20190992 Ver 4_Modification Request Attachment_20210423

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STATE OF NORTH CAROLINA
DEPARTMENT OF TRANSPORTATION
ROY COOPER J.ERIC BOYETTE
GOVERNOR SECRETARY
April 23,2021
U.S.Army Corps of Engineers
Raleigh Regulatory Field Office
3331 Heritage Trade Drive, Suite 105
Wake Forest,NC 27587
ATTN: Mr. Eric Alsmeyer,NCDOT Regulatory Coordinator
Subject: Request for Modification to the Regional General Permit Number 198200031,Section
401 Water Quality Certification, and Neuse Buffer Authorization for U-2719 —
Improve Existing 1-440 Beltline, from south of SR 1313 (Walnut Street) to north of
SR 1728(Wade Avenue). Debit WBS 35869.1.2
Reference: Regional General Permit Number 31 Verification (Action ID: SAW-2012-01414) dated
August 21, 2019 and modified on July 17, 2020
401 Water Quality Certification and Neuse Buffer Authorization (DWR Project No.
20190992)dated August 26,2019;Modification to the Neuse Buffer Authorization(DWR
Project No. 20190992 ver 2) dated May 12, 2020 and modified on July 15, 2020 (DWR
Project No.20190992 ver 3)
Dear Sir:
The North Carolina Department of Transportation(NCDOT)requests modification to the existing Section
404 Regional General Permit Number 31, Section 401 Water Quality Certification, and Riparian Buffer
Authorization for the widening and improving of I-440/US 1 from SR 1313 to SR 1728 (TIP Project U-
2719) in Wake County. This project is currently under construction.
This modification request is a result of the NCDOT left with no choice but to breach the dam of White Oak
Lake (Lake Cramer) located northeast of the Jones Franklin Interchange with I-440. The North Carolina
Department of Environmental Quality—Dam Safety issued a notice to the owners of the dam,including the
NCDOT, that the dam is deficient and has been categorized as high hazard. Based on feedback from
NCDEQ, the condition of the dam and spillway is such that there is no feasible repair and replacement of
the dam and spillway would likely be necessary. The NCDOT,as a policy,does not allow dams for private
lakes or ponds to be located within the highway right of way as it constitutes an unnecessary risk to NCDOT
facilities and presents an unacceptable cost to maintain.It should be noted that the City of Raleigh had plans
to reconstruct this dam and spillway outside of NCDOT right of way as part of their multi-phased project
to reduce flooding and improve water quality in the Simmons Branch watershed. However, the City
encountered obstacles and was unable to complete the project. An alternative to reconstruction of the dam
and spillway would be to breach the dam, thereby draining White Oak Lake.
Mailing Address: Location:
NC DEPARTMENT OF TRANSPORTATION Telephone:[phone] 1000 BIRCH RIDGE DRIVE
ENVIRONMENTAL ANALYSIS UNIT Customer Service: 1-877-368-4968 RALEIGH NC 27610
1598 MAIL SERVICE CENTER
RALEIGH NC 27699-1598 Website:www.ncdot.gov

Because the NCDOT project clips a corner of the dam due to the road widening it has fallen on NCDOT to
work with Dam Safety on breaching the dam. Breaching the dam and draining the lake is a requirement in
the short term for safety for all downstream properties. This modification is a result of additional impacts
due to breaching the dam and stabilizing the area.
The modification results in 2.69 acres(ac) of additional wetland impact,445 linear feet(lf) of additional
permanent stream impacts, a reduction of 28 lf of temporary stream impacts, and an increase of 25,984
square feet(sq ft)of riparian buffer impacts in Zone 1 and an increase of 11,666 sq ft in Zone 2. The total
project impacts for U-2719 include 2.73 ac of permanent wetland impacts,no temporary wetland impacts,
no hand clearing in wetlands,2,000 lf of permanent stream impacts, 660 lf of temporary stream impacts,
and 163,081 sq ft of buffer impacts(110,006 sq ft in Zone 1 and 53,075 sq ft in Zone 2).
Please see the enclosed revised permit drawings and updated impact summary sheets which reflect the
changes in impacts as well as the following updated tables and explanation.
Explanation of Permit Impact Site Modifications Being Requested
The USACE shared with NCDOT staff that the City of Raleigh had a jurisdictional determination(JD)on
their proposed project. NCDOT was able to obtain the wetland and stream files approved by the USACE
which is now incorporated into the NCDOT plan set and permit impact sheets. A few of the impact
changes detailed in this modification are due to the recently obtained JD and are noted below.
Site 6 (Sheet 14)—Site 6 has an increase of 0.04 ac of wetland impacts due to mechanized clearing. This
impact is a result of the additional rock stabilization needed along the roadway fill slope and access for
breaching the dam. The impact at Site 6 is now 0.01 ac of permanent fill and 0.05 ac of mechanized
clearing.
Site 7 (Sheet 14)—Site 7 has an increase in permanent stream impacts and buffer impacts due in part to
the new delineation as well as the extended impacts related to the dam breach. The increase in permanent
stream impacts is due to relocation and stabilization of the stream once the dam is breached. The new
stream impact for Site 7 is 298 lf of permanent stream impact from the dam breach to the inlet, 97 lf of
outlet protection, and 221f of temporary stream impact. This is an increase in permanent stream impact
by 3601f and a reduction of 28 lf of temporary impact for Site 7.
Buffer Site 7(Sheet 14)—Site 7 buffers have changed as they will now be impacted by the White Oak
Lake dam breach and access requirements. The total impact in Zone 1 is 14,399 sq ft and Zone 2 is 6,548
sq ft for Site 7. This is an increase in Zone 1 impact by 12,939 sq ft and 5,677 sq feet in Zone 2. Site 7
buffer impacts on the outlet side were reviewed and it was determined that those have been previously
cleared and are no longer illustrated as an impact.
Site 7A(Sheet 14/14B)—Site 7A has been added due to the need for extended outlet stabilization in
Simmons Branch and access. The wetland will have a small amount of fill(<0.01 ac) due to the rock
stabilization and the remaining portion(<0.01 ac) is shown as mechanized clearing. The wetland is
within the maintained utility easement and has already been cleared through ongoing utility maintenance.
Site 9 (Sheet 14/14A)—Site 9 was slightly different based on the old JD files in the original permit
application. This channel has been updated with the new JD files as described above which extends the
channel approximately 85 lf. This reach was also previously impacted due to bank stabilization; however,
with the changes in design at this location it was determined that the entire channel would require rock
armoring to stabilize the area. This is now shown as a permanent fill/stabilization impact on the summary
impact table. There is an 85 lf increase in impact due to the new JD file. The new impact is 147 lf which
is shown as permanent fill/stabilization impact.
2

