V&A was retained by the Clark County Water Reclamation District to conduct condition assessment and rehabilitation design of two secondary clarifiers, a dissolved air flotation thickener facility, and the replacement of the waste activated sludge pumps at the Laughlin Water Reclamation Facility.
High O&M costs, corrosion issues and projected service life associated with the secondary clarifiers, and the dissolved air flotation thickener facility were the primary concerns of the project. In addition to the issues determined by the district, V&A conducted a thorough physical condition assessment of the facilities to determine if further rehabilitation was required for the facilities to meet the original design intent. V&A presented a design report documenting the condition assessment findings and associated recommendations for improvements, identified the design criteria, provided a preliminary estimate of probable construction costs.
V&A retained the services of a specialty contractor, Jamison Engineering, to assist in the confined space entries and to provide emergency rescue services. Condition assessment services provided by V&A included visual evaluation, concrete sounding and penetration tests, concrete pH sample collection, surface penetrating radar on reinforced concrete surfaces to determine depth and spacing of reinforcing steel, and concrete coring. For steel structures, V&A conducted visual evaluation, ultrasonic thickness testing, and broadband electromagnetic testing (BEM).
