US Bridges

Blackmer Road over Rio Grande Creek

Good

Muskegon County, Michigan · 0.1 MI S of Mt Garfield · Structure no. 000000000007690

Built
2023
2 years old
Condition
Good
inspected September 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
40 ft
1 main span
Daily traffic
850
2021 count
Owner
County
County Highway Agency

About this bridge

Blackmer Road over Rio Grande Creek is a prestressed concrete stringer/multi-beam or girder carrying Blackmer Road over Rio Grande Creek in Muskegon County, Michigan. It was built in 2023, so it is 2 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 850 vehicles a day, roughly 10% of them trucks, projected to reach 939 by 2041. The structure is 40 ft (12.2 m) long and 35 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesBlackmer Road
CrossesRio Grande Creek
Location0.1 MI S of Mt Garfield
RouteCounty Highway 0
CountyMuskegon County
StateMichigan
Coordinates43.1464, -85.9474
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
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionSeptember 2023
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 rating94.2 US tons
Inventory rating72.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadGreater than HL 93
Structure length40 ft (12.2 m)
Longest span37 ft (11.4 m)
Deck width35 ft (10.8 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic850 (2021)
Projected traffic939 by 2041
Trucks10%
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—
NavigationNo navigation control on waterway

Frequently asked questions

When was Blackmer Road over Rio Grande Creek built?

It was built in 2023, making it 2 years old in 2025.

What condition is Blackmer Road over Rio Grande 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 September 2023.

How much traffic does Blackmer Road over Rio Grande Creek carry?

About 850 vehicles per day (2021 count), of which roughly 10% are trucks.

How long is Blackmer Road over Rio Grande Creek?

The structure is 40 ft (12.2 m) long with a longest span of 37 ft (11.4 m) and a deck 35 ft wide.

Who owns Blackmer Road over Rio Grande Creek?

It is owned by the County Highway Agency.