Large-Scale Channel Erosion Testing (ASTM D 6460) (Modified procedure used for vegetated channel tests)

Large-Scale Channel Erosion Testing (ASTM D 6460) (Modified procedure used for vegetated channel tests) of East Coast Erosion Blanket ECP-3 Permanent Turf Reinforcement Mats over Loam December 2011 Submitted to: AASHTO/NTPEP 444 North Capitol Street, NW, Suite 249 Washington, D.C. 20001 Attn: Evan Rothblatt, NTPEP erothblatt@aashto.org Submitted by: TRI/Environmental, Inc. 9063 Bee Caves Road Austin, TX 78733 C. Joel Sprague Project Manager

December 12, 2011 Mr. Evan Rothblatt AASHTO/NTPEP 444 North Capitol Street, NW, Suite 249 Washington, D.C. 20001 E-mail: erothblatt@aashto.org Subject: Channel Testing over Loam of East Coast Erosion Blanket s ECP-3, Triple Net Polymer Fiber Matting manufactured in Bernville, PA. Dear Mr. Rothblatt: This letter report presents the results for large-scale channel erosion tests performed on ECP-3, Triple Net Polymer Fiber Matting, over Loam. Included are data developed for target hydraulic shears ranging from 0.5 to 3+ psf (0.02 to 0.14+ kpa) for the unvegetated condition and from 1 to 13+ psf (0.04 to 0.62+ kpa) for the vegetated condition. All testing work was performed in general accordance with the ASTM D 6460, Standard Test Method for Determination of Rolled Erosion Control Product (RECP) Performance in Protecting Earthen Channels from Stormwater-Induced Erosion. The procedure was modified to use only single replicates when testing vegetated channels. Generated results were used to develop the following permissible or limiting shear (τ limit ) and limiting velocity (V limit ) for the tested material: ECP-3, Triple Net Polymer Fiber Matting & 4.5 staples/sy Product Unvegetated 6+ Week Vegetated 1+ Year Vegetated Condition Condition Condition Actual growth period, wks 0 7 62 τ limit 3.3 6.4* 12.3* V limit 12.1 17.5* 25.0* * = ASTM D 6460 requires that three test replicates be performed using identical procedures to obtain an average threshold of performance. Thus, the results of vegetated testing, being single replicates of each condition, cannot be considered as an average threshold of performance. TRI is pleased to present this final report. Please feel free to call if we can answer any questions or provide any additional information. Sincerely, C. Joel Sprague, P.E. Senior Engineer Geosynthetics Services Division cc: Sam Allen, Jarrett Nelson - TRI

ECP-3, Triple Net Polymer Fiber Matting, over Loam Channel Erosion Testing December 12, 2011 Page 3 CHANNEL TESTING REPORT ECP-3, Triple Net Polymer Fiber Matting, over Loam TESTING EQUIPMENT AND PROCEDURES Overview of Test and Apparatus TRI/Environmental, Inc.'s (TRI's) large-scale channel erosion testing facility is located at the Denver Downs Research Farm in Anderson, SC. Testing oversight is provided by C. Joel Sprague, P.E. The large-scale testing is performed in a rectangular flume having a 10% slope (unvegetated condition) or 20% slope (vegetated condition) using a loamy soil test section. The concentrated flow is produced by raising gates to allow gravity flow from an adjacent pond. At least four sequential, increasing flows are applied to each test section for 30 minutes (unvegetated condition) or 1 hour (vegetated condition) each to achieve a range of hydraulic shear stresses in order to define the permissible, or limiting, shear stress, τ limit, which is the shear stress necessary to cause an average of 0.5 inch of soil loss over the entire channel bottom. Testing is performed in accordance with ASTM D 6460, though the procedure was modified to use only single replicates when testing vegetated channels. Tables and graphs of shear versus soil loss are generated from the accumulated data. Rolled Erosion Control Product (RECP) The following information and index properties were determined from the supplied product. Table 1. Tested Product Information & Index Properties Product Information and Index Property / Test Units Sampled Product Product Identification - ECP-3 Manufacturer - East Coast Erosion Blanket Manufacturing Plant Location - Bernville, PA Lot number of sample - 10114091A Fiber - Polypropylene Netting Openings in 0.5 x 0.5 (approx) Stitching Spacing in 1.5 (approx) Tensile Strength MD x XD (ASTM D 6818) lb/in 104 x 116 Tensile Elongation MD x XD (ASTM D 6818) % 33 x 19 Thickness (ASTM D 6525) mils 345 Light Penetration (ASTM D 6567) % cover 83.8 Specific Gravity (ASTM D 792, Method A) Net Only g/cm 3 0.914 Mass / Unit Area (ASTM D 6475) oz/sy 18.37 Test Soil The test soil used in the test plots had the following characteristics.

ECP-3, Triple Net Polymer Fiber Matting, over Loam Channel Erosion Testing December 12, 2011 Page 4 Table 2. TRI-Loam Characteristics Soil Characteristic Test Method Value % Gravel 0 % Sand 45 ASTM D 422 % Silt 35 % Clay 20 Liquid Limit, % 41 ASTM D 4318 Plasticity Index, % 8 Soil Classification USDA Loam Soil Classification USCS Sandy silty clay (ML-CL) Preparation of the Test Channels The initial channel soil veneer (12-inch thick minimum) is placed and compacted. Compaction is verified to be 90% (± 3%) of Proctor Standard density using ASTM D 698 (sand cone method). The test channels undergo a standard preparation procedure prior to each test. First, any rills or depressions resulting from previous testing are filled in with test soil. The soil surface is replaced to a depth of 1 inch and groomed to create a channel bottom that is level side-to-side and at a smooth slope top-to-bottom. Finally, a vibrating plate compactor is run over the renewed channel surface. If a vegetated condition is to be tested, grass seed (tall fescue) is applied to the plot at the rate of 500 seeds per square foot. The submitted erosion control product is then installed using the anchors and anchorage pattern directed by the client. Installation of Erosion Control Product in Test Channel As noted, the submitted erosion control product is installed as directed by the client. For the tests reported herein, the erosion control product was anchored using a diamond anchorage pattern consisting of 2 x 8 steel staples to create an anchorage density of approximately 4.5 anchors per square yard. Specific Test Procedure Immediately prior to testing, the initial soil surface elevation readings are made at predetermined cross-sections. The channel is then exposed to sequential 30-minute (unvegetated condition) or 1-hour (vegetated condition) flows having target hydraulic shear stresses selected to create at least three flow events below and one flow event above the shear stress level that results in a cummulative average soil loss of ½-inch. During the testing, flow depth and corresponding flow measurements are taken at the predetermined cross-section locations. Between flow events, the flow is stopped and soil surface elevation measurements are made to facilitate calculation of soil loss. The flow is then restarted at the next desired flow (shear) level. Pictures of channel flows and resulting soil loss are shown in Figures 6 thru 12.

