US Bridges

Mission Road over Spring Creek

Poor

Isabella County, Michigan · 0.1M S NW Cor Sec 11 T15N · Structure no. 000000000004308

Built
1935
90 years old
Condition
Poor
inspected June 2024
Type
Tee Beam
Concrete
Length
28 ft
1 main span
Daily traffic
5,200
2002 count
Owner
County
County Highway Agency

About this bridge

Mission Road over Spring Creek is a concrete tee beam carrying Mission Road over Spring Creek in Isabella County, Michigan. It was built in 1935, so it is 90 years old, older than the Michigan average of 48.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 5,200 vehicles a day, projected to reach 7,720 by 2022. The structure is 28 ft (8.5 m) long and 39 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesMission Road
CrossesSpring Creek
Location0.1M S NW Cor Sec 11 T15N
RouteCounty Highway 3767
CountyIsabella County
StateMichigan
Coordinates43.71131, -84.7678
Functional classRural Major Collector

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJune 2024
Inspection intervalevery 12 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating49.1 US tons
Inventory rating31.1 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 15
Structure length28 ft (8.5 m)
Longest span24 ft (7.3 m)
Deck width39 ft (11.8 m)
Roadway width34 ft (10.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,200 (2002)
Projected traffic7,720 by 2022
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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$135,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Mission Road over Spring Creek built?

It was built in 1935, making it 90 years old in 2025.

What condition is Mission Road over Spring Creek in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in June 2024.

How much traffic does Mission Road over Spring Creek carry?

About 5,200 vehicles per day (2002 count).

How long is Mission Road over Spring Creek?

The structure is 28 ft (8.5 m) long with a longest span of 24 ft (7.3 m) and a deck 39 ft wide.

Who owns Mission Road over Spring Creek?

It is owned by the County Highway Agency.