US Bridges

Ir 71 NB over Mason-Montgomery

Good

Warren County, Ohio · .09 MI N of Ham\war Line · Structure no. 8301727

Built
1994
31 years old
Condition
Good
inspected February 2025
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
304 ft
4 main spans
Daily traffic
39,294
2015 count
Owner
State
State Highway Agency

About this bridge

Ir 71 NB over Mason-Montgomery is a steel continuous stringer/multi-beam or girder carrying Ir 71 NB over Mason-Montgomery in Warren County, Ohio. It was built in 1994, so it is 31 years old, younger than the Ohio average of 47.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 39,294 vehicles a day, roughly 11% of them trucks, projected to reach 54,540 by 2035. The structure is 304 ft (92.6 m) long and 95 ft wide.

CarriesIr 71 NB
CrossesMason-Montgomery
Location.09 MI N of Ham\war Line
RouteInterstate 71
StateOhio
Coordinates39.29345, -84.31603
Functional classUrban Principal Arterial - Interstate

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Last inspectionFebruary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation8: Equal to present desirable criteria
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment9: Superior to present desirable criteria
Operating rating75.7 US tons
Inventory rating58.5 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20 + Mod
Structure length304 ft (92.6 m)
Longest span112 ft (34.1 m)
Deck width95 ft (29.1 m)
Roadway width90 ft (27.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic39,294 (2015)
Projected traffic54,540 by 2035
Trucks11%
Lanes on structure6
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed—
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

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 Ir 71 NB over Mason-Montgomery built?

It was built in 1994, making it 31 years old in 2025.

What condition is Ir 71 NB over Mason-Montgomery in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in February 2025.

How much traffic does Ir 71 NB over Mason-Montgomery carry?

About 39,294 vehicles per day (2015 count), of which roughly 11% are trucks.

How long is Ir 71 NB over Mason-Montgomery?

The structure is 304 ft (92.6 m) long with a longest span of 112 ft (34.1 m) and a deck 95 ft wide.

Who owns Ir 71 NB over Mason-Montgomery?

It is owned by the State Highway Agency.