Z-6881-D Map 1S
-� LOT 5
CONSTRUCT CONCRETE .
DRIVEWAY APRON
Ise
`N/
/ o ° 113A0
Ia CONSTRUCT-�
/ CURB INLET
/ / FL -337.50"
/ I / CONSTRUCT
' JUN11111`t BOX
FL -331.75
i
I
3 �
�I f
W fI
CONSTRUCT 5' WIDE
CONCRETE SIDEWALK
ADJACENT TO R.O.W.
CONSTRUCT
DRIVE
it
HIGHLAND POINTE APARTMENTS
i
s�J
�r
�_L _iLL _iL
>. i
3-
DESIGN BUILD SEGMENTAL
-BLOCK RETAINING WALL
OWNER/ARCHITECT TO DETERMINE
STYLE AND COLOR
i�
- CONSTRUCT DUMPSTER PAD
8" THICK 3500 PSI CONCRETE
W/ #4 REBAR ® 6" O.C. v
CURB INLET
FL=357.50
\ STORMWATER DETENTION CALCULATIONS
AREA - 3.64 Acres
/ Average Slope - 10%
Undeveloped
Runoff Coefficient
Time of Concentration (min.) 10 10
�(\ 25 Year Rainfall Intensity (in./hr.) 7.1
Building 8,650 sf @ 0.92 7,958
/ \ Paved Areas 46,790 sf ® 0.92 43,047
/ /\) Lawn & Landscaping 103,300 sf ® 0.44 45,452
/ 158,740 sf 96,457..
Developed "C" Value = 96,457/158,740 = 0.61
/ Developed
Runoff Coefficient .61
Time of Concentration (min.) 5
25 Year Rainfall Intensity (in./hr.) 8.5
�I HIGHLAND POINTE APARTI
I
r!
I fizi
CONSTRUCT CONCRETE DRIVE THRU
5" THICK 4000 PSI CONCRETE
4" THICK SB -2
Differential Runoff Rate (R) =
0.61(8.5)-0.55(7.1) = 1.28 in./hr.
Simplified Volume Formula
0.55
Time of Concentration
10 min.
Volume Required
= R x A
x Tc
x 60
Use 8" DIP Pipe as Outlet
N Z
= 1.28 x
3.64
x 5 x
60
Q= 0.6 x 0.35 x (2 x 32.2 x
= 1,398
cubic
foot
Acreage
Volume Provided
Runoff Coeffecient
0,55
Time of Concentration
10 min.
42" CMP x
149' =
1,433
cubic
foot
5' dia Inlets x
24.9' =
489
cubic
foot
=
1,922
cubic
foot
Release 25 Year Undeveloped Flow
Acreage
3.64 Acres
Runoff Coeftecient
0.55
Time of Concentration
10 min.
25 Year Rainfall Intensity
7.1 in./hr.
Q = 0.55(7.1)(3.64) = 14.2 cfs
OF
Use 8" DIP Pipe as Outlet
N Z
Q = C x A x (2gh )1/2
Q= 0.6 x 0.35 x (2 x 32.2 x
13.2)1/2
= 6.1 cfs from South Developed Piece of Property
Release from North Undeveloped Piece of Property
Acreage
1.30 Acres
Runoff Coeffecient
0,55
Time of Concentration
10 min.
25 Year Rainfall Intensity
7.1 in./hr.
Q = 0.55(7.1)(1.30) = 5.1 cfs
Q m
Developed Released Flow
(6.1 +5.1)=11.2cfs<14.2cfs
30 0 30
Scale 1 " = 30 ft
90
GENERAL SITE UTILITY CONSTRUCTION NOTES:
SEE ARCHITECTURAL DRAWINGS FOR DETAILS GRADING AT
BUILDINGS, STEPS, WALKS, WALLS AND OTHER STRUCTURES
2. FINISH CONTOURS AND GRADES SHOWN ARE FOR FINISHED
SURFACES, ALLOWANCES SHALL BE MADE FOR PAVEMENTS, SLABS,
TOPSOIL, SOD, EfC. UNIFORM PLANES AND SURFACES SHALL BE
SHAPED BETWEEN FINISHED SPOT ELEVATIONS AND/OR FINISH CONTOURS
SHOWN. MINIMUM PAVEMENT SLOPES SHALL BE 1%, MINIMUM FINISH
SLOPES ON GRASS OR SOD SURFACES SHALL BE 1%, MINIMUM
LONGITUDINAL CONCRETE CURB & GUTTER SLOPE SHALL BE 0.6%,
SPILLOUT CURB SHALL BE USED ON THE HIGH SIDE OF PAVEMENT AND
AT DISCHARGE POINTS.
3. THE CONTRACTOR SHALL CONTROL EROSION ON THE SITE. ALL
SLOPES SHALL BE FERTILIZED, SEEDED AND MULCHED (OR LANDSCAPED)
AS SOON AS POSSIBLE. THE CONTRACTOR SHALL FILE A NOTICE OF
INTENT WITH THE ARKANSAS DPC&E. THE SITE SHALL
BE GRADED TO MAINTAIN POSITIVE DRAINAGE DURING CONSTRUCTION,
WATER SHALL NOT BE ALLOWED TO POND,
4. ALL AREAS TO BE CUT OR FILLED SHALL BE CLEARED AND
GRUBBED. THE MAXIMUM FILL SLOPE SHALL BE 3:1. ALL FILLS
SHALL BE MADE IN 8" LIFTS AND COMPACTED, AT OPTIMUM MOISTURE
CONTENT TO 95% OF MODIFIED PROCTOR DENSITY (ASTM D-1557), AS
DETERMINED BY IN-PLACE DENSITY TESTS. BORROW AND FILL
MATERIAL SHALL BE SELECT CLAY SAND OR SANDY CLAY HAVING A
LIQUID LIMIT LESS THAN 40 OR OTHER APPROVED FILL. FILL SOILS
CLASSIFYING AS SC OR GC ACCORDING TO THE UNIFIED SOILS
CLASSIFICATION SYSTEM ARE CONSIDERED SUITABLE. SHALE MATERIAL
USED IN FILL SHALL BE COMPACTED AT 3% ABOVE OPTIMUM MOISTURE
CONTENT WITH A VIBRATORY SHEERS FOOT COMPACTOR.