ECP-3, Triple Net Polymer Fiber Matting, over Loam Channel Erosion Testing December 12, 2011 Page 5 Figure 1. Typical 10% (Unvegetated Shear) Flumes on Left; 20% Flumes on Right Figure 4. Unvegetated RECP Figure 2. 6+ Week Vegetated Shear in 20% Flumes; Recirculation Pump in Background Figure 5. 6+ Week Vegetated RECP Figure 3. Typical 20% Temporary Flume Set Up 1+ Year Vegetated Shear Plots Figure 6. 1+ Year Vegetated RECP

ECP-3, Triple Net Polymer Fiber Matting, over Loam Channel Erosion Testing December 12, 2011 Page 6 Figure 7. Typical Flow in Unvegetated Channel Figure 10. Unvegetated Channel after Test with RECP Removed (typical) Figure 8. Typical Flow in 6+ Week Vegetated Channel Figure 11. 6+ Week Vegetated Channel after Test (typical) Figure 9. Typical Flow in 1+ Year Vegetated Channel Figure 12. 1+ Year Vegetated Channel after Test (typical)

ECP-3, Triple Net Polymer Fiber Matting, over Loam Channel Erosion Testing December 12, 2011 Page 7 TEST RESULTS Average soil loss and the associated hydraulic shear calculated from flow and depth measurements made during the testing are the principle data used to determine the performance of the product tested. This data is entered into a spreadsheet that transforms the flow depth and velocity into an hydraulic shear stress and the soil loss measurements into an average Clopper Soil Loss Index (CSLI). Measured and calculated data is summarized in Table 3. A graph of shear versus soil loss for the protected condition is shown in Figure 13. The associated velocities and time of vegetation growth are plotted in Figures 14 and 15, respectively. The graphs include the best regression line fit to the test data to facilitate a determination of the limiting shear stress, τ limit,, and limiting velocity, V limit,. The 0.5-inch intercept values are provided in Table 4. Test # (Channel # - Shear Level) Table 3. Summary Data Table Protected Test Reach Actual Growth Period (wks) Flow depth (in) Flow velocity (fps) Flow (cfs) Manning s roughness, n Max Bed Shear Cumm. CSLI (in) C1-S1, Unvegetated 1.52 3.78 0.97 0.032 0.79 0.09 C1-S2, Unvegetated 3.37 7.39 4.15 0.027 1.75 0.20 C1-S3, Unvegetated 0 4.79 9.90 7.89 0.026 2.48 0.30 C1-S4, Unvegetated 6.60 12.85 14.11 0.025 3.43 0.42 C1-S5, Unvegetated 9.37 16.36 25.57 0.024 4.87 0.84 C2-S1, Unvegetated 1.30 2.90 0.62 0.037 0.67 0.04 C2-S2, Unvegetated 2.26 5.26 1.98 0.029 1.17 0.13 C2-S3, Unvegetated 0 3.95 8.27 5.44 0.027 2.05 0.27 C2-S4, Unvegetated 5.36 10.26 9.17 0.027 2.78 0.41 C2-S5, Unvegetated 7.16 12.82 15.29 0.026 3.72 0.65 C3-S1, Unvegetated 1.17 2.83 0.55 0.035 0.61 0.07 C3-S2, Unvegetated 2.17 5.13 1.86 0.030 1.13 0.18 C3-S3, Unvegetated 0 3.94 8.15 5.34 0.028 2.05 0.31 C3-S4, Unvegetated 4.82 9.60 7.71 0.027 2.50 0.40 C3-S5, Unvegetated 6.05 11.65 11.72 0.026 3.14 0.51 S1, 6+ Wk Vegetated 0.85 3.57 0.51 0.032 0.88 0.05 S2, 6+ Wk Vegetated 1.92 6.95 2.22 0.028 1.99 0.11 7 S3, 6+ Wk Vegetated 4.03 12.62 8.47 0.025 4.16 0.26 S4, 6+ Wk Vegetated 6.20 17.50 18.06 0.024 6.40 0.50 S1, 1+ Yr Vegetated 1.85 5.63 1.72 0.034 1.91 0.05 S2, 1+ Yr Vegetated 4.51 11.90 8.89 0.029 4.66 0.13 S3, 1+ Yr Vegetated 62 7.88 19.49 25.53 0.026 8.14 0.26 S4, 1+ Yr Vegetated 10.60 22.94 40.46 0.027 10.95 0.38 S5, 1+ Yr Vegetated 12.35 25.49 52.42 0.027 12.76 0.54 Table 4. ECP-3, Triple Net Polymer Fiber Matting & 4.5 staples/sy Product Unvegetated 6+ Week Vegetated 1+ Year Vegetated Condition Condition Condition Actual growth period, wks 0 7 62 τ limit 3.3 6.4* 12.3* V limit 12.1 17.5* 25.0* * = ASTM D 6460 requires that three test replicates be performed using identical procedures to obtain an average threshold of performance. Thus, the results of vegetated testing, being single replicates of each condition, cannot be considered as an average threshold of performance.

