Verson 2 Aero Center Wilmington Aricraft Hanger - Proposed Site Plan Set 11.19.2020A
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Name and address of owner:New Hanover County230 Government Center DriveWilmington, NC 28403Name of 24-hour contact who is responsible for erosion and sediment control:Aaron Hope (AMH Construction)407-920-855030 S Ivey LaneOrlando, FL 32811Name address and phone number of primary permittee:Marathon FBO Partners DBA Aero Center Wilmington (Lessee)305-549-401119018 Eastwood RoadWilmington, NC 28403Engineer's name, address and phone numberJASON M SMITH, PEJ M Smith Engineering LLC155 Clarkesville StreetCornelia, GA 30531(678) 267-3690Water system:Cape Fear Public Utility Authority (CFPUA)Sewer System:Public SewerZoning:A-I-A-ISETBACKS: Front: 50 ft from right of way Side: 15 ft from lease line Rear: Based on Minimum Taxiway clearance per FAAMAX BUILDING HEIGHT: per building codeTOTAL SITE ACREAGE/DISTURBED ACREAGE - 2.26 acres/ 2.3 ACRESTOTAL SITE ACREAGE INCLUDES ALL PARCELS INVOLVED IN GRADING
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24 HOUR CONTACT:Christ DeVoter - South State Bank(803) 231-3572General Notes:
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J M Smith Engineering LLC
FAX (678) 267-3731LOCAL (706) 894-2331CORNELIA, GEORGIA
ENGINEERS AND CONSULTANTS
155 CLARKESVILLE STREET
30531 www.jmsmithengineering.com
TEL (678) 267-3690POST OFFICE BOX 331
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Printed:J:\Jobs\274 - Sandbar Architects\2020-274-01 ILM Wilmington\CON DWG\SHEETS\SHEETS2.dwg Nov 19, 2020 - 5:18pm
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Aero Center Wilmington1830, 1834 & 1835 Flightline Road Wilmington, GA 28405 313915.53.7748.000New Hanover County, NC County, NC
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NOTE:Boundary information as per client. The lease area will be finalizedonce the design of the site is finalized. Boundary informaiton forcoordination purposes only and should not be considered a boundarysurvey. J M Smith Engineering Assumes no responsibility for theaccuracy of the boundary information as shown.. Topographicinformation as provided by the client from various survey sources.The information has been compiled into an overall existing conditions.J M Smith Engineering Assumes no responsibility for the accuracy ofthe boundary information as shown.. J M Smith Engineering LLCdoes not warrant the accuracy of the information provided from thesurveyor.B
C
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J M Smith Engineering LLC
FAX (678) 267-3731LOCAL (706) 894-2331CORNELIA, GEORGIA
ENGINEERS AND CONSULTANTS
155 CLARKESVILLE STREET
30531 www.jmsmithengineering.com
TEL (678) 267-3690POST OFFICE BOX 331
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Printed:J:\Jobs\274 - Sandbar Architects\2020-274-01 ILM Wilmington\CON DWG\SHEETS\SHEETS2.dwg Nov 19, 2020 - 5:18pm
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Aero Center Wilmington1830, 1834 & 1835 Flightline Road Wilmington, NC 28405 313915.53.7748.000New Hanover County, NC County, NC
11
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NOTE:Boundary information as per client. The lease area will be finalizedonce the design of the site is finalized. Boundary informaiton forcoordination purposes only and should not be considered a boundarysurvey. J M Smith Engineering Assumes no responsibility for theaccuracy of the boundary information as shown.. Topographicinformation as provided by the client from various survey sources.The information has been compiled into an overall existing conditions.J M Smith Engineering Assumes no responsibility for the accuracy ofthe boundary information as shown.. J M Smith Engineering LLCdoes not warrant the accuracy of the information provided from thesurveyor.B
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FAX (678) 267-3731LOCAL (706) 894-2331CORNELIA, GEORGIA
ENGINEERS AND CONSULTANTS
155 CLARKESVILLE STREET
30531 www.jmsmithengineering.com
TEL (678) 267-3690POST OFFICE BOX 331
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8/10/15 REVISED PER FORSYTH COUNTY COMMENTSB
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J M Smith Engineering LLC
FAX (678) 267-3731LOCAL (706) 894-2331CORNELIA, GEORGIA
ENGINEERS AND CONSULTANTS
155 CLARKESVILLE STREET
30531 www.jmsmithengineering.com
TEL (678) 267-3690POST OFFICE BOX 331
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Aero Center Wilmington1830, 1834 & 1835 Flightline Road Wilmington, NC 28405 313915.53.7748.000New Hanover County, NC County, NC
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Designer 's Plan Certification"I hereby certify that this plan has been prepared in accordance with the latest New Hanover County Ordinances and StormWater Design Manual."Signature: ____________________________Printed Name and Title: Jason M. Smith, PE_Date: 11/17/2020_Registration Number: 034070_Property Owner Certification:"I (We) hereby certify that I (we) am (are) the current owner of the property ·and that upon receipt of"Authorization-To-Construct" any clearing, grading, construction or development, will be performed in accordance with this planand that the applicable ordinances and rules of New Hanover County, the State of North Carolina and the Federal Governmentand its agencies which are hereby made part of this· plan. As the owner, I (we) accept full responsibility for the construction andoperation and maintenance of the proposed facilities. I (We) will not attempt to transfer of this responsibility without thewritten authorization of New Hanover County."Signature: ____________________________Printed Name and Title: ____________________________Date:____________________________
