US Bridges

Tunnel Mill RD over Flag Run

Good

Clark County, Indiana · 00.00 SW of Westport Road · Structure no. 1000086

Built
1935
90 years old, rebuilt 2015
Condition
Good
inspected March 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
24 ft
1 main span
Daily traffic
400
2018 count
Owner
County
County Highway Agency

About this bridge

Tunnel Mill RD over Flag Run is a steel stringer/multi-beam or girder carrying Tunnel Mill RD over Flag Run in Clark County, Indiana. It was built in 1935 and reconstructed in 2015, so it is 90 years old, older than the Indiana average of 46.6 years.

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

It carries about 400 vehicles a day, roughly 3% of them trucks, projected to reach 700 by 2038. The structure is 24 ft (7.4 m) long and 25 ft wide. If it were closed, the detour would be 5.6 mi (9 km).

Location

Open in Google Maps
CarriesTunnel Mill RD
CrossesFlag Run
Location00.00 SW of Westport Road
RouteCounty Highway 0
CountyClark County
StateIndiana
Coordinates38.53067, -85.55309
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
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating92.7 US tons
Inventory rating55.4 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length24 ft (7.4 m)
Longest span23 ft (7.1 m)
Deck width25 ft (7.7 m)
Roadway width25 ft (7.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic400 (2018)
Projected traffic700 by 2038
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5.6 mi (9 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 Tunnel Mill RD over Flag Run built?

It was built in 1935, making it 90 years old in 2025. It was reconstructed in 2015.

What condition is Tunnel Mill RD over Flag Run 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 March 2024.

How much traffic does Tunnel Mill RD over Flag Run carry?

About 400 vehicles per day (2018 count), of which roughly 3% are trucks.

How long is Tunnel Mill RD over Flag Run?

The structure is 24 ft (7.4 m) long with a longest span of 23 ft (7.1 m) and a deck 25 ft wide.

Who owns Tunnel Mill RD over Flag Run?

It is owned by the County Highway Agency.