US Bridges

East Lamm Road over Sumner Creek

Good

Stephenson County, Illinois · 4 MI NE German Vally · Structure no. 089509800000000

Built
1989
36 years old
Condition
Good
inspected November 2022
Type
Culvert
Concrete
Length
24 ft
2 main spans
Daily traffic
50
2020 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

East Lamm Road over Sumner Creek is a concrete culvert carrying East Lamm Road over Sumner Creek in Stephenson County, Illinois. It was built in 1989, so it is 36 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 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 50 vehicles a day, projected to reach 51 by 2046. The structure is 24 ft (7.3 m) long and 30 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesEast Lamm Road
CrossesSumner Creek
Location4 MI NE German Vally
RouteCounty Highway 0
CountyStephenson County
StateIllinois
Coordinates42.25968, -89.41038
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 protection8 Very GoodNo problems noted.
Culvert8 Very GoodNo problems noted.
Last inspectionNovember 2022
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating48.9 US tons
Inventory rating35.7 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadHS 20
Structure length24 ft (7.3 m)
Longest span11 ft (3.4 m)
Deck width30 ft (9.1 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic50 (2020)
Projected traffic51 by 2046
Trucks0%
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

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 East Lamm Road over Sumner Creek built?

It was built in 1989, making it 36 years old in 2025.

What condition is East Lamm Road over Sumner 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 November 2022.

How much traffic does East Lamm Road over Sumner Creek carry?

About 50 vehicles per day (2020 count).

How long is East Lamm Road over Sumner Creek?

The structure is 24 ft (7.3 m) long with a longest span of 11 ft (3.4 m) and a deck 30 ft wide.

Who owns East Lamm Road over Sumner Creek?

It is owned by the Town or Township Highway Agency.