NWP-3_NWP-13_VERIFICATION_SAW-2023-01325_jt_signed_08.12.24.pdf

DEPARTMENT OF THE ARMY
U.S.ARMY CORPS OF ENGINEERS,WILMINGTON DISTRICT
y�r RALEIGH REGULATORY OFFICE
3331 HERITAGE TRADE DRIVE,SUITE 105
WAKE FOREST NORTH CAROLINA 27587
August 12, 2024
Regulatory Division
SAW-2023-01325
Sent Via email: [e-mail]; [e-mail]
Permittee: Thomas D'Amico
CMC Building, Inc.
2140 Page Road, Suite 103
Durham, NC 27703
Owner/Applicant: Cameron Thompson, PE
National Institutes of Health
111 TW Alexander Drive
Research Triangle Park, NC 27709
Dear Mr. D'Amico and Mr. Thompson:
This letter is in response to the Pre-Construction Notification (PCN) you submitted to
the Wilmington District, Raleigh Regulatory Field Office on February 20, 2024, for a
Department of the Army Nationwide Permit (NWP) verification. This project has been
assigned the file number SAW-2023-01325 and is known as NIH Discovery Lake and
Dam Restoration Project. This file number should be referenced in all correspondence
concerning this project.
A review of the information provided indicates that the proposed work would include
the rehabilitation to current safety standards of the dam authorized by NWP-3, and
construction of lake shoreline protection in the form of riprap, stone walls, and
vegetation authorized under NWP-13. Specifically, the work would involve the
Permanent (loss of WOTUS) discharge of fill material into 0.447-acre wetlands and
0.344-acre open water for the purpose of shoreline stabilization; and the temporary
discharge of fill material into 0.201-acre wetlands and 0.12-acre open water for
vegetated shorelines and construction access.
The —500-acre project area is illustrated on the enclosed Permit Set, eight sheets,
dated (sealed) September 5, 2023. The project site is located off the east side of TW
Alexander Drive on Environmental Parkway on the campus of the National Institute of
Environmental Health Sciences and the USEPA approximately one mile east of Apex
Highway 55 in Research Triangle Park, Durham County, at Latitude 35.882800 and
Longitude -78.875950, 111 TW Alexander Drive.
We have determined that the proposed work is authorized by NWP-3 for dam
maintenance and NWP-13 for lake shoreline stabilization pursuant to authorities under

CESAW-RG-R (SAW-2023-01325 NWP-3 & NWP-13 VERIFICATION)
August 12, 2024
Section 404 of the Clean Water Act (33 U.S.0 § 1344). The proposed work must be
accomplished in strict accordance with the general permit conditions, any regional
conditions, the special conditions listed in this letter, the application materials, and the
enclosed plans. If the extent of the project area and/or nature of the authorized impacts
to waters are modified, a revised PCN must be submitted to this office for written
approval before work is initiated. Any violation of permit conditions or deviation from
your submitted plans may subject the permittee to enforcement action.
This verification is valid until March 14, 2026, unless prior to this date the subject
NWP is suspended, revoked, or modified such that the activity no longer complies with
the terms and conditions of this NWP. If you commence or are under contract to
commence this activity before the date that the relevant NWP is modified or revoked,
you will have 12 months from the date of the modification or revocation of the NWP to
complete the activity under the present terms and conditions of this NWP.
Project Specific Special Conditions:
1. Please note that future impacts and/or phases and related activities associated
with Corps Action ID: SAW-2023-01325, may be considered part of a single and
complete project; these impacts may be considered cumulative with impacts
authorized during earlier phases with respect to compensatory mitigation and
Nationwide Permit thresholds. Current cumulative impacts to waters of the US for
the Discovery Lake single and complete project include a total loss of 0.447-acre
wetlands and 0.344-acre open water of total potential waters of the US.
2. Suitable habitat for tricolored bat (Perimyotis subflavus) may be present at the
site. On September 14, 2022, the USFWS published a proposal in the Federal
Register to list the tricolored bat as endangered under the Endangered Species
Act (ESA). The permittee understands and agrees that all work associated with
the clearing and removal of trees and removal, or modification of culverts must
be completed prior to the effective date of the final listing in the Federal Register.
Work associated with the aforementioned activities not completed by that time
must cease and the permittee must contact the Corps' (Attn: Julia Tillery, (919)
440-1951 or [e-mail]) to determine if additional
coordination with the USFWS is required under Section 7 of the ESA prior to
continuing work.
3. In order to compensate for impacts associated with this permit, mitigation shall
be provided in accordance with the provisions outlined on the most recent
version of the attached Compensatory Mitigation Responsibility Transfer Form.
The requirements of this form, including any special conditions listed on this
form, are hereby incorporated as special conditions of this permit authorization.
4. Following construction, temporary wetland impacts must be restored to natural
grades and seeded with regionally appropriate wetland plants.

CESAW-RG-R (SAW-2023-01325 NWP-3 & NWP-13 VERIFICATION)
August 12, 2024
This NWP verification does not preclude the necessity to obtain any other Federal,
State, or local permits, licenses, and/or certifications, which may be required.
If you have any questions related to this verification or have issues accessing
documents referenced in this letter, please contact Julia Tillery, Regulatory Specialist of
the Raleigh Regulatory Field Office at 919.440.1951, by mail at the above address, or
by email at [e-mail]. Please take a moment to complete our
customer satisfaction survey located at https:Hregulatory.ops.usace.army.mil/customer-
service-survey/.
Sincerely,
Julia Tillery
Regulatory Specialist
Enclosures
Cc (w/enclosures)
John Ferrall, AMT Engineering, jfarrell(a-_)amtengineering.com
Zachary Thompson, NCDWR, zachary.thomas(@-deg.nc.gov
Kelly Williams, NCDMS, kelly.williams(a�deg.nc.gov

Compliance Certification Form
File Number: SAW-2023-01325 County: Wake
Permittee: CMC Building, Inc. , Permittee: Thomas D'Amico and Mr. Thompson
Project Name: NIH Discovery Lake and Dam Restoration Project
Date Verification Issued: 8/12/2024
Project Manager: Julia Tillery
Upon completion of the activity authorized by this permit and any mitigation required by
the permit, sign this certification, and return it to the following address:
US ARMY CORPS OF ENGINEERS
Wilmington District
Attn: Julia Tillery
Raleigh Regulatory Field Office
3331 Heritage Trade Drive Suite 105
Wake Forest, North Carolina 27587
or
[e-mail]
Please note that your permitted activity is subject to a compliance inspection by a U. S.
Army Corps of Engineers representative. Failure to comply with any terms or conditions
of this authorization may result in the Corps suspending, modifying or revoking the
authorization and/or issuing a Class I administrative penalty, or initiating other
appropriate legal action.
hereby certify that the work, and mitigation (if applicable), authorized by the above
referenced permit has been completed in accordance with the terms and conditions of
the said permit including any general or specific conditions.
Date Authorized Work Started: Completed:
Describe any deviations from permit (attach drawing(s) depicting the deviations):
*Note: The description of any deviations on this form does not constitute approval by the Corps.
Signature of Permittee Date

US Army Corps of Engineers —Wilmington District
Compensatory Mitigation Responsibility Transfer Form
Permittee:Permittee:Thomas D'Amico and Mr.Thompson Action ID:SAW-2023-01325
Project Name: NIH Discovery Lake and Dam Restoration Project County:Wake
Instructions to Permittee: The Permittee must provide a copy of this form to the Mitigation Sponsor, either an approved
Mitigation Bank or the North Carolina Division of Mitigation Services (NCDMS), who will then sign the form to verify the
transfer of the mitigation responsibility. Once the Sponsor has signed this form, it is the Permittee's responsibility to ensure
that Wilmington District Project Manager identified on page two is in receipt of a signed copy of this form before conducting
authorized impacts, unless otherwise specified below. If more than one Mitigation Sponsor will be used to provide the
mitigation associated with the permit,or if the impacts and/or the mitigation will occur in more than one 8-digit Hydrologic
Unit Code (HUC), multiple forms will be attached to the permit, and the separate forms for each Sponsor and/or HUC must
be provided to the appropriate Mitigation Sponsors.
Instructions to Sponsor: The Sponsor verifies that the mitigation requirements (credits) shown below have been released
and are available at the identified site. By signing below, the Sponsor is accepting full responsibility for the identified
mitigation, regardless of whether they have received payment from the Permittee. Once the form is signed, the Sponsor
must update the bank ledger and provide a copy of the signed form and the updated ledger to the Permittee, the Project
Manager who issued the permit, the Bank Project Manager, and the District Mitigation Office (see contact information on
page 2). The Sponsor must also comply with all reporting requirements established in their authorizing instrument.
Permitted Impacts and Compensatory Mitigation Requirements
Permitted Impacts Requiring Mitigation*: 8-digit HUC and Basin:Choose the 8-digit HUC
Stream Impacts(linear feet) Wetland Impacts(acres)
Warm Cool Cold Riparian Riverine Riparian Non-Riverine Non-Riparian Coastal
0.447
*If more than one mitigation sponsor will be used for the permit,only include impacts to be mitigated by this sponsor.
Compensatory Mitigation Requirements: 8-digit HUC and Basin:Choose the 8-digit HUC
Stream Mitigation (credits) Wetland Mitigation (credits)
Warm Cool Cold Riparian Riverine Riparian Non-Riverine Non-Riparian Coastal
0.894
Mitigation Site Debited: NCDEQ Division of Mitigation Services(DMS)
(List the name of the bank to be debited. For umbrella banks,also list the specific site. For NCDMS,list NCDMS. If the NCDMS
acceptance letter identifies a specific site,also list the specific site to be debited).
Section to be completed by the Mitigation Sponsor
Statement of Mitigation Liability Acceptance: I, the undersigned, verify that I am authorized to approve mitigation
transactions for the Mitigation Sponsor shown below, and I certify that the Sponsor agrees to accept full responsibility for
providing the mitigation identified in this document (see the table above), associated with the USACE Permittee and Action
ID number shown. I also verify that released credits (and/or advance credits for NCDMS), as approved by the Wilmington
District,are currently available at the mitigation site identified above. Further,I understand that if the Sponsor fails to provide
the required compensatory mitigation,the USACE Wilmington District Engineer may pursue measures against the Sponsor to
ensure compliance associated with the mitigation requirements.
Mitigation Sponsor Name:
Name of Sponsor's Authorized Representative:
Signature of Sponsor's Authorized Representative Date of Signature

USACE Wilmington District— MRTF Page 2
Conditions for Transfer of Compensatory Mitigation Credit:
• Once this document has been signed by the Mitigation Sponsor and the District is in receipt of the signed form, the
Permittee is no longer responsible for providing the mitigation identified in this form, though the Permittee remains
responsible for any other mitigation requirements stated in the permit conditions.
• Construction within jurisdictional areas authorized by the permit identified on page one of this form can begin only after
the District is in receipt of a copy of this document signed by the Sponsor, confirming that the Sponsor has accepted
responsibility for providing the mitigation requirements listed herein. When NCDMS provides mitigation for authorized
impacts conducted bythe North Carolina Department of Transportation(NCDOT),construction within jurisdictional areas
may proceed upon permit issuance; however, a copy of this form signed by NCDMS must be provided to the District
within 30 days of permit issuance. NCDOT remains fully responsible for the mitigation until the District has received this
form,confirming that the Sponsor has accepted responsibility for providing the mitigation requirements listed herein.
• Signed copies of this document must be retained by the Permittee, Mitigation Sponsor,and in the USACE administrative
records for both the permit and the Bank/ILF Instrument. It is the Permittee's responsibility to ensure that the District
Project Manager(address below) is provided with a signed copy of this form.
• If changes are proposed to the type, amount, or location of mitigation after this form has been signed and returned to
the District, the Sponsor must obtain case-by-case approval from the District Project Manager and/or North Carolina
Interagency Review Team (NCIRT). If approved, higher mitigation ratios may be applied,as per current District guidance
and a new version of this form must be completed and included in the District administrative records for both the permit
and the Bank/ILF Instrument.
Comments/Additional Conditions:
This form is not valid unless signed below by the District Project Manager and by the Mitigation Sponsor on Page 1. Once
signed, the Sponsor should provide copies of this form along with an updated bank ledger to: 1) the Permittee, 2) the
District Project Manager at the address below, 3) the Bank Manager listed in RIBITS, and 4) the Wilmington District
Mitigation Office,3331 Heritage Trade Drive,Suite 105, Wake Forest,NC 27587(or by email to [e-mail]).
Questions regarding this form or any of the permit conditions may be directed to the District Mitigation Office.
USACE Project Manager: Julia Tillery
USACE Field Office: Raleigh Regulatory Field Office
US Army Corps of Engineers
3331 Heritage Trade Drive
Wake Forest
Email: [e-mail]
August 12, 2024
Wilmingt District Project Manager Signature Date of Signature
Current Wilmington District mitigation guidance, including information on mitigation ratios, functional assessments, and
mitigation bank location and availability, and credit classifications (including stream temperature and wetland groupings) is
available at http://ribits.usace.army.mi1.

