Montana. State Water Projects B urea u Eeadflian's Basin D am DAM DBADMAN'S BASIN MANUAL FOR OPERATION AND MAINTENANCE STATE WATER PROJECTS BUREAU WATER RESOURCES DIVISION DEPARTMENT OF NATURAL RESOURCES AND CONSERVATION P.O. Box 201601 HELENA, MT 59620-1601 Initial Publication December 1993 Revised February 1999 - 3 0864 0014 3541 4 S Montana, State 627.83 Water Projects N7db<ira Bureau 19S9 Dea<tisan*s Basin Dan DATE DUE — MONTANA STATE LIBRARY 1515 East 5th Avenue Helena, MT 59620-1800 JUN U 3 1999 STATE DaCUME^m COLLECTION m 03 1839 MONTANA STATE LfERARY 1515 E. 6th AVE. HELENA, MONTANA 59620 DAM DEADMAN'S BASIN MANUAL FOR OPERATION AND MAINTENANCE STATE WATER PROJECTS BUREAU WATER RESOURCES DIVISION DEPARTMENT OF NATURAL RESOURCES AND CONSERVATION P.O. Box 201601 HELENA, MT 59620-1601 Initial Publication December 1993 Revised February 1999 Digitized by tine Internet Arcliive 2015 in i https://archive.org/details/deadmansbasindam1999mont TABLE OF CONTENTS OVERVIEW 1 Map General Location (Figure 2 1) Project Area Map (Figure 2) 3 General Layout (Figure 3) 4 STATISTICAL INFORMATION 5 OPERATING PROCEDURES 9 Method and Schedule of Operation 9 Safe Drawdown 10 Limitations ofAppurtenances 10 Dam Operator 11 Storage Determination 12 . Weather Monitoring 12 Interaction with Other Dams 12 INSPECTION AND MONITORING 15 Structural Features Inspection 15 Riprap Inspection 16 Seepage Monitoring 16 MAINTENANCE 19 Routine Maintenance 19 Annual Maintenance 20 Record Keeping 20 REFERENCES 21 APPENDICES A. RATING CURVES AND TABLES Al Table Al. SLOPE/ELEVATION/STORAGE TABLE A2 Table A2. ELEVATION/STORAGE TABLE A9 B. INSPECTION REPORT Bl C. MONITORING WELL LOGS CI Revised 1999 i I 1 Revised 1999 OVERVIEW Both the dam and the dike at Deadman's Basin are in Wheatland County adjacent to the county line separating Wheatland and Golden Valley Counties (Figure 1). The project is approximately 9 miles upstream of the town of Ryegate (Figure 2). The reservoir is fed by a supply canal from the Musselshell River. Figure 3 provides a general layout of the dam, dike and gatehouse. Water is delivered to the water users through the Barber and Careless Creek canals. The dam owned by the Montana Department of Natural is resources and Conservation (DNRC). The Deadman's Basin Water Users Association operates the dam. The earthfill dam and dike were completed in 1941. Dam Deadman's Basin is 60 feet high and 1,490 feet long, while the dike is 18 feet high and 2,950 feet long (Figure 3). Enlargement work in 1958 included raising the embankment crest of the dam and dike by 10 feet, and incorporating three original dikes into one. The dam's outlet works consist of a wet tower and two 60-inch by 60-inch cast iron slide gates with controls near the top of the tower. There is no spillway. Water from the reservoir is used primarily for irrigation water supply. The reservoir also is used for water-based recreation. Some cabins are located on the southeast side of the reservoir between the dam and the dike. Revised 1999 1 I! s ^© u o O > t 5 U ca E —c o« ca u Q V S OX) Revised 1999 2 3 Revised 1999