges in the county.

7bridges are rated scour-critical, or 2.5% of the county bridge inventory.

Copyable Facts for Reporters

BridgeLookup.com gives Porter County a Bridge Condition Exposure Score of 81/100 (B). The county has 279 bridges in the National Bridge Inventory, including 13 in poor condition and 7 rated scour-critical. Poor-condition bridges carry about 60,392 daily vehicle crossings. Poor condition does not mean unsafe; bridges judged unsafe are closed or restricted by transportation agencies.

Download all county report-card scores as CSV.

How the Score Breaks Down

Factor	Weight	County Value	Penalty
Poor-condition bridge share	40	4.7%	9.3
Poor-condition traffic exposure	25	2.5% of measured traffic	1.9
Scour-critical bridge share	20	2.5%	5.0
Average age vs national baseline	10	54 years vs 48 nationally	2.4
Traffic-data completeness	5	2,427,866 measured daily crossings	0.0

Score = 100 minus weighted penalties. The score is a comparative research signal, not an official safety rating. Read the full methodology.

County Comparisons

County Poor-Condition Share	4.7%
State Poor-Condition Share	5.3%
National Poor-Condition Share	6.7%
County Scour-Critical Share	2.5%
Average Bridge Age	54 years
Poor-Condition Traffic Exposure	60,392 vehicles/day

Bridges to Watch

Busiest Poor-Condition BridgeI-94 WB over US 20 Eb/wb — 40,435 vehicles/day Oldest Listed BridgeCampbell Avenue over Grand Trunk & Western Rr — built in 1910 All County BridgesBrowse every bridge record in Porter County.

Top Bridges to Watch in Porter County

Bridge	Reason	Condition	Daily Traffic	Year Built
US 12 EB over Burns Ditch (deep River)	Poor condition + traffic exposure	Poor	4,635	1970
US 12 WB over Burns Ditch (deep River)	Poor condition + traffic exposure	Poor	1,763	1970
I-94 WB over US 20 Eb/wb	Poor condition + traffic exposure	Poor	40,435	1969
SR 249g Nelson DR over US 12 2 Rr 2 Roads	Poor condition + traffic exposure	Poor	4,256	2000
CR 200w over Damon Run	Poor condition + traffic exposure	Poor	3,230	1968
Lenburg Road over Salt Creek	Poor condition + traffic exposure	Poor	3,140	1968
CR 600n over Salt Creek	Poor condition + traffic exposure	Poor	1,670	1970
Mineral Spring over Little Calumet River	Poor condition + traffic exposure	Poor	400	1964
CR 300s over Ludington Ditch	Poor condition + traffic exposure	Poor	340	1972
Division Road over Hutton Ditch	Poor condition + traffic exposure	Poor	190	1961

Important safety note

Poor condition does not mean a bridge is unsafe. It means at least one major component has significant deterioration and the bridge is a priority for maintenance, repair, or replacement. Bridges judged unsafe are closed or restricted by transportation agencies.