20231596 Ver 1_Symphony Lake Pre-Construction Notification (PCN) Form Submitted 11-21-2023 Updated Jan 2024_20240112

DWR
IDIOM— of Water Resources
Pre -Construction Notification (PCN) Form
For Nationwide Permits and Regional General Permits
(along with corresponding Water Quality Certifications)
October 2, 2023 Ver 4.3
Please note: fields marked with a red asterisk below are required. You will not be able to submit the form until all mandatory questions are answered.
Also, if at any point you wish to print a copy of the E-PCN, all you need to do is right -click on the document and you can print a copy of the form.
Below is a link to the online help file.
https://edocs. deq. nc. govfWaterResou rces/DocV iew. aspx?d bid=0&id=2196924
A. Processing Information
Pre -Filing Meeting Date Request was submitted on:
9/20/2023
If this is a courtesy copy, please fill in this with the submission date.
Does this project involve maintenance dredging funded by the Shallow Draft Navigation Channel Dredging and Aquatic Weed Fund or involve the distribution or transmission of energy or
fuel, including natural gas, diesel, petroleum, or electricity?"
O Yes OO No
Is this project connected with ARPA funding?"
O Yes OQ No
County (or Counties) where the project is located:"
Wake
Is this a NCDMS Project"
O Yes OO No
Click Yes, only if NCD MS is the applicant or co -applicant.
DO NOT CHECK YES, UNLESS YOU ARE DMS OR CO -APPLICANT.
Is this project a public transportation project?"
O Yes OO No
This is any publicly funded by municipal,state or federal funds road, rail, airport transportation project.
la. Type(s) of approval sought from the Corps:"
Q Section 404 Permit (wetlands, streams and waters, Clean Water Act)
❑ Section 10 Permit (navigable waters, tidal waters, Rivers and Harbors Act)
Has this PCN previously been submitted?"
* Yes
O No
1 b. What type(s) of permit(s) do you wish to seek authorization?"
O Nationwide Permit (NWP)
❑ Regional General Permit (RGP)
❑ Standard (IP)
1c. Has the NWP or GP number been verified by the Corps?"
U Yes U No
Nationwide Permit (NWP) Number: 03 - Maintenance
NWP Numbers (for multiple NWPS):
List all NW numbers you are applying for not on the drop down list.
1 d. Type(s) of approval sought from the DWR:
check all that apply
Q 401 Water Quality Certification - Regular ❑ 401 Water Quality Certification - Express
❑ Non-404 Jurisdictional General Permit ❑ Riparian Buffer Authorization
❑ Individual 401 Water Quality Certification
le. Is this notification solely for the record because written approval is not required?

For the record only for DWR 401 Certification:
For the record only for Corps Permit:
Q Yes OQ No
O Yes OQ No
1f. Is this an after -the -fact permit application?"
Yes v No
1g. Is payment into a mitigation bank or in -lieu fee program proposed for mitigation of impacts?
If so, attach the acceptance letter from mitigation bank or in -lieu fee program.
O Yes O No
Acceptance Letter Attachment
Click the upload button or drag and drop files hereto attach document
FILE TYPE MUST BE PDF
1 h. Is the project located in any of NC's twenty coastal counties?"
Yes No
1j. Is the project located in a designated trout watershed?"
O Yes OO No
Linkto trout information: http://www.saw.usace.army.miI/Missions/Regulatory-Permit-Program/Agency-Coordination/Trout.aspx
B. Applicant Information
la. Who is the Primary Contact?"
Nancy Oberle
1c. Primary Contact Phone:"
1 b. Primary Contact Email" (xxx)xxx-xxxx
[e-mail] [phone]
1d. Who is applying for the permit?"
Owner ❑ Applicant (other than owner)
(Check all that apply)
1e. Is there an AgentlConsultant for this project?"
U Yes U No
2. Owner Information
2a. Name(s) on recorded deed:"
Town of Cary, ATTN: Billy E. Lee
2b. Deed book and page no.:
2c. Contact Person:
(for Corporations)
2d.Address*
Street Address
PO Box 8005
Address Line 2
City
State / Province / Region
Cary
NC
Postal /Zip Code
Country
27512-8005
USA
2e. Telephone Number:"
(xxx)xxx-xxxx
[phone]
2f. Fax Number:
2g. Email Address:"
Billy. [e-mail]
4. Agent/Consultant (if applicable)
4a. Name:"
Nancy Oberle
4b. Business Name:
inapplicable)
Three Oaks Engineering

