EMERGENCY SURVEY OF 85-MILES OF DELTA SHIP CHANNELS

Client: U.S. Army Corps of Engineers Completion Date: 2000 Contract Value: $150K

Chart Layout for San

Joaquin Ship Channel

The New Year’s Flood of 1998 caused shoaling

throughout the 44-mile long Sacramento Deep

SERVICES INCLUDED:

Ø Class 1 Condition Hydrographic Surveys.

Ø Sediment Sampling for Biological/Chemical Testing and Analyses.

Ø Class 1 Pre-Dredge Hydrographic Surveys.

Ø Dredger Inspection.

Ø Class 1 Post-Dredge Hydrographic Surveys.

Ø Plotting of Sounding Charts and Cross-Sectional Profiles.

Ø Dredge Volume Computations.

Water Ship Channel and the 41-mile long San

Joaquin River Ship Channel. Sea Surveyor

deployed multiple survey vessels to conduct

emergency hydrographic surveys of 85-miles

of Ship Channels under contract to the

Sacramento District, Corps of Engineers.

Sea Surveyor conducted multiple Class 1

hydrographic surveys on the Sacramento and

San Joaquin Deep Water Ship Channels during

“flood” conditions. Tides were monitored at

1-mile intervals upstream and downstream of

the survey vessels using self-recording tide

gauges referenced to local benchmarks.

Sounding Chart Close-up

Soundings were collected across the Ship

Channels along survey lines spaced at 100’

intervals and along the channel centerline.

Sounding charts and cross-sectional profiles

of the Ship Channels were delivered to

Corps representatives within 24-hours of

completing the field survey. Dredge

volumes for shoaling areas were computed.

Sea Surveyor continued to provide Pre- and

Post-Dredge Surveys and Sediment Testing

Location of 85-Mile Sacramento and San Joaquin River Ship Channels.

to the Corps of Engineers until dredging

of all shoal areas was completed in 2000.

960-C Grant Street, Benicia CA 94510

(707) 746-1853 info@seasurveyor.com