Cummulative Soil Loss (CSLI), in Cummulative Soil Loss (CSLI), in 0.9 0.8 y = 0.0141x 2 + 0.105x R² = 0.9593 Limiting Shear via ASTM D 6460 ECP-3; 4.5 Anchors/SY y = 0.0062x 2 + 0.0385x R² = 0.9972 ECP-3, Triple Net Polymer Fiber Matting, over Loam Channel Erosion Testing December 12, 2011 Page 8 Unvegetated Run #1 Unvegetated Run #2 Unvegetated Run #3 All Unvegetated Runs With 7 Weeks of Vegetation With 62 Weeks of Vegetation Poly. (All Unvegetated Runs) Poly. (With 7 Weeks of Vegetation) Poly. (With 62 Weeks of Vegetation) 1 Limiting Shear = 3.3 psf Limiting Shear = 6.4 psf y = 0.0002x 3-0.0023x 2 + 0.0341x R² = 0.9954 Limiting Shear = 12.3 psf 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0 0.0 1.0 2.0 3.0 4.0 5.0 6.0 7.0 8.0 9.0 10.0 11.0 12.0 13.0 14.0 15.0 16.0 Shear, psf Figure 13. Shear Stress vs. Soil Loss Tested Product 0.9 0.8 y = 0.0118x 1.5033 R² = 0.9506 Limiting Velocity via ASTM D 6460 ECP-3; 4.5 Anchors/SY Unvegetated Run #1 Unvegetated Run #2 Unvegetated Run #3 All Runs With 7 Weeks of Vegetation With 62 Weeks of Vegetation Power (All Runs) Poly. (With 7 Weeks of Vegetation) Poly. (With 62 Weeks of Vegetation) 1 Limiting Velocity = 12.1 ft/sec y = 8E-05x 3-0.0007x 2 + 0.0159x R² = 1 Limiting Velocity = 17.5 ft/sec y = 6E-05x 3-0.0012x 2 + 0.0167x R² = 0.9927 Limiting Velocity = 25 ft/sec 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0 0 2 4 6 8 10 12 14 16 18 20 22 24 26 Velocity, ft/sec Figure 14. Velocity vs. Soil Loss Tested Product

Manning's n Permissible Shear, psf 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 Vegetation Loss vs Time of Vegetation Growth via ASTM D 6460 ECP-3; 4.5 Anchors/SY SUMMARY OF TEST RESULTS ECP-3, Triple Net Polymer Fiber Matting, over Loam Channel Erosion Testing December 12, 2011 Page 9 Weeks of Vegetation Growth 0 7 62 Initial Vegetative Density (stems/ft 2 ) 0 273 481 Final Vegetative Density (stems/ft 2 ) 0 90 30 % of Initial Vegetation after Max. Shear (%) 0 33% 6% Permissible Shear 3.3 6.4 12.3 0 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 Time of Vegetation Growth, weeks Figure 15. Shear Stress vs. Time of Vegetation Growth Tested Product Manning's n vs. Water Depth ECP-3; 4.5 Anchors/SY Unvegetated Run #1 Unvegetated Run #2 Unvegetated Run #3 Al Unvegetated Runsl With 7 Weeks of Vegetation With 62 Weeks of Vegetation Power (Al Unvegetated Runsl) 0.055 0.05 0.045 0.04 0.035 0.03 y = 0.0355x -0.182 R² = 0.8943 0.025 0.02 0.015 0.01 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Water Depth, in Figure 16. Flow Depth vs. Manning s n Tested Product

Elevation Relative to Benchmark, ft Elevation Relative to Benchmark, ft ECP-3, Triple Net Polymer Fiber Matting, over Loam Channel Erosion Testing December 12, 2011 Page 10 202 Energy Grade Lines - All Shear Levels ECP-3 Unvegetated 201 200 199 198 197 196 Channel 1 Channel 2 Channel 3 195 Shear Level 5 194 y = -0.1027x + 201.6 y = -0.0797x + 199.99 y = -0.0668x + 199.28 Shear Level 4 193 y = -0.0595x + 199.39 y = -0.09x + 199.05 y = -0.0878x + 198.71 Shear Level 3 192 y = -0.0856x + 198.46 y = -0.0903x + 198.37 y = -0.0739x + 198.11 Shear Level 2 191 y = -0.087x + 197.69 y = -0.0955x + 197.66 y = -0.0877x + 197.49 Shear Level 1 190 y = -0.0925x + 196.98 y = -0.0944x + 197.28 y = -0.0962x + 197.21 0 2 4 6 8 10 12 14 16 18 20 X-Section (ft along test reach) Figure 17a. Energy Grade Lines All Channels, Unvegetated Shears Tested Product 208 207 206 205 204 203 202 201 200 199 198 197 196 195 194 193 192 191 190 189 Shear Level 5 Shear Level 4 Shear Level 3 Shear Level 2 Shear Level 1 7-Wk Vegetated Energy Grade Lines - All Shear Levels ECP-3 Vegetated Channels 62-Wk Vegetated y = -0.1125x + 207.32 y = -0.1796x + 201.94 y = -0.1177x + 205.33 y = -0.1755x + 199.46 y = -0.1298x + 202.96 y = -0.2035x + 197.85 y = -0.1503x + 199.2 y = -0.2031x + 197.21 y = -0.1893x + 197.66 0 2 4 6 8 10 12 14 16 18 20 X-Section (ft along test reach) Figure 17b. Energy Grade Lines All Channels, Vegetated Shears Tested Product

Cummulative Soil Loss (CSLI), in Percent of Initial Vegetation after Shear Stress, % Vegetation Loss vs Shear via ASTM D 6460 ECP-3; 4.5 Anchors/SY ECP-3, Triple Net Polymer Fiber Matting, over Loam Channel Erosion Testing December 12, 2011 Page 11 100.0% With 7 Weeks of Vegetation With 62 Weeks of Vegetation Poly. (With 7 Weeks of Vegetation) Poly. (With 62 Weeks of Vegetation) 90.0% 80.0% 70.0% Initial 7-Week Vegetative Stand = 273 stems/ft 2 y = -0.0009x 3-0.0042x 2-0.0406x + 1 R² = 0.9999 60.0% 50.0% 40.0% 30.0% 20.0% 10.0% Initial 62-week Vegetative Stand = 481 stems/ft 2 y = 1E-04x 3-0.0067x 2-0.0054x + 1 R² = 0.9879 0.0% 0.00 2.00 4.00 6.00 8.00 10.00 12.00 14.00 16.00 18.00 20.00 Shear, psf Figure 18. Vegetation vs. Shear Stress Tested Product 1.00 0.90 0.80 y = -7.4065x 3 + 22.361x 2 + 4.1214x R² = 0.9998 Limiting Shear via ASTM D 6460 Control Runs Unvegetated With 6 Weeks of Vegetation With 61 Weeks of Vegetation Poly. (Unvegetated) Power (With 6 Weeks of Vegetation) Poly. (With 61 Weeks of Vegetation) Limiting Shear = 0.075 y = 0.8879x 0.7093 R² = 0.9595 Limiting Shear = 0.5 psf y = 0.0005x 3 + 0.0014x 2 + 0.0185x R² = 0.9996 Limiting Shear = 8.0 psf 0.70 0.60 0.50 0.40 0.30 0.20 0.10 0.00 0.00 1.00 2.00 3.00 4.00 5.00 6.00 7.00 8.00 9.00 10.00 Shear, psf Figure 19. Shear Stress vs. Soil Loss Controls (Vegetation Only / No RECP)

