TSFGeo provided geotechnical engineering services for the project which includes the design of a shared use path (Central Railroad Corridor Greenway (CRCG) trail) from west of I-95 to North County Park in Indian River County. The project alignment is about 2 miles and includes a pedestrian overpass over I-95, MSE walls at the bridge approach, and the installation of a CCTV pole at the I-95 Northbound on-ramp from CR-512 (Fellsmere Road). The purpose of the study was to provide Geotechnical (i.e. soils and groundwater) input to the design team to assist in the evaluation of the merits of the potential roadway (trail) reconstruction, CCTV pole installation, and pedestrian overpass and associated MSE walls. The study was performed to obtain information on the existing subsurface conditions along the project alignment to assist in the design and preparation of construction plans for the proposed construction, to identify the general subsurface stratigraphy and provide geotechnical recommendations to guide design and pole installation; and design and construction of the bridge and MSE wall. Fieldwork included SPT borings. Collected bulk soil samples from the project site and delivered them to FDOT State Materials Office in Gainesville to perform Resilient Modulus (MR) tests. Reviewed readily available published topographic and soils information obtained from the “Soil Survey of Indian River County, Florida” published by the United States Department of Agriculture (USDA) Natural Resources Conservation Services (NRCS), and USGS Maps.

Classified soil samples using the AASHTO Soil Classification System and performed laboratory testing to establish the soil properties which included grain size analysis, moisture content and organic determination, Atterberg Limit tests, and corrosion tests. All Geotechnical Services were performed in general accordance with FDOT’s Soils and Foundations Handbook (2014/2015). Provided Geotechnical Engineering Evaluations and Recommendations regarding Plastic and Organic Soils, Permanent Cut and Fill Slopes, Excavations, Groundwater Control, Pavement Design Considerations, On-Site Soil Suitability, and design and installation of the CCTV pole. Additionally, TSFGeo performed pile capacity analyses and external and global stability analyses for MSE walls and provided geotechnical recommendations for the design and construction of the proposed bridge and walls.

The project was completed on time and within budget.