US Bridges

EB US 20 over Sergeant Road

Fair

Woodbury County, Iowa · 2.1 Mi. W of Jct. Ia 12 · Structure no. 000000000603720

Built
1978
47 years old
Condition
Fair
inspected September 2022
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
161 ft
3 main spans
Daily traffic
14,000
2022 count
Owner
State
State Highway Agency

About this bridge

EB US 20 over Sergeant Road is a prestressed concrete stringer/multi-beam or girder carrying EB US 20 over Sergeant Road in Woodbury County, Iowa. It was built in 1978, so it is 47 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 14,000 vehicles a day, roughly 13% of them trucks, projected to reach 14,000 by 2042. The structure is 161 ft (49.1 m) long and 43 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesEB US 20
CrossesSergeant Road
Location2.1 Mi. W of Jct. Ia 12
RouteU.S. Route 20
CountyWoodbury County
StateIowa
Coordinates42.44686, -96.33652
Functional classUrban Other Principal Arterial

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionSeptember 2022
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating65.5 US tons
Inventory rating44.6 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length161 ft (49.1 m)
Longest span65 ft (19.8 m)
Deck width43 ft (13.2 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic14,000 (2022)
Projected traffic14,000 by 2042
Trucks13%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes

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 EB US 20 over Sergeant Road built?

It was built in 1978, making it 47 years old in 2025.

What condition is EB US 20 over Sergeant Road 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 September 2022.

How much traffic does EB US 20 over Sergeant Road carry?

About 14,000 vehicles per day (2022 count), of which roughly 13% are trucks.

How long is EB US 20 over Sergeant Road?

The structure is 161 ft (49.1 m) long with a longest span of 65 ft (19.8 m) and a deck 43 ft wide.

Who owns EB US 20 over Sergeant Road?

It is owned by the State Highway Agency.