20150261 Ver 1_More Info Received_20150426

Kimley >>> H®rn
April 24, 2015
Ms Karen Higgins
NC Division of Water Resources
512 N Salisbury Street
Raleigh, NC 27604
RE- Union Chapel Test Well and Raw Water Line Project
Request forAdditional Information and Response to Comments
Dear Ms Higgins
On behalf of the Onslow Water and Sewer Authority ( ONWASA), Kimley -Horn is submitting the
enclosed additional information for the above referenced project per the NC Division of Water
Resources (NCDWR) Request for Additional Information letter dated April 7, 2015
In addition to the items discussed below, ONWASA has amended the permit application package
based on comments provided by the US Army Corps of Engineers ( USACE) regarding directional
drilling through wetland areas to minimize or reduce impacts As submitted to the USACE on March
27, 2015, directional drilling is not practical for the proposed project due to the cost of the directional
drill, and due to the limitations of the directional drilling methodology itself Directional drilling requires
a deeper installation depth than open cut trenching, which would make any repair or maintenance on
the water line difficult to impossible Also given the additional depth requirement, the initial drill rig and
pullback setup at the termini of the directional drill run requires large amounts of excavation and
disturbance to meet depth and staging requirements of the equipment, which would result in
additional clearing and disturbance compared to open cut trenching for this water line installation
Directional drilling is further impractical due to the minimum bend radius required by the directional
drill alignment, which would necessitate that the three wetlands be spanned by a single directional
drill run The single, long directional drill installation would substantially increase the project's cost to
the point of being cost - prohibitive at this scale Due to all of the above reasons, directional drilling is
impractical for this proposal, and the minimal wetland impacts proposed by open cut trench
installation are the most cost effective and minimally invasive option for this project
The USACE also requested additional details regarding vegetative restoration to the temporary
wetland impact areas proposed in the PCN form A vegetative restoration requirement has been
added to the engineering specifications to be included with the project documents and all plan sheets
The vegetative restoration specification is to be applicable to any disturbance in wetland areas shown
in the plan sheets or resulting from the proposed project The specification states
Within 30 days of completion of the work, temporary wetland impact areas shown on the
construction plans will be restored to pre - existing grades and planted with an appropnate
native wetland seed mix Pnor to initiating the wetland Impacts, the contractor will note
existing tree lines or forested areas In the wetland to be restored In addition, each temporary
wetland impact area will be planted with containenzed saplings, live stakes, or bare roots, as
determined by the contractor in the field, installed at a spacing of two to three feet on center,
and to include least two of the following species

Kimley »>Horn
Page 2
Paw paw (AsIm/na tnloba)
Tulip poplar (Lmodendron tulipifera)
Red maple (Acerrubrum)
American sycamore (Platanus occidentalis)
River birch (Betula nigra)
Redbay (Persea borborna)
Ironwood (Carpmus carolrmana)
Swamp chestnut oak (Quercus michauxu)
Bitternut hickory Carya cordiformis
Water oak (Quercus nigra)
Persimmon (Diospyros virgirnana)
Cherrybark oak (Quercus pagoda)
Green ash (Fraxinus pennsylvanica)
Willow oak (Quercus phellos)
Black walnut (Juglans nigra)
American elm (Ulmus amencana)
Additionally, below is an outline of the received NCDWR comments along with a brief narrative that
addresses each item
1) Application Form was not signed Page 11 of 11 of the Pre - Construction Notification (PCN)
Form was not signed Pursuant to 15A NCAC 02H 0502(f) the application form must be
signed by the owner or the owner's agent If an agent of the owner signs the application form,
an agent authorization form must also be included An example agent authonzation form can
be found online
htto / /www saw usace armv md/ Portals /59 /dots /reaulatory /reodocs /Permits /SAMPLE AGEN
T AUTHORIZATION FORM pdf Please submit four (4) copies of this documentation
a Kimley -Horn response The PCN Form has been signed by Kimley -Horn, an
authorized agent of ONWASA, and an agent authorization form has been included
Four copies have been included as requested
2) Need more copies of the application Pursuant to 15A NCAC 02H 0502 and G S 143-
215 3D(e), the Division requires four (4) complete application packages, to begin the proper
consideration of an application We received 1 copy of the application, however we require 4
copies of the application Please submit 3 additional copies of the application
a Kimley -Horn response Four copies of the complete and signed application package
have been included as required
If there is any additional information that you need to assist in the processing of this permit application
package, please do not hesitate to contact me at [phone]
Very truly yours,
Kimley -Horn and Associates, Inc
Jason Hartshorn
Attachments
Cc Mr Carly Baker, Onslow Water and Sewer Authority
Mr Pete Crum, PWD, Kimley -Horn