NC0037834_Annual Performance Report_20170825

Winston-Salem i Forsyth County
tCity/County
Water, Sewer • Solid Waste Disposal August 25, 2017
Utilities
Administration
City of Winston-Salem
P O Box 2511
Winston-Salem, NC 27102
City Link 311 (336 727 8000)
Fax [phone]
tuww crtyofws org
Call 311 or 336-727-8000
cityllnk@cityofws org
Mr. Jeff Poupart, Supervisor
North Carolina Department of Environmental Quality
PERCS Unit
1617 Mail Service Center
Raleigh, North Carolina 27699-1617
Re: 2016-2017 System Performance Report
Winston-Salem/Forsyth County Utilities
Dear Mr. Poupart:
RECEIVEDUDENWR
SEP 01 2017
Water Quality
Permitting Section
Attached are the original and two copies of the annual performance report for the Winston-
Salem/Forsyth County Utilities wastewater collection and treatment system as mandated by
the North Carolina Clean Water Act of 1999. This report covers the period from July 1, 2016
through June 30, 2017.
This report is being made available to the public by publishing a "notice of availability" in
the Sunday, September 3, 2017 Winston-Salem Journal and a notice is being included in each
of our water and sewer bills informing our customers as to how they can obtain a copy of the
report. You will find a copy of the advertisement of the notice attached. In addition, the
report is being posted on our website and a copy made available at the Forsyth County Public
Library.
Please call me at [phone] if you have any questions regarding this matter
or
PC: Corey Basinger, WSRO
Damon Dequenne, Deputy Utilities Director
Frank Crump, Wastewater Treatment Superintendent
City Conned Allen loins, Dhyor, Nissan H Burke, Msyor ProTempore, NonheasrWard, Denise D Adams, North Ward, Dan Besse South— Ward, Robert C. Clark, War Ward,
John C Larsen, South \hard, Jeff hlaclntosb, Northwest Wird, Dery to I Mc nigmnery East Wird, Junes Tay for Jr, Southeast Win], Cit) Mamger Lee D Garrity
Forsyth County Commw,o rs Dazed R. Plykr, Chatrmin, Don Marun, V,—Ch.,,, Flemmg EI -Anon, Ted Kaplan, Richard V Lnvdlr, Gloria D %Xqusenlumt, Everette %dimpoon,
Count) Manager Dudlc] Whirs, Jr
City/County Utility Corintr s ion Randall S Rude, C.hasrtn in Wesley Curus Jr Vire-Chu, H cold h D,). I.. Gnflm Duan. Lang, Paul S iMcC.ilh Chris 11uker
has Ridrm, Donald R. Stavvt

Winston-Salem Forsyth County Utilities
Wastewater Collection and Treatment System
Performance Report for FY2016-2017
This report is published in accordance with the requirements of the North
Carolina Clean Water Act of 1999 and provides information on the Publicly
Operated Treatment Works (POTW) and Collection System operated by
Winston-Salem/Forsyth County Utilities. It covers the period ffom July 1, 2016
through June 30, 2017. This report is published and released to our customers
annually.
Winston-Salem/Forsyth County Utilities (Utilities) operates two wastewater treatment plants
(WWTPs) with a combined treatment capacity of 51 million gallons per day. The wastewater
collection system includes approximately 1,750 miles of sewer lines, 50 pumping stations, and one
chemical odor control station. During the period covered by this report a total of 11.708 billion
gallons of wastewater was collected and treated at these facilities. Utilities staff work hard to meet
or exceed the requirements mandated by the North Carolina Clean Water Act and the requirements
of the National Pollutant Discharge Elimination System (NPDES) permits that regulate the actual
operation of the treatment plants, the disposal of our biosolids, and the operation and maintenance
of our collection system.
The wastewater collection system operates under NPDES permit WQCS00003. The Archie
Elledge WWTP operates under NPDES Permit NC0037834 and the Muddy Creek WWTP
operates under NPDES permit NC0050342. The treatment and disposal of residual biosolids
produced by the plants is accomplished by anaerobic digestion followed by processing in a
biosolids drying facility at the Elledge WWTP under Permit WQ0029804. The biosolids dryer
facility produced 6,729 dry tons of pelletized biosolids during FY2016-2017, which were
beneficially applied to farmland. The water system has three additional NPDES permits, one
associated with each water treatment plant. The Swann WTP operates under General Permit
NCG590003, the Thomas WTP under NPDES Permit NC0079821 and the Neilson Plant under
permit NC0086011. All three of water plant permits operated within compliance of their permit
conditions during this performance period. The treatment process at the water treatment plants
generates a Class -A Residual that is land applied under Permit WQ0031314. During this
compliance period a total of 387.86 dry tons of residuals were applied on farm land (104.86 dry
tons from the Neilson WTP and 283 dry tons from the Thomas WTP).
The Archie Elledge WWTP, Muddy Creek WWTP and the biosolids dryer facility reported no
violations of their permit limits during the reporting period as shown in Appendix A. The two
wastewater treatment plants met the minimum requirements imposed by the State of North
Carolina's Division of Water Resources by a safety factor of 4.51. The bar chart in Appendix B
shows the performance of the wastewater treatment plants during this period.

Approximately 24,192 tons of regulated pollutants were removed by the treatment processes
during the period ending June 30, 2017.
The remainder of this document includes details about monitoring system discharges and
overflows from our system, the preventative maintenance program established prevents potential
problems and the degree to which we complied with State and Federal standards during the fiscal
year ending June 30, 2017. Utilities' goal is to have zero sanitary sewer overflows (SSO) from the
sewer collection system. However, during the last fiscal year, 62 events totaling 0.0013% of the
wastewater collected was spilled/overflowed from the sanitary sewer system. Appendix A and D
of this report lists a detailed summary of plant and collection system overflows reported in
FY2016-2017.
Since the passage of the North Carolina Clean Water Act in 1999 the total annual SSOs have been
tracked against the baseline year of FYI 998-99 (Appendix Q. The FY2016-2017 total volume of
SSOs represents a 90% decrease from the total reported for the baseline year. Diligence by
maintenance personnel toward preventative maintenance continued to be a major factor
contributing to SSOs remaining at a lower level than that of the baseline year. In fact, FY2016-
2017 has resulted in one of the lowest reported SSO years (62) since reporting began in 1999. Our
success in reducing SSOs also includes the incorporative use of Geographic Information Systems
(GIS) in our maintenance planning. The GIS application houses historical work order information
which allows our crews to respond to areas where issues have repeatedly occurred. Management
also use this same data to help develop future capital projects to alleviate the cause of repeat issues.
In 2016, staff were recertified through the National Association of Sewer Service Companies
(NASSCO) Pipeline Assessment Certification Program. With the certifications we will be able to
continue our advancement in condition assessment for maintenance rehabilitation and replacement
of our aging infrastructure.
Utilities is in the midst of developing a Collection System Improvement Project, which will help
us prioritize and schedule our collection system preventative maintenance measures based on
physical inspections from the field Inspections ranging from routine cleaning to closed circuit
television (CCTV) will be tracked in the City of Winston-Salem's newly implemented
computerized maintenance management system; Cityworks. In an effort to collect more uniform
data and to make crews more efficient, we have also upgraded both of our CCTV camera systems
to Granite Net which cooperates with Cityworks. Essentially all of the information that we collect
from the field will seamlessly be entered into our preventative maintenance scheduler tool
(COTools) and a decision making process can be streamlined for cleaning, rehabilitation and/or
replacement of our collection system infrastructure. By having these new systems in place, we are
helping our field personnel literally bring information right to the supervisor with a few key
strokes. This information will also help CityLink convey any issues to the customer in a very
timely manner.
The major causes of SSO occurrences in FY2016-2017 were attributed to root intrusion, grease
deposits, and debris accumulation. Because of this, additional funding was approved in FY2017
to provide for more preventative cleaning of the collection system. Preventative cleaning of our
collection system will reduce the occurrences of SSOs by preemptively targeting areas prone to
the three major causes of SSOs. In FY2016-2017, Utilities cleaned over 272 miles of the 1,718

