US Bridges

4th St. over Over RR

Poor

Woodbury County, Iowa · 000000000 · Structure no. 000000000010491

Built
1984
41 years old
Condition
Poor
inspected April 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
255 ft
4 main spans
Daily traffic
6,031
2021 count
Owner
City
City or Municipal Highway Agency

About this bridge

4th St. over Over RR is a steel continuous stringer/multi-beam or girder carrying 4th St. over Over RR in Woodbury County, Iowa. It was built in 1984, so it is 41 years old, younger than the Iowa average of 45.5 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 6,031 vehicles a day, roughly 11% of them trucks, projected to reach 6,031 by 2043. The structure is 255 ft (77.7 m) long and 60 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
Carries4th St.
CrossesOver RR
Location000000000
RouteCity Street 0
CountyWoodbury County
StateIowa
Coordinates42.49426, -96.39249
Functional classUrban Minor Arterial

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating79.1 US tons
Inventory rating47.4 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length255 ft (77.7 m)
Longest span66 ft (20.1 m)
Deck width60 ft (18.3 m)
Roadway width52 ft (15.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,031 (2021)
Projected traffic6,031 by 2043
Trucks11%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesRailroad
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedOther structural work, including hydraulic replacements
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was 4th St. over Over RR built?

It was built in 1984, making it 41 years old in 2025.

What condition is 4th St. over Over RR in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in April 2023.

How much traffic does 4th St. over Over RR carry?

About 6,031 vehicles per day (2021 count), of which roughly 11% are trucks.

How long is 4th St. over Over RR?

The structure is 255 ft (77.7 m) long with a longest span of 66 ft (20.1 m) and a deck 60 ft wide.

Who owns 4th St. over Over RR?

It is owned by the City or Municipal Highway Agency.