US Bridges

Ia 48 over Morman Branch Creek

Good

Montgomery County, Iowa · 3.8 Mi. S of U.S. 34 · Structure no. 000000000037691

Built
1987
38 years old
Condition
Good
inspected March 2023
Type
Culvert
Concrete Continuous
Length
29 ft
2 main spans
Daily traffic
2,000
2022 count
Owner
State
State Highway Agency

About this bridge

Ia 48 over Morman Branch Creek is a concrete continuous culvert carrying Ia 48 over Morman Branch Creek in Montgomery County, Iowa. It was built in 1987, so it is 38 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 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 2,000 vehicles a day, roughly 18% of them trucks, projected to reach 2,000 by 2043. The structure is 29 ft (8.8 m) long. If it were closed, the detour would be 11.8 mi (19 km).

Location

Open in Google Maps
CarriesIa 48
CrossesMorman Branch Creek
Location3.8 Mi. S of U.S. 34
RouteState Highway 48
CountyMontgomery County
StateIowa
Coordinates40.9707, -95.23338
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
Channel and channel protection7 GoodSome minor problems.
Culvert7 GoodSome minor problems.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating96.2 US tons
Inventory rating57.5 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadHS 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 traffic2,000 (2022)
Projected traffic2,000 by 2043
Trucks18%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed11.8 mi (19 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 48 over Morman Branch Creek built?

It was built in 1987, making it 38 years old in 2025.

What condition is Ia 48 over Morman Branch Creek 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 March 2023.

How much traffic does Ia 48 over Morman Branch Creek carry?

About 2,000 vehicles per day (2022 count), of which roughly 18% are trucks.

How long is Ia 48 over Morman Branch Creek?

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

Who owns Ia 48 over Morman Branch Creek?

It is owned by the State Highway Agency.