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FAX (678) 267-3731LOCAL (706) 894-2331CORNELIA, GEORGIA
ENGINEERS AND CONSULTANTS
155 CLARKESVILLE STREET
30531 www.jmsmithengineering.com
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120.3'125.3'
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SSSSSSSS
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SITE DATA TABLENUMBER OF PARKING SPACESB
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J M Smith Engineering LLC
FAX (678) 267-3731LOCAL (706) 894-2331CORNELIA, GEORGIA
ENGINEERS AND CONSULTANTS
155 CLARKESVILLE STREET
30531 www.jmsmithengineering.com
TEL (678) 267-3690POST OFFICE BOX 331
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Printed:J:\Jobs\274 - Sandbar Architects\2020-274-01 ILM Wilmington\CON DWG\SHEETS\SHEETS2.dwg Nov 19, 2020 - 5:21pm
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Aero Center Wilmington1830, 1834 & 1835 Flightline Road Wilmington, NC 28405 313915.53.7748.000New Hanover County, NC County, NC
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Designer 's Plan Certification"I hereby certify that this plan has been prepared in accordance with the latest New Hanover County Ordinances and StormWater Design Manual."Signature: ____________________________Printed Name and Title: Jason M. Smith, PE_Date: 11/17/2020_Registration Number: 034070_Property Owner Certification:"I (We) hereby certify that I (we) am (are) the current owner of the property ·and that upon receipt of"Authorization-To-Construct" any clearing, grading, construction or development, will be performed in accordance with this planand that the applicable ordinances and rules of New Hanover County, the State of North Carolina and the Federal Governmentand its agencies which are hereby made part of this· plan. As the owner, I (we) accept full responsibility for the construction andoperation and maintenance of the proposed facilities. I (We) will not attempt to transfer of this responsibility without thewritten authorization of New Hanover County."Signature: ____________________________Printed Name and Title: ____________________________Date:____________________________IMPERVIOUS AREA271.37 ACRES (5
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J M Smith Engineering LLC
FAX (678) 267-3731LOCAL (706) 894-2331CORNELIA, GEORGIA
ENGINEERS AND CONSULTANTS
155 CLARKESVILLE STREET
30531 www.jmsmithengineering.com
TEL (678) 267-3690POST OFFICE BOX 331
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Printed:J:\Jobs\274 - Sandbar Architects\2020-274-01 ILM Wilmington\CON DWG\SHEETS\SHEETS2.dwg Nov 19, 2020 - 5:22pm
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Aero Center Wilmington1830, 1834 & 1835 Flightline Road Wilmington, GA 28405 313915.53.7748.000New Hanover County, NC County, NC
11
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Marathon FBO DBA Aero Ctr Wilm.
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GRADING PLAN
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PERMIT SET - VALID WITH APPROVAL STAMP
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Designer 's Plan Certification"I hereby certify that this plan has been prepared in accordance with the latest New Hanover County Ordinances and StormWater Design Manual."Signature: ____________________________Printed Name and Title: Jason M. Smith, PE_Date: 11/17/2020_Registration Number: 034070_Property Owner Certification:"I (We) hereby certify that I (we) am (are) the current owner of the property ·and that upon receipt of"Authorization-To-Construct" any clearing, grading, construction or development, will be performed in accordance with this planand that the applicable ordinances and rules of New Hanover County, the State of North Carolina and the Federal Governmentand its agencies which are hereby made part of this· plan. As the owner, I (we) accept full responsibility for the construction andoperation and maintenance of the proposed facilities. I (We) will not attempt to transfer of this responsibility without thewritten authorization of New Hanover County."Signature: ____________________________Printed Name and Title: ____________________________Date:____________________________
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NARRATIVE:1. Plan preparer:JASON M SMITH, PELevel II Certified Design Professional No. 24922. Total Site acreage: 2.26 acres / total disturbed acreage: 2.3 acres3. Site Earthwork: 75 cut/400 cy fill4. The proposed project, Aero Center Wilmington, occupies a portion of 2.26 acres at 1830, 1834 & 1835 Flightline Road Wilmington, NC in New Hanover County, NCCounty. The site is to be developed for a Airport FBO and hangars. The site will be served by Public Sewer.5. Boundary information from Boundary information as per client. The lease area will be finalized once the design of the site is finalized. Boundary informaiton forcoordination purposes only and should not be considered a boundary survey. J M Smith Engineering Assumes no responsibility for the accuracy of the