mile gravity sanitary sewer collection system. Of the 272 miles that were cleaned, 65% or
approximately 177 miles were proactively cleaned by in-house and contracted crews. For
FY2017-2018 the goal is to increase the portion of proactive cleaning and exceed our overall goal
by cleaning 20% of the entire gravity collection system.
In 2003 a Grease Interceptor Ordinance was adopted which regulates the operation and
maintenance of residential, commercial and industrial grease trap interceptors. This ordinance
alone has been effective in reducing the amount of grease related SSOs since its adoption. In 2003,
the total number of SSOs spiked at 269; the following year that number dropped by nearly 30 SSOs
and the count of SSOs has made a steady decline since that time. While this ordinance has been
effective, further assistance from the public is necessary to completely solve this problem. Over
the past year, in-house personnel have reached out to the public via community events and other
media opportunities in an effort to educate the public on the proper disposal of cooking grease,
fats and other oils. In addition, maintenance personnel have been proactive by cleaning the publicly
maintained portion of sewer connections and keeping sewer main lines clean and free of grease as
well as tree roots and debris. This year, in-house personnel have cleaned 975,153 linear feet of
publicly owned/maintained sewer lines and $495,427 was spent on contracted mainline cleaning
which provided for cleaning of approximately 483,726 linear feet of sewer lines, with an increasing
focus on our large diameter sewer mains. Also, chemical root control contract is anticipated to
treat approximately 202,000 linear feet of sewer main in the upcoming fiscal year.
During FY2016-2017, Utilities continued its proactive efforts toward the reduction of SSOs by
spending over $28 million on the rehabilitation of 88,884 feet of gravity sewer mains, 447
manholes, and 1,276 service laterals. The sewer mains rehabilitated primarily ranged in size from
6" to 54". The mains were rehabilitated by means of pipe bursting, cured -in-place lining of pipes,
total replacements, or a combination of any of these methods. The enhanced condition of these
sewer mains and manholes provided by the rehabilitation projects not only contributed to the
reduction of SSOs but also aided in the reduction of infiltration and inflow by reducing and/or
eliminating sewer system access points for storm water runoff and groundwater. In addition,
Utilities performed closed circuit TV inspection of 773,506 feet of sewer mains. Staff and
contractors also improved the access to collection system through the inspection and
mowing/clearing of approximately 15.98 miles of easements.
Further, staff continued to actively identify and plan for projects in an effort to reduce SSOs and
infiltration and inflow into the sewer system In addition to the benefits of reducing SSO volume
and the reduction of water getting into the system, these projects have the added benefit of
decreasing the amount of sewer to be treated thereby reducing overall operating costs.
As always, customer involvement will continue to be a factor in the reduction of SSOs. All
customers can do their part in helping to keep the sewer system free of materials that cause
blockages by not dumping debris and fats, oils, or grease into the system.

To report a sewer spill, please contact the City of Winston-Salem 24—hour customer service line
(CityLink) at [phone]. For questions regarding our programs or additional information
regarding this report, please contact Courtney L. Driver, P E. Utilities Director at [phone]
Copies of this report may be obtained by calling CityLink at [phone] and requesting a
copy. This report is also available at all branches of the Forsyth County Public Library and it is
posted on the Utilities Division's website at hyp //www cityofws oY Iddepartments/zctilities/stats-
reports
Certification of Accuracy:
I certify under penalty of law that this report is complete and accurate to the best of my knowledge.
I further certify that this report has been made available to all persons or concerns using the
publicly owned wastewater collection and treatment facilities under the direction of Winston-
Salem/Forsyth County Utilities and that those persons or concerns have been notified as to the
availability of this resort.
Date 0 . ,ok5 . I,
Courtney L. Dr e n. Utilities Director
Winston -Sale o County Utilities

Appendix A: Wastewater Treatment Plant and Pump Station Overflow/Spill Information
Fiscal Year 2016-2017
Month/Year
Flow Discharged From
Treatment Plants, Gallons
Number of
Overflow Events
Reported
Volume of
Overflows,
gallons
Number of
NPDES Permit
Violations at
Treatment Plants
July 2016
975,260,000
0
0
0
August 2016
998,510,000
0
0
0
Sept 2016
876,000,000
1
400
0
October 2016
941,470,000
0
0
0
November 2016
851,400,000
0
0
0
December 2016
908,300,000
0
0
0
January 2017
1,054,000,000
1
532
0
February 2017
838,600,000
0
0
0
March 2017
902,700,000
0
0
0
April 2017
1,172,700,000
2
1142
0
May 2017
1,192,260,000
1
648
0
June 2017
996,500,000
0
0
0
ANNUAL TOTAL
11,707,700,000
5
2722
0
Notes:
No NPDES permit violations at either wastewater treatment plant.
9/8/2016 AEWWTP spilled 400 gallons of treated effluent water (NPW) into Salem Creek due to a
ruptured NP W line.
1/23/2017 Muddy Creek WWTP had an overflow of 532 gallons of influent wastewater from the
temporary pumping system at South Fork diversion box due to an extreme rainfall event.
4/20/17 AEWWTP spilled 360 gallons of wastewater into Salem Creek due to a Wastage Vault
Overflow.
4/25/2017 MCWWTP had an overflow of 782 gallons of influent wastewater from the temporary
pumping system at South Fork diversion box due to an extreme rainfall event.
5/23/2017 MCWWTP had an overflow of 648 gallons of influent wastewater from the temporary
pumping system at South Fork diversion box due to an extreme rainfall event.

Appendix B
35000
30000
25000
20000
Tons 15000
10000
5000
Wastewater Treatment Efficiency During FY2016-17
a Tons Regulated Pollutants Received at Treatment Plants
CI Tons Regulated Pollutants Allowed in Discharge by Division of Water Quality
oTons Regulated Pollutants Actually Discharged by Treatment Plants

Appendix C Fiscal Year 2016-2017 Performance Summary of Sewer Collection System
Month/Year
Total No of
SSO's
Notice of
Violations
SSO w/> 1000
gal in Surface
waters*
SSO w/> 15,000
gal in Surface
waters
Total SSO
Volume (gal)
Total Sewer
Collected— (gal)
SSO Percentage
of Total
July -16
4
0
0
0
1,513
975,260,000
00002%
August -16
7
0
0
0
2,460
998,510,000
00002%
September -16
2
1
1
0
3,863
876,000,000
00004%
October -16
8
0
0
0
2,963
941,470,000
00003%
Noxember-16
6
0
0
0
1,223
851,400,000
00001%
December -16
6
0
0
0
1,263
908,300,000
00001%
January -17
3
0
0
0
500
1,054,000,000
00000%
February -17
8
1
0
0
4,250
838,600,000
00005%
March -17
4
0
0
0
388
902,700,000
00000%
Apnl-17
5
1
1
0
13,323
1,172,700,000
00011%
May -17
7
0
0
0
3,112
1,192,260,000
0 0003%
June -171
2
0
0
0
916
996,500,000
00001%
2016-2017 Annual
TOTAL
62
3
2
0
35,774
11,707,700,000
00035%
2015-2016 Annual
TOTAL
73
21
12
1
157,949
12,083,570,000
00013%
2014-2015 Annual
TOTAL
86
491
12
1
127,405
10,753,560,000
00012%
2013-2014 Annual
TOTAL
82
30
15
0
106,384
11,840,630,000
00009%
2012-2013 Annual
TOTAL
111
38
13
2
144,549
11,331,870,000
00013%
2011-2012 Annual
TOTAL
117
61
10
0
65,273
11,289,980,000
00006%
2010-2011 Annual
TOTAL
109
76
15
0
95,342
11,328,410,000
00008%
2009-2010 Annual
TOTAL
106
77
16
3
1,840,134
12,291,330,000
00150%
2008-2009 Annual
TOTAL
117
88
0
85,433
11,607,400,000
00007%
2007-2008 Annual
]20
TOTAL
129
N/A
1
142,412
11,473,040,000
00012%
2006-2007 Annual
TOTAL
161
N/A
40
8
571,946
12,475,820,000
00046%
2005-2006 Annual
TOTAL
159
N/A
46
3
317,585
12,182,250,000
00026%
2004-2005 Annual
TOTAL
211
N/A
49
3
246,290
12,621,450,000
00020%
2003-2004 Annual
TOTAL
241
N/A
69
2
322,050
12,822,200,000
00025%
2002-2003 Annual
TOTAL
269
N/A
116
16
2,305,175
13,408,980,000
00172%
2001-2002 Annual
TOTAL
228
N/A
70
1
338,806
11,467,900,000
00030%
2000-2001 Annual
TOTAL
193
N/A
84
4
533,108
11,930,700,000
00045%
1999-2000 Annual
TOTAL
189
N/A
119
9
1,154,350
12,289,000,000
00094%
1998-1999 Annual
TOTAL
194
N/A
118
211
1,541,0541
11,804,100,000
0 0131%

