Rock fills are widely used to ensure a proper foundation ground for large industrial plants, airports and other structures where very strict tolerances are required for the magnitude of settlements, differential settlements and rotations. With these very strict requirements (allowable settlements within few centimeters) for the whole life time of the structures, the estimation of elastic and particularly of creep settlements of the rock fills becomes a crucial issue in the foundation design. The few settlement measurements on rock fill embankments and dams, available in literature, were used to develop a simplified method of creep and elastic settlement calculation and to estimate preliminary settlement parameters for foundation design of Troll Onshore Plant at Kollsnes (As Norske Shell), Snøhvit LNG Plant at Hammerfest (STATOIL) and Ormen Lange Onshore Terminal at Aukra (Norsk Hydro), in Norway. Due to uncertainties in creep parameters, settlement measurements has been performed at Kollsnes rock fill over a period of 11 years. These are used to verify the assumptions and parameters of the proposed method. The comparison between predicted and measured settlements shows a fairly good agreement for the creep settlements of the fill under own weight.