HomeMy WebLinkAboutZ-6694 Map 1=
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11� �° Al
\� NEW FIRE
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PER CITY
Z.GGs�I
POST 24' MIN V *4W
IN EARTH a y9! ��IvfPF
l�I,pF
GEOTEXTILE FABRIC
W/ 16' +/- BURRIED
COMPACTED
EARTH FILL
Entrato Gate
SILTFENCE
N.T.S.
369
Existing W(
Y
366.5 (bank)
SILT FENCE
EXTEND EXIST PARKING
SB2 GRAVEL OVER GEO
NEW 4' SB2 GRAVEL
OVER NEW GEO FABRIC
Grassy Flat Creek
Base Floc! Bev 366.5+1-
h* * MH
NOTES:
1. STRAW BALES TO BE INSTALLED W/ BINDINGS ORIENTED AROUND
THE SIDES AND NOT ALONG THE ENDS, BALES SHALL BE 30'
MIN IN LENGTH
2. BALES TO BE KEYED INTO THE SOIL 4' MDI WITH NO GAPS
BETWEEN BALES
2 STAKES PER BALE
BALED STRAW
BALED STRAW BARRIER FILTER
N,T,S,
Eaftmert
i
i
EXIST LD
& PARKING
Exist
0
C6 . rnE
HC
HC
EDGE OF ASPHIV.T
PAVING i
e �.. Asn FEeFrvE
., CABOT
e
i
s wo ¢
.m� MAUMELLE
SHEW KCKS�dUILLE
PROJEC AREA #
°s
NOR ROCK
1430 4 u370
LEGEND r
Ax I
LITTLER i
E SCR.3p
Sanitary Sewer Line e1 s
i ,s,6
Water Service Line
�190I
130
Electric Service Line
BENTON
Pipe Drop/Culvert ENGLAND
NT8d30'E 6
Grated Inlet
Drainageways — _ PULASKI COUNTY, ARKANSAS
Exist Grades --
Existing Woods ANALYSIS OF STORM FLOW RUNNOFF FROM PLANNED IMPROVEMENTS
A. METHODOLOGY
1, DDDettterminedc�l1 Drainage Area affecting the planned construction area
3. Deterrmined ire o d oncentra�iori o rflowmpol xeai°sting ane) lme ratf on eus�ng �IRrC Mie oc�s d after construction condition
4, Used Rational Method to determine peak inflow rates for a 25 year storm event under existing and after condition
J5. Estimated storage capacity of existing detention area
6. Used NRCS shortcut Storm Routing Procedure to estimate site outflow peak rate
o B. DRAINAGE AREA OF PLANNED IMPROVEMENT AREA EXISTING AFTER
Cl -
1, Slow runoff (Grass or shrub covered) 'c' = 03 0.3 0.45
_ 369 2, Faster runoff (Paved, Gravel or Roofs) 'c' = 0,7 0,7 0,65
Total Area Acres l,l 1.1
\ — 370 C. ESTIMATED RUNOFF CURVE 80 85
Spill D. TIME OF CONCENTRATION Tc HRS 0,11 0.09
Orn¢
sexc, t
,.,yam no- axsn�
rb
IST GRAVEL DRIVE
&PARKING , Ada
_....,...-: `s....._::::::.
walk
%3Al,Ca��a SEE ARCH FLOOR PLAN
m ��` FOR AREA BETWEEN BLDG
E, PEAK INFLOW RATE Qt CFS 3,2 41
X370 F. ESTIMATED EXISTING DETENTION STORAGE AF 2,5 2.5
G, 25 YR FREQ RUNOFF VOLUME INS 4.7 5,3
� H, CALCULATED PEAK OUTFLOW RATE Qo CFS 0,76 1.16
37, o � I. CONCLUSIONS
372 M N 1, Site improvements will only include i,i acres of drainage area
�, 2, Existing as well as post construction runoff rates are extremely small (less than 12 cfs)
373 N 3. The change in conditions and runoff volumes should be less than 0,5 cfs
4, Planned diversion and erosion control features and outlet structures should minimize runoff impacts
\—"37'8 ` NOTES: ENGINEERING ACCURACY
\ 376 * Elevations based on previously established ,44S ° °
�- floor elevation of existing building as shown. i0 H">�S S I, T.P. Bass P.E. , hereby certify that this
* N' REGISTERED site plan correctly represents a plan made by me,
77
Silt Fences will be used to control erosion and PR FESS Q'AL ; and that engineering requirements of the City of
I prevent offsite sedimentation. I ER
,\ � Little Rock Rules and Regulations have been
* Ha bale check dams will be laced at all Vo.41complied with.Y P� n
drain outlets during construction. Signed 'J _Date D-rte'-zr,6 g
* The existing detention pond norttl of the
construction area will be maintained for water
Planned New Overftead quality protection.
p New - To Etds" Service
E All earth fills required for planned parking and structural foundations shal
0 0 \ ` be compacted to 95% Standard Density at near Optimum Moisture.
0
o C 5
\ \ PWIan ole perimeter t01n& 2 stbunland hole filled with compacted material.
r 383
Propeo Line D 3K
SM
25 SM952V
Feet
"'Y LEGAL DESCRIPTION:
378 PART OF THE WEST HALF OF THE NORTHWEST QUARTER OF THE SOUTHWEST
QUARTER OF THE NORTHWEST WUARTER OF SECTION 35, TOWNSHIP 2 NORTH,
RANGE 13 WEST, LITTLE ROCK, PULASKI COUNTY, ARKANSAS, DESCRIBED AS:
—p�ryjce BEGINNING AT THE SOUTHWEST CORNER OF SAID W 1/2 NW 1/4 SW 1/4 NW 1/4
By Eft OF SECTION 35, THENCE NORTH 02 DEG, 18 MIN. 32 SEC. EAST ALONG THE WES'
LINE THEREOF, 244.04 FEET; THENCE NORTH 84 DEG, 34 MIN. 31 SEC. EAST,
58.38 F EETt THENCE NORTH 82 DEG, 15 MIN. 16 SEC. EAST, 96.54 FEETt THENCE
EdNtn9Trans TWff NORTH 74 DEG 10 MIN, 41 SEC. EAST, 90.0 FEET; THENCE NORTH 78 DEG. 30 Mn
38 SEC. EAS 9401 FEET TO THE EAST LINE OF SAID W 1/2 NW 1/4 SW 1/4
-- •.,... 1 NW 1/4 OF �ECTIUN 35 : [":CE cNUTH 02 DEG, 278' 52 SEC. WEST ALONG SAI
r_AST LINE, 3 ET :!' THE SnUTHEAST COQ^tER THEREOF; THENCE NORTH I
?)EG 40 ME aE SOUTH LINE THEREOF, 328,8 FEET TO TH
little Rock Bible Chase!
Topographic Mai &Site Plan
SASS ENGINEERING INC
North Little Rock, AR 72116 Sheet No.
501-834-7785 C 1.0
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