20240314 Ver 1_Discovery Lake Permit Set 9-26-23_20240220

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REPAIR NIH DAM
INLETS AND OUTLETS
TASK ORDER C100809
DAM INVENTORY# DURHA-105
FEDERAL NID # NCO1666
DURHAM COUNTY, NC
- PREPARED FOR -
National Institutes of Health
111 TW Alexander Drive
Durham, NC 27709
RECOMMENDED SEQUENCE OF CONSTRUCTION
1. LOCATE OR SET CONTROL POINTS SUCH THAT THEY ARE VISIBLE AND CAN BE
RE-ESTABLISHED.
2. FLAG CLEARING LIMITS, LOCATE PROPERTY CORNER PINS, RIGHT OF WAY, AND
UTILITIES TO ENSURE THEY ARE NOT DISTURBED DURING THE COURSE OF THE
PROJECT.
3. INSTALL THE AERATION SYSTEM PUMP AS SHOWN ON THE SHORELINE, PLACE
AIR DISTRIBUTION TUBES IN THE LAKE, AND START THE AERATION OPERATIONS.
PERFORM AERATION FOR AT LEAST ONE WEEK PRIOR TO LOWERING POOL.
4. INSTALL SILT FENCE AND PERIMETER CONTROLS AS SHOWN ON PLAN.
5. TRAFFIC SHALL BE MAINTAINED ON THE ROAD ACROSS THE TOP OF THE DAM.
6. INSTALL SAFETY FENCE AND PEDESTRIAN INFORMATION SIGNS.
7. THE LAKE VOLUME WILL NEED TO BE DRAINED TO PERFORM THE REPAIR SINCE
THE 36 INCH LOW LEVEL DRAIN AND THE 60 INCH UPSTREAM INLETS MUST BE
ACCESSED AT THE LAKE BOTTOM. BEGIN DRAINING LAKE LEVEL BY OPENING
LOW LEVEL DRAIN VALVE. REGULATE THE AMOUNT OF VALVE OPENING TO
ENSURE THAT THE LAKE LEVEL IS LOWERED NO MORE THAN 1/2 FOOT PER DAY
UNTIL LAKE IS LOWERED APPROXIMATELY 3-4 FEETTHEN CLOSE VALVE.
8. SELECT A DAY WITH A FORECAST OF SEVERAL MORE DAYS WITHOUT RAIN AND
APPLY THE ROTENONE TREATMENT TO THE LAKE IN THE AFTERNOON; THEN
COLLECT AND DISPOSE OF THE FISH EARLY THE NEXT MORNING.
9. TEST ROTENONE LEVELS UNTIL HAS DIMINISHED TO SAFE LEVELS. IF NECESSARY,
APPLY COUNTERAGENT IF A RAIN EVENT OCCURS AND PRESENTS A RISK OF LAKE
LEVELS REFILLING TO NORMAL BEFORE TESTING VERIFIES THE WATER IS SAFE
AND THEN CONTINUE DRAINING THE LAKE.
10. WITH LAKE LEVEL DOWN WORK CAN COMMENCE ON CONSTRUCTION OF THE
WAVE PROTECTION ON THE DAM, PIEZOMETERS, REPAIRS ON BRIDGE 6, AND
THE SHORELINE FORTIFICATIONS AROUND THE PERIMETER OF THE LAKE
ACCORDING TO THE DETAILS AND LOCATIONS SHOWN IN THE PLANS.
11. ONCE LAKE IS DRAINED, TAKE ALL NECESSARY PRECAUTIONS FOR CONFINED
SPACE ENTRY. REMOVE ALL DEBRIS FROM THE PRINCIPAL SPILLWAY TOWERS
AND UPSTREAM CONDUITS AND FLUSH WITH WATER IF NECESSARY TO CLEAN
THEM OUT.
12. INSPECT THE RISER TOWERS AND UPSTREAM CONDUITS AND NOTIFY THE
ENGINEER IF ANY DISCREPANCIES OR UNFORESEEN CONDITIONS ARE FOUND.
13. REMOVE THE DEBRIS GRATES ON THE OUTLET END OF THE PRINCIPAL SPILLWAY
CONDUIT BY SAW CUTTING OR TORCHING.
14. ONCE LAKE IS DRAINED PUMP LAKE LEVEL DOWN TO AT LEAST ELEVATION 271.0
IN ORDER TO CONSTRUCT A COFFERDAM AROUND LOW LEVEL DRAIN INLET AND
PRINCIPAL INLET CONDUITS TO FACILITATE SLIP LINING. CONTRACTOR MAY
CONSTRUCT COFFERDAM USING EARTH MATERIAL FROM THE LAKE BOTTOM OR
BRING IN TEMPORARY MATERIALS THAT SHALL BE REMOVED FROM THE LAKE
AREA WHEN NO LONGER NEEDED, I.E. PORT -A -DAM, SUPER SACKS, ETC.
15. PROVIDE A 12" LOW FLOW PIPE THROUGH THE COFFERDAM WITH A VALVE TO
CONTROL FLOW AS SHOWN. MAINTAIN THE DRAINED LAKE LEVEL BY ALLOWING
NORMAL DAILY FLOW THROUGH THE 12" PIPE AND DIRECTING INTO THE LOW
LEVEL DRAIN.
16. TAKE ALL NECESSARY PRECAUTIONS FOR CONFINED SPACE ENTRY. REMOVE ALL
DEBRIS FROM THE PRINCIPAL SPILLWAY TOWERS AND DOWNSTREAM CONDUITS
AND FLUSH WITH WATER IF NECESSARY TO CLEAN THEM OUT.
17. SLIP LINE THE (2) 60" DIA SPILLWAY UPSTREAM INLET CONDUITS WITH 54" HDPE
DR-26 PIPE. CENTERING SPACERS SHALL BE USED TO ADEQUATELY CENTER THE
PIPE. THE INLET SLIP LINE SHALL BE INSTALLED FROM THE UPSTREAM END.
EACH WELD JOINT SHALL BE TRIMMED AND SOLIDLY FUSED TOGETHER
ACCORDING TO THE MANUFACTURER'S RECOMMENDATION. INSPECT THE PIPES
AFTER INSTALLATION IS COMPLETE TO ENSURE THERE ARE NO ANOMALIES TO BE
CORRECTED.
18. CLOSE VALVE ON 12" LOW FLOW PIPE IN COFFERDAM AND DEWATER WORK
AREA FOR LOW LEVEL DRAIN SLIP LINING.
19. SLIP LINE THE 36" DIA LOW LEVEL DRAIN CONDUIT WITH A 30" DIA HDPE DR-26
PIPE WITHOUT ALTERING THE VALVE THAT IS INSIDE THE TOWER. CENTERING
SPACERS SHALL BE USED TO ADEQUATELY CENTER THE PIPE.
20. INSTALL NON -SHRINK GROUT BULKHEAD AT EACH END OF THE LOW LEVEL DRAIN
CONDUIT AND AT EACH END OF THE UPSTREAM INLET CONDUITS WITH ONE
VENT PIPE TERMINATING 1 FT ABOVE THE CROWN OF EACH PIPE.
21. GROUT ANNULAR SPACE IN LOW LEVEL DRAIN CONDUIT AND THE UPSTREAM
INLET CONDUITS IN SUCH A MANOR TO NOT OVERWHELM BULKHEADS UNTIL
GROUT HAS CURED. DUE TO THE SLOPE OF THE UPSTREAM INLET CONDUIT THE
GROUT MAY NEED TO BE DONE IN STAGES.
22. ONCE THE LOW LEVEL DRAIN CONDUIT SLIP LINE GROUT HAS CURED THE
COFFERDAM AND/OR PUMP CAN BE REMOVED. MOVE EQUIPMENT OUT OF
LAKE AREA AND RESTORE ANY DAMAGE TO THE SHORELINE ACCESS LOCATION.
23. ONCE COFFERDAM HAS BEEN REMOVED AND WITH APPROVAL OF ENGINEER,
CLOSE LOW LEVEL DRAIN VALVE AND ALLOW LAKE TO REFILL. CONTRACTOR
SHALL MONITOR LAKE LEVEL WITH REGARDS TO THE SHORELINE
FORTIFICATIONS. IT IS EXPECTED THAT THE FORTIFICATIONS CAN BE COMPLETED
PRIOR TO RESTORATION OF NORMAL POOL. IF NOT, THE LAKE LEVEL SHALL BE
MAINTAINED AT 4 FT BELOW NORMAL POOL UNTIL THE SHORELINE
FORTIFICATIONS ARE COMPLETE.
NO PHOTOGRAPHS OR VIDEO OF
GOVERNMENT STAFF IS PERMITTED.
Vicinity Map
0 2000' 4000'
24. PRIOR TO THE LAKE REACHING NORMAL POOL DEMOLITION OF THE SLAB
AROUND THE OUTLET CONDUITS SHALL BE PERFORMED EXPOSING THE OUTLET
CONDUITS.
25. APPROXIMATELY 20 FT OF THE EARTH ADJACENT TO THE OUTLET CONDUITS
SHALL BE EXCAVATED.
26. REMOVE APPROXIMATELY 20 FT OF THE EXISTING OUTLET CONDUITS.
27. REMOVE ANY DEBRIS FROM OUTLET CONDUITS AND FLUSH WITH WATER IF
NECESSARY TO CLEAN THEM OUT.
28. INSPECT THE RISER TOWERS AND DOWNSTREAM CONDUITS AND NOTIFY THE
ENGINEER IF ANY DISCREPANCIES OR UNFORESEEN CONDITIONS ARE FOUND.
29. SLIP LINE THE 60" DIA SPILLWAY DOWNSTREAM OUTLET CONDUITS WITH 54"
O.D. HDPE DR-32 PIPE. CENTERING SPACERS SHALL BE USED TO ADEQUATELY
CENTER THE PIPE. THE OUTLET SLIP LINE SHALL BE INSTALLED FROM
DOWNSTREAM END.
30. INSTALL NON -SHRINK GROUT BULKHEAD AT EACH END OF OUTLET CONDUITS
WITH ONE VENT PIPE TERMINATING 1 FT ABOVE THE CROWN OF EACH PIPE.
31. GROUT ANNULAR SPACE IN OUTLET CONDUITS BETWEEN THE EXISTING AND
NEW PIPE FILLING FROM THE LOWER END TO THE TOWER END. MULTIPLE
GROUT SUPPLY PIPES WITH VARYING OUTLET LOCATIONS WILL BE NECESSARY
TO ENSURE COMPLETE FILLING OF THE ANNULAR SPACE. CLOSELY MONITOR
GROUT PRESSURES TO ENSURE PROTECTION OF THE DAM EMBANKMENT.
32. GRADED SAND FILTER MEDIA SHALL BE INSTALLED AT THE END OF THE EXISTING
CONDUITS AND BACKFILLED BACK TO PREVIOUS LIMITS.
33. A NEW REINFORCED CONCRETE SLAB SHALL BE CAST AROUND THE NEW 54"
OUTLET CONDUITS IN THE SAME LOCATION AS THE ORIGINAL.
34. REINSTALL PREVIOUSLY REMOVED OR PROVIDE NEW DEBRIS GRATES ON THE
END OF THE NEW 54" OUTLET CONDUITS.
35. ONCE ALL OF THE SHORELINE FORTIFICATIONS, RIP RAP ARMOR, AND BRIDGE 6
REPAIRS HAVE BEEN COMPLETED, THE LAKE LEVEL SHALL BE ALLOWED TO
RETURN TO NORMAL POOL ELEVATION.
