Federal
HERBERT HOOVER DIKE
The Herbert Hoover Dike (HHD) surrounds Lake Okeechobee as part of a comprehensive flood control system in place in South Florida. CSI Geo, Inc. prepared a design documentation report for an approximately 7.3-mile section known as Reach 1, Subreach D, of the HHD.
CSI Geo staff provided geotechnical Quality Assurance (QA) and Independent Technical Review (ITR) services. CSI Geo also helped coordinate field-surface explorations for a 7.3 mile reach of HHD. The geotechnical analyses included seepage and stability analysis for several design alternatives, including implementation of a cut off wall along the dike centerline, small/long landslide berms, and berm-toe drainage systems. Other analyses included seismic/liquefaction assessment, settlement estimates, sheet pile analysis, and pile capacity estimates for support of structures crossing the dike.
Project Name: Herbert Hoover Dike
Owner: US Army Corps of Engineers
Contact: Jay Davis
Phone Number: 907-232-2042
BAYOU SEGNETTE STATE PARK FLOODWALL
CSI Geo was tasked with the geotechnical investigation and engineering analyses for the design of an 8,000 ft long floodwall and floodgates within the Bayou Segnette State Park. The project is a part of the West Bank and Vicinity, New Orleans, Louisiana, Hurricane Protection Project. The project site is located just west of the town of Westwego, in Jefferson Parish, Louisiana.
The existing floodwall and flood gates will be upgraded to meet new flood control criteria. The proposed flood protection upgrade would ensure that the system meets the new 100-yr flood protection requirements.
Our scope of work included:
- Development of design parameters
- Performance of stability analysis for T-Wall monoliths by the Spencer’s method of slope stability analysis
- Performance of Method of Planes analysis for pile supported cantilever walls (T-Walls) as a check of Spencer’s method
- Estimating compressive and tensile pile capacities for T-Wall foundations
- Design of seepage cutoff wall
- Development of horizontal subgrade moduli and overburden effective stress curves
- Documenting findings in a geotechnical design report
- Performing an Independent Technical Review (ITR)
- Engineering During Construction (EDC) services
Project Name: Bayou Segnette State Park Floodwall
Owner: US Army Corps of Engineers, New Orleans
Contact: Craig Waugaman
Phone Number: 504-862-2673
JEFFERSON LAKEFRONT & WEST RETURN CANAL FLOODWALL
This project consisted of the preparation of Plans & Specifications (P&S), and Engineering during Construction, for flood protection enhancements along the West Return Canal and Lake Pontchartrain. The project site was located in Jefferson Parish, LA and was part of the USACE Hurricane Protection Project. The designs brought the hurricane protection to a Phase II 100 year level. As a partner of the Hurricane Protection Alliance (HPA) Joint Venture, CSI Geo staff was tasked with performing geotechnical engineering analysis for various project components.
The components of the project include:
A. Floodwall & Gate at Williams Blvd Boat Launch: The Williams Blvd. floodwall segment consisted of an I-wall, T-wall and a vehicular gate monoliths. A new T-wall (pile supported cantilever concrete wall) section and roller gate was designed to replace the existing features. Geotechnical services included field investigations (piezo-CPT and field vane shear tests), other geotechnical data analysis, deep foundation analyses, slope stability, seepage cutoff wall analysis, temporary retaining systems, and downdrag analysis.
B. Kenner West Return Floodwall: Approx. floodwall length: 18,300 ft; This segment consisted of various T-wall and I-wall monoliths with a levee tie-in sheet pile (south end) and a Re-curve Floodwall tie-in (north end). The team developed P&S for a new T-wall section to replace the existing floodwalls. Also, geotechnical services were provided in the execution of six full scale pile load tests. Special exceptions were taken at the I-10 Overpass and Parish Line Canal Pump Station:
- I-10 Overpass – This included a steel diaphragm between the existing I-wall and I-10 overpass structure. A new T-wall section was placed between the two overpasses, with a wall top elev. of 14.5 ft. The A-E coordinated bridge and diaphragm interaction with LaDOTD and other entities. A breakwater was designed to minimize wave loading on the structure.
