US Bridges

Base Line Road over Cahaogan Creek

Fair

Ingham County, Michigan · 1.1 MI SW of Fitchburg · Structure no. 000000000003893

Built
1944
81 years old
Condition
Fair
inspected June 2023
Type
Tee Beam
Concrete
Length
35 ft
1 main span
Daily traffic
610
2019 count
Owner
County
County Highway Agency

About this bridge

Base Line Road over Cahaogan Creek is a concrete tee beam carrying Base Line Road over Cahaogan Creek in Ingham County, Michigan. It was built in 1944, so it is 81 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 610 vehicles a day, projected to reach 750 by 2039. The structure is 35 ft (10.6 m) long and 31 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesBase Line Road
CrossesCahaogan Creek
Location1.1 MI SW of Fitchburg
RouteCounty Highway 0
CountyIngham County
StateMichigan
Coordinates42.42468, -84.28232
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.
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 inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating54.2 US tons
Inventory rating32.5 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 20
Structure length35 ft (10.6 m)
Longest span35 ft (10.6 m)
Deck width31 ft (9.3 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic610 (2019)
Projected traffic750 by 2039
Trucks0%
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$45,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Base Line Road over Cahaogan Creek built?

It was built in 1944, making it 81 years old in 2025.

What condition is Base Line Road over Cahaogan Creek 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 2023.

How much traffic does Base Line Road over Cahaogan Creek carry?

About 610 vehicles per day (2019 count).

How long is Base Line Road over Cahaogan Creek?

The structure is 35 ft (10.6 m) long with a longest span of 35 ft (10.6 m) and a deck 31 ft wide.

Who owns Base Line Road over Cahaogan Creek?

It is owned by the County Highway Agency.