US Bridges

Whitmore Lake Road over Cn-Gtc-Gtw RR (abn)

Fair

Livingston County, Michigan · Sec 32 Green Oak Twp · Structure no. 000000000005841

Built
1960
65 years old
Condition
Fair
inspected July 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
138 ft
3 main spans
Daily traffic
2,433
2020 count
Owner
County
County Highway Agency

About this bridge

Whitmore Lake Road over Cn-Gtc-Gtw RR (abn) is a prestressed concrete box beam or girders - multiple carrying Whitmore Lake Road over Cn-Gtc-Gtw RR (abn) in Livingston 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 fair condition with a lowest component rating of 5 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 2,433 vehicles a day, projected to reach 2,920 by 2040. The structure is 138 ft (42 m) long and 33 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesWhitmore Lake Road
CrossesCn-Gtc-Gtw RR (abn)
LocationSec 32 Green Oak Twp
RouteCounty Highway 0
CountyLivingston County
StateMichigan
Coordinates42.44125, -83.7571
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Approach roadway alignment8: Equal to present desirable criteria
Operating rating70.3 US tons
Inventory rating40.3 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length138 ft (42 m)
Longest span45 ft (13.7 m)
Deck width33 ft (10.1 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,433 (2020)
Projected traffic2,920 by 2040
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesOther
Detour if closed3.1 mi (5 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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Whitmore Lake Road over Cn-Gtc-Gtw RR (abn) built?

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

What condition is Whitmore Lake Road over Cn-Gtc-Gtw RR (abn) 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 July 2023.

How much traffic does Whitmore Lake Road over Cn-Gtc-Gtw RR (abn) carry?

About 2,433 vehicles per day (2020 count).

How long is Whitmore Lake Road over Cn-Gtc-Gtw RR (abn)?

The structure is 138 ft (42 m) long with a longest span of 45 ft (13.7 m) and a deck 33 ft wide.

Who owns Whitmore Lake Road over Cn-Gtc-Gtw RR (abn)?

It is owned by the County Highway Agency.