boundaryinformation as shown.and topographic information from Topographic information as provided by the client from various survey sources. The information has beencompiled into an overall existing conditions. J M Smith Engineering Assumes no responsibility for the accuracy of the boundary information as shown.. J M SmithEngineering LLC does not warrant the accuracy of the information provided from the surveyor.6. No negative impacts to downstream properties are expected as a result of this development. Site is part of an overall hydrology plan for the development and waspreviously developed. The overall hydrology study allows for an overall impervious surface of the leased area to be 65% impervious. The site impervious area is belowthis threshold7. Property Owner information:New Hanover County230 Government Center DriveWilmington, NC 28403910-798-7187contact: EXISTING CONDITIONS1. Site receives 0.0 acres off-site drainage.2. Site DOES contain state waters requiring an undisturbed buffer3. The receiving water(s) is Un-named tributary of the Cape Fear River.4. The property is Grass, paving, and previous a few scattered structures. Most of the structures in this area have been previously demolished. . Care will be taken topreserve as many trees as possible.5. Adjacent conditions: The property is bounded by Airport Property to the north, Airport Property to the east, Airport Property to the south and Airport Property to thewest.6. Predominant soils types on site are Pantego Loam (Pn) with a K factor of 0.28. Soils mapping data from NRCS soils survey of New Hanover County, NC County andtaken from on-line data.7. Critical areas are along the stream buffers.8. This site is located within a special flood hazard area per Firm map no FM 3720312900K dated 8/28/2018.9. Site DOES NOT contain wetlands.10. Site DOES have Lakes or Streams located within 200 feet of property.EROSION AND SEDIMENT CONTROL NOTES:MANAGEMENT STRATEGIES AND SEQUENCES OF EROSION CONTROL MEASURESTHE CONTRACTOR CONSTRUCT ALL EROSION CONTROL MEASURES IN ACCORDANCE WITH THE MINIMUM STANDARDS AND SPECIFICATIONS OF THEAPPLICABLE REGULATIONS OF THE "NC EROSION AND SEDIMENT CONTROL PLANNING AND DESIGN MANUAL AND LOCAL ORDINANCES .THE FOLLOWING SEQUENCE OF EVENTS AND EROSION CONTROL MEASURES SHALL BE INCORPORATED INTO THE CONSTRUCTION SCHEDULE FOR THISPROJECT AND SHALL APPLY TO ALL CONSTRUCTION ACTIVITIES WITHIN THE PROJECT LIMITS:1.A) TEMPORARY CONSTRUCTION ENTRANCEIS) SHALL BE PROVIDED AT THE LOCATION(S) SHOWN ON THE PLANS. THIS ENTRANCE(S) SHALLCONSTRUCTED IN ACCORDANCE WITH THE ABOVE.A) WHERE CONSTRUCTION VEHICLE ACCESS ROUTES INTERSECT PAVED PUBLIC ROADS PROVISIONS SHALL BE MADE TO MINIMIZE THETRANSPORT OF SEDIMENT ONTO THE PAVED SURFACE. WHERE SEDIMENT IS TRANSPORTED ONTO A PUBLIC ROAD SURFACE , THE ROAD SHALL BECLEANED THOROUGHLY AT THE END OF EACH DAY . SEDIMENT SHALL BE REMOVED FROM THE ROAD BY SHOVELING OR SWEEPING ANDTRANSPORTED TO A SEDIMENT CONTROL DISPOSAL AREA. STREET WASHING SHALL BE ALLOWED ONLY AFTER SEDIMENT IS REMOVED IN THISMANNER. THIS PROVISION SHALL APPLY TO INDIVIDUAL SUBDIVISION LOTS AS WELL AS LARGER LAND DISTURBING ACTIVITIES.B)CONSTRUCTION TRAFFIC SHALL BE LIMITED TO ACCESS ROADS ALL TRAFFIC IS PROHIBITED FROM CROSSING DRAINAGE SWALES ANDSTREAMS EXCEPT WHERE ABSOLUTELY NECESSARY.2.DEWATERING AND WELL POINT DISCHARGE OPERATIONS MUST PROVIDE APPROPRIATE EROSION CONTROL DEVICES AND PRACTICES AND BEAPPROVED BY THE APPROPRIATE INSPECTIONS BUREAU PRIOR TO COMMENCEMENT OF DISCHARGE OPERATIONS. FAILURE TO COMPLY MAYRESULT IN A STOP WORK ORDER BEING ISSUED.3.TEMPORARY SEDIMENT TRAP AS SEDIMENT BARRIERS, CONSTRUCTION ENTRANCE.AND EROSION CONTROL STONE ARE TO BE PLACED PRIOR TOCLEARING AND GRUBBING PRIOR TO THE FIRST PHASE OF CONSTRUCTION.4.ALL PERMANENT STORM WATER MANAGEMENT FACILITIES INCLUDING EROSION CONTROL ARE TO BE INSTALLED AND MADE OPERATIONAL AT THESTART OF CLEARING OPERATIONS INCLUDING APPROVED SEDIMENT BASINS.5.THE CONTRACTOR SHALL COMPLETE DRAINAGE FACILITIES WITHIN THIRTY (30) DAYS FOLLOWING COMPLETION OF ROUGH GRADING AT ANY POINTWITHIN THE PROJECT.6.CONSTRUCTION WILL BE SEQUENCED SO THAT GRADING OPERATIONS CAN BEGIN AND END AS QUICKLY AS POSSIBLE.7.AREAS WHICH ARE NOT TO BE DISTURBED WILL BE CLEARLY MARKED BY FENCING. FLAGS SIGNS. ETC.A)PERMANENT OR TEMPORARY SOIL STABILIZATION SHALL BE APPLIED TO DENUDED AREAS WITHIN SEVEN (7) DAYS AFTER FINAL GRADE ISREACHED ON ANY PORTION OF THE SITE TEMPORARY SOIL STABILIZATION SHALL BE APPLIED WITHIN SEVEN (7) DAYS TO DENUDED AREAS THATMAY NOT BE AT FINAL GRADE BUT WILL REMAIN DORMANT (UNDISTURBED) FOR LONGER THAN THIRTY (30) DAYS. PERMANENT STABILIZATION SHALLBE APPLIED TO AREAS THAT ARE TO BE LEFT DORMANT FOR MORE THAN ONE (1) YEAR.B)DURING CONSTRUCTION OF PROJECT SOIL STOCKPILES SHALL BE STABILIZED OR PROTECTED WITH SEDIMENT TRAPPING MEASURES. THEAPPLICANT IS RESPONSIBLE FOR THE TEMPORARY PROTECTION AND PERMANENT STABILIZATION OF ALL SOIL STOCKPILES ON SITE AS WELL ASSOIL INTENTIONALLY TRANSPORTED FROM THE PROJECT SITE.C)A PERMANENT VEGETATIVE COVER SHALL BE ESTABLISHED ON DENUDED AREAS NOT OTHERWISE PERMANENTLY STABILIZED. PERMANENTVEGETATION SHALL NOT BE CONSIDERED ESTABLISHED UNTIL A GROUND COVER IS ACHIEVED THAT, IN THE OPINION OF THE LOCAL PROGRAMADMINISTRATOR OR HIS DESIGNATED AGENT IS UNIFORM MATURE ENOUGH TO SURVIVE AND WILL INHIBIT EROSION.VEGETAL COVER SHALL BE ESTABLISHED AS