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ANNUAL REPORT FOR 2012 UT to Muddy Creek Mitigation Site Randolph County TIP No. R-2606WM COE Action ID: SAW-2004-00340 DWQ #: 2006-0331 Prepared By: Natural Environment Section & Roadside Environmental Unit North Carolina Department of Transportation November 2012 TABLE OF CONTENTS SUMMARY ........................................................................................................... 1 1.0 INTRODUCTION: ...................................................................................... 2 1.1 Project Description ......................................................................... 2 1.2 Purpose ........................................................................................ 2 1.3 Project History ............................................................................... 2 1.4 Debit Ledger ................................................................................... 2 2.0 STREAM ASSESSMENT: ......................................................................... 4 2.1 Success Criteria .............................................................................. 4 2.2 Stream Description ......................................................................... 4 2.2.1 Stream Description .................................................... 4 2.2.2 Stream Description .................................................... 4 2.3 Results of Stream Assessment ....................................................... 6 2.3.1 Site Data .................................................................... 6 2.4 Results of Stream and Buffer Vegetation ........................................ 7 2.4.1 Description of Species ............................................... 7 2.4.2 Results of Vegetation Monitoring ............................... 7 2.4.3 Conclusions ............................................................... 8 3.0 OVERALL CONCLUSIONS AND RECOMMENDATIONS ........................ 8 4.0 REFERENCES .......................................................................................... 8 LIST OF FIGURES Figure 1 – Vicinity Map ........................................................................................ 3 TABLES Table 1 – Abbreviated Morphological Summary .................................................. 5 Table 2 – Vegetation Monitoring Results ............................................................. 7 APPENDICES Appendix A – Cross Section Comparisons & Longitudinal Profile Appendix B – Site Photographs, Cross Section, Vegetation Plot & Photo Point Locations 1 SUMMARY The following report summarizes the stream monitoring activities that have occurred during 2012 at the UT to Muddy Creek Mitigation Site in Randolph County. The site was completed construction in November 2010 and planted in March 2011 by the North Carolina Department of Transportation (NCDOT). This report provides the monitoring results for the second formal year of monitoring (Year 2012). The Year 2012 monitoring period is the second of five scheduled years for monitoring on UT to Muddy Creek Mitigation Site (See Success Criteria Section 2.1). Based on the overall conclusions of monitoring along the UT to Muddy Creek, the site has met the required monitoring protocols for the second formal year of monitoring. Based on comparing the monitoring data to the as-built data, the channel is stable throughout the stream at this time. The streambank and buffer areas are vegetated for the second year of monitoring. NCDOT will continue stream monitoring at the UT to Muddy Creek Mitigation Site for 2013. 