Sumner County Bridge Report Card

Sumner County scores 87 out of 100 on BridgeLookup's Bridge Condition Exposure Score, based on FHWA National Bridge Inventory records.

B87 / 100

Local infrastructure snapshot

Sumner County, Kansas

Sumner County has 658 bridges in the National Bridge Inventory, with 16 rated poor and 18 rated scour-critical. Its poor-condition share of 2.4% is at or below the 5.2% statewide average. Poor-condition bridges carry about 14,582 daily vehicle crossings.

658Total Bridges

16Poor (2.4%)

311Fair (47.3%)

18Scour-Critical

Quote-Ready Local Facts

2.4%of county bridges are in poor condition, compared with 5.2% statewide and 6.7% nationally.

14,582daily vehicle crossings are on poor-condition bridges in the county.

18bridges are rated scour-critical, or 2.7% of the county bridge inventory.

Copyable Facts for Reporters

BridgeLookup.com gives Sumner County a Bridge Condition Exposure Score of 87/100 (B). The county has 658 bridges in the National Bridge Inventory, including 16 in poor condition and 18 rated scour-critical. Poor-condition bridges carry about 14,582 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	2.4%	4.9
Poor-condition traffic exposure	25	3.0% of measured traffic	2.2
Scour-critical bridge share	20	2.7%	5.5
Average age vs national baseline	10	47 years vs 48 nationally	0.0
Traffic-data completeness	5	489,368 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	2.4%
State Poor-Condition Share	5.2%
National Poor-Condition Share	6.7%
County Scour-Critical Share	2.7%
Average Bridge Age	47 years
Poor-Condition Traffic Exposure	14,582 vehicles/day

Bridges to Watch

Busiest Poor-Condition BridgeI-35 HWY NB (kta) over Local Road — 9,503 vehicles/day Oldest Listed BridgeS. Ryan RD Rs 788 over Trib. To Fall Creek — built in 1900 All County BridgesBrowse every bridge record in Sumner County.

Top Bridges to Watch in Sumner County

Bridge	Reason	Condition	Daily Traffic	Year Built
Us81 HWY over Bluff Creek	Poor condition + traffic exposure	Poor	826	1924
Local 60.5-35-7 over Chikaskia River	Poor condition + traffic exposure	Poor	20	1930
I-35 HWY NB (kta) over Local Road	Poor condition + traffic exposure	Poor	9,503	1956
Rs 644 59-6-8 over Trib. To Cowskin Creek	Poor condition + traffic exposure	Poor	2,815	1986
K55 HWY over Arkansas River Drainage	Poor condition + traffic exposure	Poor	836	1933
Rs 643 E 50th N over At & Sf Railroad	Poor condition + traffic exposure	Poor	135	1967
Rs0643 over I-35 HWY (kta)	Poor condition + traffic exposure	Poor	122	1956
W. 20th ST S. over Trib. To Chikaskia River	Poor condition + traffic exposure	Poor	100	1930
Local 26-47-1 over Hargis Creek	Poor condition + traffic exposure	Poor	75	1974
Local 32-39-9 over C. R.i.&p. R.r.	Poor condition + traffic exposure	Poor	50	1920

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.