US Bridges

Mariaville RD over W.Br. Union River

Good

Hancock County, Maine · 4 MI So Townline · Structure no. 3562

Built
2017
8 years old
Condition
Good
inspected July 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
183 ft
3 main spans
Daily traffic
221
2016 count
Owner
State
State Highway Agency

About this bridge

Mariaville RD over W.Br. Union River is a steel continuous stringer/multi-beam or girder carrying Mariaville RD over W.Br. Union River in Hancock County, Maine. It was built in 2017, so it is 8 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.

It carries about 221 vehicles a day, roughly 5% of them trucks, projected to reach 354 by 2036. The structure is 183 ft (55.7 m) long and 29 ft wide. If it were closed, the detour would be 16.2 mi (26 km).

Location

Open in Google Maps
CarriesMariaville RD
CrossesW.Br. Union River
Location4 MI So Townline
RouteCounty Highway 181
CountyHancock County
StateMaine
Coordinates44.76416, -68.3864
Functional classRural Minor Collector

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 protection8 Very GoodNo problems noted.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating58.5 US tons
Inventory rating45.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadGreater than HL 93
Structure length183 ft (55.7 m)
Longest span68 ft (20.7 m)
Deck width29 ft (8.9 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic221 (2016)
Projected traffic354 by 2036
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed16.2 mi (26 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 W.Br. Union River built?

It was built in 2017, making it 8 years old in 2025.

What condition is Mariaville RD over W.Br. Union River 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 Mariaville RD over W.Br. Union River carry?

About 221 vehicles per day (2016 count), of which roughly 5% are trucks.

How long is Mariaville RD over W.Br. Union River?

The structure is 183 ft (55.7 m) long with a longest span of 68 ft (20.7 m) and a deck 29 ft wide.

Who owns Mariaville RD over W.Br. Union River?

It is owned by the State Highway Agency.