20100425 Ver 2_Year 1 Monitoring Report_20120531

June 2012
Soil & Environmental Consultants, PA
11010 Raven Ridge Road Raleigh, North Carolma 27614 Phone [phone] Fax [phone]
www SandEC com
S &EC Project No 11609 D1 IDENR je. N CSU Project No 082059 [5 NCDENR —DWQ AY 3 1 2012 Attn Mr Ian McMillan 1650 Mail Service Center s �WATEH WALIr r
Raleigh North Carolina 27699 1650 a aranc
Reference Year One Monitoring Report
NCSU Centennial Campus N -4 Cluster Stream Restoration
Wake County, NC
DWQ Protect No 10 -0425, Ver 2
Enclosed please find the Year One Monitoring Report for the above referenced project As you
will find in the report, it is our opinion that the stream and its 50 foot riparian buffer have been
successfully restored and are currently functioning as intended
As per the approved monitoring plan dated February 14 2011 allowance was made for cessation
of site monitoring Based on the results of this year s monitoring and at the request of our client
we formally request consideration be given for cessation of site monitoring activities We will be
happy to discuss the site in more detail at your convenience
Please review the enclosed document and provide any comments at your earliest opportunity We
thank you for your assistance to date and look forward to the continued success of this project
Sincerely
SOIL & ENVIRONMENTAL CONSULTANTS, PA
David Cooper
Project Manager
Attachments Year One Monitoring Report dated June 2012
Cc Ms Lynn Swank North Carolina State University

NCSU Centennial Campus
N -4 Cluster Stream Restoration
Year One Monitoring Repo
Wake County, North Carohna
June 2012
Cataloging Unit — Neuse River Basin 03020201
Prepared For
North Carolina State University
NCSU Protect No 082059
Soil & Environmental Consultants, PA
11010 Raven Ridge Road Ralwgb, North Carolina 27614 Phone [phone] Fax [phone]
www SandEC com

Table of Contents
10 Introduction
11 Introduction
12 Protect History
13 Project Components
2 0 Monitoring
2 1 Methodology
2 11 Hydrologic Monitoring
2 12 Stream Stability Monitoring
2 13 Qualitative Vegetation Monitoring
2 2 Results
2 2 1 Hydrologic Monitoring Results
2 2 2 Stream Stability Monitoring Results
2 2 3 Qualitative Vegetation Monitoring Results
2 3 Evaluation of Restoration Success
Figure 1— USGS Vicinity Map
Appendix A — Monitoring Task Schedule
Appendix B — Monitoring Layout
Appendix C — Hydrology and Rainfall Data
Appendix D — Cross Sections at Restoration Reach Gauge Locations
Appendix E — Comparative Site Photos
Appendix F — As -Built Survey (By Turner Land Surveying, PLLC)
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10 INTRODUCTION
1 11 Introduction
tThis monitoring report has been prepared by Soil & Environmental Consultants PA (S &EC) to present
and evaluate site monitoring data for the period June 2011 through May 2012 for the North Carolina
State University (NCSU) Centennial Campus N 4 Cluster Stream Restoration project located in Raleigh
Wake County North Carolina
The restored stream drams to an unnamed tributary of Lake Raleigh/Walnut Creek (B NSW) in the
' Neuse River Basin (030402 27 34 (3 5) A vicinity map is included as Figure 1 As a condition of
approval of the 401 Water Quality Certification (dated November 30, 2010) The North Carolina
' Department of Natural Resources Division of Water Quality (DWQ) requested that this project be
monitored for a period of five (5) consecutive years This monitoring report provides data collected
during the first year of the five year monitoring period
12 Protect History
North Carolina State University restored a portion of stream at the NCSU Centennial Campus N 4
Cluster Site consisting of approximately 142 linear feet (LF) of previously degraded channel, and the
construction of an additional 49 LF of stream following the removal of an existing pipe Construction
' drawings for the stream restoration were prepared by Little & Little Landscape Architects PLLC of
Raleigh NC In March 2011, prior to construction S &EC installed a reference hydrology monitoring
gauge upstream of the restoration reach and ram gauge on site
Construction of the stream restoration was performed by Riverworks, Inc of Cary NC between July
2011 and August 2011 Construction oversight was provided by Little & Little Landscape Architects
' Following construction an as built survey of the restored stream was performed by Turner Land
Surveying PLLC of Raleigh NC in August 2011 For reference this survey is provided as Appendix F
' Subsequently hydrology gauges were installed within the restoration reach and monitoring of the
restored stream and buffers by S &EC began in August 2011 Planting of woody vegetation as per the
approved planting plan was performed by NCSU in November 2011
13 Protect Components
' As described on the approved Construction Drawings restoration of the N 4 Cluster stream included
(but was not limited to) a restored dimension pattern and profile of the stream the installation of rock
structures to provide for grade control and improve bed form construction of a concrete sill at the
upstream end of the restoration and installation of an impervious geomembrane to reduce the potential
for the loss of channel hydrology of the restoration reach
Prior to restoration of the stream the stream buffer and surrounding area was covered with Kudzu
(Puerarra lobata) As part of the restoration this invasive species was removed from the restored reach
the upstream buffer and the surrounding area to prevent future invasion The 50 foot stream buffer of
the restoration reach was then planted with woody tree and shrub species and seeded with herbaceous
ground cover