SSO Occurrences attributable to:
FY2016-2017
Percentage
Quantity Total
Grease
11
177%
4,950
Roots
25
403%
11,183
Debris
13
210%
2,525
Inflow & Infiltration
0
00%
0
Vandalism
1
16%
850
Pipe Failure
10
161%
15,316
Pump Station Equipment Failure
0
00%
0
Severe Natural Conditions
0
00%
0
Other
2
32% 1
950
TOTAL
62
1000% 1
35,774
*See Appendix D (attached) for a complete listing of locations, SSO (Sanitary Sewer Overflow) Totals and SSO
"Volume in Surface Water" for all spills during this fiscal year
"This is the total volume of treated waste discharged from the plant but is assumed to be equal to what is collected

Appendix D:
Month/Year
JULY 2016
Probable Cause of SSO
Total SSO
Volume
(ga1.)
SSO
Volume in
Surface
waters
Location of SSO
7/1/2016
ROOTS
825
825
137 ROSEDALE CIR
7/20/2016
PIPE FAILURE
50
50
4678 PATTERSON AVE
7/22/2016
GREASE
113
113
349 CARVER POINTE
7/29/2016
PIPE FAILURE
525
525
300 CASSELL ST
Total for July
AUGUST 2016
4
1,513
1 1,513
8/1/2016
DEBRIS
500
400
1328 Diggs
8/3/2016
DEBRIS
75
38
2623 STOCKTON
8/6/2016
ROOTS
300
225
1604 TRINITY GARDEN CIR
8/7/2016
DEBRIS
450
450
2298 AUTUMN MIST DR
8/13/2016
ROOTS
450
225
1070 E KENT RD
8/17/2016
ROOTS
10
10
3637 YALE AVE
8/23/2016
ROOTS
675
608
1046 MOTOR RD
Total for August
SEPTEMBER 2016
7
2,460
1,956
9/2/2016
ROOTS
600
300
1834 WAKE FOREST RD
9/21/2016
ROOTS
3,263
3,263
SALEM & ACADEMY ST
Total for September
OCTOBER 2016
2
3,863
3,563
10/06/2016
DEBRIS
250
250
2676 GOLDEN OAKS DR
10/10/20106
DEBRIS
225
225
199 WYNBROOK CT
10/12/2016
ROOTS
113
113
518 SHERWOOD HILLS DR
10/17/2016
DEBRIS
100
100
1325 IVY AVE
10/17/2016
DEBRIS
225
169
7641 ROLLING OAK CT
1 0/1 71201 6
GREASE
1,800
100
100 WESTMEADOW DR
10/24/2016
DEBRIS
100
100
231 HARPER ST
10/25/2016
OTHER
150
150
2805 INDIANA AVE
Total for October
NOVEMBER 2016
8
2,963
1,207
11/4/2016
DEBRIS
50
50
339 DIXIE BROADWAY
11/8/2016
ROOTS
38
38
4117 CHATHAM HILL DR
11/9/2016
ROOTS
1,050
50
0 MCGREGOR PARK
11/11/2016
ROOTS
5
5
3545 CEDAR POST RD
11/22/2016
ROOTS
30
15
210 W DAVIDSON AVE
11/2/2016
GREASE
50
50
2795 PETERS CREEK PKWY
Total for November
DECEMBER 2016
6
1,223
208
12/2/2016
Debris
225
225
1418 GLADE ST
12/10/2016
Debris
125
125
801 GRAY AVE
12/21/2016
PIPE FAILURE
50
50
912 HUTTON ST
12/22/2016
ROOTS
113
113
1200 WILMAR PLACE CT
12/25/2016
ROOTS
600
600
O MOCK ST
12/26/2016
GREASE
150
10
4744 BAUX MOUNTAIN RD
Total for December
6
1,263
1,123

JANUARY 2017
1/14/2017
PIPE FAILURE
100
100
875 WEST NORTHWEST BLVD
1/16/2017
GREASE
300
100
1533 JUBILLE TRAIL
1/25/2017
DEBRIS
100
100
1406 DIGGS
Total for January
FEBRUARY 2017
3
500
300
2/1/2017
ROOTS
50
50
702 WEST MOUNTAIN ST
2/2/2017
PIPE FAILURE
200
200
718 ASHVIEW DR
2/7/2017
VANDALISM
850
400
2367 BETHABARA RD
2/8/2017
ROOTS
600
50
2500 REYNOLDS PARK RD
2/8/2017
ROOTS
50
25
127 DAVIE AVE
2/14/2017
OTHER
800
800
718 ASHVIEW DR
2/17/2017
ROOTS
200
100
3500 SALLYKIRK RD
2/18/2017
ROOTS
1,500
200
104 EDGEDALE CT
Total for February
MARCH 2017
8
4,250
1,825
3/9/2017
ROOTS
25.00
25.00
437 GOLDFLOSS ST
3/13/2017
GREASE
100.00
100.00
2355 PLEASANT ST
3/17/2017
ROOTS
113.00
113.00
339 PICCADILLY DR
3/31/2017
GREASE
150.00
150.00
65 HOSKINS DR
Total for March
APRIL 2017
4
388
388
4/2/2017
GREASE
600
200
455 QUAIL HAVEN LN
4/11/2017
ROOTS
10
10
2315 MARY DEE LN
4/15/2017
ROOTS
225
225
125 LIVINGSTON CT
4/26/2017
PIPE FAILURE
12,375
12,375
1031 EAST MOUNTAIN ST
4/27/2017
ROOTS
1 113
113
1 1060 RANCH DR
Total for April
MAY 2017
5
13,323
12,923
5/2/2017
GREASE
150
150
469 VILLA DR
5/2/2017
DEBRIS
100
100
PARKWAY & MAGNOLIA
5/5/2017
ROOTS
225
225
3120 ORMOND DR
5/17/17
PIPE FAILURE
50
50
1151 CANAL DR
5/17/2017
PIPE FAILURE
500
500
2420 CHEROKEE LN
5/26/2017
GREASE
1,187
593
5277 N CHERRY ST
5/31/2017
PIPE FAILURE
900
900
2321 CHEROKEE LN
Total for May
JUNE 2017
6/5/2017
7 -
GREASE
3,112
350
2,518
350
364 S CHERRY ST
6/17/2017
PIPE FAILURE
566
566
0 ROMARA DR
Total for June
2
916
916
Total for 2016-2017
62
35,774
28,440

