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2009-04-29_PERMIT FILE - C1982056 (6)
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2009-04-29_PERMIT FILE - C1982056 (6)
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Last modified
8/24/2016 3:45:58 PM
Creation date
5/19/2009 1:58:37 PM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
C1982056
IBM Index Class Name
Permit File
Doc Date
4/29/2009
Doc Name
(Refer to Figures EX49R-F2 and F5)
Section_Exhibit Name
Exhibit 25Y 18-Left Mine Ventilation Shaft Installation Foundation & Road Investigations (TR66)
Media Type
D
Archive
No
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• <br />• <br />?J <br />erratically, resulting in conditions, which cannot always be predicted. The recommendations presented in <br />this report are based on the current state of the art for foundations and floor slabs on swelling soils. The <br />owner should be aware that there is a risk in construction on these types of materials. Performance of the <br />structures will depend on following the recommendations and in proper maintenance after construction is <br />complete. As water is the main cause for volume change in these soils, it is necessary that the changes in <br />moisture content be kept to a minimum. This requires judicious irrigation and providing positive surface <br />drainage away from the buildings. Any distress noted in the buildings should be brought to the attention of <br />a professional engineer. <br />This report is based on the investigation at the described site and on the specific anticipated construction as <br />Stated herein. If either of these condition-, is changed, the re-,111te would 9..lF:n most likely change. We also <br />strongly recommend that our firm be contacted prior to finalizing the construction plans so that we can <br />verify that our recommendations are being properly incorporated into the building plans. <br />Man-made or natural changes in the conditions of a property can also occur over a period of time. In <br />addition, changes in requirements due to state of the art knowledge and/or legislation do from time to time <br />occur. As a result, the findings of this report may become invalid due to these changes. Therefore, this <br />report is subject to review and not considered valid after a period of 3 years or if conditions as stated above <br />are altered. <br />It is the responsibility of the owner or his representative to insure that the information in this report is <br />incorporated into the plans and/or specifications and construction of the project. It is advisable that a <br />contractor familiar with construction details typically used to dealing with the local subsoil and climatic <br />conditions be retained to build the structures. If there are any further questions concerning this report or if <br />we may be of further service, please contact <br />Sincerely, <br />NWCC, INc. <br />Josh P. Frappart, I.T. <br />Reviewed by Brian D. Len, P <br />' 25 <br />• ? o <br />Q <br />° <br />IlduA? <br />cc: Matt Florence - Twentymile Coal Company <br />Job Number: 08-8241 <br />NWCC, Inc. <br />Page 13
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