2 1.0 INTRODUCTION 1.1 Project Description The following report summarizes the stream monitoring activities that have occurred during 2012 at the UT to Muddy Creek Mitigation Site. The site is located approximately 8 miles southeast of High Point. It is adjacent to US-311 Bypass (R-2606) and just south of Cedar Square Road and north of Spencer Road (Figure 1). The UT to Muddy Creek Mitigation Site was constructed to provide mitigation for stream impacts associated with Transportation Improvement Program (TIP) number R-2606 in Randolph County. The mitigation project covers approximately 1,380 linear feet of stream restoration. Construction was completed in November 2010 and planted in March 2011 by NCDOT. Stream restoration involved the installation of rock cross vanes, rock a-vanes and rock vanes, construction of a new stream channel and construction of the floodplain to allow for overbank flooding. It also included the installation of coir fiber matting and live stakes along the streambank and bareroot seedlings in the buffer area. 1.2 Purpose In order for a mitigation site to be considered successful, the site must meet the success criteria. This report details the monitoring in 2012 at the UT to Muddy Creek Mitigation Site. Hydrologic monitoring was not required for the site. 1.3 Project History November 2010 Construction Completed March 2011 Planted Live Stakes and Bareroot Seedlings July 2011 Vegetation Monitoring (Year 1) October 2011 September 2012 Stream Monitoring (Year 1) Vegetation Monitoring (Year 2) October 2012 Stream Monitoring (Year 2) 1.4 Debit Ledger The entire UT to Muddy Creek stream mitigation site was used for the R-2606 project to compensate for unavoidable stream impacts. 3 Figure 1. Vicinity Map 4 2.0 STREAM ASSESSMENT 2.1 Success Criteria In accordance with the approved mitigation plan, NCDOT will evaluate the success of the stream restoration project based on guidance provided by the Stream Mitigation Guidelines disseminated by the United States Army Corps of Engineers-Wilmington District. The survey of channel dimension will consist of permanent cross sections placed at approximately seven cross sections (four riffles and three pools). Annual photographs showing both banks and upstream and downstream views will be taken from permanent, mapped photo points. The survey of the longitudinal profile will represent distinct areas of the stream and will cover a cumulative total of 1,370 linear feet of channel (Main Channel: 1,275 lf. and Tributary: 95 lf). The entire restored length of stream will be investigated for channel stability and in-stream structure functionality. Any evidence of channel instability will be identified, mapped and photographed. Vegetation Success The success of vegetation plantings will be measured through stem counts. Permanent quadrants will be used to sample the riparian buffer. Survival of the live stakes will be determined by visual observation throughout the 5 year monitoring period. Bareroot vegetation will be evaluated using 4 staked survival plots. Plots will be 50 ft. by 50 ft. and all flagged stems will be counted in those plots. Success will be defined as 320 stems per acre after 5 years. All vegetation monitoring will be conducted during the growing season. 2.2 Stream Description 2.2.1 Post-Construction Conditions The mitigation project covers approximately 1,380 linear feet of stream restoration. Construction was completed in November 2010 and planted in March 2011 by NCDOT. Stream restoration involved the installation of rock cross vanes, rock a-vane, and rock vanes, construction of a new stream channel and construction of the floodplain to allow for overbank flooding. It also included the installation of coir fiber matting and live stakes along the streambank and bareroot seedlings in the buffer area. 2.2.2 Monitoring Conditions The objective of the UT to Muddy Creek Mitigation Site was to restore a C5 stream type as identified in the Rosgen’s Applied River Morphology. A total of seven cross sections (four in a riffle, three in a pool) were surveyed. For this report, Table 1 only included cross sections containing riffles in the comparison of channel morphology. 5 Table 1. Abbreviated Morphological Summary (UT to Muddy Creek Cross Sections #1, #3, #4, & #6) Variable As-Built Cross Section #1 (Riffle) Main Channel Cross Section #3 (Riffle) Main Channel Cross Section #4 (Riffle) Tributary Cross Section #6 (Riffle) Main Channel Min. - Max Values (Riffle Sections Only) 2012 2012 2012 2012 2012 Drainage Area (sq. mi) 0.4 0.4 0.4 0.4 0.4 0.4 Bankfull Width (ft.) 11.3 12.75 14.76 7.39 13.79 7.39 – 14.76 Bankfull Mean Depth (ft.) 0.7 0.94 0.77 0.47 0.67 0.47 – 0.94 Width/Depth Ratio 16.1 13.56 19.17 15.72 20.58 13.56 – 20.58 Bankfull Cross Sectional Area (ft 2 ) 8.0 11.93 11.38 3.48 9.21 3.48 – 11.93 Maximum Bankfull Depth (ft.) 1.0 1.82 1.73 0.84 1.1 0.84 – 1.82 Floodprone Area (ft.) 24.9 - 30.5 34.21 47 23.11 39.49 23.11 - 47 Entrenchment Ratio 2.2 – 2.7 2.68 3.18 3.13 2.86 2.68 – 3.18 *Drainage Area, Floodprone Width, and Slope are averaged values only. *Riffle values are used for classification purposes. 