20190889 Ver 2_SW GRADING/RIP-RAP DETAILS_20191206

STEP 11 STEP 2 STEP 3 CURB INLET
DRIVE STEEL POSTS 18" INTO GROUND ATTACH WIRE FENCE TO POSTS AND ATTACH THE FILTER FABRIC TO THE WIRE CONSTRUCTION SPECIFICATIONS:
AND EXCAVATE A 8" X 6" TRENCH UPHILL EXTEND THE BOTTOM OF THE FENCE FENCE AND EXTEND THE BOTTOM OF THE p O
ALONG THE LINE OF POSTS. 8" INTO THE EXCAVATED TRENCH. FABRIC 8" INTO THE TRENCH. 1. USE A SYNTHETIC FILTER FABRIC OR A PERVIOUS SHEET OF POLYPROPYLENE, < V
NYLON, POLYESTER, OR POLYETHYLENE YARN, WHICH IS CERTIFIED BY THE i
MANUFACTURER OR SUPPLIER AS CONFORMING TO THE REQUIREMENTS SHOWN o ORMAN ` ti 04 w
BELOW. CDQ ROAD N N o M v
SYNTHETIC FILTER FABRIC SHOULD CONTAIN ULTRAVIOLET RAY INHIBITORS AND w �J N Z ti
MAX. 8' STABILIZERS TO PROVIDE A MINIMUM OF 6 MONTHS OF EXPECTED USABLE z TE z O L O r `BETWEEN CONSTRUCTION LIFE AT A TEMPERATURE RANGE OF 0 TO 1207. SI N G (610
POSTS 2. ENSURE THAT POSTS FOR SEDIMENT FENCES ARE EITHER 4-INCH DIAMETER J C T\ E = M M N
PINE, 2-INCH DIAMETER OAK, OR 1.33 lb/LINEAR FT. STEEL WITH A MINIMUM CONSTRUCTION SPECIFICATIONS z z J T w
LENGTH OF 4 FT. MAKE SURE THAT STEEL POSTS HAVE PROJECTIONS TO d -
\ FACILITATE FASTENING THE FABRIC. 1. LAY ONE BLOCK ON SIDE OF THE STRUCTURE ON ITS SIDE IN THE BOTTOM ROW TO ALLOW = m N
�P4� 8' �PLn
�pR�t1 �p�F� POOL DRAINAGE. PLACE THE BOTTOM ROW OF BLOCKS AGAINST THE EDGE OF THE STORM DRAIN z 3
l 6" F� T\ �� FAO 3. FOR REINFORCEMENT OF STANDARD STRENGTH FILTER FABRIC, USE WIRE CONCRETE BLOCK FOR LATERAL SUPPORT AND TO AVOID WASHOUTS WHEN OVERFLOW OCCURS. IF NEEDED, GIVE 3
FENCING WITH A MINIMUM 14 GAUGE AND A MAXIMUM MESH SPACING OF 6 WIRE SCREEN LATERAL SUPPORT TO SUBSEQUENT ROWS BY PLACING 2x4 WOOD STUDS THROUGH BLOCK
INCHES. GRAVEL FILTER (NO. 4 WASHED) OPENINGS.
