The accident happened just before 5:30am on Highway 290 at Baur Road. It's not clear how the accident happened but a heavy truck, carrying what appears to be sand, ended up on its side and the deputy apparently rammed into it.
The driver of the truck was injured and was transported to a nearby hospital. The extent of his injuries is unknown at this time.
The HCSO deputy also sustained minor injuries.
At this point, it's not clear how long the closure will last. Stay with Eyewitness News and abc13.com for the latest on this closure.
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