Buffer Site 9(Sheet 14/14A)—Site 9 buffers have also changed as a result of the new JD file. Site 9
buffer impacts have increased in Zone 1 by 2,708 sq ft to 6,639 sq ft. Zone 2 buffers have increased by
1,392 to 2,738 sq ft.No additional buffer mitigation is proposed for the additional buffers
associated with the new JD file, as redesign and impacts are linked to the dam breach impacts
which were previously considered non-mitigable by NCDWR.
Site 10 and Site 11 (Sheet 14/14A)—Previous wetland Sites 10(WJ) and 11 (WI)have been removed due
to the most recent JD files discussed above. The area that was previously illustrated as wetland is part of
stream SU-I in the revised delineation. This results in a reduction in wetland impact by<0.01 ac of
excavation and<0.01 ac of mechanized clearing for Site 10 and<0.01 ac of excavation and<0.01 ac of
mechanized clearing for Site 11.
Buffer Site 10(Sheet 14/14A)—Previously there were no impacts illustrated with the buffers around
White Oak Lake due to the City of Raleigh project. The buffer impacts illustrated at Site 10 are associated
with construction and access for the dam breach at White Oak Lake. This results in 10,337 sq feet of
Zone 1 impacts and 4,597 sq ft of Zone 2 impacts.
Site 22 (Sheet 14/14A/29A)—Site 22 was added to illustrate the open water impacts associated with
breaching the dam of White Oak Lake. The open water impact associated with the breach is 5.10 ac.
This site also includes impacts to the fringe wetlands around the lake due to the drawdown of the lake.
This area has been hatched on the attached plan sheets and the 2.65 ac of wetland fringe has been noted at
the bottom of the summary impact table since it does not match any of the wetland impact types
illustrated on the summary table.
Revised Permit Impact Tables
The following tables illustrate the updates to the impacts that were previously provided in the electronic
PCN and Modification Request.
Revised U-2719 Jurisdictional Resources Impacts Table
Riparian Non- Stream (If)
Riparian Riparian
Impact Wetland Wetland Isolated Ponds Buffer
Temp./ Wetlands
Type perm. Temp./ (ac) (ac) Perm. Temp. (sq.ft.)
(ac)
Perm. Zone 1/2
(ac)
Neuse River
Basin 0.0/ 0.0 0.0 6.35 2 000 660 110,006/
,(HUC 2.73 53,075
03020201)
Bolded impact amounts represent a change from the 404 (SAW-2012-01414) issued on August 21, 2019
and modified July 16, 2020, 401 WQC (20190992) issued August 26, 2019 and modified July 15, 2020,
and Riparian Buffer Authorization issued August 26,2019 and modified May 12,2020 and July 15,2020.
U-2719 Wetland Impacts(Revised)
The total permanent wetland impact for U-2719 increased from 0.04 ac in the most recent 404/401
Authorizations to 2.73 ac due to this modification. Most of the increase is due to impacts to the fringe
wetlands around White Oak Lake. The other changes are necessary due to construction access, a result of
the additional stabilization required due to the dam breach, or a result of the new delineation file. See the
revised stream impact table below.
3