RECEIVEDIMCDEWWR
Winston-Salem Forsyth County Utilities SEP 01 2017
Wastewater Collection and Treatment S stem Water Quality
y Permitting Section
Performance Report for FY2016-2017
This report is published in accordance with the requirements of the North
Carolina Clean Water Act of 1999 and provides information on the Publicly
Operated Treatment Works (POTW) and Collection System operated by
Winston-Salem/Forsyth County Utilities. It covers the period from July 1, 2016
through June 30, 2017. This report is published and released to our customers
annually.
Winston-Salem/Forsyth County Utilities (Utilities) operates two wastewater treatment plants
(WWTPs) with a combined treatment capacity of 51 million gallons per day. The wastewater
collection system includes approximately 1,750 miles of sewer lines, 50 pumping stations, and one
chemical odor control station. During the period covered by this report a total of 11.708 billion
gallons of wastewater was collected and treated at these facilities. Utilities staff work hard to meet
or exceed the requirements mandated by the North Carolina Clean Water Act and the requirements
of the National Pollutant Discharge Elimination System (NPDES) permits that regulate the actual
operation of the treatment plants, the disposal of our biosolids, and the operation and maintenance
of our collection system
The wastewater collection system operates under NPDES permit WQCS00003. The Archie
Elledge WWTP operates under NPDES Permit NC0037834 and the Muddy Creek WWTP
operates under NPDES permit NC0050342 The treatment and disposal of residual biosolids
produced by the plants is accomplished by anaerobic digestion followed by processing in a
biosolids drying facility at the Elledge WWTP under Permit WQ0029804. The biosolids dryer
facility produced 6,729 dry tons of pelletized biosolids during FY2016-2017, which were
beneficially applied to farmland The water system has three additional NPDES permits, one
associated with each water treatment plant The Swann WTP operates under General Permit
NCG590003, the Thomas WTP under NPDES Permit NC0079821 and the Neilson Plant under
permit NC0086011. All three of water plant permits operated within compliance of their permit
conditions during this performance period The treatment process at the water treatment plants
generates a Class -A Residual that is land applied under Permit WQ0031314. During this
compliance period a total of 387.86 dry tons of residuals were applied on farm land (104.86 dry
tons from the Neilson WTP and 283 dry tons from the Thomas WTP).
The Archie Elledge WWTP, Muddy Creek WWTP and the biosolids dryer facility reported no
violations of their permit limits during the reporting period as shown in Appendix A. The two
wastewater treatment plants met the minimum requirements imposed by the State of North
Carolina's Division of Water Resources by a safety factor of 4.51. The bar chart in Appendix B
shows the performance of the wastewater treatment plants during this period.

Approximately 24,192 tons of regulated pollutants were removed by the treatment processes
during the period ending June 30, 2017.
The remainder of this document includes details about monitoring system discharges and
overflows from our system, the preventative maintenance program established prevents potential
problems and the degree to which we complied with State and Federal standards during the fiscal
year ending June 30, 2017. Utilities' goal is to have zero sanitary sewer overflows (SSO) from the
sewer collection system. However, during the last fiscal year, 62 events totaling 0.0013% of the
wastewater collected was spilled/overflowed from the sanitary sewer system. Appendix A and D
of this report lists a detailed summary of plant and collection system overflows reported in
FY2016-2017.
Since the passage of the North Carolina Clean Water Act in 1999 the total annual SSOs have been
tracked against the baseline year of FY1998-99 (Appendix Q. The FY2016-2017 total volume of
SSOs represents a 90% decrease from the total reported for the baseline year. Diligence by
maintenance personnel toward preventative maintenance continued to be a major factor
contributing to SSOs remaining at a lower level than that of the baseline year. In fact, FY2016-
2017 has resulted in one of the lowest reported SSO years (62) since reporting began in 1999 Our
success in reducing SSOs also includes the incorporative use of Geographic Information Systems
(GIS) in our maintenance planning. The GIS application houses historical work order information
which allows our crews to respond to areas where issues have repeatedly occurred. Management
also use this same data to help develop future capital projects to alleviate the cause of repeat issues.
In 2016, staff were recertified through the National Association of Sewer Service Companies
(NASSCO) Pipeline Assessment Certification Program. With the certifications we will be able to
continue our advancement in condition assessment for maintenance rehabilitation and replacement
of our aging infrastructure.
Utilities is in the midst of developing a Collection System Improvement Project, which will help
us prioritize and schedule our collection system preventative maintenance measures based on
physical inspections from the field. Inspections ranging from routine cleaning to closed circuit
television (CCTV) will be tracked in the City of Winston-Salem's newly implemented
computerized maintenance management system; Cityworks. In an effort to collect more uniform
data and to make crews more efficient, we have also upgraded both of our CCTV camera systems
to Granite Net which cooperates with Cityworks. Essentially all of the information that we collect
from the field will seamlessly be entered into our preventative maintenance scheduler tool
(COTools) and a decision making process can be streamlined for cleaning, rehabilitation and/or
replacement of our collection system infrastructure. By having these new systems in place, we are
helping our field personnel literally bring information right to the supervisor with a few key
strokes This information will also help CityLink convey any issues to the customer in a very
timely manner.
The major causes of SSO occurrences in FY2016-2017 were attributed to root intrusion, grease
deposits, and debris accumulation. Because of this, additional funding was approved in FY2017
to provide for more preventative cleaning of the collection system. Preventative cleaning of our
collection system will reduce the occurrences of SSOs by preemptively targeting areas prone to
the three major causes of SSOs. In FY2016-2017, Utilities cleaned over 272 miles of the 1,718

mile gravity sanitary sewer collection system. Of the 272 miles that were cleaned, 65% or
approximately 177 miles were proactively cleaned by in-house and contracted crews. For
FY2017-2018 the goal is to increase the portion of proactive cleaning and exceed our overall goal
by cleaning 20% of the entire gravity collection system.
In 2003 a Grease Interceptor Ordinance was adopted which regulates the operation and
maintenance of residential, commercial and industrial grease trap interceptors. This ordinance
alone has been effective in reducing the amount of grease related SSOs since its adoption. In 2003,
the total number of SSOs spiked at 269; the following year that number dropped by nearly 30 SSOs
and the count of SSOs has made a steady decline since that time. While this ordinance has been
effective, further assistance from the public is necessary to completely solve this problem. Over
the past year, in-house personnel have reached out to the public via community events and other
media opportunities in an effort to educate the public on the proper disposal of cooking grease,
fats and other oils. In addition, maintenance personnel have been proactive by cleaning the publicly
maintained portion of sewer connections and keeping sewer main lines clean and free of grease as
well as tree roots and debris. This year, in-house personnel have cleaned 975,153 linear feet of
publicly owned/maintained sewer lines and $495,427 was spent on contracted mainline cleaning
which provided for cleaning of approximately 483,726 linear feet of sewer lines, with an increasing
focus on our large diameter sewer mains Also, chemical root control contract is anticipated to
treat approximately 202,000 linear feet of sewer main in the upcoming fiscal year.
During FY2016-2017, Utilities continued its proactive efforts toward the reduction of SSOs by
spending over $28 million on the rehabilitation of 88,884 feet of gravity sewer mains, 447
manholes, and 1,276 service laterals. The sewer mains rehabilitated primarily ranged in size from
6" to 54". The mains were rehabilitated by means of pipe bursting, cured -in-place lining of pipes,
total replacements, or a combination of any of these methods The enhanced condition of these
sewer mains and manholes provided by the rehabilitation projects not only contributed to the
reduction of SSOs but also aided in the reduction of infiltration and inflow by reducing and/or
eliminating sewer system access points for storm water runoff and groundwater. In addition,
Utilities performed closed circuit TV inspection of 773,506 feet of sewer mains. Staff and
contractors also improved the access to collection system through the inspection and
mowing/clearing of approximately 15.98 miles of easements
Further, staff continued to actively identify and plan for projects in an effort to reduce SSOs and
infiltration and inflow into the sewer system. In addition to the benefits of reducing SSO volume
and the reduction of water getting into the system, these projects have the added benefit of
decreasing the amount of sewer to be treated thereby reducing overall operating costs.
As always, customer involvement will continue to be a factor in the reduction of SSOs. All
customers can do their part in helping to keep the sewer system free of materials that cause
blockages by not dumping debris and fats, oils, or grease into the system.