NO PHOTOGRAPHS OR VIDEO OF Sheet List Table
GOVERNMENT STAFF IS PERMITTED.
REPAIR NIH DAM Sheet Number Sheet Title
C1 .0 COVER SHEET
A. MORTON THOMAS AND ASSOCIATES, INC.
C2.0 SITE SURVEY - EXISTING CONDITIONS CONSULTING ENGINEERS
885 100 GATEWAY CENTRE PARKWAY, SUITE 200
C3.0 PROPOSED SITE PLANS RICHMOND, VA 23235
PHONE [phone]
C3. 1 SITE ACCESS, STAGING AND AERATION PLAN EMAIL: [e-mail]
I N LETS AN D 0 UTLETS C4.0 SECTIONS AND DETAILS - ---
Exit C4. 1 ADDITIONAL SECTIONS AND DETAILS
a
) C5.0 EROSION AND SEDIMENT CONTROL PLAN -
TASK ORDER C100809 �� `� ` °�%, 40 C5. 1 EROSION AND SEDIMENT CONTROL NOTES AND DETAILS
� S
DURHAM COUNTY GENERAL EROSION AND SEDIMENT CONTROL NOTES
DAM INVENTORY # DURHA- 105
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.
a� Lakevie r 2. IF MORE THAN 20,000 SQ. FT. IS DISTURBED , A SEDIMENTATION AND EROSION
FEDERAL NID # NCO1666 ��}� Project Site CONTROL PLAN MUST BE SUBMITTED AND APPROVED PRIOR TO THE ISSUANCE OF A
`�� Discovery Lake LAND-DISTURBANCE PERMIT. ```
° 3. TREE PROTECTION IS REQUIRED BY THE CITY/ COUNTY PLANNING DEPARTMENT TREE % � A/r
F �� N CAR ,
PROTECTION CERTIFICATION MUST BE SUBMITTED TO THE DURHAM COUNTY �f
L A�° EROSION CONTROL DIVISION, AND TREE PROTECTION INSPECTION COMPLETED PRIOR
DURHAM COUNTY, NC �L °���� o TO LAND-DISTURBANCE PERMIT ISSUANCE. ¢ SEAL
4. IF AN OFFSITE SPOIL OR BORROW SITE IS UTILIZED, THE DISTURBED AREA MUST BE _ -
H°pSOnRd INCLUDED IN THE LAND DISTURBANCE PLAN AND PERMIT UNLESS ALREADY _ 040215
PERMITTED. - -� A 21W3*,�,
IN
- PREPARED FOR - 5. IF THE DISTURBED AREA EXCEEDS FIVE ACRES, AN IMPROVEMENT SECURITY WILL BE
REQUIRED PRIOR TO LAND-DISTURBING PERMIT ISSUANCE.
National Institutes of Health Vicinity Map
o Z000 4000 Durham County
Ill TW Alexander Drive Fle rs#ei-C-au
REPAIR NIH DAM
Durham, NC 27709 Hat�n
:kY INLETS AND OUTLETS
RECOMMENDED SEQUENCE OF CONSTRUCTION TASK ORDER C100809
DAM INVENTORY# DURHA 105
fdwer FEDERAL NID# NCO1666
1. LOCATE OR SET CONTROL POINTS SUCH THAT THEY ARE VISIBLE AND CAN BE 14. ONCE LAKE IS DRAINED PUMP LAKE LEVEL DOWN TO AT LEAST ELEVATION 271.0 24. PRIOR TO THE LAKE REACHING NORMAL POOL DEMOLITION OF THE SLAB :tk±�} DURHAM COUNTY, NC
RE-ESTABLISHED. IN ORDER TO CONSTRUCT A COFFERDAM AROUND LOW LEVEL DRAIN INLET AND AROUND THE OUTLET CONDUITS SHALL BE PERFORMED EXPOSING THE OUTLET Gr�ervGlf
2. FLAG CLEARING LIMITS, LOCATE PROPERTY CORNER PINS, RIGHT OF WAY, AND PRINCIPAL INLET CONDUITS TO FACILITATE SLIP LINING. CONTRACTOR MAY CONDUITS. DGuniy
UTILITIES TO ENSURE THEY ARE NOT DISTURBED DURING THE COURSE OF THE CONSTRUCT COFFERDAM USING EARTH MATERIAL FROM THE LAKE BOTTOM OR 25. APPROXIMATELY 20 FT OF THE EARTH ADJACENT TO THE OUTLET CONDUITS
PROJECT. BRING IN TEMPORARY MATERIALS THAT SHALL BE REMOVED FROM THE LAKE SHALL BE EXCAVATED.
3. INSTALL THE AERATION SYSTEM PUMP AS SHOWN ON THE SHORELINE, PLACE AREA WHEN NO LONGER NEEDED, I.E. PORT-A-DAM, SUPER SACKS, ETC. 26. REMOVE APPROXIMATELY 20 FT OF THE EXISTING OUTLET CONDUITS.
AIR DISTRIBUTION TUBES IN THE LAKE, AND START THE AERATION OPERATIONS. 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 27. REMOVE ANY DEBRIS FROM OUTLET CONDUITS AND FLUSH WITH WATER IF
.
PERFORM AERATION FOR AT LEAST ONE WEEK PRIOR TO LOWERING POOL. NECESSARY TO CLEAN THEM OUT. L L
NORMAL DAILY FLOW THROUGH THE 12 PIPE AND DIRECTING INTO THE LOW c CT SET
16. TAKE ALL NECESSARY PRECAUTIONS FOR CONFINED SPACE ENTRY. REMOVE ALL
4. INSTALL SILT FENCE AND PERIMETER CONTROLS AS SHOWN ON PLAN. LEVEL DRAIN. 28. INSPECT THE RISER TOWERS AND DOWNSTREAM CONDUITS AND NOTIFY THE = ''
c
5. TRAFFIC SHALL BE MAINTAINED ON THE ROAD ACROSS THE TOP OF THE DAM. ENGINEER IF ANY DISCREPANCIES OR UNFORESEEN CONDITIONS ARE FOUND. Willowy � ��
Rki e
6. INSTALL SAFETY FENCE AND PEDESTRIAN INFORMATION SIGNS. DEBRIS FROM THE PRINCIPAL SPILLWAY TOWERS AND DOWNSTREAM CONDUITS 29. SLIP LINE THE 60" DIA SPILLWAY DOWNSTREAM OUTLET CONDUITS WITH 54"
7. THE LAKE VOLUME WILL NEED TO BE DRAINED TO PERFORM THE REPAIR SINCE AND FLUSH WITH WATER IF NECESSARY TO CLEAN THEM OUT. O.D. HDPE DR-32 PIPE. CENTERING SPACERS SHALL BE USED TO ADEQUATELY EkClnuer
CENTER THE PIPE THE OUTLET SLIP LINE SHALL BE INSTALLED FROM Pe"`
.
THE 36 INCH LOW LEVEL DRAIN AND THE 60 INCH UPSTREAM INLETS MUST BE 17. SLIP LINE THE (2) 60" DIA SPILLWAY UPSTREAM INLET CONDUITS WITH 54" HDPE 0
ACCESSED AT THE LAKE BOTTOM. BEGIN DRAINING LAKE LEVEL BY OPENING DR-26 PIPE. CENTERING SPACERS SHALL BE USED TO ADEQUATELY CENTER THE DOWNSTREAM END. c-0 1
LOW LEVEL DRAIN VALVE. REGULATE THE AMOUNT OF VALVE OPENING TO PIPE. THE INLET SLIP LINE SHALL BE INSTALLED FROM THE UPSTREAM END. 30. INSTALL NON-SHRINK GROUT BULKHEAD AT EACH END OF OUTLET CONDUITS TO M15 Borman
ENSURE THAT THE LAKE LEVEL IS LOWERED NO MORE THAN 1/2 FOOT PER DAY EACH WELD JOINT SHALL BE TRIMMED AND SOLIDLY FUSED TOGETHER WITH ONE VENT PIPE TERMINATING 1 FT ABOVE THE CROWN OF EACH PIPE. C
z UNTIL LAKE IS LOWERED APPROXIMATELY 3-4 FEET THEN CLOSE VALVE. ACCORDING TO THE MANUFACTURER'S RECOMMENDATION. INSPECT THE PIPES 31. GROUT ANNULAR SPACE IN OUTLET CONDUITS BETWEEN THE EXISTING AND RH Gukr Far
8. SELECT A DAY WITH A FORECAST OF SEVERAL MORE DAYS WITHOUT RAIN AND AFTER INSTALLATION IS COMPLETE TO ENSURE THERE ARE NO ANOMALIES TO BE NEW PIPE FILLING FROM THE LOWER END TO THE TOWER END. MULTIPLElior"i
} APPLY THE ROTENONE TREATMENT TO THE LAKE IN THE AFTERNOON; THEN CORRECTED. GROUT SUPPLY PIPES WITH VARYING OUTLET LOCATIONS WILL BE NECESSARY ;e::s NATIONAL INSTITUTES OF HEALTH
Y COLLECT AND DISPOSE OF THE FISH EARLY THE NEXT MORNING. 18. CLOSE VALVE ON 12" LOW FLOW PIPE IN COFFERDAM AND DEWATER WORK TO ENSURE COMPLETE FILLING OF THE ANNULAR SPACE. CLOSELY MONITOR Project Site 7 �'�= '� r°t
AREA FOR LOW LEVEL DRAIN SLIP LINING. GROUT PRESSURES TO ENSURE PROTECTION OF THE DAM EMBANKMENT. r Jayla d 111 T.W. HAM,ALEX N 27 DRIVE
9. TEST ROTENONE LEVELS UNTIL HAS DIMINISHED TO SAFE LEVELS. IF NECESSARY, Discovery Lake �urn��, DURHAM, NC 27709
� APPLY COUNTERAGENT IF A RAIN EVENT OCCURS AND PRESENTS A RISK OF LAKE 19. SLIP LINE THE 36" DIA LOW LEVEL DRAIN CONDUIT WITH A 30" DIA HDPE DR-26 32. GRADED SAND FILTER MEDIA SHALL BE INSTALLED AT THE END OF THE EXISTING y$ [phone]
LEVELS REFILLING TO NORMAL BEFORE TESTING VERIFIES THE WATER IS SAFE PIPE WITHOUT ALTERING THE VALVE THAT IS INSIDE THE TOWER. CENTERING CONDUITS AND BACKFILLED BACK TO PREVIOUS LIMITS. °a TO Dr�ti�row
e
AND THEN CONTINUE DRAINING THE LAKE. SPACERS SHALL BE USED TO ADEQUATELY CENTER THE PIPE. WE�e
0 33. ANEW REINFORCED CONCRETE SLAB SHALL BE CAST AROUND THE NEW 54 County
N 10. WITH LAKE LEVEL DOWN WORK CAN COMMENCE ON CONSTRUCTION OF THE 20. INSTALL NON-SHRINK GROUT BULKHEAD AT EACH END OF THE LOW LEVEL DRAIN OUTLET CONDUITS IN THE SAME LOCATION AS THE ORIGINAL. 501 MARK DATE DESCRIPTION
N WAVE PROTECTION ON THE DAM, PIEZOMETERS, REPAIRS ON BRIDGE 6, AND CONDUIT AND AT EACH END OF THE UPSTREAM INLET CONDUITS WITH ONE
a, 34. REINSTALL PREVIOUSLY REMOVED OR PROVIDE NEW DEBRIS GRATES ON THE U1
THE SHORELINE FORTIFICATIONS AROUND THE PERIMETER OF THE LAKE VENT PIPE TERMINATING 1 FT ABOVE THE CROWN OF EACH PIPE. END OF THE NEW 54" OUTLET CONDUITS. 147 rr�l �da
o ACCORDING TO THE DETAILS AND LOCATIONS SHOWN IN THE PLANS. 21. GROUT ANNULAR SPACE IN LOW LEVEL DRAIN CONDUIT AND THE UPSTREAM
35. ONCE ALL OF THE SHORELINE FORTIFICATIONS, RIP RAP ARMOR, AND BRIDGE 6
11. ONCE LAKE IS DRAINED, TAKE ALL NECESSARY PRECAUTIONS FOR CONFINED INLET CONDUITS IN SUCH A MANOR TO NOT OVERWHELM BULKHEADS UNTIL REPAIRS HAVE BEEN COMPLETED, THE LAKE LEVEL SHALL BE ALLOWED TO
o SPACE ENTRY. REMOVE ALL DEBRIS FROM THE PRINCIPAL SPILLWAY TOWERS GROUT HAS CURED. DUE TO THE SLOPE OF THE UPSTREAM INLET CONDUIT THE II 70
RETURN TO NORMAL POOL ELEVATION.
`o AND UPSTREAM CONDUITS AND FLUSH WITH WATER IF NECESSARY TO CLEAN GROUT MAY NEED TO BE DONE IN STAGES.
r° 36. ANY DAMAGE TO THE EXISTING ROADWAY AND PEDESTRIAN PATH SHALL BE
IN o THEM OUT. 22. ONCE THE LOW LEVEL DRAIN CONDUIT SLIP LINE GROUT HAS CURED THE REPAIRED TO ORIGINAL DESIGN AND SPECIFICATION PRIOR TO VACATING THE
0 12. INSPECT THE RISER TOWERS AND UPSTREAM CONDUITS AND NOTIFY THE COFFERDAM AND/OR PUMP CAN BE REMOVED. MOVE EQUIPMENT OUT OF SITE. _ Blands
0 ENGINEER IF ANY DISCREPANCIES OR UNFORESEEN CONDITIONS ARE FOUND. LAKE AREA AND RESTORE ANY DAMAGE TO THE SHORELINE ACCESS LOCATION. he DGwns 147
37. CLEAN UP AND DEMOBILIZE. Genl��
Q 13. REMOVE THE DEBRIS GRATES ON THE OUTLET END OF THE PRINCIPAL SPILLWAY 23. ONCE COFFERDAM HAS BEEN REMOVED AND WITH APPROVAL OF ENGINEER,
U CONDUIT BY SAW CUTTING OR TORCHING. CLOSE LOW LEVEL DRAIN VALVE AND ALLOW LAKE TO REFILL. CONTRACTOR r�{� �7: : :;�::.�;.-� �; +�� fup.m
o SHALL MONITOR LAKE LEVEL WITH REGARDS TO THE SHORELINE
FORTIFICATIONS. IT IS EXPECTED THAT THE FORTIFICATIONS CAN BE COMPLETED
J
D PRIOR TO RESTORATION OF NORMAL POOL. IF NOT, THE LAKE LEVEL SHALL BE
00 MAINTAINED AT 4 FT BELOW NORMAL POOL UNTIL THE SHORELINE
z
C7 FORTIFICATIONS ARE COMPLETE.
w
t 1 PROJECT NO: 22-0363.001
SCALE: AS SHOWN
w i DESIGNED BY: DAK
Y
J DRAWN BY: KHH
CHECKED BY: DJR
w -
1 >♦ SHEET TITLE
15
o
jiw � t
co
co
- , COVER SHEET
n�
N DURHAM COUNTY
a --
Y
ll^^ y W
YS
Q
1 00
X SHEET 1 OF 8

