US Bridges

Dodge ST over Over Iais RR

Poor

Johnson County, Iowa · 079061500 · Structure no. 000000000006470

Built
1970
55 years old
Condition
Poor
inspected July 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
194 ft
3 main spans
Daily traffic
4,688
2022 count
Owner
City
City or Municipal Highway Agency

About this bridge

Dodge ST over Over Iais RR is a steel continuous stringer/multi-beam or girder carrying Dodge ST over Over Iais RR in Johnson County, Iowa. It was built in 1970, so it is 55 years old, older 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 4,688 vehicles a day, projected to reach 4,688 by 2043. The structure is 194 ft (59.1 m) long and 64 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesDodge ST
CrossesOver Iais RR
Location079061500
RouteCity Street 0
CountyJohnson County
StateIowa
Coordinates41.65187, -91.52603
Functional classUrban Local

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
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating48.6 US tons
Inventory rating36 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length194 ft (59.1 m)
Longest span108 ft (32.9 m)
Deck width64 ft (19.6 m)
Roadway width52 ft (15.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,688 (2022)
Projected traffic4,688 by 2043
Trucks0%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$210,000
NavigationNot applicable (no waterway)

Frequently asked questions

When was Dodge ST over Over Iais RR built?

It was built in 1970, making it 55 years old in 2025.

What condition is Dodge ST over Over Iais 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 July 2023.

How much traffic does Dodge ST over Over Iais RR carry?

About 4,688 vehicles per day (2022 count).

How long is Dodge ST over Over Iais RR?

The structure is 194 ft (59.1 m) long with a longest span of 108 ft (32.9 m) and a deck 64 ft wide.

Who owns Dodge ST over Over Iais RR?

It is owned by the City or Municipal Highway Agency.