FOLLOWS:SEEDPER VOLUME III OF THE PFMTOPSOIL4"THICK PER V.D.O.T. SPEC. 602)CLASS B)LIME4000#/ACFERTILIZER1000#/AC OF 10-10-10MULCH2000#/AC(HYDROSEEDING MAY BE USED IN PLACE OF MULCHING ON AREA OTHER THAN DITCH BANKS). STABILIZATION MEASURES SHALL BE APPLIED TO EARTHENSTRUCTURES SUCH AS DAMS, DIVERSIONS. AND DITCH OR WATERCOURSE BEDS AND BANKS IMMEDIATELY AFTER INSTALLATION.9.A) ALL STORM SEWER INLETS THAT ARE MADE OPERABLE DURING CONSTRUCTION SHALL BE PROTECTED SO THAT SEDIMENT LADEN WATERCANNOT ENTER THE CONVEYANCE SYSTEM WITHOUT FIRST BEING FILTERED OR OTHERWISE TREATED TO REMOVE SEDIMENT.B)BEFORE NEWLY CONSTRUCTED CONVEYANCE CHANNELS ARE MADE OPERATIONAL. ADEQUATE OUTLET PROTECTION AND ANY REQUIREDTEMPORARY OR PERMANENT CHANNEL LINING SHALL BE INSTALLED IN BOTH THE CONVEYANCE CHANNEL AND RECEIVING CHANNEL.10.A) CUT AND FILL SLOPES SHALL BE DESIGNED AND CONSTRUCTED IN A MANNER THAT WILL MINIMIZE EROSION. SLOPES THAT ARE FOUND TO BEERODING EXCESSIVELY WITHIN ONE (1) YEAR OF PERMANENT STABILIZATION SHALL BE PROVIDED WITH ADDITIONAL SLOPE STABILIZING MEASURESUNTIL THE PROBLEM IS CORRECTED.B)CONCENTRATED RUNOFF SHALL NOT FLOW DOWN CUT OR FILL SLOPES UNLESS CONTAINED WITHIN AN ADEQUATE TEMPORARY ORPERMANENT CHANNEL. FLUME.OR SLOPE DRAIN STRUCTURE.11.PERIODIC INSPECTIONS AND REQUIRED MAINTENANCE MUST BE PROVIDED ESPECIALLY AFTER EACH SIGNIFICANT STORM. THE PROJECTSUPERINTENDENT SHALL BE RESPONSIBLE FOR THE INSTALLATION AND MAINTENANCE OF ALL EROSION & SEDIMENT CONTROL PRACTICES.12.THE CONTRACTOR SHALL MONITOR AND TAKE PRECAUTIONS TO CONTROL DUST INCLUDING (BUTNOT LIMITED TO) USE OF WATER OR CHEMICAL DUST PALLIATIVE8/10/15 REVISED PER FORSYTH COUNTY COMMENTS
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J M Smith Engineering LLC
FAX (678) 267-3731LOCAL (706) 894-2331CORNELIA, GEORGIA
ENGINEERS AND CONSULTANTS
155 CLARKESVILLE STREET
30531 www.jmsmithengineering.com
TEL (678) 267-3690POST OFFICE BOX 331
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Aero Center Wilmington1830, 1834 & 1835 Flightline Road Wilmington, GA 28405 313915.53.7748.000New Hanover County, NC County, NC
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17
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New Hanover County Soil a
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Section 23-248 Erosion and
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disturb more than one acre
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Conservation District, and fo
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commencement of the prop
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the site has been stabilized. After approvi
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exists, the County will require a revised Pl
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land-disturbing activity or his attorney in f
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registered agents. If the person financially
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land to be disturbed, the draft erosion and
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County Engineering Department. Failure o
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preparation of the revised Plan, work shal
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(h)The County shall approve a Plan upon
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laws, regulations and rules. Approval assu
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(i)The Plan required by this section shall
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from the County, on request. The Plan sha
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t
e
d
p
u
r
s
u
a
n
t
t
o
t
h
i
s
A
r
t
i
c
l
e
.
For purposes of this subsection (j) an appl
i
c
a
n
t
'
s
r
e
c
o
r
d
o
r
t
h
e
p
r
o
p
o
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e
d
t
r
a
n
s
f
e
r
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e
'
s
r
e
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o
r
d
m
a
y
b
e
c
o
n
s
i
d
e
r
e
d
f
o
r
o
n
l
y
t
w
o
(
2
)
y
e
a
r
s
p
r
i
o
r
t
o
t
h
e
a
p
p
l
i
c
a
t
i
o
n
d
a
t
e
.
In the event that an erosion and sediment
a
t
i
o
n
c
o
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t
r
o
l
P
l
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n
o
r
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t
y
p
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s
u
a
n
t
t
o
s
u
b
s
e
c
t
i
o
n
,
(
j
)
o
f
t
h
i
s
s
e
c
t
i
o
n
,
t
h
e
C
o
u
n
t
y
s
h
a
l
l
n
o
t
i
f
y
t
h
e
D
i
r
e
c
t
o
r
o
f
t
h
e
D
i
v
i
s
i
o
n
o
f
E
n
e
r
g
y
,
Mineral, and Land Resources of such disap
p
r
o
v
a
l
w
i
t
h
i
n
1
0
d
a
y
s
o
f
t
h
e
d
i
s
a
p
p
r
o
v
a
l
.
T
h
e
C
o
u
n
t
y
s
h
a
l
l
a
d
v
i
s
e
t
h
e
a
p
p
l
i
c
a
n
t
o
r
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h
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p
r
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p
o
s
e
d
t
r
a
n
s
f
e
r
e
e
a
n
d
t
h
e
D
i
r
e
c
t
o
r
i
n
w
r
i
t
i
n
g
a
s
t
o
t
h
e
s
p
e
c
i
f
i
c
r
e
a
s
o
n
s
t
h
a
t
t
h
e
P
l
a
n
was disapproved. Notwithstanding the pro
v
i
s
i
o
n
s
o
f
S
e
c
t
i
o
n
2
3
-
2
4
9
(
a
)
,
t
h
e
a
p
p
l
i
c
a
n
t
m
a
y
a
p
p
e
a
l
t
h
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l
o
c
a
l
g
o
v
e
r
n
m
e
n
t
'
s
d
i
s
a
p
p
r
o
v
a
l
o
f
t
h
e
P
l
a
n
d
i
r
e
c
t
l
y
t
o
t
h
e
C
o
m
m
i
s
s
i
o
n
.