-{� TOP WALL CONC POOL TOP WALL
o/268.66'
1-40 60"CMP 1270.78 CONC WALL
60"CM P
1.0' CONC 266.90'
PARTITION WALL 4"CPP I TOP WALL
EXPOS
0.5' LEVEL AND INV= I INV 27013'
NC_ 0.5' CHAMFER 290.87 27223 EXPOSED PIPE 60"CMP
272.12' 267.20'
FLOOR & I TOP WALL CONC A. MORTON THOMAS AND ASSOCIATES, INC.
END SITE CONTROL - REBAR AND CAP NC GRID NAD83-2011
Of INV=268.20' I 270.13' SECTION NAVD88-GEIODI8 CONSULTING ENGINEERS
0 1.0'CONC �- INV= ROOF �r CONC WALL 267.16' CONRTOL LOCALIZED ABOUT CONTROL POINT (CP) #2 100 GATEWAY CENTRE PARKWAY, SUITE 200
w WALLS FLOOR I FLOOR ELEV= 0 267.09' TOP WALL CFG = 0.99992458 RICHMOND, VA 23235
267.77" 272.89' TYP. 268.66'
z Z ELEV=267.80' ELEV=267.77' 60"CMP 296.83 TOP WALL I PHONE [phone]
U, x ROOF N I 270.82' INV N"MCP I CP NORTHING FASTING ELEVATION EMAIL: [e-mail]
w o C0 I � 7.02' 60"CMP
WATER LEVEL IN �! ELEV= N UPSTREAM=267.02'
a 266.95' 1 777507.2329' 2037146.9797' 294.59'
CHAMBER AT 296.89' N EXPOSED PIPE I
SITE 283.5' ON �' I 7.00' 271,93' I DOWNSTREAM=266.98'
1.0'CONC INV=284.02' 272.19' 2 777290.9834' 2036413.2575' 294.02'
10/01/20 5.05' INV=283.95' WALLS I 266.60'
3 777444.5461' 2035759.2804' 314.11'60"CMP
.,�„ CONC WALL CONC SILL WEIR TOP WALL <
TOP WALL UPSTREAM=26849' 270.04 4 776862.9597' 2035535.7808' 325.07'
36" 60"CMP 270.67' . TOP WALL
CALCULATED FROM CMP INSET #2 DOWNSTREAM=268.45' 268.70'
VICINITY MAP NOT TO SCALE PLANS - INV=273.0' SCALE 1" = 4' INSET #3 CmCSCALE 1" = 8' INLET WEIR=293.03' , ,mnrican Indian Corporation
\ - -
INSET #1 \ / / ' / ' >/ / �\� / \ \ ice\ r - _ - GRATE=284.91' INV=284.42'IN
SCALE 1 = 4 / / / / / \ - _ INV=282.33'IN
/ \ \ A
_ - \ DI INV=284.34'OUT
RIM=274.70' \\ 1 0l\ \ I I / / \ ( / / / /� \ \ \ \ \ 2g0 / � ' \\\ C\ \
DROP INLET \1 \\ III �� I ' / /8"'CP 293.83' 1
N INV=267.83'&260.32' I \\ \\
265.8'x I I \\ \
_
\>�\ 1 J \ \ / / / o \\\� \ \ / / - -/ / / / / I \ DI
°�\ I ( \ \ I I \\\ \ / J/i �i�- - \I / , RIP/RA \ GRATE=289.91'
I I\ �6p \v \ a\ \ \ \ � \ \ \ \ \ \ \ \ 1 \ \\v \\\ / /�290 t / / r^ Cl1g" R \
r / / \ \\ INV=286.68'IN
A16*1V117 I
v, / I I I I / \ I I / I \\/ \\ \\ �\ \ \ o \ \ \ \ / \ \ /� / I / / o 1 \ INV=284.92'OUT
I \ \ \�o x�a\ \ \ \ \ \ \ \ \ �s \ \ \ \ \ // / I L'/ _ - - \ / / / RCP \ \ \a \ CB
"Jo
n s \ GRATE=292.00'
\ CP, ) \\ \ \ NV=290.29' `ir1 rrr
A'� 6s 264.9' - ?, c p� pQ' SI
x� \ \\ \ ��\\ '\ \ C
\ \ / I I
I I I I \ \ � / / \ \ I I \ I I
/ I I I I I I I 1 1 N I I I I 1 �- \ \ 1 � - _\ \ \\ \� � � \\ \\ �0, _ � �G _ SEAL9� .=� =_
l ,
I�H 1 I I / \ \ \\ I �\ / � \ > 1 \ -IWI I I ) \ \ \ ��s \ l I IIIII If\ \ \ \ 11 I \ � c, _ _
_ _ - / I 1- CP / / r I I I / 1 \ \ \ \ / / I I I I \ \ ` I \\ \ I \\ \\ oI d� \ I 11 4 CIO 040215
If „ I / END o / I I I I I I/ / / / 29s\ I 1 I \ - \ \ �/� :o �lWr' 2 .�
/ _ P / / / / / 2949.3' �� \ //f • 1N Gj
C45 / CP \ \ CP � /� )\ \ - - - � \ ,, I \/ 14"DI / .L'Ip 1 DES16NATION/I/OSTI I I I I I / J / / // // /// `\ 1 I � � \ s, I 1 �� ;��0
�w \w P \ J / / I SIGNAL / l I �,� J / l // / /� / /io// l \ \ I I � CP1 ` \ �1 / A.• KR1S�
W \ - P
\ \ \ \ N C�-
I INLET WEIR=292.70'
\ \ I I - - � - - _ _ / / / / /i ti ( \ I I INV=288.85'
\ \ \ \ \ \ \ \ \ ?8 ?_�
\ -270- / �r�ir,� Fr`� 2 _ _ _ _' ' / / ' ' �� / Zaj j /// / / to ( Y JS
I I R \ \ �ff / / /_ - g0 / / / / \ I SOLAR LT UEDB
_ __ _ - - - �20 x G� 293.71' \ \ \\ O
294.18' x y \ \
\ \\ \ \\ \ \ \ 2 \\ \ `W� -1�=2�8�7Z - - -275 - - - - - _ i / ' �-��- - '- ' S' OF'SICE Y' �/ i i i / / I D \
\ _ _ - _ - - - - - _ / \ / \c I\ \ \\\\\\ REPAIR N I H DAM
_INtE�- - - - - - - - - - - - = - e� - - - - i_' � i '
\ \ \ \ \ 3 - - - - - - - - ' RO - 2g5' _ _ G_ �J \ - � INLETS AND OUTLETS
\ \ \ _ �5- - _ - - 280 _ - - - _- _ _ _ - - _ / v� \\�
\ \ \ \ \ ` \ \ \ � \ \ - ��- - - _ - - - _ _ _ - _ _cr_ _ - - - 85 -2g� - _ F�gylr _ _ - - x293.8' \ G �d�jj \ \ \ \ `�
-ram ---ems- - - - _ _ _ _ -_ _ ,�_ _ _ _ - -? L _ , _z16 e5 �Irr -_ - _ _ - - _ - / F d �, \ \ TASK ORDER C100809
295 \ \ __ _\ 290� \_-tN_V-_27 &2frS-79� � --5 28 _-�1 _ =_ I � &ACf CONTROL 2g5
_ _ PANEL i _ - _
_ 40"GONG / - - -� �UNEP��`\ I+NV73.3fl _ - - - - - - - - _ - - - - 2 0=S _ - = ' � � ' � � / / / / %�!� ' ' FIBS OPTIC U i �p � L� - \ ��� \ \ \ \ \~ \
\ �_ _ _ R P \ \\ DAM INVENTORY# DURHA 105
WALL - NO VEHICULAR TRAFFIC OR HEAVY , _ ��� �wTli� � _ -N��7 3 --290_ ________ _ _ _- s_ __ �s _ 15 -2g5 / / / , - , d � // EP Soo - \ FdFds \�\ \\ FEDERAL NID# NCO1666
_ EQUIPMENT IS PERMITTED ON FIRE LANE - 295-�Au -`°-_- vaa - - - _ - - - - _-290=_ ____ - - _ - -_ _ - ss--R S , / uT 295-
\ \ \�300\ ACCESS DRIVE ADJACENT TO MRI BUILDING \ \ _ �L -� ��=88. _______ _____-____J �-S - = 295- - - GRAVEL S�-ems ° t ° vE� /2g5 SSA PSP /�/ i - \\ ��\\��' DURHAM COUNTY, NC
/ \ � - - - - - - - ' - - � \° - - - (TT DRAIN 9� 9SAy \ � \ 9
-C$N -�1A TLM 95- _ _ _ /2 UE ° j
\ - - - - _ _ _ -WITH LID _ - / - - - _ - - - - - � TRAFFIC v� x \ \ \ 9
/ \ \ - \ \ - -SEE-' MSEV _ / - _ LIG1�T j / � 295 /� SS SS _ / 269.6' \\\
lRV - �`RATE_294.85; J� �- - - - - - - _ - - - - - - - #1_ - -� - - - - - B / // \\ \ \
\ \ - - - EP \l�D� _ i i�T� SS�-/ 15"RCP
PA V kD , `�285.35' _ - - _ - - - - _ - - - -coN P7�tr - - - - -TR-AFF C _ - S DB B HALT SIDE`N ALK i / S S S S� S S S�\ l S S
Op IR / ROAD \ - - - - - _ - - - - - ' WITH RAISABLE METAL LIGHT - - r U/ EP / \ 269.1, \ \ \
_ \ RIM=295.50'
/ `4 �ti \ - - - - - - - - - - - BAR - - - �° _ _ -295 �D _ / -� / RIM=294.04' / I ` ��h / - \ \ \\ �� INV=278.35'OUT
Y I A - - - 295.18' V B /
PROPA E / \ \ �` ° HH o � D - - - - METAL - _ - - - - INV=276.85' / I I \ 0 \ \ \ \
- / PAD
/ / ' // / EP METAL 95- - v, u1DB / _ _ _ - _ - - _ - _ _ _ / IN INV=276.77'OUT I I \ \ \ \ \ \ \
TANKS o / _ , / _ - _ ___- _ _ _ _ _ - - _ _ _ _ / I I \ \ \\\�9s \ moo, PERMIT SET
JQV3 _ �u�B LAKEVIEW DRIVE - _ -290
\ x x x / UTDB -290_
\ `- - / - A - - - UTDB N 295,59' 295.59'HH 295.43' - _ ' - - - -_ - - =
1 _SPH EP
- - - - - - / '� At-76 . ALT SIpE u T UTD 9 H � _ '_ 2 0'
�- "oft^295- 6jI' FIE 295 �_ _ - UE�_ E - /� � - - - - _ - -
(N - - - - - - - - - _ - - MET�CL- - - - - - - - - - - - -o- TR9FE1£
LGH
INV CpL 273.98'- - - - - - - - - - - - - - - - - - - _ o _ -_ _ - ' i � - � / 280-
\ \� /INy�276.60($) - - - - - - - - - - - - o
Z - - - - - -IN'sa`�86:02 - � C �C ``' \/, � / _ - -0- - _290- - - BA-KM AUE- -290-ON
} CP4 -/ - -= I o) 5 // // - - - - - - - - - - - -OPlTF�OL-P��7Et=_ i�� ;' - - - ;;/ ;28�� __: -_ _ - \� \\�\\ \\ \\ \ \\ \ \ \ \ \ // //; NATIONAL INSTITUTES OF HEALTH
RIP RAP o / � - � - � _ �
Y _ J $ / S o / /o //// _ � � ' � 285 2- _ ' °,o-/ ' - - - � - _ - _= \ \ \ \290\ \ - / / / 111T.W. ALEXANDERDRIVE
t/ / �/N / / / / - - - - - - - - - - - - - - - - - - _ - _ ' o - _ _ ' _ ' -_ _ \ \ \ \ `mod, \ \ \ \ \ _
/ / / - - - - - - - - - - - - ' � - �2 c'�/ _ - j�275_ _ _ - - - _ �c�s \ \ \ \ \ \ \ \ \ \ \ \ � \ \ \ \ g0 / ill DURHAM, NC27709
280- z�- - 0 \ \ \ \ \ v\ \ '2 / [phone]
1p
sr It RIM=291.51' r -� _
INV=284.01' I I I I I I I / // / -280- - - \ j /� - - - - - - - I � \ ^ \ \ \ \ \ \ \ \ \
Nti1 I I I I� I i // MARK DATE DESCRIPTION
/ - �� - - - - - - - / m Z0 \\ \ \ \ \ - _ - - = _ _ _ - - - - - - -
a � �oZ _ _ - - - - - - 4 ',� � / x
o _ l_ \ \ /
o II II I I I / / h Q _ _ - _ �� / \W � / ' 271.1' x27,.5' 27,.s' I I I \ \ \ \ \ -
CY) II IIII / I I I 1 / I / / / / / �2 �
N
o I I 0 1 1 11 I I o0 I I / / / // / Q x271.6' \ \ \ \ -
II x27o.7'
v MRI BUILDING I 1 11 II 1 / / I ( / \\ 1 I I \ I DISCOVERY LAKE ./
o III 01p11I 1 I x271.4' /� - - - _ - _ _ �2 5�
m I I II -2 I \ \\ 1
75- \ 00
z / IT11 x269.6' I / / / _ -v5� I \ \
0 RIM-295. I // I N / - \ /
INV=27 .19'oUT I I / I / \ / \ \ I I / / ,Ip/ / 1 I I - - l \ II I I
= I I I I 1 / I I \ 1-1
/ PROJECT NO: 22-0363.001
SCALE: AS SHOWN
x269.7'
w 1 I I I I I 1 I \ \ / / / / / / ? / ( s DESIGNED BY: DAK
Q I I I I I\ / I\ \ ) / / / / / / x269.5' ( x271.2 // I\ 1 \ \\ / // I I I I DRAWN BY: KHH
>_ DI INV=286.74' I I I I I \ 1 / / / / / / - - -^ - - - - - - , \ - - J / \ \ � \ / /
Of NV-\5.4V' \ I // / / / / i - - - CERTIFICATE OF GLOBAL POSITIONING SYSTEMS SURVEYS CHECKED BY: DJR
w GRATE=293.92' 18 RCP ��
Q ` - \ - \ _ 1 / / NOTES: I, CLINTON B. OSBORNE, CERTIFY THAT THIS PLAT WAS DRAWN UNDER MY SUPERVISION FROM AN SHEET TITLE
U ACTUAL SURVEY MADE UNDER MY SUPERVISION; THAT THE RATIO OF PRECISION AS CALCULATED IS
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 CPS SURVEY: 1) CLASS OF SURVEY CLASS A; 2) POSITIONAL ACCURACY DOES NOTE
0 2. DISTANCES SHOWN ARE HORIZONTAL GROUND DISTANCES EXCEED 0.10'; 3) TYPE OF GPS FIELD PROCEDURE STATIC AND RTK ; 4) DATE OF SURVEY
o 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 GEIODI8; COMBINED GRID FACTOR 0.99992458; 9) UNITS U.S. SURVEY FOOT; AND
ch 40 0 20 40 80 160 REFERENCES: THAT THIS MAP WAS PREPARED IN ACCORDANCE WITH THE STANDARDS AND PRACTICE FOR LAN
o SURVEYING AS OUTLINED BY THE NC ADMINISTRATION CODE TITLE 21, CHAPTER 56.1607. CONDITIONS
N 1. SITE DEVELOPMENT PLANS PROVIDE BY HDR, DATED 1977, AND
N STAMPED "TURNER RECORD DRAWINGS REVISED 7/12/83, WITNESS MY HAND AND OFFICIAL SEAL THIS 13TH DAY OF OCTOBER 2020.
DRAWINGS REFLECT AS-BUILT CONDITIONS".
( IN FEET )
m
� 1 inch = 40 ft.
Z
Q
I- L-3834 ---------------------------
U) LICENSE NO. PROFESSIONAL LAND SURVEYOR
U
x SHEET 2 OF 8

