20100934 Ver 1_More Info Received_20110118

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SRUCTIS TO ALL UTILITY LINE SOPfS LPGS 10 BE OS AT DIROCTIONAL DRILLING
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1 ) STATUTE Z' ADD
FIROVE ST TRETUA AM BED PLURAL f%CAVAIEO MATERIAL TO ORIGINAL PROFILE. STABILIZE BANKS ABOVE WATER W/ PIP-PAP.
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,L, 4
l ADAMS - HEATH ENGINEF,RING, INC.
f6ll_ t IARON II'NfltL
January 11, 2010
Ms. Sue Homewood
North Carolina Department of Environment and Natural Resources
Division of Water Quality
585 Waughtown Street
Winston-Salem, North Carolina 27 1 07-2 24 1
Re: Mount Airy / Pilot Mountain Water System Interconnection Proiect
Sorry County
DWQ It 10-0934
Dear Ms. Homewood:
JAN 4,
Please find enclosed for your review additional information requested it order to process the pending stream crossing
permit application for the above referenced project. This submittal includes revisions and/ or clarifications made to
address comments received from your office. Your office's comments with our responses are as follows:
1. NCDENR: Please provide a final SEPA approval issued from the State Clearing House.
AHE: A copy of the final State Clearinghouse approval is attached.
2. NCDENR: Per the requirements of GC 3821, all work must be done "in the dry". Therefore, dewatering
methods will be necessary to temporarily dewater the stream channel during pipe installation.
Please provide a construction sequence that details the method of dewatering to be utilized at
the site and the sequence of construction events to be followed to ensure compliance with this
condition.
AHE: We have attached for your consideration an 11x17 copy of Plan Sheet 29 and two (2) 8-1/2 x 11
enlarged details, one for directionally drilled crossings and one for open cut channel crossings. In the
overall project, there are a total of ten (10) water line stream crossings. Of those, one (1) is required to
be directionally drilled and the remaining nine (9) are designated to be Contractor's option -
directional drill or open cut For directional drilling, there would be no disturbance. For the open cut
installations, the sequence indicates that a temporary flume pipe is to be used to maintain water flow
and provide a dry work area for the pipe crossing.
3. NCDENR: Per the requirements of GC 3821, please enumerate all temporary impacts to the stream
channels. Temporary impacts also include areas of distu•baneenecessaryfor proper dewatering
measures and any temporary erosion conbrot measures expected to be installed within any
jurisdictional areas. Please note that temporary impacts should be minimized to the maximum
extent practical.
AHE: We ]rave attached for your consideration a revised page 4 of the PCN Form. Item 3g has been revised
to indicate up to 15 linear feet of disturbance at each open cut location. This would provide enough
broom for installation ofa 15' long temporary flume pipe and the cofferdams at each end. Revising to
15 IT -i-/- at each installation would increase the total impact to 135 LF +/-.
TEL: [phone] NORTH MAIN STREET FAX: [phone]
GALAX, VIRGINIA 24333
Ms. Sue Homewood
Page 2
4. NCDENR: Please provide a construction sequence and details (plans/drawings) that detail the restoration
of the temporary impact areas upon completion of the project.
AIIh: The enclosed sequence does describe the restoration.
We hope that the revisions/clarifications made have satisfactorily addressed you office's concerns. If you have any
questions or need additional information, feet free to call.
Sincerely,
ADAMS-I-IEATII ENGINEERING, INC.
?44lk
Kevin Heath, P.E
Cc: Mitch Williams, P.E., City of MountAiry w/ attachments
Monte Matthews, U.S. Army Corps of Engineers, Raleigh Regulatory Field Office (via cmait) w/ attachments
KH/set
ADAMS - HEATH ENGINEERING, INC.
- - -
CIVI/ -EN1?IRO ?M NTAL
0
North Carolina
Department of Administration
Beverly Eaves Perdue, Governor
December 10, 2010
Ms. Shannon "Pate
City of Mount Airy
c/o Adams-Heath Engineering, Inc.
119 North Main Street
Galas, VA 24333
Dear Ms. Tate:

