US Bridges

Ia 100 EB over US 30WB/US 218NB on Ramp

Good

Linn County, Iowa · US 30 Ramp D · Structure no. 000000000700585

Built
2018
7 years old
Condition
Good
inspected March 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
404 ft
3 main spans
Daily traffic
950
2022 count
Owner
State
State Highway Agency

About this bridge

Ia 100 EB over US 30WB/US 218NB on Ramp is a steel continuous stringer/multi-beam or girder carrying Ia 100 EB over US 30WB/US 218NB on Ramp in Linn County, Iowa. It was built in 2018, so it is 7 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 950 vehicles a day, roughly 5% of them trucks, projected to reach 950 by 2044. The structure is 404 ft (123.1 m) long and 33 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesIa 100 EB
CrossesUS 30WB/US 218NB on Ramp
LocationUS 30 Ramp D
RouteState Highway 100
CountyLinn County
StateIowa
Coordinates41.95963, -91.77649
Functional classUrban Other Principal 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 inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation8: Equal to present desirable criteria
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating56.1 US tons
Inventory rating43.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHL 93
Structure length404 ft (123.1 m)
Longest span182 ft (55.5 m)
Deck width33 ft (10.1 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic950 (2022)
Projected traffic950 by 2044
Trucks5%
Lanes on structure1
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 Ia 100 EB over US 30WB/US 218NB on Ramp built?

It was built in 2018, making it 7 years old in 2025.

What condition is Ia 100 EB over US 30WB/US 218NB on Ramp 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 March 2024.

How much traffic does Ia 100 EB over US 30WB/US 218NB on Ramp carry?

About 950 vehicles per day (2022 count), of which roughly 5% are trucks.

How long is Ia 100 EB over US 30WB/US 218NB on Ramp?

The structure is 404 ft (123.1 m) long with a longest span of 182 ft (55.5 m) and a deck 33 ft wide.

Who owns Ia 100 EB over US 30WB/US 218NB on Ramp?

It is owned by the State Highway Agency.