US Bridges

WB Coll Ia 100 over Over Cc RR & Bike Trail

Fair

Linn County, Iowa · 0.1 Mi. N of Jct. Ia #100 · Structure no. 000000000604805

Built
1982
43 years old
Condition
Fair
inspected February 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
174 ft
3 main spans
Daily traffic
10,300
2022 count
Owner
State
State Highway Agency

About this bridge

WB Coll Ia 100 over Over Cc RR & Bike Trail is a steel continuous stringer/multi-beam or girder carrying WB Coll Ia 100 over Over Cc RR & Bike Trail in Linn County, Iowa. It was built in 1982, so it is 43 years old, younger 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 6 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 10,300 vehicles a day, roughly 3% of them trucks, projected to reach 10,300 by 2042. The structure is 174 ft (53 m) long and 46 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesWB Coll Ia 100
CrossesOver Cc RR & Bike Trail
Location0.1 Mi. N of Jct. Ia #100
RouteState Highway 100
CountyLinn County
StateIowa
Coordinates42.02864, -91.67173
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionFebruary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment7: Better than present minimum criteria
Operating rating75.8 US tons
Inventory rating45.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length174 ft (53 m)
Longest span65 ft (19.8 m)
Deck width46 ft (14.1 m)
Roadway width43 ft (13.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10,300 (2022)
Projected traffic10,300 by 2042
Trucks3%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesRailroad
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 WB Coll Ia 100 over Over Cc RR & Bike Trail built?

It was built in 1982, making it 43 years old in 2025.

What condition is WB Coll Ia 100 over Over Cc RR & Bike Trail 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 February 2023.

How much traffic does WB Coll Ia 100 over Over Cc RR & Bike Trail carry?

About 10,300 vehicles per day (2022 count), of which roughly 3% are trucks.

How long is WB Coll Ia 100 over Over Cc RR & Bike Trail?

The structure is 174 ft (53 m) long with a longest span of 65 ft (19.8 m) and a deck 46 ft wide.

Who owns WB Coll Ia 100 over Over Cc RR & Bike Trail?

It is owned by the State Highway Agency.