I q it
i

Moses Carey, Jr., Secretary
Ile: SCII File # 10-E+-0000-0439; EA/FONSI; Mount Airy Pilot Mountain King Water System
Interconnection project involves construction of water transmission lines; Mount Airy and
Pilot Mountain then interconnection of Pilot Mountain'
Attached is the response from the Department of Environment and Natural Resources (DI.,NR) to your
letter dated November 18, 2010 that addressed concerns raised by the Division of Water Resources for
the above referenced project.
If any further environmental review documents are prepared for this project, they should be forwarded to
this office for intergovernmental review.
Should you have any questions, please do not hesitate to call.
Sincerely,
Sheila Green
State Environmental Review Clearinghouse
Attachments
Alailing-Add,ess: Telephoiper (419),807-2425 Location AdQrem
1301 Mail Service Center Fax [phone] Wcst Joiies Street
Ralcigh,NC 2761Y9-1391 State Courier 451-01-00 Raleigh, North Carolina
e-mail slatGClG'dPtng7tOw3e(e?> ou:ae.gov
A« Equal C)pporGrniry,:iffinjrntlne Adron E "1'1QV r
tic
N'VP W. M %i;
'1f rS w ai?r b. 1 N.;•-;i ,n.etRi d J<i esl r .=3 ? N.§,siid
it It F s )3 ePS..
thl,wrwl
i=i t(,IPAliDu pm
TO: Shelia Green
5 LI--- A
. >.,r s t ANNE,,
:... s-..... '
EMI:
``..i. C.JIi; „La I is-'::taw t ,o< 3, 22tor
RE: 10-0439 j ,N:`I; Mount Airy Pilot Mountain King..
water system lnte coon -.... 1.on ; _ }kes SL . ' ' r ..::5.6.5
DATE; , 2010
This is to advise the
.
applicant that Lhe additional
i.;S'f`J mats o . provided ed on he DrQpo _ d project ddi e s s He
S:Ic,^.ar Eeente c,,jnce i:s
We appreciate the applicant working with our review
agencies.
01w
NorthCarolitiva
Ft e .te rr9 ?}?, h\ e1?'t e) 4 In: ?t ,r s?}t e e a u?
2. Wetland Impacts
If there are wetland impacts proposed on the site, then complete this question for each wetland area impacted.
2a. 2b. 2c. 2d. 2e. 2f.
Wetland impact Type of jurisdiction
number - Type of impact Type of wetland Forested (Corps - 404, 10 Area of impact
Permanent (P) or (if known) DWQ - non-404, other) (acres)
Temporary (T)
W1 ?
P ? T ? Yes ? Corps
, ? No ? DWQ
W2 ? P ? T ? Yes ? Corps
? No ? DWQ
W3 ? PEI T ? Yes ? Corps
? No ? DWQ
W4 ? PEI T ? Yes ? Corps
? No ? DW_Q
W5 ? PEI T ? Yes ? Corps
? No ? DWQ
W6 ? P ? T ? Yes ? Corps
? No ? DWQ
2g.'Total wetland impacts
2h. Comments:
3. Stream Impacts
If there are perennial or intermittent stream impacts (including temporary impacts) proposed on the site, then complete this
question for all stream sites impacted.
3a. 3b. 3c. 3d. 3e. 3f. 3g.
Stream impact Type of impact Stream name Perennial Type of jurisdiction Average Impact
number - (PER) or (Corps - 404, 10 stream length
Permanent (P) or intermittent DWQ - non-404, width (linear
Temporary (T) (I NT)? other) (feet) feet)

S1 ? P ®T
Stream Crossing U.T to Stoney
Creek ® PER
?INT ? Corps
® DWQ
5
15+/-
S2 ? PEI T Stream Crossing Stoney Creek ® PER
El INT ? Corps
® DWQ 15+1- 15+/-
S3 ? P ®T
S3 Stream Crossing U.T. to Flat Shoal ® PER
? INT ? Corps
® DWQ < 5 15+/-
S4 ? P ®T Stream Crossing U.T. to Flat Shoal ® PER ? Corps < 5 15+/
Creek ? INT ® DWQ
S5 ? P ®T Stream Crossing U.T. to Flat Shoal
Creek ® PER
? INT ? Corps
® DWQ 10+/- 15+/
S6 ? P ®T Stream Crossing U.T. to Flat Shoal ® PER ? Corps < 5 15+/
Creek ? INT ® DWQ
S7 ? P ®T Stream Crossing Flat Shoal Creek ® PER
? INT ? Corps
® DWQ 15+/-
_ 15+/
S8 ? P ®T Stream Crossing U.T. to Toms