ECP-3, Triple Net Polymer Fiber Matting, over Loam Channel Erosion Testing December 12, 2011 Page 12 Figure 20. Typical 6+ Week Control Vegetation-Only Before Testing Figure 22. Typical 1+ Year Control Vegetation-Only Before Testing Figure 21. Typical 6+ Week Control Vegetation-Only After Testing 5 Figure 23. Typical 1+ Year Control Vegetation-Only After Testing CONCLUSIONS Rectangular channel (flume) tests were performed in accordance with ASTM D 6460 using Loam soil protected with an RECP. Three replicates of the unvegetated condition and one replicate each of the 6+ week and 1+ year vegetated conditions were performed. Testing in a rectangular (vertical wall) channel was conducted to achieve increasing shear levels in an attempt to cause at least 0.5-inch of soil loss. Figure 13 shows the maximum bottom shear stress and associated soil loss from each flow event. Figure 14 presents the velocity versus soil loss. Figure 15 relates the permissible shear stress to the length of time the vegetation had been allowed to grow. Figure 16 relates channel liner roughness (Manning s n ) to flow depth. Together, this data describes the relevant performance characteristics of the tested RECP. It is important to note that ASTM D 6460, the procedure used to guide the testing reported herein, requires that three test replicates be performed using identical procedures to obtain an average threshold of performance. Thus, the results of the testing of vegetated channels reported herein, being single replicates of each condition, cannot be considered as an average threshold of performance. The data in Figures 17a, 17b, 18 and 19, the calculated energy grade lines for each channel and shear level, the retained vegetation at each shear level, and the control condition shear stress vs. soil loss relationships, are included to provide a reference for the reported test results.

ECP-3, Triple Net Polymer Fiber Matting, over Loam Channel Erosion Testing December 12, 2011 Appendix APPENDIX A RECORDED DATA Test Record Sheets (Note: Unvegetated Test Record Sheets are in a Separate Report)

