20180208PAC to Staff WY RMSC Set 3 (1-3).pdf

ROCKY MOUNTAINPOWER
A DIVlSION OF PACIFICORP 1407 W North Temple,Suite 330
Salt Lake City,Utah 84116
January 31,2018
Brandon L.Jensen
BUDD-FALEN LAW OFFICES,LLC
300 East 18th Street
Post Office Box 346
Cheyenne,Wyoming 82003-0346
[e-mail] (C)
RE:Wyoming Docket 20000-520-EA-17
Rocky Mountain Sheep Company 3rd Set Data Request (1-3)
Please find enclosed Rocky Mountain Power's Responses to RMSC 3rd Set Data Requests 3.1-
3.2.The response to RMSC 3.3 will be provided separately.
Sincerely,
Stacy Splittstoesser,
Manager,Regulation
Enclosures
C.C.:Meridith Bell/WPSC [e-mail](C)
Lori L.Brand/WPSC [e-mail] (W)
John Burbridge/WPSC john.brubrideralwyo.gov (W)
Michelle Bohanan/WPSC [e-mail] (W)
Kara Seveland/WPSC [e-mail](W)
Morgan Fish/WPSC [e-mail] (W)
Dave Walker/WPSC [e-mail] (W)
Perry McCollom/WPSC [e-mail](W)
Abigail C.Briggerman/WIEC [e-mail]
Patti Penn/WIEC [e-mail](W)
Thor Nelson/WIEC [e-mail] (C)(W)
Emanuel Cocian/WIEC [e-mail](W)
Nik Stoffel/WIEC [e-mail] (W)
Adele Lee/WIEC [e-mail] (W)
Christopher Leger/OCA [e-mail] (C)
Crystal J.McDonough/[e-mail] (C)
Callie Capraro/NLRA [e-mail]
Lisa Tormoen Hickey/[e-mail] (C)
Roxane Perruso/TOTCO [e-mail]
Jane M.France/TOTCO [e-mail] (C)
Constance E.Brooks/Anadarko [e-mail] (C)
Danielle Bettencourt/Anadarko [e-mail](C)(W)
Paul Kapp/Anadarko [e-mail] (C)
Lisa Christian/TOTCO [e-mail] (C)
J.Kenneth Barbe/[e-mail] (C)
20000-520-EA-17 /Rocky Mountain Power
January 31,2018
RMSC Data Request 3.1
RMSC Data Request 3.1
Rocky Mountain Power currentlyowns two existing 230-kV transmission lines on
property owned by Rocky Mountain Sheep Company in Carbon County,Wyoming.If the
CPCN is awarded and the 500-kV transmission line (Aeolus to Anticline)is built as
intended,please advise your intention regarding the two existing 230-kV transmission
lines.Will they be discontinued or abandoned by Rocky Mountain Power?Will they be
sold or assigned?Will they be removed,and the land reclaimed?Please be as specific as
possible.
Response to RMSC Data Request 3.1
With the addition of the D.2 Project (Bridger/Anticline-Aeolus),no existing 230
kilovolt (kV)transmission facilities will be taken out-of-service.Relative to property
owned by Rocky Mountain Sheep Company (RMSC)in Carbon County,Wyoming,the
Platte -Standpipe 230 kV line crosses RMSC property in two locations (see diagram
below)and will remain in-service followingthe completion of the D.2 Project.This
transmission line is utilizedby Rocky Mountain Power to move power from east to west
across Wyoming.
Standpipe 230 kV line
Respondent:Craig Quist /Robyn Kara
Witness:Rick Vail
20000-520-EA-17 /Rocky Mountain Power
January 31,2018
RMSC Data Request 3.2
RMSC Data Request 3.2
The proposed route of the 500-kV transmission line (Aeolus to Anticline)passes over
two existing livestock water wells and stock tanks on property owned by the Rocky
Mountain Sheep Company.Please state,in as much detail as possible,how you intend to
protect existing water wells and livestock watering facilities from corrosion,electrical
currents induced by the electromagnetic field,or any other known adverse impacts.
Response to RMSC Data Request 3.2
PacifiCorp is committed to safe operation of the transmission lines,in all aspects,
including mitigation for AC Interference.For the Aeolus to Jim Bridger 500 kilovolt
transmission line,the conductor ground clearance will meet or exceed the requirements
of the National Electric Safety Code (NESC).In locations where facilities closely
parallel the transmission line for some distance and are constructed of conductive
materials,there exists a potential for induced voltage on such facilities.Generally,wells
and livestock watering facilities have not been noted to experience induced voltage from
extra high voltage transmission lines.PacifiCorp's practice regarding mitigation of
induced voltage on facilities is to measure the voltage and ground the facilities as
required.Grounding prevents both electric shock and AC corrosion.Such remedies
could be applied to wells and livestock watering facilities in the event induced voltage is
measured on such facilities.
Respondent:Todd Jensen
Witness:Rick Vail