STEP 4:
BACKFILL THE TRENCH AND COMPACT PHYSICAL PROPERTY REQUIREMENTS 2. CAREFULLY FIT HARDWARE CLOTH OR COMPARABLE WIRE MESH WITH 1/2 INCH OPENINGS
THE SOIL FIRMLY TO ANCHOR THE OVER ALL BLOCK OPENINGS TO HOLD GRAVEL IN PLACE. Fc
BOTTOM OF THE SILT FENCE SO THAT SECTION FILTERING EFFICIENCY 85% (MIN) WIRE SCREEN BOG CHURCH
RUNOFF IS FORCED TO GO THROUGH THE 3. USE CLEAN GRAVEL, 3/4 TO 1/2 INCH IN DIAMETER, PLACED 2 INCHES BELOW THE TOP OF 'I'p
FENCE AND CANNOT GO UNDER IT. WIRE FENCE "HOG WIRE" TENSILE STRENGTH AT STANDARD STRENGTH- THE BLOCK ON A 2:1 SLOPE OR FLATTER AND SMOOTH IT TO AN EVEN GRADE. NC DOT #57 9L
STEEL POSTS i'(14 GAUGE WITH MAX. 20% (MAX.) ELONGATION 30 Ib./lin IN (MIN) WASHED STONE IS RECOMMENDED. F�G� p�SGPH
l�rrrf
MESH SPACING = 6 IN. MAINTENANCE ++
NOTE: EXTRA STRENGTH-
BOTTOM OF FILTER MUST 50 Ib/lin IN (MIN) CiAR ♦�
FILTER FABRIC SEE BE PLACED IN TRENCH ®❑ •��\ �C
HEIGHT: SPECS. FOR MATERIAL AND SECURED BY PLACING SLURRY FLOW RATE 0.3 gal/sq ft/min (MIN) INSPECT THE BARRIER AFTER EACH RAIN AND MAKE REPAIRS AS NEEDED. • •••••rr•r / �I
� � 4. • � •O�ESS'/(� •rr f
MAX. 3' WASHED STONE TO A HEIGHT OF '_ ti
MIN. 2' BOTTOM OF WIRE FENCE AND 6" ABOVE GROUND LEVEL. REMOVE SEDIMENT AS NECESSARY TO PROVIDE ADEQUATELY STORAGE VOLUME FOR • • s
FILTER FABRIC BURIED 8" IN MAINTENANCE: :.' SUBSEQUENT RAINS. SEAL
EXCAVATED TRENCH. 2x4 WOOD STUD • y
INSPECT SEDIMENT FENCES AT LEAST ONCE A WEEK AND AFTER EACH RAINFALL. (THRU BLOCKING) 0 WHEN THE CONTRIBUTING DRAINAGE AREA HAS BEEN ADEQUATELY STABILITY, REMOVE ALL '16
III= I =I'III=III-11 II=III - MAKE ANY REQUIRED REPAIRS IMMEDIATELY. MATERIALS AND ANY UNSTABLE SOIL, AND EITHER SALVAGE OR DISPOSE OF IT PROPERLY.
-1I
'1=1I I-III I I I- ' ►'s+ ••NG1N��r• G��
III-III=III STEEL POST DRIVEN SHOULD THE FABRIC OF A SEDIMENT FENCE COLLAPSE, TEAR, DECOMPOSE OR BRING THE DISTURBED AREA TO PROPER GRADE, THEN SMOOTH AND COMPACT IT. ♦ •r••••r•
-, CURB INLET �
�P��31 IIII IIIIIIIIIII- 18" INTO GROUND BECOME IN EFFECTIVE, REPLACE IT PROMPTLY. REPLACE BURLAP EVERY 60 DAYS. APPROPRIATELY STABILIZE ALL BARE AREAS AROUND THE INLET. Q,
REMOVE SEDIMENT DEPOSITS AS NECESSARY TO PROVIDE ADEQUATE STORAGE
VOLUME FOR THE NEXT RAIN AND TO REDUCE PRESSURE ON THE FENCE. TAKE VICINITY MAP (1 "=2000')
CARE TO AVOID UNDERMINING THE FENCE DURING CLEANOUT. BLOCK 8c GRAVEL CURB INLET PROTECTION
REMTHEOVE AREALTOFGRAING DE ANDERIALS STABILIZEDITUNSTABLE AFTER THEEDIMENT CONTRIBUTNG DRAINAGE AREA TS AND BRING N.T.S. SITE INFORMATION
SILT FENCE DETAIL HAS BEEN PROPERLY STABILIZED.
NTs EX. ZONING PNR
WIRE SCREEN CONCRETE
CURRENT LANDUSE SCIENCE CENTER
PROP. LANDUSE SCIENCE CENTER
DO ° TAX MAP NUMBER 00-06-0350-0-0767-SE005
l
DEED REFERENCE D.B. 002421 PG. 00650
I 0% GRADE EILI
III- PLAT REFERENCE
-III NOTES: 1. PLACE CONCRETE BLOCKS LENGTHWISE ON THEIR SIDES IN A SINGLE ROW AROUND THE PERIMETER OF THE TOTAL AREA 343.57 AC
III I-I I a . ° INLET, WITH THE ENDS OF ADJACENT BLOCKS ABUTTING. THE HEIGHT OF THE BLOCKS SHALL BE 12". WATERSHED WS-III
DESIGN AGGREGATE SIZE - USE 2-3 INCH WASHED STONE SYNTHETIC FILTER _ 2. WIRE MESH OR HARDWARE CLOTH W/ 1/2" OPENINGS SHALL BE PLACED OVER THE OUTSIDE VERTICAL FACE
CRITERIA: FABRIC (AS PER NCDO I i III _ _ - I I I- e a (webbing) OF THE BLOCKS, TO PREVENT STONE FROM BEING WASHED THROUGH THE HOLES IN THE BLOCKS. AVERAGE SLOPE 2.15 % OF DEVELOPED AREA
DIMENSIONS OF GRAVEL PAD - THICKNESS = 6 INCHES MINIMUM SPEC. #1056 TYPE=2) I-III-I ° °, ° ' .4. a 3. #57 WASHED STONE SHALL BE PILED AGAINST THE WIRE TO THE TOP OF THE BLOCK. ( )
WIDTH = 12 FOOT MINIMUM OF FULL WIDTH AT ALL POINTS OF THE i ' 4. MAINTAIN DEVICE AFTER EACH RAIN. REPLACE #57 WASHED STONE IF IT CLOGS W/ SEDIMENT.
