The management levee between the GIWW and the
Cameron Prairie National Wildlife Refuge was in danger
of breaching as a result of erosion from boat traffic in the
GIWW. If breaching had occurred, wave energy from the
GIWW and salt water would have entered the organic,
A 13,200-foot rock breakwater was constructed 50 feet
from the northern bank of the GIWW to prevent waves
caused by boat traffic from overtopping and eroding the
remaining spoil bank.
The project’s effectiveness is being evaluated by shoreline
movement surveys and by comparing pre-construction and
post-construction aerial photographs for changes in marsh
This project is located in Cameron Parish, Louisiana, on
the north shore of the Gulf Intracoastal Waterway
(GIWW), approximately 7 miles southeast of Sweet Lake
and to the east of Louisiana Highway 27 at its intersection
with the GIWW. It encompasses 640 acres of fresh marsh
and open water.
During 1993-97, while the project area had a 4.9% increase in
water coverage due to management for waterfowl, the
reference area remained unchanged.
The results of shoreline monitoring indicate that the project
has protected 13,200 feet of shoreline, along with 247 acres of
marsh north of the dike. This protection is expected to accrue
throughout the life of the project for a net restoration of at
least 23 acres. Monitoring has shown that the GIWW’s
northern shoreline advanced 9.8 feet per year in the project
area while retreating at a rate of 3.0 feet per year in the
reference area, indicating that low sediment availability does
not prohibit wetland creation behind rock dikes on navigation
To date, the project has exhibited success. It is expected that
the project area will continue to accrete new wetland area
between the spoil bank and the rock dike, further
safeguarding the adjacent wetland area from encroachment by
This project is on Priority Project List 1.
The Federal Sponsor is USFWS
The Local Sponsor is CPRA
The lower salinity marshes are converting to shallow, open water due to elevated salinity events and subsidence. Navigation channels provide a direct route for salt water to infiltrate the marsh, disrupt the natural water circulation, and allow rapid runoff of fresh water. The larger Sabine-Neches Waterway and the Gulf Intracoastal Waterway (GIWW) have allowed saltwater intrusion into the project area’s fresh and intermediate marshes. Elevated tidal fluctuations in these channels have led to increased water flow, which has increased the conversion of marsh to open water. Area marsh loss is also caused by wave action along Sabine Lake and interior marsh shorelines and other natural causes (i.e., subsidence).
The project features include: a rock weir in Pines Ridge Bayou; three culverts with flap gates at Bridge Bayou; a 3,000 foot-long rock rip-rap breakwater along the Sabine Lake shoreline at Willow Bayou; a weir/plug at the opening at Starks South Canal Section 16 levee; and 232,000 linear feet of vegetated earthen terraces in the vicinity of Greens Lake.
The project is located in the western portion of the Sabine National Wildlife Refuge from Pool 3 to the eastern shoreline of Sabine Lake in Cameron Parish, Louisiana.
Construction was completed in October 2010.
This project is on Priority Project List 10.
The Federal Sponsor is U.S. Fish and Wildlife Service
The Local Sponsor is CPRA
On Saturday, October 13th, the CWPPRA outreach team rolled up to the Southeast Louisiana National Wildlife Refuges Headquarters in Lacombe, LA for Wild Things. The U.S. Fish and Wildlife Service puts on Wild Things every year during National Wildlife Refuge Week to celebrate wildlife and getting out into nature. This year we brought our Wetland Wonders game, along with all our regular publications. We underestimated how popular our materials would be and quickly ran out of everything. We were set up on a beautiful day in the shade. Nearby, families could learn about wilderness survival, injured bird rehabilitation, native animal and plant species, and much more.
The Wetland Wonders game was well-received by children and adults alike. We had a short lull around lunchtime but otherwise the boxes constantly had visitors. Our Wetland Wonders activity asks players to guess the object inside the box without looking at it. Players can feel inside and read clues that are on the front of the boxes. Many people start out timid from the mystery but play the game once they believe there is nothing alive or gross in the boxes. We enjoy events like this and we urge you to seek similar events for your family and friends. To find more events by the Fish and Wildlife Service, you can visit their website and search for your nearest Wildlife Refuge. Get out and #ProtectOurCoast!