Structure 2016 · Cumberland County, ME

Main ST over Androscoggin River

Carries Main ST over Androscoggin River, .2 Mi N US 1.

Overall conditionPoor

Set by its lowest-rated component: Deck at 3 of 9.

How ratings work
Decksets the rating3/9 · Serious
Superstructure4/9 · Poor
Substructure5/9 · Fair
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT803 FT OVERALL100 FT0ELEVATION · LENGTHS TO SCALE
Deck 3/9 · sets the ratingSuperstructure 4/9Substructure 5/9

803 ft end to end, longest span 315 ft: about 2.2 football fields. Lengths and the semi-truck on the deck are drawn to the same scale. Each part is colored by its latest inspection rating. The inventory records lengths but not heights or the layout of the shorter spans, so those are drawn as typical for a through truss.

Built1931rebuilt 1985
Length802.8 ft244.7 m
Daily traffic16,790counted 2016
Last inspectedOctober 2024every 12 months

Location

StateMaine
CountyCumberland
Location.2 Mi N US 1
CarriesMain ST
CrossesAndroscoggin River
Coordinates43.92110, -69.96581

Physical Characteristics

MaterialSteel
DesignTruss - Thru
Total Length802.8 ft (244.7 m)
Max Span314.6 ft (95.9 m)
Deck Width30.8 ft (9.4 m)
Deck Area2300.2 sq m
Main Spans3
Year Built1931 (reconstructed 1985)

Traffic

Avg Daily Traffic16,790 (2016)
Truck Traffic5%
Lanes On Bridge2

Inspection & Ownership

Last InspectionOctober 2024
Inspection FrequencyEvery 12 months
OwnerState Highway Agency
Historical SignificanceBridge is eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number2016

How Bridge Ratings Work

Inspectors rate each major part of a bridge (the deck you drive on, the superstructure of beams that holds it up, and the substructure of piers and abutments beneath) on a 0–9 scale. A bridge's overall condition is its lowest of those ratings, so one deteriorated component makes the whole bridge "poor."

0Failed
1Imminent failure
2Critical
3Serious
4Poor
5Fair
6Satisfactory
7Good
8Very good
9Excellent
Good · lowest component 7–9
Fair · lowest component 5–6
Poor · lowest component 0–4

A poor rating is not a closure. It means the bridge is flagged for priority repair or replacement; bridges judged unsafe are closed or posted with weight limits. The waterway (channel) rating is reported, but it does not count toward the overall classification.

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