Platte County Bridge Report Card

Platte County scores 71 out of 100 on BridgeLookup's Bridge Condition Exposure Score, based on FHWA National Bridge Inventory records.

C71 / 100

Local infrastructure snapshot

Platte County, Wyoming

Platte County has 159 bridges in the National Bridge Inventory, with 15 rated poor and 2 rated scour-critical. Its poor-condition share of 9.4% is above the 7.1% statewide average. Poor-condition bridges carry about 19,808 daily vehicle crossings.

159Total Bridges

15Poor (9.4%)

94Fair (59.1%)

2Scour-Critical

Quote-Ready Local Facts

9.4%of county bridges are in poor condition, compared with 7.1% statewide and 6.7% nationally.

19,808daily vehicle crossings are on poor-condition bridges in the county.

2bridges are rated scour-critical, or 1.3% of the county bridge inventory.

Copyable Facts for Reporters

BridgeLookup.com gives Platte County a Bridge Condition Exposure Score of 71/100 (C). The county has 159 bridges in the National Bridge Inventory, including 15 in poor condition and 2 rated scour-critical. Poor-condition bridges carry about 19,808 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	9.4%	18.9
Poor-condition traffic exposure	25	6.2% of measured traffic	4.7
Scour-critical bridge share	20	1.3%	2.5
Average age vs national baseline	10	55 years vs 48 nationally	2.8
Traffic-data completeness	5	318,307 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	9.4%
State Poor-Condition Share	7.1%
National Poor-Condition Share	6.7%
County Scour-Critical Share	1.3%
Average Bridge Age	55 years
Poor-Condition Traffic Exposure	19,808 vehicles/day

Bridges to Watch

Busiest Poor-Condition BridgeI-25 Nbl over Machinery Pass — 3,743 vehicles/day Oldest Listed BridgeWyo 319 over Middle Fork Bear Creek — built in 1922 All County BridgesBrowse every bridge record in Platte County.

Top Bridges to Watch in Platte County

Bridge	Reason	Condition	Daily Traffic	Year Built
I-25 Nbl over Machinery Pass	Poor condition + traffic exposure	Poor	3,743	1966
I-25 Sbl over North Laramie River	Poor condition + traffic exposure	Poor	3,568	1966
I-25 Nbl over Machinery Pass	Poor condition + traffic exposure	Poor	3,563	1972
I-25 Sbl over Richeau Creek	Poor condition + traffic exposure	Poor	3,350	1958
I-25 Sbl over N Antelope Creek RD	Poor condition + traffic exposure	Poor	3,350	1958
Cole Street over Rock / Wheatland Creek	Poor condition + traffic exposure	Poor	979	1979
Pl Cnty RD 275 over Rock / Wheatland Creek	Poor condition + traffic exposure	Poor	371	1975
I-25 Service Road over Rock Creek	Poor condition + traffic exposure	Poor	153	1948
10th Street over Canal No 2	Poor condition + traffic exposure	Poor	138	1930
E Hunton Creek RD over I-25	Poor condition + traffic exposure	Poor	138	1958

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.