20211566 Ver 2_More Info Received_20220511

Strickland, Bev
From: Harbour, Jeff W <[e-mail]>
Sent: Wednesday, May 11, 2022 12:01 PM
To: Perez, Douglas J
Cc: Steve Kichefski
Subject: [External] RE: 77 Beltway (DWR #21-1566 V2)
Attachments: Pages from Beltway 77 3rd Submittal Full Set.pdf
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Doug, please see the responses to your initial comments below. WE look forward to working with you on this as the
review progresses. Thanks!
i. First, you are only planning for two BMPs to treat the entire site? Correct, Building A flows to the sand filter
beside it. Building C and the road flows to the wet pond plan south. The plan review is under the jurisdiction of
the Town of Huntersville and will comply with all applicable regulations as manded by NCDEQ. The engineer has
included the attached sheet from the SW plan drawings
2. Second, what is the reasoning behind this road stub? That road stub is a Town of Huntersville requirement for
block length and potential future connectivity. There are currently no plans for the adjacent land; however, we
are aware that any future connectivity would also require compliance with Section 404/401 and any potential
impacts from future connectivity would likely be viewed cumulatively and require submittal of an Individual
Permit application.
3. Third, if construction is planned on the up gradient side of the avoided wetland, that could effectively kill the
hydrology of the wetland. How are you planning on maintaining hydrology to that system? During
construction we are temporarily diverting sediment laden water away from the wetland in question to be
captured in a sediment basin. Once the surrounding area is regraded and stabilized, normal overland water flow
can be directed toward the wetland. Below is a photo of W2, which is an old farm pond that has naturalized into
a wetland area.
1

Photograph 4: View of former farm pond at W2. northeastern portion of the property. looking
north.
Jeff Harbour, PWS
Senior Scientist I Natural Resources
2401 Brentwood Road, Suite 107 I Raleigh, NC 27604
D [phone] I M [phone]
jeff.harbour©terracon.com I Terracon.com
IF El 0 CI
From: Perez, Douglas J <[e-mail]>
Sent: Tuesday, May 10, 2022 3:08 PM
To: Harbour, Jeff W <[e-mail]>
Cc: Steve Kichefski <[e-mail]>
Subject: 77 Beltway (DWR #21-1566 V2)
Hey Jeff,
So there's a few questions that we haven't quite answered yet from the previous renditions of this. First, you are only
planning for two BMPs to treat the entire site? Second, what is the reasoning behind this road stub? Third, if
2

construction is planned on the up gradient side of the avoided wetland, that could effectively kill the hydrology of the
wetland. How are you planning on maintaining hydrology to that system?
Let me know,
Doug
DWR
DIvLslon of Wester Pc -sources
Doug Perez - Environmental Specialist
NC Dept. of Environmental Quality (NCDEQ)
Division of Water Resources - Water Quality Regional Operations
6io East Center Ave., Suite 3oi, Mooresville, NC 28115
Phone: [phone] Fax: [phone]o
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BUILDING A
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BUILDING C
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MEMEMEMEME FFE=790.00
FFE=785.00
FFE=809.50
DETENTION BASIN A
(SEE SHEET C814 - SCM DETAIL - BASIN B)
RETAINING
WALL
RETAINING
WALL
RETAINING
WALL
RETAINING
WALL
RETAINING
WALL78078078
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767768762763 SEE SHEETS
C802 TO C809 FOR
STORM PROFILES
DETENTION BASIN A
(SEE SHEET C815 - SCM DETAIL - BASIN A)
MAINTENANCE
ACCESS RAMP
10' MAINTENANCE
ACCESS ROAD
ST:B2500-CB
C402 - AREA 1C403 - AREA 2B
C404 - AREA

3
C403 -
AREA 2A
C405 - AREA 4
BUFFER MITIGATION
BUFFER MITIGATION
9,600 SF BUFFER
MITIGATION AREA
(DRIP LINE NOT
INCLUDED)
22,000 SF BUFFER
MITIGATION AREA
(WETLAND
PRESERVTION)
TREE SAVE (TYP)
TREE SAVE (TYP)
LIMITS OF DISTURBANCE (TYP)
100+1 BUILDING
RESTRICTION FLOODLINE
RETAINING
WALL
LIMITS OF CIP
RETAINING
WALL
GRADING NOTES
1.REFER TO THE GENERAL NOTES SHEET FOR NOTES PERTAINING TO PAVING, GRADING,
ACCESSIBILITY, AND STORM DRAINAGE.
