US Bridges

Watterson RD over Martin Johnson Main

Fair

Allen County, Indiana · 00.11 W Madden Road · Structure no. 0200658

Built
1937
88 years old
Condition
Fair
inspected June 2024
Type
Slab
Concrete
Length
23 ft
1 main span
Daily traffic
108
2018 count
Owner
County
County Highway Agency

About this bridge

Watterson RD over Martin Johnson Main is a concrete slab carrying Watterson RD over Martin Johnson Main in Allen County, Indiana. It was built in 1937, so it is 88 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 108 vehicles a day, roughly 5% of them trucks, projected to reach 162 by 2038. The structure is 23 ft (7 m) long and 26 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

CarriesWatterson RD
CrossesMartin Johnson Main
Location00.11 W Madden Road
RouteCounty Highway 0
StateIndiana
Coordinates41.21325, -85.28989
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 inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating56.8 US tons
Inventory rating34 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length23 ft (7 m)
Longest span20 ft (6.1 m)
Deck width26 ft (7.8 m)
Roadway width23 ft (7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic108 (2018)
Projected traffic162 by 2038
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed0.6 mi (1 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusPossibly eligible for the National Register; requires further investigation
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Watterson RD over Martin Johnson Main built?

It was built in 1937, making it 88 years old in 2025.

What condition is Watterson RD over Martin Johnson Main 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 June 2024.

How much traffic does Watterson RD over Martin Johnson Main carry?

About 108 vehicles per day (2018 count), of which roughly 5% are trucks.

How long is Watterson RD over Martin Johnson Main?

The structure is 23 ft (7 m) long with a longest span of 20 ft (6.1 m) and a deck 26 ft wide.

Who owns Watterson RD over Martin Johnson Main?

It is owned by the County Highway Agency.