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<br />12 <br />1. UPSTREAM SLOPE - Tbis Is th, part of the dam _Is In ,..,lacl <br /> ........ the reservoir water. On euthen dams tlte upsh'Nm dope mUll be <br /> protected from the erosive aetlon ofwaves by rod: rlprap. eonerete 01' <br /> some otlaer material. <br />2. CREST - TIle top part of tile dam. VsuaDy . roadway is estabU1be4 <br /> aUGlIS the crest to provide aecess to the dam for oper.~ Inspection <br /> and mldntenance. <br />3. DOWNSTREAM SLOPE -lbisistheslopeorfaceo,u.edama..y <br /> from the JeSenolr water. This area requires 8O.me form of protection, <br /> such as ~ froiD the erosive effects of rain and surface ftows. <br />4- PRINCIPAL SPILLWAY - Allows dlseharge of w.ter from the <br /> resel'l'Oirwhen the ".ter level exceeds tile top oftbe principal spillway. <br /> Principal spillwa)'s are used to allow small inflows to be released from <br /> the reservoir. <br />5. EMERGENCY SPILL WAY - Allows the inflow from large storms <br /> to be released from the restn'oir before the water level rises hip <br /> enouch to overtop the dam. <br />6. OUTLET DISCHARGE STRUCTURE - This _clur' protects <br /> the downstrealll end of the outlet pipe from eroskm aDd is often. <br /> desiped to dow down the velocity of released ,.,aterto prevent erosion <br /> of the stream eII....e). <br />7. OUTLET CONTROL HOUSE - Proted! the operating mechanism <br /> for tbe outlet control valve from weather and from vandalism. <br />8. ENERGY DISSIPATOR - This structure slows the fast moving <br /> spOlway Bows in order to prevent erosion of the stream eIIannel. <br />9. STILLING BASIN - An area where spillway flows become equal to <br /> stream now velocities. <br />10. OUTFLOW CHANNEL - A natural stream cbannel tbat transports <br /> reservoir releases. <br />11. RESER VOIR - A manmade fadlity for the storage and controUed , <br /> release of water. <br />12. LOG AND SAFETY BOOM - A net like device installed to prevent <br /> 101S, debris or boaters from enterinc a water discharge fa.y. <br />13. GAGE ROD - A measuring device that shows the water level in the <br /> reservoir. I <br />14. HORIZONTAL AND VERTICAL CONTROL POINTS - Tbese <br /> are small monuments that are securely embedded in the surface of the <br /> dam. Any movement of the monument indicates a movement in the <br /> dam itself. Movements are detected by using accurate survey <br /> procedures. <br />15. PERMANENT MONUMENT - Fixed monuments placed away <br /> from the dam which allow movemeuts in the control points to be <br /> observed by using accurate survey procedures. <br />16- PIEZOMETER (OPEN WELL) - Allows the level of saturation <br /> within the dam. to be measured. <br />17. TOE DRAIN AND OUTFALL - Carry seepage water away from <br /> the dam and can allow seepage quantities to be measured. <br />18- ABUTMENT SEEPAGE - Reservoir water that moves through <br /> seams or pores in the natural abutment material and exits as seepale. <br />19. V-NOTCH WEIR - A device for measuring the now of water. <br />200 SEEPAGE OUTFLOW DITCH - A shallow ditch that is excavated <br /> to prevent seepage water from coDecting in ponds. <br />21. ACCESS ROAD - A roadway that provides access to the dam. <br />22. ACCESS GATE - A sturdy cate to prevent unauthorized access and <br /> diseourale vandalism. <br />23. TURN AROUND - Provided for the convenience of maintenance <br /> vehicles. <br />