VEHICULAR ENTRANCE AND EXIT AREA, WHICHEVER IS GREATER I I-III CLASS B DISTANCE TO
LENGTH = 50 FOOT MINIMUM X. GROUND RIP-RAP 5. PLACE 1"X4" BOARDS THROUGH THE HOLE OF CORNER BLOCKS.
LOCATION = LOCATE CONSTRUCTION ENTRANCES AND EXITS TO LIMIT NEAREST FEMA 200' WEST OF NW CORNER
SEDIMENT FROM LEAVING THE SITE AND TO PROVIDE FOR MAXIMUM
UTILITY BY ALL CONSTRUCTION VEHICLES. AVOID STEEP GRADES FLOOD PLAIN
AND ENTRANCES AT CURVES IN PUBLIC ROADS. 0 0
SITE CONDITIONS MAY REQUIRE VARIATIONS FROM THESE DESIGN CRITERIA. VARIATIONS WILL BE DETERMINED MAINTENANCE SOILS CeB2, CCC, CCB, MoE
OR APPROVED BY THE APPROPRIATE STATE EROSION CONTROL AUTHORITY. WIRE SCREEN INSPECT THE BARRIER AFTER EACH RAIN AND MAKE REPAIRS AS NEEDED.
EX. GROSS
o REMOVE SEDIMENT AS NECESSARY TO PROVIDE ADEQUATELY STORAGE VOLUME FOR FLOOR AREA 108,356 SF
MAINTENANCE FILTERED WATER 1414
y
SUBSEQUENT RAINS.
MAINTAIN THE GRAVEL PAD IN A CONDITION TO PREVENT MUD OR SEDIMENT FROM PROP. GROSS 15,979 SF (123,200 SF TOTAL) \
LEAVING THE CONSTRUCTION SITE. THIS MAY REQUIRE PERIODIC TOP DRESSING WITH 2- ❑ E WHEN THE CONTRIBUTING DRAINAGE AREA HAS BEEN ADEQUATELY STABILITY, REMOVE ALL FLOOR AREA
INCH STONE. AFTER EACH RAINFALL, INSPECT ANY STRUCTURE USED TO TRAP SEDIMENT
AND CLEAN IT OUT AS NECESSARY. IMMEDIATELY REMOVE ALL OBJECTIONABLE MATERIALS � MATERIALS AND ANY UNSTABLE SOIL, AND EITHER SALVAGE OR DISPOSE OF IT PROPERLY. 0 SPILLED, WASHED, OR TRACKED ONTO PUBLIC ROADWAYS. DO
FLOW 3DO W BRING THE DISTURBED AREA TO PROPER GRADE, THEN SMOOTH AND COMPACT IT. ACREAGE PERCENTAGE
\\ y\\/\\/\� \ j.. ..❑ ❑ APPROPRIATELY STABILIZE ALL BARE AREAS AROUND THE INLET. DISTURBED 5.51 AC 1.60% p
�\\\��j UNDISTURBED 338.06 AC 98.40% \ O
o
EX. BUA 10.441 AC 3.03 % Z
N
�ii'. DEMOED BUA 0.37 AC 0.11 %
O
BLOCK AND GRAVEL INLET PROTECTION PROP BUA 1.80 AC 0.52% � Z
s , N.T.S TOTAL BUA 11.871 AC 3.45% Scl
= _w
LA O O
EX. PERVIOUS 333.46 AC 96.96 %
NOTES: O
PLACE RIP-RAP AROUND PIPE AS DIRECTED OUTLET Do 3Do La w PROP. PERVIOUS -1.43 AC -0.42% � q O O
5 / BY THE ENGINEER. NUMBER (IN) (FT) (FT) (FT) y
P
TOTAL PERVIOUS 331.70 AC 96.55% �
6" MIN. 1 4 3 7 8 0
THICKNESS Q
2 15 3.75 6 9.25 PARKING INFORMATION W
Z
2" To 3" G � 1ti TOTAL 1 SPACE PER 400 SF (INTERIOR PUBLIC SPACE) _ � W
COARSE AGGREGATE
SPACES 65,300 SF *(1/400 SF) = 164 SPACES REQUIRED 1414
MAINTENANCE 512 11 H.C. SPACES REQUIRED, 15 H.C. SPACES PROVIDED o
INSPECT RIP-RAP OUTLET STRUCTURES WEEKLY AND AFTER SIGNIFICANT (1/2 INCH OR GREATER) C
RAINFALL EVENTS TO SEE IF ANY EROSION AROUND OR BELOW THE RIP-RAP HAS TAKEN PLACE, 2 VAN SPACES REQUIRED
OR IF STONES HAVE BEEN DISLODGED. IMMEDIATELY MAKE ALL NEEDED REPAIRS TO
