US Bridges

W 8th ST N over Iais RR

Good

Jasper County, Iowa · 000000000 · Structure no. 000000000008641

Built
1981
44 years old
Condition
Good
inspected August 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
151 ft
3 main spans
Daily traffic
3,444
2022 count
Owner
City
City or Municipal Highway Agency

About this bridge

W 8th ST N over Iais RR is a prestressed concrete stringer/multi-beam or girder carrying W 8th ST N over Iais RR in Jasper County, Iowa. It was built in 1981, so it is 44 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 3,444 vehicles a day, projected to reach 3,444 by 2043. The structure is 151 ft (46 m) long and 39 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesW 8th ST N
CrossesIais RR
Location000000000
RouteCity Street 0
CountyJasper County
StateIowa
Coordinates41.70149, -93.06283
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.
Substructure7 GoodSome minor problems.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment4: Meets minimum tolerable limits to be left in place as is
Operating rating52.5 US tons
Inventory rating31.4 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length151 ft (46 m)
Longest span61 ft (18.6 m)
Deck width39 ft (11.9 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,444 (2022)
Projected traffic3,444 by 2043
Trucks0%
Lanes on structure2
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 proposedOther structural work, including hydraulic replacements
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was W 8th ST N over Iais RR built?

It was built in 1981, making it 44 years old in 2025.

What condition is W 8th ST N over Iais RR 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 August 2023.

How much traffic does W 8th ST N over Iais RR carry?

About 3,444 vehicles per day (2022 count).

How long is W 8th ST N over Iais RR?

The structure is 151 ft (46 m) long with a longest span of 61 ft (18.6 m) and a deck 39 ft wide.

Who owns W 8th ST N over Iais RR?

It is owned by the City or Municipal Highway Agency.