Revised U-2719 Wetland Impacts Table
Permit NRTR Wetland Permanent Temporary
Drawing Label Impact Type Type Impacts(ac.) Impacts
Site Number (ac.)
2 WK Mechanized Clearing Riparian 0.01 -
6 WF Fill Riparian 0.01 -
6 WF Mechanized Riparian 0.05 -
Clearing
7A WH Fill Riparian <0.01 -
7A WH Mechanized Riparian <0.01 -
Clearing
22 WZAA Lake Drawdown Riparian 2.65 -
Total Impacts 2.73 -
Bolded impact amounts represent a change from the 404 (SAW-2012-01414) issued on August 21, 2019
and modified July 16, 2020, 401 WQC (20190992) issued August 26, 2019 and modified July 15, 2020,
and Riparian Buffer Authorization issued August 26,2019 and modified May 12,2020 and July 15,2020.
U-2719 Open Water(Ponds)Impacts (Revised)
The amount of open water impacts increased by 5.10 ac due to the draining of White Oak Lake. The new
open water impact is 6.35 ac.
Revised U-2719 Open Water Impacts Table
Permit Drawing Site Permanent Surface
Number NRTR Label Impact Type Water Impacts
(Ponds)(ac)
5 OWD Draining/Fill Pond 1.25
22 OWC Dam Breach 5.10
Total Impacts 6.35
Bolded impact amounts represent a change from the 404 (SAW-2012-01414) issued on August 21, 2019
and modified July 16, 2020, 401 WQC (20190992) issued August 26, 2019 and modified July 15, 2020,
and Riparian Buffer Authorization issued August 26,2019 and modified May 12,2020 and July 15,2020.
U-2719 Stream Impacts (Revised)
The total permanent stream impact for U-2719 increased from 1,555 if in the most recent 404/401
Authorizations to 2,000 If. This modification results in 445 if of additional permanent stream impact from
stabilization required and a reduction of 28 if of temporary stream impact due to changes at Permit Sites 7
and 9. See the revised stream impact table below.
Revised U-2719 Stream Impacts Table
Perennial(P) Average Existing Existing
Permit Stream Channel Channel
or Type of Stream Impact
Site Type of Impact Impacts Impacts
Name Intermittent Jurisdiction Width Type
No. (I) (feet) Permanent Temporary
(ft) (ft)
1 SAK I Both Rip Rap at 18" 3 P/T 7 10
Outlet
3 SX P Both Culvert Clean Out 13 P/T — 9 41
Bank Stabilization 93 97
4 SW P Both Rip Rap in Stream 10 T 0 112
7 ST P Both Outlet Stabilization 13 P/T 97 22
4

Perennial(P) Average Existing Existing
Permit Channel Channel
Stream or Type of Stream Impact
Site Type of Impact Impacts Impacts
No. Name Intermittent Jurisdiction Width Type Permanent Temporary
(I) (feet) (ft) (ft)
7 ST P Both Inlet Stabilization 13 P 298 0
8 SV I Both Bank Stabilization 4 P 244 0
9 SU I Both Fill/Stabilization 4 P 147 0
Channel
12 SS P Both Improvement/Bank 5 P/T 34 65
Stabilization
13 SR P Both Fill/Outlet 18 P/T 117 50
Stabilization
Roadway Fill/Outlet 388 40
Stabilization
14 SO P Both Bank Stabilization 6 P/T 85 70
Utility-Bank
Stabilization 35 0
15 SP P Both 30"CSP 8 P 56 10
16 SN I Both 36"WCSPnd 36" 13 P/T 70 24
17 SC P Both 8' x 8' Culvert 8 P/T 97 40
Extension/Stab.
18 SAN P Both Lateral Ditch 8 P/T 31 39
i
I
19 SE I Both 48"RCP Extension 4 P/T 29 22
14' x 7' RCBC P 98 0
20 SW P Both 10
Bank Stabilization P/T 65 18
Total Jurisdictional Ditch Impact in Square Feet 0
Total Permanent Stream Impacts 2,000
Total Temporary Stream Impacts 660
Total Stream and Ditch Impacts 2,660 _
Bolded impact amounts represent a change from the 404 (SAW-2012-01414) issued on August 21, 2019
and modified July 16, 2020, 401 WQC (20190992) issued August 26, 2019 and modified July 15, 2020,
and Riparian Buffer Authorization issued August 26,2019 and modified May 12,2020 and July 15,2020.
U-2719 Riparian Buffer Impacts(Revised)
The riparian buffer impacts for U-2719 increased overall from 125,431 sq ft to 163,081 sq ft. There is a
35,473 sq ft increase in allowable buffer impacts from 71,187 sq ft documented in the most recent buffer
modification to 106,660 sq ft. There is an increase in mitigable buffers resulting from changes related to
the new jurisdictional file provided by the City which changed SU-I. The most recent mitigable buffer
impact for U-2719 was 54,244 sq ft. The new mitigable buffer impact for the project is 56,421 sq ft, an
increase of 2,177 sq ft. See the revised riparian buffer impact table below.
5

Revised U-2719 Riparian Buffer Impacts Table
Site Per or Stream Buffer mitigation Zone 1 impact Zone 2 impact
No. Impact Type Temp name required? (ft2) (ft2)
1 Rip Rap at 18" Outlet, P SAK No 1,272 0
allowable
3 Culvert Clean Out, allowable P SX No 1,753 212
3 Bank Stabilization, P SX No 3,612 1,923
allowable
4 Rip Rap in Stream, P SW No 5,604 4,248
allowable
4 Rip Rap in Stream, P SW Yes 3,711 0
allowable w/mitigation
White Oak Lake dam
7 P ST No 14,399 6,548
breach,allowable
9 Channel Stabilization, P SU Yes 3,391 1,346
allowable w/mitigation
9 Channel Stabilization, P SU No 2,708 1,392
allowable
10 White Oak Lake dam P OWC No 10,337 4,597
breach,allowable
12 Channel Imp./Bank Stab., P SS No 6,199 3,968
allowable
Roadway Fill/Outlet
13 Stabilization, allowable w/ P SR Yes 7,989 6,169
mitigation
14 Roadway Fill, allowable P SO No 6,846 1,384
14 Roadway Fill, allowable w/ P SO Yes 14,827 7,423
mitigation
14 Utility, allowable P SO No 4,075 1,396
15 30" CSP, allowable P SP No 3,767 3,730
16 36" WSP&36" CSP, P SN No 3,379 367
allowable
16 36" WSP&36" CSP, P SN Yes 775 206
allowable w/mitigation
17 8'x8'Culvert P SC No 3,660 1,592
Extension/Stab., allowable
18 2'Base Lateral Ditch, P SAN Yes 3,035 2,070
allowable w/mitigation
19 48" RCP Extension, P SE No 2,179 926
allowable
20 14'x 7'RCBC, allowable P SW No 5,515 3,172
21 I Bank Stabilization, P SC Yes 433 406
allowable w/mitigation
Total Allowable Buffer Impact 72,597 34,063
Total Mitigable Buffer Impact 37,409 19,012
TOTAL COMBINED BUFFER IMPACT 110,006 53,075
Bolded impact amounts represent a change from the 404 (SAW-2012-01414) issued on August 21, 2019
and modified July 16, 2020, 401 WQC (20190992) issued August 26, 2019 and modified July 15, 2020,
and Riparian Buffer Authorization issued August 26,2019 and modified May 12,2020 and July 15,2020.
6