(k)The County administering an erosion a
n
d
s
e
d
i
m
e
n
t
a
t
i
o
n
c
o
n
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r
o
l
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r
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m
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y
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a
n
d
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d
i
m
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n
t
a
t
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n
c
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r
o
l
P
l
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a
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d
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a
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o
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t
o
f
t
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e
P
l
a
n
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o
l
d
e
r
t
o
a
successor-owner of the property on which
t
h
e
p
e
r
m
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d
a
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v
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r
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r
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l
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c
c
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r
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s
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v
i
d
e
d
i
n
t
h
i
s
s
u
b
s
e
c
t
i
o
n
.
(1)The County may transfer a Plan
i
f
a
l
l
o
f
t
h
e
f
o
l
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o
w
i
n
g
c
o
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d
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s
a
r
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m
e
t
:
(a)The successor-owner of the property s
u
b
m
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i
b
i
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t
y
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n
d
o
w
n
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r
s
h
i
p
.
(b)The County finds all of the following:(1)The plan holder is one of the fo
l
l
o
w
i
n
g
:
(i
)
A
n
a
t
u
r
a
l
p
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r
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o
n
w
h
o
i
s
d
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e
a
s
e
d
.
(i
i
)
A
p
a
r
t
n
e
r
s
h
i
p
,
l
i
m
i
t
e
d
l
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a
b
i
l
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o
r
p
o
r
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t
i
o
n
,
c
o
r
p
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r
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o
n
,
o
r
a
n
y
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t
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r
b
u
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a
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c
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l
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.
(i
i
i
)
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p
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r
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o
n
w
h
o
h
a
s
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n
l
a
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f
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n
d
f
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d
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n
w
h
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c
h
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d
a
c
t
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v
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s
o
c
c
u
r
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n
g
o
r
w
i
l
l
o
c
c
u
r
.
(i
v
)
A
p
e
r
s
o
n
w
h
o
h
a
s
s
o
l
d
t
h
e
p
r
o
p
e
r
t
y
o
n
w
h
i
c
h
t
h
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p
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m
i
t
t
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d
a
c
t
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v
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s
o
c
c
u
r
r
i
n
g
o
r
w
i
l
l
o
c
c
u
r
.
(2
)
T
h
e
P
l
a
n
h
o
l
d
e
r
s
h
a
l
l
c
o
m
p
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a
n
d
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n
u
n
t
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c
h
t
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t
h
e
P
l
a
n
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s
t
r
a
n
s
f
e
r
r
e
d
.
-1
9
-
(3
)
T
h
e
s
u
c
c
e
s
s
o
r
-
o
w
n
e
r
s
h
a
l
l
c
o
m
p
l
y
w
i
t
h
a
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a
n
d
c
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d
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t
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f
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l
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p
l
a
n
h
a
s
b
e
e
n
t
r
a
n
s
f
e
r
r
e
d
.
(4
)
N
o
t
w
i
t
h
s
t
a
n
d
i
n
g
c
h
a
n
g
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s
t
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a
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a
f
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r
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g
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n
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u
a
n
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f
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P
l
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th
e
C
o
u
n
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y
m
a
y
n
o
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n
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w
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d
c
o
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d
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l
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n
w
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t
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p
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t
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f
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s
u
c
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e
s
s
o
r
-
o
w
n
e
r
.
N
o
t
h
i
n
g
i
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t
h
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s
u
b
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c
t
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h
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t
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n
t
y
f
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r
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q
u
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v
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d
p
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n
p
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r
s
u
a
n
t
t
o
G
.
S
.
1
1
3
A
-
5
4
.
1
(
b
)
.
(l
)
N
o
p
e
r
s
o
n
m
a
y
i
n
i
t
i
a
t
e
a
l
a
n
d
-
d
i
s
t
u
r
b
i
n
g
a
c
t
i
v
i
t
y
b
e
f
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r
e
n
o
t
i
f
y
i
n
g
t
h
e
a
g
e
n
c
y
t
h
a
t
i
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s
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e
d
t
h
e
P
l
a
n
a
p
p
r
o
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d
a
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a
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d
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d
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s
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r
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i
n
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a
c
t
i
v
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t
y
w
i
l
l
b
e
g
i
n
.
P
r
e
c
o
n
s
t
r
u
c
t
i
o
n
m
e
e
t
i
n
g
s
a
r
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o
p
t
i
o
n
a
l
.
(m
)
A
p
p
l
i
c
a
t
i
o
n
s
f
o
r
a
m
e
n
d
m
e
n
t
o
f
a
n
e
r
o
s
i
o
n
c
o
n
t
r
o
l
P
l
a
n
i
n
w
r
i
t
t
e
n
a
n
d
/
o
r
g
r
a
p
h
i
c
f
o
r
m
m
a
y
b
e
m
a
d
e
a
t
a
n
y
t
i
m
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u
n
d
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r
t
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s
a
m
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o
n
d
i
t
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a
s
t
h
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o
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g
i
n
a
l
a
p
p
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c
a
t
i
o
n
.
U
n
t
i
l
s
u
c
h
t
i
m
e
a
s
s
a
i
d
a
m
e
n
d
m
e
n
t
i
s
ap
p
r
o
v
e
d
b
y
t
h
e
C
o
u
n
t
y
,
t
h
e
l
a
n
d
-
d
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s
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u
r
b
i
n
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a
c
t
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v
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h
a
l
l
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t
p
r
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c
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c
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t
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a
c
c
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d
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n
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e
w
i
t
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t
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r
o
s
i
o
n
c
o
n
t
r
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l
P
l
a
n
a
s
o
r
i
g
i
n
a
l
l
y
a
p
p
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o
v
e
d
.
(n
)
A
n
y
p
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r
s
o
n
e
n
g
a
g
e
d
i
n
l
a
n
d
-
d
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s
t
u
r
b
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n
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a
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t
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v
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w
h
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f
a
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f
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a
P
l
a
n
i
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a
c
c
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r
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a
n
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w
i
t
h
t
h
e
O
r
d
i
n
a
n
c
e
o
r
w
h
o
c
o
n
d
u
c
t
s
a
l
a
n
d
d
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t
u
r
b
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a
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t
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v
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p
t
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n
a
c
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d
a
n
c
e
w
i
t
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p
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v
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f
a
n
a
p
p
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d
P
l
a
n
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h
a
l
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b
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de
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m
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d
i
n
v
i
o
l
a
t
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n
o
f
t
h
i
s
O
r
d
i
n
a
n
c
e
.
