HomeMy WebLinkAboutZ-7757 Map 3• ,,,4' VERTICAL FACE
E..:yrD;,G DErAIL
FLOW
ANGLE FIRST STAKE THROUGH
PREVIOUSLY WD STRAW BALE
FLOW .
/T STAKE 1.5' TO 2'
IN GROUND
STRAW BALES PLACED
ALONG EQUAL CONTOUR
IDI i
STRAWBALE DIK
BACKFILL WITH GRAVEL 0
NATIVE MATERIAL IN TREN
AND ON BOTH SIDES OF
FILTER FABRIC ON SURFA
WIRE MESH WITH
NON -REINFORCED
FILTER FABRIC. �
FILTER FABRIC
FILTER FABRIC. USE STAPLES
OR WIRE RINGS TO ATTACH
FABRIC TO WIRE. -%
STORM WATER DETENTION CALCULATION
1. Area of improvment: 0.055 acres (2394 sq. ft.)
2. Assume minimum time of concentration
of 5.0 minutes due to size size and length
of improvement.
3. Intensity: 8.5 in./hr. (25 year event)
4. Pre -developed run-off coefficient (C value): 0.30
Post -developed run-off coeffiecient (C value): 0.90
5. Pre -developed flows (Q):
Q(10): (0.30)(7.4)(0.055) 0.12 c.f.s.
Q(25): (0.30)(8.5)(0.055) 0.14 c.f.s.
Q(50): (0.30)(9.2)(0.055) 0.15 c.f.s.
0(100): (0.30)(10.2)(0.055) 0.17 c.f.s.
6. Post -developed flows (Q):
Q(10): (0.90)(7.4)(0.055) 0.37 c.f.s.
0(25): (0.90)(8.5)(0.055) 0.42 c.f.s.
Q(50): (0.90)(9.2)(0.055) 0.46 c.f.s.
Q(100): (0.90)(10.2)(0.055) Oso C.f.s.
7. Total allowable flow (pre -developed, 025): 0.14 c.f.s.
8. Volume of storm water increase per storm duration:
Q00): (0.37-0.12)*300 = 75 cu. ft.
Q(25): (0.42-0.14)*300 = 84 cu. ft.
Q(50): (0.46-0.15)*300 = 93 cu. ft.
Q(100): (0.50-0.17)*300 = 99 cu. ft.
9. An in -lieu contribution of $0.23 per cubic foot of storm
water increase for the 25 year storm duration. Based on the
84 cubic foot increase for the 25 year storm, (84)*(0.23),
$19.32 is due the City of little Rock Public Works Department
prior to issuance of a building permit.
SOIL LOSS CALCULATIONS
SOIL TYPE: CARASAW ; K=.32
A=300(K)(LS)(C)(P)
INITIAL SOIL LOSS:
L=40' ® 2% ; LS = 0.151
A=300(.32)(0.151)(1)(1)=14.5 T/A/Y
POST -GRADING SOIL LOSS:
L=40' ® 2% ; LS = 0.151
A=300(.32)(0.151)(0.24)(1.0)=3.48 T/A/Y
SO, USE LOOSE HAY OR STRAW AT 1.5 T/A ON
DISTURBED AREA FOLLOWING GRADING.
NOTES:
1. LAND AREA TO BE DISTURBED - 0.055 ACRES
2. ALL SITE RUNOFF IS COLLECTED AT THE SOUTHEAST
CORNER OF THE SITE AND DISCHARGED INTO THE
ADJACENT SITE TO THE EAST.
3. SILT FENCE WILL BE USED DURING CONSTRUCTION
AROUND DISTURBED AREAS OF THE SITE TO
CONTROL EROSION.
GRAVEL WILL BE USED AT THE ENTRANCE TO MINIMIZE
OFF-SITE TRACKING.
4. DISTURBED AREAS WILL BE SODDED AFTER CONSTRUCTION.
E.
