Results of audiomagnetotellunc (AMT) and radiomagnetotelluric (RMT) methods at the area of construction of the San-Pedro tunnel of the high-speed railway Madrid - Vayadolid are considered. Estimations of possibilities of used methods at study of deep structure of the area and detail mapping of rocks at the top part of cross section are fulfilled. A comparison of obtained results with data of previous investigations and drilling is carried out.