US Bridges

Pierce ST over Rock Run

Fair

Hardin County, Iowa · 000000000 · Structure no. 000000000006590

Built
1980
45 years old
Condition
Fair
inspected May 2024
Type
Culvert
Steel
Length
30 ft
1 main span
Daily traffic
672
2022 count
Owner
City
City or Municipal Highway Agency

About this bridge

Pierce ST over Rock Run is a steel culvert carrying Pierce ST over Rock Run in Hardin County, Iowa. It was built in 1980, so it is 45 years old, younger 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 672 vehicles a day, projected to reach 672 by 2044. The structure is 30 ft (9.1 m) long.

CarriesPierce ST
CrossesRock Run
Location000000000
RouteCity Street 0
StateIowa
Coordinates42.52501, -93.26086
Functional classUrban Collector

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 protection7 GoodSome minor problems.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating48.6 US tons
Inventory rating36 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans1
Design loadUnknown
Structure length30 ft (9.1 m)
Longest span30 ft (9.1 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic672 (2022)
Projected traffic672 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$105,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Pierce ST over Rock Run built?

It was built in 1980, making it 45 years old in 2025.

What condition is Pierce 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 Pierce ST over Rock Run carry?

About 672 vehicles per day (2022 count).

How long is Pierce ST over Rock Run?

The structure is 30 ft (9.1 m) long with a longest span of 30 ft (9.1 m).

Who owns Pierce ST over Rock Run?

It is owned by the City or Municipal Highway Agency.