US Bridges

Mariaville RD over Tannery Brook

PoorPosted for load

Hancock County, Maine · 4.5 MI S Townline · Structure no. 3511

Built
1937
88 years old
Condition
Poor
inspected July 2024
Type
Slab
Concrete
Length
26 ft
1 main span
Daily traffic
688
2016 count
Owner
State
State Highway Agency

About this bridge

Mariaville RD over Tannery Brook is a concrete slab carrying Mariaville RD over Tannery Brook in Hancock County, Maine. It was built in 1937, so it is 88 years old, older than the Maine average of 53.7 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 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 688 vehicles a day, roughly 5% of them trucks, projected to reach 1,101 by 2036. The structure is 26 ft (7.9 m) long and 25 ft wide. If it were closed, the detour would be 29.2 mi (47 km).

Location

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CarriesMariaville RD
CrossesTannery Brook
Location4.5 MI S Townline
RouteCounty Highway 181
CountyHancock County
StateMaine
Coordinates44.70109, -68.41294
Functional classRural Minor Collector

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
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating22.2 US tons
Inventory rating17.2 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 15
Structure length26 ft (7.9 m)
Longest span23 ft (7 m)
Deck width25 ft (7.6 m)
Roadway width22 ft (6.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic688 (2016)
Projected traffic1,101 by 2036
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed29.2 mi (47 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
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 Mariaville RD over Tannery Brook built?

It was built in 1937, making it 88 years old in 2025.

What condition is Mariaville RD over Tannery Brook 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 July 2024.

How much traffic does Mariaville RD over Tannery Brook carry?

About 688 vehicles per day (2016 count), of which roughly 5% are trucks.

How long is Mariaville RD over Tannery Brook?

The structure is 26 ft (7.9 m) long with a longest span of 23 ft (7 m) and a deck 25 ft wide.

Who owns Mariaville RD over Tannery Brook?

It is owned by the State Highway Agency.