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5. Sheets 6 & 7 indicate approximately 2300 linear feet of buried gas pipeline within the existing flood <br />control berm. The exact depth of the pipeline is unknown. Please demonstrate how the operator (VCI) <br />will comply with Rule 6.4.19 during the proposed re-grading and reclamation of the existing flood control <br />berm. The options that the operator may use to comply with Rule 6.4.19 are either <br />a) provide a notarized agreement between the applicant and the person(s) having an interest in the <br />structure, that the applicant is to provide compensation for any damage to the structure; or <br />b) where such agreement cannot be reached, the applicant shall provide an appropriate engineering <br />evaluation that demonstrates that such structure shall not be damaged by activities occurring at the <br />mining operation. <br />6. Review of the engineering cross sectional designs (Sheet 16, Cross Sections, Section EE) indicates that a <br />significant portion of the 2300 linear feet of flood control berm containing the buried gas pipeline will be <br />saturated during a 100-year and a 10-year flood event, As a result, it is likely that there will be differential <br />settling of the berm materials during or after such a flood event. The differential settling, if significant, <br />may affect the structural integrity of the pipeline. In addition, plan view maps (Sheet 6) indicate that the <br />buried gas line is approximately 75-100 feet south of the Cache La Poudre River. Further, it is the <br />Division's understanding that the date of the gas pipeline re-location and exact depth of buried pipeline is <br />unknown. Because of these factors, the Division requests that the operator (VCI) provide a notarized <br />ageement from the owner(s) of the relocated, buried gas pipeline that they have no objection to the <br />proposed berm modification plans. If a notarized agreement from the owner(s) of the relocated, buried gas <br />pipeline cannot be obtained, then the Division requests that the operator (VCI) provide an engineering <br />stability analysis, per Rule 6.5(2), which demonstrates an adequate factor of safety for the modified <br />embankment during and after a major flooding event such as a 100-year flood. <br />7. In accordance with Rule 6.4.12, please provide a detailed, itemized reclamation costs & volumes for the <br />items listed below. (The Division will accept either an estimate with itemized costs or a "Bid Installation <br />Cost" which verifies inclusion of the various items listed below). <br />cost & volume of material to be excavated (river side) <br />cost & volume of material to be scalped off top of berm <br />cost & volume of backfill materials <br />recompaction of excavated berm materials <br />cost of concrete sill installation, & volume <br />contingency cost of muck excavation & replacement w/ suitable foundation materials <br />cost of importation of 12" inch riprap & volume required <br />cost of importation of 18" inch riprap & volume required <br />cost of riprap installation - 12" riprap <br />cost of riprap installation - 18" riprap <br />cost & volume of Type II bedding material <br />cost & volume of woven filter cloth <br />cost of installing riprap end protection <br />cost of installing silt fence, sediment trap, erosion control measures <br />cost of transition bank grading (final grading) <br />cost of de-watering on the Cache La Poudre side of the flood control berm <br />cost of job supervision <br />8. Sheet 6 (Sheet Index CS) indicates approximately 1150 linear feet of riprap installation along the berm <br />outslope/south bank of Cache La Poudre River. Please verify the status of whether these plans for riprap <br />installation are still valid and should be considered as part of the final reclamation for the existing flood <br />