US Bridges

Shepardsville RD over Maple River

Poor

Clinton County, Michigan · 1/4 MI N of Walker RD · Structure no. 000000000001936

Built
1958
67 years old
Condition
Poor
inspected October 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
80 ft
2 main spans
Daily traffic
1,083
2011 count
Owner
County
County Highway Agency

About this bridge

Shepardsville RD over Maple River is a prestressed concrete box beam or girders - multiple carrying Shepardsville RD over Maple River in Clinton County, Michigan. It was built in 1958, so it is 67 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 3 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 1,083 vehicles a day, roughly 2% of them trucks, projected to reach 1,956 by 2031. The structure is 80 ft (24.3 m) long and 31 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesShepardsville RD
CrossesMaple River
Location1/4 MI N of Walker RD
RouteCounty Highway 0
Coordinates43.01441, -84.42581
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
Deck3 SeriousLoss of section, deterioration, spalling or scour have seriously affected primary structural components.
Superstructure3 SeriousLoss of section, deterioration, spalling or scour have seriously affected primary structural components.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionOctober 2024
Inspection intervalevery 12 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation3: Basically intolerable, requiring high priority of corrective action
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating38.3 US tons
Inventory rating29.7 US tons

Structure

MaterialPrestressed Concrete
DeckOther
Main spans2
Design loadHS 20
Structure length80 ft (24.3 m)
Longest span40 ft (12.2 m)
Deck width31 ft (9.3 m)
Roadway width25 ft (7.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,083 (2011)
Projected traffic1,956 by 2031
Trucks2%
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 proposedWidening with deck rehabilitation or replacement
Estimated improvement cost$178,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Shepardsville RD over Maple River built?

It was built in 1958, making it 67 years old in 2025.

What condition is Shepardsville RD 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 October 2024.

How much traffic does Shepardsville RD over Maple River carry?

About 1,083 vehicles per day (2011 count), of which roughly 2% are trucks.

How long is Shepardsville RD over Maple River?

The structure is 80 ft (24.3 m) long with a longest span of 40 ft (12.2 m) and a deck 31 ft wide.

Who owns Shepardsville RD over Maple River?

It is owned by the County Highway Agency.