US Bridges

TR-379A over Dodds Creek

Good

Jefferson County, Illinois · 3 MI SE Mt Vernon · Structure no. 041364900000000

Built
1987
38 years old
Condition
Good
inspected February 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
62 ft
1 main span
Daily traffic
225
2021 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

TR-379A over Dodds Creek is a prestressed concrete box beam or girders - multiple carrying TR-379A over Dodds Creek in Jefferson County, Illinois. It was built in 1987, so it is 38 years old, younger than the Illinois average of 45.3 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 225 vehicles a day, roughly 22% of them trucks, projected to reach 227 by 2046. The structure is 62 ft (18.9 m) long and 24 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

CarriesTR-379A
CrossesDodds Creek
Location3 MI SE Mt Vernon
RouteCounty Highway 0
Coordinates38.25804, -88.85722
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 protection7 GoodSome minor problems.
Last inspectionFebruary 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating48.9 US tons
Inventory rating35.7 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length62 ft (18.9 m)
Longest span58 ft (17.7 m)
Deck width24 ft (7.4 m)
Roadway width24 ft (7.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic225 (2021)
Projected traffic227 by 2046
Trucks22%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerTown or Township Highway Agency
Maintained byTown or Township 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 TR-379A over Dodds Creek built?

It was built in 1987, making it 38 years old in 2025.

What condition is TR-379A over Dodds Creek 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 2023.

How much traffic does TR-379A over Dodds Creek carry?

About 225 vehicles per day (2021 count), of which roughly 22% are trucks.

How long is TR-379A over Dodds Creek?

The structure is 62 ft (18.9 m) long with a longest span of 58 ft (17.7 m) and a deck 24 ft wide.

Who owns TR-379A over Dodds Creek?

It is owned by the Town or Township Highway Agency.