260 Stone Quarry Storm-water Basin Sediment Dewatering
The storm water retention basin at a Kentucky Stone Quarry overflowed its banks and flooded two adjacent mine shafts during the Spring of 2006. A site survey estimated that approximately 18,000 cubic yards of aggregate sediments at 40% dry weight solids had accumulated in the basin, decreasing its storage capacity by greater than 50%. The objective of this project was to dredge the storm water retention basin to its bedrock bottom and simultaneously increase the storm water retention basin’s berm height by seven feet, to protect the shafts from future flooding events.
DOWNLOAD PDF Applications & ProductsGeotextile Tube Containers, Dewatering, Polymer Makedown Units, PolymerServicesTurnkey Project Management, DewateringIndustryMiningLocationKentucky, USA
Dredging with dewatering bags
Sending dredged sediment from the quarry basin to geotextile tubes mobilized to capture, retain, and dewater the sediment.
Dredge at work
Dredging the sediments in the stormwater basin.
Aerial view of geotextile tubes on site
Once the tubes are filled to their maximum capacity, they will continue to allow the sediment to dewater over the next several months. At that time, the tubes will be cut open the sediment excavated and hauled away
Geotextile tubes being filled with sediment slurry
The Geotextile tube containers mobilized on a containment pad are filling slowly and allowing for dewatering to take place via the porous geotextile material.
OBJECTIVE
The stormwater retention basin at a Kentucky Stone Quarry overflowed its banks and flooded two adjacent mine shafts during the Spring of 2006. A site survey estimated that approximately 18,000 cubic yards of aggregate sediments at 40% dry weight solids had accumulated in the basin, decreasing its storage capacity by greater than 50%. The objective of this project was to dredge the stormwater retention basin to its bedrock bottom and simultaneously increase the stormwater retention basin’s berm height by seven feet to protect the shafts from future flooding events.
SOLUTION
It was calculated that 1,100 feet of 45 ft circumference geotextile tube containers would be needed to dewater and contain this dredge volume to greater than 60% solids. The resulting volume and mass of residuals at 60% solids would be 3,895 cubic yards and 3,960 tons, respectively. WaterSolve and the dredging contractor completed the installation of the geotextile tube containers, temporary piping, and the polymer make-down and feed equipment in October 2006. In order to maximize the containment and consolidation efficiency of the geotextile tubes, WaterSolve recommended that the facility re-fill the geotextile containers at least three times in order to maximize their containment capacity and dewatering efficiency.
The dredging contractor and WaterSolve were contracted by the Kentucky Stone Quarry to dredge 18,000 cubic yards of aggregate sediments from their stormwater retention basin and dewater the residuals in 1,100 feet of 45’ circumference geotextile containers located between the basin and storage shafts.
THE RESULT
The Stone Quarry decided to hire Watersolve for remediation of the storm water basin to help with the dewatering and chemical treatment of the project. Watersolve was tasked to provide Geotextile tubes, polymer feed equipment, Polymer, and technical assistance for the daily operations of the project. The Project was deemed a success when the 1100 ft of geotextile tube fabric was filled. The project was completed in a timely manner and both the Stone Quarry and Watersolve was happy with the result
