US Bridges

M-13 over Pattee Creek

Fair

Saginaw County, Michigan · 3.3 MI N of Genesee Col · Structure no. 000000000009076

Built
1939
86 years old, rebuilt 1985
Condition
Fair
inspected July 2023
Type
Tee Beam
Concrete
Length
24 ft
1 main span
Daily traffic
5,700
2015 count
Owner
State
State Highway Agency

About this bridge

M-13 over Pattee Creek is a concrete tee beam carrying M-13 over Pattee Creek in Saginaw County, Michigan. It was built in 1939 and reconstructed in 1985, so it is 86 years old, older than the Michigan average of 48.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 5,700 vehicles a day, roughly 6% of them trucks, projected to reach 6,300 by 2035. The structure is 24 ft (7.4 m) long and 72 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesM-13
CrossesPattee Creek
Location3.3 MI N of Genesee Col
RouteState Highway 13
CountySaginaw County
StateMichigan
Coordinates43.2636, -83.95101
Functional classRural Minor Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry9: Superior to present desirable criteria
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating52.5 US tons
Inventory rating31.4 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 15
Structure length24 ft (7.4 m)
Longest span23 ft (7 m)
Deck width72 ft (21.9 m)
Roadway width69 ft (20.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,700 (2015)
Projected traffic6,300 by 2035
Trucks6%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 M-13 over Pattee Creek built?

It was built in 1939, making it 86 years old in 2025. It was reconstructed in 1985.

What condition is M-13 over Pattee Creek in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in July 2023.

How much traffic does M-13 over Pattee Creek carry?

About 5,700 vehicles per day (2015 count), of which roughly 6% are trucks.

How long is M-13 over Pattee Creek?

The structure is 24 ft (7.4 m) long with a longest span of 23 ft (7 m) and a deck 72 ft wide.

Who owns M-13 over Pattee Creek?

It is owned by the State Highway Agency.