US Bridges

Isleboro Ferry Sl. over Gilkey Harbor

Fair

Waldo County, Maine · End of SH 214 · Structure no. 6343

Built
2009
16 years old
Condition
Fair
inspected October 2023
Type
Movable - Lift
Steel
Length
81 ft
1 main span
Daily traffic
742
2016 count
Owner
State
State Highway Agency

About this bridge

Isleboro Ferry Sl. over Gilkey Harbor is a steel movable - lift carrying Isleboro Ferry Sl. over Gilkey Harbor in Waldo County, Maine. It was built in 2009, so it is 16 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.

It carries about 742 vehicles a day, roughly 5% of them trucks, projected to reach 1,187 by 2036. The structure is 81 ft (24.7 m) long and 12 ft wide. If it were closed, the detour would be 100 mi (161 km).

Location

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CarriesIsleboro Ferry Sl.
CrossesGilkey Harbor
LocationEnd of SH 214
RouteState Highway 0
CountyWaldo County
StateMaine
Coordinates44.28095, -68.94283
Functional classRural Major Collector

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 inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating52.9 US tons
Inventory rating40.7 US tons

Structure

Structure typeMovable - Lift
MaterialSteel
DeckOpen grating
Main spans1
Design loadHS 20
Structure length81 ft (24.7 m)
Longest span55 ft (16.8 m)
Deck width12 ft (3.8 m)
Roadway width11 ft (3.4 m)
Vertical clearance over deck15 ft (4.4 m)

Traffic and service

Average daily traffic742 (2016)
Projected traffic1,187 by 2036
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed100 mi (161 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 Isleboro Ferry Sl. over Gilkey Harbor built?

It was built in 2009, making it 16 years old in 2025.

What condition is Isleboro Ferry Sl. over Gilkey Harbor 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 October 2023.

How much traffic does Isleboro Ferry Sl. over Gilkey Harbor carry?

About 742 vehicles per day (2016 count), of which roughly 5% are trucks.

How long is Isleboro Ferry Sl. over Gilkey Harbor?

The structure is 81 ft (24.7 m) long with a longest span of 55 ft (16.8 m) and a deck 12 ft wide.

Who owns Isleboro Ferry Sl. over Gilkey Harbor?

It is owned by the State Highway Agency.