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I129/US75 over Missouri River

Dakota County, Nebraska · rated Fair in the 2025 National Bridge Inventory

United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled

View this bridge on a map → (42.4471, -96.3803)

Component ratings

ComponentRating (2024)Rating (2025)FHWA scale meaning
Deck66Satisfactory condition
Superstructure55Fair condition
Substructure55Fair condition

Bridge details

StructureContinuous steel girder and floorbeam
Lengthabout 2,606 ft
LocationEcl South Sioux City
NBI structure numberS129 00321
Condition classFair
Traffic status (item 41)Open, no restriction
Last inspection (item 90)October 2023
Inspection interval (item 91)24 months
Scour (item 113)7: scour countermeasures installed
Fracture critical (item 92A)Yes

Source: FHWA National Bridge Inventory, 2025 data as reported by the Nebraska department of transportation.

Busiest bridges in Dakota County

BridgeBuiltVehicles/dayCondition
US77 over Missouri River198132,065Fair
I129/US75 over Crystal Lake197714,995Good
I129/US275 over Crystal Lake197714,995Good
I129/US75 over BNSF/UPRR/5TH197714,995Good
I129/US75 over BNSF/UPRR/5TH197714,995Good
I129/US75 over Dakota Ave197414,995Good

All bridges nearby: Dakota County, NE bridge conditions · every bridge in Dakota County · Nebraska bridges.

Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.