6 2.3 Results of the Stream Assessment 2.3.1 Site Data The assessment included the survey of seven cross sections and the longitudinal profile of UT to Muddy Creek established by the NCDOT after construction. The length of the profile along Muddy Creek Mitigation Site was approximately 1,370 linear feet (Main Channel: 1275 lf. and Tributary: 95 lf). Seven cross sections were established during the as-built survey. Cross section locations were subsequently based on the stationing of the longitudinal profile and are presented below. The locations of the cross sections and longitudinal profile are shown in Appendix A. ¨ Cross Section #1. UT Muddy Creek, Station 166+00 linear feet, midpoint of riffle ¨ Cross Section #2. UT Muddy Creek, Station 297+00 linear feet, midpoint of pool ¨ Cross Section #3. UT Muddy Creek, Station 371+00 linear feet, midpoint of riffle ¨ Cross Section #4. UT Muddy Creek, Station 19+00 linear feet, midpoint of riffle (tributary) ¨ Cross Section #5. UT Muddy Creek, Station 713+00 linear feet, midpoint of pool ¨ Cross Section #6. UT Muddy Creek, Station 957+00 linear feet, midpoint of riffle ¨ Cross Section #7. UT Muddy Creek, Station 1160+00 linear feet, midpoint of pool Based on comparisons of the monitoring data to the as-built data, all seven cross sections appear stable with little or no active bank erosion. Graphs of the cross sections are presented in Appendix A. Future survey data will vary depending on actual location of rod placement and alignment; however this information should remain similar in appearance. The longitudinal profile showed that there is a slight headcut at Sta. 75+00 and water was piping under a crossvane at Sta. 88+00. Some minor bank scouring was noted on the left bank just downstream of Cross Section #5. A bankfull event has occurred since the last monitoring evaluation in 2011. 7 2.4 Results of Stream and Buffer Vegetation 2.4.1 Description of Species The following live stake species were planted on the streambank: Cephalanthus occidentalis, Buttonbush Cornus amomum, Silky Dogwood The following tree species were planted in the buffer area: Platanus occidentalis, Sycamore Quercus lyrata, Overcup Oak Betula Nigra, River Birch Liriodendron Tulipifera, Tulip Poplar 2.4.2 Results of Vegetation Monitoring Table 2. Vegetation Monitoring Results: Four 50 ft. x 50 ft. vegetation plots were set to determine the trees per acre in the buffer area. Plot # Sycamore Overcup Oak River Birch Tulip Poplar Total (Year 2) Total (at planting) Density (Trees/Acre) 1 2 0 6 2 7 3 5 3 8 6 2 6 2 1 2 2 7 2 1 2 1 6 8 0 3 1 9 7 7 6 3 9 4 2 6 3 1 4 1 8 6 6 2 3 2 4 4 4 9 5 6 0 8 A v e ra g e D e n s ity (T re e s /A c re ) Site Notes: The buttonbush and silky dogwood live stakes are surviving along the streambank. Other vegetation noted included, horse-nettle, sweetgum, fennel, briars, goldenrod, Juncus sp., tear-thumb, baccharis, black willow, pokeberry, cattail, sumac, winged elm, and various grasses. 8 2.4.3 Conclusions There were four vegetation monitoring plots established throughout the buffer area. The 2012 vegetation monitoring of the site revealed an average tree density of 608 trees per acre. This average is above the minimum success criteria of 320 trees per acre after year two monitoring. 3.0 OVERALL CONCLUSIONS/RECOMMENDATIONS The UT to Muddy Creek Mitigation Site has met the required monitoring protocols for the second formal year of monitoring. The channel and structures throughout the stream are stable at this time. The streambank and buffer area are vegetated for the second year of monitoring. NCDOT will continue stream monitoring at the UT to Muddy Creek Mitigation Site for 2013. 