INVITATION TO BID 24-07-01 CONSTRUCTION OF INTRACOASTAL SPORTS PARK

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Mr. Mark Castano, P.E. February 21, 2024 Keith & Associates, Inc. . Page 1 Geotechnical Study – Intra Coastal Sports Complex – 15800 Collins Avenue NV5 Project No.: 17990 CONSTRUCTION QUALITY ASSURANCE - INFRASTRUCTURE - ENERGY - PROGRAM MANAGEMENT - ENVIRONMENTAL 1.0 SITE AND PROJECT INFORMATION The project site is located on the northwestern corner of the intersection of Collins Avenue and 158th Street in Sunny Isles Beach, Florida. A site vicinity map is presented on Drawing 1. According to the Miami-Dade County Property Appraiser’s webpage, the site corresponds to folio numbers 31-2214- 004-0180 and 31-2214-008-0071. It is bounded by a parking lot to the north, 158th Street to the south, Collins Avenue to the east, and by a parking lot and the Intracoastal Waterway to the west. The site comprises a rectangle measuring about 115 by 215 feet in plan and is presently vacant. We were not provided with site topographic information but estimate site grades to be on the order of +6 feet relative to the 1929 National Geodetic Vertical Datum (NGVD). We understand the site will be redeveloped with a park comprising a small welcome building with storage and restrooms, new asphalt paving and other hardscape, including multiple game courts, and new landscaping. Structural loads were not provided. We estimate column and wall loads to be on the order of 50 kips and 3 kips per linear foot, respectively. We assume ground floor slabs will be loaded to around 150 pounds per square foot. 2.0 PURPOSE AND SCOPE OF WORK The purpose of our services on this project is to explore the subsurface conditions in order to provide recommendations for foundation design and construction. Specifically, this report provides: ¨ Drawings showing boring locations, a graphic summary of the generalized subsurface conditions, and boring logs with detailed descriptions of the materials encountered. ¨ Discussion of generalized subsurface conditions at the site including groundwater levels and hydraulic conductivity. ¨ Discussion of feasible foundation type(s) for the proposed construction. ¨ Design parameters for the recommended foundation types, including vertical and lateral load resistance. ¨ Estimates of foundation settlements. ¨ Recommendations for site preparation and grading, including the re-use of site-excavated materials for fill, fill placement and compaction, and slab subgrade preparation. ¨ Construction considerations including excavation support and dewatering, existing structure foundations, and impacts for adjacent structures. 3.0 FIELD EXPLORATION Our field exploration consisted of performing test borings and a field permeability test as described below. The test locations depicted on Drawing 1 were marked and identified in the field by NV5. It should be noted that the test locations shown are approximate. If accurate as-built test locations are required, they should be surveyed. The test data reported herein reflect our interpretation of conditions at the specific test locations only, and at the time the tests were performed. 3.1 BORINGS Two (2) test borings were drilled for this project to 27 and 35 feet below existing grade. The borings were drilled in accessible locations with a truck-mounted drill rig utilizing the rotary wash method.