US Bridges

Barnards Mill Road over Nippersink CR

Good

McHenry County, Illinois · At Howe RD Intersect · Structure no. 056303100000000

Built
1950
75 years old, rebuilt 2011
Condition
Good
inspected October 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
102 ft
3 main spans
Daily traffic
4,200
2021 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

Barnards Mill Road over Nippersink CR is a steel continuous stringer/multi-beam or girder carrying Barnards Mill Road over Nippersink CR in McHenry County, Illinois. It was built in 1950 and reconstructed in 2011, so it is 75 years old, older 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 4,200 vehicles a day, roughly 11% of them trucks, projected to reach 5,040 by 2046. The structure is 102 ft (31.1 m) long and 28 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

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CarriesBarnards Mill Road
CrossesNippersink CR
LocationAt Howe RD Intersect
CountyMcHenry County
StateIllinois
Coordinates42.41453, -88.34288
Functional classUrban Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2024
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating94.7 US tons
Inventory rating53.6 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length102 ft (31.1 m)
Longest span38 ft (11.5 m)
Deck width28 ft (8.5 m)
Roadway width25 ft (7.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,200 (2021)
Projected traffic5,040 by 2046
Trucks11%
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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$377,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Barnards Mill Road over Nippersink CR built?

It was built in 1950, making it 75 years old in 2025. It was reconstructed in 2011.

What condition is Barnards Mill Road over Nippersink CR 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 October 2024.

How much traffic does Barnards Mill Road over Nippersink CR carry?

About 4,200 vehicles per day (2021 count), of which roughly 11% are trucks.

How long is Barnards Mill Road over Nippersink CR?

The structure is 102 ft (31.1 m) long with a longest span of 38 ft (11.5 m) and a deck 28 ft wide.

Who owns Barnards Mill Road over Nippersink CR?

It is owned by the Town or Township Highway Agency.