US Bridges

Gerber Woods Drive over Trib to Dunlap Lake

Fair

Madison County, Illinois · 0.11 MI E Gerber RD · Structure no. 060670700000000

Built
1994
31 years old
Condition
Fair
inspected January 2023
Type
Culvert
Steel
Length
43 ft
4 main spans
Daily traffic
250
2021 count
Owner
City
City or Municipal Highway Agency

About this bridge

Gerber Woods Drive over Trib to Dunlap Lake is a steel culvert carrying Gerber Woods Drive over Trib to Dunlap Lake in Madison 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 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 250 vehicles a day, roughly 4% of them trucks, projected to reach 268 by 2046. The structure is 43 ft (13 m) long. If it were closed, the detour would be 98.8 mi (159 km).

Location

Open in Google Maps
CarriesGerber Woods Drive
CrossesTrib to Dunlap Lake
Location0.11 MI E Gerber RD
RouteCity Street 0
CountyMadison County
StateIllinois
Coordinates38.78815, -89.93353
Functional classUrban 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
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJanuary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating98.2 US tons
Inventory rating98.2 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans4
Design loadUnknown
Structure length43 ft (13 m)
Longest span9 ft (2.7 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic250 (2021)
Projected traffic268 by 2046
Trucks4%
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

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal 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 Gerber Woods Drive over Trib to Dunlap Lake built?

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

What condition is Gerber Woods Drive over Trib to Dunlap Lake 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 January 2023.

How much traffic does Gerber Woods Drive over Trib to Dunlap Lake carry?

About 250 vehicles per day (2021 count), of which roughly 4% are trucks.

How long is Gerber Woods Drive over Trib to Dunlap Lake?

The structure is 43 ft (13 m) long with a longest span of 9 ft (2.7 m).

Who owns Gerber Woods Drive over Trib to Dunlap Lake?

It is owned by the City or Municipal Highway Agency.