US Bridges

Milltown Road over Slick Run

Fair

Crawford County, Indiana · 0.00 S of Pilot Knob · Structure no. 1300018

Built
1940
85 years old
Condition
Fair
inspected September 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
58 ft
1 main span
Daily traffic
240
2023 count
Owner
County
County Highway Agency

About this bridge

Milltown Road over Slick Run is a steel stringer/multi-beam or girder carrying Milltown Road over Slick Run in Crawford County, Indiana. It was built in 1940, so it is 85 years old, older 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 5 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 240 vehicles a day, roughly 12% of them trucks, projected to reach 340 by 2043. The structure is 58 ft (17.6 m) long and 20 ft wide. If it were closed, the detour would be 5.6 mi (9 km).

Location

Open in Google Maps
CarriesMilltown Road
CrossesSlick Run
Location0.00 S of Pilot Knob
RouteCounty Highway 0
CountyCrawford County
StateIndiana
Coordinates38.31676, -86.29048
Functional classRural Minor Collector

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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating45.7 US tons
Inventory rating35.4 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length58 ft (17.6 m)
Longest span55 ft (16.7 m)
Deck width20 ft (6.1 m)
Roadway width19 ft (5.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic240 (2023)
Projected traffic340 by 2043
Trucks12%
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 statusEligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Milltown Road over Slick Run built?

It was built in 1940, making it 85 years old in 2025.

What condition is Milltown Road over Slick Run 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 September 2023.

How much traffic does Milltown Road over Slick Run carry?

About 240 vehicles per day (2023 count), of which roughly 12% are trucks.

How long is Milltown Road over Slick Run?

The structure is 58 ft (17.6 m) long with a longest span of 55 ft (16.7 m) and a deck 20 ft wide.

Who owns Milltown Road over Slick Run?

It is owned by the County Highway Agency.