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F)' Newmont I County Road 82 Guardrail Analysis <br /> J Technical Memorandum <br /> Technical Memorandum <br /> Date: Tuesday, January 17, 2017 <br /> Project: CR 82 Roadside Safety Assessment <br /> To: Erik Munroe, Newmont; Cheyne Mann, Newmont <br /> From: Robert Manzanares, HDR, PE; Cory R Beasley, HDR, PE <br /> Subject: County Road 82 Guardrail Analysis (Response to Comment#51) <br /> 1 Background <br /> The purpose of this technical memorandum is to provide analysis of current roadside conditions <br /> on County Road 82 (CR82) to determine if the current ditch and roadside safety meets the <br /> AASHTO Roadside Design. The task was to assess the existing roadside clearance and provide <br /> a professional engineering opinion if the existing conditions warranted additional barrier (i.e. <br /> guardrail or berm)to protect the traveling public from the vertical hazards associated with the <br /> East Cresson Mine -Wildhorse Extension (WHEX). The location of CR82 in of analysis is <br /> approximately half a mile east of the Ironclad mine entrance and extends 1200 feet east to the <br /> overlook pull off area, see Figure 1. <br /> The Department of Reclamation, Mining and Safety (DRMS) has requested the following: <br /> "Please provide a rigorous demonstration, certified by a Colorado licensed professional <br /> engineer who is experienced with traffic safety appurtenances, which confirms the 15-20 <br /> foot wide ditch is sufficient to protect the public from the vertical hazards associated <br /> with the WHEX along CR82 or propose an alternate barrier (e.g., guardrail or berm) that is <br /> adequately protective." <br /> ' ,,�:�:TCR82E <br /> 1 �yfy,.i ffi jTN`{ <br /> 1 ' Y <br /> \ 17 <br /> viv <br /> AREA OF ANALYSIS N <br /> '.. y <br /> Neasek <br /> t� ,s :, <br /> WHEX HIGHWALL <br /> (:440-tile;J <br /> _ . <br /> ✓ - I T OVERLOOK PARKING <br /> IRONCLAD ENTRANCE roelyd <br /> a .;AY t NOT TO SC ALE sli .t • <br /> a, <br /> Figure 1 <br /> hdrinc.com 2060 Briargate Parkway,Suite 120,Colorado Springs,CO 80920-1045 <br /> (719)272-8800 <br /> 1 <br />