20200092 Ver 1_More Info Received_20201111

From:Bob Zarzecki
To:Goss, Stephanie; [e-mail]
Subject:[External] Trailwood Apartments (SAW-2020-00151 & DWR20-0092) - REVISED PLANS
Date:Wednesday, November 11, 2020 10:19:44 AM
Attachments:Trailwood Apartments - IMPACT MAPS (revised 11-11-2020).pdf
SAW-2020-00151 - NWP 12 Verification _SIGNED(corrected date).PDF
DWR20-0092_Trailwood Apartments.pdf
Importance:High
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Stephanie & Lyle:
It took some effort, but they were able to find a solution to the stream downcutting
issue described below in my October 23rd email.

Please refer to the attached revised plans titled “Trailwood Apartments – IMPACT
MAPS (revised 11-11-2020)”.

Here is a list of changes from the permitted plans (attached).

The originally proposed sewer crossing of Walnut Creek will been abandoned.
Prior to realizing the stream downcutting issue, they had installed silt fencing
and cleared the easement south of Walnut Creek. The easement north of
Walnut Creek was not cleared. They are proposing to remove the silt fencing
throughout and seed and mulch all disturbed areas. As Zone 1 was cleared
within the easement south of Walnut Creek, they are proposing to replant this
area with at least two (2) native hardwood tree species at a density of 320 trees
per acre. To do this, they are proposing to install at least six (6) ball & burlap
size swamp oak and river birch trees within Zone 1. These trees are consistent
with other trees in the area. In addition to the Zone 1 replanting, the City is
requiring them to revegetate the portion of the original sewer easement that will
become tree conservation area (TCA) at the rate of 2-10 gallon trees per 50 foot
linear increment.
The new proposed sewer crossing of Walnut Creek is depicted on the attached
revised plans. The sewer will still be jack & bored under Walnut Creek with no
impacts to the creek (the same as what was permitted for the original crossing
location). A minimum of 10.5” of cover will be maintained between the bottom of
the creek and the sewer line. The City has revised the revised plans and has
found them to be acceptable. The sewer crossing will be perpendicular with a
30’ easement (both construction and maintenance). The new manhole north of
the creek will be located within the existing maintained, cleared sewer corridor
as the existing manhole to which it will tie to.
As these revised plans meet the following regulatory criteria, we’re hoping that you
can concur that no additional permitting effort is needed (beyond this email
notification) and that the project may proceed under the current permits and these
revised plans.

No impacts to Walnut Creek are proposed.
No changes to the previously permitted 404/401 impacts.
The buffers within the previously permitted sewer crossing location will be
restored.
The new sewer crossing and two minor Zone 2 parallel impacts are considered
“deemed allowable” under the Neuse Buffer Rule (15A NCAC 02B .0714).

Please confirm if our understand is correct that the project may proceed as previously
permitted and these revised plans.

Kind regards,

BOB ZARZECKI
Wetlands Department Manager/Principal
Soil & Environmental Consultants, PA

From: Bob Zarzecki
Sent: Friday, October 23, 2020 1:30 PM
To: '[e-mail]' <[e-mail]>; [e-mail]
Subject: Trailwood Apartments (SAW-2020-00151 & DWR20-0092) - Sanitary Sewer Crossing
Potential Modifications
Importance: High

Stephanie & Lyle:
I wanted to give you a quick heads up about some potential changes to the permitted
impacts for this project.

The project is currently under construction. They have installed the silt fencing around
the limits of disturbance and cleared the sanitary sewer corridor south of Walnut
Creek. They have not yet installed the sewer line.

During construction survey, they discovered that it appears Walnut Creek has down
cut since the design survey used in the permit application. No impacts were proposed
to Walnut Creek in the PCN application as they were to bore and jack under the
creek, but the permit drawings showed a minimum of 12” of clearance between the
sewer line casing and the stream bed as depicted on sheet “EX-03” attached to the
NWP verification. The new survey indicates that they will not be able to maintain this
clearance and the casing could actually be at or just above the streambed.

They are actively looking at solutions to this issue, and I have been advising them of
the potential permitting options for each solution, but it seems evident at this time that
we’ll be at the very least submitting revised plans for your review and possible permit
modifications. They are hoping to figure out the solution by early next week. I’ll be in
touch as soon as the solution is determined.
More to follow.

Please don’t hesitate to contact me if you have any questions.

Stephanie – Please remind me when you will be leaving the 401 & Buffer RRO group
again and who I should send this modification request to if after you leave?

Kind regards,

BOB ZARZECKI
Wetlands Department Manager/Principal
Soil & Environmental Consultants, PA
North Quarter Office Park
8412 Falls of Neuse Road, Suite 104
Raleigh, NC 27615
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Visit us at sandec.com

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