2013-09-18_PERMIT FILE - M2013064 (8)

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Exhibit D- Mining Plan Conditions. Exhibit S — provides certification from a registered professional engineer that these structures will not be harmed by planned operations; nor has any evidence of harm evidenced itself over the nearly 60± years of operations at the adjacent Durham Project. A 1600± linear foot standard morphing extraction front is comprised of a 1.25H:1V face along an approximate 800 -1200± linear foot advancing; wall with trailing side slopes up to 400 total linear feet combined along either side of the advancing wall where it serves to define the predetermined boundary of the extraction limits shown on Exhibit C -2: Extraction Plan Map. Concurrent grading follows immediately behind the trailing side slopes as they occur along the extraction limits. This morphing extraction front, with its advancing wall, trailing side slopes, and concurrent reclamation along the extraction limits is approximate for all active Tracts. The 1600± linear foot total extraction front is `morphing' in that the total linear feet of the front will not exceed 1600± linear feet, however, the advancing wall and side slopes may deviate from the `standard' lengths described above. For example: If the advancing wall is only 600± linear feet, trailing side slopes may have a combined length pending finished grading of up to 1,000± linear feet. Another example is if the advancing wall is 1,400± linear feet long, there is only 200± linear feet of trailing wall, and operations must be more Johnny on the spot in keeping up with concurrency in this configuration. So the `morphing of the front generally affects the pace of concurrent reclamation of the trailing wall. Extraction activities will continue to remove aggregate from approximately 33± feet along the southwest, to a mean depth of 40.0± feet at center, with a potential total depth to 47± feet near the center of extraction activities from 16th Street to the Cache La Poudre River. Since anomalous depths greater than 40± feet may occur, any extraction deeper than 40± feet in depth may be extracted either dry, or wet. If extracted wet, a dredge may be utilized for the removal. Regardless, all final basin (pond) slopes will conform at a minimum to Rule 3.1.5(7). The general direction of extraction activities over the Fields is shown on Exhibit C -2: Extraction Plan Map. Extraction will occur no closer than 10± feet from the permit boundary, man -made structures, easements and right -of -ways; except for well heads and above ground oil and gas facilities. Extraction will occur to within 25± feet of well heads and related above ground facilities. Extraction around well heads will be concurrently backfilled to maintain a 100± foot buffer from the balance of extracted lands. At all times, safety will take precedent and over -ride all other conditions in time with a matter of safety or emergency respective to and all aspects of the approved permit. Fields are used instead of Phases to describe the activities, since each Field can be accessed concurrently instead of sequentially with the other; and per Exhibit L — Reclamation Costs, accelerated extraction only serves to decrease the overall Varra Companies, Inc. Varra- Coulson Resource Project 4 OMLR 112 Permit Application 8 August 2013