US Bridges

TR 83 over Nassa CR

Fair

Macoupin County, Illinois · 2 MI E Palmyra · Structure no. 059327200000000

Built
1980
45 years old
Condition
Fair
inspected March 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
130 ft
3 main spans
Daily traffic
20
2021 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

TR 83 over Nassa CR is a prestressed concrete box beam or girders - multiple carrying TR 83 over Nassa CR in Macoupin County, Illinois. It was built in 1980, so it is 45 years old, younger 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 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 20 vehicles a day, roughly 90% of them trucks, projected to reach 20 by 2046. The structure is 130 ft (39.7 m) long and 27 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesTR 83
CrossesNassa CR
Location2 MI E Palmyra
RouteCounty Highway 0
Coordinates39.43976, -89.94828
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.
Substructure8 Very GoodNo problems noted.
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 evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating68.9 US tons
Inventory rating41.1 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans3
Design loadHS 20
Structure length130 ft (39.7 m)
Longest span42 ft (12.7 m)
Deck width27 ft (8.2 m)
Roadway width27 ft (8.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic20 (2021)
Projected traffic20 by 2046
Trucks90%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 83 over Nassa CR built?

It was built in 1980, making it 45 years old in 2025.

What condition is TR 83 over Nassa CR 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 83 over Nassa CR carry?

About 20 vehicles per day (2021 count), of which roughly 90% are trucks.

How long is TR 83 over Nassa CR?

The structure is 130 ft (39.7 m) long with a longest span of 42 ft (12.7 m) and a deck 27 ft wide.

Who owns TR 83 over Nassa CR?

It is owned by the Town or Township Highway Agency.