4.0 REFERENCES Stream and Wetland Mitigation Plan for UT to Muddy Creek (CF-16 Site) Randolph County, NC, August 2006 Rosgen, D.L, 1996. Applied River Morphology. Wildland Hydrology, Pagosa Springs, Colorado. US Army Corps of Engineers (USACE), 2003. Stream Mitigation Guidelines. Prepared with cooperation from the US Environmental Protection Agency, NC Wildlife Resources Commission, and the NC Division of Water Quality. APPENDIX A CROSS SECTION COMPARISONS & LONGTITUDINAL PROFILE Cross-Section #1 (Riffle) Abbreviated Morphological Summary 2011 2012 2013 2014 2015 Bankfull Width (ft.) 12.71 12.75 Bankfull Mean Depth (ft.) 0.85 0.94 Width/Depth Ratio 14.95 13.56 Bankfull Cross Sectional Area (ft2) 10.84 11.93 Maximum Bankfull Depth (ft.) 1.63 1.82 Width of the Floodprone Area (ft.) 32.59 34.21 Entrenchment Ratio 2.56 2.68 Cross-Section #2 (Pool) Abbreviated Morphological Summary* 2011 2012 2013 2014 2015 Bankfull Cross Sectional Area (ft2) 17.95 12.52 Maximum Bankfull Depth (ft.) 2.39 1.98 Bankfull Mean Depth (ft.) 1.38 1.15 Bankfull Width (ft.) 13 10.93 * According to the Rosgen Classification of Natural Rivers floodprone width, entrenchment ratio, and width depth ratio are not measured in pool, glide, or run features. Cross-Section #3 (Riffle) Abbreviated Morphological Summary 2011 2012 2013 2014 2015 Bankfull Width (ft.) 14.94 14.76 Bankfull Mean Depth (ft.) 0.75 0.77 Width/Depth Ratio 19.92 19.17 Bankfull Cross Sectional Area (ft2) 11.18 11.38 Maximum Bankfull Depth (ft.) 1.53 1.73 Width of the Floodprone Area (ft.) 45.62 47 Entrenchment Ratio 3.05 3.18 Cross-Section #4 (Riffle) Abbreviated Morphological Summary 2011 2012 2013 2014 2015 Bankfull Width (ft.) 8.95 7.39 Bankfull Mean Depth (ft.) 0.61 0.47 Width/Depth Ratio 14.67 15.72 Bankfull Cross Sectional Area (ft2) 5.42 3.48 Maximum Bankfull Depth (ft.) 1.22 0.84 Width of the Floodprone Area (ft.) 24.84 23.11 Entrenchment Ratio 3.05 3.13 Cross-Section #5 (Pool) Abbreviated Morphological Summary* 2011 2012 2013 2014 2015 Bankfull Cross Sectional Area (ft2) 26.83 27.78 Maximum Bankfull Depth (ft.) 2.65 3.19 Bankfull Mean Depth (ft.) 1.5 1.55 Bankfull Width (ft.) 17.9 17.87 * According to the Rosgen Classification of Natural Rivers floodprone width, entrenchment ratio, and width depth ratio are not measured in pool, glide, or run features. Cross-Section #6 (Riffle) Abbreviated Morphological Summary 2011 2012 2013 2014 2015 Bankfull Width (ft.) 15 13.79 Bankfull Mean Depth (ft.) 0.71 0.67 Width/Depth Ratio 21.13 20.58 Bankfull Cross Sectional Area (ft2) 10.72 9.21 Maximum Bankfull Depth (ft.) 1.33 1.1 Width of the Floodprone Area (ft.) 40.86 39.49 Entrenchment Ratio 2.72 2.86 Cross-Section #7(Pool) Abbreviated Morphological Summary* 2011 2012 2013 2014 2015 Bankfull Cross Sectional Area (ft2) 16.32 15.44 Maximum Bankfull Depth (ft.) 1.85 1.92 Bankfull Mean Depth (ft.) 1.59 1.5 Bankfull Width (ft.) 10.3 10.3 * According to the Rosgen Classification of Natural Rivers floodprone width, entrenchment ratio, and width depth ratio are not measured in pool, glide, or run features. APPENDIX B SITE PHOTOGRAPHS, CROSS SECTION, VEGETATION PLOT & PHOTO POINT LOCATIONS Cross Section #3 at Station 4+95.6 Cross Section #7 at Station 17+75.6 UT to Muddy Creek Photo Point #1 (Upstream) 10-23-12 Photo Point #1 (Downstream) 10-23-12 Photo Point #2 (Upstream) 10-23-12 Photo Point #2 (Downstream) 10-23-12 Photo Point #3 (Upstream) 10-23-12 Photo Point #3 (Downstream) 10-23-12 UT to Muddy Creek Photo Point #4 (Upstream @ Tributary) 10-23-12 Photo Point #4 (Downstream @ Tributary) 10-23-12 Photo Point #5 (Upstream) 10-23-12 Photo Point #5 (Downstream) 10-23-12 Photo Point #6 (Upstream) 10-23-12 Photo Point #6 (Downstream) 10-23-12 UT to Muddy Creek Photo Point #7 (Upstream) 10-23-12 Photo Point #7 (Downstream) 10-23-12 Overview (Upstream) 9-13-12 Overview (Downstream) 9-13-12 Overview (Upstream) 9-13-12 Overview (Downstream) 9-13-12 UT to Muddy Creek Bank scouring on left bank just downstream of XS#5 10-23-12
Object Description
Description
Title | Annual report for... UT to Muddy Creek mitigation site, Randolph County, TIP no. R-2606WM |
Other Title | UT to Muddy Creek mitigation site, Randolph County |
Date | 2012-11 |
