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HYDRO28913
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HYDRO28913
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Last modified
8/24/2016 8:48:00 PM
Creation date
11/20/2007 10:04:41 PM
Metadata
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Template:
DRMS Permit Index
Permit No
M1974015
IBM Index Class Name
Hydrology
Doc Date
12/17/1999
Doc Name
FLOODPLAN IMPACT ANALYSIS FOR LYONS PIT ROCKIN WP SAND & GRAVEL MINING & RECLAMATION PLAN
Media Type
D
Archive
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<br />Table of Contents <br />I. Intoduction .....................................................................1 <br />II. Analysis and Design Guidelines ............................................1 <br />IIl. Existing St. Vrain Creek and Floodplain .................. ...............2 <br />IV. Impacts of Mining aad Reclamation on the Floodplain ...............4 <br />V. Off-Site Impacts ............................................... ...............5 <br />VL Recommended Mitigation Measures ....................... ..............5 <br />VII. Summary and Conclusions ................................... ..............8 <br />VIII. Bibliography and References ................................ ..............9 <br />List of Fieures <br />• <br />Figure 1, Existiug 100-Year Floodplain Map <br />Figure 2. Reclamation Contour Map and 100-Year Floodplain <br />Figure 3A. Location of Insufficient Bank Setbacks-East Plant Pit <br />Figure 3B. Locatiou of Insufficieut Bauk Setbacks-West Plant Pit <br />Figure 4. Typical Rip-Rap Slope Protection <br />Figure 5, Typical Rip-Rap and Vegetation Slope Protection <br />Figure 6, Rip-Rap Spillway Stabilization <br />• <br />
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