TING SITE INFORMATION IS DERIVE
Y FROM INFORMATION PROVIDED
THE OWNER.
TRACTOR TO VERIFY PROPERTY
NERS, EXISTING TOPOGRAPHY
SITE FEATURES PRIOR TO
4VATION TO AVOID OFF-SITE
-SITE CONSTRUCTION RELATIVE
THE. PROPOSED CONSTRUCTION.
)E IMPROVEMENTS TO DRAIN
DOSTING DRAINAGE PATHS.
L1- SILT FENCE
JND THE PERIMETER
THE DISTURBED AREAS
EROSION CONTROL
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RELOCATE OR REPLACE
SHRUBS AND TREES
THAT ARE DISTURBED
BY NEW CONSTRUCTION
j
SAWCUT EDGE OF�
EXISTING ASPHALT --
PAVMENT AND MATCH
NEW PAVEMENT TO
SAWCUT EDGE.
LISTING BUILDING
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ti W50'18* w 1200.7s'
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GENERAL NOTES
1. THE LOCATION OF THE EXISTING WATER AND GAS UTILITIES ARE
BASED ON RECORDS FROM SAID UTILITY COMPANIES AND ARE
HORIZONTALLY FIELD LOCATED ONLY. THE CONTRACTORS SHALL
BE RESPONSIBLE FOR DETERMINING ACTUAL LOCATION.
2. CONTRACTOR TO UNCOVER AND MARK UTILITY LINES BEFORE CONSTRUCTION.
3. CONTRACTOR SHALL BEAR ALL RESPONSIBILITY AND COST OF REPAIR
OR REPLACEMENT OF EXISTING UTILITIES, DAMAGED OR INTERRUPTED
AS A RESULT OF THIS CONSTRUCTION PROJECT.
4. CONTRACTOR SHALL NOTIFY THE PROJECT ENGINEER AND THE
OWNER OF ANY DAMAGED OR INTERRUPTED UTILITIES IMMEDIATELY.
7. CONTRACTOR SHALL NOTIFY PROJECT ENGINEER PRIOR TO BEGINNING WORK.
8. ALL AREAS WITHIN THE PARKING LOT ARE TO RECEIVE LOOSE HAY OR
STRAW TO PROVIDE EROSION CONTROL IF WORK IS NOT PROGRESSING
IN AN ORDERLY MANNER. A RATE OF 2.0 TONS/ACRE IS TO BE
APPLIED WITHIN TWO WEEKS OF FINAL GRADING.
9. ALL AREAS NOT WITHIN THE PARKING LOT ARE TO RECEIVE LOOSE STRAW
TO PROVIDE EROSION CONTROL IF WORK IS NOT PROGRESSING
IN AN ORDERLY MANNER. A RATE OF 1.5 TONS/ACRE IS TO BE
APPLIED WITHIN TWO WEEKS OF FINAL GRADING.
10. AFTER NEW CURB CUTS ARE CONSTRUCTED, STRAW BALES AND GRAVEL
FILTER BERMS ARE TO BE PLACED TO ALLOW FLOW THROUGH THE BERM.
11. CONTRACTOR WILL CONTROL AND PREVENT OFF-SITE TRACKING
OF CONSTRUCTION RUNOFF AND SEDIMENT TO ADJACENT PROPERTY
AND PUBLIC ROADS.
12. ENGINEER IS NOT LIABLE FOR ACCURACTY OF THE EXISTING SITE
INFORMATION. CONTRACTOR TO VERIFY PRIOR TO CONSTRUCTION.
SITE INFORMATION
TOTAL LOT AREA = 21,459 SQ. FT.
EXISTING IMPERVIOUS AREA = 13,354 SQ. FT.
62.2%
ADDITIONAL IMPERVIOUS AREA = 2,394 SQ. FT.
1
TOTAL IMPERVIOUS AREA = 15,748 SQ. FT.
1
EXISTING GREEN AREA = 8,105 SO. FT.
