US Bridges

Snakehill Road over Silver Creek

Fair

Union County, Indiana · 00.35 W of SR 44 · Structure no. 8100017

Built
1979
46 years old
Condition
Fair
inspected May 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
102 ft
2 main spans
Daily traffic
100
2019 count
Owner
County
County Highway Agency

About this bridge

Snakehill Road over Silver Creek is a prestressed concrete box beam or girders - multiple carrying Snakehill Road over Silver Creek in Union County, Indiana. It was built in 1979, so it is 46 years old, younger 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 100 vehicles a day, roughly 2% of them trucks, projected to reach 175 by 2039. The structure is 102 ft (31 m) long and 22 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

Open in Google Maps
CarriesSnakehill Road
CrossesSilver Creek
Location00.35 W of SR 44
RouteCounty Highway 18
CountyUnion County
StateIndiana
Coordinates39.63471, -84.94546
Functional classRural Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating100 US tons
Inventory rating72.1 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans2
Design loadHS 20
Structure length102 ft (31 m)
Longest span48 ft (14.7 m)
Deck width22 ft (6.7 m)
Roadway width22 ft (6.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic100 (2019)
Projected traffic175 by 2039
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Snakehill Road over Silver Creek built?

It was built in 1979, making it 46 years old in 2025.

What condition is Snakehill Road over Silver Creek 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 May 2023.

How much traffic does Snakehill Road over Silver Creek carry?

About 100 vehicles per day (2019 count), of which roughly 2% are trucks.

How long is Snakehill Road over Silver Creek?

The structure is 102 ft (31 m) long with a longest span of 48 ft (14.7 m) and a deck 22 ft wide.

Who owns Snakehill Road over Silver Creek?

It is owned by the County Highway Agency.