US Bridges

FAS 732 over Otter Lake

PoorPosted for load

Macoupin County, Illinois · 6 Mi. W. Girard · Structure no. 059300500000000

Built
1968
57 years old
Condition
Poor
inspected October 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
56 ft
1 main span
Daily traffic
950
2021 count
Owner
County
County Highway Agency

About this bridge

FAS 732 over Otter Lake is a prestressed concrete box beam or girders - multiple carrying FAS 732 over Otter Lake in Macoupin County, Illinois. It was built in 1968, so it is 57 years old, older than the Illinois average of 45.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. Its operating status is: posted for load restriction.

It carries about 950 vehicles a day, roughly 8% of them trucks, projected to reach 960 by 2046. The structure is 56 ft (17 m) long and 46 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

CarriesFAS 732
CrossesOtter Lake
Location6 Mi. W. Girard
RouteCounty Highway 0
Coordinates39.43498, -89.89688
Functional classRural Major Collector

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating35.4 US tons
Inventory rating15.3 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length56 ft (17 m)
Longest span51 ft (15.5 m)
Deck width46 ft (14 m)
Roadway width43 ft (13 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic950 (2021)
Projected traffic960 by 2046
Trucks8%
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 732 over Otter Lake built?

It was built in 1968, making it 57 years old in 2025.

What condition is FAS 732 over Otter Lake in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in October 2024.

How much traffic does FAS 732 over Otter Lake carry?

About 950 vehicles per day (2021 count), of which roughly 8% are trucks.

How long is FAS 732 over Otter Lake?

The structure is 56 ft (17 m) long with a longest span of 51 ft (15.5 m) and a deck 46 ft wide.

Who owns FAS 732 over Otter Lake?

It is owned by the County Highway Agency.