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Home My WebLink AboutZ-6881-D Map 2\ -,, __J�_LLJ OT 5 / -36 0 / / 111 / � �- 355 / -- LOT 4 \ CONSTRUCT HG- 345 RAMP (TYPICAL) CONSTRUCT CONCRETE ' DRIVEWAY APRON o� o i 3A0 Ia CONSTRUCT CURB INLET I FL 337.50' y I CONSTRUCT" - JUNCTION BOX m. ( I FL -331.75 -- 30P i h Rf 2e I LOT 3 CONSTRUCT 5' WIDE CONCRETE SIDEWALK ADJACENT TO R.O.W. r» CONSTRUCT CONCRETE DRIVEWAY APRON I I HIGHLAND POINTE APARTMENTS CURB INLET FL --357.5C vsA' aV. C -t 9� 1�7_ __6 \�� \ STORMWATER DETENTION CALCULATIONS GENERAL SITE UTILITY CONSTRUCTION NOTES: 1. SEE ARCHITECTURAL DRAWINGS FOR DETAILS GRADING AT \ AREA - 3.64 Acres Average Slope - 10% BUILDINGS, STEPS, WALKS, WALLS AND OTHER STRUCTURES. / Undeveloped 2. FINISH CONTOURS AND GRADES SHOWN ARE FOR FINISHED Runoff Coefficient 0.55 SURFACES, ALLOWANCES SHALL BE MADE FOR PAVEMENTS, SLABS, /\) \ Time of Concentration (min.) 10 TOPSOIL, SOD, ETC. UNIFORM PLANES AND SURFACES SHALL BE \�\ 25 Year Rainfall Intensity (in./hr.) 7,1 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 Building 8,650 sf ® 0.92 7,958 LONGITUDINAL CONCRETE CURB & GUTTER SLOPE SHALL BE 0.6%, Paved Areas 46,790 sf ® 0.92 43,047 SPILLOUT CURB SHALL BE USED ON THE HIGH SIDE OF PAVEMENT AND AT DISCHARGE POINTS. e> Lawn & Landscaping 103,300 sf ® 0.44 45,45 9, \ 158,740 sf 96,457 . 3. THE CONTRACTOR SHALL CONTROL EROSION ON THE SITE. ALL SLOPES BE FERTILIZED,/ Developed "C" Value = 96,457/158,740 = 0.61 AS SOONSASLPOSSIBLE. THE CONTDRACTORD HUALLHED FILE(ARNOTICECOAFED) / INTENT WITH THE ARKANSAS DPC&E. THE SITE SHALL BE GRADED TO MAINTAIN POSITIVE DRAINAGE DURING CONSTRUCTION, Developed WATER SHALL NOT BE ALLOWED TO POND. Runoff Coefficient 4. ALL AREAS TO BE CUT OR FILLED SHALL BE CLEARED AND 25 Year Time a Concentration (min5 GRUBBED. THE MAXIMUM FILL SLOPE SHALL BE 3:1. ALL FILLS \ r Rainfall Intensity (inn 5 ./hr.) 8.5 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 /\ Differential Runoff Rate (R) = 0.61(8.5)-0.55(7.1) = 1.28 in./hr. MATERIAL SHALL BE SELECT CLAY SAND OR SANDY CLAY HAVING A LIQUID LIMIT LESS THAN 40 OR OTHER APPROVED FILL FILL SOILS Simplified Volume Formula CLASSIFYING AS SC OR GC ACCORDING TO THE UNIFIED SOILS CLASSIFICATION SYSTEM ARE CONSIDERED SUITABLE. SHALE MATERIAL \ Volume Required = R x A x Tc x 60 USED IN FILL SHALL BE COMPACTED AT 3% A86VE OPTIMUM MOISTURE <J\ = 1.28 x 3.64 x 5 x 60 CONTENT WITH A VIBRATORY SHEERS FOOT COMPACTOR. 