Client: Jensen, Yorba, Lott, Inc.
Owner: City of Petersburg
Cost of Work: $8 million

PND provided geotechnical, site/civil and structural design, and full-time contract administration and construction inspection for a two-story, 22,000-sq-ft structure housing a 25-meter, six-lane lap pool, a leisure pool with water slide, and a mezzanine with spectator seating.

The pile-supported, reinforced concrete foundation takes into account poor soils. A soft sandy layer and peat layer are under a layer of man-placed gravel. Steel piles driven to firm bearing strata ensure performance.

The structural system consists of exterior pre-cast concrete wall panels and tubular steel columns supporting steel roof trusses, tubular steel roof purlins and an acoustic steel deck. The mezzanine structure consists of pre-cast, pre-stressed hollow core panels supported by exterior pre-cast wall panels and interior concrete masonry unit walls. Concrete wall panels and tubular steel bracing provide the lateral load-resisting system. Structural elements address a high-chlorine, humid environment. Steel framing contained few square edges that stress the protecting paint. CMU and pre-cast wall panels have few exposed elements subject to corrosion.

Site/civil design included extension of city sewer lines, relocation of a free-standing radio tower, relocation of radio station satellite dishes, pool drain line with outlet in existing natural drainage, buried water and storm drain piping, sidewalks, and expansion and resurfacing of existing parking lot. Construction was completed in 2006.