STREAM & WETLAND RESTORATION PLAN Little Beaver Creek ...
STREAM & WETLAND RESTORATION PLAN Little Beaver Creek Wake County, North Carolina
N.C. Wetlands Restoration Program NCDENR-DWQ
March 2003
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~ L / C PINTERNATIONAL LTD. COMPANY
710 Corporate Center Drive, Suite 475 Raleigh, North Carolina 27607
Stream Mitigation Plan Little Beaver Creek Wake Countv, NC
.
TABLE OF CONTENTS 1.0 INTRODUCTION ........................................................................................................ 1 1.2 GOALS AND OBJECTZVES .....................................................................................1 1.3 STREAM SURVEY METHODOLOGY ......................................................................... 4 1.4 BANKFULLVERIFICATION...................................................................................... 4 1. 5 WETLAND AND NATURAL COMMUNITIES EVALUATION ...................................... 5 2.0 EXISTING CONDITIONS.......................................................................................... 7 2.1 WATERSHED .........................................................................................................7 2.1.1 General Description of the Watershed .....................................................7
3.0
4.0
5.0
7.0
2.1.2 Surface Waters Classification ....................................................................9 2.1.3 Soils of the Watershed............................................................................... 9 2.1.4 Land Use of the Watershed...................................................................... 10 2.2 RESTORATION SITE.............................................................................................. 12 2.2.1 Site Description ...................................................................................... 12 2.2.2 Existing Stream Characteristics ...............................................................12 2.2.3 Soils of the Restoration Site ....................... . ......................................13 2.2.4 Terrestrial Plant Communities .............................................................13 2.2.5 Hydrology ................................................................................................17 2.2.6 Wildlife Observations and Protected Species ..........................................18 REFERENCE REACHES AND WETLANDS.......................................................... 19 3.1 RICHLAND CREEK ...............................................................................................19 3.2 LITTUBEAVERCREEK ........................................................................................21 3.3 LITIZEBEAVER CREEK REFERENCE WETLAND ...................................................21 STREAM & WETLAND RESTORATION DESIGN ..............................................-23 4.1 RESTORATION TECHNIQUES................................................................................. 25 4.1.1 Dimension................................................................................................ 25 4.1.2 Pattern .................................................................................................. 27 4.1.3 Bedform ...............................................................................................27 4.1.4 Structures ...............................................................................................2 7 4.1.5 Wetlands .................................................................................................. 27 ....................................................................................... 4.1.6 Riparian Buffers 33 4.2 SEDIMENT TRANSPORT ...................................................................................3 3 4.3 FLOODING ANALYSIS ......................................................................................... 3 4 4.4 HABITATRESTORATION......................................................................................3 5 4.4.1 Site Preparation ..................................................................................... 36 4.4.2 Streambank Vegetation ........................................................................... 37 4.4.3 Riparian Buffer ........................................................................................ 38 4.4.4 Wetlands ..................................................................................................38 4.4.5 Habitat Enhancements .............................................................................39MONITORING AND SUCCESS CRITERIA ...........................................................40 5.1 REFERENCE PHOTOGRAPHS..................................................................................40 5.2 CKANNEL STABILITY ......................................................................................40 5.3 PLANT SURVIVAL.................................................................................................41 5.4 GAUGE MONITORING..................................................................................... 4 1 REFERENCES........................................................................................................... -43
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. ?Stream Mirigation Plan Lirtle Beaver Creek. Wake County. NC A :
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TABLES Table 1. Table 2.
Species Under Federal Protection in Wake County ..................................18 Morphological Characteristics .................................................................. 24
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FIGURES Figure I Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure 7 Figure 8 Figure 9 Figure 10 Figure 1 1A Figure 11B Figure 1 1C Figure 1 ID Figure 12
Location Map ............................................................................................ 2 Vicinity Map .............................................................................................. 3 North Carolina Regional Curve .................................................................. 6 Little Beaver Creek Watershed .................................................................. 8 Aerial Photograph of Watershed ................................... ....................... 1 1 Soils ...................................................................................................... 14 Existing Conditions .................................................................................. 15 Richland Creek .........................................................................................20 Little Beaver Creek and Wetland ........................................................22 Proposed Stream Restoration Plan ........................................................ 26 Proposed Little Beaver Creek Cross-Sections-Reach 1 ...........................28 Proposed Little Beaver Creek Cross-Sections-Reach 2 ........................... 29 Proposed Little Beaver Creek Cross-Sections-Reach 3 ........................... 30 Proposed Little Beaver Creek Cross-Sections-Tributaries....................... 31 Proposed Profile ................................................................................ 3 2
APPENDICES Appendix A Photo Log Appendix B Existing Conditions Data - (AppendixC Hydrographs Appendix D Reference Reach Data Appendix E HEC-RAS Model Output
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N.C. Wetlands Restoration Program NCDENR-DWQ
March 2003
E
A
R A
T
a H
T
E
~ L / C PINTERNATIONAL LTD. COMPANY
710 Corporate Center Drive, Suite 475 Raleigh, North Carolina 27607
Stream Mitigation Plan Little Beaver Creek Wake Countv, NC
.
