US Bridges

Darlington-Mace RD over I-74

Fair

Montgomery County, Indiana · 01.75 E SR 32 · Structure no. 044200

Built
1964
61 years old, rebuilt 2014
Condition
Fair
inspected September 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
226 ft
4 main spans
Daily traffic
420
2021 count
Owner
State
State Highway Agency

About this bridge

Darlington-Mace RD over I-74 is a steel continuous stringer/multi-beam or girder carrying Darlington-Mace RD over I-74 in Montgomery County, Indiana. It was built in 1964 and reconstructed in 2014, so it is 61 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 420 vehicles a day, roughly 3% of them trucks, projected to reach 310 by 2035. The structure is 226 ft (68.8 m) long and 29 ft wide. If it were closed, the detour would be 5.6 mi (9 km).

Location

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CarriesDarlington-Mace RD
CrossesI-74
Location01.75 E SR 32
RouteCounty Highway 0
CountyMontgomery County
StateIndiana
Coordinates40.0288, -86.78942
Functional classRural Major Collector

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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating41.1 US tons
Inventory rating24.6 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length226 ft (68.8 m)
Longest span69 ft (21.1 m)
Deck width29 ft (8.9 m)
Roadway width26 ft (8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic420 (2021)
Projected traffic310 by 2035
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed5.6 mi (9 km)
TollOn a free road
National Highway SystemNo

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 Darlington-Mace RD over I-74 built?

It was built in 1964, making it 61 years old in 2025. It was reconstructed in 2014.

What condition is Darlington-Mace RD over I-74 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 September 2024.

How much traffic does Darlington-Mace RD over I-74 carry?

About 420 vehicles per day (2021 count), of which roughly 3% are trucks.

How long is Darlington-Mace RD over I-74?

The structure is 226 ft (68.8 m) long with a longest span of 69 ft (21.1 m) and a deck 29 ft wide.

Who owns Darlington-Mace RD over I-74?

It is owned by the State Highway Agency.