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Alton Sylor Memorial Bridge over Joncy Gorge

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Click on image for larger photo

Bridge Data


Total Bridge Length
274.10' (3 Span) - Longest Clearspan Timber Arch in the Nation
Span 1 & 3 - 52.025' Each
Span 2 - 170.05'
Total Roadway Width - 30.18'
Total Out-To-Out Width - 32.10'
Deck Panel Tichness - 10.75''


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Click image for larger photo

Roadway Elevation to Stream Channel Elevation - 39' High

Board FootageSubstructure Arches/Columns/Vertical Bracing84,287
SuperstructureFloor Beams/ Deck/ Railing 141,302
Total225,589

Weight of Main Arches
(Span 2)

32 Tons of Timber
7 Tons of Steel & Connectors
39 Tons Each


Superstructure
500
Tons of Timber and Steel
250
Tons of Blacktop
750
Total Tons

Substructure
39.58
Tons of Rebar
892.50
Cubic Yards of Concrete



Cost: $3,348,796
Federal Share80%$2,679,036.80
State Share15%$ 502,319.40
County Share4.25%$ 142,323.83
Town of Angelica Share0.75%$ 25,115.97

Timber Arch Manufacturer: Unadilla Laminated Products
Contractor: A.L. Blades & Sons, Inc.
Owner: Town of Angelica
Project Designer: Dewberry-Goodkind, Inc.
Project Coordinator: Allegany County Department of Public Works

Opened 6-25-2003



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