AUXILIARY
SPILLWAYDISCHARGE
ISCHARGE V\>
AMT
(NO CHANGE WITH PROJECT)
I 411;5 PEM and PSS WETLAND IMPACT LOCATION 264.9'
i $6-jb-6PN-WATER IMPACT APPROXIMATE LOCATION
L /
/ PROVIDE CLASS B RIPRAP WAVE PROTECTION / \ / / /� / / A.MORTON THOMAS AND ASSOCIATES,INC.
I --_1 \ 1 \ p -ALONG UPSTREAM EMBANKMENTS FT ABOVE ��� I CONSULTING ENGINEERS
100 GATEWAY CENTRE PARKWAY,SUITE 200
/ / 1 AND BELOW NORMAL POOL ELEVATION OF 284.0 1 ( V ) ` I
CP /--�- i �� __� / _ W_- � � ` _ I / \ \ / 1 I �\p I RICHMOND,VA 23235
iLp�CP��' x��X�X �/ —� \ V // \ QI O(/' \\l PHONE[phone]
EMAIL:DRIS [e-mail]
x_ i END 9F NO VEHICULAR TRAFFIC OR HEAVY
v---- �n I- "I - / �O DESIGNAT EQUIPMENT IS PERMITTED ON FIRE LANE
p� \
Cp G,- I P p� ' /�� -, SIGNAL / ACCESS DRIVE ADJACENT TO MRI BUILDING
- � , W— / /
-- -w� �X��I p DEMOLISH SLOPED CONCRETE
i
v�„ / SLAB FOR SLIP LINING AND
2�0 14 DI ---- RECAST ONCE COMPLETE.
- ------
_ —270- — — -SLIPLINE EXISTING 60"DIA CMP OUTLET
------�_---___ -CONDUIT WITH NEW ASTM D-3350 PROVIDE TRAFFIC
- -_ _ ----- ����' i _--- _--- - — _ CONTR R 215_FT RETAINING WALL ��
_ - • \\� �/III OL BARRIE +
_ 54'DIA HOPE DR 32.5 PIPE
—TOT
l
_ — — — -p5- ----------�-- -- - _ = - -,Z 5- --T _� _ I 150±FT + RIPRAP
- Z _ _ _ _ _ _ 200_FT s'
--
FILTERDRAIN_ - _ -_ __ --_- / �\ FT
nrr
CH- --
--- i - LANTINGS -
CAR
-- —————— -D- -- - _ - �__ -
H VEGETATION
-- ----- —280— — — — — -r __-- -- _ - ;_ _----- i /` J PLANTINGS
�`�I �..1w /-
-28o— - - - ------ _�---_____ - - - ---_- -_--- - _ I �I III 80- 7- \ \ • '�
Z7-- - - - _ O �7 �� r ��� FTRIPRAP��
--- - - �j - - - -
\ +
SEAL
-------- —_ — _ — - J I - -
__—— _ — — — — o4az e ss�� - PIEZOMETER LOCATION _
ss208+FT
-- -=ems -- _ — — —— --- - - -- - B-sAls��� VEGETATION
/� A� ���
_ _ — ----------- — --__ ---
- _ —�8=8 —
-s---ss��s-- �- - _- \VAV �I I I / PLANTINGS VA �/� \ ��•.. ,.�
_------------PIEZOMETER LOCATION- --- ���.�s_ - — -295 J l / 1 I � � %� II/ 34±FTRIPRAP
I / � l n
ETATION
00
---- — — — — — -ss — 15'&e — -
- ------ i - p — — IDGE
/� '� — �
— — —_2_90_ _-- _— _— _— -- _ ---____ --� — s_� ss� /�� / // A7,I / _ — -
- -- -- -- B-6 - - — — — — RAVEL /�/ III/Ill/ l�ll 38±FT RETAINING WALL 'IIII / — —(NO ANTICIPATED WORK)
—_— ----- — —295
---------------- - — — OT DRAIN I 34_FT RIPRAP - —
------ REPAIR NIH DAM
- - - - - -- - --295--_� --__ � l/lI lI � -,, _�
_ _ � ��� I���II� �II� 44+� IIII INLETS AND OUTLETS
----- TRAFFIC I // /I ( III O
------ __ _ � TASK ORDER C100809
---------------- ___----- _LIGH-T J��� V DAM INVENTORY#DURHA-105
- --/-- /�------ --- o-- -�-- / VEGETATION
FEDERAL NID#
�_ -- / / � p l — DURHAM COUNTY,NBC
——————— __—�95 I i ) IlI PLANTINGS
--�R-AFDC Q ——
PA6 - _ UE ��_u� — _ _
O - E ` 2 5✓ B/TDB U I II
ITH RAISABLE METAL LIGHT -- �— _ II I0 I I� �l/
{�fZ� �E------ _ _ _ BRIDGE7
_ — — O 295.18 ut Eli>u� I BRIDGE 1 / / (NO ANTICIPATED WORK)
METAL - 95 H H /uT'd8�� I(NO ANTICIPATED WORK)) / 44±FT VEGETATION
u usn PLANTINGS
2a,5"1 28 \ I I
PERMIT SET
IVE CONCRETE RISER STRUCTURE
212±FTRIPRAP
x __-
9 HH 295.43' / ns uESB -- p----i-_-- / I rl I I — 40±FT RETAINING WALL
- _ 1
8—i T"c —urn mra Ina H H '--_ /�/I �/ _ 72±FT RIPRAP I I 1111� i A
IIl � � 7
208±FT / II //
p ue—ue uE_uE _ -- �'�i i __ VEGETATION
J --_ _-__- m yao --------------_-_--- I PLANTINGS
p
_I T RETAINING WALL G \�
v\VV
/ \ l\vp�
NATIONAL INSTITUTES O F H
EA LTH
------- TFR 6— 111 T.W.ALEXANDER DRIVE
- ————————— ________ ----- Y45±IFTRIPRAP 7 DURHAM,NC 27709
BRIDGE
---------------- - -- O WORK) 115±F [phone]
(NO ANTICIPATED
RR ------------------ --____ o VEGEATION 100±FTRIPRAP
PLA MARK DATE- 90- -� INGS DESCRIPTION
-0 ----� \CP , 120±FTRIPRAP 118±FTRIPRAP
----------,
$ 27---- — _
"""
_ SLIPLINE EXISTING 60"DIA CMP INLET /I I / �� ✓p BRIDGE 3 I I // -� -_ 8
/CONDUIT WITH N-'EW--ASTM
D-33i50
(N O ANTI
TI�C IIP/ATE
l DI/WORK)
ORK)
54"DIA HDPE DR-32.5 PIPE- - 1/I0�/I4 I±FT RETAINING
�R-ET_�AI/N IN G WALL
—280—--- i E
-- - VEGETATION
--- ----- ----- PLANTINGS
\
SLIPL
RAIINE EXISTING 36"DIA CMP LOW LEVEL
z DNCONDUTWITHNEWASTMD-3350 ---- -------
I
c7 �' "DIA HOPE DR-32.5 PIPE
/ / / / --- S � BRIDGE 6
------------ -- � BRIDGE
(SEESHEETC4.1)
PROJECT NO: 22-0363.001
(NO ANTICIPATED WORK)
/ i
z PROVIDE CLASS B RIPRAP WAVE PROTECTION —275— / � � ) /�� " ' V�I'VAI�� /'� —/�� — scALE: AssHowN
r p ALONG UPSTREAM EMBANKMENT 5 FT ABOVE _______ / I BRIDGE 4 I /�� / I DESIGNED BY: DAK
AND BELOW NORMAL POOL ELEVATION OF 284.0 �/ / I I .(NO ANTICIPATED WORK) l II / I I I� ��//� I //
I I �/ / J�I I � � \ � � ��II / � � � �� / DRAWN BY: KHH
/---------------------- \ \ / / ��/i i i l /ice_�%lll/�/ - - � / III i
I / III / \ ` /�/ CHECKED BY: DJR
'`' �/ '�� / / ___________________ --__/ 1 171.1' v / // //// / �//pi/IIII � I�/� V�� SHEET TITLE
III
SHORELINE REQUIRING AQUATIC VEGETATION PLANTINGS PROPOSED SITE PLANS
____________________________________ ______________\\\____ I I \\ p •p •p SHORELINE REQUIRING RIP RAP INSTALLATION
f- _ _ I11111�Ijl// I I I I
` ______________X2_70.7----------------------
+; • • SHORELINE REQUIRING RETAINING WALL
•
� PROPOSED SLIP LINE SITE PLAN �������--- ���� ° 10' zo ao• J SH � � ' / INSTALLATION, �I I I�1� � II
A 1`--------- ---- A � ,
n ORELINE FORTIFICATION PLAN ° 50
C3.0
U 1 SCALE.1'=20' 2 SCALE.1"=150'
jl SH'CLI 3 OF 8

\ \ / — �\ \ \ \ AUXILIARY SPILLWAY DISCHARGE_ \ /\\ l \ \\ \ \ \\ \ \ / /
(NO CHANGE WITH PROJECT)
�
6 4.9
PROVIDE CLASS B RIPRAP WAVE PROTECTION \ I / / // I / r� A. MORTON THOMAS AND ASSOCIATES, INC.
N � � J \� \� 1 -' � ALONG UPSTREAM EMBANKMENT 5 FT ABOVE \ \ / / / /// / / � �/ � \ / CONSULTING ENGINEERS
I \ \ I I ( / 100 GATEWAY CENTRE PARKWAY, SUITE 200
w_ _ — AND BELOW NORMAL POOL ELEVATION OF 284.0 I 1 / / I \ I I I RICHMOND, VA 23235
CP CUP I 1 \ I \ 1 1 \\ \ 1 \ \ I 0 PHONE [phone]
EMAIL: [e-mail]
END 9,F NO VEHICULAR TRAFFIC OR HEAVY
EQUIPMENT IS PERMITTED ON FIRE LANE
,, I- ► I -� DI ,, 'I DESIGNATI
P P�X� /rL I / —' ACCESS DRIVE ADJACENT TO MRI BUILDING
cP c _c c - w �� I SIGNAL
w - - w I / DEMOLISH SLOPED CONCRETE
W X / SLAB FOR SLIP LINING AND
�O RECAST ONCE COMPLETE.
\ — - - - - SLIPLINE EXISTING 60 DIA CMP OUTLET _ - \ \ / /
— — — 270— , — — — - - - I ` \ 1 I I I
- CONDUIT WITH NEW ASTM D-3350 j \ \ \ I RET■REl RE
- - - $-¢ _ _ _ _ _ _ _ _ -� -
- - - - / � � / _ I _ 54 DIA HDPE DR-32.5 PIPE _ _ - - -ZSQ - _s� \ \ \ \ �� � PROVIDE TRAFFIC \�\\\ \ I � �j �
_ - - � ' — — ', _ , \ \ I I CONTROL BARRIER 215± FT RETAINING WALL 1 \ \
_TcrF
FT1 B-7 — _ — I / I /
— — — — —275— - - - - � - - - - - - — - - FJ' , � — ` \\ 150± FT 200± FT RIPRAP
- - - - - - - - - - - - - - - -- - - - - - - - - _ �2gj _ _ 'ZS _ / �� ,- 1 \ \ _ II VEGETATION I /
FILTER DRAIN _ - -05 - - - - - - - - _ - " ' ' )' \ I 100± FT
_ _ _ _ - - PLANTINGS
_ _ I \ N
- " - - - FR� I VEGETATION CAR
_- - - - - - ___ — — _ 280_- - - - - - - - - - T - - T - _ _ . _ - - - - _ " _ - . _ ' - , _ ' \ I \ I + _ PLANTINGS \ / SI :
280 — _ _ _ _ _ _ - - - _ _ _ - - -- - - - - - - - — _ — _ _ _ _ _ ' _ O_ " -2� \ I II I \ \\ \ I II ( 80_ FTRIPRAP
\ -Q
- - - - - - - - - - - - - - - -� _- - - - - _ _ 2g5 _ _ - , '2g — ' _ � III — ��11 � �\� \ \\ \\\\\ _ SEAL
— ss — — — — - - _ _ _ _ — - - � - - _ _ _ — PIEZOMETERLOCATION ' ' _ / / / 11 208± FT t / \ 99•RR \\ \\ \ 040215
- - - - - - --�5 — — — _ _ _ �_ - - _— _ - - - - — — ' B-8Alt- i / I �/ ��III I /
285— — — ——ss—�ss s� - - - - - - - - - - - - - - - � \\ / // 1/ //l VEGETATION QIN �
- - - - - - - - - - - - - - - - - - - - - - ��s-ass _ - - o_ - - _ _ _ - - — \ l rrl � / �IIIII ( / PLANTINGS I / ,- \\ \ — � \ ) : ... � ��'�`;
- - - - - - - - - - - - - - — _ - - - �-�s- - s_ _ — 290 _ - - - - _ — " — _ , — ' ' / KRIS��,,
PIEZOMETER LOCATION - - - - - �s ���_ _ - - cJ ) ) ) I 1 1 /� / ��
- - - - - - - - - - - - - - - _ — — — _ — - - _ - - _ _ ss�`ss _ _ - �1 — -29 - / / l /r� /� I//I. 34± FT RIPRAP I ( / _
_ - - - - - - _ - - - - Jcls � ' l �� l — BRIDGE8
- - - - - - - - - - - - _ - - - _ Ss �
_ — —290 _ _ , - ss ��ss 38± FT RETAINING WALL I I I (NO ANTICIPATED WORK)
- - - - - - - - - - - ' _ - - - - B-6 — - - — ss—
— — — RAVEL - - - _
-- - - - - - - - - - - - - - - - - - --- _295—
_ _ - - - - - - - - _ _ _ _ _ _ - - - - ' - - - - - — _ I — LOT DRAIN ( � // �� %1 ��� /// // III 34± FT RIPRAP REPAIR NIH DAM
- - - -295— ��
INLETS AND OUTLETS
TRAFFIC , , -
- - - - - - - - - - - I T \ \ ( � 1 1111 III Il I I II TASK ORDER C100809
_ _ _ - - - - - - - - - - - - + _ _ \ \ ���- 44± FT
- - - - - - - S�B \\
\\\
DAM INVENTORY# DURHA
105
' VEGETATION FEDERAL NID# NCO1666
O 5 B-9 PLANTINGS DURHAM COUNTY, NC
-TR-AF-F - /P AD- - _
LIGHTITH RAI ABLE METAL 2 5 \
o �jD BRIDGE 7ARRI7$ADE _ -p 295.18 BRIDGE 1 (NO ANTICIPATED WORK)
HH E
(NO ANTICIPATED WORK)
METAL DB/� �\\ , �� - ( ) � 44± FT VEGETATION
�j �E�f �\ \\�\ \� // PLANTINGS \ \ \I I \ \ \ I I
— UE
\ \\\�� \��\\ \ III (<<< \ / J � PERMIT SET
�j j� ��EDB CONCRETE RISER STRUCTURE �_ / 212± FT RIPRAP 1 I 1
�/ _�_�� /
295.43' DB uEDB ' ' ' _ _ / r — ii 40± FT RETAINING WALL
— I I I I
, —
HH
UTDB HH _ _ I I I
UTDB— / _ — ' ' ' " ' ' " _ // /' I / // / // / _ 72± FT RIPRAP I \ \\ /�
U B �.B UTDB — /
DB UEDB —UEDB—lJ1<DB��UEDB _ _ —�/ � _ ' _2�0_ _ 208± FT I \\
I �/
z _ - _ " - VEGETATION / / i \ \ ( \\\ �� _ L
UE UE _
�E UE PLANTINGS ��/ j _ 120± FT RETAINING WALL >�� J /
\\ NATIONAL INSTITUTES OF HEALTH
Y - - — — —
— — — — — — - - - - - - � TRA�FIE' _ _ - - — _ - - - � — �� �
%, 45± FT RIPRAP —� ��� \\ \ 1 J //� \ 111 T.W. ALEXANDER DRIVE
- - — — — — — - - - � — — — /
/ LI GJ-�-T- — _ _ /� / i I ERR DURHAM, NC 27709
o - - - - - - - - - - - - - - - - - - - - O _ _ - - — I I � /�/ I III � / BRIDGE2 � + �A• � �\\ �\ \� -�-\\ � \ l /
_ _ _ _ _ - - - - _ _ _ _ - - - _ - ' (NO ANTICIPATED WORK) I I 115- FT �' \\ (984) 2874382
o -- - - - - - - - - - - - — p i _ - - - U' _ � _ - - 1 I / ��� I VEGETATION 100± FT RIP RAP \\ ✓ / \\\\
N _ _ _ _ _ _ _ — — 1TAFR IAA _ —29 0 _ _ _ O — _ _ _ , , " , o — _ — , , I I / /� �/ �, I / I , I III PLANTINGS \ \ \\ \\j MARK DATE DESCRIPTION
- - - - - - - - - - -C-04Tf�BL- -RA�NEL _a- _ _ _ _ , _ , , _ _ - , _ _ _ _ / I � � /// / I I l J / I \ \ �� \ \\ �
- - - - - - / _ L 8� 1 �/ // / / I / / I I 120± FT RIPRAP 118± FT RIPRAP \\\ \\\ \ \ \
o - - - -- - - - - - - - - - - -
O / I I / III I / / I / I I / / ERR• \ \ //
7 SLIPLINE EXISTING 60" DIA CMP INLET , , � ' _ / I/ / �\ ✓ /� BRIDGE 3C14
- - -�� , CONDUIT WITH NEW ASTM D-3350 , - / / / //� //� (NO ANTICIPATED WORK)
N o
- - - - , - - - - - - - - - - - - / 54n DIA DR-32.5 PIPE
- - - - - � �2 �� 104± FT RETAINING WALL
Q - - - - — — _ �/ // / 60± FT 1 \ 1 \\\ \ \ \
/ VEGETATION
i _ i
' '' / / /�/ — _ - - � ' \\ � / / / / l I I / I J I I / / , PLANTINGS _ \ \\
J SLIPLINE EXISTING 36" DIA CMP LOW LEVEL _ �/ - -/ / / / l l I II / �/ l I I /// �- \� \\
00 DRAIN CONDUIT WITH NEW ASTM D-3350 - - - - '\
30" DIA HDPE DR-32.5 PIPE _ - \ — _
w - - - - - - - � � / / � - � _ _ _ - - - _ - � / -' �/ / — I I �/ / �� / // ���//�/�// '� \ BRIDGES, \\\ \\ BRIDGE6 \
o - �, / - _ - l l / \\ \ 1 (SEE SHEETC4.1) /
_ _ _ _ _ /' ,/ / / / \I �� �%/j/ 1 (NO ANTICIPATED WORK) \ _ PROJECT NO: 22-0363.001
z —2 7 5 / / - - - - / � � 1 ( �l��� �� / \ l ) J i - i \ �\ — // SCALE: AS SHOWN
PROVIDE CLASS B RIPRAP WAVE PROTECTION I / t \ III ( / / / /� \ ( / �\ 1\� / /
(- ALONG UPSTREAM EMBANKMENT 5 FT ABOVE BRIDGE 4— _ _ _ _ _ — - // /� / I I I / / �� I // / // \ I I( //, I III / I //j DESIGNED BY: DAK
Q
J I AND BELOW NORMAL POOL ELEVATION OF 284.0 / / / (NO ANTICIPATED WORK) / J J� \ \ l ���/�j� \\ II I / ( � l �j / DRAWN BY: KHH
I
CHECKED BY: DJR//lx
> SHEET TITLEoFn _ - - -/F
- \ \ \ / // ...........
II MVE�■VE�■VE�M SHORELINE REQUIRING AQUATIC VEGETATION PLANTINGS
, ;% c
PROPOSED SITE PLANS
co / /
N . � RR .RR 6 %% / R . SHORELINE REQUIRING RIP RAP INSTALLATION
m `` \ , — — �RET■RET■RET�
�, .� �•, \ --____ x 270.7___- I I SHORELINE REQUIRING RETAINING WALL INSTALLATION MI / \ I I
� � P) / / I \ X) E00111I C300
1 PROPOSED SLIP LINE SITE PLAN LO ° 1°' 2°' 4°' 2 SHORELINE FORTIFICATION PLAN 0 150' 300'
U SCALE: 1"=20' SCALE: 1"=150'
x SHEET 3 OF 8

