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16. What is the proper sequence of steps to construct a dewatering wellpoint system for a construction excavation? 1. Connect header pipe to suction pumps 2. Jet wellpoints into the ground 3. Connect wellpoints to header pipe with riser 4. Fill annular void with filter media
18. The Association of American State Highway and Transportation Officials (AASHTO) assumes that the height of a driver’s eye and the height of an object above pavement are which of the following (in inches) when developing recommendations for minimum stopping sight distances?
19. What is the passing sight distance for a section of 60 mph 2-lane rural highway with a 1740-ft vertical sag curve where a bridge passes over at 16.8 ft? (Assume S > L and A = 3.15.)
20. The American Association of State Highway Transportation Officials (AASHTO) recommended stopping sight distances are based on the operation of which type of vehicle?