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  2. Slipway - Wikipedia

    en.wikipedia.org/wiki/Slipway

    A slipway, also known as boat ramp or launch or boat deployer, is a ramp on the shore by which ships or boats can be moved to and from the water. They are used for building and repairing ships and boats, and for launching and retrieving small boats on trailers towed by automobiles and flying boats on their undercarriage .

  3. Roller dam - Wikipedia

    en.wikipedia.org/wiki/Roller_dam

    Roller dams are a type of weir, or a dam that is designed to allow water to flow over the top in continuous action. They are used on rivers or other such moving bodies of water where erosion damage is undesirable, yet likely to occur. A short wall, lip, or parabolic channel is constructed on the downstream side of the dam parallel to the dam face.

  4. Falls Township Community Park - Wikipedia

    en.wikipedia.org/wiki/Falls_Township_Community_Park

    It is situated in two sections divided by a creek. One side is centered around a man-made lake with a trail around the lake and various amenities including a dog park, basketball courts, roller hockey rinks, a softball field, and a skate park. The lake itself is open to fishing and small-craft recreation boating with a boat ramp located on ...

  5. Dry boat ramps, exposed rocks at Lake Powell reveal the cost ...

    www.aol.com/news/dry-boat-ramps-exposed-rocks...

    The former concrete Stateline Ramp is now dry, but the retreating water exposed an adjacent asphalt ramp that apparently was built before the reservoir filled and then was submerged by 1967.

  6. Roll-on/roll-off - Wikipedia

    en.wikipedia.org/wiki/Roll-on/roll-off

    Procyon Leader stern quarter ramp. Roll-on/roll-off ( RORO or ro-ro) ships are cargo ships designed to carry wheeled cargo, such as cars, motorcycles, trucks, semi-trailer trucks, buses, trailers, and railroad cars, that are driven on and off the ship on their own wheels or using a platform vehicle, such as a self-propelled modular transporter.

  7. Lock and Dam No. 15 - Wikipedia

    en.wikipedia.org/wiki/Lock_and_Dam_No._15

    Lock and Dam No. 15 is a lock and dam located on the Upper Mississippi River.It spans the river between Rock Island, Illinois and Davenport, Iowa.Lock and Dam 15 is the largest roller dam in the world, its dam is 1,203 feet (366.7 m) long and consists of nine 109 feet (33.2 m) non-submersible, non-overflow roller gates and two 109 feet (33.2 m) non-submersible overflow roller gates.

  8. Egyptian pyramid construction techniques - Wikipedia

    en.wikipedia.org/wiki/Egyptian_pyramid...

    Egyptian pyramid construction techniques are the controversial subject of many hypotheses. These techniques seem to have developed over time; later pyramids were not constructed in the same way as earlier ones. Most of the construction hypotheses are based on the belief that huge stones were carved from quarries with copper chisels, and these ...

  9. AOL Mail

    mail.aol.com

    You can find instant answers on our AOL Mail help page. Should you need additional assistance we have experts available around the clock at 800-730-2563.

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