US Bridges

Ia 78 over Dme RR

Good

Keokuk County, Iowa · 8.8 Mi. E of Jct. Ia 149 · Structure no. 000000000032691

Built
2023
2 years old
Condition
Good
inspected February 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
476 ft
3 main spans
Daily traffic
1,590
2021 count
Owner
State
State Highway Agency

About this bridge

Ia 78 over Dme RR is a steel continuous stringer/multi-beam or girder carrying Ia 78 over Dme RR in Keokuk County, Iowa. It was built in 2023, so it is 2 years old, younger 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 1,590 vehicles a day, roughly 21% of them trucks, projected to reach 1,590 by 2044. The structure is 476 ft (145 m) long and 43 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

Location

Open in Google Maps
CarriesIa 78
CrossesDme RR
Location8.8 Mi. E of Jct. Ia 149
RouteState Highway 78
CountyKeokuk County
StateIowa
Coordinates41.17775, -92.04954
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
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation8: Equal to present desirable criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating46.4 US tons
Inventory rating35.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHL 93
Structure length476 ft (145 m)
Longest span200 ft (61 m)
Deck width43 ft (13.2 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,590 (2021)
Projected traffic1,590 by 2044
Trucks21%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesRailroad
Detour if closed8.1 mi (13 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 78 over Dme RR built?

It was built in 2023, making it 2 years old in 2025.

What condition is Ia 78 over Dme 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 February 2024.

How much traffic does Ia 78 over Dme RR carry?

About 1,590 vehicles per day (2021 count), of which roughly 21% are trucks.

How long is Ia 78 over Dme RR?

The structure is 476 ft (145 m) long with a longest span of 200 ft (61 m) and a deck 43 ft wide.

Who owns Ia 78 over Dme RR?

It is owned by the State Highway Agency.