NOAA ENCŪ NATIONAL OCEANIC AND ATMOSPHERIC ADMINISTRATION US5CA99M - LAKE MEAD INDEX: SOUNDING DATUM LAKE LEVELS, WATER DEPTHS AND ELEVATIONS AUTHORITIES NOTE A CAUTION WARNING - PRUDENT MARINER CAUTION MARINE WEATHER INFORMATION RULES OF THE ROAD (ABRIDGED) POLLUTION REPORTS RADAR REFLECTORS REEF MARKERS (CAUTION! ALL REEFS ARE NOT MARKED) AIDS TO NAVIGATION HOOVER DAM ADMINISTRATION TIDAL INFORMATION ADDITIONAL INFORMATION NOTES: SOUNDING DATUM Soundings refer to a normal lake level elevation which is 1160 feet above Mean Sea Level. LAKE LEVELS, WATER DEPTHS AND ELEVATIONS The 1100 foot elevation (60 foot depth curve) represents a low lake level. The 1160 foot contour represents the normal lake level. The 1200 foor contour represents a high lake level. The areas between the coastline and the 60 foot depth contour represents elevations between 1100 and 1160 feet above Mean Sea Level. The marsh areas represent elevations between 1160 and 1200 feet above Mean Sea Level. Contour values indicate elevations in feet above Mean Sea Level. AUTHORITIES Surveys by the Geological Survey, Soil Conservation, and the National Ocean Service, Coast Survey. NOTE A Navigation regulations are published in Chapter 2, Coast Pilot 7, or weekly Notice to Mariners which include new or revised regulations. Additional Information may be obtained from the Superintendent, Lake Mead National Recreational Area, National Park Service. Refer to section numbers shown with area designation. WARNING - PRUDENT MARINER The prudent mariner will not rely solely on any single aid to navigation, particularly on floating aids. See U.S. Coast Guard Light List and U.S. Coast Pilot for general information, and Superintendent, Lake Mead National Recreational area, National Park Service, for specific details. CAUTION Frequent changes in aids to navigation can be expected because of fluctuation in lake level. Current information may be obtained at the Park Headquarters or Ranger Office. MARINE WEATHER INFORMATION The National Park Service communications center makes twice daily weather broadcasts of weather conditions in the Lake Mead area. The broadcasts are on marine VHF station KOJ 719 channel 22A (157.1 MHz) located at 35°58'40"N., 114°50'15"W. With prior notice of the broadcasts being made on marine safety and emergency channel 16 (156.8 MHz) so that vessels may switch to channel 22A and listen to the broadcasts. RULES OF THE ROAD (ABRIDGED) Motorless craft have the right-of-way in almost all cases. Sailing vessels and motorboats less than sixty-five feet in length, shall not hamper, in a narrow channel, the safe passage of a vessel which can navigate only inside that channel. A motorboat being overtaken has the right-of-way. Motorboats approaching head to head or nearly so should pass port to port. When Motorboats approach each other at right angles or obliquely, the boat on the right has the right-of-way in most cases. Motorboats must keep to the right in narrow channels, when safe and practicable. Mariners are urged to become familiar with the complete text of the Rules of the Road in U.S. Coast Guard publication "Navigation Rules". For emergencies call KOJ719 (National Park Service) on marine band channel 16. POLLUTION REPORTS Report all spills of oil and hazardous substances to the National Park Service (702) 293-8932. RADAR REFLECTORS Radar reflectors have been placed on many floating aids to navigation. Individual radar reflector identification on these aids has been omitted from this chart. REEF MARKERS (CAUTION! ALL REEFS ARE NOT MARKED) Numerous reefs, many of which are submerged, are marked by spar buoys. These are painted white with orange bands at top and bottom and an orange diamond. Buoys mark the edges of reefs. AIDS TO NAVIGATION Aids to Navigation on Lake Mead are maintained by the National Park Service. Lights are two types, fixed and movable. Fixed lights are permanently located above any probable lake level. Movable lights are located when the lake height requires. HOOVER DAM The boulder Canyon Project Act, passed in 1928, authorized the Bureau of Reclamation, U.S. Department of the Interior, to construct Hoover Dam. Work began in 1931, and the structure was dedicated in 1935. It is the tallest dam in the Western Hemisphere, rising 726.4 feet from the base rock to the roadway on top. Its crest is 1,244 feet long. ADMINISTRATION Lake Mead National Recreation Area, established October 8, 1964, is administered by the National Park Service, U.S. Department of the Interior. The National Park System, of which this area is a unit, is dedicated to conserving the scenic, scientific, historic, and recreational heritage of the United States for the benefit and enjoyment of its people. A Superintendent, whose address is 601 Nevada Highway, Boulder City, Nevada 89005, is in immediate charge. TIDAL INFORMATION For tidal information see the NOS Tide Table publication or go to http://co-ops.nos.noaa.gov. ADDITIONAL INFORMATION Additional information can be obtained at www.nauticalcharts.noaa.gov. END OF FILE