(o
)
T
h
e
l
a
n
d
o
w
n
e
r
,
t
h
e
f
i
n
a
n
c
i
a
l
l
y
r
e
s
p
o
n
s
i
b
l
e
p
a
r
t
y
,
o
r
t
h
e
l
a
n
d
o
w
n
e
r
'
s
o
r
t
h
e
f
i
n
a
n
c
i
a
l
l
y
re
s
p
o
n
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i
b
l
e
p
a
r
t
y
'
s
a
g
e
n
t
s
h
a
l
l
p
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r
f
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r
m
a
n
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p
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t
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f
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a
r
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a
c
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d
b
y
t
h
e
P
l
a
n
a
f
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r
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a
c
h
p
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a
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o
f
t
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l
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a
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b
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n
c
o
m
p
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d
a
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d
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t
a
b
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m
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r
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r
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a
c
c
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r
d
a
n
c
e
w
i
t
h
G
.
S
.
11
3
A
-
5
7
(
2
)
.
T
h
e
p
e
r
s
o
n
w
h
o
p
e
r
f
o
r
m
s
t
h
e
i
n
s
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FAX (678) 267-3731LOCAL (706) 894-2331CORNELIA, GEORGIA
ENGINEERS AND CONSULTANTS
155 CLARKESVILLE STREET
30531 www.jmsmithengineering.com
TEL (678) 267-3690POST OFFICE BOX 331
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Aero Center Wilmington1830, 1834 & 1835 Flightline Road Wilmington, NC 28405 313915.53.7748.000New Hanover County, NC County, NC
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Designer 's Plan Certification"I hereby certify that this plan has been prepared in accordance with the latest New Hanover County Ordinances and StormWater Design Manual."Signature: ____________________________Printed Name and Title: Jason M. Smith, PE_Date: 11/17/2020_Registration Number: 034070_Property Owner Certification:"I (We) hereby certify that I (we) am (are) the current owner of the property ·and that upon receipt of"Authorization-To-Construct" any clearing, grading, construction or development, will be performed in accordance with this planand that the applicable ordinances and rules of New Hanover County, the State of North Carolina and the Federal Governmentand its agencies which are hereby made part of this· plan. As the owner, I (we) accept full responsibility for the construction andoperation and maintenance of the proposed facilities. I (We) will not attempt to transfer of this responsibility without thewritten authorization of New Hanover County."Signature: ____________________________Printed Name and Title: ____________________________Date:____________________________
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Construction SequenceItems must occur in the order listed; items cannot occur concurrently unless specifically noted.1.Receive Stormwater permit from Wilmington2.Receive Land Disturbance permit from Local Issuing Authority3.Receive NPDES coverage from NCDEQ4.Pre-construction meeting5.Notify NHC issuing authority 48 hours prior to beginning land-disturbing activities6.Notify regulatory agencies prior to beginning land-disturbing activities7.Installation of construction entrance(s)8.Clearing & grubbing only as necessary for installation of perimeter controls9.Installation of perimeter controls (e.g., silt fence)10.Clearing & grubbing only in areas of basins/ traps/ ponds11.Installation and stabilization of basins/ traps/ ponds and installation of diversions to those
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the structures and diversions to the structures are completely installed)12.Clearing & grubbing of site or demolition (sediment & erosion control measures for these
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FAX (678) 267-3731LOCAL (706) 894-2331CORNELIA, GEORGIA
ENGINEERS AND CONSULTANTS
155 CLARKESVILLE STREET
30531 www.jmsmithengineering.com
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FAX (678) 267-3731LOCAL (706) 894-2331CORNELIA, GEORGIA
ENGINEERS AND CONSULTANTS
155 CLARKESVILLE STREET
30531 www.jmsmithengineering.com
TEL (678) 267-3690POST OFFICE BOX 331
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FAX (678) 267-3731LOCAL (706) 894-2331CORNELIA, GEORGIA
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155 CLARKESVILLE STREET
30531 www.jmsmithengineering.com
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Aero Center Wilmington1830, 1834 & 1835 Flightline Road Wilmington, GA 28405 313915.53.7748.000New Hanover County, NC County, NC
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excavated drop inlet protection (temporary)Definition An excavated area in the approach to a storm drain drop inlet or curb inlet.Purpose To trap sediment at the approach to the storm drainage systems. This practiceallows use of permanent stormwater conveyance at an early stage of sitedevelopment.Conditions WherePractice Applies Where storm drain drop inlets are to be made operational before permanentstabilization of the disturbed drainage area. This method of inlet protection isapplicable where relatively heavy flows are expected, and overflow capabilityis needed (Figure 6.50a). Frequent maintenance is required and temporaryflooding in the excavated area will occur. This practice can be used incombination with other temporary inlet protection devices such as Practice6.51, Hardware Cloth, and Gravel Inlet Protection and Practice 6.52, Blockand Gravel Inlet Protection.Design Criteria Limit the drainage area to 1 acre. Keep the minimum depth at 1 foot and themaximum depth of 2 feet as measured from the crest of the inlet structure.Maintain side slopes around the excavation no steeper than 2:1Keep the minimum volume of excavated area around the drop inlet atapproximately 1800 ft3/acre disturbed.Shape the basin to fit site conditions, with the longest dimension orientedtoward the longest inflow area to provide maximum trap efficiency.Install provisions for draining the temporary pool to improve trappingefficiency for small storms and to avoid problems from standing water afterheavy rains.ConstructionSpecifications1. Clear the area of all debris that might hinder excavation and disposal ofspoil.2. Grade the approach to the inlet uniformly.3. Protect weep holes by gravel.4. When the contributing drainage area has been permanently stabilized, sealweep holes, fill the basin with stable soil to final grading elevations, compactit properly, and stabilize.Maintenance Inspect, clean, and properly maintain the excavated basin after every stormuntil the contributing drainage area has been permanently stabilized. Toprovide satisfactory basin efficiency, remove sediment when the volume ofthe basin has been reduced by one-half. Spread all excavated material evenlyover the surrounding land area or stockpile and stabilize it appropriately.6.51HardWare clotH & Gravel inlet protect
i
o
n
Definition A temporary measure of wire-mesh hardware cloth aroun
d
s
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l
p
o
s
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supporting washed stone placed around the opening
o
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.