2-1 CHANNEL 2 - SHEAR STRESS 1 Date: 9/29/10 Start Time: 11:30 AM End Time: 12:30 PM Soil: Loam Target Shear (psf): 2.00 Slope: 20% 40 ft long flume 20 ft test section RECP: ECP-3 Anchorage: rpms 2 ft wide flume TEST DATA 1 2 3 Outlet Weir Weir Channel Targets FLOW Water Depth, in 3.0 2.00 Weir width (ft) = 2 Water Velocity, ft/s 3.0 6.75 0 ft A B C Flow Rate, cfs 0.0 1.5 0.0 2.25 Cross-section 1 A B C V @ 0.2d V @ 0.6d V @ 0.8d To Water Surf, cm To original Surface Elev, cm 64.1 64.2 64.1 2.8 61.9 To eroded Surface Elev, cm 64.2 64.3 64.2 Vavg (fps) = 2.8 Soil Loss / Gain, cm -0.1-0.1-0.1 navg = 0.043 Clopper Soil Loss, cm -0.1-0.1-0.1 Flow (cfs) = 0.4 0.9 0.9 2 ft Avg Bottom Loss/Gain, in 0.0 Avg Clopper Soil Loss, in 0.0 Cross-section 2 A B C V @ 0.2d V @ 0.6d V @ 0.8d To Water Surf, cm To original Surface Elev, cm 62.8 64.0 63.5 4.0 61.3 To eroded Surface Elev, cm 62.9 64.2 63.7 Vavg (fps) = 4.0 Soil Loss / Gain, cm -0.1-0.2-0.2 navg = 0.030 Clopper Soil Loss, cm -0.1-0.2-0.2 Flow (cfs) = 0.6 0.9 0.9 4 ft Avg Bottom Loss/Gain, in -0.1 Avg Clopper Soil Loss, in -0.1 Cross-section 3 A B C V @ 0.2d V @ 0.6d V @ 0.8d To Water Surf, cm To original Surface Elev, cm 63.0 64.5 63.0 4.5 61.3 To eroded Surface Elev, cm 63.3 64.5 63.1 Vavg (fps) = 4.5 Soil Loss / Gain, cm -0.3 0.0-0.1 navg = 0.027 Clopper Soil Loss, cm -0.3 0.0-0.1 Flow (cfs) = 0.7 0.9 0.9 6 ft 25.5Loss/Gain, in -0.1 Avg Clopper Soil Loss, in -0.1 Cross-section 4 A B C V @ 0.2d V @ 0.6d V @ 0.8d To Water Surf, cm To original Surface Elev, cm 62.4 64.3 63.5 4.2 60.8 To eroded Surface Elev, cm 62.4 64.3 63.7 Vavg (fps) = 4.2 Soil Loss / Gain, cm 0.0 0.0-0.2 navg = 0.032 Clopper Soil Loss, cm 0.0 0.0-0.2 Flow (cfs) = 0.7 1.1 1.0 8 ft Avg Bottom Loss/Gain, in 0.0 Avg Clopper Soil Loss, in 0.0 Cross-section 5 A B C V @ 0.2d V @ 0.6d V @ 0.8d To Water Surf, cm To original Surface Elev, cm 62.2 65.0 63.4 4.1 61.8 To eroded Surface Elev, cm 62.3 65.0 63.7 Vavg (fps) = 4.1 Soil Loss / Gain, cm -0.1 0.0-0.3 navg = 0.025 Clopper Soil Loss, cm -0.1 0.0-0.3 Flow (cfs) = 0.5 0.8 0.7 10 ft Avg Bottom Loss/Gain, in -0.1 Avg Clopper Soil Loss, in -0.1 Cross-section 6 A B C V @ 0.2d V @ 0.6d V @ 0.8d To Water Surf, cm To original Surface Elev, cm 63.0 65.7 64.2 3.5 61.7 To eroded Surface Elev, cm 63.0 65.7 64.3 Vavg (fps) = 3.5 Soil Loss / Gain, cm 0.0 0.0-0.1 navg = 0.037 Clopper Soil Loss, cm 0.0 0.0-0.1 Flow (cfs) = 0.6 1.1 1.0 12 ft Avg Bottom Loss/Gain, in 0.0 Avg Clopper Soil Loss, in 0.0 Cross-section 7 A B C V @ 0.2d V @ 0.6d V @ 0.8d To Water Surf, cm To original Surface Elev, cm 62.8 64.0 63.3 3.0 61.4 To eroded Surface Elev, cm 62.8 64.1 63.4 Vavg (fps) = 3.0 Soil Loss / Gain, cm 0.0-0.1-0.1 navg = 0.036 Clopper Soil Loss, cm 0.0-0.1-0.1 Flow (cfs) = 0.4 0.8 0.8 14 ft Avg Bottom Loss/Gain, in 0.0 Avg Clopper Soil Loss, in 0.0 Cross-section 8 A B C V @ 0.2d V @ 0.6d V @ 0.8d To Water Surf, cm To original Surface Elev, cm 62.9 65.5 63.4 3.0 61.9 To eroded Surface Elev, cm 63.0 65.4 63.7 Vavg (fps) = 3.0 Soil Loss / Gain, cm -0.1 0.1-0.3 navg = 0.038 Clopper Soil Loss, cm -0.1 0.0-0.3 Flow (cfs) = 0.4 0.9 0.8 16 ft Avg Bottom Loss/Gain, in 0.0 Avg Clopper Soil Loss, in -0.1 Cross-section 9 A B C V @ 0.2d V @ 0.6d V @ 0.8d To Water Surf, cm To original Surface Elev, cm 62.6 66.0 63.4 3.4 62.1 To eroded Surface Elev, cm 62.7 66.5 63.0 Vavg (fps) = 3.4 Soil Loss / Gain, cm -0.1-0.5 0.4 navg = 0.031 Clopper Soil Loss, cm -0.1-0.5 0.0 Flow (cfs) = 0.4 0.8 0.8 18 ft Avg Bottom Loss/Gain, in 0.0 Avg Clopper Soil Loss, in -0.1 Cross-section 10 A B C V @ 0.2d V @ 0.6d V @ 0.8d To Water Surf, cm To original Surface Elev, cm 63.4 63.3 63.7 3.3 61.7 To eroded Surface Elev, cm 63.7 64.0 63.8 Vavg (fps) = 3.3 Soil Loss / Gain, cm -0.3-0.7-0.1 navg = 0.034 Clopper Soil Loss, cm -0.3-0.7-0.1 Flow (cfs) = 0.5 0.9 0.8 20 ft Avg Bottom Loss/Gain, in -0.1 Avg Clopper Soil Loss, in -0.1 Cross-section 11 A B C V @ 0.2d V @ 0.6d V @ 0.8d To Water Surf, cm To original Surface Elev, cm 62.6 63.2 62.5 3.5 61.2 To eroded Surface Elev, cm 62.1 63.1 62.6 Vavg (fps) = 3.5 Soil Loss / Gain, cm 0.5 0.1-0.1 navg = 0.024 4.5 pins / sy Clopper Soil Loss, cm 0.0 0.0-0.1 Flow (cfs) = 0.3 0.6 0.6 Avg Bottom Loss/Gain, in 0.1 Avg Clopper Soil Loss, in 0.0 Soil Loss / Gain, in 0.0-0.1 0.0 Avg Bottom Loss/Gain per Cross-Section = 0.0 Clopper Soil Loss, in 0.0-0.1-0.1 Avg Clopper Soil Loss per Cross-Section = -0.1

