Name & Address
and Project Manager's Name &
Phone Number
Complete
Entire
Project
which firm
Mobile, Alabama
Gulf Shores, Alabama
Dual Frequency Hydrographic
24 hour response
Irvington Site Office
100
24
24
Just after Hurricane Georges, on October 1, 1998, GCT, Inc. received a call from the Irvington Site office requesting a fully equipped hydrographic survey vessel and crew to be mobilized to Mobile, AL the same day. The vessel, equipment and crew arrived in Mobile that night.
The REQUEST:
The circumstances required hydrographic condition
surveys to be performed ASAP, in order to insure safe navigation of the waterways in the
Irvington Site Office Project. Cross sections were to be taken at 400' intervals, high and
low frequency depths were to be collected, and the data was to be provided in a specific
ASCII format.The initial survey work order contained three areas, Chickasaw Creek and Fowl
River (inside and outside), in the Mobile, AL area, and Bayou Casotte (inside and
outside), in the Pascagoula, Mississippi area. After completion of the first request an
additional work order was issued for the Escatawpa River and 80,000' along the Gulf
Intercoastal Waterway from Oyster Bay to Wolf Bay in the Gulf Shores, Alabama area. There
were a total of 613 cross sections along 26.26 miles of channel.
The EFFORT:
The survey crew began running sections on the 3rd of
October and completed the work on the 10th of October. The effort required eight
consecutive, 12+ hour working days. The data was delivered to the Irvington Site Office as
each site was completed. The survey vessel was a 24' SeaArc with two 90 hp Johnson motors,
a 10' climate controlled cabin and a 5000 kw Honda generator. The survey equipment
included, an Odom Echotrak DF 3200 MKII dual frequency survey echo sounder, a Seatex MRU-H
Heave Compensator and a rtNavigation 4000SE GPS receiver with a Starlink Coast Guard
NavBeacon receiver
.
STANDARD FORM 255 PAGE 10 (REV. 11-