US Bridges

Marrill RD over Black Walnut CR

Fair

Ogle County, Illinois · 5 M SW Stillman Vall · Structure no. 071327400000000

Built
1984
41 years old
Condition
Fair
inspected July 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
49 ft
1 main span
Daily traffic
275
2022 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

Marrill RD over Black Walnut CR is a prestressed concrete box beam or girders - multiple carrying Marrill RD over Black Walnut CR in Ogle County, Illinois. It was built in 1984, so it is 41 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 275 vehicles a day, roughly 24% of them trucks, projected to reach 208 by 2046. The structure is 49 ft (14.9 m) long and 24 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesMarrill RD
CrossesBlack Walnut CR
Location5 M SW Stillman Vall
RouteCounty Highway 0
CountyOgle County
StateIllinois
Coordinates42.07336, -89.2383
Functional classRural 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJuly 2023
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 geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
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 typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length49 ft (14.9 m)
Longest span47 ft (14.3 m)
Deck width24 ft (7.3 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic275 (2022)
Projected traffic208 by 2046
Trucks24%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 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 Marrill RD over Black Walnut CR built?

It was built in 1984, making it 41 years old in 2025.

What condition is Marrill RD over Black Walnut 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 July 2023.

How much traffic does Marrill RD over Black Walnut CR carry?

About 275 vehicles per day (2022 count), of which roughly 24% are trucks.

How long is Marrill RD over Black Walnut CR?

The structure is 49 ft (14.9 m) long with a longest span of 47 ft (14.3 m) and a deck 24 ft wide.

Who owns Marrill RD over Black Walnut CR?

It is owned by the Town or Township Highway Agency.