For
over 25 years, CSE has assisted Sasaki Associates (Boston) with coastal
engineering in connection with large waterfront developments.
Some recent projects include wave and flow modeling for the Daniel
Island Marina in Charleston (SC) and a flushing study for a proposed
marina in Panama City (FL).
For the Daniel Island Marina, CSE
collected detailed bathymetry in the lower Wando River and measured
tides, currents, turbidity, and discharge within the system using our
complement of acoustic current meters, pressure gauges, and synoptic
sampling gear. Time-series field data were used to calibrate the
hydrodynamic model, RMA2, under USACE’s Surface Water Modeling System
(SMS). Once calibrated, RMA2 was used to simulate flows and water
levels under extreme events. Waves were calculated for 10-, 50-,
100-, and 500-year events for mid-tide and peak-tide conditions.
The goal was to provide the marina designers with the range of
hydrodynamic forces for the setting so they could optimize the design
of piles and docks under Category 2 or Category 3 storm
conditions.
Isle of Palms is a 7-mile long, 1-mile wide
barrier island off South Carolina’s coast in Charleston County.
It is a blend of almost 5,000 fulltime residents, and 20,000 to 50,000
investment owners and visitors. The Wild Dunes Resort occupies 1,500
acres on the northeast end of the island, which includes two 18-hole
Fazio golf courses.
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| before renourishment |
after renourishment |
A July 2007 survey indicated that the condition of the beach at the
northeast end was worse than at any time since May 1984. Sand volumes
in this area had dwindled to an average of only 99 cubic yards per
linear foot at low tide compared to the 1984 average of 123 cubic yards
per linear foot, and even a peak in the late 90’s at 165 cubic
yards per linear foot. The result was basically loss of any dry beach,
and direct encroachment of the water on upland property. Erosion was so
severe that emergency sand bags had been placed along nearly all
properties in that area to protect building foundations. However, the
bags have not been totally effective.
CSE was hired to design and implement a beach renourishment project...
(click here for continued story)
Arcadian Shores is a section of South Carolina's Grand Strand between
North Myrtle Beach and Myrtle Beach. It is home to Hilton Hotel
Resort, Kingston Plantation, and several major residential towers.
While the cities immediately north and south are part of a
50-year federal beach nourishment project, Arcadian Shores is not
included. However, Horry County, which has jurisdiction over
Arcadian Shores, with funding assistance from the state of South
Carolina, has taken the initiative to maintain and improve the beach...
(click here for continued story)
Current progress on the 2008 Isle of Palms renourishment project can be found in the photo gallery,
including progress maps showing what has and has not been done so far
in each reach area and general pictures of the job sites. The
progress maps can be found in the album "Progress of 2008 Beach
Restoration" under the 2008 Isle of Palms Renourishment album, and they
will be updated on a regular basis as the project continues.
We have a new feature on the site - an online photo gallery. There
is an album there of the ongoing work on the
current Isle of Palms renourishment project; look for more
pictures of our work there and more albums of our other projects in the
next few weeks!
Welcome aboard our newest staff member, Matt Goldie. Matt filled
our Columbia office's opening for a CAD Engineering Technician, working
under our Senior Engineering Technician, Trey Hair.
After 13 years on Devine Street, CSE moved to new quarters at 160 Gills
Creek Parkway on August 1st. The new office gives us some
much-needed space so we can accommodate new staff and store all our
field equipment (which has expanded as our firm has grown).
Watch
for an announcement of our open house later in fall 2007. (It
will take us a couple of months to unpack over 20 years’
worth of
reports and archives from our 400+ projects over the years.)
Our phone numbers and normal mailing address remain the same.
Overnight shipping address changes to 160 Gills Creek Parkway Columbia
SC 29209.
Thank you for your patience earlier in August as we made the move and
temporarily lost communication with you.
Three CSE beach nourishment projects were
completed in record time between April 1st and July 31st. Thanks to
cooperating weather, efficient contractors, and timely decisions by
state and federal regulators, visitors to Edisto Beach, Hunting Island,
and Kiawah Island will enjoy wider beaches for the remainder of the
season.
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Renourished
Edisto Beach |
Edisto Beach was nourished
between 2 April and
11 May. Great Lakes Dredge & Dock Company (GLD&D)
(using the
dredge Illinois) pumped 875,000 cubic yards (cy) of sand from an
offshore shoal to the oceanfront. Nearly 3.5 miles of shoreline were
widened by an average of about 75 feet (ft). This was Edisto's
largest-ever nourishment project and more than five times the size of
the last project in 1995.
(Read
more. . .)
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Renourished
Hunting Island |
Beach nourishment at nearby Hunting Island was
completed between 20 May and 12 June. GLD&D moved their
equipment
across St Helena Sound and pumped 570,000 cy of sand from a borrow area
two miles offshore. This year's project was Hunting Island's eighth
nourishment since 1968 and will prepare the beach for groin
construction. Federal and state agencies granted a time extension on
their permits so that work could be accomplished in a timely manner at
lower cost while the dredge Illinois was "in the neighborhood."
(Read
more . . .)
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Renourished
Kiawah Island |
CSE's third project of the season was at the eastern end of Kiawah
Island.
L Dean Weaver Construction Company moved 550,000 cy of sand by trucks
and restored a one-mile section of beach along the famed Ocean Course.
This area had eroded over 400 ft in the past five years because of a
shoal-bypassing event. Work on this project was timed around the
arrival of piping plovers that inhabit the area. Sand hauling began 8
June and was completed on 26 July.
(Read
more . . .)
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CSE helped save
the sportfishing vessel, Fishing Taxi,
out of Oregon Inlet (NC) on July 7th. "We were on our way out of the
inlet to continue offshore coring for the Town of Nags Head when we
heard a mayday," according to Philip McKee, CSE's captain.
Read more ...
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Brunei |
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Charleston, SC
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Coastal
Primer |
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Debidue Island, SC |
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Edisto Island, SC |
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Edisto Island, SC
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Hunting Island, SC |
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Hurricane
Hugo |
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Kiawah Island |
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Kuwait |
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Kuwait
Al-Khiran |
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Matthews, VA |
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Nags Head, NC |
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New
Bern, NC |
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St. Lucia, West Indies |
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Savannah, GA |
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Seabrook
Island, SC |
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Seabrook
Island, SC |
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Washington,
NC |
CSE
is pleased to welcome Daniel H. Johnson (EIT) to the firm. Daniel
is a graduate of Clemson University (BSCE) and earned a Master of
Environmental Engineering and Science (Water Resources Concentration)
at the University of Tennessee. He brings several years of
industry experience including a number of stream restoration
projects.
Daniel’s expertise is in riverine hydraulics
and sediment transport. He has experience with a range of
USACE-approved/developed models including EPA SWMM 5.0, HEC-RAS,
HEC-HMS, and CCHE2D.
Recent projects include a
hydraulics and sedimentation study in Bailey Creek (Edisto Island) and
hydrodynamic modeling of Captain Sams Inlet and lower Kiawah River.
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