- Parish Line Canal Pump Station – The P&S included a new T-wall section to replace the existing floodwalls. The new constructed top of wall increased to elev. 17.5 ft.
- West Esplanade Ave. – The P&S included a new pedestrian access gate within the T-wall monolith located at the end of West Esplanade Ave.
C. Re-Curve Floodwall in Northwest Kenner: Approx. Floodwall Length: 850 ft. This segment in N.W. Kenner consisted of I-wall monoliths, wave buffers, and a vehicular gate. The A-E developed P&S for a new T-wall section and swing gate to replace the existing features.
Project Name: Jefferson Lakefront & West Return Canal Floodwall & Structures Improvments
Owner: US Army Corps of Engineers
Contact: Craig Waugaman
Phone Number: (504) 862-2673
MAYPORT FITNESS CENTER
CSI Geo has been involved in many construction and infrastructure improvement projects at Naval Station Mayport in Jacksonville, Florida. The fitness center addition included a new gymnasium and outdoor sports field. The gymnasium featured an indoor swimming pool, aerobics and exercise areas, racquetball courts, storage areas, and locker rooms. Geotechnical services included the following elements:
- Shallow foundation analyses including settlement and bearing capacity
- Recommendations for ground improvement
- Driven pile capacity analysis
- Auger-cast pile capacity analysis
- Recommendations for pile spacing based on pile group effects
- Floor slab construction recommendations
- Pool construction recommendations
- Evaluation of paved parking areas
- Seismic analysis and classification
Project Name: Mayport Fitness Center
Owner: US Navy
Client: URS Group, Inc.
Contact: Fred Walker, PE
Phone Number: (813) 286-1711
NAVAL AIR STATION JACKSONVILLE CHILD DEVELOPMENT CENTER
This project is among CSI Geo’s projects located at Naval Air Station Jacksonville. This facility is a 30,954 SF one-story child care structure. The facility design is brick veneer, with a standing seam metal roof. CSI Geo provided all necessary geotechnical engineering services for the design and construction of this facility.
Project Name: Naval Air Station Jacksonville Child Development Center
Owner: US Navy
Client: URS Group, Inc.
Contact: Fred Walker, PE
Phone Number: (813) 286-1711
SECURITY ENCLAVE – NAVAL SUBMARINE BASE KINGS BAY
This project is one of several that CSI Geo was involved with performing several tasks for the Naval Facilities Command Southeast in Kings Bay, Georgia. This project in particular consisted of geotechnical exploration and engineering analysis for a new section of the Perimeter Intrusion Detection and Assessment System (PIDAS) that traversed approximately two miles over land, 3,000 feet along a salt water marsh, a channel, and 2-1/2 miles on an island.
The base is the east coast homeport for the venerable Ohio-class nuclear powered ballistic missile (SSBN) and reconfigured guided missile (SSGN) submarines. Given its sensitivity, Kings Base Submarine base is highly secured, requiring a high degree of coordination between our personnel and on-base personnel from multiple departments.
The geotechnical work was performed often in difficult terrain, including highly wooded areas with very limited access and marsh terrain typically swamp-like, with a very demanding time schedule. CSI Geo met the time schedule by designating two full-time on-site supervisors, a security coordinator, and by mobilizing and managing a barge, an airboat, a support boat, an amphibious rig, two all-terrain drill rigs, and two truck mounted drill rigs which worked in 10 day shifts. Our adherence to the security directives, combined with our ability to mobilize, supervise, and manage multiple crews and drill rigs resulted in completing the entire work in a very short time frame and ahead of schedule.
Project Name: Security Enclave – Naval Submarine Base Kings Bay
Owner: US Navy
Client: URS Group, Inc.
Contact: Charlie Evans, P.E.
Phone Number: (813) 286-1711