Download - Project 5 cooper river bridge 092210
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Project 5Cooper River (Arthur Ravenal Jr.) Bridge
Charleston-Mt. Pleasant, South Carolina
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Project
Spans 2½ miles including ship channel
Replace, increase capacity of 1929, 1966 bridge pair
Weight-limited (structural deterioration)
Congested
High maintenance
Provide 8 lanes
Obsolete design criteria
No shoulder, medians
Steep grades10 foot lanes
Insufficient vertical clearance over ship channel
Improve interchanges on bridge approaches
Source: http://maps.google.com/
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Project
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Replace one 2-lane and one 3-lane bridge with an 8-lane bridge and improve connections to I-26 and local roads.
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CSS Approach Agency partnership
State infrastructure bank SCDOT Charleston County South Carolina State Port Authority FHWA
Proactive partnership with community Compatibility Environmental mitigation Design input Expedited environmental permitting
Other features Public work sessions Public outreach campaign Collaboration with other agencies, citizens, stakeholders Citizen vote on bridge tower design
Photo source: http://ravenelbridge.net/small/jul_12_bridge_south_blog.jpg
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CSS Design Features Sensitivity to community features Aesthetic treatments
Decorative lighting
Hand rails
Light poles
Citizen approved tower design 12 foot ped/bike path Scenic overlooks Rock islands at tower bases (prevent damage by ship) Decorative lighting (off during turtle season) Relocation of some displaced trees Parks, open space in old bridge alignment
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Source: http://www.gcbl.org/system/files/cooper_river_thumb_0.jpg
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CSS Design Features (cont.)
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Longest cable-stayed bridge in North America. Highest cost public works project in South Carolina history. Source: Google Earth
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CSS Design Features (cont.)
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West (left) and east approaches and interchanges. Source: Google Earth
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CSS Design Features (cont.)
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West approach during late construction phase. Source: http://www.ravenel.net
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CSS Design Features
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Source: http://www.freyssinetusa.com/images/freyssinet/lightbox/stay_cable_1.jpg