2 0 MONITORING
The purpose of monitoring of the restored stream and buffer is to document the overall effectiveness of
the restoration including stream stability comparative hydrology of the upstream reference reach and
the restored reach and the success of planted vegetation and absence of invasive species
Site monitoring will be performed for a period of five years or until approval is given by DWQ to
discontinue monitoring
This report serves as the Year One Monitoring report As per the agreed upon monitoring schedule
hydrologic data collection during Year One was performed monthly and stream stability monitoring
was performed quarterly The monitoring frequency for Years Two through Five will consist of
quarterly hydrology data collection and annual stream stability monitoring Monitoring reports will be
submitted to DWQ by June 1 S` each year For reference the schedule of specific monitoring tasks is
provided as Appendix A
Site monitoring dates and activities performed by S &EC during Year One are described in the following
table
Date
Activitv
February 16 2011
pre construction site observation
March 18, 2011
pre construction reference reach hydrology and rain gauge installation
April 22 2011
pre construction gauge download
June 27 2011
pre construction gauge download, monitoring device installation coordination
meeting with Contractor and Engineer
August 26 2011
post construction hydrology gauge installation and photo point establishment
overall observation
September 27 2011
gauge download and overall site observation
October 30, 2011
gauge download and overall site observation
November 28 2011
gauge download, photo monitoring planting observation overall site
observation
December 27 2011
gauge download and overall site observation
January 30 2012
gauge download and overall site observation
February 29 2012
gauge download photo monitoring and overall site observation
March 29 2012
gauge download and overall site observation
April 30 2012
gauge download and overall site observation
May 9 2012
gauge download photo monitoring and overall site observation
2 1 Methodology
This section includes information concerning, 1) hydrologic monitoring 2) qualitative stream stability
monitoring and 3) qualitative vegetation monitoring These data will be used for comparison with data
from subsequent monitoring years
2 11 Hydrologic Monitoring
A total of three (3) Infinities U S A hydrology monitoring gauges were installed on the site
along with a single Infinities U S A rain gauge On March 18 2011 prior to construction of the
stream restoration one hydrology monitoring gauge was installed immediately upstream of the
restored stream reach to record hydrologic conditions adjacent to the reference reach At this
2

time, the ram gauge was also installed to document site rainfall On August 26 2011,
immediately following construction of the stream restoration, two hydrology monitoring gauges
were placed adjacent to the restored stream channel one adjacent to a raffle and one adjacent to a
pool The locations of all hydrology monitoring gauges are shown in Appendix B on the
Monitoring Layout (Sheet 1)
2 12 Stream Stability Monitoring
Sixteen (16) photographic monitoring points were established to qualitatively document stream
stability The locations of these photo points are shown in Appendix B (Sheet 1) To assess
continued channel stability during Year One photographs were taken at quarterly intervals for
comparison As required by DWQ stream stability documentation at photographic monitoring
points during Years Two through Five will be performed on an annual basis
2 13 Qualitative Vegetation Monitoring
No specific vegetation monitoring or survival criteria were established by DWQ for this project
however qualitative evaluation and observations of planted specimens, herbaceous ground
cover and invasive plant species were made during monthly monitoring visits
2 2 Results
This section includes a summary and discussion of site monitoring results for hydrology stream
stability and vegetation For additional information, the interested reader is referred to the appendices
2 2 1 Hydrologic Monitoring Results
Data collected by the upstream reference gauge and the two restoration reach gauges was
compared to observe the effectiveness of the impervious geomembrane in reducing hydrologic
loss from the restoration reach
Prior to the construction of the restored section of stream water level at the upstream reference
gauge was generally between 2 and 8 inches below the ground surface During the construction
period between June 17'h and around August 6t' 2011 when a temporary coffer dam was in place
immediately upstream of the restoration reach the water level in the reference reach increased
fluctuating between approximately I and 18 inches above the ground surface Following
construction and removal of the coffer dam water level at the upstream reference gauge has
generally fluctuated between approximately 0 85 inch above and 5 inches below the ground
surface
Water level at restoration reach Gauge 1 adjacent to a riffle showed distinct increases in
response to recorded rain events Rainfall driven water level increases of 5 inches were common
throughout Year One monitoring Gauge 1 however, did not show a change in water level due to
the presence and subsequent removal of a check dam at the downstream end of the restoration
suggesting that the flooding effects of this dam did not extend upstream as far as the gauge
location Water level at Gauge 1 has averaged 18 38 inches below the ground surface over the
course of this year s monitoring with a maximum level of 12 56 inches below the ground
surface

