(Richmond, IN)--Westbound I-70 was shut down throughout the overnight hours Monday night and Tuesday morning after a semi crash.  It happened at 11:30 Monday night near the Seara Burton overpass on Chester Boulevard.  The semi left the roadway, went down an embankment, and ended up in a branch of the Whitewater River.  The driver had to be extricated from the wreckage.  Westbound interstate traffic earliy Tuesday morning was being diverted onto State Road 227, which caused several Richmond Streets to be clogged with semi traffic.  There’s no word yet on the condition of the driver or what led to the crash.  It happened in the Revive I-70 construction zone.