36. ANY DAMAGE TO THE EXISTING ROADWAY AND PEDESTRIAN PATH SHALL BE
REPAIRED TO ORIGINAL DESIGN AND SPECIFICATION PRIOR TO VACATING THE
SITE.
37. CLEAN UP AND DEMOBILIZE.
Sheet List Table
Sheet Number
Sheet Title
C1.0
COVER SHEET
C2.0
SITE SURVEY - EXISTING CONDITIONS
C3.0
PROPOSED SITE PLANS
C3.1
SITE ACCESS, STAGING AND AERATION PLAN
C4.0
SECTIONS AND DETAILS
C4.1
ADDITIONAL SECTIONS AND DETAILS
C5.0
EROSION AND SEDIMENT CONTROL PLAN
C5.1
EROSION AND SEDIMENT CONTROL NOTES AND DETAILS
DURHAM COUNTY GENERAL EROSION AND SEDIMENT CONTROL NOTES
1. IF MORE THAN 12,000 SQ. FT. IS DISTURBED A LAND -DISTURBING PERMIT WILL BE
REQUIRED PRIOR TO THE COMMENCEMENT OF ANY LAND -DISTURBING ACTIVITIES.
2. IF MORE THAN 20,000 SQ. FT. IS DISTURBED , A SEDIMENTATION AND EROSION
CONTROL PLAN MUST BE SUBMITTED AND APPROVED PRIOR TO THE ISSUANCE OF A
LAND -DISTURBANCE PERMIT.
3. TREE PROTECTION IS REQUIRED BY THE CITY/ COUNTY PLANNING DEPARTMENT, TREE
PROTECTION CERTIFICATION MUST BE SUBMITTED TO THE DURHAM COUNTY
EROSION CONTROL DIVISION, AND TREE PROTECTION INSPECTION COMPLETED PRIOR
TO LAND -DISTURBANCE PERMIT ISSUANCE.
4. IF AN OFFSITE SPOIL OR BORROW SITE IS UTILIZED, THE DISTURBED AREA MUST BE
INCLUDED IN THE LAND DISTURBANCE PLAN AND PERMIT UNLESS ALREADY
PERMITTED.
5. IF THE DISTURBED AREA EXCEEDS FIVE ACRES, AN IMPROVEMENT SECURITY WILL BE
REQUIRED PRIOR TO LAND -DISTURBING PERMIT ISSUANCE.
DURHAM COUNTY
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A. MORTON THOMAS AND ASSOCIATES, INC.
CONSULTING ENGINEERS
100 GATEWAY CENTRE PARKWAY, SUITE 200
RICHMOND, VA 23235
PHONE [phone]
EMAIL: [e-mail]
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REPAIR NIH DAM
INLETS AND OUTLETS
TASK ORDER C100809
DAM INVENTORY # DURHA 105
FEDERAL NID # NC01666
DURHAM COUNTY, NC
PERMIT SET
NATIONAL INSTITUTES OF HEALTH
111 T.W. ALEXANDER DRIVE
DURHAM, NC 27709
[phone]
MARK DATE
DESCRIPTION
PROJECT NO:
22-0363.001
SCALE:
AS SHOWN
DESIGNED BY:
DAK
DRAWN BY:
KHH
CHECKED BY:
DJR
SHEET TITLE
COVER SHEET
C1.0
SHEET 1 OF
8

1-40
NC-54
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SITE
VIU11V1'1'Y MA1' 1VU'1' '1'U liUALE
60"CMP
1.0' CONC
PARTITION WALL 4"CPP
0.5' LEVEL AND INV=
0.5' CHAMFER 290.87
1.0'CONC
INV=
WALLS FLOOR FLOOR
267 77"
ELEV=267.80' ELEV=267.77'
60"CMP
� N
ROOF 0
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WATER LEVEL IN �! ELEV= � I �,
CHAMBER AT 296 89'
7.00'
283.5' ON
10/01 /20 5.05'
INV=283.95'
36CMp
60"CMP
CALCULATED FROM
PLANS - INV=273.0'
60"CMP
FLOOR &
INV=268.20'
ROOF
ELEV= o
296.83'
7.02'
1.0'CONC INV=284.02'
WALLS
60"CMP
INSET #2
SCALE 1" = 4'
AuIT
SITE
CONTROL - REBAR AND CAP NC GRID
NAD83-2011
A. MORTON THOMAS AND ASSOCIATES, INC.
NAVD88-GEIODI8
CONSULTING ENGINEERS
CONRTOL LOCALIZED
ABOUT CONTROL POINT (CP) #2
100 GATEWAY CENTRE PARKWAY, SUITE 200
CFG
= 0.99992458
RICHMOND, VA 23235
CP
NORTHING
EASTING
ELEVATION
PHONE [phone]
EMAIL: [e-mail]
1
777507.2329'
2037146.9797'
294,59'
2
777290.9834'
2036413.2575'
294.02'
-
3
777444.5461'
2035759.2804'
314.11'
4
776862.9597'
2035535.7808'
325.07'
INLET WEIR=293.03'
INV=284.42'IN
INV=284.34'OUT
293.83'
\I I DI
1 \ �
GRATE=289.91'
CI / RIP/RAF?\\ \� INV=286.68'I1\1 VN
mo 181, \\ \\� INV=284.92'OUT
N RCP \ . 1. \ \ r, \ CB
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NV=290.29'
a.9' 2s\ \\ \ \ \ \ % /\ \\ ► / / / / / / \ \ / / - - u' \ \ c� \ - oNc c�yc pP��
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100
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C' / CP \ CP / )\ \ - - - I \/ 14"DI / - '10 I DESIG/NATICA OST I I I / / / I I s I \
o ; \W.. P- �� /y 1 I I // �/ J // / / / // 11\ CP1 \
WTI \ / I SIGNAL / I J i / / / I \
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INLET
\ LE292.70'°\ %
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� T6P- a i --i i i ice/ \ I I \ 293.71' \ \\ \\\\- Q
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\�� �\ \\ Wd�2.7\ -- - �2//i'= �_EE $FNIED�Y i2g0/ �i'� / \ 1 \ I11l \ x29a.18'\\
\ \\ \ \ \ \ 2gD \ \ \\ 75 - - i / � �-� _ - - ' S' OF'SIJRSY' '/ / i /�-
\ B�F'=11VtE
-I i369 c2 8-Z7=-----____- ,FRglA-PL C' 2g5�
_2g0 �_ B5-j-)UTFJLOW - �_ -J-- -/ x293.8' \ �i���Q�\
\ 3p` \ \ \ \ �2gS\ \ _ = 290�=7NZ2�7t`8c2i79�_ - '-�-�--5 28 - ��, :- _I� FrA1t CONTROL ��i295= \
\ \ ` - -285- S =T - - - - - �� PANEL - TIC UT
- +f4V73.3fl'- - _ - - - - - - - - - - -^--� - -SIB 'I'- 2r - / '
40"CONC / Z7NE-P - T - - - _ - - - -- - 0_ - - - �i IgER oP
SCALE 1" = 8'
INSET #1 ' 1i DI GRATE=284.91'
SCALE 1 = 4 \\ ` p�I�� \ I / / / / / / / / / \ \ \ 80 / \I / INV=282.33'IN
RIM=274.70' I / / \ i / \ 2 _ -�l/
TDROP INLET I \\��\ \\ III\ �� \\ I I / / / / \ J 1 / // I �(\ / -' / �5 \\ / . i / RCP��
0 INV=267.83'&260.32' I \\\ II I I
265.8'x I \ \ I I I I / /// / J / / I I \\\\�\ / \ ��/ -' /
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REPAIR NIH DAM
INLETS AND OUTLETS
TASK ORDER C100809
DAM INVENTORY # DURHA 105
NO VEHICULARTRAFFICORHEAVY ��� e; _ I 27�-31-- -------------- 1--_--- - 2- - F
WALL - - _ `1 - �uTJ���6 _ _ nL - -290- - - - -- - - - - - - - - r= - _ - - - SS 1 -295 �' ; = ' ��� EP �o� , - \ �F�� \�\ \\ FEDERAL NID # NC01666
_ _ _ EQUIPMENT IS PERMITTED ON FIRE LANE - - 2g5-_emu �,- `�-_-_ vu�r - _ - -_- - - � _ -_ _-290_ , _ _ _ _ _ - _ _ -_ _ -=�SsRe� uT
\ \ \�300\ ACCESS DRIVE ADJACENT TO MRI BUILDING - , - =288.5 - _ _ _ - _ � __ -_ -_ -_ J �-� - = 295- - - GRAVEL -- S�-� Ss � ° �,� / vE' /2g5 �' PSP �// - \9S� \ \\ 9 ��\\�� �9� \� \ DURHAM COUNTY, NC
\ 0 �- SLAT DRAIN / /g5 /
/ \ �- - - ` ---=---CAN -;JA- 1M - - 2/ UE
295- � 295- �. �� � /� / o U1 x29a.s1'
.`� --_ - _ -WITH LID --�:- -- _ _-_ --� i SS �E / / \
ao - TRAFFIC / x \ \ \ \
_ - / / 295 1BB SS / \
TE_294.g5 J� _- �--- �----�`---------SEI;-HdSE'F#� -_`--- --- LIG11Tj ASS / / 269.s'\
' P\`� \ _ - ------ ---- _ - �/A`K si SSA 3` SS 15 RCP
A � \ \,1 `�28 \ - - _ - - - - - - - - -Ci7N� P7�U - - -TR- FFfC / _ - 5 B/- EP B / T SIDEW i / / SS SS S�
D RQ 5.35 _ - - LIGHT - _ �1D EP HAL / _ 6 / 269.1' \ \ \ S S RIM=295.50'
/�Oo IRV / AD Y / �� - - - - _ _ WITH RAISABLE METAL _ a _ -295 B� - - RIM=294.04' I I \h / - \ \\\ INV=278.35'OUT
A/ / / BARRA6E3- - - - �� a 295.18' V�EBB _ - _ _ INV=276.85' / I `\ `�� ` \\ \
\ v1 c> �U ---N,ETAL ---- \ \ \
- PROP\AI�E PAD C// / ' / / i EP METAL 95- HH �IDB / - _ _ - - - - - - - . _ / IN INV=276.77'OUT / I I \ \ \ \ \ \\ \ \ \ -
TANKS , / , �A ____-______ /I \ \ \ \ , \\ �9 �o PERMIT SET
- - \ 3 DUX B LAKEVIEW DRIVE - _ _ - -_- - - -_ -_ _ -_ -Zso - \ / I I\ \ \\-,�s�\� \
UTDB 295.59' 295.59' 295.43' 290_
ASP EP HH
-----� N7�,� HALT SIDE U T
of^^-295- 6j1'�=FIEw -295wt UE�- E _ _ '-gym'
41
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���------------ \ 2 S IV'� 73.98 ---_-- - ---- ---_ � L��' _ �__ ---_-- �'' ��/ --- , �\ \ \ \Z \ �90
Z ---- -. - CbNC /INy=27650($)------------ - -- o � _--_' '�3 ` �'' ---'�_ ��----- \ \\ \ \ \ \ \ \ ��\ \�/ /�\\
J ---fN =�8602 PA > \/ �' i ��- `-------290- 90 - '- i ----_ \ \ \ \ \ \ /
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RIP/RAP -- -� /-`-i2a0� --_�---��----� ��\\ \\\\ \\\ \\� \ \ `��
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o DURHAM, NC 27709
[phone]
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INV=284.01' I I I -280��� - - / / ' - \
v,l I I I I ( // / J��/ \/ �^� ---�/ / ��v 1� // �J -_�"
\ \ \ � \ \ ,� � INV, MARK DATE DESCRIPTION
---------� �-1z,"cr -' / �70.0' \ \ `\ \\`\ \
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O / - - _ r - x 271.5' 271.6
271.1'
I I of I I I I I I I / / Q x271.6' /
00
MR/ BUILDING DISCOVERY LAKE ,/
1
II I.I a[l IN/�/ 7 / / _----
IL�- �2 5
Ili I1 I / I / x271.4' �
-275_ I \ 100
, �/ I // // // \ \ _ - -275� 1 \\ \\ / N
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RIM=295.