✓ I 11 I / /� i� \ \ 1 I l \ \\ \\\ \\\� �� / ( \ \ NOTES
— \ \ \ I I / — \\ \� 1 \ \ \ \ \ \ \\ \ / / 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.
2. TREE STUMP REMOVAL AND REGRADING TO CREATE A MORE GRADUAL
NO ROAD CLOSURES ARE EXPECTED FOR \ \ I 1 \ \ \\ — — i ^� \ I A. MORTON THOMAS AND ASSOCIATES, INC.
DURATION OF PROJECT EXCEPT FOR / SLOPE FOR ACCESS. PATH SHALL BE RETURNED TO PRE-CONST. CONDITION
\ \ \ I /
CONSULTING ENGINEERS TREE STUMP).
L INTERRUPTION D 3. GRASSY AREAS SHALL BE MOWED FOR MATERIAL STORAGE AND ACCESS 100 GATEWAY
PARKWAY, SUITE UITE 200
VEHICLES AND MATERIAL DELIVERIES. CONTRACTOR ACCESS "A" R HMOND, VA 3235
TO LAKE BED FOR SLIP I // / O 4. CONTRACTOR SHALL RETURN ALL AREAS TO SIMILAR OR BETTER CONDITIONS PHONE [phone]
\ \ l LINE OPERATIONS \ / / / THAN PRE-CONSTRUCTION CONDITION WHEN WORK IS COMPLETE. EMAIL: [e-mail]
\� \ \ \ \ \ \ \ \ \ \ , I I I \ \ \ \ \ \ \ \ \ I i �� ) I O / 5. CONTRACTOR SHALL COVER THE WALKING PATH WITH RUBBER MATTING
\\\ J \\\\ \ \ WALKPATH ACCROSS DAM SHALL BE I / \� / 1 I I I I / WHERE AND WHEN WORK WILL BE OCCURRING. _
CLOSED FOR THE DURATION OF PROJECT I 1 ( \ 1 \ \\ \ 1 �/� \ \ 1 O
FOR PEDESTRIAN SAFETY. ADEQUATE 6. CONTRACTOR IS RESPONSIBLE FOR DOCUMENTING EXISTING CONDITIONS
SIGNAGE SHALL BE PLACED AT EITHER END. 1 �� / 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
s� �� �/ 1 STORAGE AREAS J \ BUILDINGS AND ALL STORED MATERIALS AND VEHICLES.
AERATION PUMP
AND MANIFOLD _ B 8�t \\ \ \ / / ) 8. EXISTING PAVED PATHS AROUND EPA BUILDINGS ARE FOR EMERGENCY
— — — — \\� _ TREES IN THIS AREA ACCESS AND MUST REMAIN CLEAR AT ALL TIMES. c m
� B-3 - _ /� SHALL BE MAINTAINED / 9. WITHIN LIMITS PROPERTY ALL STORED MATERIALS MUST BE STORED ONIndian , „ , ,
NO VEHICULAR TRAFFIC OR HEAVY _— \ AND PROTECTED I GRASSY AREAS AS CLOSE TO TREE LINE AS POSSIBLE.
\ J l JII J ��/ EQUIPMENT IS PERMITTED ON FIRE LANE _ , _ J \\ �� I 10. NON CONSTRUCTION RELATED VEHICLES SHALL UTILIZE CAMPUS PARKING
/J / / / - ACCESS DRIVE ADJACENT TO MRI BUILDING  COFFERDAM \ 1 \� \ LOTS AS DESIGNATED AND CARPOOL TO AND FROM WORK AREAS BEHIND
EPA BUILDINGS.
►`�` RETRET■RE \� i CONTRACTORCONTRACTOR 3 ACCESS PATH DAREA #1-----PROVIDE TRAFFIC ; ------PARKING 0
\ \
CONTROL BARRIER 111 11 j%`` 'Q Y
CONTRACTOR ACCESS "C" "O I I
� ' 1 , ,
TO LAKE BED FOR SLIP �N,CAR
// / // / /��� / _ \ I ► �` � `. LINE OPERATIONS - - 1 / I J I I I 1 J ) \ \\ /
� , - - - ,�, ,� I I / ( � � I / ► I I 1 \ \ � � ;
CONTRACTOR ACCESS "B" _ _ - _ -I 5 / I / I �� III I \ l 1 1
I / l \I III \ \ \ \ / / \ / \ � ) /I T LAKE BED FOR LIP ¢ SEAL
O O SLIP
I/ /��1�1(/f/—J J//J/1//1I/I/I I//1 // I // I I1I1I\II 1I \ \ \ //l/ / — _\ > \> I II I I I /��\\ \1I I I I III( ;; ;; ; ; ;; ; , PP;� \ \\ \\\ \ , � ' I ► l/ I I/II I `I 11\ I1 II I I I r (1\�� \\\I I\ ;;O�,-,o�q04. 0K2R1I5
(NO ANTICIPATED WORK) GZWS
�
3-
,,,;�
l
I
\ \ I
I
//�III�ti
�BRID E 8LINE OPERATIONS AREA #z ,CONTRACTOR
CONTRACTOR ACCESS PATH 'IF"
/
ACCESS PATH\\ \ CONTRACTOR
NIH ENTRANCE ACCESS PATH � E"
l� REPAIR NIH DAM
\\ O O \ PORTIONS OF WALK PATH SHALL BE I l I ' ' 1 5 \ I \ \ \ \
CLOSED AS REQUIRED FOR CONSTRUCTION J�� 11 ' V \\ \ \ I \ \\ \ \\ \ \\ INLETS AND OUTLETS
/ J - / - 3 - �� \� / / 1 \\ \ \ TASK ORDER C100809
OF SHORELINE STABILIZATION MEASURES 1 I I/ ' ; ' / / � \ �/
t� / \ \\ I I \ \ DAM INVENTORY D RHA 1 05
\ 1 \ \\\ CONTRACTOR'
I FEDERAL NID# NCO1666� ACCESS PATH G
DURHAM COUNTY, NC
� 3 = ��/—
CONTRACTOR /
THE CONTRACTOR SHALL RESTORE ALL ACCESS
PATH " " PORTIONS OF WALKPATH II\I\I PERMIT SET
SHALL BE CLOSED AS PATHS BACK TO ORIGINAL CONDITIONS.tiil
t REQUIRED FOR SHORELINE I 1 \ \ \ \\\ I
STABILIZATION ACTIVITIES
/ \ \ BRIDGE
NO ANTICIPATED WORK)
I; ; BRIDGE 7
z ( 0 ) SUPPLY TUBING (TYP) I; ; (NO ANTICIPATED WORK) I \ \ \ \\\\ \\
i I / \ I\ \ \ \ I \ I \ \ l/ /
NATIONAL INSTITUTES OF HEALTH
AREA #3 ` �\\
\ ' \ 3 L J 1 ( \ \\\\\\ \` \\\\ 111 T.W. ALEXANDER DRIVE
I BRIDGE 2 \ / \\ \\ DURHAM, NC 27709
/� � � , � , \ � . \ \ � \
(NO ANTICIPATED WORK) Q / , \ 1� I I \ \ �\ \ \ \ \ \ \ [phone]
/ � \ \ \ \\ / � ✓ I I I I \ / /// I J �/ // APPROXIMATE LOCATION OF
AE R,AT,IO,N DIFFUSER (TYP OF 10)
DESCRIPTIONN CONTRACTOR MARK DATE
ACCESS PATH "H"\\
"jCD 5
i
i // �\ \ \ \ \\\ \ f \ 1 i l i / / BRIDGE 3 \
o (NO ANTICIPATED WORK) (
N / \ \ \ \ ��\ ^� \ \ / CONTRACTOR
ACCESS PATH "K"
L
FAREA #4
m z \ \ B RIDGES
(NO ANTICIPATED WORK)
wo / / — \\\ _ \ J
I I
\,
I
II I I PROJECT NO: 22-0363.001
z 3 ��(SEE
BRIDGE 6 \ ` SCALE: ASSHOWN
1 \ — / / \ \ DESIGNED BY: DAK
SHEET C4.1) DRAWN BY: KHH
w BRIDGE 4 �� 1 \\ y // _ — \ \\ I I \ 1 ) I I CHECKED BY: DJR
0 (NO ANTICIPATED\WORK) , \\ I I / / ///� I l� // / — _ �� \\� l // / 1 I I SHEET TITLE
cn
� � -��>
\ \ \ 1 1 / / / / I /� /� \\�\� //// I /
I � —. � \\ \ \ / / / /j /i � // / /i � 1// / � -- � I I III 3
\
_ \\ SITE ACCESS STAGING
co
I l ,, ,; AND AERATION PLAN
EXISTING ACCESS PATH L . / _ \ \ \\� ���\� \ \\ 1 \
NO TREES WILL NEED TO
cn
BE REMOVED HERE.
% ////
I
Lo
1 0 100' 200'
PROPOSED SLIP LINE SITE PLAN
U
■
SCALE: 1"=100'
x SHEET 4 OF 8

