20201835 Ver 1_PreFiling Email 30-Day Clock Reached Email_20201231

Strickland, Bev
From:
[e-mail]
Sent:
Thursday, December 31, 2020 12:01 AM
To:
[e-mail]
Cc:
Mairs, Robb L
Subject:
Pre -Filing Time Clock has been reached for Reduction of Nutrient Loading to
Greenfield Lake from Jumping Run Branch, Wilmington, North Carolina, Phase I -
20201835 Ver 1
Attachments:
DWR Pre -Filing Meeting Request Form.pdf
The North Carolina Division of Water Resources has received the Pre -Filing Meeting Request Form for Reduction of
Nutrient Loading to Greenfield Lake from Jumping Run Branch, Wilmington, North Carolina, Phase I that you submitted on
11/30/2020. The ID number for that project is 20201835, Version 1.
Your Pre -Filing Meeting Request has now reached the 30 calendar days' requirement and your application can now be
accepted.
When you submit your application please upload a copy of the attached document in this email.
This email was automatically generated by Laserfiche workflow. Please do not respond to this email address, as
responses are not monitored.

ID#* 20201835
Version* 1
Regional Office* Wilmington Regional Office - [phone]
Reviewer List* Robb Mairs
Pre -Filing Meeting Request submitted 11/30/2020
Contact Name*
Contact Email Address*
Project Name*
Project Owner*
Project County*
Owner Address:
Dawn York
[e-mail]
Reduction of Nutrient Loading to Greenfield Lake from Jumping Run
Branch, Wilmington, North Carolina, Phase I
Cape Fear River Watch
New Hanover
Street Address
617 Surrey Street
Address Line 2
City
Wilmington
Fbstal / Zip Code
28401
Is this a transportation project?* (- Yes o No
Type(s) of approval sought from the DWR:
141 401 Water Quality Certification - 1— 401 Water Quality Certification -
Regular Express
I— Individual Permit I— Modification
I— Shoreline Stabilization
Does this project have an existing project ID#?*
C Yes (-- No
State / Rovince / Fbgion
NC
Country
USA
Do you know the name of the staff member you would like to request a meeting with?
Please give a brief project description below.*
Greenfield Lake, in urban Wilmington, N.C. suffers from green and
blue-green algal blooms (Vander Borgh 2014), bottom -water hypoxia,
fish kills, and high fecal coliform bacterial counts. The lake was
placed on the NC 303(d) list in 2014 for excessive chlorophyll a.
Mallin et. al. (2016) from UNC Wilmington detailed the lake's
eutrophication and poor water quality and determined that
nhvtnnlanktnn arowth in the lake was hinhly stimulated by nitrnnen

(N) inputs. However, blooms of the N-fixing cyanobacterium
Anabaena dominate in summer (a N-fixing species basically captures
its own N if enough phosphorus (P) is present). Thus, phosphorus is
also important in driving the lake's eutrophication. A 2018 M.S. thesis
by Nick Iraola of the UNC Wilmington Center for Marine Sciences
determined that two of the five perennial streams feeding the lake,
Jumping Run Branch and Squash Branch, provided the vast majority
of stream -derived inorganic N and P to the lake.
As such, a consortium of stakeholders (City of Wilmington, Cape Fear
River Watch, UNCW, NC State University and Moffatt & Nichol)
received funds from the DEQ 319 program to reduce nutrient loading
from Jumping Run Branch to the lake to curb eutrophication through
reduced nutrient inputs, lower chlorophyll a concentrations, and an
improved lake ecosystem. These efforts will eventually lead to the
removal of the lake from the 303(d) list.
This effort is coordinated by Ms. Dana Sargent of Cape Fear River
Watch, a non-profit that currently manages the Greenfield Lake
Boathouse through a contract with the City of Wilmington, and
conducts environmental education activities, ecotours, and clean-ups
in Greenfield Lake and its tributaries.
This proposed project focuses on improvements in nutrient reduction
to Jumping Run Branch as the City of Wilmington owns land along its
path and is a partner in this proposal, providing ongoing maintenance
as well as access and permission to modify the property.
The first phase of the project, and the subject of this pre -filing
notification, includes the modification of two existing impoundments in
Jumping Run Branch (Willard Street upper and lower wet ponds) to
improve pollutant removal performance; management of existing
vegetation; retrofit of an existing wet pond by installing improved riser
structures to extend detention time and extensive monitoring and
assessment in key locations by UNCW researchers to quantity the
effects on water quality and denitrification process; providing
environmental education and outreach to local residents.
Neither impoundment currently has a riser or similar outlet control
structure. Both have piped outlets that create minimal detention time
according to preliminary hydrologic and hydraulic (H&H) analyses. A
riser structure would be added to both to increase detention time
substantially and improve removal of a variety of pollutants. The
upper impoundment (Figures 1 and 2) has areas of shallow open
water that direct runoff along a short path to the outlet, along with
higher areas that appear to be infrequently inundated. A substantial
amount of scour was also observed within the cell. Likely through two
phases of construction, this cell will be regraded to incorporate new
inlet pools for energy dissipation, create longer flow paths, excavate
high zones to convert them to wetland and add storage volume, make
portions of the open water area shallower to create wetland, and
plant the new wetland zones.
A United States Army Corps of Engineers (USACE) Nationwide Permit
(NWP) 43 is applicable as the project consists of conducting
maintenance of a stormwater management facility and incorporating
pollutant reduction green infrastructure features. The project will not
expand the existing footprint of the stormwater ponds, but will include
some grading, with possible new native planting and the addition of
risers.

Please give a couple of dates you are available for a meeting.
12/8/2020
12/9/2020
12/11 /2020
Please attach the documentation you would like to have the meeting about.
Jumping Run Branch Project Components
241.32KB
Annotated.pdf
Jumping Run Branch Vicinity Map.pdf 281.97KB
Project Progress Update_102020.pdf 1.06MB
pdf only
By digitally signing below, I certify that I have read and understood that per the Federal Clean Water Act Section
401 Certification Rule the following statements:
• This form completes the requirement of the Pre -Filing Meeting Request in the Clean Water Act Section 401 Certification
Rule.
• I understand by signing this form that I cannot submit my application until 30 calendar days after this pre -filing
meeting request.
• I also understand that DWR is not required to respond or grant the meeting request.
Your project's thirty -day clock started upon receipt of this application. You will receive notification regarding meeting location
and time if a meeting is necessary. You will receive notification when the thirty -day clock has expired, and you can submit an
application.
Signature
Submittal Date 11/30/2020