1 \ ) PROJECT NO: 22-0363.001
INV=27 .19'oUT
I I I I I I I I I I I � x269.7'
\ SCALE: AS SHOWN
NII c0 \ \ \ \ / / l / / / / / i jo / // I I I I I e / / \ / I I / DESIGNED BY: DAK
I I I I / / \ \ I / / / L x269.5' / x271.2 DRAWN BY: KHH
DI INV=286.74' I I I I I \ � I / / / / / i ---'� --- \ --J % � � /
NV-285.4\7' / / \ CERTIFICATE OF GLOBAL POSITIONING SYSTEMS SURVEYS I I CHECKED BY: DJR
GRATE=293.92' 18 RCP �� � \ \ \ I / / / � , i
NOTES: 1, CLINTON B. OSBORNE, CERTIFY THAT THIS PLAT WAS DRAWN UNDER MY SUPERVISION FROM AN SHEET TITLE
` ACTUAL SURVEY MADE UNDER MY SUPERVISION; THAT THE RATIO OF PRECISION AS CALCULATED 1S
1. RAW ERROR OF CLOSURE 1:10,000+, MISCLOSURE WAS 1:10,000+; THAT THE SITE CONTROL SHOWN HEREON WAS ESTABLISHED UNDER MY SUPERVISION FROM
DISTRIBUTED BY COMPASS RULE. AN ACTUAL GPS SURVEY MADE UNDER MY SUPERVISION AND THE FOLLOWING INFORMATION WAS USED
TO PERFORM THE GPS SURVEY: 1) CLASS OF SURVEY CLASS A; 2) POSITIONAL ACCURACY DOES NOTE
2. DISTANCES SHOWN ARE HORIZONTAL GROUND DISTANCES EXCEED 0.10'; 3) TYPE OF GPS FIELD PROCEDURE _STATIC AND RTK _; 4) DATE OF SURVEY
GRAPHIC SCALE UNLESS NOTED OTHERWISE. �9/14/2020 ; 5) DATUM/EPOCH NAD_83(2011); 6) PUBLISHED/FIXED CONTROL __NCGS-VRS__; SITE SURVEY - EXISTING
7)GEIOD MODEL GE10D18; COMBINED GRID FACTOR 0,99992458; 9) UNITS U.S. SURVEY FOOT; AND
ao 0 20 40 80 16o REFERENCES: THAT THIS MAP WAS PREPARED 1N ACCORDANCE WITH THE STANDARDS AND PRACTICE FOR LAND
1. SITE DEVELOPMENT PLANS PROVIDE BY HDR, DATED 1977, AND SURVEYING AS OUTLINED BY THE NC ADMINISTRATION CODE TITLE 21, CHAPTER 56.1607. CONDITIONS
STAMPED "TURNER RECORD DRAWINGS REVISED 7/12/83, WITNESS MY HAND AND OFFICIAL SEAL THIS 13TH DAY OF OCTOBER 2020. i
( IN FEET )
1 inch = 40 ft.
DRAWINGS REFLECT AS -BUILT CONDITIONS".
L-3834 ---------------------------
LICENSE NO. PROFESSIONAL LAND SURVEYOR
C200
SHEET 2 OF
8

,\ \\�\ \\ AUXILIARY SPILLWAY DISCHARGE
\ J / / I I // \ \ \ \ I I I I I \ \ \ I I \ \ f \ \ \\ (NO CHANGE WITH PROJECT)
6 4-g,
2
PROVIDE CLASS B RIPRAP WAVE PROTECTION
ALONG UPSTREAM EMBANKMENT 5 FT ABOVE
\ , \ , _ , - - , - / I \ �- _ AND BELOW NORMAL POOL ELEVATION OF 284.0
END OF
NO VEHICULAR TRAFFIC OR HEAVY
»�X O I EQUIPMENT IS PERMITTED ON FIRE LANE
P I P�`�C�i ' D/� /�� I DESIGNATI ACCESS DRIVE ADJACENT TOMRIBUILDING
\���
_ - / �-�� I SIGNAL , _ _ _ — / \ � � \
P � _
cP C _c %' w : , I /� DEMOLISH SLOPED CONCRETE
�\ I
w 4 "D� - / SLAB FOR SLIP LINING AND
/ RECAST ONCE COMPLETE.
— — _ — 2 70- SLIPLINE EXISTING 60" DIA CMP OUTLET
CONDUIT WITH NEW ASTM D-3350 _ - , \ I I RET
UO _ - - - 54" DIA HDPE DR-32.5 PIPE PROVIDE TRAFFIC \\\ \ \ I \\\\
CONTROL BARRIER 215± FT RETAINING WALL
- - - - -- B-7� --
-275 = --- -- a7 ---- - _— - gjFJ'%� 150±FT 200±FT RIPRAP +
_________— — ------ — 28 , —2 — / _ \ — I VEGETATION r �riirr
-- - - - - - - --------FILTER DRAIN__-(�T------- - , -- "-- _ ---- -_-- --- _ \ I I 100±FT / I / `%11% rriii
_ _ _ _ _ _ - _ _ _ - - f \ / I I PLANTINGS / f� CA ,
-------------------- ---_ —�- — — — - __-_ _ - "__-- —FF�" ( I I\� II I ` I ,VEGETATION \ / ;`�� N,. .R
PLANTINGS
-28 -- _ — 80±FT RIPRAP�-
-- -- ---------- ---- _----- - - - _?g -- --"" - - -" _ I I ��� I III =�9 \_ \\_ = _
— PIEZOMETER LOCATION - B-8 AI#, -' l l \ 040215
�s------------- - _ __---_--¢f - 1 / l VEGETATION \ \ — —) '.9 ':GINE�' �:
2 —— ss `285 �'- — _ _ — _ �/ > ///,�/i/a� 2�
- 85-------------- - �����s-`sS-- — ' - -- ` - --.- / —\\ l / rf� / IIII � PLANTINGS�0
------------ --- —------- �-�s S___— 2g0 _- __ __"'\\\\ I I ((� IIIII I/lj, // �/ \ \� j� v j/iI \ \ '-,,,q. KR\S�,,
_ _ _ _ _ PIEZOMETER LOCATION _ -:- - - - -—�Ss - — —295' % % I 1 1 _ / ��
---------------- - i — — — - -__ �`sS� _ ---'1�' 34±FT RIPRAP I I /
I _
-2g0_ --_-- __--- - --- _ __---_-ems ss S �p' / / \ %��� / _ _ BRIDGE8
I �
- _ gS / / /I 38± FT RETAINING WALL I (NO ANTICIPATED WORK)
—_ -- -- _" - - B-6 _ -- - 5— — — — — RAVEL
_-- _,---- _Zg
-_-_ ---- _-_---�--- _ I —---------- OT DRAIN 34±FT RIPRAP
REPAIR NIHDAM
_ INLETS AND OUTLETS
TRAFFIC
LI �H-T' TASK ORDER C100809
+ 44± FT
DAM INVENTORY# DURHA 105
VEGETATION ) ) / ` \ FEDERAL NID # NC01666
+�B-9 I 11 PLANTINGS
1\\\
\\\
DURHAM COUNTY, NC
-TF�AFF _C ONC PAD Ul
LIE
LIGHTITH RAISABLE METAL _-- \
oU�2 5------,RI**DE BRIDGE 7
O 295.18 BRIDGE 1 (NO ANTICIPATED WORK)
HH /(NO ANTICIPATED WORK)
AuIT
A. MORTON THOMAS AND ASSOCIATES, INC.
CONSULTING ENGINEERS
100 GATEWAY CENTRE PARKWAY, SUITE 200
RICHMOND, VA 23235
PHONE [phone]
EMAIL: [e-mail]
RISER STRUCTURE
CONCRETE
LIE LIE LIE LIEIIJ
-n
�� 41
.....�� Cs�. i:%. �.�. ,�:..
�7. �� �� fir+ I
• 1• r 1 1 1 r Y�
`_ C ?.` �u ■� O Ti ► r ?�
• I i,���' ��•i1r ��r��� D ��!r e`�r ��ier�.� /��'r /mw'r •��=r.�,
G �►��C��II� IDS, ��ja!► �'�,--.�� � ,/� 1'�ti1� O�
.��- I-��- �1�` r I'�- �►— ��� .lye.-� �=sue-� j�=i-� ����-� �� �
-_._-_._-_._-_Nolmdll
I V E
9 HH
x
295.43'
B �IlD — — JTD��U BUT —
UEDB—UL4�UEDB
B � UEDB
SLIPLINE EXISTING 60" DIA CMP INLET
D _ _ — CONDUIT WITH NEW ASTM D-3350 - -
N - - - - --_--------- _-�'' __-- \2 ���� 54" DIA HDPE DR-32.5 PIPE
— — — — — — — — / 2 —
_, — — —280— — — _---
/ ------ - - - - - ---- U,�
— — — — — — _ _ _ _ _ _
SLIPLINE EXISTING 36" DIA CMP LOW LEVEL
n - , DRAIN CONDUIT WITH NEW ASTM D-3350 - - - - - - - - - - -
30" DIA HDPE DR-32.5 PIPE
Ij
PROVIDE CLASS B RIPRAP WAVE PROTECTION -275—
ALONG UPSTREAM EMBANKMENT 5 FT ABOVE
I AND BELOW NORMAL POOL ELEVATION OF 284.0
Ij
♦,♦ ♦♦l ♦♦ / /' /� / / / o /
D ♦♦ I ♦♦ �� / / / '
n�♦� \ ���\ ---------------------- x 270.7'
---------------------
1 PROPOSED SLIP LINE SITE PLAN o 1illillim
0' 20' ao'
J S11111110
CALE: 1"=20'
E
PLANTINGS
GETATION
GS ��\\\ ► I( I I J PERM IT ET
212± FT RIPRAP I All
I II — \\ \ \ 1-1///
40± FT RETAINING WALL
IOU
III\\
72±FT RIPRAP
/ 208± FT
I VEGETATION 21 0± FT RETAINING WALL
--
/ NATIONAL INSTITUTES OF HEALTH
45± FT RIPRAP 1�� \\ \ /f j \\ 111 T.W. ALEXANDER DRIVE
I I / ji III I �R DURHAM, NC 27709
BRIDGE 2 I I �� \\\ \ \ \ / / [phone]
(NO ANTICIPATED WORK) I 115± FT
VEGETATION
I I I ✓ _ ��� I I I I I I PLANTINGS 100± FT RIPRAP MARK DATE
120± FT RIPRAP 118± FT RIPRAP \\\ \\\ \
/ / //I \ / ✓ // BRIDGE 3
/ // ✓/ / (NO ANTICIPATED WORK)
104± FT RETAINING WALL60± FT
VEGETATION \ \\ \ \\\ \\ \\
PLANTINGS \ \\\ \
BRIDGE 6
BRIDGE 5 \
NO ANTICIPATED WORK (SEE SHEET C4.1) PROJECT NO:
( ) \ \ SCALE:
I / BRIDGE 4 f �� I I I / // �/� \\ I I 1 // / /�j/ I I I // DESIGNED BY:
(NO ANTICIPATED WORK) �/ J JI //� \ r \� 11 I I l I �j DRAWN BY:
/ CHECKED BY:
/
SHEET TITLE
DESCRIPTION
22-0363.001
AS SHOWN
DAK
KHH
DJR
\ .VEG.VEG.VEG. SHORELINE REQUIRING AQUATIC VEGETATION PLANTINGSPLANS
/ .RR .RR .RR . SHORELINE REQUIRING RIP RAP INSTALLATION
. RET ■ RET ■ RET .