Compensatory Mitigation
NCDOT evaluated options to mitigate for loses due to the dam breach on White Oak Lake but there were
a number of factors that led to the determination that onsite mitigation was not feasible. The following
bullet list includes several of the reasons:
• NCDOT does not own the property and will have no access to the site once the noise wall is
installed.Besides the property is not for sale nor would it be affordable if it were available for
purchase.The TDE settlement price alone was around$95,000.
• The Attorney General approved letters to property owners which presents the current design and
the promise that the Dam Safety notice requiring breaching of the existing dam will not prevent
White Oak Lake,Inc.,the City of Raleigh, or other entities from rebuilding a new dam outside of
the NCDOT right of way at any time in the future. Onsite mitigation would directly go against
that letter.
• Right of way negotiations or design and construction beyond what is currently designed would be
timely and NCDOT must meet the Dam Safety deadline requirement of July 2021.
Please see attached revised N.C. Division of Mitigation Services acceptance letter to cover the
additional impacts of this modification. During recent discussions the USACE, it was determined
that mitigation required for the additional stream impacts but the additional wetland impacts would
require mitigation at a 1: 1 ratio. The NCDWR also stated that this modification would not require
additional mitigation for the buffer impacts associated with the dam breach. The following table
illustrates the revised compensatory mitigation needs.
Revised U-2719 Prosed CompeiNMi ry Mitigaatiteon.Table Riparian Buffer Riparian
-Riparian Riparian Stream Calculation (sq. ft.) Buffer
Mitigation Type Wetland Wetlands
(ac) Wetland (ac) (1 Total
Zone 1 Zone 2
(ac) , (sq.ft.)
Neuse River 35,753 x 18,491 x
Basin 2.73 0.0 0.0 841 3.0= 1.5 = 134,996
(HUC 03020201) 107,259 27,757
Bolded impact amounts represent a change from the 404 (SAW-2012-01414) issued on August 21, 2019
and modified July 16, 2020, 401 WQC (20190992) issued August 26, 2019 and modified July 15, 2020,
and Riparian Buffer Authorization issued August 26,2019 and modified May 12,2020 and July 15,2020.
Regulatory Approvals
All other proposed impacts remain the same as in our PCN submitted on July 23,2019 unless approved via
the previous modification issued by the NC Division of Water Resources. The Department requests that
these revised impacts and the remainder of the previously permitted impacts be issued under the recently
approved RGP 31 (effective May 26,2020).
Thank you for your assistance with this project. If you have any questions or need additional information,
please contact Jason Dilday at either jldildayAncdot.gov or(919) 707-6111.
Sincerely,
,-DocuSigned by:
1.14€4 C. R:,ve4.1 k III
"-AAAD1248B309416...
for Philip S. Harris III, P.E., C.P.M.
Environmental Analysis Unit Head
7

_.,mot STATE w
ROY COOPER I
Governor u "
DIONNE DELLI-GATTI „ ^Aer a n*
Secretary 4,` ^°`"_-`
TIM BAUMGARTNER NORTH CAROLINA
Director Environmental Quality
April 15, 2021
Mr. Philip S. Harris, P.E., CPM
Environmental Analysis Unit
North Carolina Department of Transportation
1598 Mail Service Center
Raleigh,North Carolina 27699-1598
Dear Mr. Harris:
Subject: DMS Mitigation Acceptance Letter for Additional Impacts:
U-2719,Raleigh—I-440/US 1 Widening from South of SR 1313 (Walnut
Street)to North of SR 1728 (Wade Avenue)in Raleigh,Wake County
References: USACE 404 GP 31 issued August 21,2019 and modification issued July 16,
2020 (USACE Action ID 2012-01414)
NCDWR 401 Water Quality Certification issued August 26,2019 and
modification issued July 15, 2020 (ID 2019-0992)
The purpose of this letter is to notify you that the Division of Mitigation Services(DMS)will
provide the wetland mitigation for the subject project. Based on the information supplied by you on April
14,2021,the impacts are located in CU 03020201 of the Neuse River basin in the Central Piedmont(CP)
Eco-Region, and are as follows:
Table 1 —Additional Impacts (feet/acres)
Neuse Stream Wetlands Buffer(Sq.Ft.)
03020201 Non- Coastal
CP Cold Cool Warm Riparian Riparian Marsh Zone 1 Zone 2
Impacts 0.000 0.000 0.000 2.730 0.000 0.000 0.000 0.000
(feet/acres)
*NOTE: Some of the impacts may be proposed to be mitigated at a 1:1 mitigation ratio. See permit application for details.
This additional impact and associated mitigation needs were not projected by the NCDOT in the
2021 impact data. DMS is currently providing stream and buffer mitigation for the impacts associated
with this project located in cataloging unit 03020201 of the Neuse River basin as required by the 404 and
401 permits issued in 2019 and 2020,as shown in the below table(in mitigation credits)
____ North Carolina Department of Environmental Quality Division of Mitigation Services
w/g 217 West Jones Street 1652 Mail Service Center Raleigh,North Carolina 27699-1652
NORTH CAM INA
newbnem of EnNmn,n4i puaory 919.707.8976

