US Bridges

US 30 over Rocky Run

Good

Crawford County, Iowa · 4.5 Mi. W. of Co. Rd. M55 · Structure no. 000000000021371

Built
2023
2 years old
Condition
Good
inspected February 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
103 ft
1 main span
Daily traffic
4,080
2023 count
Owner
State
State Highway Agency

About this bridge

US 30 over Rocky Run is a prestressed concrete stringer/multi-beam or girder carrying US 30 over Rocky Run in Crawford 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 4,080 vehicles a day, roughly 19% of them trucks, projected to reach 4,080 by 2043. The structure is 103 ft (31.4 m) long and 47 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesUS 30
CrossesRocky Run
Location4.5 Mi. W. of Co. Rd. M55
RouteU.S. Route 30
CountyCrawford County
StateIowa
Coordinates42.02813, -95.27545
Functional classRural Principal Arterial - Other

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.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy9: Superior to present desirable 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
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHL 93
Structure length103 ft (31.4 m)
Longest span100 ft (30.5 m)
Deck width47 ft (14.4 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,080 (2023)
Projected traffic4,080 by 2043
Trucks19%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes

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 US 30 over Rocky Run built?

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

What condition is US 30 over Rocky Run 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 US 30 over Rocky Run carry?

About 4,080 vehicles per day (2023 count), of which roughly 19% are trucks.

How long is US 30 over Rocky Run?

The structure is 103 ft (31.4 m) long with a longest span of 100 ft (30.5 m) and a deck 47 ft wide.

Who owns US 30 over Rocky Run?

It is owned by the State Highway Agency.