SHORELINE REQUIRING RETAINING WALL INSTALLATION
SHORELINE FORTIFICATION PLAN 0 150' 300'
C300
a
SCALE: 1 "=150'
SHEET 3 OF 8

NOTES
1. EACH INDIVIDUAL AREA SHOWN BELOW CONTAINS A DESIGNATED ACCESS
PATH(S) THAT WILL BE USED TO ACCESS THE SHORELINE WORK LOCATIONS
FOR SAME AREA.
1 �\ n12. TREE STUMP REMOVAL AND REGRADING TO CREATE A MORE GRADUAL
NO ROAD CLOSURES ARE EXPECTED FOR \ I I I \ \\ \\ _ \ 1 \ / / / SLOPE FOR �ACCESS. PATH SHALL BE RETURNED TO PRE-CONST. CONDITION A. MORTON THOMAS AND ASSOCIATES, INC. DURATION OF PROJECT EXCEPT FOR \ \ \ \ ���) I �\ �� CONSULTING ENGINEERS
MINOR INTERRUPTION DUE TO WORK \ ` ��� � I I , \ l ` / I (MINUS TREE STUMP). 100 GATEWAY CENTRE PARKWAY, SUITE 200
�
VEHICLES AND MATERIAL DELIVERIES. \\ / CONTRACTOR ACCESS A" \ GPI / / 3. GRASSY AREAS SHALL BE MOWED FOR MATERIAL STORAGE AND ACCESS RICHMOND, VA 23235
TO LAKE BED FOR SLIP I // l rD 4. CONTRACTOR SHALL RETURN ALL AREAS TO SIMILAR OR BETTER CONDITIONS PHONE [phone]
1 1 I 1 \ \\\\\ �\ \ \ LINE OPERATIONS \ / I / THAN PRE -CONSTRUCTION CONDITION WHEN WORK IS COMPLETE. EMAIL: [e-mail]
\ I i \ /_ l I D I / 5. CONTRACTOR SHALL COVER THE WALKING PATH WITH RUBBER MATTING
WALKPATH ACCROSS DAM SHALL BE I \ /// I \ \/ \ I I I / WHERE AND WHEN WORK WILL BE OCCURRING.
CLOSED FOR THE DURATION OF PROJECT I I I \\ � 6. CONTRACTOR IS RESPONSIBLE FOR DOCUMENTING EXISTING CONDITIONS
FOR PEDESTRIAN SAFETY. ADEQUATE ` � � � //
SIGNAGE SHALL BE PLACED AT EITHER END.�EQUIPMENT STAGING l \ RELATING TO THE WALKING PATH BEFORE ANY WORK HAS STARTED.
� / \ AND MATERIAL I 1 7. CONTRACTOR SHALL MAINTAIN A MINIMUM 12 FT BUFFER BETWEEN EPA
STORAGE AREAS BUILDINGS AND ALL STORED MATERIALS AND VEHICLES.
AERATION PUMP —�t 1 8. EXISTING PAVED PATHS AROUND EPA BUILDINGS ARE FOR EMERGENCY
— — -�� — ��� TREES IN THIS AREA ACCESS AND MUST REMAIN CLEAR AT ALL TIMES.
AND MANIFOLD
SHALL BE MAINTAINED 9. WITHIN LIMITS PROPERTY ALL STORED MATERIALS MUST BE STORED ON
NO VEHICULAR TRAFFIC OR HEAVY B 3 — \ \ AND PROTECTED GRASSY AREAS AS CLOSE TO TREE LINE AS POSSIBLE.
EQUIPMENT IS PERMITTED ON FIRE LANE - �_�- \ l \ �� I I 10. NON CONSTRUCTION RELATED VEHICLES SHALL UTILIZE CAMPUS PARKING
ACCESS DRIVE ADJACENT TO MRI BUILDING _ � - COFFERDAM I \\ LOTS AS DESIGNATED AND CARPOOL TO AND FROM WORK AREAS BEHIND
EPA BUILDINGS.
�It ■ • I R RET FRET R \\\ \ / / / ) / I I I I I I I \ \
-�• I CONTRACTORCONTRACTOR 3PROVIDE TRAFFIC AREA ACCESS PATH "D"
PARKING CONTROL BARRIER l II I1�y 1
*.,`\ CONTRACTOR ACCESS C �-
\\I \
I \
\l •.010% , r i r r
rrrr'/Vx\ %*-\% TO LAKE BED FOR SLIP N CAR
''•
k ` .. LINE OPERATIONS _ \�� 1Elf•.-,�
CONTRACTOR ACCESS "B" - �� , - _ �/ 5 / I / I /�� I I I I \ 1 \ I ` 2 �� •:7
SEAL
TO LAKE BED FOR SLIP 1 \\ ` I �� . l I I I I I I ) _ _
040215
LINE OPERATIONS BRIDGE 8
J 2 ��-
I � � J / I / ( I I I II \ \ \ � /I/ � I I I I \\ \ ( � � ► \ � ATED WORK) NO ANTICIPATED
AREA #2 \ , ,,�,70
'CONTRACTOR
I\\ � .,,rq l �11
Klow%
7 ACCESS PATH "F",.
ACCESS PATH I I ► ; 1 / I \ 1 l� I \ \ _ I I \ \ \\ \ \ I I \ 1 1 I I
— CONTRACTOR��
NIH ENTRANCE \ \ \ \ I I I I _ — / ) ) ) I 1 1 /�/.�J /` �� : ► ; ; \ I �/ i — �� ACCESS PATH E
\\\\ \ \\
REPAIR NIH DAM
PORTIONS OF WALK PATH SHALL BE ,� II l llI ` 1
� ' � 'I �
CLOSED AS REQUIRED FOR CONSTRUCTION
INLETS AND OUTLETS
l \\ \ \ \ \ \ \ I OF SHORELINE MEASURES 3 TASK ORDER C100809
\ \\\\ \ \ \\ \\ \ 1 DAM INVENTORY D RHA 1 05
\ 1 \ \\\ \ \ \ / / / / I III ; ; v CONTRACTOR II O \\ I \ \\\\ \ III % I FEDERAL NID # NC01666
O\ \ ,0 lI ACCESS PATH G
DURHAM COUNTY, NC
IV
CONTRACTOR
I THE CONTRACTOR SHALL RESTORE ALL ACCESS
ACCESS PATH "J" PORTIONS OF WALKPATH / /
I ATHS BACK TO ORIGINACONDITIONS
III I II ��
II
PERMIT SET
\ SHALL BE CLOSED AS
/ ---. \ \ \ , I I 1 I I —/\\ \ I I \_ I� , , ►+ ; REQUIRED FOR SHORELINE I l l \ \ \ \\\\ I
O ; STABILIZATION ACTIVITIES
\\ BRIDGE
(NO AN/TICIPATED WORK) / BRIDGE 7
SUPPLY TUBING (TYP)
(NO ANTICIPATED WORK)
NATIONAL INSTITUTES OF HEALTH
ARE\A\#3�\ _3 L
111 T.W. ALEXANDER DRIVE
//,BRIDGE 2 DU2N09
(984) 84382(NO ANTICIPATED WORK) \
APPROXIMATE LOCATION OF
AERATION DIFFUSER (TYP OF 10)
CONTRACTOR MARK DATE
ACCESS PATH H
zz ► I l I I I \
BRIDGE 3
(NO ANTICIPATED WORK)
CONTRACTOR
��
ACCESS PATH K
AREA
n
/BRIDGES
(NO ANTICIPATED WORK)
PROJECT NO:
BRIDGE 6 \ \ \� - \ \ \ I SCALE:
DESIGNED BY:
�— I I \ \
�� \ \ I \ I I / / / // / \ \ /// / \ / / % / / / /� ► / / \\ \ 1 /// \\\ \ (SEE SH EET C4.1) 1 \ \ / \\ \ \ \
DRAWN BY:
BRIDGE
J r CHECKED BY:
(NO ANTICIPATE�WORK) , \\ I I / ///, l� // — — _ �� \\\I l // / l I I SHEET TITLE
3
DESCRIPTION
22-0363.001
AS SHOWN
DAK
KHH
DJR
SITE ACCESS, STAGING
�� \�\�� ^\\\\\� J I II�� -�\\�\ \\� /////jj f �//�-�//��//l/ � � \-- �✓/ �� �\ 111 /,/i �i _-\\\\\\�J� � � \ \\\ \
AND AERATION PLAN
„
EXISTING ACCESS PATH L„ .
NO TREES WILL NEED TO
BE REMOVED HERE.
\\,_
1 PROPOSED SLIP LINE SITE PLAN o 100' 200'
J_ ■
SCALE: 1 "=100'
K SHEET 4 OF 8

0
0
cvi
M
O
i
N
0
m
U)
z
Q
U)
_
U
X
31
310
STEEL GRATES SHALL BE PRESERVED AND MODIFIED
EXISTING CONCRETE RISER GUARD RAIL
UNDERGROUND
AS NECESSARY TO BE REINSTALLED ON END OF NEW
GRAVEL SLOT DRAIN PAVED ROAD
ELECTRIC EL. N/A
30
OUTLET PIPES SIMILAR TO EXISTING CONDITION.
300
DEMOLISH AND RECAST
SEE ENLARGED DETAIL 4
SLOPED CONCRETE SLAB
EXISTING GRADE
PROPOSED WAVE PROTECT ON
GUARD RAIL SEE DETAIL
A. MORTON THOMAS AND ASSOCIATES, INC.
29
AROUND NEW OUTLET PIPES
UNDERGROUND
—
NORMAL POOL 290
CONSULTING ENGINEERS
PROPOSED SAND
CONC. SIDE WALL
I — —
i —
'�--
— _ _
- -
284.00
100 GATEWAY CENTRE PARKWAY, SUITE 200
RICHMOND, VA23235
FILTER DIAPHRAGM.
- - - -
15" RCP SS 60" CMP — —
- - - - - - - - __ _
_
0
PHONE [phone]
28
CONC. SILL SEE DETAIL
INV. 275.07 INV. 284.0 DE D
_ _
— — — — — —
— — — — — — — 280
EMAIL: [e-mail]
CATHODIC
�__
(CALC) 60" CMP I TELEPHONE EL. N/
- - - - - - -
- - - -
LINE EL. N/A _.
