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Ancient boat building methods can be categorized as one of hide, log, sewn, lashed-plank, clinker (and reverse-clinker), shell-first, and frame-first. While the frame-first technique dominates the modern ship construction industry , the ancients relied primarily on the other techniques to build their watercraft.
The water was drained from the locks and the boats would descend the incline counterbalanced by a second empty boat ascending the parallel railway line. This incline worked until 1822 and the levels were used for coal transport until 1887, by which time the total length of navigable levels was 46 miles (74 km).
When the top of the excavation is the ground surface, it is referred to as a shaft; when the top of the excavation is underground, it is called a winze or a sub-shaft. Small shafts may be excavated upwards from within an existing mine as long as there is access at the bottom, in which case they are called raises .
Archaeologists found three more ceramic jars of coins in nearby ruins of a masonry building from medieval France.
Storm water is typically channeled to a retention basin through a system of street and/or parking lot storm drains, and a network of drain channels or underground pipes.. The basins are designed to allow relatively large flows of water to enter, but discharges to receiving waters are limited by outlet structures that function only during very large storm eve
Storage pits are underground cists that were used historically to protect the seeds for the following year's crops, and to stop surplus food from being eaten by insects and rodents. These underground pits were sometimes lined and covered, for example with slabs of stone and bark and tightly sealed with adobe .
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The waterproof walls were 3 feet (0.91 m) thick and 70 feet (21 m) high. [ 2 ] The excavated material that was dug up to build the bathtub was again used as landfill to construct Battery Park City , and the same method was also used to construct the foundation area of the Willis Tower in Chicago .