Location: Martinez, CA
Time Frame: 2011

The residents of Martinez celebrated the grand opening of their new municipal pools summer 2011. A 2008 Measure H Park Improvement identified the Rankin Park Municipal Pools renovation project. The new pools are concrete with a plaster finish. The lap pool provides 8-lane 25-yard recreation and competition swimming with a 1-meter springboard diving alcove. The adjacent freeform 3,800 sq ft multi-use recreation pool provides warmer water with an interactive play structure for the children and an area for adult therapy, aqua aerobics, and children’s learn-to-swim lesson programming.

Scope of Services

Geotechnical investigation to identify site geology and surficial soil conditions to provide recommendations for site grading, foundations design and construction criteria for retaining walls and swimming pools.
Structural engineering design of the deck level gutter recreation and competition pools with associated surge tanks.
Material Testing and Inspection services for the duration of the project including: grading control, compaction testing, reinforcement, shotcrete, concrete, welding, masonry, mortar, and grout testing.
Challenges:

Expansive clay soils that were wet due to the removal of the old exisitng pools and excessively wet winter construction conditions.

Clay soils were aerated and processed to achieve optimum moisture content. Where site conditions and weather did not allow for further processing, the sub-grade soils were treated with lime to stabilize the soils and seal the sub-grade against wet weather. Lime treatment of the soil allowed construction to remain on schedule which resulted in considerable cost savings. In addition, NOA having been retained as the project Geotechnical Engineer of Record and Testing and Inspection Agency, and pool shell structural engineer, allowed NOA to streamline communication channels and seamlessly adapt and resolve issues that arose during construction in a timely manner.

Budget cost overruns were experienced as a result of difficult soils and unusually wet weather conditions. Due to NOA’s integrated project management system, NOA was able to provide real-time budget information to identify causes and assist with projecting project anticipated cost outcomes for the remainder of construction.