US Bridges

Base Line over CSX RR

Poor

Wayne County, Michigan · Northville E/Novi RD · Structure no. 000000000012101

Built
1960
65 years old
Condition
Poor
inspected March 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
180 ft
3 main spans
Daily traffic
35,730
2015 count
Owner
County
County Highway Agency

About this bridge

Base Line over CSX RR is a steel continuous stringer/multi-beam or girder carrying Base Line over CSX RR in Wayne County, Michigan. It was built in 1960, so it is 65 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 35,730 vehicles a day, roughly 12% of them trucks, projected to reach 37,880 by 2035. The structure is 180 ft (54.9 m) long and 64 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesBase Line
CrossesCSX RR
LocationNorthville E/Novi RD
RouteCounty Highway 2057
Coordinates42.43986, -83.47453
Functional classUrban Minor Arterial

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.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2024
Inspection intervalevery 12 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating73.2 US tons
Inventory rating41.4 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length180 ft (54.9 m)
Longest span72 ft (21.9 m)
Deck width64 ft (19.5 m)
Roadway width52 ft (15.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic35,730 (2015)
Projected traffic37,880 by 2035
Trucks12%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesRailroad
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes

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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Base Line over CSX RR built?

It was built in 1960, making it 65 years old in 2025.

What condition is Base Line over CSX RR 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 March 2024.

How much traffic does Base Line over CSX RR carry?

About 35,730 vehicles per day (2015 count), of which roughly 12% are trucks.

How long is Base Line over CSX RR?

The structure is 180 ft (54.9 m) long with a longest span of 72 ft (21.9 m) and a deck 64 ft wide.

Who owns Base Line over CSX RR?

It is owned by the County Highway Agency.