Avista GD 2020 Supplemental

NOTICE:This report is required by 49 CFR Part 191. Failure to report can result in a civil penalty not to
exceed 100,000 for each violation for each day that such violation persists except that the maximum civil OMB NO:2137-0629
penalty shall not exceed$1,000,000 as provided in 49 USC 60122. EXPIRATION DATE:10/31/2021
Initial Date 02/09/2021
Submitted:
U.S Department of Transportation Form Type: SUPPLEMENTAL
Pipeline and Hazardous Materials Safety Administration
Date 07/20/2021
Submitted:
ANNUAL REPORT FOR
CALENDAR YEAR 2020
GAS DISTRIBUTION SYSTEM
A federal agency may not conduct or sponsor,and a person is not required to respond to,nor shall a person be subject to a penalty for failure to comply with a collection of
information subject to the requirements of the Paperwork Reduction Act unless that collection of information displays a current valid OMB Control Number. The OMB Control
Number for this information collection is 2137-0629. Public reporting for this collection of information is estimated to be approximately 16 hours per response,including the
time for reviewing instructions,gathering the data needed,and completing and reviewing the collection of information. All responses to this collection of information are
mandatory. Send comments regarding this burden estimate or any other aspect of this collection of information,including suggestions for reducing this burden to:Information
Collection Clearance Officer,PHMSA,Office of Pipeline Safety(PHP-30)1200 New Jersey Avenue,SE,Washington,D.C.20590.
Important: Please read the separate instructions for completing this form before you begin. They clarify the information requested and provide specific
examples. If you do not have a copy of the instructions,you can obtain one from the PHMSA Pipeline Safety Community Web Page at http://www.
hmsa.dot. ov/ i eline/libra /forms.
PART A-OPERATOR INFORMATION I (DOT use only) 202102!''i I I 19
1. Name of Operator AVISTA CORP
2.LOCATION OF OFFICE(WHERE ADDITIONAL
INFORMATION MAY BE OBTAINED)
2a.Street Address 1411 EMISSION AVE
2b.City and County SPOKANE
2c.State WA
2d.Zip Code 99202
3.OPERATOR'S 5 DIGIT IDENTIFICATION NUMBER 31232
4. HEADQUARTERS NAME&ADDRESS
4a.Street Address 1411 East Mission,(PO Box 3727,99220-3727)
4b. City and County Spokane
4c.State WA
4d.Zip Code 99202
5.STATE IN WHICH SYSTEM OPERATES ID
6.THIS REPORT PERTAINS TO THE FOLLOWING COMMODITY GROUP(Select Commodity Group based on the predominant gas carried and
complete the report for that Commodity Group.File a separate report for each Commodity Group included in this OPID.)
Natural Gas
7.THIS REPORT PERTAINS TO THE FOLLOWING TYPE OF OPERATOR(Select Type of Operatorbased on the structure of the company
included in this OPID for which this report is being submitted.):
Investor Owned
PART B-SYSTEM DESCRIPTION
1.GENERAL
STEEL
UNPROTECTED CATHODICALLY CAST/ DUCTILE RECONDITION SYSTEM
PROTECTED PLASTIC WROUGHT IRON COPPER OTHER ED TOTAL
IRON CAST IRON
BARE COATED BARE COATED
MILES OF 0 0 0 534.980 1583.922 0 0 0 0 0 2118.902
MAIN
NO.OF 0 0 0 11766 72170 0 0 0 0 0 83936
SERVICES

