HomeMy WebLinkAbout20180322 Ver 1_(Wood Site) - Memo & Figures_20180307
Pre‐Construction Notification Memorandum
To: Andrew Williams – US Army Corps of Engineers
Karen Higgins – North Carolina Division of Water Resources
From: Ian Eckardt, PWS
Date: March 6, 2018
Re:
Pre‐Construction Notification Pursuant to Nationwide Permit No. 27
and Water Quality Certification No. 4087
Disaster Recovery Act Technical Services (DRATS) – Stream Repair Project (Wood
Site) Lee County, North Carolina
Wildlands Engineering, Inc. (Wildlands) is submitting a Pre‐Construction Notification (PCN) package for a
proposed stream repair project that will involve fallen tree removal and channel enhancement to
approximately 1,112 linear feet (LF) of Lick Creek. The project area is located immediately downstream
of Lick Creek Road approximately four miles northeast of downtown Sanford, North Carolina in central
Lee County on agricultural land owned by Chris Wood (Figures 1 ‐ 3). An Agent Authorization Form is
attached which provides verification that Wildlands is acting on behalf of Mr. Wood.
Project Overview
The project work is primarily funded by the Disaster Recovery Act of 2016 to help communities and
citizens recover from damage that resulted from Hurricane Matthew and wildfires. Heavy flooding from
Hurricane Matthew resulted in numerous fallen trees and bank erosion throughout the portion of Lick
Creek on the Wood property. The proposed work involves removing fallen trees, stream enhancement,
and bank stabilization to approximately 1,112 LF of Lick Creek. Proposed stream enhancement will
involve natural channel design techniques including the construction of in‐stream structures and
reshaping of bed material to center flow within the channel. In‐stream structures will include angled log
sills, boulder spur vanes, and log vanes to improve stream functionality and stability. Bank stabilization
will be a combination of bank grading and engineered structures. Bank grading will involve laying back
banks at a 3:1 ratio, seeding, matting, and planting with native riparian species. Additional bank
stabilization will involve engineered structures including vegetated soil lifts, brush toe, and spot riprap
toe protection.
Jurisdictional Waters
Potential jurisdictional waters of the U.S. were delineated within and immediately adjacent to the
project area by Wildlands Engineering using the USACE Routine On‐Site Determination Method. This
method is defined by the 1987 U.S. Army Corps of Engineers (USACE) Wetlands Delineation Manual and
subsequent Eastern Mountain and Piedmont Regional Supplement. The only jurisdictional feature
identified in the project area was Lick Creek which is classified as Water Supply (WS) IV waters by the
North Carolina Department of Water Resources (NCDWR Index No. 18‐5‐(2)). Lick Creek has a drainage
area of approximately eight square miles at the upstream extend of the project area and an average
bankfull width of 20 LF. The channel exhibited continuous baseflow, frequent riffle/pool sequences,
frequent deposition bars, and supported aquatic biota (including stoneflies & Asiatic clams) indicative of
a perennial stream. Lick Creek received a score of 43.5 using the NCDWR Stream Identification Form
(Version 4.11) supporting a perennial stream determination. No wetlands were observed within or
immediately adjacent to the project area. Representative upland data points (DP 1 – 2) were taken
during the delineation. One floodplain swale feature was observed in the left floodplain of Lick Creek at
station 3+30 on the plan sheets. During the site visit the swale was dry and lacked hydric soil indicators.
See Figure 4 for the location of delineated resources and data points. A NCDWR Stream Classification
Form and USACE Wetland Determination Data Forms representative of non‐jurisdictional uplands are
enclosed with this submittal.
Soils
Soil types within the proposed project area are mapped by the Natural Resource Conservation Service
(NRCS) as Chewacla silt loam (Ch), Congaree silt loam (Cp), and Mayodan fine sandy loam (MfE) Enon
sandy loam (EnD) and Monacan soils (MO). The Chewacla silt loam is classified a as somewhat poorly
drained soil found on floodplains. The unit typically experiences frequent flooding put not ponding. The
Congaree silt loam is classified as a moderately well‐drained soil commonly found on floodplains. The
unit is listed as frequently experiencing flooding but not ponding. The Mayodan fine sandy loam is a
well‐drained soil generally found on uplands including hillsides and Enon sandy loam is a well‐drained
soil found on hillslopes. The unit typically doesn’t experience flooding or ponding. On‐site soils are
mapped in Figure 5.
