U.S. ARMY ENGINEER DIVISION, PACIFIC OCEAN CORPS OF ENGINEERS PROVECT TITLE _Enewetak Cleanup LOCATION DRAWING (S) NO. compuTep By 1. ___KVK paTe LSNov?6 CHECKED BY SHS DATE DESIGN ANALYSIS ASSUMPTIONS. a. SHNO,.__-__oF____-__ SECTION No catastrophic movement in the coral reef structure (t 5 feet horiz or vert) which will result in disastrous effects (major faulting) is pre- dicted for the next 2,000 vears. b. The mean sea level will vary from 1 foot lower to 5 feet higher than existing MSL over the next 2,000 years. c. Reef material is not removed or excavated (by nature or man) in the vicinity of the crater or seaward of the crater for a distance of 1,200 feet. 2. DESIGN SWL. a. Max wave will occur when sea level Rise in HAO level + is 5" higher than present elev. Existing high water level 4.4 5' = 9! Under this sea level condition, waves will wash completely over the island and there will be a very small wave and wind setup. estimated to be 1 foot. The combined effect is The rise in water surface due to atmosphere pressure drop is estimated to be about 2 feet for a major storm. b. 3. Based on the above the design SWL will be 9+1+2=12'. MNESIGN WAVE. Based on contf¥élling depth eriteria for waves having periods between 15 and 20 seconds, the design wave height will be: 12 =1.27 = 9.5' 4. SCOUR. a. From the report recently provided by the Navy Command, the ground surface around the crater has been severely fractured and the beach rock in = this area is a very thin surface covering over coral, debris and sand. POD Form 115 4 Jui 70 tw wr a due coded pms on a can ee dt: RATASN pete ye a arkT 1, + iSFRI Mate . 7 ATT Ree ..