2-2 CHANNEL 2 - SHEAR STRESS 2 Date: 9.29/10 Start Time: 12:45 PM End Time: 1:45 PM Soil: Loam Target Shear (psf): 4.00 Slope: 20% 40 ft long flume 20 ft test section RECP: ECP-3 Anchorage: 1500 rpms 2 ft wide flume TEST DATA 1 2 3 Inlet Weir Weir Channel Targets FLOW Water Depth, in 9.0 4.00 Weir width (ft) = 4 Water Velocity, ft/s 3.5 11.81 0 ft A B C Flow Rate, cfs 0.0 10.5 0.0 7.88 Cross-section 1 A B C V @ 0.2d V @ 0.6d V @ 0.8d To Water Surf, cm To original Surface Elev, cm 64.1 64.2 64.1 6.1 59.0 To eroded Surface Elev, cm 64.4 64.5 64.4 Vavg (fps) = 6.1 Soil Loss / Gain, cm -0.3-0.3-0.3 navg = 0.035 Clopper Soil Loss, cm -0.3-0.3-0.3 Flow (cfs) = 2.2 2.2 2.1 2 ft Avg Bottom Loss/Gain, in -0.1 Avg Clopper Soil Loss, in -0.1 Cross-section 2 A B C V @ 0.2d V @ 0.6d V @ 0.8d To Water Surf, cm To original Surface Elev, cm 62.8 64.0 63.5 6.8 58.5 To eroded Surface Elev, cm 62.9 64.5 63.7 Vavg (fps) = 6.8 Soil Loss / Gain, cm -0.1-0.5-0.2 navg = 0.030 Clopper Soil Loss, cm -0.1-0.5-0.2 Flow (cfs) = 2.3 2.1 2.0 4 ft Avg Bottom Loss/Gain, in -0.1 Avg Clopper Soil Loss, in -0.1 Cross-section 3 A B C V @ 0.2d V @ 0.6d V @ 0.8d To Water Surf, cm To original Surface Elev, cm 63.0 64.5 63.0 7.5 58.0 To eroded Surface Elev, cm 63.2 64.5 63.2 Vavg (fps) = 7.5 Soil Loss / Gain, cm -0.2 0.0-0.2 navg = 0.029 Clopper Soil Loss, cm -0.2 0.0-0.2 Flow (cfs) = 2.8 2.3 2.2 6 ft Avg Bottom Loss/Gain, in -0.1 Avg Clopper Soil Loss, in -0.1 Cross-section 4 A B C V @ 0.2d V @ 0.6d V @ 0.8d To Water Surf, cm To original Surface Elev, cm 62.4 64.3 63.5 8.1 59.0 To eroded Surface Elev, cm 62.4 64.5 63.7 Vavg (fps) = 8.1 Soil Loss / Gain, cm 0.0-0.2-0.2 navg = 0.023 Clopper Soil Loss, cm 0.0-0.2-0.2 Flow (cfs) = 2.4 1.8 1.8 8 ft Avg Bottom Loss/Gain, in -0.1 Avg Clopper Soil Loss, in -0.1 Cross-section 5 A B C V @ 0.2d V @ 0.6d V @ 0.8d To Water Surf, cm To original Surface Elev, cm 62.2 65.0 63.4 7.5 60.0 To eroded Surface Elev, cm 62.5 65.3 63.7 Vavg (fps) = 7.5 Soil Loss / Gain, cm -0.3-0.3-0.3 navg = 0.022 Clopper Soil Loss, cm -0.3-0.3-0.3 Flow (cfs) = 1.9 1.6 1.5 10 ft Avg Bottom Loss/Gain, in -0.1 Avg Clopper Soil Loss, in -0.1 Cross-section 6 A B C V @ 0.2d V @ 0.6d V @ 0.8d To Water Surf, cm To original Surface Elev, cm 63.0 65.7 64.2 7.5 59.5 To eroded Surface Elev, cm 63.4 65.7 64.5 Vavg (fps) = 7.5 Soil Loss / Gain, cm -0.4 0.0-0.3 navg = 0.027 Clopper Soil Loss, cm -0.4 0.0-0.3 Flow (cfs) = 2.5 2.0 2.0 12 ft Avg Bottom Loss/Gain, in -0.1 Avg Clopper Soil Loss, in -0.1 Cross-section 7 A B C V @ 0.2d V @ 0.6d V @ 0.8d To Water Surf, cm To original Surface Elev, cm 62.8 64.0 63.3 6.8 59.0 To eroded Surface Elev, cm 63.1 64.3 63.5 Vavg (fps) = 6.8 Soil Loss / Gain, cm -0.3-0.3-0.2 navg = 0.028 Clopper Soil Loss, cm -0.3-0.3-0.2 Flow (cfs) = 2.1 1.9 1.8 14 ft Avg Bottom Loss/Gain, in -0.1 Avg Clopper Soil Loss, in -0.1 Cross-section 8 A B C V @ 0.2d V @ 0.6d V @ 0.8d To Water Surf, cm To original Surface Elev, cm 62.9 65.5 63.4 6.7 59.3 To eroded Surface Elev, cm 63.8 66.2 64.0 Vavg (fps) = 6.7 Soil Loss / Gain, cm -0.9-0.7-0.6 navg = 0.031 Clopper Soil Loss, cm -0.9-0.7-0.6 Flow (cfs) = 2.4 2.2 2.1 16 ft Avg Bottom Loss/Gain, in -0.3 Avg Clopper Soil Loss, in -0.3 Cross-section 9 A B C V @ 0.2d V @ 0.6d V @ 0.8d To Water Surf, cm To original Surface Elev, cm 62.6 66.0 63.4 6.2 59.8 To eroded Surface Elev, cm 62.6 64.8 64.0 Vavg (fps) = 6.2 Soil Loss / Gain, cm 0.0 1.2-0.6 navg = 0.028 Clopper Soil Loss, cm 0.0 0.0-0.6 Flow (cfs) = 1.6 1.6 1.6 18 ft Avg Bottom Loss/Gain, in 0.1 Avg Clopper Soil Loss, in -0.1 Cross-section 10 A B C V @ 0.2d V @ 0.6d V @ 0.8d To Water Surf, cm To original Surface Elev, cm 63.4 63.3 63.7 6.6 57.7 To eroded Surface Elev, cm 62.5 64.2 63.0 Vavg (fps) = 6.6 Soil Loss / Gain, cm 0.9-0.9 0.7 navg = 0.032 Clopper Soil Loss, cm 0.0-0.9 0.0 Flow (cfs) = 2.4 2.3 2.2 20 ft Avg Bottom Loss/Gain, in 0.1 Avg Clopper Soil Loss, in -0.1 Cross-section 11 A B C V @ 0.2d V @ 0.6d V @ 0.8d To Water Surf, cm To original Surface Elev, cm 62.6 63.2 62.5 6.8 58.2 To eroded Surface Elev, cm 62.2 63.2 62.8 Vavg (fps) = 6.8 Soil Loss / Gain, cm 0.4 0.0-0.3 navg = 0.027 4.5 pins / sy Clopper Soil Loss, cm 0.0 0.0-0.3 Flow (cfs) = 2.0 1.8 1.8 Avg Bottom Loss/Gain, in 0.0 Avg Clopper Soil Loss, in 0.0 Soil Loss / Gain, in 0.0-0.1-0.1 Avg Bottom Loss/Gain per Cross-Section = -0.1 Clopper Soil Loss, in -0.1-0.1-0.1 Avg Clopper Soil Loss per Cross-Section = -0.1

