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NewFields <br /> Perspective.Vision. Solutions. <br /> TECHNICAL MEMORANDUM 9400Station Street,Suite 300 <br /> Lone Tree,CO 80124 <br /> T:720.508.3300 <br /> F: 720.508.3339 <br /> To: Ron DiDonato (cc , <br /> From: Jay Janney-Moore and R. Michael Smith, P.E. RE�CcIv <br /> Project: Squaw Gulch VLP A<4 �0 ,ft R <br /> UG <br /> Project No: 475.0106.006 DIV/SIO/V 08 2016 <br /> Subject: Phase 2 Sediment Pond Jurisdictional Dam Evaluation M/N/NG,4 DA4f <br /> Date: 8 August 2016 TY <br /> / ZZ S <br /> In response to a request from Newmont Mining Corporation (Newmont), NewFields MDTS <br /> (NewFields) has reviewed various prescriptive parameters (dam height, volume stored and <br /> impoundment area at full pool elevation) for the as-built configuration of the Phase 2 Sediment <br /> Pond associated with Squaw Gulch VLF to determine if this structure should be categorized as a <br /> Jurisdictional Dam. Based on native and as-built survey data and engineering evaluation <br /> described herein, the subject dam is not a "Jurisdictional Dam" as described by the State of <br /> Colorado, Department of Natural Resources, Division of Water Resources, Office of the State <br /> Engineer, Dam Safety Branch, Rules and Regulations for Dam Safety and Dam Construction, <br /> effective January 1, 2007. <br /> The three principal criteria that are used to determine whether a dam structure is Jurisdiction <br /> or not are summarized along with as-built parameters in Table 1 below, and on Figure 1 <br /> (attached). <br /> TABLE 1—AS-BUILT vs JURISDICTIONAL DAM MEASUREMENTS <br /> Criteria As-built Value Jurisdictional Value Jurisdiction Y/N <br /> Capacity(acre-feet) 12.07 Greater than 100 N <br /> High Water Surface Area (acres) 0.90 Greater than 20 N <br /> Height of Dam (feet) 6.5 Greater than10 N <br /> Page 1 <br />