Mercer County Bridge Report Card

Mercer County scores 57 out of 100 on BridgeLookup's Bridge Condition Exposure Score, based on FHWA National Bridge Inventory records.

F57 / 100

Local infrastructure snapshot

Mercer County, Illinois

Mercer County has 163 bridges in the National Bridge Inventory, with 23 rated poor and 4 rated scour-critical. Its poor-condition share of 14.1% is above the 9.5% statewide average. Poor-condition bridges carry about 6,360 daily vehicle crossings.

163Total Bridges

23Poor (14.1%)

62Fair (38.0%)

4Scour-Critical

Quote-Ready Local Facts

14.1%of county bridges are in poor condition, compared with 9.5% statewide and 6.7% nationally.

6,360daily vehicle crossings are on poor-condition bridges in the county.

4bridges are rated scour-critical, or 2.5% of the county bridge inventory.

Copyable Facts for Reporters

BridgeLookup.com gives Mercer County a Bridge Condition Exposure Score of 57/100 (F). The county has 163 bridges in the National Bridge Inventory, including 23 in poor condition and 4 rated scour-critical. Poor-condition bridges carry about 6,360 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	14.1%	28.2
Poor-condition traffic exposure	25	13.1% of measured traffic	9.8
Scour-critical bridge share	20	2.5%	4.9
Average age vs national baseline	10	43 years vs 48 nationally	0.0
Traffic-data completeness	5	48,705 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	14.1%
State Poor-Condition Share	9.5%
National Poor-Condition Share	6.7%
County Scour-Critical Share	2.5%
Average Bridge Age	43 years
Poor-Condition Traffic Exposure	6,360 vehicles/day

Bridges to Watch

Busiest Poor-Condition BridgeUS 67 over Henderson CR — 2,400 vehicles/day Oldest Listed BridgeTr 278 over Camp Creek — built in 1900 All County BridgesBrowse every bridge record in Mercer County.

Top Bridges to Watch in Mercer County

Bridge	Reason	Condition	Daily Traffic	Year Built
Fas 1405-ch 12 over Pope Creek	Poor condition + traffic exposure	Poor	50	1971
US 67 over Henderson CR	Poor condition + traffic exposure	Poor	2,400	1931
Fas 209-ch 14 over Eliza Creek N.	Poor condition + traffic exposure	Poor	1,150	1978
Fas 206-ch 4 over Parker Run	Poor condition + traffic exposure	Poor	775	1976
4th ST over Pope Creek	Poor condition + traffic exposure	Poor	650	1989
Fas 222-ch 22 over Toms Creek	Poor condition + traffic exposure	Poor	450	1976
Tr 53 over Camp Creek	Poor condition + traffic exposure	Poor	175	1969
Fas 214-ch 13 over Douglas Creek	Poor condition + traffic exposure	Poor	75	1942
Tr 183a over Pope Creek	Poor condition + traffic exposure	Poor	75	1964
Fas 214-ch 13 over Camp Creek	Poor condition + traffic exposure	Poor	75	1973

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.