H.K. Thatcher  Lock & Dam   |   Ouachita/Black Mile 281.9   |   870-748-2265
Navigation Pass	83'
Upper Navigation Pool	77'
Lower Navigation Pool	65'
Upper Lock Sill	59'
Lower Lock Sill	52'
Top of Lock Wall	85'
Top of Miter Gates	85'
Concrete Spillway Elevation	71'
Top of Closed Spillway Gates	77'
Embankment Elevation	79'

All elevations are in NGVD.
Spillways are hinged crest or fixed weir elevations.

POC for this page:

    Ryan Hoben
    601-631-5589
    Vicksburg, MS
    Ryan.M.Hoben@usace.army.mil