4c. Address"
Street Address
324 Blackwell Street, Suite 1200
Address Line 2
City
Durham
Postal /Zip Code
27701
4d. Telephone Number:"
[phone]
4f. Email Address:"
[e-mail]
C. Project Information and Prior Project History
1. Project Information
1a. Name of project:"
Town of Cary Dredging Project at Symphony Lake
1b. Subdivision name:
(if appropriate)
1c. Nearest municipality/town:"
Cary
2. Project Identification
State / Province / Region
NC
Country
USA
4e. Fax Number:
(xxx)xxx-xxxx
2a. Property Identification Number:
2b. Property size:
(tax PIN or parcel ID)
(in acres)
075108991875,076105094703
27.6
2c. Project Address
Street Address
13001 Regency Parkway
Address Line 2
City
State / Province / Region
Cary
NC
Postal /Zip Code
Country
27518
USA
2d. Site coordinates in decimal degrees
Please collect site coordinates in decimal degrees. Use between 4-6 digits (unless you are using a survey -grade GPS device) after the decimal place as appropriate, based on how the location was
determined. (For example, most mobile phones with GPS provide locational precision in decimal degrees to map coordinates to 5 or 6 digits after the decimal place.)
Latitude:" Longitude:"
35.727618-78.796624
ex: 34.208504-77.796371
3. Surface Waters
3a. Name of the nearest body of water to proposed project:"
Symphony Lake (Regency Lake)
3b. Water Resources Classification of nearest receiving water:"
WS-III, NSW
Surface Water Lookup
3c. What river basin(s) is your project located in?"
Neuse
3d. Please provide the 12-digit HUC in which the project is located."
030202011001
River Basin Lookup
u
l^J
lJ
4. Project Description and History

