As it lacks a legible inscription (one was apparently located in aqueduct's attic, or top portion), the date of construction cannot be definitively determined. Researchers have placed it between the second half of the 1st Century AD and the early years of the 2nd Century— during the reign of either Emperor Vespasian or Nerva. The beginnings of Segovia itself are likewise not definitively known. Vacceos are known to have populated the area before the Romans conquered the city. Roman troops sent to control the area, which fell within the jurisdiction of the Roman provincial court (Latin conventus iuridici, Spanish convento jurídico) located in Clunia, stayed behind to settle there.

• River Frio