US Bridges

TR 487 over Prong Spring Creek

Good

Pike County, Illinois · 2 MI So. Nebo · Structure no. 075502100000000

Built
1994
31 years old
Condition
Good
inspected April 2024
Type
Culvert
Concrete Continuous
Length
22 ft
3 main spans
Daily traffic
25
2023 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

TR 487 over Prong Spring Creek is a concrete continuous culvert carrying TR 487 over Prong Spring Creek in Pike County, Illinois. It was built in 1994, so it is 31 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 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 25 vehicles a day, projected to reach 29 by 2046. The structure is 22 ft (6.8 m) long. If it were closed, the detour would be 98.8 mi (159 km).

Location

Open in Google Maps
CarriesTR 487
CrossesProng Spring Creek
Location2 MI So. Nebo
RouteCounty Highway 0
CountyPike County
StateIllinois
Coordinates39.424, -90.73774
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
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Culvert7 GoodSome minor problems.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Waterway adequacy3: Basically intolerable, requiring high priority of corrective action
Approach roadway alignment6: Equal to present minimum criteria
Operating rating57.9 US tons
Inventory rating34.6 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans3
Design loadHS 20
Structure length22 ft (6.8 m)
Longest span8 ft (2.3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic25 (2023)
Projected traffic29 by 2046
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.8 mi (159 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 487 over Prong Spring Creek built?

It was built in 1994, making it 31 years old in 2025.

What condition is TR 487 over Prong Spring 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 April 2024.

How much traffic does TR 487 over Prong Spring Creek carry?

About 25 vehicles per day (2023 count).

How long is TR 487 over Prong Spring Creek?

The structure is 22 ft (6.8 m) long with a longest span of 8 ft (2.3 m).

Who owns TR 487 over Prong Spring Creek?

It is owned by the Town or Township Highway Agency.