US Bridges

Covington RD over Ia 100

Good

Linn County, Iowa · JCT Covington RD & Ia 100 · Structure no. 000000000700430

Built
2015
10 years old
Condition
Good
inspected September 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
235 ft
2 main spans
Daily traffic
4,910
2022 count
Owner
State
State Highway Agency

About this bridge

Covington RD over Ia 100 is a prestressed concrete stringer/multi-beam or girder carrying Covington RD over Ia 100 in Linn County, Iowa. It was built in 2015, so it is 10 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 4,910 vehicles a day, projected to reach 4,910 by 2043. The structure is 235 ft (71.6 m) long and 73 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

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CarriesCovington RD
CrossesIa 100
LocationJCT Covington RD & Ia 100
RouteCounty Highway 0
CountyLinn County
StateIowa
Coordinates42.01179, -91.76598
Functional classUrban Minor Arterial

Condition and inspection

Good

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation8: Equal to present desirable criteria
Deck geometry9: 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 spans2
Design loadHL 93
Structure length235 ft (71.6 m)
Longest span116 ft (35.4 m)
Deck width73 ft (22.3 m)
Roadway width70 ft (21.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,910 (2022)
Projected traffic4,910 by 2043
Trucks0%
Lanes on structure3
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed6.2 mi (10 km)
TollOn a free road
National Highway SystemNo

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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Covington RD over Ia 100 built?

It was built in 2015, making it 10 years old in 2025.

What condition is Covington RD over Ia 100 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 September 2023.

How much traffic does Covington RD over Ia 100 carry?

About 4,910 vehicles per day (2022 count).

How long is Covington RD over Ia 100?

The structure is 235 ft (71.6 m) long with a longest span of 116 ft (35.4 m) and a deck 73 ft wide.

Who owns Covington RD over Ia 100?

It is owned by the State Highway Agency.