To report a sewer spill, please contact the City of Winston-Salem 24—hour customer service line
(CityLink) at [phone]. For questions regarding our programs or additional information
regarding this report, please contact Courtney L. Driver, P.E. Utilities Director at [phone].
Copies of this report may be obtained by calling CityLink at [phone] and requesting a
copy. This report is also available at all branches of the Forsyth County Public Library and it is
posted on the Utilities Division's website at http //www cityo&s orgldepaYtments/utilities/stats-
reports
Certification of Accuracy:
I certify under penalty of law that this report is complete and accurate to the best of my knowledge.
I further certify that this report has been made available to all persons or concerns using the
publicly owned wastewater collection and treatment facilities under the direction of Winston-
Salem/Forsyth County Utilities and that those persons or concerns have been notified as to the
availability of this retort.
Date 16''Oks' 11
Courtney L. Dr ei Utilities Director
Winston -Sale o County Utilities

Appendix A: Wastewater Treatment Plant and Pump Station Overflow/Spill Information
Fiscal Year 2016-2017
Month/Year
Flow Discharged From
Treatment Plants, Gallons
Number of
Overflow Events
Reported
Volume of
Overflows,
gallons
Number of
NPDES Permit
Violations at
Treatment Plants
July 2016
975,260,000
0
0
0
August 2016
998,510,000
0
0
0
Sept 2016
876,000,000
1
400
0
October 2016
941,470,000
0
0
0
November 2016
851,400,000
0
0
0
December 2016
908,300,000
0
0
0
January 2017
1,054,000,000
1
532
0
February 2017
838,600,000
0
0
0
March 2017
902,700,000
0
0
0
April 2017
1,172,700,000
2
1142
0
May 2017
1,192,260,000
1
648
0
June 2017
996,500,000
0
0
0
ANNUAL TOTAL
11,707,700,000
5
2722
0
Notes:
No NPDES permit violations at either wastewater treatment plant.
9/8/2016 AEWWTP spilled 400 gallons of treated effluent water (NPW) into Salem Creek due to a
ruptured NPW line.
1/23/2017 Muddy Creek WWTP had an overflow of 532 gallons of influent wastewater from the
temporary pumping system at South Fork diversion box due to an extreme rainfall event.
4/20/17 AEWWTP spilled 360 gallons of wastewater into Salem Creek due to a Wastage Vault
Overflow.
4/25/2017 MCWWTP had an overflow of 782 gallons of influent wastewater from the temporary
pumping system at South Fork diversion box due to an extreme rainfall event.
5/23/2017 MCWWTP had an overflow of 648 gallons of influent wastewater from the temporary
pumping system at South Fork diversion box due to an extreme rainfall event

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Appendix C. Fiscal Year 2016-2017 Performance Summary of Sewer Collection System
Month/Year
Total No of
SSO's
Notice of
Violations
SSO w/> 1000
gal, in Surface
waters"
SSo w/> 15,000
gal in Surface
waters
Total SSO
Volume (gal)
Total Sewer
Collected" (gal)
SSO Percentage
of Total
July -16
4
0
0
0
1,513
975,260,000
00002%
August -16
7
0
0
0
2,460
998,510,000
00002%
September -16
2
1
1
0
3,863
876,000,000
00004%
October -16
8
0
0
0
2,963
941,470,000
00003%
November -16
6
0
0
0
1,223
851,400,000
00001%
December -16
6
0
0
0
1,263
908,300,000
00001%
January -17
3
0
0
0
500
1,054,000,000
00000%
February -17
8
1
0
0
4,250
838,600,000
00005%
March -17
4
0
0
0
388
902,700,000
00000 0
April -17
5
1
1
0
13,323
1,172,700,000
00011%
May -17
7
0
0
0
3,112
1,192,260,000
00003%
June -17
2
0
0
0
916
996,500,000
00001%
2016-2017 Annual
2
0
35,774
11,707,700,000
00035%
TOTAL
62
3
2015-2016 Annual
TOTAL
73
21
12
1
157,949
12,083,570,000
00013%
2014-2015 Annual
12
1
127,405
10,753,560,000
00012%
TOTAL
86
49
2013-2014 Annual
15
0
106,384
11,840,630,000
0 0009%
TOTAL
82
30
2012-2013 Annual
13
2
144,549
11,331,870,000
00013%
TOTAL
111
38
2011-2012 Annual
10
0
65,273
11,289,980,000
00006%
TOTAL
117
61
2010-2011 Annual
15
0
95,342
11,328,410,000
0 0008%
TOTAL
109
76
2009-2010 Annual
TOTAL
106
77
16
3
1,840,134
12,291,330,000
00150%
2008-2009 Annual
20
0
85,433
11,607,400,000
00007%
TOTAL
117
88
2007-2008 Annual
TOTAL
129
N/A
31
1
142,412
11,473,040,000
00012%
2006-2007 Annual
TOTAL
161
N/A
40
8
571,946
12,475,820,000
00046%
2005-2006 Annual
TOTAL
159
N/A
46
3
317,585
12,182,250,000
00026%
2004-2005 Annual
TOTAL
211
N/A
49
3
246,290
12,621,450,000
00020%
2003-2004 Annual
TOTAL
241
N/A
69
2
322,050
12,822,200,000
00025%
2002-2003 Annual
TOTAL
269
N/A
116
16
2,305,175
13,408,980,000
0 0172%
2001-2002 Annual
TOTAL
228
N/A
70
1
338,806
11,467,900,000
00030%
2000-2001 Annual
TOTAL
193
N/A
84
4
533,108
11,930,700,000
00045%
1999-2000 Annual
119
9
1,154,350
12,289,000,000
00094%
TOTAL
189
N/A
1998-1999 Annual
TOTAL
1 194
N/A
118
21
1,541,054
11,804,100,000
00131%1

SSO Occurrences attributable to:
FY2016-2017
Percentage
Quantity Total
Grease
11
177%
4,950
Roots
25
403%
11,183
Debris
13
210%
2,525
Inflow & Infiltration
0
00%
0
Vandalism
1
16%
850
Pipe Failure
10
161%
15,316
Pump Station Equipment Failure
0
00%
0
Severe Natural Conditions
0
00%
0
Other
2
32%
1 950
TOTAL
62
1000%
1 35,774
*See Appendix D (attached) for a complete listing of locations, SSO (Sanitary Sewer Overflow) Totals and SSO
"Volume in Surface Water" for all spills during this fiscal year.
**This is the total volume of treated waste discharged from the plant but is assumed to be equal to what is collected

A n
Month/Year
JULY 2016
7/1/2016
Probable Cause of SSO
ROOTS
Total SSO
Volume
(gal.)
825
SSO
Volume in
Surface
waters
825
Location of SSO
137 ROSEDALE CIR
7/20/2016
PIPE FAILURE
50
50
4678 PATTERSON AVE
7/22/2016
GREASE
113
113
349 CARVER POINTE
7/29/2016
PIPE FAILURE
525
525
300 CASSELL ST
Total for July
AUGUST 2016
8/1/2016
4
DEBRIS
1,513
500
1,513
400
1328 Diggs
8/3/2016
DEBRIS
75
38
2623 STOCKTON
8/6/2016
ROOTS
300
225
1604 TRINITY GARDEN CIR
8/7/2016
DEBRIS
450
450
2298 AUTUMN MIST DR
8/13/2016
ROOTS
450
225
1070 E KENT RD
8/17/2016
ROOTS
10
10
3637 YALE AVE
8/23/2016
ROOTS
675
608
1046 MOTOR RD
Total for August
SEPTEMBER 2016
9/2/2016
7
ROOTS
2,460
600
1 1,956
300
1834 WAKE FOREST RD
9/21/2016
ROOTS
3,263
3,263
SALEM & ACADEMY ST
Total for September
OCTOBER 2016
10/06/2016
2
DEBRIS
3,863
250
3,563
250
2676 GOLDEN OAKS DR
10/10/20106
DEBRIS
225
225
199 WYNBROOK CT
10/12/2016
ROOTS
113
113
518 SHERWOOD HILLS DR
10/17/2016
DEBRIS
100
100
1325 IVY AVE
10/17/2016
DEBRIS
225
169
7641 ROLLING OAK CT
1 0/1 71201 6
GREASE
1,800
100
100 WESTMEADOW DR
10/24/2016
DEBRIS
100
100
231 HARPER ST
10/25/2016
OTHER
150
150
2805 INDIANA AVE
Total for October
8
2,963
1,207
NOVEMBER 2016
11/4/2016
DEBRIS
50
50
339 DIXIE BROADWAY
11/8/2016
ROOTS
38
38
4117 CHATHAM HILL DR
11/9/2016
ROOTS
1,050
50
0 MCGREGOR PARK
11/11/2016
ROOTS
5
5
3545 CEDAR POST RD
11/22/2016
ROOTS
30
15
210 W DAVIDSON AVE
1112/2016
GREASE
50
50
2795 PETERS CREEK PKWY
Total for November
6
1,223
1 208
DECEMBER 2016
121212016
Debris
225
225
1418 GLADE ST
1 211 0/201 6
Debris
125
125
801 GRAY AVE
12/21/2016
PIPE FAILURE
50
50
912 HUTTON ST
12/22/2016
ROOTS
113
113
1200 WILMAR PLACE CT
12/25/2016
ROOTS
600
600
O MOCK ST
12/26/2016
GREASE
150
10
4744 BAUX MOUNTAIN RD
Total for December
6
1,263
1,123

