US Bridges

Mill RD over Royal River

Fair

Cumberland County, Maine · 1.2 MI W JCT 231 · Structure no. 6156

Built
1969
56 years old
Condition
Fair
inspected July 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
74 ft
1 main span
Daily traffic
1,240
2016 count
Owner
State
State Highway Agency

About this bridge

Mill RD over Royal River is a steel stringer/multi-beam or girder carrying Mill RD over Royal River in Cumberland County, Maine. It was built in 1969, so it is 56 years old, older 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 1,240 vehicles a day, roughly 5% of them trucks, projected to reach 1,860 by 2036. The structure is 74 ft (22.7 m) long and 31 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesMill RD
CrossesRoyal River
Location1.2 MI W JCT 231
RouteCity Street 0
CountyCumberland County
StateMaine
Coordinates43.86774, -70.26072
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 inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating58.2 US tons
Inventory rating45 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadH 20
Structure length74 ft (22.7 m)
Longest span70 ft (21.2 m)
Deck width31 ft (9.5 m)
Roadway width28 ft (8.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,240 (2016)
Projected traffic1,860 by 2036
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Mill RD over Royal River built?

It was built in 1969, making it 56 years old in 2025.

What condition is Mill RD over Royal River 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 July 2023.

How much traffic does Mill RD over Royal River carry?

About 1,240 vehicles per day (2016 count), of which roughly 5% are trucks.

How long is Mill RD over Royal River?

The structure is 74 ft (22.7 m) long with a longest span of 70 ft (21.2 m) and a deck 31 ft wide.

Who owns Mill RD over Royal River?

It is owned by the State Highway Agency.