------
INV. 267.77
----
27
____---------
J
--------
LOW LEVEL RAIN VALVE INSIDE EXISTING 60" CMP INLET CONDUIT
60 CMP
CONCRETE R
I~ EXISTING OUTLET CONDUIT SHALL BE 36" CMP
SER TO REMAIN PROPOSED SLIP LINE WITH ASTM D-3350
54" HDPE DR-32.5 PIPE
EXISTING 3 " CMP LOW LEVEL DRAIN INV. 272.95
26
etJT AND REMO
WATERLINE 60" CMP OUTLET CONDUIT
TO TNIS POINT
EXISTING ��
INV. 271.35
PROPOSED SLIP LINE WITH ASTM D-3350
FLANGE OR
LOW
CONDUIT ROPOSED SLIP LINE WITH �� GIVIP260
INV. 273.0
ASTM D-3 50 30" HDPE DR-32.5 PIPE
cmc
EL. N/A INV. 266.95
„
54 HDPE DR-32.5 PIPE TRANSITION
� � Indian � � � , �
25
250
0+00
1+00
2+00
3+00 3+50
PROFILE THROUGH
DAM
OF PROPOSED SLIP LINE
0
15, 30'
1 "=15'
SCALE: 1
```+++++�����,,,��'
N CAR
\ \ 3
W�
J W�� w / W— W— w
PORTION OF EXISTING 60" CMP OUTLET EXISTING GRADE
PIPE TO BE REMOVED (APPROX. 20 FT) \/\/\ /\/�
I
/ %
STEEL GRATES SHALL BE PRESERVED AND MODIFIED
AS NECESSARY TO BE REINSTALLED ON END OF NEW
/ /�- . / / �/,
S� •. ,,��
OUTLET PIPES SIMILAR TO EXISTING CONDITION.
a \//\//
�- -
9 •.y
/
:.. .
¢ SEAL
/
040215
i
WWF 6 x 6 - W2.1 x W2.1
....::
GROUTIPLUG AT END OF
CONC. SIDE WALL
PROVIDE RODENT GUARD.
j Z.::...
AT END OF EACH FILTER `�' I
SLIP-LI E (2 FT LONG)
I
�-.
% �9 • G2�
/ . . ••
DRAIN' DIDG �TgET�l
DEMOLISH AND RECAST O
•
�� �`
— — —
/
I
SLOPED CONCRETE SLAB
PROPOSED SAND
SKEW CUT END OF
CONC. SILL PIPE AS SHOWN.
.vo _
I/./`
AROUND NEW OUTLET PIPES
1/8"/FT SLOPE— z
FILTER DIAPHRAGM.
1
_
(ASTM C-33 FINE
o
—
—
AGGREGATE)
6"DRAINS EXISTING BOTTOM
a SLAB TO REMAIN
/ on..8
....... .... '
REPAIR N I H DAM
EXTEND HDPE SLIP LINE TO � — —
T H E SAME A P P R OX POINT AS
� - - - � =
a
o 0 0�
�
\ \ \
\ //\
�, .. _. .:. .._.
/\ \ \ \ \\ \ \ \ 4�-0�� .MI'N
/ / / / //
_.
INLETS AND OUTLETS
THE EXISTING CONDUITS.
\
\�\\�\\/\\/\\� \\/ -\f \ /\ /`
TASK ORDER C100809
DAM INVENTORY # DURHA 105
\ \ \ \ \\ \\ \\\\/\\/\\/\\/\\/\\/\\/\\/\\/\\/\\/\\/\ \\/\\\ice\\\\\\\\\\\\�\\�\\�\\.
/, //i ////� � /� /� /� / /\ \ /,
\\\/\\/\\/\\/\\//\\//\\//\\ j\\��
//\//� //
-
12" LONG #5 REBAR DOWEL, DRILLED AND
COLD JOINT BETWEEN EXISTING ��
NEW 54 HDPE DR-32.5
/
EXISTING OUTLET CONDUIT SHALL BE
EOST NG PIPE
FEDERAL NID # NC01666
- -
- - - -
- - - - -
GROUTED 6" INTO EXISTING SLAB AT 18"
AND NEW CONCRETE SLABS SLIP LINE OUTLET PIPE
DURHAM COUNTY, NC
SPACING PRIOR TO CASTING OF NEW SLAB
CUT AND REMOVED TO THIS POINT
I
SLIP LINE AND GRADED FILTER DETAIL AT END OF OUTLET CONDUITS
3 SCALE:
1 /2" - 1'-0"
II
/ - -
EXISTING 60" DIA CMP
EXISTING
60"
DIA CMP PROPOSED 54"
HDPE
I
II I /
I I
..:.'it / \/ PROPOSED 54" HDPE
-
SLIP LINE PIPE
4" SOLID PVC 4"
#67 STONE
PERMIT SET
VA
4"DIA SOLID PVC
- - -
SLIP LINE PIPE
DRAIN PIPE
ALL SIDES
-
o
4 DIA PERFORATED
PVC WITH ENDCAP I
_
'n PROPOSED SAND
-
9 FILTER DIAPHRAGM -
I
I
/ -
\
�//
\/
/
_::
�' +
':. -
2 -0 ;
GROUT PLUG AT END OF
, - 2 G
SLIP LINE ( FT LONG)
//
�.::':=;:
//�
....::AST:M.C-am. FINE
AGGREG ATE
Ti
>>
-
+I -
-
-
o
I —
- /
=
- - — — — /
/
//
\
` \
/
\ /
=°`
:�
REVISED
NORMAL p
— ,
ELEV. - 28
UT AND REMOVE PORTION NEW 54"
CIA HDPE SLIPLINE PIPE. CUT FLUSH
/
\/
':
/ .
\/\
NATIONAL INSTITUTES OF HEALTH
111 T.W. ALEXANDER DRIVE
_ _
\
WITH INSIDE CONCRETE SURFACE
\
DURHAM, NC 27709
_
[phone]
\
EL. 284.4
EL. 284.0
/\
\
EXISTING
NORMAL POOL
MARK
DATE
DESCRIPTION
REMOVE EXISTING
- - -
- _ - _
REMOVE EXISTING
/
/
ELEV. = 284.0
V.
\
\
\
CONDUIT BACK TO
THIS POINT
CONDUIT BACK TO
THIS POINT
:�4"
PERFORATED
\/
t..."
\
PVC DRAIN PIPE
SECTION A -A'
OUTLET STRUCTURE AND SAND FILTER
2
PLAN
SLIPLINE
MODIFICATION DETAIL
INSIDE PRINCIPAL SPILLWAY RISER
FILTER DRAIN DETAIL
5
4 SCALE:
1/2" - 1'-0"
1/4" = 1'-0'
SCALE: 2" - 1'-0"
GASKET
PROJECT NO: 22-0363.001
SCALE: AS SHOWN
DESIGNED BY: DAK
DRAWN BY: KHH
CHECKED BY: DJR
SHEET TITLE
SECTIONS AND DETAILS
"SNAP-TITE°" PROPIETARY
"SNAP-TITE°" WATER
HDPE PIPE TIGHT JOINT WITH GASKET
PIPE JOINT DETAIL
C400
6
NTS
SHEET 5 OF 8

0
co
coco
0
N
SN
0
m
U)
z
Q
U)
it
_
U
X
NOMINAL TOP OF WALL NOTE: ANY UNSUITABLE MATERIAL SUBGRADE SHALL BE 12" TO 36" TO
* FINISH GRADE OF RIPRAP SHALL EXISTING GRADE
ELEV. 286.0 UNDERCUT AND REFILLED OR BRIDGED WITH STONE. MATCH RETAINING
MATCH EXISTING SLOPE BUT
1'-0" MIN WALL HEIGHT
MASONRY MORTAR STACKED NATURAL STONE NOMINAL TOP OF WALL
SHALL
NOT BE STEEPER THAN 1:1 PLACE GEOTEXTILE
FABRIC UNDER RIPRAP
WETLAND ZONES AND SPECIES
(ASTM C270, TYPE N) IN RUNNING PATTERN ELEV. 286.0
18" LAYER OF NCDOT
DEEP POOL
MASONRY MORTAR
CLASS B RIPRAP
/\\�
QTY TYPE
72 NUPHAR ADVENA (SPATTERDOCK)
HIGH WATER: Landward
(ASTM C2710, TYPE N)
////�//
72 NYPHAEA ODORATA (WHITE WATER LILY)
shift of plant communities
A. MORTON THOMAS AND ASSOCIATES, INC.
CONSULTING ENGINEERS
_ /\/\/\ \ \
m / \
p
�C
/ ///
/\/\//\�
SHALLOW WATER
LOW 1NATER: Lakeward shift of plant communities
100 GATEWAY CENTRE PARKWAY SUITE 200
NORMAL POOL > NORMAL POOL // ///,�, ,, 1
ELEV. 284.4 ELEV. 284.4 10 \/
N
NORMAL POOL 1
ELEV. 284.4
//��\�//\�
\/\\/
QTY TYPE
287 PELTANDRA VIRGINICA (ARROW ARUM) UPLANDS
', SHRUB WET MEADOW EMERGENT MARSH AQUATIC
RICHMOND, VA 23235
PHONE [phone]
o /\\
m
\�
//�
Woad shrubs
I Shrubs Sedges Emergent perennials Floatin leaved&
p
EMAIL: [e-mail]
//
288 PONTEDERIA CORDATA (PICKEREL WEED) Trees
Vines Graces submersed plants
-
sedges : Rushes '
SHALLOW LAND Herbs
/\/\/\/\/\/
QTY TYPE F �
/\\
cv
\\/
192 ASCLEPIAS INCARNATA (SWAMP MILKWEED)
191 EUPATORIUM PERFOLIATUM
li STACKED NATURAL STONE
/ / / /
(BONESET),
192 LOBELIA CARDINALIS ( CARDINAL FLOWER) 'JIYio �
II II II
a .� � � � � � IN RUNNING PATTERN AT \ \ o
\ \
J N
1:10 BATTER
o \\ \
/////\///\\ \\//\\�\�
WATER'S EDGE ` ` '-
QTY TYPE
( ' {r 1 _ Hi h waterc
i fi 1�� NORMAL
M
\
\\ \\ \ SOIL OR STONE
/ /\/\� \� \\�
/ //\/
191 CAREX CRINITA (FRINGED SEDGE)An
_ d'.i'..,
Low Water
Amnrican Indian ' " ' '
CONCRETE RETAINING BACKFILL
#4 x 12" LONG REBAR 21-011
\\
,\\��� END AS REQUIRED TO
192 IRIS VERSICOLOR (HARLEQUIN BLUEFLAG
192 JUNCOS EFFUSUS (SOFT RUSH)
��
WALL FOUNDATION DOWEL AS REQ'D FOR #4 x 12 LONG REBAR
ESTABLISH A �� ' MATCH SHORELINE SLOPE AND
ELEVATION STABILITY CONCRETE RETAINING DOWEL AS REQ'D
BENCH
FOR RIPRAP REACH BELOW WATER LEVEL
WALL FOUNDATION FOR STABILITY
RETAINING WALL FORTIFICATION DETAIL
RIPRAP FORTIFICATION DETAIL
VEGETATIVE FORTIFICATION
1 SECTION
2
NOT TO SCALE
3
NOT TO SCALE
GROUND LEVEL
EXISTING 60" CMP PIPE NEW
54" HDPE DR-32.5
'%�� � a a
;x
%%I�ir�fit
\CA/�
SLIP LINED PIPE
6" THICK CONCRETE PAD �
\J /
♦♦.`
'
`
,r• S/ '• �'
,+
'
11
18 THICK CLASS B RIP RAP 5 FT
�±{
1t`JY,,.JnJ."ii�t^t'F ..r19.•
�::f.� h=��= .�
��
II
EXISTING 36 CMP PIPE
„
12 ALUMINUM LOCKING WELL
K
- ¢ SEAL 9<I
EXISTING GROUND ABOVE AND 5 FT BELOW
.4 zr.