5. THE CONTRACTOR SHALL COORDINATE WITH EACH UTILITY COMPANY
PRIOR TO ANY EXCAVATION. ANY DAMAGE TO UTILITY LINES CAUSED
BY THE CONTRACTORS OPERATIONS SHALL BE REPAIRED AT THE
CONTRACTORS EXPENSE. THE CONTRACTOR SHALL VERIFY THE
HORIZONTAL AND VERTICAL ALIGNMENT OF EXISTING AND PROPOSED
STORM SEWER, SANITARY SEWER AND WATER LINES TO ENSURE THAT
THEY ARE INSTALLED WITH ADEQUATE COVER AND CLEARANCE . ALL
ROUGH GRADING SHALL BE COMPLETE BEFORE INSTALLATION OF STORM
SEWER, SANITARY SEWER AND APPURTENANCES, WATER MAINS, SERVICES
AND APPURTENANCES. ALL UTILITY TRENCHES SHALL BE BACKFILLED
AND COMPACTED WITH SELECT MATERIAL AS SPECIFIED IN NOTE #4
ABOVE.
6. THE CONTRACTOR SHALL COMPLY WITH ALL APPLICABLE LAWS,
CODES AND ORDINANCES GOVERNING WORK OF THIS TYPE.
7. THE INSTALLATION OF ALL CULVERT PIPE TO BE IN ACCORDANCE
WITH AHTD SPECIFICATIONS.
B. ALL EXISTING IMPROVEMENTS WHICH INTERFERE WITH THE WORK,
AND ARE NOT TO BE SAVED SHALL BE REMOVED AND DISPOSED OF.
IMPROVEMENTS IN THE RIGHT-OF-WAY WHICH ARE TO REMAIN SHALL BE
PROTECTED BY THE CONTRACTOR.
9. ALL REINFORCED CONCRETE PIPE (RCP) SHALL BE CLASS III WITH
BELL AND SPIGOT TYPE JOINTS. PIPE, MATERIAL AND INSTALLATION
SHALL BE IN CONFORMANCE WITH APPLICABLE ARKANSAS HIGHWAY AND
TRANSPORTATION DEPARTMENT (AHTD) STANDARD CONSTRUCTION
SPECIFICATIONS.
10. ALL WATER MAINS AND SEWER MAINS AND THEIR APPURTENANCES
INCLUDING INSTALLATION, SHALL COMPLY WITH THE LATEST
CENTRAL ARKANSAS WATER AND LITTLE ROCK WASTEWATER UTILITY
SPECIFICATIONS. CONNECTIONS SHALL NOT BE MADE TO EXISTING LINES
UN11L NEW CONSTRUCTION HAS BEEN TESTED AND APPROVED BY THE UTILITY.
11. THE CONTRACTORS ATTENTION IS SPECIFICALLY CALLED TO THE
LOCATION OF THE EXISTING IMPROVEMENTS.
THE CONTRACTOR SHALL BE SOLELY RESPONSIBLE FOR DAMAGING ANY
EXISTING IMPROVEMENTS WHICH ARE TO REMAIN.
PRIOR TO SUBMITTING HIS BID, THE CONTRACTOR SHALL REVIEW THE
PLANS AND SPECIFICATIONS. HE SHALL VISIT THE SITE AND INSPECT
THE CONDITION OF THE SITE AND THE ADJACENT IMPROVEMENTS.
12. THE CONTRACTOR SHALL CALL "ONE -CALL" FOR LOCATION OF ALL
UTILITIES PRIOR TO COMMENCEMENT OF ANY EXCAVATION.
13. ANY EXCESS EXCAVATED MATERIAL, NOT REQUIRED FOR CONSTRUCTION
OF FILLS SHALL BE DISPOSED OFFSITE.
Ait]A sAS N.
RRGISTEREN �$
FRiFESSIONAL t.
ENGINEER t
No.5033
13 WHITE -DA TERS & ASSOCIATES, INC.
s CIVIL ENGINEERING, LAND PLANNING & DEVELOPMENT, SURVEYING
24 RAHLING CIRCLE LITTLE ROCK, ARKANSAS 72223
V
z
Q
U
Q
U)
Q m
U
F O
W
LIL z J
r
GRADING, PAVING
DRAINAGE PLAN
7
REVISIONS IDATE
07-27-07
1191
DATE
JOB NO.
Z
W�
C7
I
SHEET
OF
'rt
V
N Z
Q
LU
N Q
Q m
O
N
U
Oa'
ZW
"LIJ
o
1z
Y
�zz
I -N
❑_
O N
Q��J
=Uj^
O
W
W
Uj
rrCLCL%-
C<1
V
z
Q
U
Q
U)
Q m
U
F O
W
LIL z J
r
GRADING, PAVING
DRAINAGE PLAN
7
REVISIONS IDATE
07-27-07
1191
DATE
JOB NO.
C2
C7
I
SHEET
OF