Purpose To prevent sediment from entering yard inlets, grated stor
m
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o
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inlets during construction. This practice allows earl
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t
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t
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a
i
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system.Conditions WherePractice Applies To be placed around a catch basin or a drop inlet an
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moderate. If heavy flow is anticipated, use the rock
d
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u
t
i
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t
p
r
o
t
e
c
t
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method (Practice 6.54, Rock Doughnut Inlet Protec
t
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n
)
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storm drain inlets are to be made operational before
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of the disturbed drainage area. This method of inlet
p
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o
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e
f
f
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c
t
i
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e
where the inlet is expected to drain shallow sheet fl
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w
.
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e
i
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d
i
a
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n
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area around the inlet should be relatively flat (less t
h
a
n
1
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e
r
c
e
n
t
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a
n
d
l
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a
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so that accumulated sediment can be easily remove
d
.
This practice must not be used near the edge of f
i
l
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a
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r
i
a
l
a
n
d
m
u
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n
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divert water over cut or fill slopes.Design Criteria Ensure that drainage areas do not exceed 1 acre per inlet.For securing the wire mesh hardware cloth barriers
,
u
s
e
s
t
e
e
l
T
p
o
s
t
s
.
T
h
e
p
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s
t
s
need to be 1.25 lb/linear ft steel with a minimum le
n
g
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f
5
f
e
e
t
.
M
a
k
e
s
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e
the posts have projections to facilitate fastening the
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a
r
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c
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.
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drive each stake into the ground to a minimum dept
h
o
f
2
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e
t
.
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e
m
a
x
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spacing for the posts is 4 feet.The wire mesh should be at least a 19-gauge hardw
a
r
e
c
l
o
t
h
w
i
t
h
a
¼
i
n
c
h
mesh opening. The total height should be a minimu
m
o
f
2
f
e
e
t
.
P
r
o
v
i
d
i
n
g
a
flap of hardware cloth on the ground projecting awa
y
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m
t
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e
i
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l
e
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c
a
n
a
i
d
i
n
removal of the stone at the project’s completion. Th
e
s
e
d
i
m
e
n
t
c
o
n
t
r
o
l
s
t
o
n
e
,
with a height of 16 inches, should have a outside sl
o
p
e
o
f
2
:
1
.
The top elevation of the structure must be at least 1
2
i
n
c
h
e
s
l
o
w
e
r
t
h
a
n
t
h
e
ground elevation downslope from the inlet. It is imp
o
r
t
a
n
t
t
h
a
t
a
l
l
s
t
o
r
m
flows pass over the structure into the storm drain an
d
n
o
t
b
y
p
a
s
s
t
h
e
s
t
r
u
c
t
u
r
e
.
Temporary dikes below the structure may be necess
a
r
y
t
o
p
r
e
v
e
n
t
b
y
p
a
s
s
f
l
o
w
.
Soil excavated when constructing the sediment poo
l
m
a
y
b
e
u
s
e
d
f
o
r
t
h
i
s
purpose (Figure 6.51a).
6.
5
1
.
1
4’ max3’NCDOT #5 or #57washed stone
16
”
2’
2’
NCDOT #5 or #57washed stone filteredwaterFigure 6.51a Hardware cloth and gravel inlet protectionConstructionSpecifications1. Uniformly grade a shallow depression a
p
p
r
o
a
c
h
i
n
g
t
h
e
i
n
l
e
t
.
2. Drive 5-foot steel posts 2 feet into the g
r
o
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n
d
s
u
r
r
o
u
n
d
i
n
g
t
h
e
i
n
l
e
t
.
Space posts evenly around the perimeter o
f
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e
i
n
l
e
t
,
a
m
a
x
i
m
u
m
o
f
4
f
e
e
t
apart.3. Surround the posts with wire mesh hard
w
a
r
e
c
l
o
t
h
.
S
e
c
u
r
e
t
h
e
w
i
r
e
mesh to the steel posts at the top, middle,
a
n
d
b
o
t
t
o
m
.
P
l
a
c
i
n
g
a
2
-
f
o
o
t
f
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a
p
of the wire mesh under the gravel for anch
o
r
i
n
g
i
s
r
e
c
o
m
m
e
n
d
e
d
.
4. Place clean gravel (NC DOT #5 or #57
s
t
o
n
e
)
o
n
a
2
:
1
s
l
o
p
e
w
i
t
h
a
height of 16 inches around the wire, and s
m
o
o
t
h
t
o
a
n
e
v
e
n
g
r
a
d
e
.