4a. Describe the existing conditions on the site and the general land use in the vicinity of the project at the time of this application:*
Symphony Lake (Regency Lake) is a man-made impoundment within the Town of Cary. It sits next to the Koka Booth Amphitheater off of Regency Parkway. The lake is approximately 27
acres in size and is mostly buffered by forest around most of its perimeter. The land use in the vicinity is made up of commercial and residential uses and some forested areas. The lake is
approximately 0.4 mile upstream of Swift Creek.
4b. Have Corps permits or DWR certifications been obtained for this project (including all prior phases) in the past?*
Q Yes QQ No Q Unknown
4f. List the total estimated acreage of all existing wetlands on the property:
2.38
4g. List the total estimated linear feet of all existing streams on the property:
(intermittent and perennial)
363
4h. Explain the purpose of the proposed project:*
The purpose of the proposed project is to dredge Symphony Lake. The lake has filled with sediment, reducing the amount of water the lake can hold.
4i. Describe the overall project in detail, including indirect impacts and the type of equipment to be used: *
Crews will access the lake from the amphitheater using an existing greenway, specifically, access will be from the west from Regency Parkway via the greenway. A temporary bridge
will be installed over an existing bridge crossing along the greenway as a stream crossing for equipment, requiring some impacts to the stream. A staging, stockpiling, and dewatering
area next to the lake will avoid impacting a wetland on the northern side of the lake. Since the bridge area is already in a cleared, maintained location and the stockpiling area is greater
than 50 feet from the lake, no buffer impacts will occur as part of this project. Dredged material will be transported off site to the South Cary Wastewater Treatment Plant for disposal in a
decommissioned sludge lagoon. Access is limited to Town of Cary property.
Indirect impacts are not anticipated as a result of the proposed project.
Typical construction equipment, such as trucks, excavators, and dozers, will be used during the project.
5. Jurisdictional Determinations
V.YH sve the wetlands or streams been delineated on the propel Mr proposed impact areas?* Unknown
CComments:Adam Efird, PWS, submitted PJD Package via email on 6/20/23
5b. If the Corps made a jurisdictional determination, what type of determination was made?*
Q Preliminary Q Approved QQ Not Verified Q Unknown Q N/A
Corps AID Number:
Example: SAW-2017-99999
SAW-2023-01253
5c. If 5a is yes, who delineated the jurisdictional areas?
Name (if known): Byron Levan
Agency/Consultant Company: Three Oaks Engineering
Other:
6. Future Project Plans
6a. Is this a phased project?*
O Yes OO No
Are any other NWP(s), regional general permit(s), or individual permits(s) used, or intended to be used, to authorize any partof the proposed projector related activity? This includes other
separate and distant crossing for linear projects that require Department of the Army authorization but don't require pre -construction notification.
D. Proposed Impacts Inventory
1. Impacts Summary
1a. Where are the impacts associated with your project? (check all that apply):
Q w@#aacle M Streams -tributaries E2 94#8s
Q Open Waters ❑ Pond Construction
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2g. Total T-QMPQFaFYWQtIand impact
0.260
0.000
2i. Comments:
Wetland Impacts are being avoided.
3. Stream Impacts
If there are perennial or intermittent stream impacts (including temporary impacts) proposed on the site, then complete this question for all stream sites impacted.
"S." will be used in the table below to represent the word "stream".
3a. Reason for im pact" (?)
3b.lmpact type"
3c. Type of impact"
3d. S. name"
3e. Stream Type"
M
3f. Type of
Jurisdiction"
3g. S. width"
3h. Impact
length"
S1
Temporary Crossing
p Y 9
Permanent
Fill :]Fo
ift Creek
__]
Perennial
Both
25
Average (feet)
21
Qinear feet)
S2 Temporary Crossing Temporary Fill UT to Swift Creek Perennial Both 25 20
** All Perennial or Intermittent streams must be verified by DWR or delegated local government.
3i. Total jurisdictional ditch impact in square feet:
0
3i. Total permanent stream impacts:
21
3i. Total temporary stream impacts:
20
3i. Total stream and ditch impacts:
41
3j. Comments:
As noted in the attached permit drawings, the stream crossing will be designed by the contractor. The crossing will occur at an existing bridge along the greenway. The current bridge cannot handle
the weight of construction equipment, so a construction access bridge will be installed on top of the existing bridge. Permanent stream impacts will only consist of gabions being installed to help
stabilize the stream banks. Gabions will be keyed into the stream bed, but will not extend out from it. The gabions will remain after the project is completed. Temporary impacts will not require
dewatering the stream, but may cause some turbidity. The crossing will be constructed in accordance with NCDOT requirements for temporary stream crossings. Upon completion of construction,
the contractor shall remove the stream crossing and restore disturbed areas, where required.
4. Open Water Impacts
If there are proposed impacts to lakes, ponds, estuaries, tributaries, sounds, the Atlantic Ocean, or any other open water of the U.S. then individually list all open
water impacts below.
4a1. Impact Reason
4b. Impact type" (?)
4c. Name of waterbody (?)
4d. Activity type"
4e. Waterbody type"
4f. Impact
area"
Site 2
Dredging
T
Symphony Lake
Dredging
Lake
(acres)
4g. Total temporary open water Impacts:
4.00
4g. Total permanent open water impacts:
0.00
4g. Total open water impacts:
4.00
4h. Comments:
Dredging area is approximately 3.6 acres. The estimated volume of dredging materials is 12,400 cubic yards. The lake will be restored to its original
depth and contours. Dredged material will be temporarily placed on -site in a designated location, then moved to a permanent, upland disposal site.
Dredging will result in temporary turbidity within the lake, however, that will be entirely contained within the lake and not impact any downstream waters.
R Qrrff..r Iw.r..e�.+c Ifr.r rMAIDA

