US Bridges

Marsh Ave over US 30

Good

Marshall County, Iowa · 1.1 Mi. E of Jct. Ia 330 · Structure no. 000000000601500

Built
1995
30 years old
Condition
Good
inspected October 2021
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
268 ft
4 main spans
Daily traffic
128
2022 count
Owner
State
State Highway Agency

About this bridge

Marsh Ave over US 30 is a prestressed concrete stringer/multi-beam or girder carrying Marsh Ave over US 30 in Marshall County, Iowa. It was built in 1995, so it is 30 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 128 vehicles a day, roughly 13% of them trucks, projected to reach 128 by 2042. The structure is 268 ft (81.7 m) long and 33 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

Location

Open in Google Maps
CarriesMarsh Ave
CrossesUS 30
Location1.1 Mi. E of Jct. Ia 330
RouteCounty Highway 0
CountyMarshall County
StateIowa
Coordinates42.00726, -92.99986
Functional classRural Minor Collector

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.
Substructure7 GoodSome minor problems.
Last inspectionOctober 2021
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating91.9 US tons
Inventory rating45.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length268 ft (81.7 m)
Longest span97 ft (29.6 m)
Deck width33 ft (10.1 m)
Roadway width30 ft (9.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic128 (2022)
Projected traffic128 by 2042
Trucks13%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Marsh Ave over US 30 built?

It was built in 1995, making it 30 years old in 2025.

What condition is Marsh Ave over US 30 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 October 2021.

How much traffic does Marsh Ave over US 30 carry?

About 128 vehicles per day (2022 count), of which roughly 13% are trucks.

How long is Marsh Ave over US 30?

The structure is 268 ft (81.7 m) long with a longest span of 97 ft (29.6 m) and a deck 33 ft wide.

Who owns Marsh Ave over US 30?

It is owned by the State Highway Agency.