SW3220301_Plansheet - Grading_Drainage Plan_20220420

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PIN: 09054040A
CHILDREN OF TODAY CHILD
#EVELOPMENT CENTER, INC.
DB. 6747, PG. 31
PC. M, FILE 699
20'x 26(52OsO SAND FILTER
WITH 6" PVC UNDER DRAIN SYSTEM
TOP OF WASHED STONE EL - 557.80
TOP OF SAND EL-557.63
MIN. SAND AREA = 520 SF
MIN. SAND DEPTH = 18" (1.5')
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CONCRETE OUTLET STRUCTURE
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KAYLEIGH RIVENS
DB. 7701, PG. 23
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NORMA MATTHEWS WORD
DB. 6143, PG. 31
BUILDING PAD / ROOF PITCH NOTES
i
!Proposed building slabs to be constructed on a 17. longitudinal
slope in order to utilize Trachte building system.
Roof pitch of exterior buildings to sloped inward toward interior
of site in order to direct all impervious runoff toward the
,[proposed Skimmer Basin/SCM.
NOTE:
PROPERTY BOUNDARY AND ■FIELD TOPO DATA PROVIDED BY
LAWRENCE ASSOCIATES, 106 W. JEFFERSON ST.,
MONROE, NC 28112, 70(-289-1013, www.lawrencesurveying.com
us
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JOY STATE PX_ - M41O02 699)
SCM MAINTENANCE
EASEMENT (SCALE 111=100')
STREAM CLASSIFICATION
Re eiving Stream Rays Fork
•aim ST*
River Ba i Yadkin Pee —Dee
NOTE:
NO JURISDICTIONAL FEATURES IDENTIFIED WITHIN PROPOSED PROJECT AREA AS
1ETERMINED BY FIELD STUDY PERFORMED BY LARRY THOMPSON, SOIL SCIENTIST,
THOMPSON ENVIRONMENTAL CONSULTING, P.O. BOX 541, MIDLAND NC.
STORMWATER NARRATIVE
Mini —Storage USA is a proposed mini —warehouse project located
off Hwy 74 in Wingate NC (Union County). The site is in the
Yadkin Pee —Dee River Basin and drains to Rays Fork Creek. Th e
site is in the To of Wingate Zoning District. Stormwater is
regulated by NCDEQ.
A an Filter SCM is proposed to provide the required water
quality treatment and water quantity runoff controls as required
by NCDEQ & Town of Wingate.
It is anticipated that the mini —warehouse units will be
constructed in 3 phases. The development is proposed as "high
density". The SCM is designed to treat and control a built upon
ar1.305) acres at ultimate built out.
CONTROLLED AREA
RUNOFF ANALYSIS
Controlled
Post Developed'
Design
Pre—Devel.
_Tot'ai1__7T_'_
Peak
I Discharge
Runoff
Peak Flow
11 Elevation
0.02 cf
4.53 cf:)
559.76
cfs
112.22 cfs
12.09 s
I
Ref, HydroCad Analysis
SKIMMER BASIN CONVERSION & SCM CONSTRUCTION SEQUENCE
1 . Upon completion of Phase 3 site grading, construction, and stabilization of upstream
disturbance notify NCDEQ Land Quality for review and approval prior to beginning
conversion of the skimmer basin to Sand Filter SCM.
2Upon approval, floating skimmer to be modified to allow skimmer basin to fully drah
Skimmer to be removed and outlet structure orifice to be protected with temporary slit fence
prior to sediment removal.
3. Sediment to be removed from basin and properly disposed,
4, Subgrade of SCM to be constructed to grades, specifications, and details shown on I
approved plans,
5. Sand chamber to be constructed in accordance with SAND FILTER AND UNDERDRAIN
CONSTRUCTION (Sheet 5).
6. Upon completion of sand chamber construction, disturbed sediment chamber area to be
stabilized with SOD per plan specifications. External embankment and other areas not
draining to sediment chamber to be stabilized in accordance with seeding specifications,
7Temporary silt fence around sand filter chamber can be removed and r1prap berm installed
once SOD has begun to root,
8, Follow Erosion Control Construction Sequence (Sht 6) for maintenance and removal of
remaining site construction erosion control measures.
ism
LEGEND
R/W
= Right—of—way
Utility Pole
RCP
® Reinforced Concrete Pipe
A ®°
= Riprap Outlet Apron
_816—
= Existing Grade Contour
_818—
= Proposed Finished Contour
PD*
Permanent Diversion
NUTINAMArmfil I M1, X4 THET ky, EAW MOL
Storage USA, Inc.
i4724 Old Monroe— Marsh ville Road
'Marshville, NC 28103
iContact: Danny Jordan
;'704-361-3619, [e-mail]
GRAPHIC SCALE
0 3069
IN FEET
1 inch = 3o f t.
W61114) MORO 11211111112-11201111111 Z 101
VA0,11 a, VC9=01101
MB 11: Ma.
eMb V111 1:11,111111111M AT &I, S1
ON\\\
NO
fill
4
16101 Silver Road
Oakbom, NC28129
980-621-0935
kovin@,koWnhol#ngqqgineefing.coii�,
DATE- 12/15/2021
HORIZ. SCALE 1" 30-1
VERT. SCALE NIA
DRArr
WN BY. keh