6a. Project is in which protect basin(s)?"
Check all that apply.
44"" ❑ Tar -Pamlico
Catawba ❑ Randleman
Goose Creek ❑ Jordan Lake
❑ Other
6b. Impact Type"(')
6c. Per or Temp"(')
6d. Stream name"
6e. Buffer mitigation required?"
6f. Zone 1 impact"
6g. Zone 2 impact"
AlIg ... @ble blieeR A
F
E
', S
6h. Total buffer impacts:
Zone 1 Zone 2
Total Temporary impacts:
Zone 1 Zone 2
Total Permanent impacts: 0.00 0.00
Zone 1 Zone 2
Total combined buffer impacts:
6i. Comments:
Buffer impacts are no longer proposed, as the existing bridge is proposed for the construction access
E. Impact Justification and Mitigation
1. Avoidance and Minimization
1a. Specifically describe measures taken to avoid or minimize the proposed impacts in designing the project:"
This project has been designed with as few crossings of jurisdictional features as possible. The crossing will be designed to minimize jurisdictional
impacts by avoiding features wherever possible. There will be impacts to a UT to Swift Creek, but riparian buffer and wetland impacts have been avoided. Impacted areas will be
restored to pre -construction conditions once construction is complete. Access is limited to Town of Cary property, which is why the stream impacts are unavoidable.
1 b. Specifically describe measures taken to avoid or minimize the proposed impacts through construction techniques:"
Erosion and sedimentation BMPs will be installed prior to construction. A turbidity curtain will be installed downstream of dredging activities. Impacts will be minimized by strict
enforcement of Best Management Practices for the protection of surface waters, restrictions against the staging of equipment in or adjacent to waters of the US and coordination
with appropriate environmental staff.
2. Compensatory Mitigation for Impacts to Waters of the U.S. or Waters of the State
2a. Does the project require Compensatory Mitigation for impacts to Waters of the U.S. or Waters of the State?
Yes No
2b. Ifthis project DOES NOT require Compensatory Mitigation, explain why:
Impacts to streams have been minimized as much as possible. What impacts are expected are small but unavoidable. limpacted areas will be restored to pre -construction
conditions once construction is complete.
NC Stream Temperature Classification Maps can be found under the Mitigation Concepts tab on the Wilmington District's RIBITS website.
F. Stormwater Management and Diffuse Flow Plan (required by DWR)
*** Recent changes to the stormwater rules have required updates to this section .***
1. Diffuse Flow Plan
1a. Does the project include or is it adjacent to protected riparian buffers identified within one of the NC Riparian Buffer Protection Rules?
Yes Q No
0
LJ
1 b. All buffer impacts and high ground impacts require diffuse flow or other form of stormwater treatment. If the project is subject to a state implemented riparian buffer protection program,
include a plan that fully documents how diffuse flow will be maintained.
All Stormwater Control Measures (SCM)s must be designed in accordance with the NC Stormwater Design Manual. Associated supplement forms and other documentation shall be
provided.

What type of SCM are you providing?
❑ Level Spreader
Q Vegetated Conveyance (lower SHWT)
Q Wetland Swale (higher SHWT)
❑ Other SCM that removes minimum 30% nitrogen
Proposed project will not create concentrated stormwater flow through the buffer
(check all that apply)
For a list of options to meet the diffuse flow requirements, click here.
2. Stormwater Management Plan
2a. Is this a NCDOT project subject to compliance with NCDOT's Individual NPDES permit NCS000250?"
O Yes OO No
2b. Does this project meet the requirements for low density projects as defined in 15A NCAC 02H .1003(2)?"
U Yes U No
To look up low density requirement click here 15A NCAC 02H .1003(2).
Comments:
G. Supplementary Information
1. Environmental Documentation
la. Does the project involve an expenditure of public (federal/state/local) funds orthe use of public (federal/state) land?"
Yes Q No
1 b. If you answered "yes" to the above, does the project require preparation of an environmental document pursuant to the requirements of the National or State (North Carolina)
Environmental Policy Act (NEPA/SEPA)?"
v Yes No
Comments:"
This project will not have any state or federal funding, as it is being funded by the Town of Cary. Therefore, no environmental document has been
prepared.
2. Violations (DWR Requirement)
2a. Is the site in violation of DWR Water Quality Certification Rules (15A NCAC 2H .0500), Isolated Wetland Rules (15A NCAC 2H .1300), or DWR Surface Water or Wetland Standards or
Riparian Buffer Rules (15A NCAC 2B .0200)?"
O Yes No
3. Cumulative Impacts (DWR Requirement)
3a. Will this project (based on past and reasonably anticipated future impacts) result in additional development, which could impact nearby downstream water quality?"
C; Yes OO No
3b. If you answered "no," provide a short narrative description.
The project does not increase development or provide the opportunity for increased development. It is the dredging of an existing lake to provide
appropriate surface water storage.
4. Sewage Disposal (DWR Requirement)
4a. Is sewage disposal required by DWR for this project?"
O Yes OO No O N/A
5. Endangered Species and Designated Critical Habitat (Corps Requirement)
5a. Will this project occur in or near an area with federally protected species or habitat?"
Yes No
5b. Have you checked with the USFWS concerning Endangered Species Act impacts?"
Yes No
5c. If yes, indicate the USFWS Field Office you have contacted.
Raleigh
5d. Is another Federal agency involved?"
O Yes No O Unknown
5e. Is this a DOT project located within Division's 1-8?"
0 Yes OQ No

