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HomeMy WebLinkAbout20081011 Ver 1_Year 1 Monitoring Report_20090928K- �0 I YEAR 1 (2009) ANNUAL MONITORING REPORT COLUMBUS SWAMP WETLAND RESTORATION SITE ROBESON /COLUMBUS COUNTIES, NORTH CAROLINA (Contract 000619) FULL DELIVERY PROJECT TO PROVIDE RIPARIAN WETLAND MITIGATION IN THE LUMBER RIVER BASIN CATALOGING UNIT 03040203 Prepared for: NORTH CAROLINA DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES RALEIGH, NORTH CAROLINA Prepared by: And IlUiil� iZEOUICE $ Axiom Environmental, Inc. Resiornlion 3:Cot�sel� �tlion Restoration Systems, LLC Axiom Environmental, Inc. 1101 Haynes Street, Suite 211 20 Enterprise Street, Suite 7 Raleigh, North Carolina 27604 Raleigh, North Carolina 27607 September 2009 Fp 2 9 MFNT RFC �ItM EXECUTIVE SUMMARY Restoration Systems, L.L.C. has completed restoration of riparian wetlands at the Columbus Swamp Wetland Restoration Site (hereafter referred to as the "Site ") to assist the North Carolina Ecosystem Enhancement Program in fulfilling wetland mitigation goals. The Site, located approximately 11 miles southeast of Lumberton (34.4597 °N, 78.9002 °W NAD 83/WGS84), on the Robeson and Columbus County line, provides 32 riparian wetland mitigation units as outlined in the April 2007 Technical Proposal and calculated as stipulated in RFP #16- 1307033. The Site is located in United States Geological Survey (USGS) Hydrologic Unit 03040203170020 (North Carolina Division of Water Quality Subbasin 03- 07 -53) of the Lumber River Basin. This report serves as the Year 1 (2009) annual monitoring report. Primary activities at the Site included 1) wetland restoration, 2) wetland enhancement, 3) soil scarification, and 4) plant community restoration. Project restoration efforts will provide a minimum of 32 riparian Wetland Mitigation Units. Ten vegetation plots (10 meters by 10 meters in size) were established and permanently monumented. These plots were surveyed in early September 2009 for the Year 1 (2009) monitoring season. Based on the number of stems present, the average density of all plots was 664 planted stems per acre surviving in Year 1 (2009). The dominant species identified at the Site were planted stems of bald cypress (Taxodium distichum) and water oak (Quercus nigra). One of the ten vegetation plots (Plot 3) contained no planted stems due to extreme wetness in that portion of the Site. Supplemental planting in approximately four acres around this plot will occur in early 2010 with species tolerant of long periods of soil saturation and/or surface inundation. No other vegetation problem areas were noted during the Year 1 (2009) monitoring season. Seven Restoration Site and one reference groundwater monitoring gauges were operated for the Year 1 (2009) monitoring season. All monitored gauges within restoration areas were inundate&saturated within 12 inches of the surface for greater than 10 percent (ranging from 15.7 -44.6 percent) of the growing season. No wetland problem areas were noted during Year 1 (2009) monitoring. In summary, the Restoration Site achieved success criteria for vegetation and hydrology attributes in the First Monitoring Year (2009). Annual Monitoring Report Executive Summary Columbus Swamp Wetland Restoration Site TABLE OF CONTENTS EXECUTIVESUMMARY ........................................................................................ ..............................i 1.0 PROJECT BACKGROUND .......................................................................... ..............................1 1.1 Location and Setting ................................................................................. ............................... 1 1.2 Project Objectives ..................................................................................... ............................... 1 1.3 Project Structure, Restoration Type, and Approach .................................... ............................... 