US Bridges

TR120 Oldmazon RD over Murray Sluice

Poor

Grundy County, Illinois · .81 MI S Gr Ridge RD · Structure no. 032500600000000

Built
1981
44 years old
Condition
Poor
inspected October 2024
Type
Channel Beam
Concrete
Length
70 ft
3 main spans
Daily traffic
150
2024 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

TR120 Oldmazon RD over Murray Sluice is a concrete channel beam carrying TR120 Oldmazon RD over Murray Sluice in Grundy County, Illinois. It was built in 1981, so it is 44 years old, younger 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.

It carries about 150 vehicles a day, roughly 20% of them trucks, projected to reach 210 by 2046. The structure is 70 ft (21.3 m) long and 26 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesTR120 Oldmazon RD
CrossesMurray Sluice
Location.81 MI S Gr Ridge RD
RouteCounty Highway 0
CountyGrundy County
StateIllinois
Coordinates41.22994, -88.39923
Functional classRural Local

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
Deck7 GoodSome minor problems.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating54.7 US tons
Inventory rating32.8 US tons

Structure

Structure typeChannel Beam
MaterialConcrete
DeckConcrete, precast panels
Main spans3
Design loadHS 20
Structure length70 ft (21.3 m)
Longest span24 ft (7.3 m)
Deck width26 ft (8 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic150 (2024)
Projected traffic210 by 2046
Trucks20%
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

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 TR120 Oldmazon RD over Murray Sluice built?

It was built in 1981, making it 44 years old in 2025.

What condition is TR120 Oldmazon RD over Murray Sluice 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 TR120 Oldmazon RD over Murray Sluice carry?

About 150 vehicles per day (2024 count), of which roughly 20% are trucks.

How long is TR120 Oldmazon RD over Murray Sluice?

The structure is 70 ft (21.3 m) long with a longest span of 24 ft (7.3 m) and a deck 26 ft wide.

Who owns TR120 Oldmazon RD over Murray Sluice?

It is owned by the Town or Township Highway Agency.