1,398 cubic foot Volume Provided 5. THE CONTRACTOR SHALL COORDINATE WITH EACH UTILITY COMPANY \ PRIOR TO ANY EXCAVATION. ANY DAMAGE TO UTILITY LINES CAUSED \ 42" CMP x 149' = 1,433 cubic foot BY THE CONTRACTORS OPERATIONS SHALL BE REPAIRED AT THE 5' dia Inlets x 24.9' = 489 cubic foot CONTRACTORS EXPENSE. THE CONTRACTOR SHALL VERIFY THE = 1,922 cubic foot 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 se 25 Year Undeveloped FlROUGH GRADING SHALL BE COMPLETE BEFORE INSTALLATION OF STORM Release ow Relea a ow Acres SEWER, SANITARY SEWER AND APPURTENANCES, WATER MAINS, SERVICES / g AND APPURTENANCES. ALL UTILITY TRENCHES SHALL BE BACKFILLED DESIGN BUILD SEGMENTAL Runoff Coeffecient 0.55 AND COMPACTED WITH SELECT MATERIAL AS SPECIFIED IN NOTE #4 -BLOCK RETAINING WALL Time of Concentration 10 min. ABOVE. OWNER/ARCHITECT TO DETERMINE 25 Year Rainfall Intensity 7.1 in./hr. STYLE AND COLOR Q = 0.55(7.1)(3.64) = 14.2 cfs 6. THE CONTRACTOR SHALL COMPLY WITH ALL APPLICABLE LAWS, CODES AND ORDINANCES GOVERNING WORK OF THIS TYPE. 1 Use 8" DIP Pipe asOutlet 7. THE INSTALLATION OF ALL CULVERT PIPE TO BE IN ACCORDANCE - CONSTRUCT DUMPSTER PAD Q = C x A x (2gh)' / WITH AHTD SPECIFICATIONS. 8" THICK 3500 PSI CONCRETE Q = 0.6 x 0.35 x (2 x 32.2 x 13.2) 8. ALL EXISTING IMPROVEMENTS WHICH INTERFERE WITH THE WORK, W/ #4 REBAR ® 6" O.C. v = 6.1 cfs from South Developed Piece of Property AND ARE NOT TO BE SAVED SHALL BE REMOVED AND DISPOSED OF. IMPROVEMENTS IN THE RIGHT-OF-WAY WHICH ARE TO REMAIN SHALL BE Release from North Undeveloped Piece of Property PROTECTED BY THE CONTRACTOR. Acreage 1.30 Acres 9. ALL REINFORCED CONCRETE PIPE (RCP) SHALL BE CLASS III WITH Runoff Coeffecient 0.55 BELL AND SPIGOT TYPE JOINTS. PIPE, MATERIAL AND INSTALLATION Time of Concentration 10 min. SHALL BE IN CONFORMANCE WITH APPLICABLE ARKANSAS HIGHWAY AND 25 Year Rainfall Intensity 7.1 in./hr. TRANSPORTATION DEPARTMENT (AHTD) STANDARD CONSTRUCTION It Q = 0.55(7.1)(1.30) = 5.1 cfs SPECIFICATIONS. Developed Released Flow 10. ALL WATER MAINS AND SEWER MAINS AND THEIR APPURTENANCES P INCLUDING INSTALLATION, SHALL COMPLY WITH THE LATEST (6.1 + 5.1) = 11.2 cfs < 14.2 cfs CENTRAL ARKANSAS WATER AND LITTLE ROCK WASTEWATER UTILITY SPECIFICATIONS. CONNECTIONS SHALL NOT BE MADE TO EXISTING LINES HIGHLAND POINTE APARTN UNTIL 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 1 THE CONDITION OF THE SITE AND THE ADJACENT IMPROVEMENTS. 12. THE CONTRACTOR SHALL CALL "ONE -CALL" FOR LOCATION OF ALL J UTILITIES PRIOR TO COMMENCEMENT OF ANY EXCAVATION. o 13. ANY EXCESS EXCAVATED MATERIAL, NOT REQUIRED FOR CONSTRUCTION OF FILLS SHALL BE DISPOSED OFFSITE. CONSTRUCT CONCRETE DRIVE THRU 5" THICK 4000 PSI CONCRETE 4" THICK SB -2 AvkOAS REGISTERED I ROFESSIONAL ENGINEER t �'dy NO.5033 T%Y E. ®FPS 13 WHITE -DA TERS & ASSOCIATES, INC. CIVIL ENGINEERING, LAND PLANNING & DEVELOPMENT, SURVEYING 24 RAHLING CIRCLE LITTLE ROCK, ARKANSAS 72223 GRADING, PAVING DRAINAGE PLAN REVISIONS DATE W]WIM 07-27-07 1191 DATE JOB NO. C2 C7 SHEET OF N? W N m o� qo �am X03 W ¢U 0 z k> 0 e a: F YV! ` % ` ErN r DCW ° 0wW/�w 0�5z rr CL LL %' < n GRADING, PAVING DRAINAGE PLAN REVISIONS DATE W]WIM 07-27-07 1191 DATE JOB NO. C2 C7 SHEET OF