Hydrography
The Beech flows southeast into the town of Lexington and then primarily eastward. As is typical of most major streams in West Tennessee, much of the lower course was the subject of a channelization project in the mid-20th century conducted largely for agricultural purposes; this has resulted in a considerable loss of wetland. The stream crosses into Decatur County, flowing in between Parsons and Decaturville. The large embayment formed at the mouth of the Beech is the result of the backwaters of the Kentucky Dam project many miles downstream on the Tennessee; the embayment reaches the outskirts of both towns.
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