City Council Minutes 1976 06 01 - Laserfiche WebLink

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ATTORNEY MORRIS The ~rinciple interest of course is in the subs~dence hazard area. In our discussion with Mr. Mizel for the Colo. Tech. Center, we agreed to do a complete study which would define the mineral resources and any other engineering geological problems such as soils which might be considered or developed in the area. We have tried to fulfill all of the obligations or answer all the questions that might be raised under SB 35, HB 1041, and HB 1525. The first map that we have here is an engineering geological resource map of the CTC. Most of the area is covered with a aluvium or stream deposit consisting of silt and sand and clay. We have made 12 small borings. The results of those borings and tests for expansive soil and corrosive soil are negative. There will be no great prob- lem with the soils with development. We do have a minor problem with a high ground water table in a certain area, which will have to be considered as a foundation prob- lem when they build buildings or design buildings in that area. The only mineral re- source is a small corner of property right in here which falls on Coal Creek flood plain. And this is contained within the CTC. Dr. Robinson, for the record, when you point to a place like that would you say the easterly southerly portion of it so the record will be clear. COLO. TECH. CENTER CONT'D DR. ROBINSON This is in the northwest most corner of the property in the flood plain of Coal Creek. There are gravel deposits, which if developed, with the rest of the gravel deposits could be considered economical. But, within the limits of the CTC's property alone would not be a deposit the size enough to be of economical importance at this time. Another possible mineral resource would be the unmined coal. The area was underlaned by coal and has been mined extensively. An evaluation of what is left on the areas which are not undermined we had available (of course these are mine maps from the Bureau of Mines), and we had drill logs available from the Rocky Mountain Fuel Co. It is our conclusion that there is no coal left which would be economic to mine at the present time. To open up these mines and go after the remaining pillars, the marginal coal which still underlies this land would be too costly to be profitable under the present conditions or forseeable conditions. So, -5-