5. Once the contributing drainage area has
b
e
e
n
s
t
a
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6.53sod drop inlet protectionDefinition A permanent grass sod filter area around a storm drain drop inlet in a stabilized,well-vegetated area.Purpose To limit sediment from entering storm drainage systems as a permanentprotection measure.Conditions WherePractice Applies Where the drainage area of the drop inlet has been permanently seeded andmulched, and the immediate surrounding area is to remain in dense vegetation.This practice is well suited for lawns adjacent to large buildings.Design Criteria Keep velocity of design flow over the sod area at all points less than 5 ft/sec.Place sod to form a turf mat completely covering the soil surface for a minimumdistance of 4 feet from each side of the drop inlet where runoff will enter.Maintain the slope of the sodded area no greater than 4:1.Keep the drainage area no greater than 2 acres; maintain this area undisturbedor stabilize it.ConstructionSpecifications1. Bring the area to be sodded to final grade elevation with top soil. Addfertilizer and lime, and install sod according to Practice 6.12, Sodding.2. Lay all sod strips perpendicular to the direction of flows.3. Keep the width of the sod at least 4 ft in the direction of flows.4. Stagger sod strips so that adjacent strip ends are not aligned.Maintenance During the first 4 weeks, water sod as often as necessary to maintain moist soilto a minimum depth of 2 inches.Maintain grass height at least 2 inches with no more than one-third the shootheight (grass leaf) removed in any mowing.Apply fertilizer as necessary to maintain the desired growth and sod density.Add lime as needed to maintain the proper pH.Figure 6.53b Sod drop inlet sediment filter (source: Va SWCC)
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J M Smith Engineering LLC
FAX (678) 267-3731LOCAL (706) 894-2331CORNELIA, GEORGIA
ENGINEERS AND CONSULTANTS
155 CLARKESVILLE STREET
30531 www.jmsmithengineering.com
TEL (678) 267-3690POST OFFICE BOX 331
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Aero Center Wilmington1830, 1834 & 1835 Flightline Road Wilmington, NC 28405 313915.53.7748.000New Hanover County, NC County, NC
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PERMIT SET - VALID WITH APPROVAL STAMP
6.87CHECK DAM WITH A WEIRA small stone dam structure with a weir outlet with a sediment storage area onthe upper side.To reduce erosion in a drainage channel by restricting the velocity of flow.This structure also has some ability to provide sediment control.This temporary practice may be used in the following locations:• At outlets of temporary diversions, graded channels, and temporary slopedrains;• In small natural drainage turnouts; and• In locations where the dams can be easily cleaned and maintained on aregular basis.Do not use a check dam with a weir in intermittent or perennial streams.Check dams are an expedient way to reduce gullying in the bottom of channelsthat will be filled or stabilized at a later date. The dams should only be usedwhile permanent stabilization measures are being put into place.Check dams installed in grass-lined channels may kill the vegetative lining ifsubmergence after it rains is too long and/or sedimentation is excessive. Allstone and riprap must be removed if mowing is planned as part of vegetativemaintenance.The following criteria should be used when designing a check dam with aweir:• Keep the weir at least 9 inches lower than the outer edges at naturalground elevation. The weir length is variable to the size of the drainagearea and peak runoff. The weir length may be sized as: L (ft) =Q peak (csf)0.88• Keep the side slope of the stone at 2:1 or flatter.• The apron length (lower side of dam) should be approximately three timesthe height of the dam with a minimum length of 4 feet. Stabilize outflowareas along the channel to resist erosion.• The maximum spacing between dams places the toe of the upstream damat the same elevation as the top of the downstream dam (Figure 6.84a).• Use NC DOT Class B stone and line the upstream side of the dam withNC DOT #5 or #57 stone.• Key the stone into the ditch banks and extend it beyond the abutments aminimum of 1.5 feet to avoid washouts from overflow around the dams.• Sediment storage area should be sized for the anticipated volume ofsedimentation.1. Place structural stone (Class B) to the lines and dimensions shown onthe plan on a filter fabric foundation. The crest width of the dam should be aminimum of 2 feet.2. Keep the center stone section at least 9 inches below the end where thedam abuts the channel banks.3. Place sediment control stone (#5 or #57) on the upstream side of the damthat is a minimum of 1 foot thick.4. Provide an apron that is 3 times the height of the dam. The apron widthis at least 4 feet long. Undercut the apron so that the top of the apron is flushwith the surrounding grade.5. Extend the stone at least 1.5 feet beyond the ditch bank to keep water fromcutting around the ends of the check dam.6. Excavate sediment storage area to the dimensions shown on the planInspect check dams and channels at least weekly and after each significant (1/2inch or greater) rainfall event and repair immediately. Clean out sediment,straw, limbs, or other debris that could clog the channel when needed.Anticipate submergence and deposition above the check dam and erosion fromhigh flows around the edges of the dam. Correct all damage immediately. Ifsignificant erosion occurs between dams, additional measures can be takensuch as, installing a protective riprap liner in that portion of the channel(Practice 6.31, Riprap-line and Paved Channels).Remove sediment accumulated behind the dams as needed to prevent damageto channel vegetation, allow the channel to drain through the stone check dam,and prevent large flows from carrying sediment over the dam. Add stones todams as needed to maintain design height and cross section.Runoff Conveyance Measures6.31, Riprap-lined and Paved ChannelsNorth Carolina Department of TransportationStandard Specifications for Roads and Structures DefinitionPurposeConditions WherePractice AppliesPlanning ConsiderationsDesign CriteriaConstructionSpecificationsMaintenanceReferences
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SSSSSSSS
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MFP 1PROPOSED HANGAR1834 FLIGHTLINE RD(FLOOR SLOPES - SEE ARCH)EXISTING 54
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PROPOSED UNDERGROIUNDPOWER REROUTEFOR LIGHTING
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C=0.65Tc=5.70 min
<none>
A=0.40
C=0.65Tc=4.98 min
DI - B3.4A=0.16C=0.65Tc=4.98 min DI - B3.5A=0.35C=0.65Tc=7.50 min
Existing DI-F2
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C=0.65Tc=24.72 min
NEW DI - F2.1
.
1
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NEW DI - F3.1
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Existing DI - F
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<none>A=0.54C=0.65Tc=5.52 min
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8/10/15 REVISED PER FORSYTH COUNTY COMMENTSB
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J M Smith Engineering LLC
FAX (678) 267-3731LOCAL (706) 894-2331CORNELIA, GEORGIA
ENGINEERS AND CONSULTANTS
155 CLARKESVILLE STREET
30531 www.jmsmithengineering.com
TEL (678) 267-3690POST OFFICE BOX 331
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Aero Center Wilmington1830, 1834 & 1835 Flightline Road Wilmington, NC 28405 313915.53.7748.000New Hanover County, NC County, NC
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J M Smith Engineering LLC
FAX (678) 267-3731LOCAL (706) 894-2331CORNELIA, GEORGIA
ENGINEERS AND CONSULTANTS
155 CLARKESVILLE STREET
30531 www.jmsmithengineering.com
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