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2. Biorock - Wikipedia

   en.wikipedia.org/wiki/Biorock

   Biorock forming on rebar in seawater in the presence of a small electric current to form an electrified reef. Biorock (also seacrete [1]) is a cement-like engineering material formed when a small electric current is passed between underwater metal electrodes placed in seawater causing dissolved minerals to accrete onto the cathode to form a thick layer of limestone.

3. Riprap - Wikipedia

   en.wikipedia.org/wiki/Riprap

   [1] [2] [3] Common rock types used include granite and modular concrete blocks. [4] [5] Rubble from building and paving demolition is sometimes used, [3] [6] as well as specifically designed structures called tetrapods or similar concrete blocks. Riprap is also used underwater to cap immersed tubes sunken on the seabed to be joined into an ...

4. Electrified reef - Wikipedia

   en.wikipedia.org/wiki/Electrified_reef

   An electric reef (also electrified reef) is an artificial reef made from biorock, being limestone that forms rapidly in seawater on a metal structure from dissolved minerals in the presence of a small electric current. The first reefs of this type were created by Wolf Hilbertz and Thomas J. Goreau in the 1980s. By 2011 there were examples in ...

5. Bridge protection systems - Wikipedia

   en.wikipedia.org/wiki/Bridge_protection_systems

   artificial islands built with sand and rock core that is protected by riprap. The islands are quite effective in protecting the pier by pushing the ship away, but cause environmental damage to the river bottom and, while settling , might shift the bridge piers; [ 8 ]

6. Petenwell Lake - Wikipedia

   en.wikipedia.org/wiki/Petenwell_Lake

   Lake Petenwell is an artificial lake on the Wisconsin River in central Wisconsin. It is located in Adams, Juneau, and Wood counties next to Castle Rock Lake. It covers over 23,000 acres (93 km 2) and is 42 feet (13 m) deep. Lake Petenwell is Wisconsin's second largest lake at 23,040 acres (93.2 km 2) or approximately 36 square miles (93 km 2).

7. AOL

   search.aol.com

   The search engine that helps you find exactly what you're looking for. Find the most relevant information, video, images, and answers from all across the Web.