USACE Santa Maria River Basin Improvements, Santa Barbara County, CA
USACE Santa Maria River Basin Improvements, Santa Barbara County, CA

Owner

U.S. Army Corps of Engineers

Start Date

October 2008

Completion Date

January 2010

DYA Client

U.S. Army Corps of Engineers

Project Description

Diaz•Yourman & Associates (DYA) performed a geotechnical investigation for the proposed flood control improvements project in the Santa Maria River Basin, Santa Barbara County, California.  The project scope consisted of reconstructing the riverside levee face.  The proposed reconstruction will require excavations along the toe of the riverside of the levee, replacing the existing riprap slope facing with soil-cement, and backfilling of the excavated soils at the toe of slope. The purpose of DYA’s investigation was to provide geotechnical data for the design of the proposed project. Our scope of services consisted of the following tasks:

Marking the boring locations in the field

Coordinating clearance of the boring locations for underground utilities with Underground Service Alert (USA)

Conducting a field investigation

Performing geotechnical laboratory tests on selected soil samples

Performing a soil-cement design study on representative bulk-soil material collected adjacent to the toe of slope

Performing engineering analyses to develop conclusions and recommendations regarding the following:

Site preparation and grading

Seismic hazards, including liquefaction potential and lateral spreading

Stability of the levee against steady-state seepage flow

Slope stability under static, pseudo-static, and temporary conditions

Preparing a written report summarizing the geotechnical lab test results, including soil-cement study test results, and geotechnical analyses, and providing conclusions and recommendations

Saroj P. Weeraratne, PhD, PE, GE – Geotechnical Manager
Allen M. Yourman, Jr., PE, GE – Geotechnical Principal
V. R. Nadeswaran, PE, GE – Geotechnical QA/QC Reviewer
S. Niranjanan, PE, GE – Geotechnical Project Engineer

Our Services

Design

  • Site and route evaluations
  • Geologic hazards
  • Seismic design
  • Site characterization
  • Subsurface drainage
  • Grading
  • Ground improvement
  • Slope stability
  • Foundations
  • Dynamic analyses
  • Pavements
  • Instrumentation

Construction

  • Material sources
  • Construction observation and testing
  • Verification of anticipated conditions
  • Evaluation of changed conditions
  • Foundation installation
  • Instrumentation
  • Claims evaluation

Environmental

  • EIR/EIS
  • Site characterization
  • Remediation
  • Solid and liquid waste disposal
  • Landfill
  • Aerially Deposited Lead (ADL) Studies
  • Phase I Initial Site Assessments (ISA)
  • Phase II Hazardous Waste Studies
  • Sustainability

Legal

  • Forensic investigation
  • Litigation support
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