JANUARY 2017
1/14/2017
PIPE FAILURE
100
100
875 WEST NORTHWEST BLVD
1/16/2017
GREASE
300
100
1533 JUBILLE TRAIL
1/25/2017
DEBRIS
100
100
1406 DIGGS
Total for January
FEBRUARY 2017
2/1/2017
3
ROOTS
500
50
300
50
702 WEST MOUNTAIN ST
2/2/2017
PIPE FAILURE
200
200
718 ASHVIEW DR
2/7/2017
VANDALISM
850
400
2367 BETHABARA RD
2/8/2017
ROOTS
600
50
2500 REYNOLDS PARK RD
2/8/2017
ROOTS
50
25
127 DAVIE AVE
2/14/2017
OTHER
800
800
718 ASHVIEW DR
2/17/2017
ROOTS
200
100
3500 SALLYKIRK RD
2/18/2017
ROOTS
1,500
200
104 EDGEDALE CT
Total for February 1
MARCH 2017
3/9/2017
8
ROOTS
4,250
25.00
1,825
25.00
437 GOLDFLOSS ST
3/13/2017
GREASE
100.00
100.00
2355 PLEASANT ST
3/17/2017
ROOTS
113.00
11300
339 PICCADILLY DR
3/31/2017
GREASE
15000
150.00
65 HOSKINS DR
Total for March
APRIL 2017
4/2/2017
4
GREASE
388
600
388
200
455 QUAIL HAVEN LN
4/11/2017
ROOTS
10
10
2315 MARY DEE LN
4/15/2017
ROOTS
225
225
125 LIVINGSTON CT
4/26/2017
PIPE FAILURE
12,375
12,375
1031 EAST MOUNTAIN ST
4/27/2017
ROOTS
113
113
1060 RANCH DR
Total for April
MAY 2017
5
13,323
12,923
5/2/2017
GREASE
150
150
469 VILLA DR
5/2/2017
DEBRIS
100
100
PARKWAY & MAGNOLIA
5/5/2017
ROOTS
225
225
3120 ORMOND DR
5/17/17
PIPE FAILURE
50
50
1151 CANAL DR
5/17/2017
PIPE FAILURE
500
500
2420 CHEROKEE LN
5/26/2017
GREASE
1,187
593
5277 N CHERRY ST
5/31/2017
PIPE FAILURE
900
900
2321 CHEROKEE LN
Total for May
JUNE 2017
6/5/2017
7
GREASE
3,112
350
2,518
350
364 S CHERRY ST
6/17/2017
PIPE FAILURE
566
566
0 ROMARA DR
Total for June
2
916
916
Total for 2016-2017
62
35,774
28,440

RECEIVED/NCDEQ/M
SEP 01 2017
Water Quality
Winston-Salem Forsyth County Utilities Permitting Section
Wastewater Collection and Treatment System
Performance Report for FY2016-2017
This report is published in accordance with the requirements of the North
Carolina Clean Water Act of 1999 and provides information on the Publicly
Operated Treatment Works (POTW) and Collection System operated by
Winston-Salem/Forsyth County Utilities. It covers the period from July 1, 2016
through June 30, 2017. This report is published and released to our customers
annually.
Winston-Salem/Forsyth County Utilities (Utilities) operates two wastewater treatment plants
(WWTPs) with a combined treatment capacity of 51 million gallons per day. The wastewater
collection system includes approximately 1,750 miles of sewer lines, 50 pumping stations, and one
chemical odor control station. During the period covered by this report a total of 11 708 billion
gallons of wastewater was collected and treated at these facilities. Utilities staff work hard to meet
or exceed the requirements mandated by the North Carolina Clean Water Act and the requirements
of the National Pollutant Discharge Elimination System (NPDES) permits that regulate the actual
operation of the treatment plants, the disposal of our biosolids, and the operation and maintenance
of our collection system
The wastewater collection system operates under NPDES permit WQCS00003 The Archie
Elledge WWTP operates under NPDES Permit NCO037834 and the Muddy Creek WWTP
operates under NPDES permit NC0050342. The treatment and disposal of residual biosolids
produced by the plants is accomplished by anaerobic digestion followed by processing in a
biosolids drying facility at the Elledge WWTP under Permit WQ0029804. The biosolids dryer
facility produced 6,729 dry tons of pelletized biosolids during FY2016-2017, which were
beneficially applied to farmland. The water system has three additional NPDES permits, one
associated with each water treatment plant. The Swann WTP operates under General Permit
NCG590003, the Thomas WTP under NPDES Permit NCO079821 and the Neilson Plant under
permit NCO086011 All three of water plant permits operated within compliance of their permit
conditions during this performance period. The treatment process at the water treatment plants
generates a Class -A Residual that is land applied under Permit WQ0031314. During this
compliance period a total of 387 86 dry tons of residuals were applied on farm land (104 86 dry
tons from the Neilson WTP and 283 dry tons from the Thomas WTP).
The Archie Elledge WWTP, Muddy Creek WWTP and the biosolids dryer facility reported no
violations of their permit limits during the reporting period as shown in Appendix A. The two
wastewater treatment plants met the minimum requirements imposed by the State of North
Carolina's Division of Water Resources by a safety factor of 4.51. The bar chart in Appendix B
shows the performance of the wastewater treatment plants during this period

Approximately 24,192 tons of regulated pollutants were removed by the treatment processes
during the period ending June 30, 2017.
The remainder of this document includes details about monitoring system discharges and
overflows from our system, the preventative maintenance program established prevents potential
problems and the degree to which we complied with State and Federal standards during the fiscal
year ending June 30, 2017. Utilities' goal is to have zero sanitary sewer overflows (SSO) from the
sewer collection system. However, during the last fiscal year, 62 events totaling 0.0013% of the
wastewater collected was spilled/overflowed from the sanitary sewer system Appendix A and D
of this report lists a detailed summary of plant and collection system overflows reported in
FY2016-2017.
Since the passage of the North Carolina Clean Water Act in 1999 the total annual SSOs have been
tracked against the baseline year of FY1998-99 (Appendix Q. The FY2016-2017 total volume of
SSOs represents a 90% decrease from the total reported for the baseline year Diligence by
maintenance personnel toward preventative maintenance continued to be a major factor
contributing to SSOs remaining at a lower level than that of the baseline year. In fact, FY2016-
2017 has resulted in one of the lowest reported SSO years (62) since reporting began in 1999. Our
success in reducing SSOs also includes the incorporative use of Geographic Information Systems
(GIS) in our maintenance planning. The GIS application houses historical work order information
which allows our crews to respond to areas where issues have repeatedly occurred. Management
also use this same data to help develop future capital projects to alleviate the cause of repeat issues.
In 2016, staff were recertified through the National Association of Sewer Service Companies
(NASSCO) Pipeline Assessment Certification Program With the certifications we will be able to
continue our advancement in condition assessment for maintenance rehabilitation and replacement
of our aging infrastructure.
Utilities is in the midst of developing a Collection System Improvement Project, which will help
us prioritize and schedule our collection system preventative maintenance measures based on
physical inspections from the field. Inspections ranging from routine cleaning to closed circuit
television (CCTV) will be tracked in the City of Winston-Salem's newly implemented
computerized maintenance management system; Cityworks. In an effort to collect more uniform
data and to make crews more efficient, we have also upgraded both of our CCTV camera systems
to Granite Net which cooperates with Cityworks. Essentially all of the information that we collect
from the field will seamlessly be entered into our preventative maintenance scheduler tool
(COTools) and a decision making process can be streamlined for cleaning, rehabilitation and/or
replacement of our collection system infrastructure. By having these new systems in place, we are
helping our field personnel literally bring information right to the supervisor with a few key
strokes. This information will also help CityLink convey any issues to the customer in a very
timely manner.
The mayor causes of SSO occurrences in FY2016-2017 were attributed to root intrusion, grease
deposits, and debris accumulation. Because of this, additional funding was approved in FY2017
to provide for more preventative cleaning of the collection system Preventative cleaning of our
collection system will reduce the occurrences of SSOs by preemptively targeting areas prone to
the three major causes of SSOs. In FY2016-2017, Utilities cleaned over 272 miles of the 1,718

