Harrison County Bridge Report Card

Harrison County scores 42 out of 100 on BridgeLookup's Bridge Condition Exposure Score, based on FHWA National Bridge Inventory records.

F42 / 100

Local infrastructure snapshot

Harrison County, Missouri

Harrison County has 331 bridges in the National Bridge Inventory, with 74 rated poor and 23 rated scour-critical. Its poor-condition share of 22.4% is above the 8.8% statewide average. Poor-condition bridges carry about 10,338 daily vehicle crossings.

331Total Bridges

74Poor (22.4%)

126Fair (38.1%)

23Scour-Critical

Quote-Ready Local Facts

22.4%of county bridges are in poor condition, compared with 8.8% statewide and 6.7% nationally.

10,338daily vehicle crossings are on poor-condition bridges in the county.

23bridges are rated scour-critical, or 6.9% of the county bridge inventory.

Copyable Facts for Reporters

BridgeLookup.com gives Harrison County a Bridge Condition Exposure Score of 42/100 (F). The county has 331 bridges in the National Bridge Inventory, including 74 in poor condition and 23 rated scour-critical. Poor-condition bridges carry about 10,338 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	22.4%	40.0
Poor-condition traffic exposure	25	5.5% of measured traffic	4.1
Scour-critical bridge share	20	6.9%	13.9
Average age vs national baseline	10	44 years vs 48 nationally	0.0
Traffic-data completeness	5	189,029 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	22.4%
State Poor-Condition Share	8.8%
National Poor-Condition Share	6.7%
County Scour-Critical Share	6.9%
Average Bridge Age	44 years
Poor-Condition Traffic Exposure	10,338 vehicles/day

Bridges to Watch

Busiest Poor-Condition BridgeUS 136 E over Is 35 — 4,757 vehicles/day Oldest Listed BridgeE 165 ST over E Fk Big CR — built in 1910 All County BridgesBrowse every bridge record in Harrison County.

Top Bridges to Watch in Harrison County

Bridge	Reason	Condition	Daily Traffic	Year Built
E 165 ST over E Fk Big CR	Poor condition + traffic exposure	Poor	50	1910
E 280 AVE over Brush CR	Poor condition + traffic exposure	Poor	35	1910
E 300 AVE over Indian CR	Poor condition + traffic exposure	Poor	35	1920
W 120 AVE over Samson CR	Poor condition + traffic exposure	Poor	35	1920
E 205 ST over E Fk Big CR	Poor condition + traffic exposure	Poor	35	1972
E 225 ST over E Fk Big CR	Poor condition + traffic exposure	Poor	35	1985
E 333 AVE over Trib Of Sugar CR	Poor condition + traffic exposure	Poor	25	1992
W 290 ST over White Oak CR	Poor condition + traffic exposure	Poor	20	1936
E 340 ST over Sugar CR	Poor condition + traffic exposure	Poor	20	1977
W 110 AVE over Br Of Sampson CR	Poor condition + traffic exposure	Poor	15	1935

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.