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 7 ELECTRIC EL. N/A
OUTLET PIPES SIMILAR TO EXISTING CONDITION.
300 DEMOLISH AND RECAST SEE ENLARGED DETAIL 4 300
SLOPED CONCRETE SLAB EXISTING GRADE PROPOSED WAVE PROTECT ON
AROUND NEW OUTLET PIPES UNDERGROUND GUARD RAIL SEE DETAIL A. MORTON THOMAS AND ASSOCIATES, INC.
_ _ NORMAL POOL CONSULTING ENGINEERS
29 PROPOSED SAND i — — — — _ NORMAL
P 290 100 GATEWAY CENTRE PARKWAY, SUITE 200
CONC. SIDE WALL FILTER DIAPHRAGM. `-- - - -= -- _ RICHMOND, VA 23235
15" RCP SS 60" CMP - ------- — — — — — — — — 0 PHONE [phone]
CONC. SILL SEE DETAIL
28 INV. 275.07 INV. 284.0 UNDERGROUND ------ — _ _---- _ 280 EMAIL: [e-mail]
— — — —
CATHODIC (CALC) 60" CMP TELEPHONE EL. N/ - -INV. 267.77
27
- - - - - - - - J LOW LEVEL DRAIN VALVE INSIDE EXISTING 60" CMP INLET CONDUIT 60 CMP
CONCRETE R SER TO REMAIN PROPOSED SLIP LINE WITH ASTM D-3350
26 EXISTING OUTLET CONDUIT SHALL BE 36" CMP 54" HDPE DR-32.5 PIPE EXISTING 3 " CMP LOW LEVEL DRAIN cm
INV. 272.95CUT AND REMOVED TO THIS POINT EXI-S)TING 60" CMP OUTLET CONDUIT Z 260
WATERLINE 60" CMP OUTLET CONDUIT PROPOSED SLIP LINE WITH ASTM D-3350 INV. 271.35 CONDUITcmc
ROPOSED SLIP LINE WITH INV. 273.0
FLANGE OR LOW ASTM D-3 50 30" HDPE DR-32.5 PIPE An Awrican Indian EL. N/A INV. 266.95 54 HDPE DR-32.5 PIPE TRANSITION Corporation
25 250
0+00 1+00 2+00 3+00 3+50
1 PROFILE THROUGH DAM OF PROPOSED SLIP LINE o 15' ao'
000001011 .
SCALE: 1"=15'
� \ 3 w W�� w r/ w_ w— w PORTION OF EXISTING 60" CMP OUTLET EXISTING GRADE // %\� \% \%/ %`%%��+������,,,
/ C4.0 / �1- STEEL GRATES SHALL BE PRESERVED AND MODIFIED PIPE TO BE REMOVED (APPROX. 20 FT) \ \ \ \ �• N CAR •,
I / % AS NECESSARY TO BE REINSTALLED ON END OF NEW
X I , / OUTLET PIPES SIMILAR TO EXISTING CONDITION. — — — — — — — — —
SEAL
N_
rr / WWF 6 x 6 - W2.1 x W2.1 ��� GROUtPLUG AT END OF 040215
r CONC. SIDE WALL PROVIDE RODENT GUARD �� 2 SLIP-LINE (2 FT LONG) o 9&r2R�'1�;Z
rr AT END OF EACH FILTER DRAIN PIPE, SEE DET < o '� DEMOLISH AND RECAST OG •S���`��
�� SLOPED CONCRETE SLAB �. KR�t���
i� AROUND NEW OUTLET PIPES PROPOSED SAND
SKEW CUT END OF FILTER DIAPHRAGM.
r CONC. SILL PIPE AS SHOWN. �!` 1/8"/FT SLOPE— z (ASTM C-33 FINE
AGGREGATE)
EXISTING BOTTOM
- - - 6"0 DRAINS a SLAB TO REMAIN
� REPAIR N I H DAM
EXTEND HDPE SLIP LINE TO - - \ \ \ \ \ \ \ \\\ \ 4'-0" MIN
THE SAME APPROX POINT AS � o o �< / / // //\ �� �//�/ / / // ,� I � � /\/ / INLETS AND OUTLETS
THE EXISTING CONDUITS. o a \/\\/\\/\\/\\/\\/\\/\\/\\/\\/ /\\ \ \ \\ / \\ \\/\\/\ TASK ORDER C100809
DAM INVENTORY# DURHA 105
BOTTOM OF FEDERAL NID# NCO1666
12" LONG #5 REBAR DOWEL, DRILLED AND COLD JOINT BETWEEN EXISTING NEW 54" HDPE DR-32.5 EXISTING OUTLET CONDUIT SHALL BE EXISTING PIPE
- - - - - - - - - - - - GROUTED 6" INTO EXISTING SLAB AT 18" AND NEW CONCRETE SLABS SLIP LINE OUTLET PIPE CUT AND REMOVED TO THIS POINT DURHAM COUNTY, NC
SPACING PRIOR TO CASTING OF NEW SLAB
I II 3 SLIP LINE AND GRADED FILTER DETAIL AT END OF OUTLET CONDUITS
SCALE: 1/2" - 1'-0"
I I I
I
EXISTING 60" DIA CMP EXISTING 60" DIA CMP PROPOSED 54" HDPE
I ILJII I j\ = • :' IQ' /\\/ PROPOSED 54" HDPE SLIP LINE PIPE 4" SOLID PVC 4" #67 STONE PERMIT SET
4"DIA SOLID PVC _ - - I _ �/ \//\\ \ SLIP LINE PIPE / DRAIN PIPE ALL SIDES
I `n I PROPOSED SAND �/\ /// ; ' _ • ' //�
�- FILTER DIAPHRAGM ` • .
4"DIA PERFORATED �I I �/\ :� , 2'-0" ASTM C-33 FINE
PVC WITH ENDCAPGROUT PLUG AT END OF
TYP AGGREGATE
z ( ) SLIP-LINE (2 FT LONG) \// w s \//�
REVISED —
} +� \/ NORMAL
ELEV. 28' \ \ \ o o NATIONAL INSTITUTES OF HEALTH
Y = qUT AND REMOVE PORTION NEW 54" 111 T.W. ALEXANDER DRIVE
=
PIA HDPE SLIPLINE PIPE. CUT FLUSH D 9
WITH INSIDE CONCRETE SURFACE URHAM, NC 2770
[phone]
EL. 284.4
CD
, /\\/\/\/ �\ EL. 284.0 /\ MARK DATE DESCRIPTION
EXISTING '� // /,//r� //\/ . \//
_ — _ \ NORMAL POOL \ \
REMOVE EXISTING — — — — — REMOVE EXISTING �\ • \ / /
CONDUIT BACK TO CONDUIT BACK TO \// ELEV. = 284.0 •%
oTHIS POINT _ THIS POINT �/� : ` /�. 4" PERFORATED
CD VA DRAIN PIPE
M
CD SECTION A-A'
IN
CN OUTLET STRUCTURE AND SAND FILTER PLAN SLIPLINE MODIFICATION DETAIL INSIDE PRINCIPAL SPILLWAY RISER FILTER DRAIN DETAIL
2 1/4" = 1'-0' 4 SCALE: 1/2" - V-0" 5 SCALE: 2" - 1'-0"
U
Q
U
0
J \
00 \Z
C7
W
GASKET PROJECT NO: 22-0363.001
z
SCALE: AS SHOWN
w DESIGNED BY: DAK
Y
Q DRAWN BY: KHH
J
CHECKED BY: DJR
w
> SHEET TITLE
U
W
0
0
co
0
SECTIONS AND DETAILS
N
"SNAP-TITE°" PROPIETARY "SNAP-TITE°" WATER
m HDPE PIPE TIGHT JOINT WITH GASKET
z
co
PIPE JOINT DETAIL
C400
U 6 NTS
x SHEET 5 OF 8

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 SHALL NOT BE STEEPER THAN 1:1 PLACE E WETLAND ZONES AND SPECIES
MASONRY MORTAR STACKED NATURAL STONE NOMINAL TOP OF WALL UNDER
FABRIC UNDERR RIPRAP
(ASTM C270, TYPE N) IN RUNNING PATTERN ELEV. 286.0
18" LAYER OF NCDOT DEEP POOL
MASONRY MORTAR CLASS B RIPRAP \ QTY TYPE
(ASTM C2710, TYPE N) ��\/ 72 NUPHAR ADVENA (SPATTERDOCK) HIGH WATER: Landwarcf shift of plant communities A. MORTON THOMAS AND ASSOCIATES, INC.
72 NYPHAEA ODORATA (WHITE WATER LILY)
CONSULTING ENGINEERS
m \ SHALLOW WATER LOW WATER: Lakeward shift of plant communities 100 GATEWAY CENTRE PARKWAY, SUITE 200
NORMAL POOL 0 � NORMAL POOL / ///�, '�/ +i N NORMAL POOL \\/\��\� QTY TYPE RICHMOND, VA 23235
- , PHONE [phone]
ELEV. 284.4 o ELEV. 284.4 10 //\\ J, / \/ o ELEV. 284.4 1 \�\\� 287 PELTANDRA VIRGINICA (ARROW ARUM) UPLANDS , SHRUB WET MEADflw ! EMERGENT MAR 5 H A Q U AT I C
i \ Woad shrubs ! Shrubs Sedges Emergent perennials Floatin leaved& EMAIL: [e-mail]
N \/\/\/ \\ m \�\ 288 PONTEDERIA CORDATA (PICKEREL WEED) Woody shrubs 9 g-
�/ � w /\\/\\/\\/\\/\\/\ �; �\\ \\�j Trees � Vines Grasses submersed plants
/ / / / / / Sedges : Rushes
w \\/\\/\\/\\/\\/\\� /i �j��j\� SHALLOW LAND Herbs
— n \//\ \ \ \/ —
I ilI i p \\, QTY TYPE c
N - /����j\ 192 ASCLEPIAS INCARNATA (SWAMP MILKWEED)
li STACKED NATURAL STONE a it o \/\/\/\/ - / \\\j� 191 EUPATORIUM PERFOLIATUM (BONESET), , �
192 LOBELIA CARDINALIS ( CARDINAL FLOWER)
IN RUNNING PATTERN AT " \\ \ \\ 0
\�% •' y 11
• • • • 1:10 BATTER a /\//\/ \\/� /�\ \ WATER'S EDGE f . r 1\ ! 1 High Water
�\ \ QTY TYPE di'I�I i f 1 — — — — —
\ 1 NORMAL
SOIL OR STONE // \\�\\\ /\\�\� 191 CAREX CRINITA(FRINGED SEDGE) + f Low Water
CONCRETE RETAINING / / / �\ 192 IRIS VERSICOLOR (HARLEQUIN BLUEFLAG r rCorporation
WALL FOUNDATION #4 x 12" LONG REBAR 2,_0„ BACKFILL �\ \,� / \\�/��END AS REQUIRED TO 192 JUNCOS EFFUSUS (SOFT RUSH)
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 NOT TO SCALE SECTION 2 NOT TO SCALE 3
GROUND LEVEL
EXISTING 60" CMP PIPE " �` CAR
NEW 54 HDPE DR-32.5 � `
SLIP LINED PIPE 6" THICK CONCRETE PAD '-
� ' ' '� ` *Y.:'" �:. EXISTING 36" CMP PIPE 12" ALUMINUM LOCKING WELL ¢ SEAL
18 THICK CLASS B RIP RAP 5 FT , ��_:�_���}' �� -
EXISTING GROUND NEW 30 HDPE DR-32.5 = _
ABOVE AND 5 FT BELOW ``f � �'x;,_:, CAP (ROYER #12LC OR EQUAL) - -
NORMAL POOL ELEVATION ti''3Y SLIP LINED PIPE _ = 040215
+: 6" PVC SCHEDULE 80 PIPE �� J 5/(r/3
\\//\ +1 2" DIA. SCH 40 PVC PIPE ' ,,�A• KR�S��,
NORMAL POOL
\ \ \ \ \ $*
284.4 � �� .;��� BENTONITE CEMENT GROUT
EXTEND TO 5 FT BELOW
GROUND SURFACE
l� REPAIR NIH DAM
/ // +I �` BENTONITE ANNULAR SEAL
� •� �
I..L t.,•a,.,'. w � '
11 INLETS AND OUTLETS
PROVIDE N C D OT TYPE 2 6 MINIMUM BORE HOLE
G EOTEXTI LE FABRIC LINER /\\// , TASK ORDER C100809
/ / / / / / / / / / / / / / / / / i ?# h _
FILLER SAND
\\\\\/\\\,\\\/\\\ \/\\%\\%\\%\\%\\%\\%\\%\\%\\ � \� •°:� : . > ,.�'�� — DAM INVENTORY# DURHA 105
GROUT ANNULAR SPACE 2 DIA SCH 40 PVC WELL SCREEN = FEDERAL NID# NCO1666
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 IEZOMETER —
4 1/4" = V-0' 5 SCALE: 3/4" - V-0" &EN05T 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 USING SANDBAGS OR STANDARDS FORMWORK. PERMIT SET
APPLICATIONS USING SANDBAGS OR STANDARD 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 �
z // (SPA @ 10" O.C.) � \\ BRIDGE BEAM
oC.
�\ #5 REBAR @ o / „ NATIONAL INSTITUTES OF HEALTH
150MIN /\ 10" MAX SPA. /\ 1 -� 111 T.W. ALEXANDER DRIVE
a_ 8 /\\/ MIN DURHAM, NC 27709
o C4.1 o i\\ FORM USING [phone]
o \\ o SANDBAGS OR
o NOTE: /\/ /\ < e STD FORMWORK
N ONCE LAKE LEVEL IS LOWERED AND SEE NOTE \ \ MARK DATE DESCRIPTION
N FOUNDATIONS ARE EXPOSED \\ oa /�\/� /�
PROPOSED CONCRETE RETAINING WALL CONTRACTOR SHALL PERFORM FIELD \� a \\ \\\\\ \\ 1/4" STAINLESS STEEL BOLT
SHOWN FOR NORTH END OF WESTERN \ FORM USING POTENTIAL L1XISTfPCfd �\ \� (MIN 6 LONG)
o VERIFICATION EXISTING CONDITIONS SANDBAGS OR GROUND LINE
ABUTMENT. OTHER LOCATIONS SHALL AND REPORT FINDINGS TO ENGINEER SEE NZST \\�\\\ \ 1/4" STAINLESS NUT AND WASHER
o BE ADDED BASED ON FIELD POTENTIAL EXISTING \ \\�� STD FORMWORK /
co CONDITIONS AND BUILT ACCORDING
co TO DETAILS SHOWN HEREIN. GROUND LINE
N BRIDGE 6 RETAINING WALL SECTION BRIDGE 6 EROSION REPAIR DETAIL RODENT GUARD
� /_ 8 3/8" = 1'-0" 9 NOT TO SCALE 1 NOT TO SCALE
o II t
O '�''',i.,`t' .. :; } -t. _ t I '." '1 t. _ 3.' -•,, 't ••ry', " ,"�\ _, ' ' 4a_.-
7.
•^ Wit. •.�., - ` .> _ :' d.•
mx; _ - •t.- - /.: J tom,. _ , - • ..•,r:' - '•.4 r \ -
�•' ally .
,•'�•, /'y ; may'~ J :,: ',<' ; _ ';' _ ,•. PROJECT NO: 22-0363.001
F• ,'
= PLACE GROUT OR FLO`l�/i4B1fL • I ' + �''` - r� .. ' t. z _ <ti, -�; SCALE: AS SHOWN
ERODED AND UNDERMl, 1fAR�AS.' - .bs ''K' , z;:; `.y - - ".'_- �'
w ,- ' :i f;_ �ti. '_: ;: _ DESIGNED BY: DAK
TO STABILIZE ABUTMENTS �r;: ••f' ,•=�.'-• �1. ff �_.�• - ���'
N� D'<: .,' _r.,. '.fir :•: t.' t•l.• '�• =t' - ,
Q - :; =1 - ;y` :�,' '_,; DRAWN BY: KHH
PROVIDE STABLE FOUNQ ��TfON.-JF fit= -
t.
CHECKED BY: DJR
i
. .
RETAINING WALLASLU
NEQ
> _ SHEET TITLE
.k'
---,��-
ADDITIONAL SECTIONS
co
I I AND DETAILS
o
N EXISTING BRIDGE 6 `----- -- ' EXISTING BRIDGE 6
WEST ABUTMENT EAST ABUTMENT
D
Go A,&1
SANDBAGS OR CONDENSATE PIPE
Q STANDARD FORMING SUSPENDED FROM BRIDGE
co
BRIDGE 6 PLAN FIELD VERIFY ALL DIMENSIONS
0 7 3/8" = V-0'
x SHEET 6 OF 8

