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with the natural drainageway and a riprapped stilling basin or apron at the <br />principal spillway outlet. (See "Stipulations" in this section of the TEA). <br />Embankment Elevation <br />All the embankments will be constructed with a minimum freeboard of one foot <br />between the design flow depth in the emergency spillway and the top of the dam <br />(see Maps 34, 78, 79, and 80 of the permit application). <br />Dam Settlement <br />The embankment is to be constructed a minimum of six inches or five percent <br />higher than design grade (whichever is greater) to allow for settlement (See <br />Map 78 and Illustration 18 of the permit application). <br />Embankment Width <br />All embankment widths were checked and it was found that they exceed the re- <br />quirement that the top width be greater than (H±35)/5, where H=the embankment <br />height. Top widths for the Refuse Disposal area ponds are designed at ten feet <br />and the D-Portal pond dam has a top width of 15 feet (see Maps 34, 78, 79, and <br />80 of the permit application). <br />Embankment Slopes <br />The D-Portal pond embankment will have sideslopes of 3h:ly on the up and down- <br />stream faces. The Refuse Disposal area dams will have sideslopes of 3h:ly up- <br />stream and sideslopes of 2h:ly downstream. These specifications meet the re- <br />quirement that the sideslopes combined be equal to or greater than 5:1 (see <br />Maps 34, 78, 79, and 80 of the permit application). <br />Embankment Construction <br />Illustration 18 of the permit application is the geotechnical investigation and <br />analyses performed by Chen and Associates. Their design specifications, and <br />those noted on Map 78, indicate that all embankment foundations will be proper- <br />23 <br />