 The Portavant Mound (or Snead Island Temple Mound) is one of fifteen or more "temple mounds" produced by the Safety Harbor culture (900–1725) found in the vicinity of Tampa Bay.The mound is four meters high, measures 45 m by 75 m at the base, and has a flat top that is 24 m by 46 m. Unlike other "temple mounds" around the Tampa Bay area, the Portavant Mound does not have a ramp to the top of the mound.There is a lower (one m high) platform, about 30 m by 30 m, that abuts the main mound.