5f. Will you cut any trees in order to conduct the work in waters of the U.S.?"
OQ Yes O No
5g. Does this project involve bridge maintenance or removal?"
O Yes OQ No
Link to the NLEB SLOPES document: http://saw-reg.usace.army.mil/NLEB/1-30-17-signed_NLEB-SLOPES&apps.pdf
5h. Does this project involve the construction/installation of a wind turbine(s)?*"
O Yes OO No
5i. Does this project involve (1) blasting, and/or (2) other percussive activities that will be conducted by machines, such as jackhammers, mechanized pile drivers, etc.?"
Yes t7 No
5j. What data sources did you use to determine whether your site would impact Endangered Species or Designated Critical Habitat?"
IPaC checked on 09/26/2023. Michaux's sumac survey completed on 8/1/23, no individuals present. Bald eagle checked on 3/15/23 and 8/1/23, no
individuals or nests present. Due to the project's location within Symphony Lake and the backwater area immediately upstream (with no downstream
impact occurring), it has been determined that no habitat is present for aquatic species (confirmed by Three Oaks' licensed aquatic biologists). Habitat is
present for tricolored bat, this species will be addressed for the project once the species is officially listed and its effective date has been established. Per
NCNHP, no known occurrences within 1.0 mile.
6. Essential Fish Habitat (Corps Requirement)
6a. Will this project occur in or near an area designated as an Essential Fish Habitat?"
� Yes OO No
6b. What data sources did you use to determine whether your site would impact an Essential Fish Habitat?"
NOAA Essential Fish Habitat Mapper
7. Historic or Prehistoric Cultural Resources (Corps Requirement)
Linkto the State Historic Preservation Office Historic Properties Map (does not include archaeological data: http://gis.ncdcr.gov/h/hpoweb/
7a. Will this project occur in or near an area that the state, federal or tribal governments have designated as having historic or cultural preservation status (e.g., National Historic Trust
designation or properties significant in North Carolina history and archaeology)?"
�_ Yes No
7b. What data sources did you use to determine whether your site would impact historic or archeological resources?"
HPOWEB 2.0 - General Audience
8. Flood Zone Designation (Corps Requirement)
Link to the FEMA Floodplain Maps: https:Hmsc.fema.gov/portal/search
8a. Will this project occur in a FEMA-designated 100-yearfloodplain?"
Yes No
8c. What source(s) did you use to make the floodplain determination?"
FEMA Flood Map Service Center
Miscellaneous
Comments
U
Please use the space below to attach all required documentation or any additional information you feel is helpful for application review. Documents should be combined into one file when
possible, with a Cover Letter, Table of Contents, and a Cover Sheet for each Section preferred.
Click the upload button or drag and drop files here to attach document
Symphony Lake Dredging - Permit Drawings.pdf
23.74MB Stream Crossing proposal
Symphony Lake _FILLABLE_ AGENT _ AUTHORIZATION_FORM_Signed.pdf
82.53KB Revised Dredging Stockpile Plan New Submittals
Previously submitted
2023-11-9 Cary Symphony Lakes - ESC.pdf
1.77MB
TOC_SymphonyLake_PJD Package_06142023.pdf
4.11 MB
File must be PDF or KMZ
Signature
0 By checking the box and signing below, I certify that:
• The project proponent hereby certifies that all information contained herein is true, accurate, and complete to the best of my knowledge and belief', and
• The project proponent hereby requests that the certifying authority review and take action on this CWA 401 certification request within the applicable reasonable period of time.
• have given true, accurate, and complete information on this form;
• agree that submission of this PCN form is a "transaction" subject to Chapter 66, Article 40 of the NC General Statutes (the "Uniform Electronic Transactions Act'),
• I agree to conduct this transaction by electronic means pursuant to Chapter 66, Article 40 of the NC General Statutes (the "Uniform Electronic Transactions Act"),
• I understand that an electronic signature has the same legal effect and can be enforced in the same way as a written signature, AND
V

