Bathymetric & Hydrographic Surveys
Experience in hydrographic surveys, dredge materials measurement and payment surveys, DGPS surveys, river/harbor project clearance, underwater hazard detection.
We have a long history of performing hydrographic surveys in rivers, harbors and lakes. In 2004 and 2007 (and we were selected again for the upcoming 2010 work), we performed the automated hydrographic surveys for the Indiana Dunes Shoreline Protection Program projects for Army Corps (as a subconsultant to the construction companies placing the quantities). We have done hydrographic surveys for harbor improvements and dredging for Casino Pier in Chicago. We were chosen to perform an extensive survey to document the submerged property that is owned by the Chicago Park District. In support of dredging services, we created detailed DTMs of submerged surfaces for the BP Amoco Refinery Remediation in Whiting, IN. In addition to our work on lakes and harbors, we routinely perform hydrographic surveys in rivers like our work in obtaining hydraulic cross sections for the Prairie Parkway project. Several of our work orders for the Chicago District of the Army Corps required us to use automated hydrographic surveying to obtain river cross sections on larger bodies of water.
Our work on the Indiana Dunes Shoreline Protection Program in Michigan City, Indiana is an excellent example of our offshore beach profile and borrow disposal area surveys. We have been selected as the hydrographic surveying consultant several times (for several different contractors) on this project to take beach profiles from the beach placement of the sand to 3000’ to 3500’ lakeward past the water’s edge using a fathometer and DGPS positioning. These profiles were taken before and five days after placement of sand so that quantities and payment could be calculated.
ASE has the equipment necessary to perform these types of surveys. We have three boats ranging from 10’ to 20’ in length (with appropriate motors) that allow us to be able to work in many hydrographic surveying conditions, from small streams to the open waters of the great lakes. We also own a 25’ hydrographic survey vessel with cabin and trailer - it is a DGPS-equipped automated hydrographic survey vessel with an environment controlled cabin, capable of being trailered to and operating in U.S. inland and potentially coastal navigation projects for the automated acoustic surveys. We have the use of single beam fathometers (both Single-frequency and Dual-frequency Innerspace Technology Model 448 Fathometer or Echotrac 3200 and/or Mark III) and Seabat 8101 multibeam fathometers. We will use an Edgetech 4200 sidescan sonar, if necessary. We have the most current versions of HYPACK (HYPACK 2009), but we can provide deliverables in older versions if necessary (and HYSWEEP, if desired), but we can produce files in any software version that our clients may request. We have the equipment, experience and expertise necessary for any hydrographic surveying project that our clients may request us to do.
On all of our bathymetric surveys that require the use of fathometers, we use RTK GPS for the horizontal and vertical positioning of the vessel (to the extent that we are within cell phone range or the range of our radio base station transmitters). We are also able to use extended range RTK GPS or DGPS GPS horizontal and vertical positioning of the data. We are very accustomed to positioning precision. For the new I-74 Bridge over the Mississippi River, ASE was required to position barges carrying geotechnical boring equipment using RTK GPS.
In addition to the projects mentioned above, ASE has also done extensive bathymetric/hydrographic work on these selected projects:
· Hydrographic Surveys for New US 20 Bridge over Mississippi River at Dubuque, IA. ASE (as hydrographic surveying subconsultant to Parsons Transportation) performed typical flood plain and channel cross sections across the Mississippi River that were necessary for the design of the new bridge. All cross sections were obtained using fathometers linked to RTK GPS. In addition, ASE staked test piles and performed 50’X50’ 3-D topographic surveys around areas surrounding test pile locations as well as other surveying tasks.
· Lake Michigan Submerged Property Study, Chicago, IL. ASE researched the shoreline from Evanston border south to Ardmore Avenue. We compiled a Plat of Record showing line between private ownership and submerged lands belonging to the Chicago Park District. CADD files and a Surveyor’s Report were given indicating location and condition of lines between public and private property rights along the lakeshore. Control survey included a traverse along Sheridan Road and east into side streets with ground control for aerial photography. Project performed for Chicago Park District.
· Whiting Harbor Improvement, Whiting, IN. ASE performed Class I hydrographic/bathymetric survey for the lakeward portion of the Whiting Harbor Improvement to a maximum depth of -24 LWD with fathometers. Coordinates were based upon Indiana State Plane Coordinate System West Zone NAD 83 and any available Corps of Engineers control. ASE performed Real Time Kinematics GPS surveys using a base station on shore and a fathometer on a watercraft to produce 1-foot contours. Methodology conformed to US Army Corps of Engineering hydrographic surveying standards. ASE also located vegetation types, berms, dune lines, etc. Planimetrics were drafted in MicroStation using client CAD standards.
· Hydrographic Surveys for Chicago Shoreline Protection Project, Chicago, IL. ASE performed this project for Chicago Dept. of Environment involving data collection, topography and utility surveys. Topo to Third Order Class II accuracy, cross sections at 100-foot intervals perpendicular to existing shoreline using fathometer. Obtain elevations at 5-foot intervals along each cross section and at all breaks in grade, voids in shoreline structures, etc. Provide 3-D MicroStation files, plan view drawing and cross section drawings. Subconsultant for Montgomery Watson Harza.
· Ispat Inland Inc., Indiana Harbor Canal. Bathymetric surveys at Plant 1 Dock in East Chicago, Indiana, performed before and after dredging to determine the profile of canal bottom. Each survey approximately 1150 feet long from dockwall out 125 feet into canal, with soundings every 10 feet along survey lines. Coordinates presented as NAD 27 Indiana State Plane West coordinates. Provide ASCII file.
· Whiting Indiana Lakebed. Bathymetric survey from 2 feet deep to 18 feet deep, or 1200 feet from shore, whichever is less, in Whiting Park. Develop a series of soundings to model the lakebed and develop one-foot contours. Provide ASCII file to incorporate into DTM.
More examples of bathymetric/hydrographic surveying projects are available upon request.