�� �\ \ \ \� \\ \\ \\ VEG.VEG.V� SHORELINE REQUIRING AQUATIC VEGETATION PLANTINGS \\ 1 l / // / / STAGING AND STOCKPILE AREAS
.
AREA A = 0.54 ACRES (SEE NOTE)
264 9' \\ \ \\ \ \ \ \ \ / / .RR .RR .RR NO SHORELINE REQUIRING RIP RAP INSTALLATION 1 \ \ ( //� / �� AREA B = 0.50 ACRES (SEE NOTE)
/ S /
I 1 SF / AREA C = 0.50 ACRES (LAKE PERIMETER)
D/ \\ I I / X/ \\ \\ �� �� \ l \ .RET.RET.RET. SHORELINE REQUIRING RETAINING WALL INSTALLATION / \
�� \\ \ \ \ \ �\ � , i I — 111C -'� NOTE: INDIVIDUAL TREES IN THESE
SF \ / / / \ \\ \ ` ( I \I I \\ \ � _���/� jAREA A CE AREAS SHALL BE PROTECTED ACCORDING A. MORTON THOMAS AND ASSOCIATES, INC.
� \�� %� �ii ///�I TO SECTION 6.05 OF THE NC EROSION CONSULTING ENGINEERS
\ \ _ 0� ( / \\\� OTHER DISTURBED AREAS — - 100 GATEWAY CENTRE PARKWAY, SUITE 200
I i - 1 1 \- 1 = AND SEDIMENT CONTROL PLANNING
\ I CT1 - - - ' / _ w- / / I \� AREA D = 0.31 ACRES = CW CONCRETE WASHOUT ° \� 23235
Al�*117
_ - cp X�- - `' AND DESIGN MANUAL PHONE 08o4 276 6 31
iCP CP Goy XX // / AREA E = 0.26 ACRES _ \ \\\ \\ \ EMAIL: [e-mail]
I END O // _ _ / AREA B CONTRACTOR SHALL ENSURE
/ \ _ SF ` � � I- I �� �I_ ��— '��/ I DESIGNATI 1 // — _ ��� LOD CE PS TREES IN THIS AREA ARE
p p—X� i /� I / L I —� AREA D —` =J PROTECTED FROM DAMAGE
P C C _ / � � - \ SIGfLINO�/ I I \ I ,, �°pD TP
W \ CP — - - � W W _w \ 11 i / LoDj
\ — W_ )i/ X / `� \ / / / 1 I I I / O ,� AREA ELOD
1 I -------------------
-E)_
2 70— - / / // �27 5 _ _ _ _ , _ , / / \ - III PROVIDE PERMANENT SEEDING FOR ALL
\ - - - - - - - i PS / / / — / � / \ \ I
\ _ _ _ � / _ _ , , DENUDED AREAS AROUND LAKE AFTER SF
_ - - CD _ / / ' CONSTRUCT OUTLET PROTECTION _ _ - -ZS� � 1 / _�� III COMPLETION OF SHORELINE FORTIFICATION.
� - - - - - -0$-4- - - - - -0 - - - - - -o _ _ / ACROSSCONCRETEOUTLET, SEEDETAIL — /, , , , , ,
SF X \ I
FTI
— — — — — — — _ — /� ' — ' i L— I l / \ I I 1 1 1 ' '1 1 Ps
\\\
- - - - - - - - - - - - - - - - _ _ _ _ _ - - - - - - - - - - - - PROVIDE PERMANENT SEEDING _ / \ // 1�lll I / ; ' ; ; ' / \\ LI /' `�` NCA/Q
- - - - - - - - - - - - - - -_ — 280— - FOR ALL DENUDED AREAS
_28 _ _ - -_ __ _ _ _ _- _- _- _- �_- _- _- _ - _ _ _ - -_ � � ��I \
- - - - - - - - - - - - - - - - - - - - - _ _ - _ - _ - Zg�, - - \\ \ \ \ I �i /,� ; ; PROVIDEAGAP IN SILT BRIDGE8 - ¢ SEAL
-
_ - - - --� - - — _ Z85 _ = - - - _ _ _ 1 �` 1 , 1 �/ / FENCE FOR ACCESS (NO ANTICIPATED WORK)
s� _ - - - - — — - - - _ - - - / / PS I I CONSTRUCTION ACCESS - - 040215
- - - - - - --�s +`.�S 85— —_ _�_ _ _ _ - - - _ —_ __ __ _— _ _ __ _ _ _ _ _ B-8AIY — / / %/ ) / % �' / SF ; 1 1 II \ OR3'��
285 �� -` � / � — / / ' / /� / �x ; ; ; O / O - �� `�J`
- _-_- - - - - - _ _ _ _ _ _ _ SS�-��- - o- - _ - : - - - - _ - 1 1 /OA. KR\S� ,,
— — — — — — — — — — — — — ' — — — — — — — — — — — — — — S _ - �� ���_ _ _ — _ _ _ — — — / / / _ / I (
_ - - - - - — — — — — _ _ - - - - _ _ ss is- , 5 /
_ - - -290- _ , - - - -_-_ - _ _ _ _ _ - -SS ��SS` p " I /� \�\/ / I ( I / / /// I 1 1 1
- - - - - - - - - - - - ' - - __- - - - - - - - - - - - - - - - � s
- - - - - - - - - - - - - - - - - , , - - - 95_ s
- - - - - - - - - - - - - - - - - _ _ REPAIR NIH DAM
—295 — -
- - - - \\ INLETS AND OUTLETS
- - - - - - - - - - - - TASK ORDER C100809
- - - - \ \ DAM INVENTORY# DURHA 105
_ _ _ - - - � - - - - o- - _ _ _ - - I . I �� � \\
- _ _ _ _ _ _ _ - o �1 I 1 FEDERAL NID# NCO1666
- - - - - - - _ _ _ _ _ - \ � _ J O - - 5 oB-9 EP i I BRIDGEI ; ; '1 ; PS \�\ \ / I ( \ \\ \ \\\ DURHAM COUNTY, NC
_ - _ _ - _ — Ste' (NO ANTICIPATED WORK)
— UE —�UE UE
- - - - - - - - - - - - - - - - 0 _�9,,E=� o _ —2 5✓ �j�8� \� \\� ��� ---' ° \\\\\ III ( ( �� ,� l J
�DBE �� -
_ _ — — 0 HH 295. uEDB/ _ _ �� / --' BRIDGE 7 All
METAL 295 0 ���8 / r ii/� - NO ANTICIPATED WORK
PERMITSET
I�
IVE SF
DB
x DB B
9 295.43 uED
HH g B
DB� Ps
UEDB H / _ —� _ � ' ' — ' — 9O— _ I I I I / I I I I / } / /// 1� I I I �;
, , / / ? I / / BRIDGE 2 I A.RR .RR \ \
J - _ _ �, �y i 60 / (NO ANTICIPATED WORK)
} B- _ - - _ _ - _ _ _ - 1 //� / �� I ' \—X �\ \ NATIONAL INSTITUTES OF HEALTH
Y - - - - - - - - - - - - - - - - - - - - - - - - � - - - - _ - - - _ _ _ - - - - G 111 I / I / / / I III
� - - — — — — — — —
- - �- - / _ - - � _ - - _ � � � ' � oo�� I ( / / '�, \ \ ��\ 111 T.W. ALEXANDERDRIVE
- - - - - - - - - - - - - - - _ _ — — — _ _ — _ — _ \ � \ \\ � % DURHAM, NC27709
00 — O _ ' —_ _—_ — — L I S F \ \\ \ \ J [phone]
� O -
- - - - — —
I - - - - - - - - - - - - - - - - - -- _ _ - / � / I I l II l / II- - - - - - - - - - - - - - - - - - - - - - - - O /
CD
N - - - - - - - - - - - - - - - - - - - - - - _ g - - - / G O — SOD /
\ - , - _ _ _ I I � / \ ✓ �� BRIDGE 3 MARK DATE DESCRIPTION
rn - - - - - - - - - - - - - - - - - \ l
_ _ _ - - - - GO-1 �O � ' -� // �/ (NO ANTICIPATED WORK)
— —GOl—Go-l�O GO��OO I _ �OD� — i ZUO — / / �\ // I / / ' / / �/ / // /� \\ \ \\ \\ I \\ \ \
Lo
•- - %�- - - _ — _ _ , - ' _ __ - - l ` LAKE PERIMETER FORTIFICATION DISTURBED AREA
o /%/i — / � � - - - - - _ - - - ASSUMED8FT WIDE X2400LF = 0.50AC / I / ( II iBRIDGE 4
N - - \ / ( ) I I l NO ANTICIPATED WORK �� ��
N CLOD—`O� � ' / \2 / / - - - - - - _ — i / — _ — / / ( II 111 / /I (. \ ) � \\\ \ _ \ \
ACCESS PATHS AS SHOWN ON SHEET 3.1 WITH l \
o —LOD- - - - �tAD- SUOD�Lc _ _ _ _ _ - / \ \ � � / � _ _ _ - ASSUMED 12 FT WIDTH) = 0.27 AC / I I � / \X \ \\ \ \ \ \\\
PROVIDE SILT FENCE AS —280— — — _ _ - - _ _ J I / /�// j��j \\ ✓//� \\\\\
TOTAL AREA C = 0.77 ACRES
� REQUIREDAROUNDSLIP - - - - - - - - - - - - / / / _ _ - - w\ SF / / / �� / — _ � �� / �� / /�/��/� �/ / '�\ � \ � _ _\� \� \ BRIDGE
� � LINING OPERATIONS \\
o _ aa, / _ _ _ _ _ — / / / / / / / \\ \ 1 1 BRIDGE 5 \ (REFER TO SOW) I
o / \ , / o� -/ / I �/ / / j/ \ I I (NO ANTICIPATED WORK) \� / / -
m EROSION CONTROL LEGEND
1
/ ° - - - _ _ CONNECT BYPASS WITH SANDBAGS - ^ - - - TITLE KEY SYMBOL STD. &SPEC. UANTITY
w SF , �, - � _ / / - N \ \ \��� �//// / /o FROM 12 PIPE TO INLET OF LOW _ -
/ LEVEL DRAIN - \ _ - - _ ° �° // // LIMITS OF DISTURBANCE 2.38 ACRES / PROJECT NO: 22-0363.001
-Z / ,j _ _ - / - _ i / �� I I \ / \ // SCALE: AS SHOWN
O uT / / \\� / J I I I \\ \ / / / DESIGNED BY: DAK
PROVIDE TEMPORARY 12" PIPE AND 1 O / TREE PROTECTION Tp 6.05 1200 L.F. \ / r /// ✓//�\ �/
J I �� / i� VALVE THROUGH EMBANKMENT Q / /� / DRAWN BY. KHH
UA
♦ I �o - - - - FOR DAILY FLOW / CONSTRUCTION ENTRANCE CE 6.06 3500 L.F. I / \ ` ( \\\ xx
// CHECKED BY: DJR
/ / I I\ I I III / / �/ / SHEET TITLE
♦♦ ♦♦ / / / / - �/ ' \ SILT FENCE SF X X 6.62 3500 L.F. I ( l
o / / �`71 .1
o ♦♦♦♦ ♦♦♦♦`♦♦ /Oo / / / PERMANENT SEEDING/SOD p$ 6.11 1.5 ACRES
`, ♦,� EROSION AND SEDIMENT
p ♦ ♦` / ` ` X� / v—LOD LODSM PROVIDE COFFERDAM UP TO OUTLET PROTECTION OP SHEET C5.1
ELEVATION 275.0 TO RESTRICT CONTROL PLAN
♦ __
. / %% 1♦`.% � %%� -------------------p,PPROX. 190 FT FLOW FROM WORK AREA
%, \ \ - \ (ESTIMATED 230 FT LONG) _ _ t CONCRETE WASHOUT CW SHEET C5.1
r
z _____ -------------- \ I I \
��` ,`� �♦ ---- ------------------ x 270.7
1 PROPOSED SLIP LINE SITE PLAN ° 1°' 2°' 4°' 2 SHORELINE FORTIFICATION PLAN 0 150' 300'
U SCALE: 1"=20' SCALE: 1"=150'
x SHEET 7 OF 8

