Craig A. Smith & Associates Bid Document (36)

Home Browse Search

www.craigasmith.com targeted SLR elevation. At the forefront of all, is the necessity to implement public outreach efforts to the residents of the community regarding such proposed drainage improvements. Current Drainage Issues • Overwhelmed Stormwater Capacity: Heavy downpours regularly swamp the low-lying barrier island, prompting local emergency declarations due to surface water accumulation. • Subsurface Degradation: Aging drainage lines and deep injection/drainage wells introduce brackish water mixes into porous limestone, weakening underground support and causing reverse drainage. • Soil Compaction and Sinking: High-density building weight and intensive construction pile-driving (averaging towers over 600 feet tall) have accelerated ground subsidence, with select luxury high- rises sinking up to 3 inches—leading to warped subterranean parking levels and misaligned pipes. Municipal Challenges and Mitigations • Central Island Drainage Project: The city is actively upgrading infrastructure by converting 10 existing drainage wells into pressurized wells to expand capacity between 174th and 183rd Streets. • System Maintenance: Public Works routinely services the city’s network (including 170 manholes, 390 catch basins, and 50 wells) and deploys portable pumps ahead of king tides and major storms. • Development Pressures: Balancing continuous real estate growth with strict National Pollutant Discharge Elimination System (NPDES) environmental rules remains difficult as dense paving prevents natural rainwater absorption. The City may authorize assignments ranging from planning studies, surveys, and utility investigations to roadway, stormwater/drainage, water/sewer utility, structural, and construction engineering projects for the professional categories submitted. CAS has successfully delivered similar continuing services assignments for municipalities throughout Miami-Dade, Broward, and Palm Beach Counties and understands that timely responsiveness, flexibility, and proactive coordination are essential to the success of a continuing services contract. Over the years, our team has developed an understanding of the City's infrastructure, permitting processes, design standards, and project delivery expectations through both completed and ongoing assignments. Figure 2-1 (attached) illustrates CAS's typical project delivery process. Each assignment begins with a collaborative review of the City's objectives, existing conditions, available records, and project constraints. In-house surveying and subsurface utility engineering services—including records research, Sunshine 811 coordination, electromagnetic designation (EMD), ground penetrating radar (GPR), 3D radar tomography (RT), and vacuum soft digs—are integrated early in the process to develop accurate utility basemaps before engineering design begins. This integrated approach minimizes utility conflicts, reduces unforeseen field conditions, improves design accuracy, and helps reduce construction change orders. Multiple quality assurance and quality control reviews are incorporated throughout each stage of design to ensure the accuracy and completeness of project deliverables before progressing to the next phase. Final engineering documents are then prepared for permitting, bidding, and construction. Because CAS performs civil engineering, surveying and mapping, subsurface utility engineering, utility locating, CADD, and construction management with experienced in-house staff, project activities can occur concurrently rather than sequentially. This integrated project delivery model reduces coordination time between subconsultants, accelerates project schedules, improves communication, and provides the City with a single point of responsibility throughout every assignment. 9