Proposed Impacts
The stream enhancement work will temporary impact 1,112 LF of Lick Creek (see Table 1 for impact
summary). Enhancement activities include reshaping the channel bed, installing in‐stream structures for
grade control and bank stability, bank grading/engineered structures, and planting native riparian
species along the project area. Measures to avoid and/or minimize impacts to Lick Creek include
avoiding relatively stable stream sections and limiting construction access only to the immediate project
area. Impacted areas will be reseeded and/or replanted with riparian species. If necessary, a pump
around system will be employed during stream construction. See Figure 6 for locations of stream
impacts.
Table 1: PCN Impact Summary Table
Potential
Jurisdictional
Feature
(Perennial/
Intermittent) Impact Type NWP
Plan
Sheet(s)
Temporary
Impacts
(LF/AC)
Permanent
Impacts
(LF/AC) Notes/Comments
Lick Creek (P) Enhancement ‐
Stabilization 27 1.1 299
Lick Creek (P) Enhancement ‐
Stabilization 27 1.1 – 1.3 749
Lick Creek (P) Enhancement ‐
Stabilization 27 1.3 64
Total Temporary
Impacts 1,112 LF
Total Permanent
Impacts
The following supporting data is included with this submittal:
Vicinity, USGS Topographic, Parcel, Existing Conditions, Soils, and Impact Site Maps
photolog,
USACE Routine Wetland Determination Forms and NCDWR Stream Classification Form,
11” x 17” copy of the plan set.
03030003060080
03030004010010
03030003060050
03030004010020
0303000405003003030004050010
Hydrologic Unit Code (14 digit)
Project Parcel
Figure 1: Vicinity MapDisaster Recovery Act Technical Services (DRATS)Stream Repair Project - Wood Site Cape Fear River Basin 030300 4
Lee County, NC
¹0 1 Mile s
2017 Aeri al Photography
Project Parcel
Project Area
Figure 2: Vicinity MapDisaster Recovery Act Technical Services (DRATS)Stream Repair Project - Wood Site Cape Fear River Basin 030300 4
Lee County, NC
¹0 1,000 Fee t
Moncure, NC USGS 7.5' Topographic Quadrangle
CHRISTOPHER S.WOOD9664-40-4577-00
Project Parcel
Project Area
Project Stream
Figure 3: Parcel MapDisaster Recovery Act Technical Services (DRATS)Stream Repair Project - Wood Site Cape Fear River Basin 030300 4
Lee County, NC
¹0 400 Fee t
2017 Aeri al Photography
!(
!(
(
(
(
(
(
(
(
(
(
DP1
DP2
1
2
3
4
7
9
8
5
6
Project Parcel
Project Area
Project Stream
!(Data Points
(Photolog Locations
Figure 4: Site MapDisaster Recovery Act Technical Services (DRATS)Stream Repair Project - Wood Site Cape Fear River Basin 030300 4
Lee County, NC
¹0 200 Fee t
2017 Aeri al Photography LickCreek
!(
!(
(
(
(
(
(
(
(
(
(
DP1
DP2
ToB
Ch
ToB
MfE
MfD
MfD
MfD
MfB
MfD
Cp
1
2
3
4
7
9
8
5
6
Ch - Chewacla silt loam, 0-2% slopes
Cp - Congaree silt loam , 0-2% slopes
MfB - Mayodan fine sandy loam, 2-8% slopes
MfD - Mayodan fine sandy loam, 8-15% slopes
MfE - Mayodan fine sandy loam, 15-25% slopes
ToB - Tillery fine sandy loam, 1-4% slopes
Project Parcel
Project Area
Project Stream
!(Data Points
(Photolog Locations
Figure 5: Soils MapDisaster Recovery Act Technical Services (DRATS)Stream Repair Project - Wood Site Cape Fear River Basin 030300 4
Lee County, NC
¹0 200 Fee t
2017 Aeri al Photography LickCreek
Stream Impact (S1)
Stream Impact (S2)
Stream Impact (S3)
Project Parcel
Project Area
Project Stream
Proposed Stream Impacts
Figure 6: Impact MapDisaster Recovery Act Technical Services (DRATS)Stream Repair Project - Wood Site Cape Fear River Basin 030300 4
Lee County, NC
¹0 200 Fee t
2017 Aeri al Photography LickCreek