SW5200201_Plan (BUA)_20200413

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N34°28'18"E 642.01'S55°15'33"E300.41'XFMR
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N55°15'33"W297.39'N34°45'04"E 642.00'N55°15'33"W629.49'N34°45'04"E 679.08'
S34°43'27"W 1237.44'WWSAN SAN SAN SAN SAN SAN
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N34°28'18"E 642.01'S55°15'33"E300.41'XFMR
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X XX X X
X X X
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N55°15'33"W297.39'N34°45'04"E 642.00'N55°15'33"W629.49'N34°45'04"E 679.08'
S34°43'27"W 1237.44'XXXXXX
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TOTAL PROJECT AREA:
EXISTING IMPERVIOUS AREA:
EXISTING IMPERVIOUS PERCENTAGE:
PROPOSED IMPERVIOUS AREA:
PROPOSED IMPERVIOUS PERCENTAGE:
TOTAL NEW IMPERVIOUS AREA:
RIVER BASIN:
WATERSHED:
LOCATED IN JOHNSTON COUNTY ESA?
612,800 SF
38,429 SF
6.27%
53,789 SF
8.77%
15,360 SF
NEUSE
UT OF HANNAH CREEK
NO
(1)
Type of Land Cover
(2)
Area (acres)
(3)
TN Export Coeff.
(lbs/ac/yr)
(4)
TN export from
use (lbs/yr)
Permanently protected
undisturbed open space
(forest, un-mown meadow,
etc.)
Permanently protected
managed open space
(lawn, grass, landscaping,
etc.)
Impervious surfaces
(roads, parking lots,
driveways, roofs, paved or
graveled storage areas, etc.)
TOTALS
559,011 SF
(12.833 AC.)
53,789 SF
(1.23 AC.)
612,800 SF
(14.068 AC.)
1.2
0.6
21.2
15.40
26.08
41.48
TOTAL NITROGEN EXPORT:41.48 lbs/yr / 14.068 ac. = 2.95 lbs/ac/yr
SINCE TOTAL NITROGEN EXPORT IS LESS THAN 3.6 LBS/AC/YR, WE CONCLUDE NO
STORMWATER TREATMENT IS REQUIRED.NSCALE IN FEET
60'120'30'60'
SCALE: 1 IN = 60 FT
SCALE IN FEET
HORIZONTAL
0
THESE PLANS AND ASSOCIATED DOCUMENTS ARE THE EXCLUSIVE PROPERTY OF SHIPMAN ENGINEERING, PLLC AND MAY NOT BE REPRODUCED IN WHOLE OR IN PART. THESE DOCUMENTS SHALL NOT BE USED FOR ANY PURPOSEWHATSOEVER, INCLUDING, BUT NOT LIMITED TO, CONSTRUCTION, BIDDING, AND/OR CONSTRUCTION STAKING WITHOUT THE EXPRESS WRITTEN CONSENT OF SHIPMAN ENGINEERING, PLLC.REVISIONSSYMBOLDATE137 MIDDLEGREEN PLACEHOLLY SPRINGS, NC 27540NCBELS LICENSE P-1963DESIGNED BY:WZS
DRAWN BY:WZS
CHECKED BY:WZS
DRAWING DATE:
SE PROJECT #:LEE STREET ATHLETICCOMPLEX IMPROVEMENTSTOWN OF BENSONJOHNSTON COUNTY, NORTH CAROLINASHEET NUMBER:
2019-017SHIPMANENGINEERING 919.900.0006SHIPMAN ENGINEERING, PLLC07-11-19103-12-2020PER NCDEQ EROSION CONTROL COMMENTS204-7-2020PER DWQ STORMWATER COMMENTSC-16 SITE IMPERVIOUS AREA ANALYSISALL CONSTRUCTION SHALL BE IN ACCORDANCE WITH TOWN
OF BENSON STANDARDS AND SPECIFICATIONS.
PRE-DEVELOPMENT IMPERVIOUS AREA
SCALE: 1" = 60'
POST-DEVELOPMENT IMPERVIOUS AREA
SCALE: 1" = 60'
MARKET STREET
ELM STREET
LEE STREETMANN STREETPROJECT BOUNDARY
PROJECT BOUNDARY
PRE-DEVELOPMENT
IMPERVIOUS AREA
MARKET STREET
ELM STREET
LEE STREETMANN STREETPROJECT BOUNDARY
POST-DEVELOPMENT
IMPERVIOUS AREA