US Bridges

S County Line Road over Maple River

Poor

Gratiot County, Michigan · Sec 33 Elba Twp · Structure no. 000000000003189

Built
1973
52 years old
Condition
Poor
inspected July 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
100 ft
1 main span
Daily traffic
139
2004 count
Owner
County
County Highway Agency

About this bridge

S County Line Road over Maple River is a steel stringer/multi-beam or girder carrying S County Line Road over Maple River in Gratiot County, Michigan. It was built in 1973, so it is 52 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 139 vehicles a day, roughly 7% of them trucks, projected to reach 171 by 2024. The structure is 100 ft (30.4 m) long and 21 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesS County Line Road
CrossesMaple River
LocationSec 33 Elba Twp
RouteCounty Highway 0
Coordinates43.11774, -84.43312
Functional classRural Local

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
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2024
Inspection intervalevery 12 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating81.5 US tons
Inventory rating48.8 US tons

Structure

MaterialSteel
DeckCorrugated steel
Main spans1
Design loadHS 20 + Mod
Structure length100 ft (30.4 m)
Longest span96 ft (29.2 m)
Deck width21 ft (6.3 m)
Roadway width20 ft (6.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic139 (2004)
Projected traffic171 by 2024
Trucks7%
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 S County Line Road over Maple River built?

It was built in 1973, making it 52 years old in 2025.

What condition is S County Line Road over Maple River 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 July 2024.

How much traffic does S County Line Road over Maple River carry?

About 139 vehicles per day (2004 count), of which roughly 7% are trucks.

How long is S County Line Road over Maple River?

The structure is 100 ft (30.4 m) long with a longest span of 96 ft (29.2 m) and a deck 21 ft wide.

Who owns S County Line Road over Maple River?

It is owned by the County Highway Agency.