Mr. Harris
TIP U-2719
April 15,2021
Page Two
Table 2—Current Permitted Impacts and Associated Mitigation Requirements provided by DMS
(based on issued permits) and Revised Anticipated Impacts (based on mitigation request)
Total Permitted Mitigation Provided by DMS Additional Impact Revised Total
Impact Type Impacts per Issued Permits(Credits) (for approval) Impacts*
(feet/acre/sq ft)
Stream(warm) 841.000 1,682.000 0.000 841.000
Riparian 0.000 0.000 2.730 2.730
Buffer—Zone 1 35,753.000 107,259.000 0.000 35.753.000
Buffer—Zone 2 18,491.000 27,737.000 0.000 18,491.000
*Some of the additional impacts may be proposed to be mitigated at a 1:1 mitigation ratio.See permit application for details.
DMS will provide the amount of mitigation as determined by the regulatory agencies.
This mitigation acceptance letter replaces the mitigation acceptance letter issued on July 3,
2019. DMS commits to implementing sufficient wetland mitigation credits to offset the impacts
associated with this project as determined by the regulatory agencies using the delivery timeline listed in
Section F.3.c.iii of the In-Lieu Fee Instrument dated July 28,2010. If the above referenced impact
amounts are revised,then this mitigation acceptance letter will no longer be valid and a new mitigation
acceptance letter will be required from DMS.
If you have any questions or need additional information,please contact Ms. Beth Harmon at
919-707-8420.
Sincerely,
c'grja.?5, 7-Varte-ii.
James B. Stanfill
DMS Asset Management Supervisor
cc: Mr.Monte Matthews,USACE—Raleigh Regulatory Field Office
Ms. Amy Chapman,Division of Water Resources,Wetlands/401 Unit
File: U-2719 Additional 2
--":1:, North
217W Caroest Jones[ina DepartmentStreet11652 ofMail EnvironmentaServiceCenterl QualityE
Division of Mitigation Services
Raleigh,North Carolina 27699-1652
NOR TR CAROLINA
°•p"°"°"1 m e"w'°"'"e"ai o"'im' 919.707.8976

Submitted 4/23/2021
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VGRAPHIC SCALES I DESIGN DATA PROJECT LENGTH Prepared for tee Office of: HYDRAULICS ENGINEER
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4/23/2021
LEGEND LANE PROJECT REFERENCE NO. SHEET NO.
U-2719 14
RNV SHEET NO.
ROADWAY DESIGN HYDRAULICS
DENOTES TEMPORARY ENGINEER ENGINEER
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Submitted 4/ 3/2021
PROJECT REFERENCE NO. SHEET NO.
LEGEND LANE
U-2719 14
R SHEET NO.
ROADWAY DESIGN HYDRAULICS
DENOTES TEMPORARY ENGINEER ENGINEER
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DENOTE$MECHANIZED n zs Iz.s o zs so J 555 Fayetteville Sl,Suite 900 Raleigh,N.C.27601
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DETAIL BJ GRAPHIC SCALE U-2719 14A
RAP SHEET NO.
CHANNEL BANK STABILIZATION ROADWAY DESIGN HYDRAULICS
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/�� DENOTES TEMPORARY J` 555Fay.E.L.S. License
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IMPACTS IN SURFACE WATER FROM 284+24 -LI-LT STA. TO STA. 285+84 -LI-LT
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Submitted 4/2 3/2 0 21 .s0 US J PROJECT REFERENCE NO. SHEET NO.
Elin
GRAPHIC SCALE U-2719 14B
RAN SHEET NO.
DETAILB I ROADWAY DESIGN HYDRAULICS
LEGEND DETAIL BB ENGINEER ENGINEER
BANK STABILIZATION CULVERT OUTLET STABILIZATION
(Not to Scale)
(Not to Scale) Natural Bed
Elevation
NQtstra- �e —— atural Natural Natural
arounu Mvk oround
4'4 ?'J7 1`S Ground Ground A
/ /(j DENOTES IMPACTS IN N�egHt° tie M �erT`� �\o
/J SURFACE WATER ,e0 2' w
Geotextile DOCUMENT NOT CONSIDERED FINAL
fA on banks only Geotextile Q UNLESS ALL SIGNATURES COMPLETED
DENOTES TEMPORARY CHANNEL BED on banks only Channel Bed
$ (Variable)
IMPACTS IN SURFACE WATER Length= 35 Ft. (Variable
) Fn HDR Engineering,Inc.of the Carolinas
555 Fayetteville St,Suite 900 Raleigh,N.C.27601
Type of Liner= CL II Rip-Rap - Keyed-In N.C.B.E.L.S. License Number:F-0116
//� DENOTES FILL IN - -
Est.=Class IRip-Rap STA. 284+70 L1 RT
WETLAND LAN E
FROM STA. 284+90 TO STA. 287+27 -Ll- RT
. . .: : DENOTES MECHANIZED
CLEARING
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o a N at
SEE DETAILS, SHEET 2D-3 V �I��` �,
d . TO 288+00 -L1 RT
o `l'„ el IIIGS �v-' BANK STABILIZATION \ or
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' DETAIL BB
5'
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M EST. 75 TONS
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S ' -,
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2
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s, PERMIT DRAWING
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a 0 ,_

