US Bridges

Whittemore RD over E Br of Au Gres River

Good

Iosco County, Michigan · 5.125 MI E Whittemore · Structure no. 000000000004135

Built
2017
8 years old
Condition
Good
inspected June 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
75 ft
1 main span
Daily traffic
757
2016 count
Owner
County
County Highway Agency

About this bridge

Whittemore RD over E Br of Au Gres River is a prestressed concrete stringer/multi-beam or girder carrying Whittemore RD over E Br of Au Gres River in Iosco County, Michigan. It was built in 2017, so it is 8 years old, younger than the Michigan average of 48.3 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 757 vehicles a day, roughly 6% of them trucks, projected to reach 1,019 by 2036. The structure is 75 ft (22.9 m) long and 35 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesWhittemore RD
CrossesE Br of Au Gres River
Location5.125 MI E Whittemore
RouteCounty Highway 3520
CountyIosco County
StateMichigan
Coordinates44.23444, -83.70083
Functional classRural Major 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 protection8 Very GoodNo problems noted.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation8: Equal to present desirable criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating76.1 US tons
Inventory rating57.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadGreater than HL 93
Structure length75 ft (22.9 m)
Longest span73 ft (22.1 m)
Deck width35 ft (10.6 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic757 (2016)
Projected traffic1,019 by 2036
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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$335,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Whittemore RD over E Br of Au Gres River built?

It was built in 2017, making it 8 years old in 2025.

What condition is Whittemore RD over E Br of Au Gres River 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 June 2024.

How much traffic does Whittemore RD over E Br of Au Gres River carry?

About 757 vehicles per day (2016 count), of which roughly 6% are trucks.

How long is Whittemore RD over E Br of Au Gres River?

The structure is 75 ft (22.9 m) long with a longest span of 73 ft (22.1 m) and a deck 35 ft wide.

Who owns Whittemore RD over E Br of Au Gres River?

It is owned by the County Highway Agency.