20090566 Ver 1_Stormwater Approval_20091203

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NCDENR
North Carolina Department of Environment and Natural Resources
Division of Water Quality
Beverly Eaves Perdue Coleen H. Sullins Dee Freeman
Governor Director Secretary
December 3, 2009
DWQ Project # 09-0566
Johnston County
Mr. Joe Poole
Caterpillar
954 NC 42 East
Clayton, NC 27520
Subject Property: Caterpillar Access Road
UT to Neuse River [030402, 27-(39.7), WSIV, NSW]
STORMWATER MANAGEMENT PLAN APPROVAL
Dear Mr. Poole:
On May 21, 2009, the Division of Water Quality (DWQ) issued a 401 Water Quality Certification to
permanently impact 192 linear feet of perennial stream, 9,770 square feet of Zone 2 Neuse River i
basin protected riparian buffer, and 15,004 square feet of Zone 1 Neuse River basin protected
riparian buffer to facilitate development of the Caterpillar Core PDC site. In order to meet
Conditions 6 and 7 of the 401 Certification for this project, a stormwater management plan prepared „
by your consulting engineer McKim & Creed, dated August 12, 2009, was received by the DWQ on
August 13, 2009. A revised stormwater management plan, dated September 28, 2009, was received
by the DWQ on October 1, 2009, with modifications dated and received on November 5, 2009.
This revised stormwater management plan has been reviewed and satisfies the stormwater
management conditions of the 401 Water Quality Certification.
The stormwater treatment system, which includes the drainage patterns depicted on the plan sheets,
two wet detention ponds, two level spreaders and the ongoing sediment and erosion control plan for
the equipment testing area must be maintained in perpetuity. You also must maintain in perpetuity
the signed and notarized Operation and Maintenance Agreements dated September 25, 2009 (wet
detention ponds) and October 28, 2009 (level spreaders).
No changes to the structural stormwater practices shall be made without written authorization from
the Division of Water Quality. All stormwater management conveyances, detention and treatment
structures shall have maintenance access and at least 10-foot drainage easement on each side to allow
for the ability to maintain the structures, to perform corrective actions and shall provide protection of the
structures from potential alterations by future property owners.
This letter completes the review of the DWQ under Section 401 of the Clean Water Act. If you have any
questions, please contact me at 919-715-3425.
401 Oversight/Express Review Permitting Unit
1650 Mail Service Center, Raleigh, North Carolina 27699-1650
Location: 2321 Crabtree Blvd., Raleigh, North Carolina 27604
Phone: [phone] FAX: [phone]
Internet: http:/.!h2o.enr.state.nc.uslncwetlands/
North Carolina
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An Equal Opportunity's Affirmative Action, Employer
Mr. Joe Poole
Page 2 of 2
December 3, 2009
Sincerely,
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Annette Lucas, PE
401 Oversight/Express Review Permitting Unit
AML/aml
cc: USACE Raleigh Regulatory Field Office
Lauren Witherspoon, DWQ Raleigh Regional Office
DLR Raleigh Regional Office
File Copy
Matt Matthews, DWQ Section Chief
Jeff Mann, MACTEC Engineering and Consulting, Inc., 3301 Atlantic Avenue, Raleigh, NC
27604
Robert B. Hunt, 1441 NC Highway 42 East, Clayton, NC 27527
Filename: 090566CaterpillarAccessRoad(Johnston)S W_Approve.doc