mile gravity sanitary sewer collection system. Of the 272 miles that were cleaned, 65% or
approximately 177 miles were proactively cleaned by in-house and contracted crews For
FY2017-2018 the goal is to increase the portion of proactive cleaning and exceed our overall goal
by cleaning 20% of the entire gravity collection system.
In 2003 a Grease Interceptor Ordinance was adopted which regulates the operation and
maintenance of residential, commercial and industrial grease trap interceptors. This ordinance
alone has been effective in reducing the amount of grease related SSOs since its adoption. In 2003,
the total number of SSOs spiked at 269; the following year that number dropped by nearly 30 SSOs
and the count of SSOs has made a steady decline since that time. While this ordinance has been
effective, further assistance from the public is necessary to completely solve this problem Over
the past year, in-house personnel have reached out to the public via community events and other
media opportunities in an effort to educate the public on the proper disposal of cooking grease,
fats and other oils. In addition, maintenance personnel have been proactive by cleaning the publicly
maintained portion of sewer connections and keeping sewer main lines clean and free of grease as
well as tree roots and debris. This year, in-house personnel have cleaned 975,153 linear feet of
publicly owned/maintained sewer lines and $495,427 was spent on contracted mainline cleaning
which provided for cleaning of approximately 483,726 linear feet of sewer lines, with an increasing
focus on our large diameter sewer mains. Also, chemical root control contract is anticipated to
treat approximately 202,000 linear feet of sewer main in the upcoming fiscal year.
During FY2016-2017, Utilities continued its proactive efforts toward the reduction of SSOs by
spending over $28 million on the rehabilitation of 88,884 feet of gravity sewer mains, 447
manholes, and 1,276 service laterals. The sewer mains rehabilitated primarily ranged in size from
6" to 54". The mains were rehabilitated by means of pipe bursting, cured -in-place lining of pipes,
total replacements, or a combination of any of these methods. The enhanced condition of these
sewer mains and manholes provided by the rehabilitation projects not only contributed to the
reduction of SSOs but also aided in the reduction of infiltration and inflow by reducing and/or
eliminating sewer system access points for storm water runoff and groundwater. In addition,
Utilities performed closed circuit TV inspection of 773,506 feet of sewer mains. Staff and
contractors also improved the access to collection system through the inspection and
mowing/clearing of approximately 15.98 miles of easements.
Further, staff continued to actively identify and plan for projects in an effort to reduce SSOs and
infiltration and inflow into the sewer system. In addition to the benefits of reducing SSO volume
and the reduction of water getting into the system, these projects have the added benefit of
decreasing the amount of sewer to be treated thereby reducing overall operating costs.
As always, customer involvement will continue to be a factor in the reduction of SSOs. All
customers can do their part in helping to keep the sewer system free of materials that cause
blockages by not dumping debris and fats, oils, or grease into the system.

To report a sewer spill, please contact the City of Winston-Salem 24—hour customer service line
(CityLink) at [phone]. For questions regarding our programs or additional information
regarding this report, please contact Courtney L. Driver, P.E. Utilities Director at [phone].
Copies of this report may be obtained by calling CityLink at [phone] and requesting a
copy. This report is also available at all branches of the Forsyth County Public Library and it is
posted on the Utilities Division's website at http -//www cityofws orgldepartments/utilities/stats-
reports
Certification of Accuracy:
I certify under penalty of law that this report is complete and accurate to the best of my knowledge.
I further certify that this report has been made available to all persons or concerns using the
publicly owned wastewater collection and treatment facilities under the direction of Winston-
Salem/Forsyth County Utilities and that those persons or concerns have been notified as to the
availability of this resort.
Date S .,�;5' I-1
Courtn y L. Dr e. Utilities Director
Winston -Sale o County Utilities

Appendix A: Wastewater Treatment Plant and Pump Station Overflow/Spill Information
Fiscal Year 2016-2017
Month/Year
Flow Discharged From
Treatment Plants, Gallons
Number of
Overflow Events
Reported
Volume of
Overflows,
gallons
Number of
NPDES Permit
Violations at
Treatment Plants
July 2016
975,260,000
0
0
0
August 2016
998,510,000
0
0
0
Sept 2016
876,000,000
1
400
0
October 2016
941,470,000
0
0
0
November 2016
851,400,000
0
0
0
December 2016
908,300,000
0
0
0
January 2017
1,054,000,000
1
532
0
February 2017
838,600,000
0
0
0
March 2017
902,700,000
0
0
0
April 2017
1,172,700,000
2
1142
0
May 2017
1,192,260,000
1
648
0
June 2017
996,500,000
0
0
0
ANNUAL TOTAL
11,707,700,000
5
1 2722
0
Notes:
No NPDES permit violations at either wastewater treatment plant
9/8/2016 AEWWTP spilled 400 gallons of treated effluent water (NPW) into Salem Creek due to a
ruptured NPW line.
1/23/2017 Muddy Creek WWTP had an overflow of 532 gallons of influent wastewater from the
temporary pumping system at South Fork diversion box due to an extreme rainfall event.
4/20/17 AEWWTP spilled 360 gallons of wastewater into Salem Creek due to a Wastage Vault
Overflow
4/25/2017 MCWWTP had an overflow of 782 gallons of influent wastewater from the temporary
pumping system at South Fork diversion box due to an extreme rainfall event.
5/23/2017 MCWWTP had an overflow of 648 gallons of influent wastewater from the temporary
pumping system at South Fork diversion box due to an extreme rainfall event.

Appendix B
35000
30000
25000
20000
15000
Tons
10000
5000
Wastewater Treatment Efficiency During FY2016-17
■Tons Regulated Pollutants Received at Treatment Plants
oTons Regulated Pollutants Allowed in Discharge by Division of Water Quality
©Tons Regulated Pollutants Actually Discharged by Treatment Plants