Description | 2012 |
Digital Characteristics-A | 2.19 MB; 26 p. |
Digital Format |
application/pdf |
Related Items | http://worldcat.org/oclc/863992463/viewonline |
Pres File Name-M | pubs_serial_utmuddycreek2012.pdf |
Full Text | ANNUAL REPORT FOR 2012 UT to Muddy Creek Mitigation Site Randolph County TIP No. R-2606WM COE Action ID: SAW-2004-00340 DWQ #: 2006-0331 Prepared By: Natural Environment Section & Roadside Environmental Unit North Carolina Department of Transportation November 2012 TABLE OF CONTENTS SUMMARY ........................................................................................................... 1 1.0 INTRODUCTION: ...................................................................................... 2 1.1 Project Description ......................................................................... 2 1.2 Purpose ........................................................................................ 2 1.3 Project History ............................................................................... 2 1.4 Debit Ledger ................................................................................... 2 2.0 STREAM ASSESSMENT: ......................................................................... 4 2.1 Success Criteria .............................................................................. 4 2.2 Stream Description ......................................................................... 4 2.2.1 Stream Description .................................................... 4 2.2.2 Stream Description .................................................... 4 2.3 Results of Stream Assessment ....................................................... 6 2.3.1 Site Data .................................................................... 6 2.4 Results of Stream and Buffer Vegetation ........................................ 7 2.4.1 Description of Species ............................................... 7 2.4.2 Results of Vegetation Monitoring ............................... 7 2.4.3 Conclusions ............................................................... 8 3.0 OVERALL CONCLUSIONS AND RECOMMENDATIONS ........................ 8 4.0 REFERENCES .......................................................................................... 8 LIST OF FIGURES Figure 1 – Vicinity Map ........................................................................................ 3 TABLES Table 1 – Abbreviated Morphological Summary .................................................. 5 Table 2 – Vegetation Monitoring Results ............................................................. 7 APPENDICES Appendix A – Cross Section Comparisons & Longitudinal Profile Appendix B – Site Photographs, Cross Section, Vegetation Plot & Photo Point Locations 1 SUMMARY The following report summarizes the stream monitoring activities that have occurred during 2012 at the UT to Muddy Creek Mitigation Site in Randolph County. The site was completed construction in November 2010 and planted in March 2011 by the North Carolina Department of Transportation (NCDOT). This report provides the monitoring results for the second formal year of monitoring (Year 2012). The Year 2012 monitoring period is the second of five scheduled years for monitoring on UT to Muddy Creek Mitigation Site (See Success Criteria Section 2.1). Based on the overall conclusions of monitoring along the UT to Muddy Creek, the site has met the required monitoring protocols for the second formal year of monitoring. Based on comparing the monitoring data to the as-built data, the channel is stable throughout the stream at this time. The streambank and buffer areas are vegetated for the second year of monitoring. NCDOT will continue stream monitoring at the UT to Muddy Creek Mitigation Site for 2013. 