Decatur County Bridge Report Card

Decatur 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

Decatur County, Indiana

Decatur County has 220 bridges in the National Bridge Inventory, with 13 rated poor and 5 rated scour-critical. Its poor-condition share of 5.9% is above the 5.3% statewide average. Poor-condition bridges carry about 3,180 daily vehicle crossings.

220Total Bridges

13Poor (5.9%)

134Fair (60.9%)

5Scour-Critical

Quote-Ready Local Facts

5.9%of county bridges are in poor condition, compared with 5.3% statewide and 6.7% nationally.

3,180daily vehicle crossings are on poor-condition bridges in the county.

5bridges are rated scour-critical, or 2.3% of the county bridge inventory.

Copyable Facts for Reporters

BridgeLookup.com gives Decatur County a Bridge Condition Exposure Score of 81/100 (B). The county has 220 bridges in the National Bridge Inventory, including 13 in poor condition and 5 rated scour-critical. Poor-condition bridges carry about 3,180 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	5.9%	11.8
Poor-condition traffic exposure	25	1.1% of measured traffic	0.8
Scour-critical bridge share	20	2.3%	4.5
Average age vs national baseline	10	54 years vs 48 nationally	2.3
Traffic-data completeness	5	297,547 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	5.9%
State Poor-Condition Share	5.3%
National Poor-Condition Share	6.7%
County Scour-Critical Share	2.3%
Average Bridge Age	54 years
Poor-Condition Traffic Exposure	3,180 vehicles/day

Bridges to Watch

Busiest Poor-Condition BridgeMain ST over Millstone Creek — 1,210 vehicles/day Oldest Listed BridgeLayton DR over Sand Creek — built in 1880 All County BridgesBrowse every bridge record in Decatur County.

Top Bridges to Watch in Decatur County

Bridge	Reason	Condition	Daily Traffic	Year Built
Main ST over Millstone Creek	Poor condition + traffic exposure	Poor	1,210	1935
CR 700w over Clifty Creek	Poor condition + traffic exposure	Poor	430	1890
CR 900s over Square Run	Poor condition + traffic exposure	Poor	250	1925
CR 200s over Clifty Creek	Poor condition + traffic exposure	Poor	180	1912
CR 225e over Middle Fork Clifty Creek	Poor condition + traffic exposure	Poor	140	1890
CR 50n over Salt Creek	Poor condition + traffic exposure	Poor	140	1915
CR 400e over South Br Clifty Creek	Poor condition + traffic exposure	Poor	140	1975
CR 120e over Muddy Fork Of Sand Creek	Poor condition + traffic exposure	Poor	140	1979
CR 180e over Cobbs Fork Sand Creek	Poor condition + traffic exposure	Poor	110	1895
CR 1000w over Fall Fork Clifty Creek	Poor condition + traffic exposure	Poor	110	1923

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.