Structure B1701945LDOTNBI · Barnstable County, MA

ST 28 Bourne Br RD over US 6

Carries ST 28 Bourne Br RD over US 6, 190ft N Of Bourne Bridge.

Overall conditionFair

Set by its lowest-rated component: Superstructure at 6 of 9.

How ratings work
Deck7/9 · Good
Superstructuresets the rating6/9 · Satisfactory
Substructure7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT153 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 6/9 · sets the ratingSubstructure 7/9

153 ft end to end: about 2 semi-trucks nose to tail. 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.

Built198541 years old
Length152.9 ft46.6 m
Daily traffic41,801counted 2022
Last inspectedOctober 2023every 24 months

Location

StateMassachusetts
CountyBarnstable
Location190ft N Of Bourne Bridge
CarriesST 28 Bourne Br RD
CrossesUS 6
Coordinates41.75182, -70.59223

Physical Characteristics

MaterialSteel
DesignStringer/Multi-beam
Total Length152.9 ft (46.6 m)
Max Span149.9 ft (45.7 m)
Deck Width54.8 ft (16.7 m)
Deck Area778.2 sq m
Main Spans1
Year Built1985

Traffic

Avg Daily Traffic41,801 (2022)
Truck Traffic14%
Lanes On Bridge4
Lanes Under Bridge4

Inspection & Ownership

Last InspectionOctober 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure NumberB1701945LDOTNBI

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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