2004-08-04_REVISION - M1978056

• Permit No: M1978056
• IBM Index Class Name: Revision
• Doc Date: 8/4/2004
• Doc Name: Reply to 2nd Adequacy Review Comments of 9 June 2004
• From: Varra Companies Inc.
• To: DMG
• Type & Sequence: AM1
• Media Type: D
• Archive: No

TO: Chris V~arr~a and Brad Janes, Varra Companies, Inc.
FROM: Chris Q~Patz~ P.E., Anderson Consulting Engineers, Inc.
SUBJECT: Durham Pib 117 Cache ]a Poudre River -Reply to 2"d Adequacy Review
Comments [ACE Project No. COVC03]
DATE: July 6, 2004
The following are Anderson Consulting Engineers, Inc.'s comments and responses for
inclusion in your reply to DMG slated for delivery on July 1, 2004. Our responses are
presented and numbered following the ordering system in DMG's June 9a' , 2004 letter.
Four copies of each exhibit, for inclusion with these responses, are attached to this memo.
6.4.5 EXIIIBTT E -Reclamation Plan
16. Flood ControllMitigation Plan:
A Flood Control/Mitigation Plan will be prepared by Anderson Consulting Engineers,
Inc. The plan will include: a) final site reclamation grading; b) final grading and design
details for any portion, if any, of the dike to remain in place; and c) final grading and
design details for any controlled spill locations. The plan will include recommendations
and details for erosion control on the site including: a) at selected locations along the
right bank of the Cache la Poudre River on Varra Companies, Inc. property; b) at any
controlled spill locations; and c) along the edges of the proposed reclaimed pond if
required.
The following process is recommended for the completion the Flood Control/Mitigation
Plan:
A. Develop a preliminary Flood Contro]/Mitigation Plan. The plan will include
preliminary design concepts and costs for mitigating identified flooding issues
(i.e., lowering the berm and/or controlled spill structures) and erosion issues (i.e.,
bank protection, grade controls, etc.);
B. Perform hydraulic analyses in support of the Flood Control/Mitigation Plan;
C. Submit the hydraulic analyses and Flood ControUMitigation Plan in the form of a
Conditional Letter of Map Revision (CLOMR) to Weld County and FEMA for
their conditional review;
COVC03 ACE 2nd Adequacy Rvw Commrnts mml.doc 7/6/2004