• I intend to electronically sign and submit the PCN form.
Full Name:"
Nancy Oberle
Signature"
Date
1 /12/2024

JOTION EN
G
REYNOLDS
COMPANY, INC.
S NCE 19A0
Date: 1-2-2024
TO: Town of Cary
Eric Kulz
CC:
Schnabel Engineering
Brendan Stepek
Submittal #: 2
Submittal Title: Abutment Protection for Existing Greenway
Spec Section #: 210000-1 Related
RE: Symphony Lake Dredging
Architect Project #: GG1188
Schnabel Project 22210081
FOR: 0 Approval ❑ Your Records ❑ Comment ❑ Other
Contractor: H.G. Reynolds Co., Inc.
0 Approved/Approved As Noted
❑ Rejected
❑ Revise & Resubmit
❑ For Record
Prior to Approval
Reviewed By: Bert Long
Signature:
Date: 1-2-2024

UO
REYNOLDS
S,N�
January 2, 2024
Mr. Eric Kulz
Town of Cary
316 N. Academy Street
Cary, NC 27513
RE: Symphony Lake Dredging
Abutment Protection
H.G. Reynolds Co., Inc. offers the following submittal for the protection of the existing greenway
trail bridge abutment. As noted in the engineer's report that follows, there was substantial bank erosion
that took place in two heavy rain events before the end of the year. Following submittal is our
suggestion for protecting the abutments of the greenway trial bridge that is along our access road for
the dredging operation. It is our opinion that leaving the gabions along the creek bank would be of
lasting benefit to the town. Work on the higher reaches of the bank will be removed and dressed up
Please review this submittal and advise acceptance. If there are questions, please let me know.
Sincerely,
H.G. Reynolds Co., Inc.
Bert- Lo-vx�g
Building a better community. I P.O. Box 209 Henderson, NC 27536 1 [phone]
www.hgreynolds.net

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Little Environments PLLC
Engineers & Environmental Consultants 22 Dec 2023
Memo:
Symphony Lake Greenway Bridge Abutment Erosion and
Sanitary Sewer Pipe Deflection in this Last Rain Storm Event
13 pages
To whom it may concern,
This letter is to express preliminary concerns relating to (a) greenway bridge abutment
erosion, (b) existing concrete abutment cracking on the greenway bridge that was exacerbated
by the erosion, and (c) deflection of the sanitary sewer just downstream from the greenway
bridge along with basal erosion around the sanitary sewer concrete stanchions.
Little Environments is working with HG Reynolds in the process of consulting on the
temporary crossing across the top of the existing greenway bridge that would bear atop the
existing abutments and associated concrete pads. Little Environments had a site meeting this
morning with HG Reynolds at the location. In the last two weeks we have had two intense rain
events that are likely in and around the 2 year storm event. I, Joseph Little PE, visited the sites
on the 4tn, 6tn, 14t", and 22"d. Between the 6t" and the 4t" there was the first storm event.
Between the 14t" and the 22" d there was the second event. From retrieved stream gauge data
as well as observing wash lines on the bank of the stream one can see that the water level rose
about 2' in additional depth in each event.
During this time there has been significant bank loss under the bridge. Water reached the
greenway bridge abutments. The following was observed:
1) Erosion of the soil adjacent the abutments by 1-2 horizontally on both sides. This
creates significant concern of destabilizing the greenway abutments regardless of future
traffic.
2) Significant cracking of the bearing beam on the western side of the greenway, enough
to be a structural concern. It appears this has been attempted to be repaired in the past
with grout.
3) Further the ductile iron sanitary sewer line just downstream from this location has
deflected at the retainer ring by more than 1" creating the risk of sewage release into
the creek. The stanchions on either side of the creek, supporting the sanitary sewer
crossing all seem to be undermined or eroded around.
It is my opinion that point No 3 above needs to be addressed immediately due to the potential
consequences of sewage release.