:�'=
NEW 30 HDPE
DR-32.5
CAP (ROYER #12LC OR EQUAL)
= -
= 040215 =
NORMAL POOL ELEVATION
t
aAY
-s}'a'•s e
SLIP LINED PIPE
II
6 PVC SCHEDULE 80 PIPE
.
/\
�< `�'
4��'• '°�.: =� �a-'; xJN
;�g9�2P3*1-
./ � . , GIN Gj ♦.
\� \
n
h;ba.
2" DIA. SCH 40 PVC PIPELL
/', q. RCS �`♦
NORMAL POOL,
�
�:
:y.
BENTONITE CEMENT GROUT
84.4
��` °��
��� .,��
mF '
EXTEND TO 5 FT BELOW
GROUND SURFACE
LL
'y
B E NTO N ITE ANNULAR SEAL
REPAIR N I H DAM
`^
-Y�
W
`s:.
///////
�.\�\�\�\�\�\�\�\�\�\�\
x^
.�.y���
��
611 MINIMUM BORE HOLE
INLETS AND OUTLETS
PROVIDE NCDOT TYPE 2
� \ � � � � � � � � � �
>' //�/
;•��
k;'-: �:_:�:� �"�.�.•.
TASK ORDERC100809
GEOTEXTILE FABRIC LINER / / / / / / / / / / / / / / / /
/\\////\\//\\//\\//\\//\\//\\//\\//\\/
FILLER SAND
DAM INVENTORY# DURHA 105
GROUT ANNULAR SPACE
2 DIA SCH 40 PVC WELL SCREEN
FEDERAL NID # NC01666
WITH NON -SHRINK
(0.010 INCH SLOT WIDTH)
DURHAM COUNTY, NC
CEMENT GROUT
WELL SCREEN BOTTOM ELEVATION
PROPOSED UPSTREAM WAVE PROTECTION DETAIL
SLIP LINE DETAILS
PIEZOMETER
6
4
S
1/4" = 1'-0'
SCALE: 3/4" - V-0"
NOT TO SCALE
NOTE: USE MIN 3000 PSI CONCRETE FOR CAST IN PLACE
NOTE: USE MIN 3000 PSI MIX DESIGN FOR FLOWABLE FILL APPLICATIONS
STRUCTURES. SAME MIX DESIGN SHALL BE USED FOR FLOWABLE FILL
SANDBAGS OR STANDARD
USING SANDBAGS OR STANDARDS FORMWORK.
PERMIT SET
APPLICATIONS
USING FORMWORK.
EXISTING BRIDGE ABUTMENT
MATCH TOP OF
(GEOMETRY AND DIMENSIONS
4" DIA. SOLID PVC
1'-0" RETAINING WALL TO TOP
SHALL BE FIELD VERIFIED)
1/4" STAINLESS WASHER
OF EXISTING ABUTMENT
EDGE OF WATER
• �.•
BRIDGE DECK
#5 REBAR
(SPA @ 10" O.C.) >
\\
BRIDGE BEAM
CL #5 REBAR @ o
/
1
NATIONAL INSTITUTES OF HEALTH
15°MIN
8
\\\
10" MAX SPA. U_
/\\
/
+i
MIN
111 T.W. ALEXANDER DRIVE
DURHAM, INC 27709
C4.1 0
/ /
%\\
�. <. FORM USING
SANDBAGS OR
[phone]
NOTE.
ONCE LAKE LEVEL IS LOWERED AND
/\
SEE NOTE
\
a ..a.... . STD FORMWORK
/
MARK
DATE
DESCRIPTION
FOUNDATIONS ARE EXPOSED
�j\
// /� /
PROPOSED CONCRETE RETAINING WALL CONTRACTOR SHALL PERFORM FIELD
SHOWN FOR NORTH END OF WESTERN VERIFICATION EXISTING CONDITIONS
o " . ��:.
FORM USING
\\
POTENTIAL �XIST P��� ,\�j� ��'
1/4" STAINLESS STEEL BOLT
„
(MIN 6 LONG)
ABUTMENT. OTHER LOCATIONS SHALL AND REPORT FINDINGS TO ENGINEER
\\/%\� \ / `, SANDBAGS
OR
GROUND LINE
1 STAINLESS
SEE NOTE �\ ,\\/
/ 4" NUT AND WASHER
BE ADDED BASED ON FIELD
POTENTIAL EXISTING STD FORMWORK
\
CONDITIONS AND BUILT ACCORDING
\\ \
GROUND LINE
TO DETAILS SHOWN HEREIN. �'�
!
DGE 6 RETAINING WALL SECTION
BRIDGE 6 EROSION REPAIR DETAIL
RODENT GUARD
V
9
1
I�
1'-0"
NOT TO
SCALE
NOT TO SCALE
tJJ ��•`'t
,r
- - _ i,.,
`.r.
•
- ''.mil _'3:: . , .r,• -
-
'4
- ' � --
J
r�
f •s
a wY
•r ,
,:
PROJECT NO: 22-0363.001
PLACE GROUT OR FLbU�/46�fL=,I:�;
r
-
�` + f: ` ::�� _ - < • . i =� . '- - i -_
•.I.
r
�, -
SCALE: AS SHOWN
ERODED AND UNDERIV�•G .tb-,4�FA A
:�
-
DESIGNED BY: DAK
'
TO STABILIZE ABUTMENTS D�: -,
r _
- 1t
_ ' S•
_
J
- <
-_
.;:
DRAWN BY: KHH
PROVIDE TABLE F I�`C3 •T' `IV•=�f�-R=
f -'
---
RETAINING WALLAS N�E1TT//
•+, 'ti: fI
t •I_
_ ,.
-
-
-
CHECKED BY: DJR
,�� _ _
\
-
SHEET TITLE
r'—
ADDITIONAL SECTIONS
AND DETAILS
'
EXISTING BRIDGE 6 ------ -- EXISTING BRIDGE 6
WEST ABUTMENT EAST ABUTMENT
SANDBAGS OR CONDENSATE PIPE
STANDARD FORMING SUSPENDED FROM BRIDGE
BRIDGE 6 PLAN FIELD VERIFY ALL DIMENSIONS
7
3/8 = 1 -0
SHEET 6 OF 8

1, \ 1
.VEG0VEG0VEG. SHORELINE REQUIRING AQUATIC VEGETATION PLANTINGS 1 l // / STAGING AND STOCKPILE AREAS
AREA A = 0.54 ACRES (SEE NOTE)
264.9 \ \ MRR ORR ORR ) ( / ///� / (�� AREA B = 0.50 ACRES (SEE NOTE)
SHORELINE REQUIRING RIP RAP INSTALLATION `
\ \ \ \ \ \ I ( SF / AREA C = 0.50 ACRES (LAKE PERIMETER)
\ / l s•- \ \ i
�\\\\\ \ .RET0RET0RET.X/ SHORELINE REiQUIRING RETAINING WALL INSTALLATION
I I I
111C -n—
NOTE: INDIVIDUAL TREES IN THESE
SF / I \\ \ I I \ AREA CE /
� / � \ \ � _� / = AREAS SHALL BE PROTECTED ACCORDING A. MORTON THOMAS AND ASSOCIATES, INC.
_) —%��/ TO SECTION 6.05 OF THE NC EROSION CONSULTING ENGINEERS
/ ` \� OTHER DISTURBED AREAS — — - 100 GATEWAY CENTRE PARKWAY, SUITE 200
\ \ I \ — — , — — / I 1 -1 _ _ °,w— �— / / / 1\\ AREA D = 0.31 ACRES = CONCRETE WASHOUT ° AND SEDIMENT CONTROL PLANNING
/ Q — X�r / / _ — CW =� AND DESIGN MANUAL RICHMO80 ) 2 -6231
CP CP °O� - X� / 'AREA E - 0.26 ACRES \ PHONE [phone]
\ / _ I \ I I /— c F �j EP X-I� / / - — ` \\\\\ \ EMAIL: [e-mail]
_J cP / w�X� / I END 0 / �� _ _ — _ _ AREAB
/ L , I I . — — »�X� I CE PS CONTRACTOR SHALL ENSURE
���1_�c= TREES IN THIS AREA ARE
\ \ SF �� I- -I ° V DESIGNATI
/— \ P�X��`� 1 4 D� ,rL I / �� I I — AREA D — °D` PROTECTED FROM DAMAGE
- - �L // I I \ I LOD boy TP
CP _ C _ w W / SOD
I / 1
_ w� �w� w x� �oD/ I I ` \ 1 I I I AREA E l
\ I LoD — \ / -- \ I A` J X -X I \\ \
1 4 D — — — — — — — — OP —o LOD— =',;__--_-_-_-_-_-----------womw
\\\ \ \ \\
4t
— — — -2� PROVIDE PERMANENT SEEDING FOR ALL
\ — — 2 70 _ _ _ — P — — — — — — _— _� \ \\\ III DENUDED AREAS AROUND LAKE AFTER
_ S aCONSTRUCT TLET PROTECTION I \ \ S F
UO o� OUTLET _ _ _ �� / _ \ I \ \ III COMPLETION OF SHORELINE FORTIFICATION. PS
-4 ------------ I ��`�' ACROSS — � / \ '— \ \ , ♦ I\
_4— __ _ ISF x—
I I
-5- ---- -- _ - - 5'
------------------ __---- �T------- - - j iL -\\ ♦♦��Illi�rrr,rr'
---------------- ___—��------- — _ _ — PROVIDE PERMANENT SEEDING __ ;, j \ =1I I / ; ; ' / PS / \\\ \ ��\ \\ �.`♦ NCAR
-------------- _ FOR ALL DENUDED AREAS _ - _ — \\ f S%.