Creek ® PER

? INT ? Corps

® DWQ 10+/-
15 +/
? P ®T
S9 Stream Crossing U.T. to Toms
Creek ® PER
? INT ? Corps
® DWQ 5+/- 15+/
S10 ? P ? T Stream Crossing Toms Creek ® PER ? Corps 45 +/
? INT ® DWQ N/A - 0
311. Total stream and tributary impacts 135 LF +/-
N. Comments: Impact lengths estimated by using a typical 15' width disturbed when crossing streams
Page 4 of 10
PCN Form - Version 1.3 December 10. 2008 Version
ALT RNATII, STk', EAM CROSSING ML?1110D
RUDE ORCE/RFPLACF
EXCAVATED STREAMBANK
ABOVE STREAM WATER
LEVEL W/GLASS I RIP-RAP
ANCHOR CASING PIPE
10 CONCRETE
W/ 3/8..x7..
GALV. STEEL STRAP
& EMBEDDED
ANCHOR BOLTS
TEMPORARY SILT
FENCE
ITTAIML PIPE CROSSING -- TYPICAL, DIFTAIL
TEMPORARY FLUME PIPE OR PIPES,
15 LF MAX LENGTH
NON-ERODIBLE BARRIER NCDOT
CLASS A EROSION CONTROL-
STONE RIP-RAP. OR SANDBAGS
EXISTING-
GRADE
BACKFILL STREAMBEAO
TO ORIGINAL GRADE W/
MATERIAL EXCAVATED
FROM STREAM
60" MIN. COVER
BELOW STHEAMBEO
STREAM
I
7.s'MAX TYP.
EACH SIDE
PLAN
CONTINUOUSLY WELDED
STEEL CASING PIPE
REINFORCED CONCRETE
END SUPPORT ANCHOR
NON-ERODIBLE BARRIER
NCOOT CLASS A
EROSION CONTROL
STONE RIP-RAP, OR
SANDBAGS
CARRIER PIPE
- CREEK BANK BEYOND
15' MAX IN-STREAM
DISTURBANCE WIDTH__
5' MAX-
EXCAVATED WIDTH
TEMPORARY FLUME STRE
PIPE OR PIPES
EXTEND END SUPPORT
MIN.
ANCHOR 36" MIN. COVER BELOW
BEYOND OUTSIDE EDGE 0 CO
OF CASING PIPE (TYP_) STREAMBED
STEEL CASING_
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INTERNAL PIPE BACKFILL STREAMBEAD
SUPPORTS TO ORIGINAL GRADE W/ -
AS REQ'D. MATERIAL EXCAVATED
FROM STREAM
'
TEMPORARY FLUME PIPE SECTION
OR PIPES, 15 LF MAX LENGTH
TEMPORARY DEWATERING STRUCTURE
SHALL CONFORM TO THE LATEST NO
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DESIGN MANUAL HANDBOOK STANDARD
6.60.1 FOR TEMPORARY SEDIMENT TRAP
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INTERNAL PIPE
EXTEND FND _ SUPPORTS
SUPPORT ANCHOR AS REO'D.
36" MIN. BELOW _ REINFORCED CONCRETE
BOTTOM OF CASING END SUPPORT ANCHOR
PROF ILN
REINFORCE/REPLACE
EXCAVATED STREAMBANK
A130VE STREAM WATER LEVEL
W/ CLASS I RIP-RAP
SEAL BOTH ENDS
/-OF CASING W/
GROUT
CARRIER PIPE
1-.--12" MIN.
-1 L--- 24" MIN.
CONTINUOUSLY
WELDED CASING
PIPE
NOTE: THE FLUME PIPE METHOD SHALI. ONLY BE AUTHORIZED AT THOSE LOCATIONS DESIGNATED ON THE PLANS AS OPEN CUT AND
ENCASE. CONTRACTOR MAY ELECT TO COMPLETE ANY CROSSING BY DIRECTIONAL DRILLING.
STEP 1) CONSTRUCTION SHALL BE DONE IN LOW FLOW PERIODS & WITH FUME PIPE OPERATIONAL.
STEP 2) CROSSING SHALL BE ACCOMPLISHED IN A MANNER THAT WILL NOT PROHIBIT FLOW OF STREAM.
STEP 3) INSTALL TEMPORARY SILT FENCES TO CONTROL APPROACH AREAS.
STEP 4) INSTALL FLUME PIPE & NON ERODIBLE BARRIER TO MAINTAIN STREAM FLOW. LIMIT DISTURBANCE TO G15 LF OF STREAM.
STEP 5) DEWATER W/IN DAMMED OFF AREA INTO SEDIMENT TRAPPING DEVICE USING A PUMP.
STEP 6) EXCAVATE TRENCH & INSTALL PIPE.
STEP 7) BACKFILL STREAMBED WITH EXCAVATED MATERIAL TO ORIGINAL PROFILE. STABILIZE BANKS ABOVE WATER W/ RIP RAP.
STEP 8) REMOVE BARRIER & FLUME PIPE.
STEP 9) IMMEDIATELY STABILIZE & REVEGETATE STREAM BANKS BY SEED, MULCH & STRAW.
NOTE: FLUME PIPE CROSSING METHOD TO HE USED WHEN IN -STREAM CONSTRUCTION WILL LAST 46 HOURS OR LESS & STREAM IS LESS
THAN 20' WIDE.
PURPOSE:
TO EXTEND WATER SERVICE FROM
MOUNT AIRY TO PILOT MOUNTAIN
COMMUNITIES.
MOUNT AIRY/PILOT MOUNTAIN
Water System
Interconnect Project
IN: Various Streoms
COUNTY OF: Sorry STATE: NC
APP[ CA IIOIJ BY
City of Mount Airy
SHEET 1 DATE O3/11/10
ALTIJ'R NATI? S`I'IZNAM CROSSING METt101)
D]RITCT10NAL [)RtLl, PIPE CROSSING - TYPICAL DETAIL
SIRE AM
CONCRETE ANCHOR BLOCKS
& TRANSITION FROM HDPE
PIPE 10 DUCTILE IRON PIPE
DUCTILE IRON
CARRIER PIPE
TEMPORARY SILT
FENCE INSTALLED
© TOP OF BANK
EXISTING
GRADE
HOPE CARRIER PIPE -
DIRECTIONALLY DRILLED
BELOW SIREAMBED
HOPE CARRIER PIPE
-DIRECTIONALLY DRILLED
BELOW STREAMBED
PLAN VIEW
TEMP. DEWATERING STRUCTURE
SHALL CONFORM TO THE MOST
CURRENT NC EROSION & SEDIMENT
CONTROL PLANNING & DESIGN
MANUAL HANDBOOK STANDARD
6.60.1 FOR TEMP. SEDIMENT TRAP