Little Environments PLLC
Engineers & Environmental Consultants
22 Dec 2023
It is my opinion that the abutments of the greenway bridge need to be protected from scour
immediately as not to add insult to injury of the compromised concrete abutment. Given that
the abutments I already significantly cracked, it is likely to crack further in the state it is already
in and when used as the bearing pad for the future temporary bridge to be placed atop. This
considered, it is not unsafe to use as the bearing pad given the following: (A) the soil
surrounding the abutment is protected from scour by secured means such as gabion mattresses
(Rip -wrap alone is insufficient) and (B) plans are made ahead of time to replace or significantly
repair the concrete abutments after use as the bearing pad for the temporary bridge.
I have attached photos from each date listed above. A site inspection is recommended to better
observe the issues of concern as the photos do not completely do problems at hand justice.
Sincerely,
it.
\Vq IIII////�
�� CARS //,
pQ�.�CEg S�0 ..
2cAno," y.
L
I_AL �•
r� 00859 =

Little Environments PLLC
Engineers & Environmental Consultants
DEC 22 Photos
22 Dec 2023

Little Environments PLLC
Engineers & Environmental Consultants 22 Dec 2023

Little Environments PLLC
Engineers & Environmental Consultants
22 Dec 2023
Prop
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Erosion of west bank
5

Little Environments PLLC
Engineers & Environmental Consultants 22 Dec 2023
Erosion of East bank

Little Environments PLLC
Engineers & Environmental Consultants
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22 Dec 2023
7

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Little Environments PLLC
Engineers & Environmental Consultants
DEC 4/6 Photos
MOFMT _"
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West bank
22 Dec 2023
12

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JOTION EN
G
REYNOLDS
COMPANY, INC.
S NCE 19A0
Date: 1-2-2024
TO: Town of Cary
Eric Kulz
CC:
Schnabel Engineering
Brendan Stepek
Submittal #: 2
Submittal Title: Abutment Protection for Existing Greenway
Spec Section #: 210000-1 Related
RE: Symphony Lake Dredging
Architect Project #: GG1188
Schnabel Project 22210081
FOR: 0 Approval ❑ Your Records ❑ Comment ❑ Other
Contractor: H.G. Reynolds Co., Inc.
0 Approved/Approved As Noted
❑ Rejected
❑ Revise & Resubmit
❑ For Record
❑ Prior to Approval
Reviewed By: Bert Long
Signature:
Date: 1-2-2024

UO
REYNOLDS
S,N�
January 2, 2024
Mr. Eric Kulz
Town of Cary
316 N. Academy Street
Cary, NC 27513
RE: Symphony Lake Dredging
Abutment Protection
H.G. Reynolds Co., Inc. offers the following submittal for the protection of the existing greenway
trail bridge abutment. As noted in the engineer's report that follows, there was substantial bank erosion
that took place in two heavy rain events before the end of the year. Following submittal is our
suggestion for protecting the abutments of the greenway trial bridge that is along our access road for
the dredging operation. It is our opinion that leaving the gabions along the creek bank would be of
lasting benefit to the town. Work on the higher reaches of the bank will be removed and dressed up
Please review this submittal and advise acceptance. If there are questions, please let me know.
Sincerely,
H.G. Reynolds Co., Inc.
Bert- Lo-vx�g
Building a better community. I P.O. Box 209 Henderson, NC 27536 1 [phone]
www.hgreynolds.net