37.8%
PROPOSED GREEN AREA = 5,711 SQ. FT.
26.8%
,30 0 C Ci
ti W50'18* w 1200.7s'
fes\
s
GENERAL NOTES
1. THE LOCATION OF THE EXISTING WATER AND GAS UTILITIES ARE
BASED ON RECORDS FROM SAID UTILITY COMPANIES AND ARE
HORIZONTALLY FIELD LOCATED ONLY. THE CONTRACTORS SHALL
BE RESPONSIBLE FOR DETERMINING ACTUAL LOCATION.
2. CONTRACTOR TO UNCOVER AND MARK UTILITY LINES BEFORE CONSTRUCTION.
3. CONTRACTOR SHALL BEAR ALL RESPONSIBILITY AND COST OF REPAIR
OR REPLACEMENT OF EXISTING UTILITIES, DAMAGED OR INTERRUPTED
AS A RESULT OF THIS CONSTRUCTION PROJECT.
4. CONTRACTOR SHALL NOTIFY THE PROJECT ENGINEER AND THE
OWNER OF ANY DAMAGED OR INTERRUPTED UTILITIES IMMEDIATELY.
7. CONTRACTOR SHALL NOTIFY PROJECT ENGINEER PRIOR TO BEGINNING WORK.
8. ALL AREAS WITHIN THE PARKING LOT ARE TO RECEIVE LOOSE HAY OR
STRAW TO PROVIDE EROSION CONTROL IF WORK IS NOT PROGRESSING
IN AN ORDERLY MANNER. A RATE OF 2.0 TONS/ACRE IS TO BE
APPLIED WITHIN TWO WEEKS OF FINAL GRADING.
9. ALL AREAS NOT WITHIN THE PARKING LOT ARE TO RECEIVE LOOSE STRAW
TO PROVIDE EROSION CONTROL IF WORK IS NOT PROGRESSING
IN AN ORDERLY MANNER. A RATE OF 1.5 TONS/ACRE IS TO BE
APPLIED WITHIN TWO WEEKS OF FINAL GRADING.
10. AFTER NEW CURB CUTS ARE CONSTRUCTED, STRAW BALES AND GRAVEL
FILTER BERMS ARE TO BE PLACED TO ALLOW FLOW THROUGH THE BERM.
11. CONTRACTOR WILL CONTROL AND PREVENT OFF-SITE TRACKING
OF CONSTRUCTION RUNOFF AND SEDIMENT TO ADJACENT PROPERTY
AND PUBLIC ROADS.
12. ENGINEER IS NOT LIABLE FOR ACCURACTY OF THE EXISTING SITE
INFORMATION. CONTRACTOR TO VERIFY PRIOR TO CONSTRUCTION.
SITE INFORMATION
TOTAL LOT AREA = 21,459 SQ. FT.
EXISTING IMPERVIOUS AREA = 13,354 SQ. FT.
62.2%
ADDITIONAL IMPERVIOUS AREA = 2,394 SQ. FT.
11.1%
TOTAL IMPERVIOUS AREA = 15,748 SQ. FT.
73.2%
EXISTING GREEN AREA = 8,105 SO. FT.
37.8%
PROPOSED GREEN AREA = 5,711 SQ. FT.
26.8%
BUIILDING AREA = 4,237 SO. FT.
19.7%
PARKING AREA = 11,511 SQ. FT.
53.6%
0
HMAC SURFACE COURSE, TY. 2
k
�6 CRUSHED AGGREGATE BASE COURSE, Cv 7
8- (MIN) COMPACTED SUBGRADE TO 95%
STANDARD PROCTOR DENSITY.
TYPICAL PAVING SECTION
NTS
LIP
CONCRETE CURB CLASS
3 & 4 UPRIGHT DETAIL
NTS
10 5 0 10 20
SCALE
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SCALE 1 " = 10'
RAWN BY : MER
CHECKED BY
PPROVED BY
A� 10/21/04
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