SILT FENCE
TOP OF DANK
STREAM
5' MINIMUM COVER
BELOW SIREAMBED
PROII'ILE SECTION
DUCTILE IRON
CARRIER PIPE
CONCRETE ANCHOR BLOCK
& TRANSITION FROM HOPE
PIPE TO DUCTILE IRON PIPE
NOTE: THIS DETAIL APPLIES TO ALL UTILITY LINE STREAM CROSSINGS SPECIFIED TO BE COMPLETED BY DIRECTIONAL DRILLING
1) CONSTRUCTION SHALL. BE DONE IN LOW STREAM FLOW PERIODS WITH NO FORECAST PRECIPITATION.
2) NO IN-STREAM WORK WILL BE ALLOWED.
3) INSTALL EROSION CONTROL MEASURES; SILT FENCE AND TEMPORARY SEDIMENT TRAP.
4) EXCAVATE BORE AND RECEIVING PITS ON OPPOSITE SIDES OF STREAM.
5) DIRECTIONALLY DRILL AND INSTALL HDPE CARRIER PIPE BELOW STREAMBED.
6) INSTALL TRANSITION RTTINGS, CONNECTING HDPE PIPE TO DUCTILE IRON PIPE.
7) INSTALL CONCRETE ANCHOR BLOCKS Al PIPE TRANSITION AREAS.
8) EXTEND DUCTILE IRON CARRIER PIPE BEYOND BORE AND RECEIVING PITS.
9) REMOVE DRILLING EQUIPMENT; BACKFILL 130RE PIT, RECEIVING PIT, & SEDIMENT TRAP TO GRADE.
10) STABILIZE AND REVEGETATE DISTURBED WORK AREAS WITH SEED, STRAW, AND/OR MULCH AS REM),
11) REMOVE TEMPORARY SILT FENCE AFTER REVEGETATION IS COMPLETE.
PURPOSE:
TO EXTEND WATER SERVICE FROM
MOUNT AIRY TO PILOT MOUNTAIN
COMMUNITIES.
MOUNT AIRY/PILOT MOUNTAIN
Water System
Irnterconnect. Project
IN: Vorious Streams
COUNTY Of Surry STATE: NC
APPLICATION BY:
City of Mount Airy
SHEET 2 DATE 03/11/10