Submitted 4/23/2021
PROJECT REFERENCE NO SHEET NO
LANE .
LEGEND U-2719 29A
RNI SHEET NO.
ROADWAY DESIGN HYDRAULICS
ENGINEER ENGINEER
DENOTES IMPACTS IN 1—/1 HDR Engineering,Inc.Df the Carolinas
/�/�/ SURFACE WATER J 555 Fayefteville Sl,Suile 900 Raleigh,N.C.27601
555 Fay E.L.S. License Number:F-0116
DENOTES IMPACTS DUE TO tl
LAKE DRAWDOWN
\\
s
�o
/ DOCUMENT NOT CONSIDERED FINAL
UNLESS ALL SIGNATURES COMPLETED
Oe
Gradient,PLLC
aFeA''' 127 W Chatham St Cary,NC 27511
O6� .RATE N.CB.E.LS. License Number:P-1875
25 12.5 C 50
GRAPHIC
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s)

Submitted 4/23/2021
PROJECT REFERENCE NO. SHEET NO
LANE .
LEGEND U-2719 29A RNS SHEET NO.ROADWAY DESIGN HYDRAULICS
ENGINEER ENGINEER
DENOTES IMPACTS IN �/� HDR Engineering,Inc.of the Carolinas
/�/�/ SURFACE WATER J 555FayeftevilleSl,Suile900 Raleigh,N.C.27601
N.C.B.EL.S. License Number:F-0116
DENOTES IMPACTS DUE TO tl
LAKE DRAWDOWN
s
�o
/ DOCUMENT NOT CONSIDERED FINAL
UNLESS ALL SIGNATURES COMPLETED
Oe
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_RAOICPl7 127 W Chatham St Cary,NC 27511
06� * .,_a._.,.. N.C.B.E.L.S. License Number:P-1875
� \\\// / \ 25 12.5 0 25 50
GRAPHIC
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SEE SHEET NO.71 FOR -Y15A- PROFILE
as)

Submitted 4/23/2021
WETLAND AND SURACE WATER IMPACTS SUMMARY
WETLAND IMPACTS SURFACE WATER IMPACTS
Hand Existing Existing
Permanent Temp. Excavation Mechanized Clearing Permanent Temp. Channel Channel Natural
Site Station Structure Fill In Fill In in Clearing in SW SW Impacts Impacts Stream
No. (From/To) Size / Type Wetlands Wetlands Wetlands in Wetlands Wetlands impacts impacts Permanent Temp. Design
(ac) (ac) (ac) (ac) (ac) (ac) (ac) (ft) (ft) (ft)
1 SAK - 230+75 -L1A- Lt Rip Rap at 18" Outlet < 0.01 < 0.01 7 10
2 WK - 244+95 -L1A- Lt Lateral Ditch 0.01
3 SX - 245+72 -L1A- Culvert Clean Out < 0.01 0.03 9 41
3 SX - 245+72 -L1A- Bank Stabilization 0.03 0.09 93 97
4 SW - 41+85 -Y10- Rt Rip Rap in Stream 0.03 112
5 OWD - 21+50 -Y1 ORPA- Draining/Filling Pond 1.25
6 WF - 282+90 -L1- Lt Roadway Fill 0.01 0.05
7 ST - 284+75 -L1- Rt Outlet Stabilization 0.04 < 0.01 97 22
7 ST- 584+75 -L1- Lt Inlet Stablization 0.08 298
7A WH-284+75 -L1- RT Outlet Stabilization < 0.01 < 0.01
8 ***SV - 286+00 -L1- Rt Bank Stabilization 0.02 244
9 SU - 284+50 -L1- Lt Fill/Stabilization 0.01 147
12 SS - 17+50 -Y25RB- Lt Channel Imp./Bank Stab. 0.01 0.01 34 65
13 SR -16+20 -Y25RC- Rt Roadway Fill/Outlet Stab. 0.04 0.01 117 50
14 **SO - 15+79 -Y25RD- Roadway Fill/Outlet Stab. 0.05 < 0.01 388 40
14 to 364+68 -L2RT- Rt Bank Stabilization 0.01 < 0.01 85 70
14 Utilities Bank Stabilization < 0.01 35
15 SP - 11+90 -Y29E- 30" CSP < 0.01 < 0.01 56 10
16 SN - 365+75 -L3- Rt 36" WSP & 36" CSP 0.01 < 0.01 70 24
17 SC - 433+33 -L3- 8' x 8' Culvert Extension/Stab. 0.04 < 0.01 97 40
18 SAN - 433+00 -L3- Rt Lateral Ditch 0.01 < 0.01 31 39
19 SE - 466+00 -L3- 48" RCP Extension < 0.01 < 0.01 29 22
SHEET TOTALS*: 0.01 0.07 1.62 0.21 1837 642 0
*Rounded totals are sum of actual impacts
NOTES:
**Stream SO is being daylighted for approx. 825 LF that was previously being piped through a 66" RCP. NC DEPARTMENT OF TRANSPORTATION
***Streams SV banks are being stabilized due to existing stream erosion along the banks. DIVISION OF HIGHWAYS
Site 10 and 11 removed due to revised delineation. 04-02-2021
Wake County
U-2719
35869.3.1
Revised 2018 Feb SHEET OF

