THE CONCRETE BRIDGE MAGAZINE

WINTER 2018

ASPIRE is a quarterly magazine published by PCI in cooperation with the associations of the National Concrete Bridge Council. The editorial content focuses on the latest technology and key issues in the Concrete Bridge Industry.

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ASPIRE Winter 2018 | 51 S TAT E M i ssissippi is a state built on concrete structures. Of the state's 16,596 bridges, the Mississippi Department of Transportation ( M D OT ) m a n a g e s a n d m a i n t a i n s 5 7 7 5 . A p p r ox i m a t e l y 8 8 % o f t h e s e b r i d g e s a r e constructed with concrete superstructures. To widen and replace state-owned bridges, MDOT uses American A ssociation of State Highway and Transportation Officials (AASHTO) prestressed concrete girder shapes along with bulb-tee girders . The locally owned bridge system rel ies mainly on precast concrete channel-beam bridges for short-span structures. Mississippi has three precast , prestressed concrete facilities capable of producing voided- slab spans, AASHTO girders, Louisiana girders, Florida girders, Northeast Extreme Tee (NEXT) beams, and prestressed concrete piling. The state has two additional facilities capable of casting reinforced (nonprestressed) concrete channel beams and aesthetic panels. A robust concrete industry , coupled with the desire to be innovative and create an active working relationship among the departments of transportation (DOTs) of the Gulf South Region , has helped keep a large variety of precast concrete elements cost-effective. The Gulf South Precast Concrete Association (GSPCA) was founded in 1961 to promote precast, prestressed concrete elements for the transportation systems in Alabama, Louisiana, and Mississippi. In 2016, GSPCA reorganized to form PCI Gulf South, a chapter of the Precast/ Prestressed Concrete Institute. PCI Gulf South expanded its role with DOTs by forming a regional transportation committee composed of members from the Alabama, Louisiana, and Mississippi DOTs, industr y, educational institutions, and consultants. Through collaboration with PCI Gulf South, MDOT continues the expansion of concrete technology and standardization today. The relationship has helped MDOT expand the use of concrete elements such as Florida I-beams (FIB), Mississippi by Justin Walker, Scott Westerfield, and Michael Flood, Mississippi Department of Transportation On February 17, 2016, after a routine inspection indicated significant scour on the southeast corner of the bridge located on Robinson Road in Jackson, Miss., the bridge was closed for nearly a year while plans were developed and funding was acquired. A new bridge was constructed with precast, prestressed concrete Florida I-beams and a cast- in-place deck. It opened to traffic on September 1, 2017. All Photos: Mississippi Department of Transportation.

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