4. the grades on a vertical curve intersect at station 105+00, elevation 350.00 ft. a drain grating exists at station 105+00 and elevation 358.30 ft. (a) what is the minimum continuous curve length such that no point will be lower than the drain grating? (b) if a length of 1900 feet is used, what are the stations of bvc and evc? (c) if a length of 1900 feet is used, what is the elevation of the lowest point on the curve? (d) if a length of 1900 feet is used, what is the elevation at station 106+40.00?

An external consultant recommends that a plant installs a bank of capacitors for power factor correction. this will reduce the peak electrical demand charges by an average of 93 kw every month. the plant current pays $13 per kw in peak demand charges. the capacitor bank will include 223 kw of fixed capacitors, and 183 of variable capacitors. the fixed capacitors cost $59 per kw, and the variable capacitors will cost $65 per kw. the consultant charges 21% of the equipment costs to install the capacitors. because this project will reduce the demand for the electric utility, they are prepared to provide a one-time rebate of $42 per kw of reduced demand. what is the simple payback period for this project (in years)?