1 1.4 Project History and Background ................................................................. ..............................2 2.0 PROJECT CONDITION AND MONITORING RESULTS .......................... ............................... 3 2.1 Vegetation Assessment ............................................................................... ..............................3 2.1.1 Vegetation Success Criteria ............................................................... ............................... 4 2.1.2 Vegetative Problem Areas .................................................................. ..............................4 2.2 Wetland Assessment .................................................................................. ..............................4 2.2.1 Wetland Success Criteria .................................................................... ..............................6 2.2.2 Wetland Problem Areas ...................................................................... ..............................6 2.2.3 ' Wetland Criteria Attainment ............................................................... ..............................6 3.0 CONCLUSIONS ........................................................................................... ..............................7 4.0 REFERENCES ............................................................................................. ............................... 8 FIGURES Figure1. Site Location ........................................................................... ............................... Appendix A Figure 2. Monitoring Plan ....................................................................... ............................... Appendix A TABLES Table 1. Site Restoration Structures and Objectives .................................................. ..............................2 Table 2. Project Activity and Reporting History ....................................................... ............................... 2 Table3. Project Contacts .......................................................................................... ..............................3 Table4. Project Background ..................................................................................... ..............................3 Table 5. Characteristic Tree Species ........................................................................ ............................... 4 Table 6. Wetland Criteria Attainment for Year 1 ( 2009) ........................................... ............................... 6 Table 7. Summary of Groundwater Gauge Results ................................................... ............................... 7 Table 8. Summary of Planted Vegetation Plot Results ............................................... ..............................7 Annual Monitoring Report page i Columbus Swamp Wetland Restoration Site APPENDICES APPENDIX A. FIGURES 1. Site Location 2. Monitoring Plan APPENDIX B. VEGETATION DATA 1. Vegetation Survey Data Tables 2. Vegetation Monitoring Plot Photos APPENDIX C. HYDROLOGY DATA 2009 Groundwater Gauge Data Annual Monitoring Report page Columbus Swamp Wetland Restoration Site 1.0 PROJECT BACKGROUND 1.1 Location and Setting Restoration Systems, L.L.C. (Restoration Systems) has completed restoration of riparian wetlands at the Columbus Swamp Wetland Restoration Site (hereafter referred to as the "Site ") to assist the North Carolina Ecosystem Enhancement Program (NCEEP) in fulfilling wetland mitigation goals. The Site, located approximately 11 miles southeast of Lumberton (34.4597 °N, 78.9002 °W NAD 83/WGS84), on the .Robeson and Columbus County line, provides 32 riparian wetland mitigation units as outlined in the April 2007 Technical Proposal and calculated as stipulated in RFP #16- 1307033 (Figure 1, Appendix A). The Site is located in United States Geological Survey (USGS) Hydrologic Unit 03040203170020 (North Carolina Division of Water Quality Subbasin 03- 07 -53) of the Lumber River Basin. Directions to the Site: ➢ From Raleigh, take I -40 