Steel Fence Post
NOTES: APPLICABLE AT ALL POINTS OF Wire Fence
NOTES: Filter Fabric
INGRESS & EGRESS UNTIL SITE IS C D COFFERDAM
Hardware Cloth On Ground
0, RAILROAD BALLAST OR SURGE STONE SHALL STABILIZED, FREQUENT CHECKS OF
BE USED. PAD TO BE 50'L X 20'W X 6" THE DEVICE AND TIMELY
D AT A MINIMUM. MAINTENANCE MUST BE PROVIDED.
—
BOTTOM DRAIN INVERT ELEV. — 273.0 A. MORTON THOMAS AND ASSOCIATES, INC.
Filter of 1" Diameter CONSULTING ENGINEERS
b. TURNING RADIUS SUFFICIENT TO Washed Stone 100 GATEWAY CENTRE PARKWAY, SUITE 200
ACCOMMODATE LARGE TRUCKS IS TO BE TOP OF COFFERDAM RICHMOND, VA 23235
PROVIDED. TEMPORARY CONNECTION ELEV. = 275.0 PHONE [phone]
Bury Wire Fence and Hardware Cloth II TO EXISTING OUTLET DRAIN EMAIL: [e-mail]
c. ENTRANCE(S) SHOULD BE LOCATED TO 11211 VALVE
PROVIDE FOR MAXIMUM UTILITY BY ALL SECTION INVERT — 273.2 41-011± _
CONSTRUCTION VEHICLES. oo�0 60 ob0 ob0ob0ob0 o60 b60 ob0 og(�&p
a� ob �b�8g 12" WATER PIPE
d. MUST BE MAINTAINED IN A CONDITION o� 6o- ob
WHICH WILL PREVENT TRACKING OR °P 60 o �b
DIRECT FLOW OF MUD ONTO STREETS. 0��`�G '! O&op ob 1 / \/ \/ \/ \/\/ 701� I 1 MAX LOWERED
g �g / / /\/\/\/ / /
PERIODIC TOPDRESSING WITH STONE A 488 0 40 8 08 POOL— 273.2CMC
SILL BE NECESSARY; KEEP SOME HANDY. �0 gb0 Qb FLOW
yiH o60o60 ob - - - - - - - - -
e. ANY MATERIAL WHICH STILL MAKES IT b0 ob0 ob0 008 /\\/\\/\\/\\/\\/\\/\ /\\�\\/ An Amnrican Indian Corporation
ONTO THE ROAD MUST BE CLEANED UP a8o a o 0 0 ob0 0 0 0 0 0 0 o eb / // // // // // // // // ///�/ �/ �� �/ �� �/ �/ // // // — MIN LOWERD
0 ob obo 00 �1 \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\
/ / / / / / / / / / / / / / / / / POOL = 271.00
IMMEDIATELY. / / / / / /
/ / / / / / / / / /
\ \ \ \ \ \ \
\
\ \ \ \ \
. I
0
\ � Lill.
EXISTING ,dC16\CJ�
i
Silt Fence
PLAN
RAILROAD BALLAST OR SURGE STONE
4' Min.
N CA/q
NOT TO SCALE
•�A�
EROSION CONTROL DETAIL NOTE: SEDIMENT SHALL BE f'
�. CLEARED OUT ONCE THE DEPTH
DURHAM COUNTY,NC
Q P OUTLET PROTECTION CONC. SIDE WALL ¢ SEAL
CONSTRUCTION ENTRANCE REACHES HALF THE HEIGHT OF
_ R ENGINEERING DEPARTMENT DATE ID THE PROTECTION +1FT = 040215 - -
�'rVi-�gsw 0209 CE- 1
. . . . . . . .
21-011
CONC. SILL
GIN
KR\S%%`'��
--+ RUNOFF WATER
�. 8' oc MAX WITH SEDIMENT
Top of Silt Fence Must FRONT VIEW OVERFLOW
Be at Least 1' Above
SItT F�NC� the Top of the Washed
Stone 1 1 Bury Wire Fence, a a a
FLOW OF WATER Filter Fabric 2 2 REPAIR N I H DAM
1 and Hardware
I I 1+ l 12 GAUGE 4'X4' OR 2"X4' WELDED WIRE Steel Fence Post Set Max. 2' Apart Cloth in Trench a
1 iVT —p1Z HOOFED ONTD PREFORMED CHANNELS ON 0 1 FILTERED WATER
51aRPG� MET,6- POSTS, � _ _ _ _ _ _ _ N INLETS AND OUTLETS
1 fI TASK ORDER C100809
ULTRAVICLET RESISTANT (BLACK) MIRIFI ,�M Cp
s FABRIC OR EQUIVALENT SFCL)RED TO WIRE ¢�.'�"' .G DAM INVENTORY# DURHA 105
w/ METAL cups OR WIRE AT a` of ��i` '�L EROSION CONTROL DETAIL a
CENTER. j` DURHAM COUNTY,NC SILT FENCE OUTLET
TO INCREASE STORAGE CAPACITY AND FEDERAL NID# NCO1666
ENGINEERING DEPARTMENT
PROLONG THE LIFE OF THE SILT FENCE, IT 0, ..........
IS GENERALLY ADVISABLE TO DIG A .►jtcA-i�� DATE
SEDIMENT
FENCE WHENEVER POSSIBLE. DURHAM COUNTY NC
SEDIMENT PIT IN FRONT OF THE SILT ° MAX. SEDIMENT STORAGE LEVEL REMOVE 02/09 SF-2 ZNO. 3 STONE '
° SEDIMENT WHEN THIS LEVEL IS REACHED OR M I RAF 11100 N OR EQ.
/ AS DIRECTED SURFACE OF CONCRETE
/ OUTLET SLAB NO. 57 STONE
ONSITE CONCRETE WASHOUT
° ✓ ° � 8 STRUCTURE WITH LINER_
- PERMIT SET
-_. TRENCH, COVER W/ SOIL TAMP BACKFILL.
° — - - SHEET DRAINAGE (ONLY)
_-__=_=_--_ 10'-01,MIN. GENERAL EROSION AND SEDIMENT CONTROL NOTES
NATURAL GRADE A
CARRY APPROX.12" OF FABRIC INTO TRENCH.
O O CD O 0 OR 6DTA GSE TYP.) 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.
N CARRY 6' OF WIRE INTO TRENCH. Z O 0 10 MIL
0 1:1 PLASTIC ( ) ES-2: THE LOCAL AUTHORITY HAVING JURISDICTION SHALL BE NOTIFIED OF THE PRE-CONSTRUCTION CONFERENCE. LOCAL AUTHORITIES HAVING JURISDICTION WILL
S METAL POSTS AT 10'O C. MAX.. b SIDE SLOPE LINING OR STAPLE
GTYP.
S
(TYP.) MAKE A CONTINUING REVIEW AND EFFECTIVENESS OF THE METHODS AND EFFECTIVENESS OF THE EROSION CONTROL PLAN.
o 0 0
NOT TO SCALE O 2: X x ES-3: ALL EROSION AND SEDIMENT CONTROL MEASURES SHALL BE PLACED PRIOR TO OR AS THE FIRST STEP IN CLEARING, GRADING, OR LAND DISTURBANCE.
J 0 O O O '��/i./i� O //././i.
} M NATIONAL INSTITUTES OF HEALTH
EROSION CONTROL DETAIL
Y 'a .• �.`
ENGINURHAMCOUNTY,NC DEPARTMENT TEMPORARY SILT FENCE DATE ID A ES-4: BEEN STABILIZED.EROSION CONTROL MEASURES WHICH SERVE THIS SITE SHALL REMAIN IN PLACE AND SHALL BE MAINTAINED UNTIL THE AREAS THEY SERVE HAVE 111 DURHAM NC �R DRIVE
►''.1;.1K�'
�O ��A RE\': 02 09 SF-1
984 287-4382
— CLEARLY MARKED SIGNAGE SECTION A-A
ES-5: ALL STREETS AND ROADWAYS SHALL BE MAINTAINED FREE OF MUD AND DIRT, AND CONTROL DUST AS NECESSARY.
co
N CONCRETE NOTING DEVICE(18"X24" MIN.)
o
N WASHOUT NOTES: MARK DATE DESCRIPTION
CN 1.ACTUAL LOCATION DETERMINED IN FIELD ES-6: A COPY OF THE APPROVED EROSION AND SEDIMENT CONTROL PLAN SHALL BE MAINTAINED ON THE SITE AT ALL TIMES.
N
2.THE CONCRETE WASHOUT STRUCTURES SHALL BE
8'MAX. MAINTAINED WHEN THE LIQUID AND/OR SOLID REACHES ES-7: PROVIDE ADDITIONAL EROSION CONTROL MEASURES NECESSARY TO PREVENT EROSION AND SEDIMENTATION AS DETERMINED BY THE LOCAL AUTHORITY
VARIABLE AS DIRECTED BY THE ENGINEER 75%OF THE STRUCTURES CAPACITY.
Q WARNING 51GN HAVING JURISDICTION.
02
O� TREE PROTECTION AREA PLAN 3.CONCRETE WASHOUT STRUCTURE NEEDS TO BE ES-8: ALL DISTURBED AREAS SHALL DRAIN TO APPROVED SEDIMENT CONTROL MEASURES AT ALL TIMES DURING LAND-DISTURBING ACTIVITIES AND DURING SITE
CLEARY MARKED WITH SIGNAGE NOTING DEVICE.
M MIN.10 GA. DO NOT ENTER DEVELOPMENT.
LINE WIRES MIN.12-1/2 GA.
INTERO WIRES
MEDIATE BELOW GRADE WASHOUT STRUCTURE
N
N GRADE NOT TO SCALE ES-9: DURING DE-WATERING OPERATIONS, WATER SHALL BE PUMPED INTO AN APPROVED FILTERING DEVICE.
O
U SWOYEN WIRE FABRIC - = —IIIII=IIIII-11 IIIII-IIIII-IIIII-IIIII-IIIII-IIIII=IIIII-IIIII-IIIII- -IIIII=IIIII=IIIII=IIIII-1�_II =IIIII-11' ES-10: INSPECT ALL EROSION CONTROL MEASURES DAILY AND AFTER EACH RUNOFF PRODUCING RAINFALL EVENT. ANY NECESSARY REPAIRS OR CLEANUP TO
- IIIII NIII
Q WARNING SIGN III — IIIII MAINTAIN THE EFFECTIVENESS OF THE EROSION CONTROL DEVICES SHALL BE MADE IMMEDIATELY.
U HIGH - .UV RESISTANT _ HIGH 10'-0"MIN.
, HIGH -TENSILE STRENGTH ORANGE,UV RESISTANT SANDBAGS TYP.)
O POLY BARRICADE FABRIC (TYPICAL) I HIGH - TENSILE STRENGTH III COHESIVE& r,B OR STAPLE
I POLY BARRICADE FABRIC (TYPICAL) LOW FILTRATION HIGH
Q IIIII = IIIII SOIL BERM ES-11: PRIOR TO ANY LAND DISTURBING ACTIVITIES THE CONTRACTOR SHALL DESIGNATE A RESPONSIBLE LAND DISTURBER (RLD)TO THE DEPARTMENT OF ENVIRONMENTAL
J M nl = III = 10 MIL COHESIVE&
AD 0 CDO 0 PLASTIC LINING LOW FILTRATION AND NATURAL RESOURCES (DENR) IN ACCORDANCE WITH THE NORTH CAROLINA SEDIMENTATION POLLUTION CONTROL ACT OF 1973.
DD 1:1 SIDE SLOPE SOIL BERM
z FRONT VIEW z 0 0 (TYP.) MAINTENANCE
C7 r
o M TREE PROTECTION AREA O 0
CD p P DO NOT ENTER 'v' /�/�/�/ / / // / / ///�/`/`�`/ ALL EROSION AND SEDIMENT CONTROL MEASURES SHALL BE CHECKED DAILY AND AFTER EACH RUN OFF PRODUCING RAINFALL. THE FOLLOWING ITEMS SHALL BE
..�. %%. PROJECT NO: 22-0363.001
_ o O O 00 2'-0" CHECKED IN PARTICULAR: SCALE: AS SHOWN
z WARNING SIGN DETAIL SECTION B-B
LU SIDE VIEW NOTES: 6 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 DESIGNED BY: DAK
Q WARNING SIGNS TO BE MADE OF DURABLE,WEATHERPROOF MATERIAL. B PERIODIC TOP DRESSING WITH ADDITIONAL STONE OR THE WASHING AND REWORKING OF EXISTING STONE AS CONDITIONS DEMAND AND REPAIR AND/OR
HI LETTERS TO BE 3' GH MINIMUM,CLEARLY LEGIBLE AND SPACED AS DETAILED. DRAWN BY: KHH
__I SIGNS SHALL BE PLACED AT 50'MAXIMUM INTERVALS. CLEANOUT OF ANY STRUCTURES USED TO TRAP SEDIMENT. ALL MATERIALS SPILLED, DROPPED, WASHED, OR TRACKED FROM VEHICLES ONTO ROADWAYS ON
>_ PLACE A SIGN AT EACH END OF LINEAR TREE PROTECTION AND 50'01Y CENTER THEREAFTER. SANDBAGS(TYP.) NOTES:
FOR TREE PROTECTION AREAS LESS THAN 200'IN PERIME TER,PROVIDE NO LESS THAN ONE SIGN PER PROTECTION AREA. OR STAPLES INTO STORM DRAINS MUST BE REMOVED IMMEDIATELY. THE USE OF WATER TRUCKS TO REMOVE MATERIAL DROPPED, WASHED, OR TRACKED ONTO ROADWAYS CHECKED BY: DJR
LU ATTACH SIGNS SECURELY TO FENCE POSTS AND FABRIC. 1.ACTUAL LOCATION DETERMINED IN FIELD WILL NOT BE PERMITTED UNDER ANY CIRCUMSTANCES
> M CIRCUMSTANCES.
TREE PROTECTION FENCE THROUGHOUT DURATION OF PROJECT. SHEET TITLE
ADDITIONAL A SIGNS MAY BED OF LINEAR
BASED ON ACTUAL FIELD CONDITIONS. CLEARLY MARKED SIGNAGE 2.THE CONCRETE WASHOUT STRUCTURES B. THE SILT FENCE BARRIER SHALL BE CHECKED FOR UNDERMINING OR DETERIORATION OF THE FABRIC. SEDIMENT SHALL BE REMOVED WHEN THE LEVEL OF
PLACE A SIGN AT EACH END OF LINEAR TREE PROTECTION AND 50'ON CENTER THEREAFTER. Ao• CONCRETE � NOTING DEVICE(18"X24" MIN.) SHALL BE MAINTAINED WHEN THE LIQUID
SEDIMENT DEPOSITION REACHES HALF WAY TO THE TOP OF THE BARRIER. ALL DAMAGES SHALL BE REPAIRED IMMEDIATELY.
WASHOUT AND/OR SOLID REACHES 75%OF THE C. SEEDED AREAS SHALL BE CHECKED TO ENSURE THAT A GOOD STAND IS MAINTAINED. AREAS SHALL BE FERTILIZED AND RESEEDED AS NEEDED.
area pars Pr boles on T STRUCTURES CAPACITY TO PROVIDE
O v dhibidoEntr 8 ADEQUATE HOLDING CAPACITY WITH D. ALL MULCHES AND SOIL COVERINGS SHOULD BE INSPECTED PERIODICALLY TO CHECK FOR EROSION. WHERE EROSION IS OBSERVED IN MULCHED AREAS, EROSION AND SEDIMENT
ProhibidoEutrar I MINIMUM 12 INCHES OF FREEBOARD. ADDITIONAL MULCH SHOULD BE APPLIED. NETS AND MATS SH OUDL BE INSPECTED AFTER RAINSTORMS FOR DISLOCATION OR FAILURE. IF WASHOUTS OR
CONTROL NOTES AND
3.CONCRETE WASHOUT STRUCTURE NEEDS BREAKAGE OCCUR RE-INSTALL NETTING OR MATTING AFTER REPAIRING DAMAGE TO SLOPE OR DITCH. INSPECTIONS SHOULD TAKE PLACE UP UNTIL GRASSES ARE
o PLAN FIRMLY ESTABLISHED
N TO BE CLEARY MARKED WITH SIGNAGE WARNING SIGN DETAIL NOTING DEVICE. E. CONCRETE WASHOUT FACILITIES SHOULD BE INSPECTED DAILY AND AFTER HEAVY RAINS TO CHECK FOR LEAKS. WHEN THE WASHOUT CONTAINER IS FILLER TO DETAILS
ABOVE GRADE WASHOUT STRUCTURE OVER 75% OF IT'S CAPACITY, THE WASHWATER SHOULD BE VACUUMED OFF OR ALLOWED TO EVAPORATE TO AVOID OVERFLOWS. THEN WHEN THE REMAINING
EROSION CONTROL DETAIL NOT TO SCALE CEMENTITIOUS SOLIDS HAVE HARDENED, THEY SHOULD BE REMOVED AND RECYCLED. DAMAGES TO THE CONTAINER SHOULD BE REPAIRED IMMEDIATELY. PRIOR
W ;''` DURHAM COUNTY,NC TREE PROTECTION DETAIL TO RAIN EVENTS, THE CONTAINER'S LIQUID LEVEL SHOULD BE LOWERED OR THE CONTAINER SHOULD BE COVERED TO AVOID AN OVERFLOW.
Q �e ENGINEERING DEPARTMENT DATE In
R�i(�u;,?Y
�►�.��' (12109 1 P-I
LC501
U
X SHEET 8 OF 8