US Bridges

Flatrock RD over Adam Schlemmer Baker Dra

Fair

Allen County, Indiana · 00.30 E Mcardle RD · Structure no. 0200220

Built
1973
52 years old
Condition
Fair
inspected May 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
27 ft
1 main span
Daily traffic
104
2018 count
Owner
County
County Highway Agency

About this bridge

Flatrock RD over Adam Schlemmer Baker Dra is a prestressed concrete box beam or girders - multiple carrying Flatrock RD over Adam Schlemmer Baker Dra in Allen County, Indiana. It was built in 1973, so it is 52 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.

It carries about 104 vehicles a day, roughly 5% of them trucks, projected to reach 156 by 2038. The structure is 27 ft (8.3 m) long and 32 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesFlatrock RD
CrossesAdam Schlemmer Baker Dra
Location00.30 E Mcardle RD
RouteCounty Highway 18
StateIndiana
Coordinates40.96456, -84.86775
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating71.4 US tons
Inventory rating42.8 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length27 ft (8.3 m)
Longest span24 ft (7.3 m)
Deck width32 ft (9.8 m)
Roadway width30 ft (9.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic104 (2018)
Projected traffic156 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 proposedOther structural work, including hydraulic replacements
Estimated improvement cost$50,000 (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Flatrock RD over Adam Schlemmer Baker Dra built?

It was built in 1973, making it 52 years old in 2025.

What condition is Flatrock RD over Adam Schlemmer Baker Dra 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 Flatrock RD over Adam Schlemmer Baker Dra carry?

About 104 vehicles per day (2018 count), of which roughly 5% are trucks.

How long is Flatrock RD over Adam Schlemmer Baker Dra?

The structure is 27 ft (8.3 m) long with a longest span of 24 ft (7.3 m) and a deck 32 ft wide.

Who owns Flatrock RD over Adam Schlemmer Baker Dra?

It is owned by the County Highway Agency.