2.MILES OF MAINS IN SYSTEM AT END OF YEAR
MATERIAL UNKNOWN 2"OR LESS OVER 2" OVER 4" OVER 8" OVER 12" SYSTEM TOTALS
THRU 4" THRU 8" THRU 12"
534.98
STEEL 0 331.365 116.805 84.491 2.319 0
0
DUCTILE IRON 0 0 0 0 0 0
0
COPPER 0 0 0 0 0 0
CAST/WROUGH 0 0 0 0 0 0 0
T IRON
0
PLASTIC PVC 0 0 0 0 0 0
1583.922
PLASTIC PE 0 1167.770 293.078 123.074 0 0
0
PLASTIC ABS 0 0 0 0 0 0
PLASTIC 0 0 0 0 0 0 0
OTHER
0
OTHER 0 0 0 0 0 0
RECONDITIONE 0 0 0 0 0 0 0
D CAST IRON
2118.902
TOTAL 0 1499.135 409.883 207.565 2.319 0
Describe Other Material:
3.NUMBER OF SERVICES IN SYSTEM AT END OF YEAR AVERAGE SERVICE LENGTH:90
MATERIAL UNKNOWN 1"OR LESS OVER 1" OVER 2" OVER 4" OVER 8" SYSTEM TOTALS
THRU 2" THRU 4" THRU 8"
11766
STEEL 208 11371 179 7 1 0
0
DUCTILE IRON 0 0 0 0 0 0
0
COPPER 0 0 0 0 0 0
CAST/WROUGH 0 0 0 0 0 0 0
T IRON
0
PLASTIC PVC 0 0 0 0 0 0
72170
PLASTIC PE 442 71407 305 12 4 0
0
PLASTIC ABS 0 0 0 0 0 0
PLASTIC 0 0 0 0 0 0 0
OTHER
0
OTHER 0 0 0 0 0 0
RECONDITIONE 0 0 0 0 0 0 0
D CAST IRON
83936
TOTAL 650 82778 484 19 5 0
Describe Other Material: -F
4.MILES OF MAIN AND NUMBER OF SERVICES BY DECADE OF INSTALLATION
PRE- 1940- 1950- 1960- 1970- 1980- 1990- 2000- 2010- 2020-
UNKNOWN 1940 1949 1959 1969 1979 1989 1999 2009 2019 2029 TOTAL

MILES OF 4.912 0 0 90.479 294.788 117.889 95.044 770.165 480.931 230.259 34.435 2118.902
MAIN
NUMBER
OF 1109 0 0 702 6436 4968 5075 29240 19352 15066 1988 83936
SERVICES
PART C-TOTAL LEAKS AND HAZARDOUS LEAKS ELIMINATED/REPAIRED DURING THE YEAR
MAINS SERVICES
CAUSE OF LEAK
TOTAL HAZARDOUS TOTAL HAZARDOUS
CORROSION FAILURE 1 1 1 1
NATURAL FORCE DAMAGE 0 0 8 5
EXCAVATION DAMAGE 32 31 134 132
OTHER OUTSIDE FORCE 2 2 24 21
DAMAGE
PIPE,WELD OR JOINT FAILURE 4 1 16 4
EQUIPMENT FAILURE 11 8 99 1
INCORRECT OPERATIONS 2 1 4 3
OTHER CAUSE 2 2 3 3
rW�MBEROFKNOWN SYSTEM LEAKS AT END OF YEAR SCHEDULED FOR REPAIR:148
PART D-EXCAVATION DAMAGE PART E-EXCESS FLOW VALUE(EFV)AND SERVICE VALVE DATA
1.TOTAL NUMBER OF EXCAVATION DAMAGES BY APPARENT Total Number Of Services with EFV Installed During Year: 1931
ROOT CAUSE: 169
a. One-Call Notification Practices Not Sufficient: 66 Estimated Number Of Services with EFV In the System At End Of Year:
18952
b. Locating Practices Not Sufficient: 19
"Total Number of Manual Service Line Shut-off Valves Installed During
c. Excavation Practices Not Sufficient: 78 Year: 37
d. Other: 6
Estimated Number of Services with Manual Service Line Shut-off Valves
Installed in the System at End of Year: 646
*These questions were added to the report in 2017.
2. NUMBER OF EXCAVATION TICKETS : 42605
PART F-LEAKS ON FEDERAL LAND PART G-PERCENT OF UNACCOUNTED FOR GAS
TOTAL NUMBER OF LEAKS ON FEDERAL LAND REPAIRED OR UNACCOUNTED FOR GAS AS A PERCENT OF TOTAL CONSUMPTION
SCHEDULED TO REPAIR: 0 FOR THE 12 MONTHS ENDING JUNE 30 OF THE REPORTING YEAR.
[(PURCHASED GAS+PRODUCED GAS)MINUS(CUSTOMER USE+
COMPANY USE+APPROPRIATE ADJUSTMENTS)]DIVIDED BY
(CUSTOMER USE+COMPANY USE+APPROPRIATE ADJUSTMENTS)
TIMES 100 EQUALS PERCENT UNACCOUNTED FOR.
FOR YEAR ENDING 6/30: -1 97%
PART H-ADDITIONAL INFORMATION

Part C-81 leaks were carried over from 2019: 10 were repaired in 2020,39 were non-reportable once repaired,30 were found not to be gas leaks once
investigated,and 2 were carried over into 2021 (repaired in January of 2021).Supplement:The percent of unaccounted for gas was updated due to a
miscalculation that was found after the original report was submitted.
PARTI-PREPARER
Brian Schultz,Pipeline Integrity Program Mgr [phone]
(Preparer's Name and Title) (Area Code and Telephone Number)
[e-mail]
(Preparer's email address) (Area Code and Facsimile Number)