US Bridges

TR 408 over Otter Crk.

Fair

Macoupin County, Illinois · 1 MI W Girard · Structure no. 059318000000000

Built
1900
125 years old, rebuilt 1975
Condition
Fair
inspected March 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
50 ft
1 main span
Daily traffic
125
2021 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

TR 408 over Otter Crk. is a prestressed concrete box beam or girders - multiple carrying TR 408 over Otter Crk. in Macoupin County, Illinois. It was built in 1900 and reconstructed in 1975, so it is 125 years old, older than the Illinois average of 45.3 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 125 vehicles a day, roughly 18% of them trucks, projected to reach 126 by 2046. The structure is 50 ft (15.2 m) long and 21 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesTR 408
CrossesOtter Crk.
Location1 MI W Girard
RouteCounty Highway 0
CountyMacoupin County
StateIllinois
Coordinates39.44868, -89.81261
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 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 geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating50.4 US tons
Inventory rating30.3 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length50 ft (15.2 m)
Longest span48 ft (14.5 m)
Deck width21 ft (6.5 m)
Roadway width20 ft (6.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic125 (2021)
Projected traffic126 by 2046
Trucks18%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 408 over Otter Crk. built?

It was built in 1900, making it 125 years old in 2025. It was reconstructed in 1975.

What condition is TR 408 over Otter Crk. 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 March 2023.

How much traffic does TR 408 over Otter Crk. carry?

About 125 vehicles per day (2021 count), of which roughly 18% are trucks.

How long is TR 408 over Otter Crk.?

The structure is 50 ft (15.2 m) long with a longest span of 48 ft (14.5 m) and a deck 21 ft wide.

Who owns TR 408 over Otter Crk.?

It is owned by the Town or Township Highway Agency.