Appendix C Fiscal Year 2016-2017 Performance Summary of Sewer Collection System
2016-2017 Annual
SSO w/> 1000
SSO w/> 15,000
35,774
11,707,700,000
00035%
TOTAL
Total No of
Notice of
gal in Surface
gal. in Surface
Total SSO
Total Sewer
SSO Percentage
Month/Year
SSO's
Violations
waters*
waters
Volume (gal)
Collected* (gal.)
of Total
July -16
4
0
0
0
1,513
975,260,000
00002%
August -16
7
0
0
0
2,460
998,510,000
00002%
September -16
2
1
1
0
3,863
876,000,000
00004%
October -16
8
0
0
0
2,963
941,470,000
00003%
Nmember--16
6
0
0
0
1,223
851,400,000
00001%
December -16
6
0
0
0
1,263
908,300,000
00001%
January -17
3
0
0
0
500
1,054,000,000
00000%
February -17
8
1
0
0
4,250
838,600,000
00005%
March -17
4
0
0
0
388
902,700,000
06-0-00%
April -17
5
1
1
0
13,323
1,172,700,000
00011%
May -17
7
0
0
0
3,112
1,192,260,000
00003%
June -17
2
0
0
0
916
996,500,000
06001%
2016-2017 Annual
2
0
35,774
11,707,700,000
00035%
TOTAL
62
3
2015-2016 Annual
TOTAL
73
21
12
1
157,949
12,083,570,000
00013%
2014-2015 Annual
TOTAL
86
49
12
1
127,4051
10,753,560,000
00012%
2013-2014 Annual
TOTAL
82
30
15
0
106,384
11,840,630,000
00009%
2012-2013 Annual
TOTAL
111
38
13
2
144,549
11,331,870,000
00013%
2011-2012 Annual
TOTAL
117
61
10
0
65,273
11,289,980,000
00006%
2010-2011 Annual
TOTAL
109
761
15
0
95,342
11,328,410,000
00008%
2009-2010 Annual
TOTAL
106
77
163
1,840,134
12,291,330,000
00150%
2008-2009 Annual
TOTAL
117
88
20
0
85,433
11,607,400,000
0 0007%
2007-2008 Annual
TOTAL
129
N/A
31
1
142,412
11,473,040,000
00012%
2006-2007 Annual
TOTAL
161
N/Al
40
8
571,946
12,475,820,000
00046%
2005-2006 Annual
TOTAL
159
N/A
46
3
317,585
12,182,250,000
00026%
2004-2005 Annual
TOTAL
211
N/A
49
3
246,290
12,621,450,000
000 20%
2003-2004 Annual
TOTAL
241
N
69
2
322,050
12,822,200,000
00025%
2002-2003 Annual
TOTAL
269
N/A
116
16
2,305,175
13,408,980,000
00172%
2001-2002 Annual
TOTAL
228
N/A
70
1
338,806
11,467,900,000
00030%
2000-2001 Annual
TOTAL
193ANIA
84
4
533,108
11,930,700,000
00045%
1999-2000 AnnualTOTAL
189
119
9
1,154,350
12,289,000,000
00094%
1998-1999 Annual
TOTAL
194
118
21
1,541,054
11,804,100,000
00131%

SSO Occurrences attributable to:
FY2016-2017
Percentage
Quantity Total
Grease
11
177%
4,950
Roots
25
403%
11,183
Debris
13
210%
2,525
Inflow & Infiltration
0
00%
0
Vandalism
1
16%
850
Pipe Failure
10
161%
15,316
Pump Station Equipment Failure
0
00%
0
Severe Natural Conditions
0
00%
0
Other
2
32%
1 950
TOTAL
62
1000%
1 35,774
`See Appendix D (attached) for a complete listing of locations, SSO (Sanitary Sewer Overflow) Totals and SSO
"Volume in Surface Water" for all spills during this fiscal year
"This is the total volume of treated waste discharged from the plant but is assumed to be equal to what is collected.

Onncnrl,v n-
Month/Year
Probable Cause of SSO
Total SSO
Volume
(gal.)
SSO
Volume in
Surface
waters
Location of SSO
JULY 2016
7/1/2016
ROOTS
825
825
137 ROSEDALE CIR
7/20/2016
PIPE FAILURE
50
50
4678 PATTERSON AVE
7/22/2016
GREASE
113
113
349 CARVER POINTE
7/29/2016
PIPE FAILURE
525
525
300 CASSELL ST
Total for July
4
1 1,513
1,513
AUGUST 2016
8/1/2016
DEBRIS
500
400
1328 Diggs
8/3/2016
DEBRIS
75
38
2623 STOCKTON
8/6/2016
ROOTS
300
225
1604 TRINITY GARDEN CIR
8/7/2016
DEBRIS
450
450
2298 AUTUMN MIST DR
8/13/2016
ROOTS
450
225
1070 E KENT RD
8/17/2016
ROOTS
10
10
3637 YALE AVE
8/23/2016
ROOTS
675
608
1046 MOTOR RD
Total for August
7
2,460
1,956
SEPTEMBER 2016
9/2/2016
ROOTS
600
300
1834 WAKE FOREST RD
9/21/2016
ROOTS
3,263
3,263
SALEM & ACADEMY ST
Total for September
2
3,863
3,563
OCTOBER 2016
10/06/2016
DEBRIS
250
250
2676 GOLDEN OAKS DR
1 011 01201 06
DEBRIS
225
225
199 WYNBROOK CT
10/12/2016
ROOTS
113
113
518 SHERWOOD HILLS DR
10/17/2016
DEBRIS
100
100
1325 IVY AVE
10/17/2016
DEBRIS
225
169
7641 ROLLING OAK CT
1 0/1 712 01 6
GREASE
1,800
100
100 WESTMEADOW DR
10/24/2016
DEBRIS
100
100
231 HARPER ST
10/25/2016
OTHER
150
150
2805 INDIANA AVE
Total for October
8
1 2,963
1 1,207
NOVEMBER 2016
11/4/2016
DEBRIS
50
50
339 DIXIE BROADWAY
11/8/2016
ROOTS
38
38
4117 CHATHAM HILL DR
11/9/2016
ROOTS
1,050
50
0 MCGREGOR PARK
11/11/2016
ROOTS
5
5
3545 CEDAR POST RD
11/22/2016
ROOTS
30
15
210 W DAVIDSON AVE
11/2/2016
GREASE
50
50
2795 PETERS CREEK PKWY
Total for November
6
1,223
1 208
DECEMBER 2016
12/212016
Debris
225
225
1418 GLADE ST
12/10/2016
Debris
125
125
801 GRAY AVE
12/21/2016
PIPE FAILURE
50
50
912 HUTTON ST
12/22/2016
ROOTS
113
113
1200 WILMAR PLACE CT
12/25/2016
ROOTS
600
1 600
1 O MOCK ST
12/26/2016
GREASE
150
10
4744 BAUX MOUNTAIN RD
Total for December
6
1,263
1,123

JANUARY 2017
1/14/2017
PIPE FAILURE
100
100
875 WEST NORTHWEST BLVD
1/16/2017
GREASE
300
100
1533 JUBILLE TRAIL
1/25/2017
DEBRIS
100
100
1406 DIGGS
Total for January
3
500
300
FEBRUARY 2017
2/1/2017
ROOTS
50
50
702 WEST MOUNTAIN ST
2/2/2017
PIPE FAILURE
200
200
718 ASHVIEW DR
2/7/2017
VANDALISM
850
400
2367 BETHABARA RD
2/8/2017
ROOTS
600
50
2500 REYNOLDS PARK RD
2/8/2017
ROOTS
50
25
127 DAVIE AVE
2/14/2017
OTHER
800
800
718 ASHVIEW DR
2/17/2017
ROOTS
200
100
3500 SALLYKIRK RD
2/18/2017
ROOTS
1,500
200
104 EDGEDALE CT
Total for February
8
4,250
1,825
MARCH 2017
3/9/2017
ROOTS
25.00
25.00
437 GOLDFLOSS ST
3/13/2017
GREASE
10000
100.00
2355 PLEASANT ST
3/17/2017
ROOTS
113.00
113.00
339 PICCADILLY DR
3/31/2017
GREASE
15000
150.00
65 HOSKINS DR
Total for March
4
388
388
APRIL 2017
4/2/2017
GREASE
600
200
455 QUAIL HAVEN LN
4/11/2017
ROOTS
10
10
2315 MARY DEE LN
4/15/2017
ROOTS
225
225
125 LIVINGSTON CT
4/26/2017
PIPE FAILURE
12,375 1
12,375
1 1031 EAST MOUNTAIN ST
4/27/2017
ROOTS
113
113
1060 RANCH DR
Total for April
MAY 2017
5/2/2017
5
GREASE
13,323
150
12,923
150
469 VILLA DR
5/2/2017
DEBRIS
100
100
PARKWAY & MAGNOLIA
5/5/2017
ROOTS
225
225
3120 ORMOND DR
5/17/17
PIPE FAILURE
50
50
1151 CANAL DR
5/17/2017
PIPE FAILURE
500
500
2420 CHEROKEE LN
5/26/2017
GREASE
1,187
593
5277 N CHERRY ST
5/31/2017
PIPE FAILURE
900
900
2321 CHEROKEE LN
Total for May
JUNE 2017
6/5/2017
7
GREASE
3,112
350
2,518
350
364 S CHERRY ST
6/17/2017
PIPE FAILURE
566
566
0 ROMARA DR
Total for June
2
916
916
Total for 2016-2017
62
35,774
28,440