US Bridges

Marine City HWY over Meldrum Drain

Fair

St. Clair County, Michigan · Sec 34 Casco Twp · Structure no. 000000000010036

Built
1946
79 years old, rebuilt 2017
Condition
Fair
inspected November 2023
Type
Box Beam or Girders - Single or Spread
Steel
Length
35 ft
1 main span
Daily traffic
8,050
1994 count
Owner
County
County Highway Agency

About this bridge

Marine City HWY over Meldrum Drain is a steel box beam or girders - single or spread carrying Marine City HWY over Meldrum Drain in St. Clair County, Michigan. It was built in 1946 and reconstructed in 2017, so it is 79 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 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 8,050 vehicles a day, roughly 7% of them trucks, projected to reach 9,500 by 2014. The structure is 35 ft (10.6 m) long and 41 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesMarine City HWY
CrossesMeldrum Drain
LocationSec 34 Casco Twp
RouteCounty Highway 7728
CountySt. Clair County
StateMichigan
Coordinates42.72357, -82.65509
Functional classRural Major Collector

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionNovember 2023
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 geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating76.4 US tons
Inventory rating59 US tons

Structure

Structure typeBox Beam or Girders - Single or Spread
MaterialSteel
DeckConcrete, precast panels
Main spans1
Design loadGreater than HL 93
Structure length35 ft (10.6 m)
Longest span33 ft (10 m)
Deck width41 ft (12.6 m)
Roadway width38 ft (11.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8,050 (1994)
Projected traffic9,500 by 2014
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 Marine City HWY over Meldrum Drain built?

It was built in 1946, making it 79 years old in 2025. It was reconstructed in 2017.

What condition is Marine City HWY over Meldrum Drain 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 November 2023.

How much traffic does Marine City HWY over Meldrum Drain carry?

About 8,050 vehicles per day (1994 count), of which roughly 7% are trucks.

How long is Marine City HWY over Meldrum Drain?

The structure is 35 ft (10.6 m) long with a longest span of 33 ft (10 m) and a deck 41 ft wide.

Who owns Marine City HWY over Meldrum Drain?

It is owned by the County Highway Agency.