US Bridges

Merrill RD over South Branch Bad River

Good

Saginaw County, Michigan · 0.1 MI N of Brady Road · Structure no. 000000000009233

Built
2012
13 years old
Condition
Good
inspected July 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
40 ft
1 main span
Daily traffic
1,384
2011 count
Owner
County
County Highway Agency

About this bridge

Merrill RD over South Branch Bad River is a prestressed concrete stringer/multi-beam or girder carrying Merrill RD over South Branch Bad River in Saginaw County, Michigan. It was built in 2012, so it is 13 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 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 1,384 vehicles a day, roughly 5% of them trucks, projected to reach 1,690 by 2031. The structure is 40 ft (12.2 m) long and 39 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesMerrill RD
CrossesSouth Branch Bad River
Location0.1 MI N of Brady Road
RouteCounty Highway 7307
Coordinates43.1881, -84.3266
Functional classRural Minor Arterial

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.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating89.6 US tons
Inventory rating52.5 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadGreater than HL 93
Structure length40 ft (12.2 m)
Longest span37 ft (11.3 m)
Deck width39 ft (11.8 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,384 (2011)
Projected traffic1,690 by 2031
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Merrill RD over South Branch Bad River built?

It was built in 2012, making it 13 years old in 2025.

What condition is Merrill RD over South Branch Bad 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 July 2024.

How much traffic does Merrill RD over South Branch Bad River carry?

About 1,384 vehicles per day (2011 count), of which roughly 5% are trucks.

How long is Merrill RD over South Branch Bad River?

The structure is 40 ft (12.2 m) long with a longest span of 37 ft (11.3 m) and a deck 39 ft wide.

Who owns Merrill RD over South Branch Bad River?

It is owned by the County Highway Agency.