US Bridges

NB SR-49 over I70

Good

Montgomery County, Ohio · Jct. IR-70 · Structure no. 5704359

Built
1959
66 years old
Condition
Good
inspected September 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
327 ft
4 main spans
Daily traffic
3,706
2015 count
Owner
State
State Highway Agency

About this bridge

NB SR-49 over I70 is a steel continuous stringer/multi-beam or girder carrying NB SR-49 over I70 in Montgomery County, Ohio. It was built in 1959, so it is 66 years old, older 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 3,706 vehicles a day, roughly 15% of them trucks, projected to reach 5,144 by 2035. The structure is 327 ft (99.7 m) long and 42 ft wide.

Location

Open in Google Maps
CarriesNB SR-49
CrossesI70
LocationJct. IR-70
RouteState Highway 49
CountyMontgomery County
StateOhio
Coordinates39.85451, -84.33735
Functional classUrban Other Principal Arterial

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 inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation8: Equal to present desirable criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating64.3 US tons
Inventory rating50 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20 + Mod
Structure length327 ft (99.7 m)
Longest span86 ft (26.2 m)
Deck width42 ft (12.8 m)
Roadway width39 ft (11.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,706 (2015)
Projected traffic5,144 by 2035
Trucks15%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed—
TollOn a free road
National Highway SystemYes

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 NB SR-49 over I70 built?

It was built in 1959, making it 66 years old in 2025.

What condition is NB SR-49 over I70 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 September 2023.

How much traffic does NB SR-49 over I70 carry?

About 3,706 vehicles per day (2015 count), of which roughly 15% are trucks.

How long is NB SR-49 over I70?

The structure is 327 ft (99.7 m) long with a longest span of 86 ft (26.2 m) and a deck 42 ft wide.

Who owns NB SR-49 over I70?

It is owned by the State Highway Agency.