2 1.0 INTRODUCTION 1.1 Project Description The following report summarizes the stream monitoring activities that have occurred during 2012 at the UT to Muddy Creek Mitigation Site. The site is located approximately 8 miles southeast of High Point. It is adjacent to US-311 Bypass (R-2606) and just south of Cedar Square Road and north of Spencer Road (Figure 1). The UT to Muddy Creek Mitigation Site was constructed to provide mitigation for stream impacts associated with Transportation Improvement Program (TIP) number R-2606 in Randolph County. The mitigation project covers approximately 1,380 linear feet of stream restoration. Construction was completed in November 2010 and planted in March 2011 by NCDOT. Stream restoration involved the installation of rock cross vanes, rock a-vanes and rock vanes, construction of a new stream channel and construction of the floodplain to allow for overbank flooding. It also included the installation of coir fiber matting and live stakes along the streambank and bareroot seedlings in the buffer area. 1.2 Purpose In order for a mitigation site to be considered successful, the site must meet the success criteria. This report details the monitoring in 2012 at the UT to Muddy Creek Mitigation Site. Hydrologic monitoring was not required for the site. 1.3 Project History November 2010 Construction Completed March 2011 Planted Live Stakes and Bareroot Seedlings July 2011 Vegetation Monitoring (Year 1) October 2011 September 2012 Stream Monitoring (Year 1) Vegetation Monitoring (Year 2) October 2012 Stream Monitoring (Year 2) 1.4 Debit Ledger The entire UT to Muddy Creek stream mitigation site was used for the R-2606 project to compensate for unavoidable stream impacts. 3 Figure 1. Vicinity Map 4 2.0 STREAM ASSESSMENT 2.1 Success Criteria In accordance with the approved mitigation plan, NCDOT will evaluate the success of the stream restoration project based on guidance provided by the Stream Mitigation Guidelines disseminated by the United States Army Corps of Engineers-Wilmington District. The survey of channel dimension will consist of permanent cross sections placed at approximately seven cross sections (four riffles and three pools). Annual photographs showing both banks and upstream and downstream views will be taken from permanent, mapped photo points. The survey of the longitudinal profile will represent distinct areas of the stream and will cover a cumulative total of 1,370 linear feet of channel (Main Channel: 1,275 lf. and Tributary: 95 lf). The entire restored length of stream will be investigated for channel stability and in-stream structure functionality. Any evidence of channel instability will be identified, mapped and photographed. Vegetation Success The success of vegetation plantings will be measured through stem counts. Permanent quadrants will be used to sample the riparian buffer. Survival of the live stakes will be determined by visual observation throughout the 5 year monitoring period. Bareroot vegetation will be evaluated using 4 staked survival plots. Plots will be 50 ft. by 50 ft. and all flagged stems will be counted in those plots. Success will be defined as 320 stems per acre after 5 years. All vegetation monitoring will be conducted during the growing season. 2.2 Stream Description 2.2.1 Post-Construction Conditions The mitigation project covers approximately 1,380 linear feet of stream restoration. Construction was completed in November 2010 and planted in March 2011 by NCDOT. Stream restoration involved the installation of rock cross vanes, rock a-vane, and rock vanes, construction of a new stream channel and construction of the floodplain to allow for overbank flooding. It also included the installation of coir fiber matting and live stakes along the streambank and bareroot seedlings in the buffer area. 2.2.2 Monitoring Conditions The objective of the UT to Muddy Creek Mitigation Site was to restore a C5 stream type as identified in the Rosgen’s Applied River Morphology. A total of seven cross sections (four in a riffle, three in a pool) were surveyed. For this report, Table 1 only included cross sections containing riffles in the comparison of channel morphology. 