TABLE OF CONTENTS 1.0 INTRODUCTION ........................................................................................................ 1 1.2 GOALS AND OBJECTZVES .....................................................................................1 1.3 STREAM SURVEY METHODOLOGY ......................................................................... 4 1.4 BANKFULLVERIFICATION...................................................................................... 4 1. 5 WETLAND AND NATURAL COMMUNITIES EVALUATION ...................................... 5 2.0 EXISTING CONDITIONS.......................................................................................... 7 2.1 WATERSHED .........................................................................................................7 2.1.1 General Description of the Watershed .....................................................7
3.0
4.0
5.0
7.0
2.1.2 Surface Waters Classification ....................................................................9 2.1.3 Soils of the Watershed............................................................................... 9 2.1.4 Land Use of the Watershed...................................................................... 10 2.2 RESTORATION SITE.............................................................................................. 12 2.2.1 Site Description ...................................................................................... 12 2.2.2 Existing Stream Characteristics ...............................................................12 2.2.3 Soils of the Restoration Site ....................... . ......................................13 2.2.4 Terrestrial Plant Communities .............................................................13 2.2.5 Hydrology ................................................................................................17 2.2.6 Wildlife Observations and Protected Species ..........................................18 REFERENCE REACHES AND WETLANDS.......................................................... 19 3.1 RICHLAND CREEK ...............................................................................................19 3.2 LITTUBEAVERCREEK ........................................................................................21 3.3 LITIZEBEAVER CREEK REFERENCE WETLAND ...................................................21 STREAM & WETLAND RESTORATION DESIGN ..............................................-23 4.1 RESTORATION TECHNIQUES................................................................................. 25 4.1.1 Dimension................................................................................................ 25 4.1.2 Pattern .................................................................................................. 27 4.1.3 Bedform ...............................................................................................27 4.1.4 Structures ...............................................................................................2 7 4.1.5 Wetlands .................................................................................................. 27 ....................................................................................... 4.1.6 Riparian Buffers 33 4.2 SEDIMENT TRANSPORT ...................................................................................3 3 4.3 FLOODING ANALYSIS ......................................................................................... 3 4 4.4 HABITATRESTORATION......................................................................................3 5 4.4.1 Site Preparation ..................................................................................... 36 4.4.2 Streambank Vegetation ........................................................................... 37 4.4.3 Riparian Buffer ........................................................................................ 38 4.4.4 Wetlands ..................................................................................................38 4.4.5 Habitat Enhancements .............................................................................39MONITORING AND SUCCESS CRITERIA ...........................................................40 5.1 REFERENCE PHOTOGRAPHS..................................................................................40 5.2 CKANNEL STABILITY ......................................................................................40 5.3 PLANT SURVIVAL.................................................................................................41 5.4 GAUGE MONITORING..................................................................................... 4 1 REFERENCES........................................................................................................... -43
March 2003 i
I
,
.. .
:
. ?Stream Mirigation Plan Lirtle Beaver Creek. Wake County. NC A :
-
f ('$4
--y
.-
&I,
TABLES Table 1. Table 2.
Species Under Federal Protection in Wake County ..................................18 Morphological Characteristics .................................................................. 24
. - ;L
FIGURES Figure I Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure 7 Figure 8 Figure 9 Figure 10 Figure 1 1A Figure 11B Figure 1 1C Figure 1 ID Figure 12
Location Map ............................................................................................ 2 Vicinity Map .............................................................................................. 3 North Carolina Regional Curve .................................................................. 6 Little Beaver Creek Watershed .................................................................. 8 Aerial Photograph of Watershed ................................... ....................... 1 1 Soils ...................................................................................................... 14 Existing Conditions .................................................................................. 15 Richland Creek .........................................................................................20 Little Beaver Creek and Wetland ........................................................22 Proposed Stream Restoration Plan ........................................................ 26 Proposed Little Beaver Creek Cross-Sections-Reach 1 ...........................28 Proposed Little Beaver Creek Cross-Sections-Reach 2 ........................... 29 Proposed Little Beaver Creek Cross-Sections-Reach 3 ........................... 30 Proposed Little Beaver Creek Cross-Sections-Tributaries....................... 31 Proposed Profile ................................................................................ 3 2
APPENDICES Appendix A Photo Log Appendix B Existing Conditions Data - (AppendixC Hydrographs Appendix D Reference Reach Data Appendix E HEC-RAS Model Output
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