US Bridges

Downington Road over S Br Cass River I/C Drn

Fair

Sanilac County, Michigan · Sec 35 Evergreen Twp · Structure no. 000000000009608

Built
1999
26 years old
Condition
Fair
inspected June 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
109 ft
3 main spans
Daily traffic
160
2010 count
Owner
County
County Highway Agency

About this bridge

Downington Road over S Br Cass River I/C Drn is a prestressed concrete box beam or girders - multiple carrying Downington Road over S Br Cass River I/C Drn in Sanilac County, Michigan. It was built in 1999, so it is 26 years old, younger 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 6 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 160 vehicles a day, roughly 10% of them trucks, projected to reach 290 by 2030. The structure is 109 ft (33.2 m) long and 31 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesDownington Road
CrossesS Br Cass River I/C Drn
LocationSec 35 Evergreen Twp
RouteCounty Highway 0
CountySanilac County
StateMichigan
Coordinates43.50318, -83.02824
Functional classRural Local

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating51.5 US tons
Inventory rating39.7 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans3
Design loadHS 20
Structure length109 ft (33.2 m)
Longest span45 ft (13.6 m)
Deck width31 ft (9.5 m)
Roadway width29 ft (8.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic160 (2010)
Projected traffic290 by 2030
Trucks10%
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 Downington Road over S Br Cass River I/C Drn built?

It was built in 1999, making it 26 years old in 2025.

What condition is Downington Road over S Br Cass River I/C Drn 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 June 2024.

How much traffic does Downington Road over S Br Cass River I/C Drn carry?

About 160 vehicles per day (2010 count), of which roughly 10% are trucks.

How long is Downington Road over S Br Cass River I/C Drn?

The structure is 109 ft (33.2 m) long with a longest span of 45 ft (13.6 m) and a deck 31 ft wide.

Who owns Downington Road over S Br Cass River I/C Drn?

It is owned by the County Highway Agency.