US Bridges

Mayflower Road over Conrail RR

Poor

St. Joseph County, Indiana · 00.40 N of Fillmore Road · Structure no. 7100101

Built
1970
55 years old, rebuilt 1995
Condition
Poor
inspected September 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
274 ft
7 main spans
Daily traffic
9,063
2019 count
Owner
County
County Highway Agency

About this bridge

Mayflower Road over Conrail RR is a prestressed concrete box beam or girders - multiple carrying Mayflower Road over Conrail RR in St. Joseph County, Indiana. It was built in 1970 and reconstructed in 1995, so it is 55 years old, older than the Indiana average of 46.6 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 9,063 vehicles a day, roughly 16% of them trucks, projected to reach 12,048 by 2039. The structure is 274 ft (83.6 m) long and 46 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

CarriesMayflower Road
CrossesConrail RR
Location00.40 N of Fillmore Road
RouteCity Street 0
StateIndiana
Coordinates41.685, -86.32272
Functional classUrban Other Principal Arterial

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2024
Inspection intervalevery 12 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating56 US tons
Inventory rating33 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans7
Design loadHS 20
Structure length274 ft (83.6 m)
Longest span39 ft (11.8 m)
Deck width46 ft (14.1 m)
Roadway width43 ft (13.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic9,063 (2019)
Projected traffic12,048 by 2039
Trucks16%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesRailroad
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 statusNot eligible for the National Register of Historic Places
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$5.6 million (2024 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was Mayflower Road over Conrail RR built?

It was built in 1970, making it 55 years old in 2025. It was reconstructed in 1995.

What condition is Mayflower Road over Conrail RR in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in September 2024.

How much traffic does Mayflower Road over Conrail RR carry?

About 9,063 vehicles per day (2019 count), of which roughly 16% are trucks.

How long is Mayflower Road over Conrail RR?

The structure is 274 ft (83.6 m) long with a longest span of 39 ft (11.8 m) and a deck 46 ft wide.

Who owns Mayflower Road over Conrail RR?

It is owned by the County Highway Agency.