Georgia Porsche Cars North America Inc. is planning to build a new headquarters at Aerotropolis, a 130-acre mixed-use development near Hartsfield-Jackson Atlanta International Airport. The project will involve a 26-acre campus that will include a 150,000-sq-ft office tower. The development will feature a classic Porsche restoration shop, a restaurant and a 1.6-mile driving circuit, with off-road and on-road courses that visitors can use to test-drive Porsche 911s. Being developed by Jacoby Group, Aerotropolis is a 160-acre, aviation-intensive business district that is expected to include 2.1 million sq ft of offices, hotels and retail on the former Ford Hapeville plant site. The estimated construction cost is $100 million. Porsche Cars North America Inc., 980 Hammond Dr., Atlanta, 30328.

Virginia The Rivanna Water & Sewer Authority is proposing to build a new earthen dam to replace an existing 1908 cyclopean concrete dam supported by an earthen buttress built in the 1930s. The structural height of the new dam will be approximately 125 ft tall, built to support an increase in the Ragged Mountain Reservoir pool height of 30 feet. The foundation and the crest of the dam will be built to allow for the future addition of 12 ft to the pool height. Designed by Schnabel Engineering, the new earthen dam has various safety features, including a tunnel separated from the dam structure for the primary spillway and water-supply piping as well as an emergency spillway remote from the dam structure. The construction job, which is projected to take two years, is expected to be bid in late summer and start this fall. The estimated construction cost is between $15.7 million and $19.2 million. Rivanna Water & Sewer Authority, 695 Moores Creek Ln., Charlottesville, 22902.

Contracts/Bids/Proposals

California The Desert Community College District has selected Sundt Construction to provide construction management-at-risk services for the 119-acre West Valley campus of the College of the Desert in Palm Springs. The project entails construction of a holistic operating campus compatible with the desert ecology. The goal of the project is to achieve net-zero energy use and waste-neutrality. The first phase of construction, which will start in September 2011, will encompass infrastructure, roadways, parking lots shaded by photovoltaic panels and a 50,000-sq-ft building containing classrooms and lab space. The first phase of construction is expected to be completed in 2014. The estimated ultimate construction cost is $346 million. Sundt Construction, 1660 Hotel Circle North, Suite 400, San Diego, 92108.

Texas Texas A&M University, Galveston, has tapped PGAL for architectural and engineering services for its new 185,000-sq-ft, 588-bed student housing complex. Required work includes landscapingand storm-drainage design. The project also includes packed terminal air conditioners and heat pumps. The estimated construction cost is $21.8 million. PGAL, 3131 Briarpark, Suite 300, Houston, 77042.

Utah The Davis School District has selected Hogan & Associates Construction to provide construction management and general contracting services for the 70,000-sq-ft, two-story Wasatch Elementary School and Clearfield Community Center. The project includes relocation of Clearfield City Central Park. The construction cost has been estimated at $10.5 million. Hogan & Associates Construction, 940 N. 1250 West, Centerville, 84014.

Bid/Proposal Dates

Alabama 6/1 The U.S. Army Corps of Engineers, Mobile District, is seeking qualifications for indefinite-delivery, indefinite-quantity (IDIQ) design-build services for new construction and repairs of parking lots, infrastructure, water distribution and wastewater collection as well as buildings throughout Alabama, Mississippi, Tennessee, Florida, Georgia, North Carolina and South Carolina. Buildings include Group Support Battalion (GSB) logistic, a 34,268-sq-ft GSB tactical equipment maintenance facility, a GSB organization equipment storage facility, a 4,485-sq-ft GSB oil storage facility, a GSB hazardous-materials storage facility and a wash rack/platform. The term of this contract will be for a base year and four 12-month options. The estimated construction cost is between $250 million and $500 million. U.S. Army Corps of Engineers, Mobile District, 109 Saint Joseph St., Mobile, 36628. DR#11-00425951.

Texas 6/1 The U.S. Dept. of Transportation, Office of Maritime Administration, is seeking proposals for design-build services for a layberth facility for eight ships at the site of the Beaumont Reserve Fleet. The project includes dredging, pier construction, utility services, an access road, parking and security. The construction cost has been estimated to be between $25 million and $35 million. U.S. Dept. of Transportation, 1200 New Jersey Ave., S.E., W28-201, Washington, D.C. 20590.

New York 6/3 The City of Rochester, Bureau of Architecture and Engineering Services, is seeking proposals for design and scoping services for a new intermodal transit facility and boarding platform at the Amtrak train station. The required work will include surveying and assessment of other sites as well as an environmental review. The construction cost has been estimated at $20 million. City of Rochester, Bureau of Architecture and Engineering Services, 30 Church St., Room 30B, Rochester, 14614.