CONSTRUCTION ENTRANCE DETAIL PREVENT FURTHER DAMAGE. OWNER INFORMATION
NTS RIP- RAP OUTLET PROTECTION DETAIL OWNER: DEVELOPER:
NTS CITY OF GREENSBORO GREENSBORO SCIENCE CENTER
PO BOX 3136 4301 LAWNDALE DR.
GREENSBORO, NC 27402 GREENSBORO, INC 27455
336-373-2489 CONTACT: GLENN DOBROGOSZ
PHONE: [phone] 05 11/15/19 Engr Comments
VARIABLE O EMAIL:GDOBROGOSZOGREENSBOROSCIENCE.ORG
® 10/21/19 EC Revisions
GENERAL NOTES: VARIABLE-/R' Q Q
0 9/30/19 Rev EC (Spoil
IN THE 4" CONC. PAVO (DITCHES, PLACE %2" EXPANSION JOINTS AT Q F_ LEGEND
30' INTERVALS AND AT ALL OTHER POINTS WHERE PROPOSED DITCHES ABUT z VAR' H O= U 9/22/19 Rev EC (Spoil)
ANGLE
RIGID OBJECTS. PLACED GROOVED JOINTS 1" DEEP AT 10' INTERVALS `T O O u)=z NOTES.' � 8/22/19 Addendum 3
BETWEEN EXPANSION JOINTS. w Q z LL. 1) EROSION STONE TO BE "CLASS I" RIP-RAP UNLESS DESIGNATED DIFFERENTLY ON NAIL SET/FOUND Mk Date Description
�v CC O CD CONSTRUCTION PLAN. O IRON PIPE FOUND Line Legend P
CONSTRUCT WIDTH AND SHAPE OF PROPOSED 4 CONCRETE PAVED DITCHES Q I.- H Revisions
AS SHOWN OR AS DIRECTED BY THE ENGINEER. c i w p_j 2) PIPE SIZE AND AMOUNT NEEDED TO BE DETERMINED BY ENGINEER ON CONSTRUCTION DO IRON PIPE SET SANITARY SEWER LINE (SIZE & TYPE AS NOTED) --
�-I PLAN. NC DOT RIGHT-OF-WAY DISC
FOR DITCH GRADES ABOVE 2% EROSION CONTROL, INSTALL MATTING BASE DITCH OR o cn OVERHEAD UTILITY OH OHW
ON BOTH SIDES OF THE PAVING FOR A MINIMUM WIDTH OF 36" OR AS DIRECTED z ~ 3) TEMPORARY STREAM CROSSING TO BE CONVERTED TO COG AF214 UPON PROJECT � UTILITY POLE TREE PROTECTION FENCE TCA TCA
BERM DRAINAGE OUTLET DITCH '>
00 a H CONSTRUCTION COMPLETION IF CALLED FOR ON THE CONSTRUCTION PLANS. UTILITY POLE
BY THE ENGINEER. r w 0 GUY WIRE TREELINE
00 ,_ 0 4) PUMP AND LINE SIZE TO BE DETERMINED BY THE CONTRACTOR USING THE BASE FLOW S WATERLINE W
SHOWN ON THE CONSTRUCTION PLANS. O SANITARY SEWER MANHOLE
JOINT SEALER l2 2'-0" 2'-0" BERM DITCH 5) WIDTH OF CONSTRUCTION EASEMENT SHALL BE MINIMIZED BASED UPON FIELD CONDITIONS. o WATER METER
T 1/811
3'-O"± 3'-O"± MEDIAN DITCH ANY DISTURBANCES) EXCEEDING 40 ' MAY REGUIRE ADDITIONAL WATER GUALITY PERMITTING TREE PROTECTION LINE OR MITIGATION. FIRE HYDRANT PERM. EARTH BERM PEB PEB
1/8" RADIUS % " RADIUS © GAS VALVE
CONSTRUCTION SEQUENCE FOR STREAM CROSSING 023.4 SPOT ELEVATION
JOINT FILLER y N/F NOW OR FORMERLY
M JOINT SEALER p 1) INSTALL PUMP AND LINE TO PUMP FLOW FROM AREA UPSTREAM OF TEMPORARY STREAM E/P EDGE OF PAVEMENT 0
ILL. = CROSSING TO AREA DOWNSTREAM OF CONSTRUCTION AREA. BEGIN PUMPING AND DIP DUCTILE IRON PIPE
CONTINUING PUMPING WHILE WORKING WITHIN THE STREAM.
