U.S. Navy Turning Basin
Our hydrographic surveyors conducted a hydrographic/bathymetric survey of 15 acres at the eastern end of Key West Bight in Key West, Florida. We were a subcontractor to Appledore Marine, who was contracted by the U.S. Navy. This project included establishing horizontal (NAD 83/99) and vertical (NGVD 29) control on the site and the location of piers and seawalls adjacent to the bight. A hydrographic survey was produced with one foot contour intervals of the bottom in hardcopy and digital (AutoCAD) format. The final deliverables included the hydrographic contour map overlaid onto scaled aerial photograph in color. The survey was used for preparing a scope of services to dredge the bight and to repair piers and seawalls
Fishermen?s Village Yacht Basin
Johnson Engineering obtained the ERP and federal dredge and fill permits and subsequent permit modifications. Our surveyors prepared hydrographic and bathymetric surveys and cross-sectional drawings of the marina basin which were used to determine the volume of material to be dredged. Hydrographic and bathymetric surveys were performed post-dredging to reconcile any differences in the amount initially determined to be removed versus the amount actually removed because payment was based on the volume of material removed. The work also involved setting up bench marks, establishing horizontal and vertical control, locating existing pertinent site features, and locating the mean high water line. The project ecologist conducted biological surveys of submerged lands to identify any potential areas of sea grasses or other marine resources. Our water resources group conducted water quality and sediment sampling and analyses as required by FDEP and we prepared the construction plans for the project. A revised sovereign, submerged lands lease was also completed for the project.
Harborview Road Surveys
Our surveyors completed upland boundary and topographic surveys on a 402-acre parcel adjacent to the Peace River. A hydrographic survey was also conducted in 113 acres of canals within the upland parcel and on portions of the Peace River adjacent to the parcel shoreline. A one foot contour interval was required for the Peace River portion of the survey and a half foot contour interval was required for the canals. The mean high water line was located for the project. The upland topography and the hydrographic data were combined to provide a boundary and topographic survey for future site development and to assess potential dredging needs in the canal and Peace River.
Magnolia Landing Lakes Bathymetric Surveys
Our surveyors obtained ground elevations for over 17 areas where lakes were to be dug for a golf course community for Taylor Woodrow at Magnolia Landing. Once the lakes were excavated, hydrographic surveys were prepared for each of the 17 lakes and the volume of material removed was also calculated for each lake. Side slopes of the lake were calculated to ensure they met design standards. The data was obtained using 14 foot aluminum Jon boats with a 15 horsepower Yamaha outboard motors, Trimble 5800 GPS (Global Positioning System), an Odom HT 100 survey grade depth recorder and Hypack Max software running on a Panasonic Toughbook laptop computer. This project was completed in January of 2006.
