US Bridges

Roberts RD over Wilbur Drain

FairPosted for load

Allen County, Indiana · 00.30 S Darling Road · Structure no. 0200070

Built
1969
56 years old
Condition
Fair
inspected May 2024
Type
Slab
Concrete
Length
33 ft
1 main span
Daily traffic
260
2018 count
Owner
County
County Highway Agency

About this bridge

Roberts RD over Wilbur Drain is a concrete slab carrying Roberts RD over Wilbur Drain in Allen County, Indiana. It was built in 1969, so it is 56 years old, older than the Indiana average of 46.6 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. Its operating status is: posted for load restriction.

It carries about 260 vehicles a day, roughly 5% of them trucks, projected to reach 389 by 2038. The structure is 33 ft (10 m) long and 28 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesRoberts RD
CrossesWilbur Drain
Location00.30 S Darling Road
RouteCounty Highway 357
StateIndiana
Coordinates41.1694, -84.92217
Functional classRural Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation3: Basically intolerable, requiring high priority of corrective action
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating12.1 US tons
Inventory rating7.2 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length33 ft (10 m)
Longest span30 ft (9.1 m)
Deck width28 ft (8.5 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic260 (2018)
Projected traffic389 by 2038
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Roberts RD over Wilbur Drain built?

It was built in 1969, making it 56 years old in 2025.

What condition is Roberts RD over Wilbur Drain 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 May 2024.

How much traffic does Roberts RD over Wilbur Drain carry?

About 260 vehicles per day (2018 count), of which roughly 5% are trucks.

How long is Roberts RD over Wilbur Drain?

The structure is 33 ft (10 m) long with a longest span of 30 ft (9.1 m) and a deck 28 ft wide.

Who owns Roberts RD over Wilbur Drain?

It is owned by the County Highway Agency.