20080146 Ver 1_More Info Received_20080220

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ENGINEERING DEPARTMENT
February 15, 2008

DWQ Wetlands Unit
1650 Mail Service Center
Raleigh, NC 27699-1650
Attn: Cyndi Karoli and Ian McMillan
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JfJL'IWDSANU
Re: NC DWQ PCN Submittal - Summerwinds Water and Sewer Extension Project
Dear Ms. Karoli and Mr. McMillan,
Upon receipt of your letter dated February 4, 2008, the issue of a possible
perpendicular crossing was discussed with several of the Town's Stormwater
Engineering staff.
The alignment in question was relocated to the present location per a discussion with
Lia Myott. The Town of Cary purchased easements from citizens, at a substantial
expenditure of time and money, thinking this was the best, least destructive
alignment possible.
If the sewer main is moved downstream, from its proposed location, the pipe will
cross the stream in an aerial manner, approximately 1 to 1.5 feet from the creek
invert, causing a possible flooding problem. Also, if the sewer main is moved
downstream from its proposed location, this will move the sewer main into the Zone 2
buffer of the lake, increasing the overall amount of the Zone 2 buffer impacts from
406 ft2 to over 1,500 ft2.
If the sewer main is moved upstream, from its proposed location, the sewer main will
be installed in a much deeper trench, thereby increasing the width of the easement
required for installation, and increasing the amount of buffer impacts. The existing
easement is 20 feet wide. If the sewer main were moved upstream, the easement
would be either 35 or 40-feet wide. The determine the actual width, the Town would
have to send a survey crew into the field to collect more topographic information. If
the proposed 20 foot easement were increased to 35 or 40 foot, this would in turn
increase the buffer impacts. Also, if the sewer main were moved upstream from its
proposed location, it would necessitate the removal of eight mature trees, instead of
two. The property owner in this area had asked that we leave as many trees as
possible, so that he could retain a buffer between his back yard and the adjoining
TOWN Of CARY
316 North Academy Street -Cary, NC 27513-PO Box 8005-Cary, NC 27512-8005
te1919-469-4030 - fax [phone]- www.townofcary.org
neighborhood on the opposite side of the creek. If these eight trees are removed, no
buffer will remain in this area.
At this time, the Town, feels that there is no practical alternative other than the
alignment shown in the original proposal. We feel that this alignment is the most
environmentally protective approach in this particular situation. If there is continued
disagreement, we would ask that someone from your office meet with Town Staff at
the site, so that we can come to an agreement on a final alignment.
I have forwarded one copy of this response to the USACOE.
If you have any questions or need any other information concerning this project,
please contact me at 919-469-4335 or at iarrod.buchanan(a?townofcary.org.
Sincerely,
Jarrod A. Buchanan, P.E.
Project Manager
Enclosures
RAEngineeringDept\PROJECTS (Capita1)\Sewer\SW5005 - Summerwinds 1 &2 - Jarrod\Creek Crossing\DWQ PCN Cover Letter-Moc
ENGINEERING DEPARTMENT
February 15, 2008
USACOE
3331 Heritage Trade Drive
Suite 105
Wake Forest, NC 27587
Attn: Jamie Shern
Inv
F ,?u??y CN
?tiNR-`N?'?t MWA??SRAN
??pplDS AND SZ?
Re: PCN Submittal - Summerwinds Water and Sewer Extension Project
Dear Mr. Shern:
Upon receipt of the DWQ Wetlands Unit letter dated February 4, 2008, the issue of a
possible perpendicular crossing was discussed with several of the Town's
Stormwater Engineering staff.
Please find one copy of the letter of response for the Summerwinds Water and Sewer
Extension Project enclosed. I have forwarded seven copies of this letter to the Cyndi
Karoly at North Carolina DWQ as required.
If you have any questions or need any other information concerning this project,
please contact me at 919-469-4335 or at iarrod.buchanan(a?townofcary.org.
Sincerely,
9Jarro A. Buchanan, P. E.
Project Manager
Enclosures
R:\EngineeringDept\PROJECTS (Capita l)\Sewer\SW5005 - Summerwinds 182 - Jarrod\Creek Crossing\COE Cover Letter-2.doc
TOWN Of CARY
316 North Academy Street -Cary, NC 27513-PO Box 8005-Cary, NC 27512-8005
tel [phone] - fax [phone]- www.townofcary.org
ENGINEERING DEPARTMENT
February 15, 2008
DWQ Wetlands Unit
1650 Mail Service Center
Raleigh, NC 27699-1650
Attn: Cyndi Karoli and Ian McMillan

Re: NC DWQ PCN Submittal - Summerwinds Water and Sewer Extension Project
Dear Ms. Karoli and Mr. McMillan,
Upon receipt of your letter dated February 4, 2008, the issue of a possible
perpendicular crossing was discussed with several of the Town's Stormwater
Engineering staff.
The alignment in question was relocated to the present location per a discussion with
Lia Myott. The Town of Cary purchased easements from citizens, at a substantial
expenditure of time and money, thinking this was the best, least destructive
alignment possible.
If the sewer main is moved downstream, from its proposed location, the pipe will
cross the stream in an aerial manner, approximately 1 to 1.5 feet from the creek
invert, causing a possible flooding problem. Also, if the sewer main is moved
downstream from its proposed location, this will move the sewer main into the Zone 2
buffer of the lake, increasing the overall amount of the Zone 2 buffer impacts from
406 ft2 to over 1,500 ft2.
If the sewer main is moved upstream, from its proposed location, the sewer main will
be installed in a much deeper trench, thereby increasing the width of the easement
required for installation, and increasing the amount of buffer impacts. The existing
easement is 20 feet wide. If the sewer main were moved upstream, the easement
would be either 35 or 40-feet wide. The determine the actual width, the Town would
have to send a survey crew into the field to collect more topographic information. If
the proposed 20 foot easement were increased to 35 or 40 foot, this would in turn
increase the buffer impacts. Also, if the sewer main were moved upstream from its
proposed location, it would necessitate the removal of eight mature trees, instead of
two. The property owner in this area had asked that we leave as many trees as
possible, so that he could retain a buffer between his back yard and the adjoining
TOWN Of CARY

316 North Academy Street -Cary, NC 27513-PO Box 8005-Cary, NC 27512-8005
te1919-469-4030 - fax [phone]- www.townofcary.org
neighborhood on the opposite side of the creek. If these eight trees are removed, no
buffer will remain in this area.
At this time, the Town , feels that there is no practical alternative other than the
alignment shown in the original proposal. We feel that this alignment is the most
environmentally protective approach in this particular situation. If there is continued
disagreement, we would ask that someone from your office meet with Town Staff at
the site, so that we can come to an agreement on a final alignment.
I have forwarded one copy of this response to the USACOE.
If you have any questions or need any other information concerning this project,
please contact me at 919-469-4335 or at larrod.buchanan(a-)-townofcary.org.
Sincerely,
Jarrod A. Buchanan, P.E.
Project Manager
Enclosures
RAEngineeringDept\PROJECTS (Capital)\Sewer\SW5005 - Summerwinds 1&2 - Jarrod\Creek Crossing\DWO PCN Cover Letter-3.doc