US Bridges

Hammerberg over Swartz Creek

Good

Genesee County, Michigan · In Flint · Structure no. 000000000002842

Built
1970
55 years old, rebuilt 2012
Condition
Good
inspected December 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
97 ft
3 main spans
Daily traffic
14,129
2014 count
Owner
City
City or Municipal Highway Agency

About this bridge

Hammerberg over Swartz Creek is a prestressed concrete stringer/multi-beam or girder carrying Hammerberg over Swartz Creek in Genesee County, Michigan. It was built in 1970 and reconstructed in 2012, so it is 55 years old, older 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 14,129 vehicles a day, roughly 8% of them trucks, projected to reach 17,240 by 2034. The structure is 97 ft (29.5 m) long and 88 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesHammerberg
CrossesSwartz Creek
LocationIn Flint
RouteCity Street 2002
Coordinates42.9995, -83.70717
Functional classUrban 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 inspectionDecember 2023
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 geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating54.3 US tons
Inventory rating32.7 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length97 ft (29.5 m)
Longest span32 ft (9.7 m)
Deck width88 ft (26.8 m)
Roadway width76 ft (23.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic14,129 (2014)
Projected traffic17,240 by 2034
Trucks8%
Lanes on structure6
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal 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 Hammerberg over Swartz Creek built?

It was built in 1970, making it 55 years old in 2025. It was reconstructed in 2012.

What condition is Hammerberg over Swartz 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 December 2023.

How much traffic does Hammerberg over Swartz Creek carry?

About 14,129 vehicles per day (2014 count), of which roughly 8% are trucks.

How long is Hammerberg over Swartz Creek?

The structure is 97 ft (29.5 m) long with a longest span of 32 ft (9.7 m) and a deck 88 ft wide.

Who owns Hammerberg over Swartz Creek?

It is owned by the City or Municipal Highway Agency.