Hydraulic Power Assist Steering System problems of the 1998 Plymouth Grand Voyager

This is the second time this has happened. The first time was 2 months after purchase. An exceptional amount of rain had fallen and many roads had standing water on them. While negotiating one spot (approx. 6-12 in) all power steering ability was lost. Assuming the belt was wet continued to drive until warning light and signal showed overheating. Discovered that serpentine belt had fallen off. Dealer replaced and informed that incident had been reported to Plymouth. Today same problem. Attempting to negotiate several instances of water, less than 25mph and suddenyl, no power steering. Personally reported to Plymouth and was informed that they had not heard any instances of this failure. Questioned dealer and was informed that they had seen it happen several times. Initial problem: tension pully has no edge to hold belt on if water gets between pulley and belt. Pulley is also smooth which causes belt to slip. Result: loss of power steering, loss of charging to battery, loss of power to drive headlights/wipers/air conditioning. Dangerous result: loss of control/visibility. Solution(?): replace smooth pulley with one that has edges and put grooves of some sort on the pulley to allow water to be sheeted off if it comes between the pulley and the belt.

The vehicle is experiencing a loss of power steering,a/c,and the electrical system. Also, engine belt needs to be replaced. Dealer has replaced engine belt 3 times. The problem has happened 5 times.