As part of an effort to restore emergent sandbar habitat in the Missouri River for two endangered species of bird (the least tern and the piping plover), the U.S. Army Corps of Engineers (USACE) let this project. IAI provided geotextile tube installation and filling services, deploying and filling approximately 1,028 lineal feet of 40 foot circumference geotextile tubes in the waters of the turbulent Missouri River. The geotextile tube installation trapped sediment being transported down river, and created emergent habitat for waterfowl in the Missouri.
The tubes were filled with sandy borrow material to a height of about one foot above the normal depth of the river, such that the top surface of the tubes was above the water surface. Tubes installed ranged from 157 feet to 200 feet in length and were placed end-to-end to create a line of tubes within the river. The line of tubes forms a barrier to suspended sediment in the river, trapping it and causing sandbars to form which provide needed habitat for the endangered bird species and replace sandbars which have been lost over the years due to dredging and dam construction on the Missouri. After four to six months, sediment had built up enough behind the tubes to create small islands in the river. At this point, the tubes were removed from the river.
IAI personnel deployed the geotextile tubes and scour apron simultaneously into the river from a barge, then worked from small work boats to secure the tubes into position, measure the filled height of each tube, remove fill pipe connections and seal the fill ports after filling. Currents in the Missouri during the performance of the project were four to eight miles per hour with heavy undertows.
Scope of Work
IAI was retained by the General Contractor to install and fill geotextile tubes in the river.
- 1,028 lineal feet of 40 foot circumference geotextile tubes
- Work boats