US Bridges

Mill Hill RD over Martin Stream

PoorPosted for load

Androscoggin County, Maine · 0.4 MI N JCT RTE 4 · Structure no. 2622

Built
1930
95 years old, rebuilt 1963
Condition
Poor
inspected October 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
58 ft
1 main span
Daily traffic
1,193
2016 count
Owner
State
State Highway Agency

About this bridge

Mill Hill RD over Martin Stream is a steel stringer/multi-beam or girder carrying Mill Hill RD over Martin Stream in Androscoggin County, Maine. It was built in 1930 and reconstructed in 1963, so it is 95 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 1,193 vehicles a day, roughly 5% of them trucks, projected to reach 1,790 by 2036. The structure is 58 ft (17.7 m) long and 29 ft wide.

CarriesMill Hill RD
CrossesMartin Stream
Location0.4 MI N JCT RTE 4
RouteCity Street 0
StateMaine
Coordinates44.34015, -70.25395
Functional classRural Local

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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourScour critical; foundations unstable for calculated scour conditions
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 adequacy9: Superior to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating25.4 US tons
Inventory rating19.6 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadH 20
Structure length58 ft (17.7 m)
Longest span52 ft (15.9 m)
Deck width29 ft (8.8 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,193 (2016)
Projected traffic1,790 by 2036
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
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 Mill Hill RD over Martin Stream built?

It was built in 1930, making it 95 years old in 2025. It was reconstructed in 1963.

What condition is Mill Hill RD over Martin Stream 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 October 2024.

How much traffic does Mill Hill RD over Martin Stream carry?

About 1,193 vehicles per day (2016 count), of which roughly 5% are trucks.

How long is Mill Hill RD over Martin Stream?

The structure is 58 ft (17.7 m) long with a longest span of 52 ft (15.9 m) and a deck 29 ft wide.

Who owns Mill Hill RD over Martin Stream?

It is owned by the State Highway Agency.