Laserfiche WebLink
<br />111111111111lIIIIII <br />Dud:,sh, Joe <br />From: Brown, Sandy <br />Sent: Thursday, June 15, 2000 2:33 PM <br />To: Dudash,Joe <br />Cc: Berry, David <br />Subject: Oxbow TR-32, Elk Creek Reconstruction and Drainage Culvert <br />I put a copy of the lastest TR-32 response information on your desk for you to review. (I also took a copy of the hydrology <br />information submitted May 16.) <br />Tom Leidich came in this morning with the information on the extension of Culvert DF in place of Ditch D5. A couple of <br />drop structures were also added. Tom Leidich did not rerun SEDCAD for the culvert, he said the hyrology is the same. <br />Additionally, Ditch DB was added to control drainage along the road. SEDCAD calculations are presented for Ditch D6, <br />and typical channel designs have been added to the table titled, "Elk Creek Mine channel Designs". <br />With respect to the Elk Creek Reconstruction, the following information is relevant. <br />Revised (6/15/00) postmining topography, Drawing 2.05-M6 <br />Revised (6/15/00) D-seam Portal Area Crass-sections <br />The following items are pertinent, but were not revised: <br />Table showing Elk Creek Mine Channel Designs <br />SEDCAD results for the Reclaimed Elk Creek -submitted 2/16/00 <br />Elk Creek Longitudinal Profile 2.05 M7, submitted 5/16/00 <br />Narrative page 2.05-63 (very general, may be revised by J. Nettleton) submitted 5/22/00 <br />I explained our concerns to Tom regarding the reclaimed channel stability. Tom said the entire channel is designed for the <br />100 year 24-hour storm event. The capacity of the reclaimed channel he feels is adequate, and conservatively designed. <br />The entire length of the reclaimed channel will be armored with 9-12" rip rap. Plans for sealing the shafts will be submitted <br />by Jerry Nettleton in the next couple of days. <br />I forwarded an a-mail message I got from Jim Pendleton. He said to call if we have questions, but we are definitely on the <br />right track. Tom L. also encouraged us to call if we have any questions. <br />I asked Kathy Welt what their drop dead date is for this TR. She said they'd Tike to complete the review as soon as <br />possible, but they do not plan to start construction until August. <br />I will be out of the office until Thursday, June 29. I will be checking my voice mail so, please leave a message for me if you <br />have any questions. <br />