US Bridges

638 HWY over Little Trout River

PoorClosed to traffic

Presque Isle County, Michigan · 0.5 MI W of US-23 · Structure no. 000000000008994

Built
1930
95 years old
Condition
Poor
inspected September 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
30 ft
1 main span
Daily traffic
30
2013 count
Owner
County
County Highway Agency

About this bridge

638 HWY over Little Trout River is a steel stringer/multi-beam or girder carrying 638 HWY over Little Trout River in Presque Isle County, Michigan. It was built in 1930, so it is 95 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 2 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: closed to all traffic.

It carries about 30 vehicles a day, projected to reach 545 by 2033. The structure is 30 ft (9.1 m) long and 15 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Carries638 HWY
CrossesLittle Trout River
Location0.5 MI W of US-23
RouteCounty Highway 0
Coordinates45.33467, -83.68475
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure3 SeriousLoss of section, deterioration, spalling or scour have seriously affected primary structural components.
Substructure2 CriticalAdvanced deterioration of primary structural elements. Bridge may be closed until corrective action is taken.
Channel and channel protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusClosed to all traffic
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation0: Immediate repair necessary to put back in service
Waterway adequacy3: Basically intolerable, requiring high priority of corrective action
Approach roadway alignment3: Basically intolerable, requiring high priority of corrective action
Operating rating7.2 US tons
Inventory rating5.4 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length30 ft (9.1 m)
Longest span28 ft (8.5 m)
Deck width15 ft (4.7 m)
Roadway width15 ft (4.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic30 (2013)
Projected traffic545 by 2033
Trucks0%
Lanes on structure2
Traffic directionOne-lane bridge for two-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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$557,000
NavigationNo navigation control on waterway

Frequently asked questions

When was 638 HWY over Little Trout River built?

It was built in 1930, making it 95 years old in 2025.

What condition is 638 HWY over Little Trout River 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 September 2023.

How much traffic does 638 HWY over Little Trout River carry?

About 30 vehicles per day (2013 count).

How long is 638 HWY over Little Trout River?

The structure is 30 ft (9.1 m) long with a longest span of 28 ft (8.5 m) and a deck 15 ft wide.

Who owns 638 HWY over Little Trout River?

It is owned by the County Highway Agency.