NC0004961_Approval Scope 1, Addendum 1 State Dam ID:GASTO-098_20170202

Energy, Mineral
and Land Resources
ENVIRONMENTAL QUALITY
Final Approval of Repair
February 2, 2017
CERTIFIED MAIL
RETURN RECEIPT REQUESTED
Mr. George T. Hamrick
Senior Vice President
Duke Energy
400 S. Tryon Street, ST06A
Charlotte, NC 28202
RE: Approval Scope 1, Addendum 1
Riverbend Active Secondary Ash Basin Dam
Gaston County
State Dam ID: GASTO - 098
Dear Mr. Hamrick:
ROY COOPER
Governor
MICHAEL S REGAN
Secretary
TRACY E. DAVIS
Director
RECEIVEDUDEWWR
FEB 1 6 2017
Water Quality
Permitting Section
This correspondence concerns the referenced high hazard dam repaired pursuant to issuance of
an Approval of Repair dated August 6, 2015, as required by the Dam Safety Law of 1967. The
repair documentation pertaining to Scope 1, Addendum 1 — (Engineered plan to grout and
abandon the horizontal outlet pipe.) certified by Mr. John A Bove, PE, AECOM, was received
by our office on March 10, 2016.
An inspection of this dam was made by the Land Quality Section staff from the Mooresville
Regional Office on March 3, 2016. The dam repair was found to be in general conformance with
the approved plans and specifications, and continued operation of the dam is hereby approved.
The Land Quality Section staff will make periodic inspections of this dam to verify that the dam
is being maintained in good operating condition. It is advised that you closely inspect and
monitor your dam, and that you notify your engineer and the Division of Energy, Mineral, and
Land Resources if you notice or suspect any problems concerning its safety. The Emergency
Action Plan must be reviewed and updated annually, or as needed by the owner or the owner's
representative.
State of North Carolina I Environmental Quality I Energy, Mineral and Land Resources
1612 Mail Service Center 1 512 N Salisbury St I Raleigh, NC 27699
919 707 9200 T

Mr. George T. Hamrick
Final Approval of Repair -Scope 1, Addendum 1
February 2, 2017
Riverbend Active Secondary Ash Basin Dam
GASTO-098
Page 2 of 2
Please contact the Mooresville Regional Office at [phone] or a staff member of the Dam
Safety Program in the Raleigh Central Office at telephone number [phone] should you
have questions concerning this matter.
Sincerely,
Brian Shane Cook, PE, LSIT
State Dam Safety Engineer
Land Quality Section
BSC/fmt
cc: Mr. John A. Bove, PE, AECOM
Mr. Zahid Khan, CPM, CPESC, CPSWQ, DEMLR Regional Engineer
Mr. Jeff Poupart, Division of Water Resources
Mr. Randy Hart, Duke Energy
Filename GASTO-098 20170202_COFA Riverbend Active Secondary Ash Basin Dam Scope -1, Addendum -1