5 Table 1. Abbreviated Morphological Summary (UT to Muddy Creek Cross Sections #1, #3, #4, & #6) Variable As-Built Cross Section #1 (Riffle) Main Channel Cross Section #3 (Riffle) Main Channel Cross Section #4 (Riffle) Tributary Cross Section #6 (Riffle) Main Channel Min. - Max Values (Riffle Sections Only) 2012 2012 2012 2012 2012 Drainage Area (sq. mi) 0.4 0.4 0.4 0.4 0.4 0.4 Bankfull Width (ft.) 11.3 12.75 14.76 7.39 13.79 7.39 – 14.76 Bankfull Mean Depth (ft.) 0.7 0.94 0.77 0.47 0.67 0.47 – 0.94 Width/Depth Ratio 16.1 13.56 19.17 15.72 20.58 13.56 – 20.58 Bankfull Cross Sectional Area (ft 2 ) 8.0 11.93 11.38 3.48 9.21 3.48 – 11.93 Maximum Bankfull Depth (ft.) 1.0 1.82 1.73 0.84 1.1 0.84 – 1.82 Floodprone Area (ft.) 24.9 - 30.5 34.21 47 23.11 39.49 23.11 - 47 Entrenchment Ratio 2.2 – 2.7 2.68 3.18 3.13 2.86 2.68 – 3.18 *Drainage Area, Floodprone Width, and Slope are averaged values only. *Riffle values are used for classification purposes. 6 2.3 Results of the Stream Assessment 2.3.1 Site Data The assessment included the survey of seven cross sections and the longitudinal profile of UT to Muddy Creek established by the NCDOT after construction. The length of the profile along Muddy Creek Mitigation Site was approximately 1,370 linear feet (Main Channel: 1275 lf. and Tributary: 95 lf). Seven cross sections were established during the as-built survey. Cross section locations were subsequently based on the stationing of the longitudinal profile and are presented below. The locations of the cross sections and longitudinal profile are shown in Appendix A. ¨ Cross Section #1. UT Muddy Creek, Station 166+00 linear feet, midpoint of riffle ¨ Cross Section #2. UT Muddy Creek, Station 297+00 linear feet, midpoint of pool ¨ Cross Section #3. UT Muddy Creek, Station 371+00 linear feet, midpoint of riffle ¨ Cross Section #4. UT Muddy Creek, Station 19+00 linear feet, midpoint of riffle (tributary) ¨ Cross Section #5. UT Muddy Creek, Station 713+00 linear feet, midpoint of pool ¨ Cross Section #6. UT Muddy Creek, Station 957+00 linear feet, midpoint of riffle ¨ Cross Section #7. UT Muddy Creek, Station 1160+00 linear feet, midpoint of pool Based on comparisons of the monitoring data to the as-built data, all seven cross sections appear stable with little or no active bank erosion. Graphs of the cross sections are presented in Appendix A. Future survey data will vary depending on actual location of rod placement and alignment; however this information should remain similar in appearance. The longitudinal profile showed that there is a slight headcut at Sta. 75+00 and water was piping under a crossvane at Sta. 88+00. Some minor bank scouring was noted on the left bank just downstream of Cross Section #5. A bankfull event has occurred since the last monitoring evaluation in 2011. 7 2.4 Results of Stream and Buffer Vegetation 2.4.1 Description of Species The following live stake species were planted on the streambank: Cephalanthus occidentalis, Buttonbush Cornus amomum, Silky Dogwood The following tree species were planted in the buffer area: Platanus occidentalis, Sycamore Quercus lyrata, Overcup Oak Betula Nigra, River Birch Liriodendron Tulipifera, Tulip Poplar 2.4.2 Results of Vegetation Monitoring Table 2. Vegetation Monitoring Results: Four 50 ft. x 50 ft. vegetation plots were set to determine the trees per acre in the buffer area. Plot # Sycamore Overcup Oak River Birch Tulip Poplar Total (Year 2) Total (at planting) Density (Trees/Acre) 1 2 0 6 2 7 3 5 3 8 6 2 6 2 1 2 2 7 2 1 2 1 6 8 0 3 1 9 7 7 6 3 9 4 2 6 3 1 4 1 8 6 6 2 3 2 4 4 4 9 5 6 0 8 A v e ra g e D e n s ity (T re e s /A c re ) Site Notes: The buttonbush and silky dogwood live stakes are surviving along the streambank. Other vegetation noted included, horse-nettle, sweetgum, fennel, briars, goldenrod, Juncus sp., tear-thumb, baccharis, black willow, pokeberry, cattail, sumac, winged elm, and various grasses. 8 2.4.3 Conclusions There were four vegetation monitoring plots established throughout the buffer area. The 2012 vegetation monitoring of the site revealed an average tree density of 608 trees per acre. This average is above the minimum success criteria of 320 trees per acre after year two monitoring. 3.0 OVERALL CONCLUSIONS/RECOMMENDATIONS The UT to Muddy Creek Mitigation Site has met the required monitoring protocols for the second formal year of monitoring. The channel and structures throughout the stream are stable at this time. The streambank and buffer area are vegetated for the second year of monitoring. NCDOT will continue stream monitoring at the UT to Muddy Creek Mitigation Site for 2013. 