US Bridges

Katahdin Loop Road over East Branch of Mud Brook

Fair

Penobscot County, Maine · 3.4 M South Swift Brook R · Structure no. 1709012P0000000

Built
2000
25 years old
Condition
Fair
inspected May 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
30 ft
1 main span
Daily traffic
5
2024 count
Owner
Federal
National Park Service

About this bridge

Katahdin Loop Road over East Branch of Mud Brook is a steel stringer/multi-beam or girder carrying Katahdin Loop Road over East Branch of Mud Brook in Penobscot County, Maine. It was built in 2000, so it is 25 years old, younger than the Maine average of 53.7 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. Its operating status is: open, posting recommended but not legally implemented.

It carries about 5 vehicles a day, projected to reach 10 by 2044. The structure is 30 ft (9.1 m) long and 15 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

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CarriesKatahdin Loop Road
CrossesEast Branch of Mud Brook
Location3.4 M South Swift Brook R
RouteFederal Lands Road 0
CountyPenobscot County
StateMaine
Coordinates45.8451, -68.72563
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 protection7 GoodSome minor problems.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, posting recommended but not legally implemented
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation3: Basically intolerable, requiring high priority of corrective action
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating5 US tons
Inventory rating3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckWood or timber
Main spans1
Design loadUnknown
Structure length30 ft (9.1 m)
Longest span27 ft (8.1 m)
Deck width15 ft (4.7 m)
Roadway width12 ft (3.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5 (2024)
Projected traffic10 by 2044
Trucks—
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed123.7 mi (199 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerNational Park Service
Maintained byNational Park Service
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 Katahdin Loop Road over East Branch of Mud Brook built?

It was built in 2000, making it 25 years old in 2025.

What condition is Katahdin Loop Road over East Branch of Mud Brook 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 May 2024.

How much traffic does Katahdin Loop Road over East Branch of Mud Brook carry?

About 5 vehicles per day (2024 count).

How long is Katahdin Loop Road over East Branch of Mud Brook?

The structure is 30 ft (9.1 m) long with a longest span of 27 ft (8.1 m) and a deck 15 ft wide.

Who owns Katahdin Loop Road over East Branch of Mud Brook?

It is owned by the National Park Service.