US Bridges

Ill 70 over S Branch Otter CR

Fair

Winnebago County, Illinois · 0.8 MI North Rt 75 · Structure no. 101019100000000

Built
2010
15 years old
Condition
Fair
inspected September 2024
Type
Slab
Concrete
Length
68 ft
2 main spans
Daily traffic
2,700
2023 count
Owner
State
State Highway Agency

About this bridge

Ill 70 over S Branch Otter CR is a concrete slab carrying Ill 70 over S Branch Otter CR in Winnebago County, Illinois. It was built in 2010, so it is 15 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 2,700 vehicles a day, roughly 4% of them trucks, projected to reach 3,131 by 2046. The structure is 68 ft (20.6 m) long and 44 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesIll 70
CrossesS Branch Otter CR
Location0.8 MI North Rt 75
RouteState Highway 70
CountyWinnebago County
StateIllinois
Coordinates42.43124, -89.33173
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.
Substructure8 Very GoodNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating51 US tons
Inventory rating39.2 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans2
Design loadHS 25 or greater
Structure length68 ft (20.6 m)
Longest span32 ft (9.9 m)
Deck width44 ft (13.3 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,700 (2023)
Projected traffic3,131 by 2046
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 Ill 70 over S Branch Otter CR built?

It was built in 2010, making it 15 years old in 2025.

What condition is Ill 70 over S Branch Otter CR 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 September 2024.

How much traffic does Ill 70 over S Branch Otter CR carry?

About 2,700 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is Ill 70 over S Branch Otter CR?

The structure is 68 ft (20.6 m) long with a longest span of 32 ft (9.9 m) and a deck 44 ft wide.

Who owns Ill 70 over S Branch Otter CR?

It is owned by the State Highway Agency.