Restoration reach Gauge 2 adjacent to a pool showed more uniform hydrology, with water
levels fluctuating less drastically in response to rainfall events The maximum rainfall driven
water level increase at this gauge was approximately 3 inches Water level at Gauge 2 however
was more affected by the presence and subsequent removal of the check dam at the downstream
end of the restoration Water level at Gauge 2 has averaged 17 02 inches below the ground
surface over the course of Year One monitoring with a maximum level of 9 6 inches below the
ground surface
Rainfall recorded during 2011 (for the period March 18 2011 through December 31 2011) was
23 82 inches Rainfall recorded to date during 2012 (for the period January 1 2012 through May
9 2012) was 11 90 inches
Hydrologic and rainfall data are presented graphically in Appendix C
For reference cross sections at each hydrology gauge location are presented in Appendix D
2 2 2 Stream Stability Monitoring Results
Based on a comparison of photos taken at quarterly intervals and general observation of the
condition of the restored stream during monthly monitoring visits the stream appears to have
maintained its constructed dimension pattern and profile with no indications of departure
Natural sediment transport and sorting of stream bed material was observed, including the
formation and migration of bars and deposition of sediment No excessive erosion around or
beneath any structures or down cutting of riffles was observed Any evidenced erosion bare
banks or failing structures observed in future monitoring years will be documented and a plan
implemented to repair problem areas
Comparative site photographs are presented in Appendix E The as built survey of the restored
stream reach (by Turner Land Surveying PLLC) is provided as Appendix F
2 2 3 Qualitative Vegetation Monitoring Results
Although no specific vegetation monitoring or survival criteria were established by DWQ for
this project observations of planted specimens made during monthly monitoring visits suggest a
survival rate of close to 100% The use of large, containerized trees and shrubs within the stream
buffer has led to the rapid beginning of a new canopy over the restored section of stream
channel Volunteer woody trees and shrubs were not observed within the restoration reach
buffers during Year One monitoring
Herbaceous ground cover from temporary and permanent seeding measures was observed to be
generally vigorous and dense and very few areas were noted to be occasionally sparse in
herbaceous cover during the course of monitoring Overseeding of bare areas adjacent to the
stream was performed following the removal of the downstream check dam, and subsequent drop
in water elevation Temporary herbaceous ground cover grew to a height of over five feet in
some areas requiring a one time spring maintenance of this vegetation to increase sunlight for
planted shrubs
During Year One monitoring very few small resprouts of Kudzu were observed Monitoring
and control of these resprouts will continue as needed Multiflora Rose (Rosa multiflora) Privet
(Ligustrum sinense) and English Ivy (Hedera helix) are three other invasive species that were
observed in small numbers in the stream buffer upstream of the restoration reach During Year

One monitoring, these plants were not observed to be a dominant component of the vegetation
' and are not currently considered to be problematic These invasive plants will also be monitored
for future control efforts as needed
' 2 3 Evaluation of Restoration Success — Year One (2011 -2012)
Based on our site observations (channel morphology and buffer vegetation) and recorded hydrology
data it is our opinion that the restored stream is functioning as intended The stream appears stable
planted trees and shrubs in the stream buffer are large and have shown vigorous growth and very high
survival and herbaceous ground cover is dense
Specific interpretation of recorded hydrology in the substrate adjacent to the stream at this time would
be premature However it is not evident from general site observation and hydrology data that water is
being lost and it appears that the upstream sill and impervious geomembrane are functioning as
intended A continued comparison of channel adjacent hydrology over time will help to identify any
trends Based on collected data to date, the restoration effort has shown success during monitoring
Year One
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I Appendix A — Monitoring Task Schedule

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Appendix E — Comparative Site Photos

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