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TABLE 5 <br />IMPOUNDMENT HAZARD ANALYSIS SUMMARY <br />IMPOUNDMENT HAZARD SPILLWAY FREEBOARD <br /> CLASSIFICATION/BASIS CAPACITY EVALUATION <br /> EVALUATION BASISI/RESULT/ <br /> BASISVRESULT FREEBOARD <br />Streeter Pond (001A) B/Proximity to State Highway Class B/Ok Class B/Ok/0.25' <br /> 13 <br />Work Area Pond (002A) A/Agricultural Land Class B/Ok Class B/Ok/1.55' <br />Gossard Pond (003A) A/Agricultural Land Class B/Ok Class B/Ok/6.46' <br />Gulch A Pond (004A) A/Agricultural Land Class B/Ok Class B/Ok/0.16' <br />Stoker Siding Pond A/Agricultural Land Class B/Ok Class B/Ok/3.64' <br />(005A) <br />Rail Loo Pond (006A) A/Agricultural Land Class B/Ok Class B/Ok/1.82' <br />Prospect Pond (007A) B/Proximity to State Highway Class B/Ok Class B/Ok/0.61' <br /> 13 <br />West Pit Pond (008A) A/Agricultural Land Class B/Ok Class B/Ok/2.47' <br />Section 16 Pond (009A) B/Proximity to State Highway Class B/Ok Class B/Ok/0.96' <br /> 13 <br />East Taylor Pond (O1 OA) A/Agricultural Land Class B/Ok Class B/Ok/0.76' <br />Taylor Pump Holding A/Agricultural Land Class B/Ok Class B/Ok/0.91' <br />Pond <br />Notes: 1 Spillway capacity and freeboard for all ponds were evaluated for a uniform worst-case <br />hazard classification (Class B) <br />The results of the WWC impoundment hazard analysis indicate that emergency spillway capacities and <br />available freeboard for all existing ponds are adequate to affect full compliance with applicable <br />requirements under the guidelines of TR-60, based on the applicable hazard classifications. Given this <br />confirmation of compliance, no modifications to the existing emergency spillway structures are required. <br />5.0 POND DESIGN EVALUATION RESULTS <br />The results of the pond design analyses are summarized in Table 6. The supporting SEDCAD4 analyses <br />and watershed maps are presented as attachments in each of the individual pond design sections <br />Exhibit 7 Page 7 Revision Date: 6/19/09 <br />Revision No.: TR-73