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A handwritten spreadsheet. A basic estimating spreadsheet. Cost estimators used columnar sheets of paper to organize the take-off and the estimate itself into rows of items and columns containing the description, quantity and the pricing components. Some of these were similar to accounting ledger paper.
The world's biggest consumer of slate is France, followed by the UK, USA and Germany. In 2012, Spain produced more than 580,000 tonnes (570,000 long tons; 640,000 short tons) of slate worth about $380 million. This made it the largest slate producer in the world, followed by China and Brazil. [3]
A cost estimate is the approximation of the cost of a program, project, or operation. The cost estimate is the product of the cost estimating process. The cost estimate has a single total value and may have identifiable component values. A problem with a cost overrun can be avoided with a credible, reliable, and accurate cost estimate. A cost ...
Buckingham Slate is quarried in Buckingham County, Virginia, in the town of Arvonia. This natural stone has a distinct gray/blue/black color and glistens due to its ...
The quarrying of slate in Cornwall is known to have been carried out from the late mediaeval period and there was a considerable export trade from some of the quarries near the coasts in the 19th century. Slate has also been quarried at Swithland in Leicestershire. There are considerable workings in Cumbria. During the last 500 years, much ...
The Massachusetts Hornfels-Braintree Slate Quarry is a prehistoric archaeological site [2] in Milton and Quincy, Massachusetts.It consists of a series of pits and trenches used from 5,000 B.C. until the early 17th century as a source of slate and hornfels used for chipped and ground tools.
In Ancient Egypt, the rulers of the Twelfth Dynasty (c. 2000–1800 BC) undertook a far-sighted land reclamation scheme to increase agricultural output. They constructed levees and canals to connect the Faiyum with the Bahr Yussef waterway, diverting water that would have flowed into Lake Moeris and causing gradual evaporation around the lake's edges, creating new farmland from the reclaimed land.
Llechwedd quarry (Welsh pronunciation: [ɬɛχˈwɛð]) is a major slate quarry in the town of Blaenau Ffestiniog, north Wales. At its peak in 1884 it produced 23,788 tons of finished slate per year and had 513 employees. It continues to produce slate on a limited scale and is the location of the Llechwedd Slate Caverns tourist attraction.
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