east to 1 -95 south ➢ Take exit 14 from I -95 and travel east on US -74 ➢ Take the first left on Old Boardman Road ➢ After approximately 2.5 miles, turn left on Paul Willoughby Road ➢ Travel approximately 0.5 mile, the Site is on the left ➢ Latitude, Longitude of Site: 34.4597 °N, 78.9002 °W (NAD83 /WGS84) 1.2 Project Objectives The primary components of the restoration project included 1) enhancement of water quality functions within, upstream, and downstream of the Site; 2) restoration/enhancement of jurisdictional riparian wetlands in the Site; 3) reforestation of the Site with native vegetation; 4) improvement of aquatic habitat and species diversity by removing nonpoint and point sources of pollution; and 5) restoration of wildlife functions associated with a riparian wetland system. 1.3 Project Structure, Restoration Type, and Approach An approximately 40 -acre conservation easement was placed on the Site to incorporate all restoration activities. The Site is situated at the outer floodplain edge of Big Swamp at the confluence of Big Swamp and a smaller tributary, Brier Creek. Big Swamp serves as the primary hydrologic feature at the Site. The Big Swamp floodplain is approximately three quarters of a mile in width, extending to timber tracts on the northern rim of the drainage feature. Prior to construction, an extensive ditch system had been excavated to drain the Site for agricultural land uses. Interfield ditches had been excavated to a depth of approximately 4 to 5 feet and resulting spoil was used to construct a berm/road that bordered Site agricultural fields. The berm hindered surface water from Big Swamp from accessing agricultural fields during wetter periods of the year. Restoration of Site wetlands will result in positive benefits for water quality and biological diversity in the watershed. Targeted mitigation efforts, which focused on improving water quality, enhancing flood attenuation, restoring aquatic and riparian habitat, and improving biological diversity in the Lumber River watershed were accomplished by: 1. Removing nonpoint and point sources of pollution associated with agricultural practices including a) cessation of broadcasting fertilizer, pesticides, and other agricultural chemicals into and adjacent to the Site and b) provide a forested riparian buffer to treat surface runoff. 2. Restoring Site hydrology by filling approximately 8000 linear feet of existing drainage ditches, thereby promoting flood storage, nutrient cycling, and aquatic wildlife habitat. Annual Monitoring Report page 1 Columbus Swamp Wetland Restoration Site 3. Restoring soil structure through appropriate soil modifications and physical alteration (grading, ripping, etc.). 4. Reforesting a native wetland community, thereby reestablishing habitat diversity and functional continuity. 5. Enhancing and protecting the Site's full potential of wetland functions and values in perpetuity. 6. Providing a terrestrial wildlife corridor and refuge in an area segmented for agricultural production. As constructed, the Site restored historic wetland functions, which existed onsite prior to ditching, agricultural impacts, and vegetation removal. The Site restoration design mimicked a nearby reference wetland. Site construction resulted in 33.5 acres of riparian wetland restoration and 2.5 acres of riparian wetland enhancement (Table 1). Table 1. Site Restoration Structures and Objectives Restoration Segment/ Reach ID Station Range Mitigation Type Priority Approach Existing Linear Footage/ Acreage Designed Linear Footage/ Acreage Comment NA December 2008 Site Planting NA January 2009 Mitigation Plan/As- builts Filling agricultural ditches, February 2009 Year 1 (2009) Monitoring November 2009 September 2009 removing a berm and spoil Restoration -- -- 33.5 castings, eliminating row Riparian/ crop production, rehydrating Riverine floodplain soils, and planting Wetlands with native forest vegetation. Eliminating row crop -- Enhancement -- 2.5 2.5 production and planting with native forest vegetation. 