2.EXISTING AND PROPOSED GRADE CONTOURS INTERVALS SHOWN AT 1 FOOT.
3.ALL SPOT ELEVATIONS WITH TP: REPRESENTS THE TOP OF PAVEMENT SURFACE.
4.ALL SPOT ELEVATIONS WITH TC: REPRESENTS THE TOP OF CURB ELEVATION (SUBTRACT 0.50'
FOR GUTTER PAN ELEVATION.)
5.ALL SPOT ELEVATIONS WITH FG: REPRESENT THE FINISHED GRADE.
6.RIM ELEVATIONS OF CURB INLETS (CB) EQUALS THE TOP OF CURB/TOP OF HOOD ELEVATION.
RIM ELEVATIONS OF DROP INLETS (DI), AREA INLETS(AI), MANHOLES(MH), AND CLEANOUTS (CO)
EQUALS THE CENTER OF GRATE OR LID ELEVATION.
7.ALL STRUCTURES SHALL BE ADJUSTED AS NECESSARY TO BE FLUSH WITH FINAL PAVEMENT.
8.MANHOLES WITHIN NON PAVED AREAS SHALL BE 6" ABOVE ADJACENT GRADES. UNLESS
OTHERWISE SHOWN.
9.INLET PROTECTION - CONTRACTOR SHALL PROVIDE CATCH BASIN INLET PROTECTION ON ALL
EXISTING AND PROPOSED INLETS UNTIL CONTRIBUTING DRAINAGE AREAS ARE STABILIZED.
10.CONTRACTOR SHALL PROVIDE SMOOTH TRANSITION BETWEEN PROPOSED PAVEMENT AND
EXISTING PAVEMENT AND STORM STRUCTURES.
11.ALL DRAINAGE STRUCTURES SHALL BE CONSTRUCTED WITH (4) SIDED BEARING HEAVY DUTY
H-20 RATED TRAFFIC RIMS AND GRATES
12.ALL CLEANOUT COVERS WITHIN THE PAVEMENT SECTIONS SHOULD BE RATED FOR HEAVY
DUTY TRAFFIC (H-20 RATED).
13.CONTRACTOR SHALL COORDINATE PAVING IMPROVEMENTS TO AVOID TIRE MARKS FROM
CONSTRUCTION ACTIVITY. FINAL PAVING SHALL BE AS SMOOTH AS POSSIBLE AND FREE FROM
ANY CRACKS, SCRAPES, GOUGES, TIRE MARKS, ETC. CAUSED DURING CONSTRUCTION.
14.DURING CONSTRUCTION AND AFTER FINAL GRADING, NO SURFACE WATER RUNOFF MAY BE
DIRECTED TO ADJACENT PROPERTIES, AND ALL SURFACE WATER RUNOFF MUST BE ROUTED
TO APPROVED DRAINAGE FACILITIES OR BE RETAINED ON SITE. ALL RUNOFF FROM THE SITE,
BOTH DURING AND AFTER CONSTRUCTION, MUST BE FREE OF POLLUTANTS, INCLUDING
SEDIMENT, PRIOR TO DISCHARGE.
RETAINING WALLS SHOWN SHALL BE DESIGNED AND BUILT BY THE CONTRACTOR. WALL DESIGNERS
SHALL PROVIDE SIGNED AND SEALED SHOP DRAWING FOR ALL RETAINING WALLS. WALLS SHALL BE
DESIGNED BY A PROFESSIONAL ENGINEER. SIGNED AND SEALED CALCULATIONS FOR RETAINING
WALLS SHALL BE PROVIDED BY THE WALL DESIGNER. THE ANALYSIS SHALL INCLUDE INTERNAL,
EXTERNAL, GLOBAL STABILITY, AND BEARING CAPACITY CALCULATIONS. THE WALL DESIGNER
SHALL BE RESPONSIBLE FOR SELECTING AND SPECIFYING THE APPROPRIATE REINFORCING FILL
MATERIALS, GEOGRID, AND OTHER WALL APPURTENANCES. THE DESIGN SHALL ADDRESS
HYDROSTATIC LOADING, SEISMIC LOADING, RAPID DRAWDOWN, SURCHARGE, AND BACKSLOPES
WHERE APPROPRIATE.