MEDIAN OR BERM DITCH v wCR WHEELCHAIR RAMP
SHOWING GROOVED JOINT SHOWING EXPANSION JOINT z H 2) INSTALL UPSTREAM DAM, FILTER FABRIC, AND TEMPORARY CMP. COVER PIPE INLET
3.1
I--I WITH FABRIC AND SAND BAGS AS SHOWN IN INSET "A " WHILE WORKING IN THE STREAM.
Q G ALLOW STREAM FLOW THROUGH CMP AS SHOWN IN INSET "S" WHEN NOT WORKING WITHIN Q
THE STREAM. �� ,p ., Wa ile�®i®o,.®"+aml®II'IIII
VARIABLE � W 31 INSTALL DOWNSTREAM TEMPORARY 5TONE DAM AND FIL TER FABRIC TO PREVENT
_ > BACK FLOW INTO CONSTRUCTION AREA. d !A
p a
4) INSTALL PROPOSED EARTH BERMS ALONG TOP OF BANK ON EACH SIDE OF THE V
SHOULDER POINT z CONSTRUCTION AREA.
�
LU 5) INSTAL L DEWA TERING BASIN OR SIL T BAG A T TOP OF BANK. DENA TER CONSTRUCTION
SIDE DITCH W AREA BETWEEN TEMPORARY DAM USING THIS BASIN.
4 4 V 6) INSTALL THE 10 ' X 10 ' SEDIMENT TRAP OR SILT HAS.
12' VERTICAL CURVE
Z 7) UPON CONSTRUCTION COMPLETION. REMOVE TEMPORARY DAMS, FIL TER FABRIC, ANO
c'-a,, C) Q TEMPORARY CMP. DEPRESS TEMPORARY DAM BOTTOMS INTO STREAM BED UNTIL TOP OF „null
RIP RAP IS LEVEL WITH STREAM BOTTOM. CONVERT TO COG STANDARD #214 IF CALLED
PART LONGITUDINAL SECTION OF PAVED DITCH °C v FOR IN THE CONSTRUCTION PLANS.
SHOWING V-6" CURTAIN WALL REQUIRED AT EACH END B) UPON STABILIZATION OF CLEARED AREAS, REMOVE TEMPORARY EARTH BERM, SEDIMENT WESTCOTT, SMALL & ASSOCIATES, PLLC Date 09-13-2018
WHEN CURTAIN WALL FOR PAVED DITCH IS LOCATED ADJACENT TO A
TRAP AND DEWATERING BASIN. 125 SOUTH ELM STREET, SUITE 606 Drawn BY mbw
*
DEPTH,
DWITHRAINAGE
THE STRUCTURE
T G'C N THE DEPTH OF ME CURTAIN WALL D THE PIPE O INTERFERES GREENSBORO, NC 27401
„ 13 -D TO SHOULDER POINT WWW.WSAAENG.COM Check By vws
REDUCED BELOW 1 -G TO CLEAR THE TOP OF THE PIPE.
PHONE: [phone] Job No. 17-093
12' V . C . ROADWAY DITCH SHEET 1 OF 1
Sheet
850 . 01 COFFER DAM AND PUMP AROUND DETAIL
N.T.S.
DESIGNED BY:MICHAEL WESTCOTT [e-mail]
REVIEWED BY:TORI SMALL [e-mail] .
JOB NO.:E-1351.1