US Bridges

Harpen St. over Creek

Fair

Dickinson County, Iowa · I73000500 · Structure no. 000000000011601

Built
1998
27 years old
Condition
Fair
inspected April 2023
Type
Culvert
Concrete
Length
20 ft
1 main span
Daily traffic
535
2021 count
Owner
City
City or Municipal Highway Agency

About this bridge

Harpen St. over Creek is a concrete culvert carrying Harpen St. over Creek in Dickinson County, Iowa. It was built in 1998, so it is 27 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 535 vehicles a day, projected to reach 535 by 2043. The structure is 20 ft (6.1 m) long and 40 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesHarpen St.
CrossesCreek
LocationI73000500
RouteCity Street 0
CountyDickinson County
StateIowa
Coordinates43.36783, -95.16897
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
Channel and channel protection7 GoodSome minor problems.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating47.4 US tons
Inventory rating38.6 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans1
Design loadHS 20
Structure length20 ft (6.1 m)
Longest span20 ft (6.1 m)
Deck width40 ft (12.2 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic535 (2021)
Projected traffic535 by 2043
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed5 mi (8 km)
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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Harpen St. over Creek built?

It was built in 1998, making it 27 years old in 2025.

What condition is Harpen St. over Creek 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 April 2023.

How much traffic does Harpen St. over Creek carry?

About 535 vehicles per day (2021 count).

How long is Harpen St. over Creek?

The structure is 20 ft (6.1 m) long with a longest span of 20 ft (6.1 m) and a deck 40 ft wide.

Who owns Harpen St. over Creek?

It is owned by the City or Municipal Highway Agency.