_ -
------------------ — ------ — — --- — ---- _2gO _ — \ 1 I II �� ► , , ; PROVIDEAGAP INSILT
BRIDGE8 ¢ SEAL
—ss— ----- -----------_— — — — — 2g5 _ -- - —_ --- ''— � / / � I J i =_ �j �/� %� PS � � � ; � ; (r / = FENCE FOR ACCESS (NO ANTICIPATED WORK) 040215 -
- — _ — — _ _ — — _ _ — , — — / / /n % /� c ' I CONSTRUCTION ACCESS / i -
----- ���5---•`SS_- _285- _ fir,= - __ _ - �--____-- _ — — __- � �_ � _-`�B-8AI#,- /// / _ � = 111 / �% • JF i i ; ' i / � 2 :'
285— — ——�5���_ --- — �— _ ___-- _ — / // j �� %I/ l/ / :x ; p I I / _ = O ;9� �N ,�o
--------------- _-__S _ o_ \ --_ — �/ /111 / II _ = ��s��.
s--- 9
--------------- ------ sue. �___- _ - I / \ / // I r i i ', / / ''rrrriillll �♦
5
---------------------, - - — — - --==-ss—�SS==---�5�, — -Zg
— —290— - _ _ _ _ - - - Ss maser=
-_-_ —--------_ - --------- -- --- ---__ - --_ _ — —SS
----------------- =- -_ B-6 ___ - 95 -,,,--
------------------- - _ REPAIR NIH DAM
---- INLETS AND OUTLETS
------------------ __ TASK ORDER C100809
- - - - - + - - - , , / % % _ _ = / / I \ \� \ \ DAM INVENTORY # DURHA 105
_ - o _ _ _ FEDERAL NID # NC01666
- — — — — — — 5 B-9 !EP I BRIDGE 1 / PS DURHAM COUNTY NC
_ _
------------------- J _ _ � (NO ANTICIPATED WORK)
UE. LIE
_____---- o� a —2 5 O
B3 _ — — —° — 29518' \31DB �� �— \ •'\ I
° H H G� / E�� /�i _ �j �/ BRIDGE 7 ; ► f . All
METAL 295 ° / /
/���8 / r — ii /_ �'J (NO ANTICIPATED WORK) �; SF / I I
\3jD EDB I I I I �/ ;
PERMIT SET
_ 8�-�-� ED l / / /—
I V� — T DBE`' i / / / S FDB -
9' 295.43 — uEDB _ -- _—_ I / B Ps} // /� _� b I \ �\
U B—UTPs
D��UTllt3— '
B�UEDB � -
UEDB UEDB
—��/BRIDGE2
_ ---� i--'_ .—oo� I I I // ��(NOANTICIPATEDWORK)ll II `.X _ �\
B- _ _ _ _ _ , `�—X _� �\ \_� NATIONAL INSTITUTES OF HEALTH
------------------ — ---@ — __-- __ --- __ — i °°� l I '/ / I I I 111 \\\ \ \ \= 111 T.W. ALEXANDER DRIVE
- --�--- ---- ---- — — — l /l I
i ° _ _ _ _ _ _ � _ _ _ — — _ �� / � / / ' / / I� \ � \ \ \ DURHAM, NC 27709
'° — — — — \ [phone]
— — — — — — — — — — — — — — — — — — — — — — — — — — - —
I I \ I I / -�\ X \ MARK DATE DESCRIPTION
O J �(
D— — — — — — — — — — — — — — — — — — —29 _g _i o — _ '�oD�� I �/ / 1 \ ✓/J BRIDGE3 / X
-----------------— _—-1 _
_ �pO ' / / / // � ✓ � (NO ANTICIPATED WORK)
i _
j — dO1-401�01 °01�401 uvi■ _ `LOD! i''' _ _ i �' i2vo / // _ \�� // / I / / / / �/ / // /� P
— — _ / ' ' , / _ LAKE PERIMETER FORTIFICATION DISTURBED AREA
I I i BRIDGE 4
— _ �� — \ / _—, I \(ASSUMED8FTWIDEX2400LF)=0.50AC I I NO ANTICIPATED WORK
CLOD. �LOO _ J
— — — — �� oD� - 2 / (ACCESS PATHS AS SHOWN ON SHEET 3.1 WITH ( ) \\\ \ \\\ \
_ _ ASSUMED 12 FT WIDTH) = 0.27 AC
CLOD` .�
___--_ PROVIDE SILT FENCE AS -280— — — — — - --- - ��\ /�� — _ — TOTAL AREA C=0.77ACRES ' J // ///� / / \
D �REQUIREDAROUNDSLIP ---_-- — — ---- --\ SF / ��� / �� / ////_�/� // '� \ \ 1 1 BREFDERETOSOW
n LINING OPERATIONS _ `'� °��� / _ _ —�/� / / \\ \ 1 BRIDGE 5 \ � ( )
-------- — — — — — mi \ / _/ //' /%/ (NO ANTICIPATED WORK)\\
n — _ ��� / EROSION CONTROL LEGEND // / 1 l / J L
n ' — — — — _ CONNECT BYPASS WITH SANDBAGS — — �n — — — D / / TITLE KEY SYMBOL STD QUANTITY
SF i FROM 12" PIPE TO INLET OF LOW — — z _ — - / NUMBER \ \ I /
— — _ — / �- \ �� l I I III / \ \ / / // / PROJECT NO: 22-0363.001
LEVEL DRAIN \ _ — _ ° j0 LIMITS OF DISTURBANCE 2.38 ACRES
_ �_� SCALE: AS SHOWN
Ln
PROVIDE TEMPORARY 12 PIPE AND J O / TREE PROTECTION TP 6.05 1200 L.F. _ / 1 \ _ / \ / / / DESIGNED BY: DAK
I f ( / 1 )I\\ l ( / / /� \\\\\ / // = DRAWN BY: KHH
VALVE THROUGH EMBANKMENT Q —� / C \
` I FOR DAILY FLOW - o CONSTRUCTION ENTRANCE CE 6.06 3500 L.F. �/ I / \ `\ // CHECKED BY: DJR
_ r
j ` % I / / / / /— I I \ ` I III 1 / // SHEET TITLE
n SILT FENCE $F X X 6.62 3500 L.F.
♦ I . ♦ / / PERMANENT SEEDING/SOD p$ 6.11 1.5 ACRES
EROSION AND SEDIMENT
♦�`I ���,, ` LOD _ CLOD LOD— PROVIDE COFFERDAM UP TO//
k `� '1 x� / ' •" ELEVATION 275.0 TO RESTRICT OUTLET PROTECTION OP SHEET C5.1 \ % / V/ \ \ ` / I CONTROL PLAN
--------------APPROX. 190 FT FLOW FROM WORK AREA
( CW SHEET C5.1 \ I I ✓ / \ \ I
� ♦♦I `\ `� \ �� _______________ \ (ESTIMATED 230 FT LONG) _ _ CONCRETE WASHOUT O
n 7♦ ♦,,-7------------------ x 270.7'
♦ 1`_------------ \ I \ \ I I I
0 10' 20' 40' 0 150' 300'
1 PROPOSED SLIP LINE SITE PLAN 2 SHORELINE FORTIFICATION PLAN
J_ SCALE: 1 "=20' SCALE: 1 "=150'
K SHEET 7 OF 8

7
D
J
>_
E
i
i
)0
v
D
v
A
D
h
V
DI
J
NOTES:
0, RAILROAD BALLAST OR SURGE STONE SHALL
BE USED. PAD TO BE 50'L X 20'W X 6"
D AT A MINIMUM.
b. TURNING RADIUS SUFFICIENT TO
ACCOMMODATE LARGE TRUCKS IS TO BE
PROVIDED.
c. ENTRANCE(S) SHOULD BE LOCATED TO
PROVIDE FOR MAXIMUM UTILITY BY ALL
CONSTRUCTION VEHICLES.
d. MUST BE MAINTAINED IN A CONDITION
WHICH WILL PREVENT TRACKING OR
DIRECT FLOW OF MUD ONTO STREETS.
PERIODIC TOPDRESSING WITH STONE
SILL BE NECESSARY; KEEP SOME HANDY.
e. ANY MATERIAL WHICH STILL MAKES IT
ONTO THE ROAD MUST BE CLEANED UP
IMMEDIATELY.
RAILROAD B,
CE
au 4
EROSION CONTROL DETAIL
DURHAM COUNTY, NC
l :�,ti4� ENGINEERING DEPARTMENT
�tr�w> REN-:
�6OCMAX 1
/'r S11-T FENCE J�
FLOW OF WATER
� S�ORpGE
F f j3
O
TO INCREASE STORAGE CAPACITY AND
PROLONG THE LIFE OF THE SILT FENCE, IT
IS GENERALLY ADVISABLE TO DIG A
SEDIMENT PIT IN FRONT OF THE SILT
FENCE WHENEVER POSSIBLE.
SF
EROSION CONTROL DETAIL
°i DURIIAM COUNTY, NC
ENGINEERING DEPARTMENT
REF-
STEEL POST
WOVEN WIRE FABRIC
WARNING SIGN
ORANGE. UV RESISTANT
HIGH - TENSILE STRENGTH
POLY BARRICADE FABRIC (TYPICAL)
N
n
SIDE VIEW
IIII
NONE
NOTES: APPLICABLE AT ALL POINTS OF
INGRESS & EGRESS UNTIL SITE IS
STABILIZED, FREQUENT CHECKS OF
THE DEVICE AND TIMELY
MAINTENANCE MUST BE PROVIDED.
CONSTRUCTION ENTRANCE
NOT TO SCALE 1
DATE ID
02r09 CE - 1
12 GAUGE 4'X4' OR 2-X4' WELDED WIRE
HOOKED ONTO PREFORMED CHANNELS ON
META- POSTS..
ULTRAVIOLET RESISTANT (BLACK) MIRIFI
FABRIC OR EQUIVALENT SECURED TO WIRE
W1 METAL CLIPS OR WIRE AT 8' OFF
CENTER.
MAX. SEDIMENT STORAGE LEVEL, REMOVE
SEDIMENT WHEN THIS LEVEL IS REACHED OR
AS DIRECTED
•
.7 _7 _. TRENCH, COVER W1 SOIL & TAMP BACKFILL.
- - - - - _ SHEET DRAINAGE (ONLY)
----------------
NATURAL GRADE
I I CARRY APPROX.12- OF FABRIC INTO TRENCH.
N I -
CARRY 6' OF WIRE INTO TRENCH.
METAL POSTS AT 10'0.C. MAX..
NOT TO SCALE
TEMPORARY SILT FENCE D,iE ,"
02 09 SF 1
foo,
ORANGE, UV RESISTANT
HIGH - TENSILE STRENGTH POLY BARRICADE FABRIC (TYPICAL) =)II II�II
FRONT VIEW
MIN. 12-1/2 GA.
INTERMEDIATE
WIRES
' TREE PROTECTION AREA
v IB'
M DO NOT ENTER
P
WARNING SIGN DETAIL
NO TES:
WARNING SIGNS TO BE MADE OF DURABLE, WEATHERPROOF MATERIAL.
LETTERS TO BE 3'NGH MINIMUM, CLEARLY LEGIBLE AND SPACED AS DETAILED.
SIGNS SHALL BE PLACED AT 50'MAXIMUM INTERVALS.
PLACE A SIGN AT EACH END OF LINEAR TREE PROTECTION AND 50'ON CENTER THEREAFTER.
FOR TREE PROTECTION AREAS LESS THAN 200'IN PERIMETER, PROVIDE NO LESS THAN ONE SIGN PER PROTECTION AREA.
ATTACH SIGNS SECURELY TO FENCE POSTS AND FABRIC.
MAINTAIN TREE PROTECTION FENCE THROUGHOUT DURATION OF PROJECT,
ADDITIONAL SIGNS MAY BE REOUIREO BASED ON ACTUAL FIELD CONDITIONS.
PLACE A SIGN AT EACH END OF LINEAR TREE PROTECTION AND 50'ON CENTER THEREAFTER
40'
Area para Proteccion
T
de los Arboles
v
Prohibido Entrar
IB,
v
TP WARNING SIGN DETAIL
m�!�. EROSION CONTROL DETAIL
14! DURHAM COUNTY, NC
r, ENGINEERING DEPARTMENT
TREE PROTECTION DETAIL
DATE ID
02/09 TP-1
Steel Fence Post
Wire Fence
Filter Fabric
Hardware Cloth On Ground
Filter of 1" Diameter
Washed Stone
Bury Wire Fence and Hardware Cloth II
II I
Il SECTION
g " 0 C60 o60 ob0ob0ob0 ob0 c>60 ob0 0eo�"o6,
O$ osb
60 0
0
O '0` 0 oaob
90 ��0 o b
g8.88 a
4O 860 ob
ob0 ob0 ob
60 2'60 0-60 ob
ob02 b0 0 0 o60 o p o 0 o p od
o. g0 O, Gob o60ob0o Oo I?iO o Oo o• . o• o.�
Silt Fence
PLAN
4' Min.
