US Bridges

Ch 36 over E.Fk. Otter Ck.

PoorPosted for load

Macoupin County, Illinois · 3.0 MI NW Nilwood · Structure no. 059301900000000

Built
1959
66 years old
Condition
Poor
inspected March 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
158 ft
3 main spans
Daily traffic
450
2021 count
Owner
County
County Highway Agency

About this bridge

Ch 36 over E.Fk. Otter Ck. is a prestressed concrete box beam or girders - multiple carrying Ch 36 over E.Fk. Otter Ck. in Macoupin County, Illinois. It was built in 1959, so it is 66 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 3 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 450 vehicles a day, roughly 6% of them trucks, projected to reach 455 by 2046. The structure is 158 ft (48.2 m) long and 28 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesCh 36
CrossesE.Fk. Otter Ck.
Location3.0 MI NW Nilwood
RouteCounty Highway 0
Coordinates39.42789, -89.86897
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
Deck3 SeriousLoss of section, deterioration, spalling or scour have seriously affected primary structural components.
Superstructure3 SeriousLoss of section, deterioration, spalling or scour have seriously affected primary structural components.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation3: Basically intolerable, requiring high priority of corrective action
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating29.3 US tons
Inventory rating0 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans3
Design loadHS 15
Structure length158 ft (48.2 m)
Longest span53 ft (16.2 m)
Deck width28 ft (8.4 m)
Roadway width26 ft (7.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic450 (2021)
Projected traffic455 by 2046
Trucks6%
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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Ch 36 over E.Fk. Otter Ck. built?

It was built in 1959, making it 66 years old in 2025.

What condition is Ch 36 over E.Fk. Otter Ck. 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 March 2023.

How much traffic does Ch 36 over E.Fk. Otter Ck. carry?

About 450 vehicles per day (2021 count), of which roughly 6% are trucks.

How long is Ch 36 over E.Fk. Otter Ck.?

The structure is 158 ft (48.2 m) long with a longest span of 53 ft (16.2 m) and a deck 28 ft wide.

Who owns Ch 36 over E.Fk. Otter Ck.?

It is owned by the County Highway Agency.