US Bridges

Fremont ST over Rock Run

Fair

Hardin County, Iowa · 000000000 · Structure no. 000000000006620

Built
1940
85 years old
Condition
Fair
inspected May 2024
Type
Slab
Concrete Continuous
Length
40 ft
3 main spans
Daily traffic
424
2022 count
Owner
City
City or Municipal Highway Agency

About this bridge

Fremont ST over Rock Run is a concrete continuous slab carrying Fremont ST over Rock Run in Hardin County, Iowa. It was built in 1940, so it is 85 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 5 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 424 vehicles a day, projected to reach 424 by 2044. The structure is 40 ft (12.2 m) long and 24 ft wide.

Location

Open in Google Maps
CarriesFremont ST
CrossesRock Run
Location000000000
RouteCity Street 0
CountyHardin County
StateIowa
Coordinates42.52614, -93.26105
Functional classUrban Local

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment4: Meets minimum tolerable limits to be left in place as is
Operating rating20.2 US tons
Inventory rating15 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadUnknown
Structure length40 ft (12.2 m)
Longest span22 ft (6.7 m)
Deck width24 ft (7.4 m)
Roadway width20 ft (6.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic424 (2022)
Projected traffic424 by 2044
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusPossibly eligible for the National Register; requires further investigation
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$118,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Fremont ST over Rock Run built?

It was built in 1940, making it 85 years old in 2025.

What condition is Fremont ST over Rock Run 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 May 2024.

How much traffic does Fremont ST over Rock Run carry?

About 424 vehicles per day (2022 count).

How long is Fremont ST over Rock Run?

The structure is 40 ft (12.2 m) long with a longest span of 22 ft (6.7 m) and a deck 24 ft wide.

Who owns Fremont ST over Rock Run?

It is owned by the City or Municipal Highway Agency.