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2. Pond liner - Wikipedia

   en.wikipedia.org/wiki/Pond_liner

   Pond liners need to be protected from sharp objects (for example, stones) below the liner and from being punctured by any objects in the water body. Protection can be provided with layers of sand, geotextiles (particularly needle-punched nonwovens) and other materials. Pond liners are manufactured in rolls or accordion-folded on pallets.

3. Ash pond - Wikipedia

   en.wikipedia.org/wiki/Ash_pond

   Existing ash ponds that are contaminating groundwater must stop receiving CCR, and close or retrofit with a liner. Existing ash ponds and landfills must comply with structural and location restrictions, where applicable, or close. A pond no longer receiving CCR is still subject to all regulations unless it is dewatered and covered by 2018.

4. Beaver dam - Wikipedia

   en.wikipedia.org/wiki/Beaver_dam

   It takes a beaver about 20 minutes to cut down a 15-centimetre (5.9 in) wide aspen, by gnawing a groove around the trunk in an hourglass shape. A beaver's jaws are powerful enough to cut a 1.5-centimetre (0.59 in) sapling in one bite. [3] Maintenance work on the dam and lodges is often done in autumn. [citation needed]

5. Geomembrane - Wikipedia

   en.wikipedia.org/wiki/Geomembrane

   As liners for potable water; As liners for reserve water (e.g., safe shutdown of nuclear facilities) As liners for waste liquids (e.g., sewage sludge) Liners for radioactive or hazardous waste liquid; As liners for secondary containment of underground storage tanks; As liners for solar ponds; As liners for brine solutions

6. Waste pond - Wikipedia

   en.wikipedia.org/wiki/Waste_pond

   Peak usage of waste ponds in the United States occurred in the period 1955 to 1985, after which the environmental risks of pond technology were sufficiently understood, [5] such that alternative technologies [clarification needed] for waste disposal gradually began to displace many of the waste ponds. Waste ponds often have pond liners, such as ...

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