US Bridges

Ia 148 over Elm Creek

Fair

Cass County, Iowa · 2.7 Mi. S of Jct. Ia 92 · Structure no. 000000000017880

Built
1959
66 years old
Condition
Fair
inspected September 2024
Type
Culvert
Concrete Continuous
Length
29 ft
2 main spans
Daily traffic
770
2022 count
Owner
State
State Highway Agency

About this bridge

Ia 148 over Elm Creek is a concrete continuous culvert carrying Ia 148 over Elm Creek in Cass County, Iowa. It was built in 1959, so it is 66 years old, older than the Iowa average of 45.5 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 770 vehicles a day, roughly 23% of them trucks, projected to reach 770 by 2044. The structure is 29 ft (8.8 m) long. If it were closed, the detour would be 9.9 mi (16 km).

Location

Open in Google Maps
CarriesIa 148
CrossesElm Creek
Location2.7 Mi. S of Jct. Ia 92
RouteState Highway 148
CountyCass County
StateIowa
Coordinates41.21963, -94.75776
Functional classRural Minor Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating27 US tons
Inventory rating20 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadH 20
Structure length29 ft (8.8 m)
Longest span14 ft (4.3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic770 (2022)
Projected traffic770 by 2044
Trucks23%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.9 mi (16 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—
NavigationNo navigation control on waterway

Frequently asked questions

When was Ia 148 over Elm Creek built?

It was built in 1959, making it 66 years old in 2025.

What condition is Ia 148 over Elm Creek in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in September 2024.

How much traffic does Ia 148 over Elm Creek carry?

About 770 vehicles per day (2022 count), of which roughly 23% are trucks.

How long is Ia 148 over Elm Creek?

The structure is 29 ft (8.8 m) long with a longest span of 14 ft (4.3 m).

Who owns Ia 148 over Elm Creek?

It is owned by the State Highway Agency.