1.4 Project History and Background Completed project activities, reporting history, completion dates, project contacts, and background information are summarized in Tables 2 -4. Table 2. Project Activity and Reporting History Activity or Report Data Collection Corn letion Actual Completion or Delivery Restoration Plan April 2008 April 2008 Construction Completion NA December 2008 Site Planting NA January 2009 Mitigation Plan/As- builts February 2009 February 2009 Year 1 (2009) Monitoring November 2009 September 2009 Annual Monitoring Report page 2 Columbus Swamp Wetland Restoration Site Table 3. Project Contacts Full Delivery Provider Restoration Systems Drainage impervious cover estimate ( %) 1101 Haynes Street, Suite 211 Physiogra hic Region Raleigh, North Carolina 27604 Ecoregion George Howard and John Preyer (919) 755 -9490 Designer and Year 1 Monitoring Axiom Environmental, Inc. Performer 20 Enterprise Street, Suite 7 USGS HUC Raleigh, North Carolina 27607 NCDWQ Subbasin Grant Lewis (919) 215 -1693 Construction Contractor Land Mechanics Designs, Inc. Any portion of any project segment 303d listed? 126 Circle G Lane Any portion of any project segment upstream of a 303d listed segment? Willow Spring, North Carolina 27592 Reasons for 303d listing or stressor Lloyd Glover (919) 422 -3392 Planting Contractor Carolina Silvics 908 Indian Trail Road Edenton, North Carolina 27932 Dwight McKinney (252) 482 -8491 Table 4. Project Background Project County Columbus /Robeson County, North Carolina Drainage impervious cover estimate ( %) < 1 Physiogra hic Region Coastal Plain Ecoregion Southeastern Plains Dominant Soil Types Johnston Reference Site ID Big Swamp USGS HUC 03040203170020 NCDWQ Subbasin 03 -07 -53 NCDWQ Classification C Sw (Stream Index # 14- 22 -17) Any portion of any project segment 303d listed? No Any portion of any project segment upstream of a 303d listed segment? No Reasons for 303d listing or stressor Not Applicable % of project easement fenced 0% 1.5 Monitoring Plan View Monitoring activities for the Site, including relevant structures and utilities, project features, specific project structures, and monitoring features are detailed in the monitoring plan (Figure 2, Appendix A). Site features including vegetation, wetland hydrology, and photographic documentation were monitored in Year 1 (2009). 2.0 PROJECT CONDITION AND MONITORING RESULTS 2.1 Vegetation Assessment Following Site construction, ten plots (10 meters by 10 meters in size) were established and monumented with metal fence posts at all plot corners and PVC at each plot origin. Sampling was conducted as outlined in the CVS -EEP Protocol for Recording Vegetation, Version 4.0 (Lee et al. 2006) ( http: / /cvs.bio.unc.edu/methods.htm); results are included in Appendix B. The taxonomic standard for Annual Monitoring Report page 3 Columbus Swamp Wetland Restoration Site vegetation used for this document was Flora of the Carolinas, Virginia, Georgia, and Surrounding Areas (Weakley 2007). The locations of vegetation monitoring plots were placed to accurately represent the entire Site and are depicted on the monitoring plan (Figure 2, Appendix A). 2.1.1 Vegetation Success Criteria Success criteria have been established to verify that the vegetation component supports community elements necessary for forest development. Success criteria are dependent upon the density and growth of characteristic forest species. Additional success criteria are dependent upon density and growth of "Characteristic Tree Species." Characteristic Tree Species include planted species, species identified through inventory of a reference (relatively undisturbed) forest community used to orient the planting plan, and appropriate Schafale and Weakley (1990) community descriptions. All species planted and identified in the reference forest will be utilized to define "Characteristic Tree Species" as termed in the success criteria (Table 5). Table 5. Characteristic Tree Species Planted Species Reference Species River birch ( Betula nigra) Red maple (Acer rubrum) Ironwood (Carpinus caroliniana) American holly (Ilex opaca) Atlantic white cedar (Chamaecyparis thyoides) Sweetbay magnolia (Magnolia virginiana) Laurel oak (Quercus laurifolia) Swamp blackgum (Nyssa biflora) Overcup oak (Quercus lyrata) Red bay (Persea borbonia) Swamp chestnut oak (Quercus michauxii) Laurel oak (Quercus laurifolia) Water oak (Quercus nigra) Swamp chestnut oak (Quercus michauxii) Willow oak (Quercus phellos) Willow oak (Quercus phellos) Shumard oak (Quercus shumardii) Bald cypress ( Taxodium distichum) Bald cypress ( Taxodium distichum) An average density of 320 stems per acre of Characteristic Tree Species must be surviving at the end of the third monitoring year. Subsequently, 290 Characteristic Tree Species per acre must be surviving at the end of Year 4 and 260 Characteristic Tree Species per acre at the end of Year 5. 2.1.2 Vegetative Problem Areas Vegetation sampling across the Site was above the required average density with an overall average of 664 planted stems per acre. One of the ten vegetation plots (Plot 3) contained no planted stems due to extreme wetness in that portion of the Site. Groundwater Gauge 3, immediately adjacent to this plot, indicated the longest hydroperiod (108 consecutive days or 44.6% of the growing season) of all gauges on the site. Ground observations indicated that there is an area of about four acres around this plot with heavy stands of obligate wetland plants and evidence of standing water. Supplemental planting in this area will be made in early 2010 with species tolerant of long periods of soil saturation or surface inundation (Nyssa biflora, Taxodium distichum, and Betula nigra). 2.2 Wetland Assessment Annual Monitoring Report page 4 Columbus Swamp Wetland Restoration Site Seven Restoration Site and one reference groundwater monitoring gauges were maintained and monitored throughout the Year 1 (2009) growing season. Graphs of groundwater hydrology and precipitation from a nearby rain station are included in Appendix C. Annual Monitoring Report page 5 Columbus Swamp Wetland Restoration Site 2.2.1 Wetland Success Criteria Target hydrological characteristics include a minimum regulatory wetland hydrology criteria based upon reference groundwater modeling. Evaluation of success criteria will also be supplemented by sampling and data comparison between restoration areas and the reference wetland site. Hydrology success criteria for the five -year monitoring period will include a minimum regulatory criterion, comprising saturation (free water) within one foot of the soil surface for 10 percent of the growing season. Wetland hydroperiods measured by a groundwater gauge located within the reference area will be compared to the hydroperiods exhibited by groundwater gauges in the restoration area to further evaluate restoration success. Success criteria outlined by the groundwater model indicates that the wetland restoration area should maintain saturation within one foot of the soil surface for at least 75 percent of the hydroperiod exhibited by the reference wetland gauges in any given year. 2.2.2 Wetland Problem Areas No wetland problem areas were identified within the Site during Year 1 (2009) monitoring. 2.2.3 Wetland Criteria Attainment All monitored gauges within restoration areas were inundated/saturated within 12 inches of the surface for greater than 5 percent (ranging from 15.7 -44.6 percent) of the growing season (Table 6). Hydrographs containing groundwater and precipitation data for each gauge can be found in Appendix C. Table 6. Wetland Criteria Attainment for Year 1 (2009) Gauge ID Hydrology Threshold Met? Hydrophytic Vegetation Criteria Met? Site Mean Vegetation Plot ID Vegetation Survival Threshold Met? Site Mean 1 Yes Yes 100% 1 Yes 90% 2 Yes Yes 2 Yes 3 Yes Yes 3 No 4 Yes Yes 4 Yes 5 Yes Yes 5 Yes 6 Yes Yes 6 Yes 7 Yes Yes 7 Yes 8 Yes 9 Yes 10 Yes Annual Monitoring Report page 6 Columbus Swamp Wetland Restoration Site 3.0 CONCLUSIONS The Site achieved the defined (or targeted) success criteria, with saturation (free water) within one foot of the soil surface for a minimum of 10 percent of the growing season, for all Site groundwater gauges in the First Monitoring Year (Year 2009). A summary of groundwater gauge data for the Year 1 (2009) is included in Table 7. Also, vegetation plots across the Site were above the required 320 stems per acre with an average of 664 planted tree stems per acre in the First Monitoring Year (Year 2009) (Table 8). One of the ten vegetation plots contained no planted stems; supplemental planting within this area is will occur in early 2010. Table 7. Summary of Groundwater Gauge Results Gauge Success Criteria Achieved /Max Consecutive Days During Growing Season ( %) Year 1 (2009)_ Year 2 2010 Year 3 2011 Year 4 2012 Year 5 2013 1 769 Year 1 2009 Year 2 2010 Year 3 2011 Year 4 2012 Year 5 2013 1 Yes /47 days 3 0 (19.4 percent) . ". 4 2 Yes /54 days 5 769 (22.3 percent) 6 3 Yes /108 days 7 809 (44.6 percent) 8 4 Yes /39 days 9 647 (16.1 percent) 10 5 Yes /38 days Average 10 Plots 664 (15.7 percent) 6 Yes /100 days (41.3 percent) Yes /45 days 7 (18.6 percent) Ref 1 Yes /47 days (19.4 percent) .' Table 8. Summary of Planted Vegetation Plot Results Plot Planted Stems /Acre Counting Towards Success Criteria Year 1 (2009)_ Year 2 2010 Year 3 2011 Year 4 2012 Year 5 2013 1 769 2 728 3 0 ". 4 647 5 769 6 890 7 809 8 971 9 647 10 405 Average 10 Plots 664 Annual Monitoring Report page 7 Columbus Swamp Wetland Restoration Site 4.0 REFERENCES Environmental Laboratory. 1987. Corps of Engineers Wetlands Delineation Manual. Technical Report Y -87 -1. United States Army Engineer Waterways Experiment Station, Vicksburg, Mississippi. Lee, Michael T., R.K. Peet, S.D. Roberts, and T.R. Wentworth. 2006. CVS -EEP Protocol for Recording Vegetation, Version 4.0. (online). Available: httD:Hcvs.bio.unc.edu/methods.htm Schafale, M. P. and A.S. Weakley. 1990. Classification of the Natural Communities of North Carolina: Third Approximation, NC Natural Heritage Program, Division of Parks and Recreation, NC DEM, Raleigh NC. Weakley, Alan S. 2007. Flora of the Carolinas, Virginia, Georgia, and Surrounding Areas (online). Available: http: / /www. herbarium .unc.edu /WeakleysFIora.pdf [February 1, 2008]. University of North Carolina Herbarium, North Carolina Botanical Garden, University of North Carolina, Chapel Hill, North Carolina. Weather Underground. 2009. Station in Lumberton, North Carolina. (online). Available: http: / /www.wunderground.com/ history /airport/KLBT /2009 /9 /8/Dail, Hy istory.html ?recd [September 8, 2009]. Weather Underground. Annual Monitoring Report page 8 Columbus Swamp Wetland Restoration Site APPENDIX A FIGURES 1. Site Location 2. Monitoring Plan Annual Monitoring Report Appendices Columbus Swamp Wetland Restoration Site Lumberton 211 4. k. {j Bladenboro 7 � y 1 ` �r.7'`•`' b''" . Si. I d 2� ���, +! =�\\ `y � - (•� �� �..w y -� ter' - 131 242 Site Location yv 34.45970N, 78.9002 °W 410 ,/NAD83/WGS84 x-11 .x�?' - i=- •\ // �, - 4° o,/ � `` �� ( „n _ _ - �.�'�c,l��i9._ boa • . «.•.:f'D z4 2a2 - .4-Ma�jon a 0. Rd. Q mi 41 c 2a2 lone,, .4 From Raleigh Take I -40 E to I -95 S Take Exit 14 From 1 -95, go East on US -74 =i Take First Left on Old Boardman Road After 2.5 Miles, Left on Paul Wiloughby Road After 0.5 Mile, Site is on Left f ; 0 1 ml. 4 mi. 242 r w 6 1:158,400 r ti un, Source: 1977 North Carolina Atlas and Gazetteer, pp.81 & 82. ._�_ — a Dwn. by: CLF 20 Enterprise Street SITE LOCATION Ckd by: FIGURE Suite 7 Raleigh, NC 27607 COLUMBUS SWAMP WETLAND wCL A (919) 215-1693 RESTORATION SITE Date: January 2009 I L 11 Robeson /Columbus Counties, North Carolina I I PfOJect' 08 -003 Dwn. By: FIGURE 20 Enterprise Street MONITORING PLAN WGL SWCe7 igh, NC 27607 COLUMBUS SWAMP WETLAND Date: Rale January 2009 (919) 215 -1693 RESTORATION SITE Columbus /Robeson Counties, North Carolina Project: 08 -003 APPENDIX B VEGETATION DATA 1. Vegetation Survey Data Tables 2. 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