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Little Environments PLLC
Engineers & Environmental Consultants 22 Dec 2023
Memo:
Symphony Lake Greenway Bridge Abutment Erosion and
Sanitary Sewer Pipe Deflection in this Last Rain Storm Event
13 pages
To whom it may concern,
This letter is to express preliminary concerns relating to (a) greenway bridge abutment
erosion, (b) existing concrete abutment cracking on the greenway bridge that was exacerbated
by the erosion, and (c) deflection of the sanitary sewer just downstream from the greenway
bridge along with basal erosion around the sanitary sewer concrete stanchions.
Little Environments is working with HG Reynolds in the process of consulting on the
temporary crossing across the top of the existing greenway bridge that would bear atop the
existing abutments and associated concrete pads. Little Environments had a site meeting this
morning with HG Reynolds at the location. In the last two weeks we have had two intense rain
events that are likely in and around the 2 year storm event. I, Joseph Little PE, visited the sites
on the 4tn, 6tn, 14t", and 22"d. Between the 6t" and the 4t" there was the first storm event.
Between the 14t" and the 22" d there was the second event. From retrieved stream gauge data
as well as observing wash lines on the bank of the stream one can see that the water level rose
about 2' in additional depth in each event.
During this time there has been significant bank loss under the bridge. Water reached the
greenway bridge abutments. The following was observed:
1) Erosion of the soil adjacent the abutments by 1-2 horizontally on both sides. This
creates significant concern of destabilizing the greenway abutments regardless of future
traffic.
2) Significant cracking of the bearing beam on the western side of the greenway, enough
to be a structural concern. It appears this has been attempted to be repaired in the past
with grout.
3) Further the ductile iron sanitary sewer line just downstream from this location has
deflected at the retainer ring by more than 1" creating the risk of sewage release into
the creek. The stanchions on either side of the creek, supporting the sanitary sewer
crossing all seem to be undermined or eroded around.
It is my opinion that point No 3 above needs to be addressed immediately due to the potential
consequences of sewage release.

Little Environments PLLC
Engineers & Environmental Consultants
22 Dec 2023
It is my opinion that the abutments of the greenway bridge need to be protected from scour
immediately as not to add insult to injury of the compromised concrete abutment. Given that
the abutments I already significantly cracked, it is likely to crack further in the state it is already
in and when used as the bearing pad for the future temporary bridge to be placed atop. This
considered, it is not unsafe to use as the bearing pad given the following: (A) the soil
surrounding the abutment is protected from scour by secured means such as gabion mattresses
(Rip -wrap alone is insufficient) and (B) plans are made ahead of time to replace or significantly
repair the concrete abutments after use as the bearing pad for the temporary bridge.
I have attached photos from each date listed above. A site inspection is recommended to better
observe the issues of concern as the photos do not completely do problems at hand justice.
Sincerely,
it.
\Vq IIII////�
�� CARS //,
pQ�.�CEg S�0 ..
2cAno," y.
L
I_AL �•
r� 00859 =

Little Environments PLLC
Engineers & Environmental Consultants
DEC 22 Photos
22 Dec 2023

Little Environments PLLC
Engineers & Environmental Consultants 22 Dec 2023

Little Environments PLLC
Engineers & Environmental Consultants
22 Dec 2023
Prop
= '� +-Y +fir _ _ - . - `� „ •� s 1�� } �"�� � • ^a -.�
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_� `i T
�r!Y- fir:'-- bJ� -�lI r i � ~ .�!! _ _�J RC`.: � �`.�• � _ yi
Erosion of west bank
5

Little Environments PLLC
Engineers & Environmental Consultants 22 Dec 2023
Erosion of East bank

Little Environments PLLC
Engineers & Environmental Consultants
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rrir_.ff � �•`
• • J ��� i �. "1t 'Y� `ti x'';++fir �. J� � �
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Erosion of West Bank, Note 2" Dia Root Exposed
22 Dec 2023
7

,7rt '
Ap
WORM

Little Environments PLLC
Engineers & Environmental Consultants
DEC 4/6 Photos
MOFMT _"
s
West bank
22 Dec 2023
12

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