US Bridges

FAS 734 over Big Branch Cr.

Good

Macoupin County, Illinois · 0.3 MI W Sawyerville · Structure no. 059300800000000

Built
1955
70 years old, rebuilt 2021
Condition
Good
inspected January 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
27 ft
1 main span
Daily traffic
1,200
2021 count
Owner
County
County Highway Agency

About this bridge

FAS 734 over Big Branch Cr. is a prestressed concrete box beam or girders - multiple carrying FAS 734 over Big Branch Cr. in Macoupin County, Illinois. It was built in 1955 and reconstructed in 2021, so it is 70 years old, older 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 1,200 vehicles a day, roughly 8% of them trucks, projected to reach 1,212 by 2046. The structure is 27 ft (8.2 m) long and 27 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesFAS 734
CrossesBig Branch Cr.
Location0.3 MI W Sawyerville
RouteCounty Highway 0
CountyMacoupin County
StateIllinois
Coordinates39.07817, -89.81749
Functional classRural Minor Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck9 ExcellentNo problems noted.
Superstructure9 ExcellentNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJanuary 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation8: Equal to present desirable criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating52.5 US tons
Inventory rating40.3 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 15
Structure length27 ft (8.2 m)
Longest span26 ft (7.9 m)
Deck width27 ft (8.2 m)
Roadway width25 ft (7.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,200 (2021)
Projected traffic1,212 by 2046
Trucks8%
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

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$96,000
NavigationNo navigation control on waterway

Frequently asked questions

When was FAS 734 over Big Branch Cr. built?

It was built in 1955, making it 70 years old in 2025. It was reconstructed in 2021.

What condition is FAS 734 over Big Branch Cr. 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 January 2023.

How much traffic does FAS 734 over Big Branch Cr. carry?

About 1,200 vehicles per day (2021 count), of which roughly 8% are trucks.

How long is FAS 734 over Big Branch Cr.?

The structure is 27 ft (8.2 m) long with a longest span of 26 ft (7.9 m) and a deck 27 ft wide.

Who owns FAS 734 over Big Branch Cr.?

It is owned by the County Highway Agency.