US Bridges

Tripp Road over Laird Creek

PoorPosted for load

Hillsdale County, Michigan · 0.3 MI S of Camden Road · Structure no. 000000000003353

Built
1920
105 years old
Condition
Poor
inspected November 2024
Type
Slab
Wood or Timber
Length
24 ft
1 main span
Daily traffic
37
2014 count
Owner
County
County Highway Agency

About this bridge

Tripp Road over Laird Creek is a wood or timber slab carrying Tripp Road over Laird Creek in Hillsdale County, Michigan. It was built in 1920, so it is 105 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. Its operating status is: posted for load restriction.

It carries about 37 vehicles a day, projected to reach 61 by 2038. The structure is 24 ft (7.3 m) long and 20 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesTripp Road
CrossesLaird Creek
Location0.3 MI S of Camden Road
RouteCounty Highway 0
CountyHillsdale County
StateMichigan
Coordinates41.74731, -84.51477
Functional classRural Local

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.
Superstructure3 SeriousLoss of section, deterioration, spalling or scour have seriously affected primary structural components.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionNovember 2024
Inspection intervalevery 12 months
Operating statusPosted for load restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation3: Basically intolerable, requiring high priority of corrective action
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating37.8 US tons
Inventory rating26.8 US tons

Structure

Structure typeSlab
MaterialWood or Timber
DeckWood or timber
Main spans1
Design loadH 15
Structure length24 ft (7.3 m)
Longest span22 ft (6.7 m)
Deck width20 ft (6.1 m)
Roadway width20 ft (6.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic37 (2014)
Projected traffic61 by 2038
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$120,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Tripp Road over Laird Creek built?

It was built in 1920, making it 105 years old in 2025.

What condition is Tripp Road over Laird Creek 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 November 2024.

How much traffic does Tripp Road over Laird Creek carry?

About 37 vehicles per day (2014 count).

How long is Tripp Road over Laird Creek?

The structure is 24 ft (7.3 m) long with a longest span of 22 ft (6.7 m) and a deck 20 ft wide.

Who owns Tripp Road over Laird Creek?

It is owned by the County Highway Agency.