DeKalb County Bridge Report Card

DeKalb County scores 83 out of 100 on BridgeLookup's Bridge Condition Exposure Score, based on FHWA National Bridge Inventory records.

B83 / 100

Local infrastructure snapshot

DeKalb County, Missouri

DeKalb County has 238 bridges in the National Bridge Inventory, with 16 rated poor and 4 rated scour-critical. Its poor-condition share of 6.7% is at or below the 8.8% statewide average. Poor-condition bridges carry about 340 daily vehicle crossings.

238Total Bridges

16Poor (6.7%)

144Fair (60.5%)

4Scour-Critical

Quote-Ready Local Facts

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

340daily vehicle crossings are on poor-condition bridges in the county.

4bridges are rated scour-critical, or 1.7% of the county bridge inventory.

Copyable Facts for Reporters

BridgeLookup.com gives DeKalb County a Bridge Condition Exposure Score of 83/100 (B). The county has 238 bridges in the National Bridge Inventory, including 16 in poor condition and 4 rated scour-critical. Poor-condition bridges carry about 340 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	6.7%	13.4
Poor-condition traffic exposure	25	0.2% of measured traffic	0.2
Scour-critical bridge share	20	1.7%	3.4
Average age vs national baseline	10	40 years vs 48 nationally	0.0
Traffic-data completeness	5	148,806 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	6.7%
State Poor-Condition Share	8.8%
National Poor-Condition Share	6.7%
County Scour-Critical Share	1.7%
Average Bridge Age	40 years
Poor-Condition Traffic Exposure	340 vehicles/day

Bridges to Watch

Busiest Poor-Condition BridgeSE Frost RD over Wheeler CR — 50 vehicles/day Oldest Listed BridgeNW Main RD over Lost CR — built in 1910 All County BridgesBrowse every bridge record in DeKalb County.

Top Bridges to Watch in DeKalb County

Bridge	Reason	Condition	Daily Traffic	Year Built
Water Street over Br Of Lost CR	Poor condition + traffic exposure	Poor	50	1933
SE Frost RD over Wheeler CR	Poor condition + traffic exposure	Poor	50	1995
SE Gridley RD over Br Of Wheeler CR	Poor condition + traffic exposure	Poor	35	1930
NW Polk RD over Trib Third Fk Plat	Poor condition + traffic exposure	Poor	35	1983
NW Glenwood RD over 3rd Fk Of Platte R	Poor condition + traffic exposure	Poor	35	1989
NE Heimbaugh RD over Irvins Br	Poor condition + traffic exposure	Poor	25	2002
NW Gospel RD over Crooked CR	Poor condition + traffic exposure	Poor	20	1930
SW Ketchem RD over Third Fk Platte Rv	Poor condition + traffic exposure	Poor	20	1990
NW Waldo RD over Trib To Third Fk	Poor condition + traffic exposure	Poor	15	2001
SW Orchard RD over Br Of Lit Third Fk	Poor condition + traffic exposure	Poor	15	2004

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.