2017-03-23_REPORT - M1992069

• Permit No: M1992069
• IBM Index Class Name: Report
• Doc Date: 3/23/2017
• Doc Name: Technical Review
• From: Boyd Irrigation Company
• To: DRMS
• Email Name: PSH
• Media Type: D
• Archive: No

WWE
Wright Water Engineers, Inc.
2490 West 26th Ave.,Suite 100A www.wrightwater.com
Denver,Colorado 80211 e-mail:[e-mail]
[phone] TEL
[phone] FAX
March 15, 2017
Via email: [e-mail]
Mr. Roger Schmidt
President, Boyd Irrigation Company
1100 10'' Street, Suite 300
Greeley, Colorado 80631
Re: Response to Comments Provided by the Division of Reclamation, Mining and Safety and
Aggregate Industries Regarding the 83rd Joint Venture Pit
Dear Mr. Schmidt:
This letter, prepared by Wright Water Engineers, Inc. (WWE) on behalf of the Boyd Irrigation
Company (BIC), addresses the BIC's flood damaged pipeline for the Boyd-Freeman Ditch. The
damaged pipeline section is located north of F Street and west of the 83`d Joint Venture gravel pit
owned by Aggregate Industries.
The information in this letter supplements an initial letter report prepared by WWE on this
subject, dated September 2, 2016 and titled "Engineering Evaluation of Nature and Causes of
Erosion in Agricultural Field Adjacent to Boyd Irrigation Company Pipeline and Damage to
Pipeline." That report provides a description of the factors and events that contributed to the
damage of the BIC pipeline on three occasions, from 2010 through 2014, and the subsequent
repairs that were made by the BIC. The September 2016 WWE report also includes a chronology
of events which is included with this letter for reference (see Appendix A). It is noteworthy that
the most recent repair by the BIC, which was completed in 2016, was after the most recent flood
event that damaged the BIC pipeline, which occurred in 2014. The timing of the 2016 repair is
relevant to the discussion below.
Individuals involved with the preparation or review of the September 2016 WWE letter report
and this letter are Ian Paton, P.E. and Jonathan Jones, P.E. from WWE and Ben Urbonas, P.E.
(outside reviewer to WWE). Specifically, this letter was prepared by WWE in response to:
1) The Minerals Program Inspection Report prepared by the Colorado Division of
Reclamation, Mining and Safety (DRMS), signed on December 14, 2016, which was written
following an inspection conducted on July 12, 2016.
2) A letter from Aggregate Industries (Al), dated January 12, 2017, titled, "Permit M-1992-
069—83'd Joint Venture Pit, July 12, 2016 Inspection (Signature Date December 14, 2016),
Corrective Action Response" which also has an attached letter from Tetra Tech (engineering
consultant to Aggregate Industries), dated January 11, 2017, titled "Colorado Division of
Reclamation and Mining Safety Facility Inspection on July 12, 2016 (signature date
GLENWOOD SPRINGS DURANGO
[phone] TEL [phone] FAX [phone] TEL [phone] FAX