US Bridges

Local RD over Cleghorn Dd

Good

Monona County, Iowa · 083450703 · Structure no. 000000000250285

Built
2002
23 years old
Condition
Good
inspected May 2023
Type
Arch - Deck
Concrete
Length
34 ft
1 main span
Daily traffic
319
2021 count
Owner
County
County Highway Agency

About this bridge

Local RD over Cleghorn Dd is a concrete arch - deck carrying Local RD over Cleghorn Dd in Monona County, Iowa. It was built in 2002, so it is 23 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 319 vehicles a day, projected to reach 319 by 2043. The structure is 34 ft (10.4 m) long and 30 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesLocal RD
CrossesCleghorn Dd
Location083450703
RouteCounty Highway 0
CountyMonona County
StateIowa
Coordinates42.02339, -96.12166
Functional classRural Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating110.1 US tons
Inventory rating69.3 US tons

Structure

Structure typeArch - Deck
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length34 ft (10.4 m)
Longest span34 ft (10.4 m)
Deck width30 ft (9.1 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic319 (2021)
Projected traffic319 by 2043
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusPossibly eligible for the National Register; requires further investigation
Work proposedOther structural work, including hydraulic replacements
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Local RD over Cleghorn Dd built?

It was built in 2002, making it 23 years old in 2025.

What condition is Local RD over Cleghorn Dd 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 May 2023.

How much traffic does Local RD over Cleghorn Dd carry?

About 319 vehicles per day (2021 count).

How long is Local RD over Cleghorn Dd?

The structure is 34 ft (10.4 m) long with a longest span of 34 ft (10.4 m) and a deck 30 ft wide.

Who owns Local RD over Cleghorn Dd?

It is owned by the County Highway Agency.