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2000-06-16_PERMIT FILE - M2000002 (5)
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2000-06-16_PERMIT FILE - M2000002 (5)
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Last modified
4/23/2025 12:51:04 PM
Creation date
11/20/2007 3:17:13 PM
Metadata
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Template:
DRMS Permit Index
Permit No
M2000002
IBM Index Class Name
Permit File
Doc Date
6/16/2000
Doc Name
APPLICANTS PRE-HEARING STATEMENT
Media Type
D
Archive
No
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The question of minimizing disturbances to the First Creek floodway and floodplain, as <br />set forth in the draft Order, presents a new objection raised only subsequent to the close of both <br />the public comment period and the informal conference comment period. For this reason, the <br />objection is procedurally flawed and should be precluded from the final Pre-Hearing Order. <br />2. Mining and reclamation on the Tanabe property will minimize <br />impacts on the prevailing hydrologic balance, and, in fact, may <br />provide benefits to surface flood flows. <br />Section 34-32.5-116(4)(h), C.R.S. requires that "[d]isturbances to the prevailing <br />hydrologic balance of the affected land and surrounding azea ....both during and afrer mining . <br />.. be minimized." There is no evidence in the record that mining and reclamation proposed for <br />the Tanabe property will disturb the prevailing hydrologic balance. In fact, disturbances to the <br />First Creek floodplain will be minimized during mining and reclamation activities, and may <br />provide flood flow detention that would be beneficial to the floodplain. <br />There is no delineated First Creek floodway as per the Flood Insurance Rate Map, Adams <br />County Panel 45, 08-OO1C-0045-G see Exhibit D). Operations within the 100-yeaz floodplain <br />will be restricted to approximately 2.3 acres and no mining or reclamation activities will take <br />place in the main First Creek channel. <br />Stockpiles and other fill material, which may typically impede flood flows, will not be <br />placed within the floodplain. Disturbances within the floodplain will be limited to excavation <br />and aggregate washing activities in which the land surface elevation will be unchanged or <br />decreased from the original topography. In azeas where the original topography remains <br />unchanged, impacts to the floodplain aze not anticipated. Where excavation is expected to lower <br />the land surface elevation relative to the original topography, it is likely that additional flood <br />flow storage volume will be added to the floodplain. Although the addition of any storage <br />volume to the floodplain from mining or reclamation activities would be coincidental and not a <br />proposed function of the project, during a 100-year flood event the added storage would be <br />expected to contribute to a decrease in peak flows down stream of the proposed project. <br />Within the First Creek floodplain the surface elevation of Brighton Road is <br />approximately 5047 amsl. To the north, and adjacent to the proposed project site, the surface <br />elevation of Brighton Road increases to approximately 5053.5 amsl at the northern end of the <br />proposed Phase I. It is expected that, due to the increased surface elevation of Brighton Road <br />adjacent to the proposed project and the lack of fill material being added to the floodplain area, <br />the 100-year flood flows would continue to be confined to the present floodplain crossing the <br />road. Therefore, impacts to adjacent lands downstream of Brighton Road because of a change in <br />flood flow routing across the road are not anticipated. <br />Finally, it should be noted that MPC is in the process of obtaining a floodplain permit <br />from Adams County. Therefore, all mining and reclamation will be undertaken by MPC in <br />conformance with this approval. <br />7 <br />
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