4.0 REFERENCES Stream and Wetland Mitigation Plan for UT to Muddy Creek (CF-16 Site) Randolph County, NC, August 2006 Rosgen, D.L, 1996. Applied River Morphology. Wildland Hydrology, Pagosa Springs, Colorado. US Army Corps of Engineers (USACE), 2003. Stream Mitigation Guidelines. Prepared with cooperation from the US Environmental Protection Agency, NC Wildlife Resources Commission, and the NC Division of Water Quality. APPENDIX A CROSS SECTION COMPARISONS & LONGTITUDINAL PROFILE Cross-Section #1 (Riffle) Abbreviated Morphological Summary 2011 2012 2013 2014 2015 Bankfull Width (ft.) 12.71 12.75 Bankfull Mean Depth (ft.) 0.85 0.94 Width/Depth Ratio 14.95 13.56 Bankfull Cross Sectional Area (ft2) 10.84 11.93 Maximum Bankfull Depth (ft.) 1.63 1.82 Width of the Floodprone Area (ft.) 32.59 34.21 Entrenchment Ratio 2.56 2.68 Cross-Section #2 (Pool) Abbreviated Morphological Summary* 2011 2012 2013 2014 2015 Bankfull Cross Sectional Area (ft2) 17.95 12.52 Maximum Bankfull Depth (ft.) 2.39 1.98 Bankfull Mean Depth (ft.) 1.38 1.15 Bankfull Width (ft.) 13 10.93 * According to the Rosgen Classification of Natural Rivers floodprone width, entrenchment ratio, and width depth ratio are not measured in pool, glide, or run features. Cross-Section #3 (Riffle) Abbreviated Morphological Summary 2011 2012 2013 2014 2015 Bankfull Width (ft.) 14.94 14.76 Bankfull Mean Depth (ft.) 0.75 0.77 Width/Depth Ratio 19.92 19.17 Bankfull Cross Sectional Area (ft2) 11.18 11.38 Maximum Bankfull Depth (ft.) 1.53 1.73 Width of the Floodprone Area (ft.) 45.62 47 Entrenchment Ratio 3.05 3.18 Cross-Section #4 (Riffle) Abbreviated Morphological Summary 2011 2012 2013 2014 2015 Bankfull Width (ft.) 8.95 7.39 Bankfull Mean Depth (ft.) 0.61 0.47 Width/Depth Ratio 14.67 15.72 Bankfull Cross Sectional Area (ft2) 5.42 3.48 Maximum Bankfull Depth (ft.) 1.22 0.84 Width of the Floodprone Area (ft.) 24.84 23.11 Entrenchment Ratio 3.05 3.13 Cross-Section #5 (Pool) Abbreviated Morphological Summary* 2011 2012 2013 2014 2015 Bankfull Cross Sectional Area (ft2) 26.83 27.78 Maximum Bankfull Depth (ft.) 2.65 3.19 Bankfull Mean Depth (ft.) 1.5 1.55 Bankfull Width (ft.) 17.9 17.87 * According to the Rosgen Classification of Natural Rivers floodprone width, entrenchment ratio, and width depth ratio are not measured in pool, glide, or run features. Cross-Section #6 (Riffle) Abbreviated Morphological Summary 2011 2012 2013 2014 2015 Bankfull Width (ft.) 15 13.79 Bankfull Mean Depth (ft.) 0.71 0.67 Width/Depth Ratio 21.13 20.58 Bankfull Cross Sectional Area (ft2) 10.72 9.21 Maximum Bankfull Depth (ft.) 1.33 1.1 Width of the Floodprone Area (ft.) 40.86 39.49 Entrenchment Ratio 2.72 2.86 Cross-Section #7(Pool) Abbreviated Morphological Summary* 2011 2012 2013 2014 2015 Bankfull Cross Sectional Area (ft2) 16.32 15.44 Maximum Bankfull Depth (ft.) 1.85 1.92 Bankfull Mean Depth (ft.) 1.59 1.5 Bankfull Width (ft.) 10.3 10.3 * According to the Rosgen Classification of Natural Rivers floodprone width, entrenchment ratio, and width depth ratio are not measured in pool, glide, or run features. APPENDIX B SITE PHOTOGRAPHS, CROSS SECTION, VEGETATION PLOT & PHOTO POINT LOCATIONS Cross Section #3 at Station 4+95.6 Cross Section #7 at Station 17+75.6 UT to Muddy Creek Photo Point #1 (Upstream) 10-23-12 Photo Point #1 (Downstream) 10-23-12 Photo Point #2 (Upstream) 10-23-12 Photo Point #2 (Downstream) 10-23-12 Photo Point #3 (Upstream) 10-23-12 Photo Point #3 (Downstream) 10-23-12 UT to Muddy Creek Photo Point #4 (Upstream @ Tributary) 10-23-12 Photo Point #4 (Downstream @ Tributary) 10-23-12 Photo Point #5 (Upstream) 10-23-12 Photo Point #5 (Downstream) 10-23-12 Photo Point #6 (Upstream) 10-23-12 Photo Point #6 (Downstream) 10-23-12 UT to Muddy Creek Photo Point #7 (Upstream) 10-23-12 Photo Point #7 (Downstream) 10-23-12 Overview (Upstream) 9-13-12 Overview (Downstream) 9-13-12 Overview (Upstream) 9-13-12 Overview (Downstream) 9-13-12 UT to Muddy Creek Bank scouring on left bank just downstream of XS#5 10-23-12 |
OCLC number | 863992463 |