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INTRODUCTION This report contains the results of water level measurements of wells in the Northern High Plains Designated Basin made during the winter of 1995-1996. Date were collected in cooperation with the W -Y, Frenchman, Central Yuma, Sand Hills, Marks Butte, Arikaree and Plains Ground Water Management Districts, the U.S. Geological Survey and local well owners and users. Funding for this project was supplied in part from well permit fees collected and managed by the Office of the State Engineer as a result of the passage of Senate Bill 200 during the 1987 legislative session. This bill authorized the Office of the State Engineer to establish and maintain a water level monitoring network throughout the state to obtain information on ground water conditions, to establish ground water trends and to manage the ground water resources of the state. The data are tabulated by location within each ground water management district or within counties where no management district exists. The appendices contain information concerning well identification, location, owner's name, land surface elevation, permit number, water level data since 1987, remarks and the change in water level between the 1995 and 1996 measurements as well as a five year change between measurements made in 1991 and the present measurements. Also included are representative hydrographs for approximately five percent (5%) of the measured wells along with a location map. Four hydrographs are also included in Appendix L for wells monitored by the USGS which have continuous recorders installed. Copies of this report are available for inspection in the offices of the local ground water management districts as well as the Office of the State Engineer. Copies can be purchased from the Office of the State Engineer, 1313 Sherman Street, Room 821, Denver, Colorado 80203 for a fee of $ 5.00 to cover the cost of printing and handling. Summary reports will be made available at no cost to each well owner whose well was measured. These summary reports are available from the local districts or from the Office of the State Engineer. DISCUSSION During the winter of 1995/96, 661 wells were measured in the Northern High Plains Designated Basin. An attempt was made to measure all the wells within a six week period beginning approximately in early December 1995. This goal was achieved due to the mild winter throughout the basin. All wells were measured prior to February 11, 1996. By measuring the wells in a short time period, it is hoped that seasonal fluctuations will be dampened and that the hydrographs and comparison of water level change will more accurately reflect the true ground water conditions. The four hydrographs for wells with continuous recorders show that the aquifer