Submitted 4/23/2021
WETLAND AND SURACE WATER IMPACTS SUMMARY
WETLAND IMPACTS SURFACE WATER IMPACTS
Hand Existing Existing
Permanent Temp. Excavation Mechanized Clearing Permanent Temp. Channel Channel Natural
Site Station Structure Fill In Fill In in Clearing in SW SW Impacts Impacts Stream
No. (From/To) Size / Type Wetlands Wetlands Wetlands in Wetlands Wetlands impacts impacts Permanent Temp. Design
(ac) (ac) (ac) (ac) (ac) (ac) (ac) (ft) (ft) (ft)
20 SW - 18+75 -Y9- 14x7 RCBC 0.02 98
20 SW - 18+75 -Y9- Bank Stabilization 0.02 < 0.01 65 18
22 OWC- 280+00 -284+00 -L1- RT Pond Dam Breach 5.10
TOTAL SHEET 1 0.01 0.07 1.62 0.21 1837 642
PROJECT TOTALS*: 0.01 0.07 6.76 0.22 2000.00 660.00
*Rounded totals are sum of actual impacts
NOTES:
Site 22 wetland WZAA along OWC are shown as impacted due to lake drawdown. Impact area is 2.65 ac. NC DEPARTMENT OF TRANSPORTATION
DIVISION OF HIGHWAYS
4-02-2021
Wake County
U-2719
35869.3.1
Revised 2018 Feb SHEET OF

Submitted 4/23/2021
PROJECT REFERENCE No �RR
61
M,/ See Sheet /A 9 For Sheet Symbology S°���� OF ®�°�� C A R®L I N A STATE STATEPR—2 71 A No. NRe s
d TRPROlN0.` DIVISION OF HIGHWAYS �o�. P 7
A.PROl.NO. FSCRIPTION
qo END PROJECT 35869.3.1 IMSNHS-04400TOL PE,ROW,UTILITIES
I —35868.3.4 STBG-0054L03Q) & CONSTR.
• WADE AVE
* WAKE COUNTY
C H
aoq
NSTON -------
I� 40 Bn
alp ja� MEMIPI at
N 4 LOCATION:I-440 /US 1 FROM SOUTH OF SR 1313 (WALNUT STREET) 'R� M o�1& 4
® TO NORTH OF SR 1728 (WADE AVENUE) ��=�`�■��A_�� r'
. . TYPE OF WORK: DESIGN-BUILD AS SPECIFIED IN THE SCOPE OF WORK *tar
BEGIN PROJECT CONTAINED IN THE REQUEST FOR PROPOSALS W
VVICINITY MAP �S.
W (NOT TO SCALE) O�
op
BUFFER IMPACTS �� SITE 19 ` 'lie �0Agi
�a �-r
PERMITMODIFICATION
/b.'"
M , r,T 21111 OO'Z1Z 021 % �F,
40 /� SITE 18 b
BEGIN TIP PROJECT U-2719 ,- SITE 17
EftrI BEGIN CONSTRUCTION SITE 21
—L— STA. 124+52.06 ti11Js , �:,
°oRo��H sT o r ,� END TIP PROD. U-2719
'� END CONSTRUCTION
�a
�� ti� \N.„c,, —L— STA. 460+21.69
9� •
' ° op.,,„.„,,,
'�G,• 5
N s� SITE 14 /' /
SITE 10 SITE 7
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w SITE 1 ;� ilita, .? 4�
4 5 6 ���
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TO APEX _=L- . \�/ 00, o1a9
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ii t SITE 16 s
ti 7 ' �� ems:; -Ne�( ��__� SITE 15
r i ice` ill
mac_. Q ��l:,&4 I �_ �Rf Y
v, a • h 111 's i� � 13 0 16 STfRHse
-Y15-
E , n m �7^ \ (ATHENS DR.) MELBRDO.•NE ��.0.)
mi. \�� ) SITE 13
z Q ' O SITE 20 DOCUMENT NOT CONSIDERED FINAL
��' SITE 4 SITE 3 SITE 6 SITE 8 UNLESS ALL SIGNATURES COMPLETED
w 7
0 �
z . ,, AO\ -,, • 55DR En9�llle er 5 I No f be oohr s
V ,, BUFFER DRAWING ` NCBELS LicenseNumber:F-0116
o SHEET _ OF _ LANE
3 a Q Q V GRAPHIC SCALES I DESIGN DATA PROJECT LENGTH Prepared for t Office of: HYDRAULICS ENGINEER
-- cl
°' ADT 2018 = 144,810 LENGTH ROADWAY TIP PROJECT U-2719 /U-4437 = 6.087 MILES DIVISION OF HIGHWAYS
c o 0 50 25 0 50 100 1000 Birch Ridge Dr.,Raleigh NC,27610 ®L�PppI ' J " ADT 2040 = 183,700 ri---)1
���
1 K = 10 % LENGTH STRUCTURES TIP PROJECT U-2719 /U-4437 = 0.162 MILES 2018 STANDARD SPECIFICATIONS ®o
PLANS D = 55 % TOTAL LENGTH TIP PROJECT U-2719 /U-4437 = 6.249 MILES PE I.
'F SIGNATURE. u® �e
a 50 25 0 50 100 T = 9 % * RIGHT OF WAY DATE: PAUL MEEHAN, PEZ
YXOJECI'ENGINEER
`i I i i V = 70 MPH OCTOBER 2,2018 ROADWAY DESIGN
z Y PSI PROFILE (HORIZONTAL) * TTST = 5% DUAL = 4% ENGINEER
a ERSKINE BROOKS, PE ���p®� 8�����®���
> o O 10 5 0 10 20 FUNC CLASS = LETTING DATE: PROJECT DESIGN ENGINEER
`'i"i INTERSTATE DAVID HERING, PE OCTOBER 2,2018
,:1 PROFILE (VERTICAL) I STATEWIDE TIER NCDOT CONTACT: DESIGN-BUILD UNIT - PROJECT ENGINEER P.E.
of l\ /\ /\ SIGNATURE: /\

