US Bridges

Mcgirr RD over Br. Big Rock Creek

Good

DeKalb County, Illinois · 13300N 1795E · Structure no. 019511300000000

Built
1996
29 years old
Condition
Good
inspected March 2023
Type
Channel Beam
Concrete
Length
41 ft
1 main span
Daily traffic
450
2017 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

Mcgirr RD over Br. Big Rock Creek is a concrete channel beam carrying Mcgirr RD over Br. Big Rock Creek in DeKalb County, Illinois. It was built in 1996, so it is 29 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 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 450 vehicles a day, projected to reach 504 by 2046. The structure is 41 ft (12.4 m) long and 26 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesMcgirr RD
CrossesBr. Big Rock Creek
Location13300N 1795E
RouteCounty Highway 0
CountyDeKalb County
StateIllinois
Coordinates41.8211, -88.60306
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMarch 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
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 rating48.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeChannel Beam
MaterialConcrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length41 ft (12.4 m)
Longest span37 ft (11.4 m)
Deck width26 ft (8 m)
Roadway width26 ft (8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic450 (2017)
Projected traffic504 by 2046
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 Mcgirr RD over Br. Big Rock Creek built?

It was built in 1996, making it 29 years old in 2025.

What condition is Mcgirr RD over Br. Big Rock 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 March 2023.

How much traffic does Mcgirr RD over Br. Big Rock Creek carry?

About 450 vehicles per day (2017 count).

How long is Mcgirr RD over Br. Big Rock Creek?

The structure is 41 ft (12.4 m) long with a longest span of 37 ft (11.4 m) and a deck 26 ft wide.

Who owns Mcgirr RD over Br. Big Rock Creek?

It is owned by the Town or Township Highway Agency.