US Bridges

Ia 148 over Over BNSF RR

Good

Adams County, Iowa · 0.6 Mi. N of Jct. Ia 34 · Structure no. 000000000013401

Built
1976
49 years old
Condition
Good
inspected January 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
196 ft
3 main spans
Daily traffic
3,580
2022 count
Owner
State
State Highway Agency

About this bridge

Ia 148 over Over BNSF RR is a prestressed concrete stringer/multi-beam or girder carrying Ia 148 over Over BNSF RR in Adams County, Iowa. It was built in 1976, so it is 49 years old, older than the Iowa average of 45.5 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 3,580 vehicles a day, roughly 12% of them trucks, projected to reach 3,580 by 2043. The structure is 196 ft (59.7 m) long and 41 ft wide. If it were closed, the detour would be 14.3 mi (23 km).

Location

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CarriesIa 148
CrossesOver BNSF RR
Location0.6 Mi. N of Jct. Ia 34
RouteState Highway 148
CountyAdams County
StateIowa
Coordinates40.98719, -94.73183
Functional classRural Minor Arterial

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Last inspectionJanuary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating79.1 US tons
Inventory rating32.6 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length196 ft (59.7 m)
Longest span65 ft (19.8 m)
Deck width41 ft (12.4 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,580 (2022)
Projected traffic3,580 by 2043
Trucks12%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesRailroad
Detour if closed14.3 mi (23 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Ia 148 over Over BNSF RR built?

It was built in 1976, making it 49 years old in 2025.

What condition is Ia 148 over Over BNSF RR in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in January 2023.

How much traffic does Ia 148 over Over BNSF RR carry?

About 3,580 vehicles per day (2022 count), of which roughly 12% are trucks.

How long is Ia 148 over Over BNSF RR?

The structure is 196 ft (59.7 m) long with a longest span of 65 ft (19.8 m) and a deck 41 ft wide.

Who owns Ia 148 over Over BNSF RR?

It is owned by the State Highway Agency.