Submitted 4/23/2021 _
LEGEND LANE PROJECT REFERENCE NO. SHEET NO.
U-2719 14
RNV SHEET NO.
wii♦i0•ii♦i♦i MITIGABLE IMPACTS ZONE 1 ROADWAY DESIGN HYDRAULICS
♦'♦•�•�••�•�• ENGINEER ENGINEER
oo. ♦1 HDR Engineering,Inc.of the Carolinas
j MITIGABLE IMPACTS ZONE 2 1 J 555 Fayetteville St,Suite 900 Raleigh,N.C.27601
a ♦` N.C.B.E.L.S. License Number:F-0116
c \\\\\\ ALLOWABLE IMPACTS ZONE 2 r
9 op FN Z F♦••`����v ALLOWABLE IMPACTS ZONE 1
/ - - .
SITE 7 EXISTING TRANSPORTATION
^^y FACILITY �/\O11
G- `" ww " 0,- • ---• / NWry DOCUMENT NOT CONSIDERED FINAL
SN /�_ UNLESS ALL SIGNATURES COMPLETED
�•1•�•�s, FkS Q 25 0 15 50
N`Y s Gradient,PL F i l l l\I
N V I N • . 1•♦♦♦♦000♦♦♦♦♦♦•f0 A / WCc
G` "`` •♦O•.00•0♦••• S \ • / 127 W.Chatham SfRCPi 27511
.( CONSTRUCT PERMANENT 1'WIDE BASE 4ITQ-1 �•�'•i♦•♦O♦O•♦•Oa♦•♦•
. R/ ORAGICPl7 �Ir�
PFOR CLEAN WATER DIVERSION PRIOR • '''*:♦:4:t , NC.B.E.LS. License Number:P-1875
1
M COMMENCEMENT OF CONSTRUCTION O �•l �.•••e❖.❖.•., SITE 9
PERMANENT DAM BREACH CHANNEL; M ♦�O.O•♦+®••O••
SEE DETAIL 2D 7B •IV EP II%`!♦♦�•�e�♦�♦�•♦` \ -Y/ - POT Ste.100+00.0
REMOVE DUSTING PIPE$ O♦�♦��♦� •♦�.�.�.�♦ p
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Submitted 4/23/2021
RIPARIAN BUFFER IMPACTS SUMMARY
IMPACTS BUFFER
TYPE ALLOWABLE MITIGABLE REPLACEMENT
Site Station Structure ROAD PARALLEL
No. (From/To) Size / Type BRIDGE ZONE 1 ZONE 2 TOTAL ZONE 1 ZONE 2 TOTAL ZONE 1 ZONE 2
CROSSING IMPACT (ft2) (ft2) (ft2) (ft2) (ft2) (ft2) (ft2) (ft2)
1 SAK - 230+75 -L1A- Lt Rip Rap at 18" Outlet X 1272 1272
3 SX - 245+72 -L1A- Culvert Clean Out X 1753 212 1965
Bank Stabilization X 3612 1923 5535
4 SW - 41+85 -Y10- Rt Rip Rap in Stream X 5604 4248 9852 3711 3711
6 WF X
7 ST - 284+75 -L1- Lt Inlet Stabilization X 14399 6548 20947
8** SV - 286+00 -L1- Rt
9 SU - 284+50 -L1- Lt Fill/ Stabilization X 6639 2738 9377
10 OWC- 280+00 -284+00 -L1- Lt Pond Dam Breach X 10337 4597 14934
12 SS - 17+50 -Y25RB- Lt Channel Imp./Bank Stab. X 6199 3968 10167
13 SR -16+20 -Y25RC- Rt Roadway Fill/Outlet Stabilization X 7989 6169 14158
14 SO - 15+79 -Y25RD- Roadway Fill X X 6846 1384 8230 14827 7423 22250
SO - 360+64 -L2RT- 8" SS 4075 1396 5471
15 SP - 11+90 -Y29E- 30" CSP X 3767 3730 7497
16 SN - 365+75 -L3- Rt 36" WSP & 36" CSP X 3379 367 3746 775 206 981
17 SC - 433+33 -L3- 8' x 8' Culvert Extension/Stab. X 3660 1592 5252
18 SAN - 433+00 -L3- Rt 2' Base Lateral Ditch X 3035 2070 5105
19 SE - 466+00 -L3- 48" RCP Extension X 2179 926 3105
20 SW - 18+75 -Y9- 14' x 7' RCBC X 5515 3172 8687
21 SC - 38+70 -Y35RA- Rt Bank Stabilization X 433 406 839
TOTALS*: 72597 34063 106660 37409 19012 56421 0 0
NOTES:
NC DEPARTMENT OF TRANSPORTATION
DIVISION OF HIGHWAYS
** SITE 7 DOWNSTREAM SITE 8 BUFFER IMPACTS REMOVED DUE TO UTILITY EASEMENT MAINTENANCE AND 4C DISCUSSION 04/02/2021
WAKE COUNTY
U-2719
35869.3.1
Revised 2018 Feb SHEET OF

Submitted 4/23/2021
.
WETLANDS IN BUFFER IMPACTS SUMMARY
.
WETLANDS IN
BUFFERS
SITE ZONE 1 ZONE 2
NO. STATION (FROM/TO) (ft2) (ft2)
6 WF 392 876
10 WZAA 348
TOTAL: 740 876
NC DEPARTMENT OF TRANSPORTATION
DIVISION OF HIGHWAYS
04/02/2021
WAKE COUNTY
U-2719
35869.3.1
Revised 2018 Feb I SHEET OF
Rev. Jan 2009