  Cosmic rays arriving at Earth collide with the upper parts of the atmosphere,
thereby inducing extensive air showers. When secondary particles from the
cascade arrive at the ground, they are measured by surface detector arrays. We
describe the methods applied to the measurements of the surface detector of the
Pierre Auger Observatory to reconstruct events with zenith angles less than
$60^\circ$ using the timing and signal information recorded using the
water-Cherenkov detector stations. In addition, we assess the accuracy of these
methods in reconstructing the arrival directions of the primary cosmic ray
particles and the sizes of the induced showers.
