US Bridges

Sugar Grove over Stillwater River

Good

Miami County, Ohio · 0.38 E of TR76 · Structure no. 5533309

Built
1994
31 years old
Condition
Good
inspected February 2025
Type
Box Beam or Girders - Multiple
Prestressed Concrete Continuous
Length
277 ft
5 main spans
Daily traffic
258
2015 count
Owner
County
County Highway Agency

About this bridge

Sugar Grove over Stillwater River is a prestressed concrete continuous box beam or girders - multiple carrying Sugar Grove over Stillwater River in Miami 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 258 vehicles a day, roughly 7% of them trucks, projected to reach 358 by 2038. The structure is 277 ft (84.4 m) long and 31 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesSugar Grove
CrossesStillwater River
Location0.38 E of TR76
RouteCounty Highway 77
CountyMiami County
StateOhio
Coordinates40.07765, -84.3514
Functional classRural Local

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.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionFebruary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations on dry land well above flood water elevations
Structural evaluation8: Equal to present desirable criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating57.9 US tons
Inventory rating44.6 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans5
Design loadHL 93
Structure length277 ft (84.4 m)
Longest span65 ft (19.8 m)
Deck width31 ft (9.4 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic258 (2015)
Projected traffic358 by 2038
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Sugar Grove over Stillwater River built?

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

What condition is Sugar Grove over Stillwater River 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 Sugar Grove over Stillwater River carry?

About 258 vehicles per day (2015 count), of which roughly 7% are trucks.

How long is Sugar Grove over Stillwater River?

The structure is 277 ft (84.4 m) long with a longest span of 65 ft (19.8 m) and a deck 31 ft wide.

Who owns Sugar Grove over Stillwater River?

It is owned by the County Highway Agency.