Structure 1398 · Aroostook County, ME

Dyer Brook RD over I-95 Northbound

Carries Dyer Brook RD over I-95 Northbound, Over I95 Mile 284.2.

Overall conditionFair

Set by its lowest-rated component: Substructure at 5 of 9.

How ratings work
Deck6/9 · Satisfactory
Superstructure6/9 · Satisfactory
Substructuresets the rating5/9 · Fair
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT129 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9Superstructure 6/9Substructure 5/9 · sets the rating

129 ft end to end. 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 multi-beam bridge.

Built197848 years old
Length128.9 ft39.3 m
Daily traffic560counted 2016
Last inspectedAugust 2024every 24 months

Location

StateMaine
CountyAroostook
LocationOver I95 Mile 284.2
CarriesDyer Brook RD
CrossesI-95 Northbound
Coordinates46.09801, -68.18567

Physical Characteristics

MaterialSteel
DesignStringer/Multi-beam
Total Length128.9 ft (39.3 m)
Max Span123.0 ft (37.5 m)
Deck Width36.7 ft (11.2 m)
Deck Area440.2 sq m
Main Spans1
Year Built1978

Traffic

Avg Daily Traffic560 (2016)
Truck Traffic5%
Lanes On Bridge2
Lanes Under Bridge2

Inspection & Ownership

Last InspectionAugust 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number1398

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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