US Bridges

FAS 863 over Rockcastle Creek

Fair

Randolph County, Illinois · 863 over Rockcastle · Structure no. 079319300000000

Built
1948
77 years old
Condition
Fair
inspected March 2023
Type
Slab
Concrete
Length
33 ft
1 main span
Daily traffic
1,450
2024 count
Owner
County
County Highway Agency

About this bridge

FAS 863 over Rockcastle Creek is a concrete slab carrying FAS 863 over Rockcastle Creek in Randolph County, Illinois. It was built in 1948, so it is 77 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 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 1,450 vehicles a day, roughly 6% of them trucks, projected to reach 1,768 by 2046. The structure is 33 ft (10.1 m) long and 29 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

Location

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CarriesFAS 863
CrossesRockcastle Creek
Location863 over Rockcastle
RouteCounty Highway 0
CountyRandolph County
StateIllinois
Coordinates37.9647, -89.66077
Functional classRural Major 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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating51 US tons
Inventory rating29.7 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 15
Structure length33 ft (10.1 m)
Longest span31 ft (9.4 m)
Deck width29 ft (8.7 m)
Roadway width25 ft (7.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,450 (2024)
Projected traffic1,768 by 2046
Trucks6%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.8 mi (11 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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 FAS 863 over Rockcastle Creek built?

It was built in 1948, making it 77 years old in 2025.

What condition is FAS 863 over Rockcastle Creek 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 FAS 863 over Rockcastle Creek carry?

About 1,450 vehicles per day (2024 count), of which roughly 6% are trucks.

How long is FAS 863 over Rockcastle Creek?

The structure is 33 ft (10.1 m) long with a longest span of 31 ft (9.4 m) and a deck 29 ft wide.

Who owns FAS 863 over Rockcastle Creek?

It is owned by the County Highway Agency.