Structure L160030M6MUNNBI · Hampden County, MA

HWY Miller ST over Water Chicopee River

Carries HWY Miller ST over Water Chicopee River, At Wilbraham Line.

Overall conditionFair

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

How ratings work
Deck6/9 · Satisfactory
Superstructuresets the rating5/9 · Fair
Substructure6/9 · Satisfactory
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT379 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9Superstructure 5/9 · sets the ratingSubstructure 6/9

379 ft end to end: about 5 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 through truss.

Built1939rebuilt 2006
Length378.9 ft115.5 m
Daily traffic15,000counted 2024
Last inspectedNovember 2024every 24 months

Location

StateMassachusetts
CountyHampden
LocationAt Wilbraham Line
CarriesHWY Miller ST
CrossesWater Chicopee River
Coordinates42.15690, -72.42343

Physical Characteristics

MaterialSteel
DesignTruss - Thru
Total Length378.9 ft (115.5 m)
Max Span319.9 ft (97.5 m)
Deck Width40.0 ft (12.2 m)
Deck Area1409.1 sq m
Main Spans1
Year Built1939 (reconstructed 2006)

Traffic

Avg Daily Traffic15,000 (2024)
Truck Traffic3%
Lanes On Bridge2

Inspection & Ownership

Last InspectionNovember 2024
Inspection FrequencyEvery 24 months
OwnerTown/Township Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical4 — Foundations need monitoring
Structure NumberL160030M6MUNNBI

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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