US Bridges

Mt Morris RD over Armstrong Creek

Good

Genesee County, Michigan · Bet Johnson and Elms Rds · Structure no. 000000000002729

Built
1986
39 years old
Condition
Good
inspected November 2024
Type
Channel Beam
Prestressed Concrete
Length
24 ft
1 main span
Daily traffic
7,156
2018 count
Owner
County
County Highway Agency

About this bridge

Mt Morris RD over Armstrong Creek is a prestressed concrete channel beam carrying Mt Morris RD over Armstrong Creek in Genesee County, Michigan. It was built in 1986, so it is 39 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 7,156 vehicles a day, roughly 5% of them trucks, projected to reach 12,925 by 2038. The structure is 24 ft (7.3 m) long and 43 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesMt Morris RD
CrossesArmstrong Creek
LocationBet Johnson and Elms Rds
RouteCounty Highway 2574
Coordinates43.11792, -83.82673
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionNovember 2024
Inspection intervalevery 12 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating107.1 US tons
Inventory rating107.1 US tons

Structure

Structure typeChannel Beam
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length24 ft (7.3 m)
Longest span22 ft (6.7 m)
Deck width43 ft (13 m)
Roadway width42 ft (12.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,156 (2018)
Projected traffic12,925 by 2038
Trucks5%
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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Mt Morris RD over Armstrong Creek built?

It was built in 1986, making it 39 years old in 2025.

What condition is Mt Morris RD over Armstrong 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 November 2024.

How much traffic does Mt Morris RD over Armstrong Creek carry?

About 7,156 vehicles per day (2018 count), of which roughly 5% are trucks.

How long is Mt Morris RD over Armstrong Creek?

The structure is 24 ft (7.3 m) long with a longest span of 22 ft (6.7 m) and a deck 43 ft wide.

Who owns Mt Morris RD over Armstrong Creek?

It is owned by the County Highway Agency.