• V. Schoefer, L. A. Ahrens, K.A. Brown, A.U. Luccio, W.W. MacKay, T. Roser
  BNL, Upton, Long Island, New York

In order to preserve polarization during polarized proton operation for RHIC, two partial Siberian Snakes are employed in the AGS, where a number of strong spin depolarization resonances must be crossed. These Snakes cause a significant distortion to the injection lattice of the AGS and must be included in the on-line model. In this report we discuss the problem of modeling Snakes as optical elements, particularly as madx elements, and present results comparing measurements to the AGS on-line model.