2-3 CHANNEL 2 - SHEAR STRESS 3 Date: 9/29/10 Start Time: 3:00 PM End Time: 4:00 PM Soil: Loam Target Shear (psf): 8.00 Slope: 20% 40 ft long flume 20 ft test section RECP: ECP-3 Anchorage: rpms 2 ft wide flume TEST DATA 1 2 3 Inlet Weir Weir Channel Targets FLOW Water Depth, in 20.0 7.50 Weir width (ft) = 2 Water Velocity, ft/s 4.5 18.00 0 ft A B C Flow Rate, cfs 0.0 15.0 0.0 22.50 Cross-section 1 A B C V @ 0.2d V @ 0.6d To Water Surf, cm To original Surface Elev, cm 64.1 64.2 64.1 12.0 53.5 To eroded Surface Elev, cm 64.8 64.8 64.5 Vavg (fps) = 12.0 Soil Loss / Gain, cm -0.7-0.6-0.4 navg = 0.028 Clopper Soil Loss, cm -0.7-0.6-0.4 Flow (cfs) = 8.8 4.6 4.4 2 ft Avg Bottom Loss/Gain, in -0.2 Avg Clopper Soil Loss, in -0.2 Cross-section 2 A B C V @ 0.2d V @ 0.6d V @ 0.8d To Water Surf, cm To original Surface Elev, cm 62.8 64.0 63.5 12.0 53.4 To eroded Surface Elev, cm 63.0 64.6 63.9 Vavg (fps) = 12.0 Soil Loss / Gain, cm -0.2-0.6-0.4 navg = 0.027 Clopper Soil Loss, cm -0.2-0.6-0.4 Flow (cfs) = 8.2 4.2 4.1 4 ft Avg Bottom Loss/Gain, in -0.2 Avg Clopper Soil Loss, in -0.2 Cross-section 3 A B C V @ 0.2d V @ 0.6d V @ 0.8d To Water Surf, cm To original Surface Elev, cm 63.0 64.5 63.0 12.2 52.8 To eroded Surface Elev, cm 61.2 64.8 63.3 Vavg (fps) = 12.2 Soil Loss / Gain, cm 1.8-0.3-0.3 navg = 0.026 Clopper Soil Loss, cm 0.0-0.3-0.3 Flow (cfs) = 8.2 4.2 4.1 6 ft Avg Bottom Loss/Gain, in 0.2 Avg Clopper Soil Loss, in -0.1 Cross-section 4 A B C V @ 0.2d V @ 0.6d V @ 0.8d To Water Surf, cm To original Surface Elev, cm 62.4 64.3 63.5 12.3 53.7 To eroded Surface Elev, cm 62.6 64.6 63.8 Vavg (fps) = 12.3 Soil Loss / Gain, cm -0.2-0.3-0.3 navg = 0.026 Clopper Soil Loss, cm -0.2-0.3-0.3 Flow (cfs) = 8.0 4.1 3.9 8 ft Avg Bottom Loss/Gain, in -0.1 Avg Clopper Soil Loss, in -0.1 Cross-section 5 A B C V @ 0.2d V @ 0.6d V @ 0.8d To Water Surf, cm To original Surface Elev, cm 62.2 65.0 63.4 12.5 53.4 To eroded Surface Elev, cm 62.4 65.3 63.9 Vavg (fps) = 12.5 Soil Loss / Gain, cm -0.2-0.3-0.5 navg = 0.026 Clopper Soil Loss, cm -0.2-0.3-0.5 Flow (cfs) = 8.6 4.3 4.1 10 ft Avg Bottom Loss/Gain, in -0.1 Avg Clopper Soil Loss, in -0.1 Cross-section 6 A B C V @ 0.2d V @ 0.6d V @ 0.8d To Water Surf, cm To original Surface Elev, cm 63.0 65.7 64.2 12.8 54.3 To eroded Surface Elev, cm 63.5 65.7 64.7 Vavg (fps) = 12.8 Soil Loss / Gain, cm -0.5 0.0-0.5 navg = 0.025 Clopper Soil Loss, cm -0.5 0.0-0.5 Flow (cfs) = 8.7 4.2 4.1 12 ft Avg Bottom Loss/Gain, in -0.1 Avg Clopper Soil Loss, in -0.1 Cross-section 7 A B C V @ 0.2d V @ 0.6d V @ 0.8d To Water Surf, cm To original Surface Elev, cm 62.8 64.0 63.3 12.7 54.9 To eroded Surface Elev, cm 63.2 64.5 64.3 Vavg (fps) = 12.7 Soil Loss / Gain, cm -0.4-0.5-1.0 navg = 0.0 Clopper Soil Loss, cm -0.4-0.5-1.0 Flow (cfs) = 7.6 3.7 3.6 14 ft Avg Bottom Loss/Gain, in -0.2 Avg Clopper Soil Loss, in -0.2 Cross-section 8 A B C V @ 0.2d V @ 0.6d V @ 0.8d To Water Surf, cm To original Surface Elev, cm 62.9 65.5 63.4 12.8 54.7 To eroded Surface Elev, cm 64.0 66.7 64.3 Vavg (fps) = 12.8 Soil Loss / Gain, cm -1.1-1.2-0.9 navg = 0.025 Clopper Soil Loss, cm -1.1-1.2-0.9 Flow (cfs) = 8.7 4.2 4.1 16 ft Avg Bottom Loss/Gain, in -0.4 Avg Clopper Soil Loss, in -0.4 Cross-section 9 A B C V @ 0.2d V @ 0.6d V @ 0.8d To Water Surf, cm To original Surface Elev, cm 62.6 66.0 63.4 13.1 54.2 To eroded Surface Elev, cm 62.8 65.7 65.3 Vavg (fps) = 13.1 Soil Loss / Gain, cm -0.2 0.3-1.9 navg = 0.025 Clopper Soil Loss, cm -0.2 0.0-1.9 Flow (cfs) = 8.9 4.2 4.1 18 ft Avg Bottom Loss/Gain, in -0.2 Avg Clopper Soil Loss, in -0.3 Cross-section 10 A B C V @ 0.2d V @ 0.6d V @ 0.8d To Water Surf, cm To original Surface Elev, cm 63.4 63.3 63.7 13.2 54.3 To eroded Surface Elev, cm 63.5 66.1 65.3 Vavg (fps) = 13.2 Soil Loss / Gain, cm -0.1-2.8-1.6 navg = 0.025 Clopper Soil Loss, cm -0.1-2.8-1.6 Flow (cfs) = 9.2 4.3 4.2 20 ft Avg Bottom Loss/Gain, in -0.6 Avg Clopper Soil Loss, in -0.6 Cross-section 11 A B C V @ 0.2d V @ 0.6d V @ 0.8d To Water Surf, cm To original Surface Elev, cm 62.6 63.2 62.5 13.2 54.4 To eroded Surface Elev, cm 62.4 65.3 63.8 Vavg (fps) = 13.2 Soil Loss / Gain, cm 0.2-2.1-1.3 navg = 0.023 4.5 pins / sy Clopper Soil Loss, cm 0.0-2.1-1.3 Flow (cfs) = 8.2 3.8 3.7 Avg Bottom Loss/Gain, in -0.4 Avg Clopper Soil Loss, in -0.4 Soil Loss / Gain, in -0.1-0.3-0.3 Avg Bottom Loss/Gain per Cross-Section = -0.2 Clopper Soil Loss, in -0.1-0.3-0.3 Avg Clopper Soil Loss per Cross-Section = -0.3

