(Richmond, IN)--A semi and an SUV collided on I-70 Thursday afternoon.  The semi ended up in a precarious place.  "Semi went off the roadway and ended up down an embankment.  That tractor part was in the river," said Battalion Chief Chuck Powell.  The driver was able to get out on his own in the of the Whitewater River on Richmond’s east side.  Westbound traffic came to a standstill.  The semi was carrying dog food.  There was another issue.  "It was leaking diesel fuel into river.  We put out some booms to help contain the leak," Powell explained.  About 300 gallons of fuel leaked into the river.  There were no injuries reported.  Traffic on 70 was affected for more than three hours.