Summit County Bridge Report Card

Summit County scores 69 out of 100 on BridgeLookup's Bridge Condition Exposure Score, based on FHWA National Bridge Inventory records.

D69 / 100

Local infrastructure snapshot

Summit County, Utah

Summit County has 137 bridges in the National Bridge Inventory, with 13 rated poor and 7 rated scour-critical. Its poor-condition share of 9.5% is above the 3.5% statewide average. Poor-condition bridges carry about 27,628 daily vehicle crossings.

137Total Bridges

13Poor (9.5%)

108Fair (78.8%)

7Scour-Critical

Quote-Ready Local Facts

9.5%of county bridges are in poor condition, compared with 3.5% statewide and 6.7% nationally.

27,628daily vehicle crossings are on poor-condition bridges in the county.

7bridges are rated scour-critical, or 5.1% of the county bridge inventory.

Copyable Facts for Reporters

BridgeLookup.com gives Summit County a Bridge Condition Exposure Score of 69/100 (D). The county has 137 bridges in the National Bridge Inventory, including 13 in poor condition and 7 rated scour-critical. Poor-condition bridges carry about 27,628 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	9.5%	19.0
Poor-condition traffic exposure	25	2.4% of measured traffic	1.8
Scour-critical bridge share	20	5.1%	10.2
Average age vs national baseline	10	43 years vs 48 nationally	0.0
Traffic-data completeness	5	1,147,925 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	9.5%
State Poor-Condition Share	3.5%
National Poor-Condition Share	6.7%
County Scour-Critical Share	5.1%
Average Bridge Age	43 years
Poor-Condition Traffic Exposure	27,628 vehicles/day

Bridges to Watch

Busiest Poor-Condition BridgeI-80 (sr-80) over Echo Creek — 14,685 vehicles/day Oldest Listed BridgeCounty Road over Echo Creek — built in 1924 All County BridgesBrowse every bridge record in Summit County.

Top Bridges to Watch in Summit County

Bridge	Reason	Condition	Daily Traffic	Year Built
County Road over Smith And Morehouse CR	Poor condition + traffic exposure	Poor	914	1996
County Road over Weber River	Poor condition + traffic exposure	Poor	252	1970
County Road over Weber-provo Div. Canal	Poor condition + traffic exposure	Poor	233	1960
Co.rd. F# 2600 over Smith-moorehouse Ck.	Poor condition + traffic exposure	Poor	100	1950
I-80 (sr-80) over Echo Creek	Poor condition + traffic exposure	Poor	14,685	1967
I-80 (sr-80) Wbl over Weber River	Poor condition + traffic exposure	Poor	6,011	2012
Sr-32 over Silver Creek	Poor condition + traffic exposure	Poor	2,990	1980
Sr-32 over Weber River	Poor condition + traffic exposure	Poor	1,660	1955
Judd Lane-co. Rd. over Weber River	Poor condition + traffic exposure	Poor	252	1995
Sr-302 over Weber River	Poor condition + traffic exposure	Poor	240	2009

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.