ADDITIONAL NOTES
1.INSPECTIONS SHALL BE CONDUCTED AS PRESCRIBED BY THE MAINTENANCE COVENANT.
ADDITIONAL INSPECTIONS MAY BE CONDUCTED BY THE TOWN OF HUNTERSVILLE ON ANY
REASONABLE BASIS, INCLUDING BUT NOT LIMITED TO: ROUTINE INSPECTIONS; RANDOM
INSPECTIONS; INSPECTIONS BASED UPON COMPLAINTS OR OTHER NOTICE OF POSSIBLE
VIOLATIONS; INSPECTIONS OF DRAINAGE BASINS OR AREAS IDENTIFIED AS HIGHER THAN
TYPICAL SOURCES OF SEDIMENT OR OTHER CONTAMINANTS OR POLLUTANTS;
INSPECTIONS OF BUSINESSES OR INDUSTRIES OF A TYPE ASSOCIATED WITH HIGHER
THAN USUAL DISCHARGERS OF CONTAMINANTS OR POLLUTANTS OR WITH DISCHARGES
OF A TYPE WHICH ARE MORE LIKELY THAN THE TYPICAL DISCHARGE TO CAUSE
VIOLATIONS OF STATE OR FEDERAL WATER QUALITY STANDARDS OR THE NPDES STORM
WATER PERMIT; AND JOINT INSPECTIONS WITH OTHER AGENCIES INSPECTING UNDER
ENVIRONMENTAL AND SAFETY LAWS. INSPECTIONS MAY INCLUDE, BUT ARE NOT LIMITIED
TO: REVIEWING MAINTENANCE AND REPAIR RECORDS; SAMPLING DISCHARGES, SURFACE
WATER, GROUND WATER, AND MATERIAL OR WATER IN BMPs; EVALUATING THE
CONDITION OF BMPs AND STORM WATER MANAGEMENT PRACTICES
2.RIGHT-OF-ENTRY FOR INSPECTION. WHEN ANY NEW BMP IS INSTALLED ON PRIVATE
PROPERTY, THE PROPERTY OWNER SHALL GRANT TO THE TOWN OF HUNTERSVILLE THE
RIGHT TO ENTER THE PROPERTY AT REASONABLE TIMES AND IN A REASONABLE MANNER
FOR THE PURPOSE OF INSPECTION. THIS INCLUDES THE RIGHT TO ENTER A PROPERTY
WHEN THE TOWN OF HUTNERSVILLE HAS A REASONABLE BASIS TO BELIEVE THAT A
VIOLATION OF THIS REGULATION IS OCCURRING OR HAS OCCURRED, AND TO ENTER
WHEN NECESSARY FOR ABATEMENT OF A PUBLIC NUISANCE OR CORRECTION OF A
VIOLATION OF THIS REGULATION.
Know what's below.
before you dig.Call
R ©NOT FORCONSTRUCTION0FIRST SUBMITTAL11/04/2021KHA1SECOND SUBMITTAL01/28/2022KHA2THIRD SUBMITTAL04/05/2022KHABELTWAY 77PREPARED FORDEVELOPMENT ANDCONSTRUCTION INSIGHTS, LLCNAD83-NC
04/05/2022
GRADING ANDDRAINAGE PLAN -OVERALLC401NORTHWITHIN 5 DAYS OF ALL PERMANENT BUILDINGS REACHING THEIR
FINAL HEIGHT, THE CONTRACTOR SHALL SUBMIT A CERTIFIED 1A
SURVEY OF ALL BUILDING CORNERS (ELEVATION AT GROUND
LEVEL AND TOP OF BUILDING) TO THE ENGINEER FOR FAA FINAL
APPROVAL