Lesson 1/Practice Exercise
You use a simple field test to check the hardness of some potential quarry material. You are
unable to scratch the rock's surface with a copper coin, but can scratch it with a knife blade.
According to Moh's scale of hardness, how would you rate this material?___________________
Is this material suitable as an aggregate for general construction? ___________________
You are considering a possible quarry site. A critical factor for this quarry operation is quantity
of material. Estimate the yield from this potential site (expressed in loose cubic yards) from the
average depth of face is 24 feet
usable quarry working area is 110,000 square yards
about 12 percent of the rock is weathered
One of the potential quarry sites you are considering has the following characteristics:
the site is undeveloped
usable material is about 30 feet in depth
Is this a likely quarry site? Why or why not? _________________________________________
You must find a quarry site for a construction operation. What three steps will you use to find,
evaluate, and select a site?
Aerial photographs are very useful for __________________ information. They are used most
reliably, however, when __________________________________.
You have conducted a site reconnaissance survey to find potential quarry sites. How will you
There are a number of site evaluation factors which you must consider. The importance you
place on each of these factors depends upon the particular situation. In a forward, theater of
operations area, you will probably make _________________________ an
consideration. A quarry planned for long-term operation in a civilian, residential area will
probably make ______________________________ factors an important consideration.