..
Top of Silt Fence Must FRONT VIEW
Be at Least V Above
the Top of the Washed
Stone
Bury Wire Fence,
Filter Fabric
and Hardware
Steel Fence Post Set Max. 2' Apart Cloth in Trench
�¢�•.......... Gib
J•, EROSION CONTROL DETAIL
A �` DURHAM COUNTY, NC SILT FENCE OUTLET
yo. EN GIN EERING DEPARTMEN T
..........•
k: C
DATE ID
02109 SF -2
ONSITE CONCRETE WASHOUT
STRUCTURE WITH LINER
10'-0" MIN.
A
0 O
O 0
0
0
0
0
0 O CPO
0
VG1
SANDBAGS TYP.)
OR STAPLE
10 MIL
1:1 PLASTIC SANDBAGS (TYP.)
SIDE SLOPE LINING OR STAPLES
(TYP. )
o z X Q
CLEARLY MARKED SIGNAGE SECTION A -A
CONCRETE NOTING DEVICE (18"X24" MIN.)
WASHOUT NOTES:
1. ACTUAL LOCATION DETERMINED IN FIELD
2. THE CONCRETE WASHOUT STRUCTURES SHALL BE
MAINTAINED WHEN THE LIQUID AND/OR SOLID REACHES
75% OF THE STRUCTURES CAPACITY.
PLAN 3.CONCRETE WASHOUT STRUCTURE NEEDS TO BE
CLEARY MARKED WITH SIGNAGE NOTING DEVICE.
BELOW GRADE WASHOUT STRUCTURE
NOT TO SCALE
HIGH
COHESIVE &
LOW FILTRATION
SOIL BERM
z_
10'-0"
MIN.B
OR SANDBAGS
HIGH
10 MIL COHESIVE &
PLASTIC LINING LOW FILTRATION
1:1 SIDE SLOPE SOIL BERM
(TYP.)
z 5< X
i � \`
00 2, 0„
SECTION B-B
6
A
0
01-1
0
O
O
0
0
0�
O
O
B
SANDBAGS (TYP.)
NOTES:
OR STAPLES
1. ACTUAL LOCATION DETERMINED IN FIELD
/ CLEARLY MARKED SIGNAGE
2. THE CONCRETE WASHOUT STRUCTURES
CONCRETE
NOTING DEVICE (18"X24" MIN.)
SHALL BE MAINTAINED WHEN THE LIQUID
WASHOUT
AND/OR SOLID REACHES 75% OF THE
STRUCTURES CAPACITY TO PROVIDE
ADEQUATE HOLDING CAPACITY WITH A
MINIMUM 12 INCHES OF FREEBOARD.
PLAN
3.CONCRETE WASHOUT STRUCTURE NEEDS
TO BE CLEARY MARKED WITH SIGNAGE
NOTING DEVICE.
ABOVE GRADE WASHOUT
STRUCTURE
NOT TO SCALE
CD COFFERDAM
BOTTOM DRAIN INVERT ELEV. = 273.0
TEMPORARY CONNECTION
TO EXISTING OUTLET DRAIN
112" VALVE
INVERT = 273.2
2
ITI
QP OUTLET PROTECTION
CONC. SILL
RUNOFF WATER
WITH SEDIMENT
TOP OF COFFERDAM
ELEV. = 275.0
FLOW
CONC. SIDE WALL
11-0" 21-011
OVERFLOW
\ 2F
12" WATER PIPE
MAX LOWERED
POOL= 273.2
�7
MIN LOWERD
POOL = 271.00
NOTE: SEDIMENT SHALL BE
CLEARED OUT ONCE THE DEPTH
REACHES HALF THE HEIGHT OF
THE PROTECTION (±1FT)
FILTERED WATER
— — — —
L SEDIMENT
SURFACE OF CONCRETE
OUTLET SLAB
— MIRAFI 110ON OR EQ.
NO. 57 STONE
GENERAL EROSION AND SEDIMENT CONTROL NOTES
ES-1: UNLESS OTHERWISE INDICATED, ALL VEGETATIVE AND STRUCTURAL EROSION AND SEDIMENT CONTROL PRACTICES SHALL BE CONSTRUCTED AND MAINTAINED
ACCORDING TO MINIMUM STANDARDS AND SPECIFICATIONS OF THE NORTH CAROLINA EROSION & SEDIMENT PLANNING AND DESIGN MANUAL EDITION 2013.
ES-2: THE LOCAL AUTHORITY HAVING JURISDICTION SHALL BE NOTIFIED OF THE PRE -CONSTRUCTION CONFERENCE. LOCAL AUTHORITIES HAVING JURISDICTION WILL
MAKE A CONTINUING REVIEW AND EFFECTIVENESS OF THE METHODS AND EFFECTIVENESS OF THE EROSION CONTROL PLAN.
ES-3: ALL EROSION AND SEDIMENT CONTROL MEASURES SHALL BE PLACED PRIOR TO OR AS THE FIRST STEP IN CLEARING, GRADING, OR LAND DISTURBANCE.
ES-4: ALL EXISTING EROSION CONTROL MEASURES WHICH SERVE THIS SITE SHALL REMAIN IN PLACE AND SHALL BE MAINTAINED UNTIL THE AREAS THEY SERVE HAVE
BEEN STABILIZED.
ES-5: ALL STREETS AND ROADWAYS SHALL BE MAINTAINED FREE OF MUD AND DIRT, AND CONTROL DUST AS NECESSARY.
ES-6: A COPY OF THE APPROVED EROSION AND SEDIMENT CONTROL PLAN SHALL BE MAINTAINED ON THE SITE AT ALL TIMES.
ES-7: PROVIDE ADDITIONAL EROSION CONTROL MEASURES NECESSARY TO PREVENT EROSION AND SEDIMENTATION AS DETERMINED BY THE LOCAL AUTHORITY
HAVING JURISDICTION.
ES-8: ALL DISTURBED AREAS SHALL DRAIN TO APPROVED SEDIMENT CONTROL MEASURES AT ALL TIMES DURING LAND -DISTURBING ACTIVITIES AND DURING SITE
DEVELOPMENT.
ES-9: DURING DE -WATERING OPERATIONS, WATER SHALL BE PUMPED INTO AN APPROVED FILTERING DEVICE.
ES-10: INSPECT ALL EROSION CONTROL MEASURES DAILY AND AFTER EACH RUNOFF PRODUCING RAINFALL EVENT. ANY NECESSARY REPAIRS OR CLEANUP TO
MAINTAIN THE EFFECTIVENESS OF THE EROSION CONTROL DEVICES SHALL BE MADE IMMEDIATELY.
ES-11: PRIOR TO ANY LAND DISTURBING ACTIVITIES THE CONTRACTOR SHALL DESIGNATE A RESPONSIBLE LAND DISTURBER (RLD) TO THE DEPARTMENT OF ENVIRONMENTAL
AND NATURAL RESOURCES (DENR) IN ACCORDANCE WITH THE NORTH CAROLINA SEDIMENTATION POLLUTION CONTROL ACT OF 1973.
ALL EROSION AND SEDIMENT CONTROL MEASURES SHALL BE CHECKED DAILY AND AFTER EACH RUN OFF PRODUCING RAINFALL. THE FOLLOWING ITEMS SHALL BE
CHECKED IN PARTICULAR:
A. THE ENTRANCE SHALL BE MAINTAINED IN A CONDITION WHICH WILL PREVENT TRACKING OR FLOW OF MUD ONTO PUBLIC RIGHTS -OF -WAY. THIS MAY REQUIRE
PERIODIC TOP DRESSING WITH ADDITIONAL STONE OR THE WASHING AND REWORKING OF EXISTING STONE AS CONDITIONS DEMAND AND REPAIR AND/OR
CLEANOUT OF ANY STRUCTURES USED TO TRAP SEDIMENT. ALL MATERIALS SPILLED, DROPPED, WASHED, OR TRACKED FROM VEHICLES ONTO ROADWAYS ON
INTO STORM DRAINS MUST BE REMOVED IMMEDIATELY. THE USE OF WATER TRUCKS TO REMOVE MATERIAL DROPPED, WASHED, OR TRACKED ONTO ROADWAYS
WILL NOT BE PERMITTED UNDER ANY CIRCUMSTANCES.
B. THE SILT FENCE BARRIER SHALL BE CHECKED FOR UNDERMINING OR DETERIORATION OF THE FABRIC. SEDIMENT SHALL BE REMOVED WHEN THE LEVEL OF
SEDIMENT DEPOSITION REACHES HALF WAY TO THE TOP OF THE BARRIER. ALL DAMAGES SHALL BE REPAIRED IMMEDIATELY.
C. SEEDED AREAS SHALL BE CHECKED TO ENSURE THAT A GOOD STAND IS MAINTAINED. AREAS SHALL BE FERTILIZED AND RESEEDED AS NEEDED.
D. ALL MULCHES AND SOIL COVERINGS SHOULD BE INSPECTED PERIODICALLY TO CHECK FOR EROSION. WHERE EROSION IS OBSERVED IN MULCHED AREAS,
ADDITIONAL MULCH SHOULD BE APPLIED. NETS AND MATS SH OUDL BE INSPECTED AFTER RAINSTORMS FOR DISLOCATION OR FAILURE. IF WASHOUTS OR
BREAKAGE OCCUR, RE -INSTALL NETTING OR MATTING AFTER REPAIRING DAMAGE TO SLOPE OR DITCH. INSPECTIONS SHOULD TAKE PLACE UP UNTIL GRASSES ARE
FIRMLY ESTABLISHED
E. CONCRETE WASHOUT FACILITIES SHOULD BE INSPECTED DAILY AND AFTER HEAVY RAINS TO CHECK FOR LEAKS. WHEN THE WASHOUT CONTAINER IS FILLER TO
OVER 75% OF IT'S CAPACITY, THE WASHWATER SHOULD BE VACUUMED OFF OR ALLOWED TO EVAPORATE TO AVOID OVERFLOWS. THEN WHEN THE REMAINING
CEMENTITIOUS SOLIDS HAVE HARDENED, THEY SHOULD BE REMOVED AND RECYCLED. DAMAGES TO THE CONTAINER SHOULD BE REPAIRED IMMEDIATELY. PRIOR
TO RAIN EVENTS, THE CONTAINER'S LIQUID LEVEL SHOULD BE LOWERED OR THE CONTAINER SHOULD BE COVERED TO AVOID AN OVERFLOW.
AuIT
A. MORTON THOMAS AND ASSOCIATES, INC.
CONSULTING ENGINEERS
100 GATEWAY CENTRE PARKWAY, SUITE 200
RICHMOND, VA 23235
PHONE [phone]
EMAIL: [e-mail]
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GIN
GIN
REPAIR NIH DAM
INLETS AND OUTLETS
TASK ORDER C100809
DAM INVENTORY # DURHA 105
FEDERAL NID # NC01666
DURHAM COUNTY, NC
PERMIT SET
NATIONAL INSTITUTES OF HEALTH
111 T.W. ALEXANDER DRIVE
DURHAM, NC 27709
[phone]
MARK I DATE DESCRIPTION
PROJECT NO:
22-0363.001
SCALE:
AS SHOWN
DESIGNED BY:
DAK
DRAWN BY:
KHH
CHECKED BY:
DJR
SHEET TITLE
EROSION AND SEDIMENT
CONTROL NOTES AND
DETAILS
C501
SHEET 8 OF 8