US Bridges

BIA Route 443 over Mountain Brook

GoodPosted for load

Penobscot County, Maine · 21.1 KM S Millnocket Me · Structure no. 0000S50018B0032

Built
2004
21 years old
Condition
Good
inspected July 2024
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
34 ft
1 main span
Daily traffic
30
2018 count
Owner
Federal
Bureau of Indian Affairs

About this bridge

BIA Route 443 over Mountain Brook is a wood or timber stringer/multi-beam or girder carrying BIA Route 443 over Mountain Brook in Penobscot County, Maine. It was built in 2004, so it is 21 years old, younger than the Maine average of 53.7 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. Its operating status is: posted for load restriction.

It carries about 30 vehicles a day, roughly 50% of them trucks, projected to reach 35 by 2044. The structure is 34 ft (10.3 m) long and 16 ft wide. If it were closed, the detour would be 11.2 mi (18 km).

CarriesBIA Route 443
CrossesMountain Brook
Location21.1 KM S Millnocket Me
RouteFederal Lands Road 443
StateMaine
Coordinates45.46297, -68.69506
Functional classRural Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating40.2 US tons
Inventory rating27.4 US tons

Structure

MaterialWood or Timber
DeckWood or timber
Main spans1
Design loadUnknown
Structure length34 ft (10.3 m)
Longest span34 ft (10.3 m)
Deck width16 ft (4.8 m)
Roadway width14 ft (4.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic30 (2018)
Projected traffic35 by 2044
Trucks50%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed11.2 mi (18 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerBureau of Indian Affairs
Maintained byBureau of Indian Affairs
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was BIA Route 443 over Mountain Brook built?

It was built in 2004, making it 21 years old in 2025.

What condition is BIA Route 443 over Mountain Brook in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in July 2024.

How much traffic does BIA Route 443 over Mountain Brook carry?

About 30 vehicles per day (2018 count), of which roughly 50% are trucks.

How long is BIA Route 443 over Mountain Brook?

The structure is 34 ft (10.3 m) long with a longest span of 34 ft (10.3 m) and a deck 16 ft wide.

Who owns BIA Route 443 over Mountain Brook?

It is owned by the Bureau of Indian Affairs.