2-4 CHANNEL 2 - SHEAR STRESS 4 Date: 10/1/10 Start Time: 2:00 PM End Time: 3:00 PM Soil: Loam Target Shear (psf): 12.00 Slope: 20% 40 ft long flume 20 ft test section RECP: ECP-3 Anchorage: rpms 2 ft wide flume TEST DATA 1 2 3 Inlet Weir Weir Channel Targets FLOW Water Depth, in 13.5 11.40 Weir width (ft) = 2 C = 0.00 Water Velocity, ft/s 3.1 11.01 0 ft A B C Flow Rate, cfs 0.0 7.0 0.0 20.93 Cross-section 1 A B C V @ 0.2d V @ 0.6d V @ 0.8d To Water Surf, cm To original Surface Elev, cm 64.1 64.2 64.1 16.8 48.5 To eroded Surface Elev, cm 65.2 65.1 64.8 Vavg (fps) = 16.8 Soil Loss / Gain, cm -1.1-0.9-0.7 navg = 0.026 Clopper Soil Loss, cm -1.1-0.9-0.7 Flow (cfs) = 18.2 6.7 6.5 2 ft Avg Bottom Loss/Gain, in -0.4 Avg Clopper Soil Loss, in -0.4 Cross-section 2 A B C V @ 0.2d V @ 0.6d V @ 0.8d To Water Surf, cm To original Surface Elev, cm 62.8 64.0 63.5 17.0 47.0 To eroded Surface Elev, cm 63.1 64.8 64.3 Vavg (fps) = 17.0 Soil Loss / Gain, cm -0.3-0.8-0.8 navg = 0.027 Clopper Soil Loss, cm -0.3-0.8-0.8 Flow (cfs) = 19.0 6.9 6.7 4 ft Avg Bottom Loss/Gain, in -0.2 Avg Clopper Soil Loss, in -0.2 Cross-section 3 A B C V @ 0.2d V @ 0.6d V @ 0.8d To Water Surf, cm To original Surface Elev, cm 63.0 64.5 63.0 17.5 47.7 To eroded Surface Elev, cm 61.3 64.9 63.8 Vavg (fps) = 17.5 Soil Loss / Gain, cm 1.7-0.4-0.8 navg = 0.024 Clopper Soil Loss, cm 0.0-0.4-0.8 Flow (cfs) = 18.0 6.4 6.2 6 ft Avg Bottom Loss/Gain, in 0.1 Avg Clopper Soil Loss, in -0.2 Cross-section 4 A B C V @ 0.2d V @ 0.6d V @ 0.8d To Water Surf, cm To original Surface Elev, cm 62.4 64.3 63.5 17.4 47.7 To eroded Surface Elev, cm 62.8 65.0 64.0 Vavg (fps) = 17.4 Soil Loss / Gain, cm -0.4-0.7-0.5 navg = 0.025 Clopper Soil Loss, cm -0.4-0.7-0.5 Flow (cfs) = 18.5 6.6 6.4 8 ft Avg Bottom Loss/Gain, in -0.2 Avg Clopper Soil Loss, in -0.2 Cross-section 5 A B C V @ 0.2d V @ 0.6d V @ 0.8d To Water Surf, cm To original Surface Elev, cm 62.2 65.0 63.4 17.3 47.8 To eroded Surface Elev, cm 62.5 65.4 64.8 Vavg (fps) = 17.3 Soil Loss / Gain, cm -0.3-0.4-1.4 navg = 0.025 Clopper Soil Loss, cm -0.3-0.4-1.4 Flow (cfs) = 18.7 6.7 6.5 10 ft Avg Bottom Loss/Gain, in -0.3 Avg Clopper Soil Loss, in -0.3 Cross-section 6 A B C V @ 0.2d V @ 0.6d V @ 0.8d To Water Surf, cm To original Surface Elev, cm 63.0 65.7 64.2 17.5 48.2 To eroded Surface Elev, cm 63.6 65.6 64.9 Vavg (fps) = 17.5 Soil Loss / Gain, cm -0.6 0.1-0.7 navg = 0.025 Clopper Soil Loss, cm -0.6 0.0-0.7 Flow (cfs) = 18.9 6.7 6.5 12 ft Avg Bottom Loss/Gain, in -0.2 Avg Clopper Soil Loss, in -0.2 Cross-section 7 A B C V @ 0.2d V @ 0.6d V @ 0.8d To Water Surf, cm To original Surface Elev, cm 62.8 64.0 63.3 17.5 49.2 To eroded Surface Elev, cm 64.1 65.4 64.3 Vavg (fps) = 17.5 Soil Loss / Gain, cm -1.3-1.4-1.0 navg = 0.024 Clopper Soil Loss, cm -1.3-1.4-1.0 Flow (cfs) = 17.7 6.3 6.1 14 ft Avg Bottom Loss/Gain, in -0.5 Avg Clopper Soil Loss, in -0.5 Cross-section 8 A B C V @ 0.2d V @ 0.6d V @ 0.8d To Water Surf, cm To original Surface Elev, cm 62.9 65.5 63.4 18.0 50.7 To eroded Surface Elev, cm 65.3 67.2 65.3 Vavg (fps) = 18.0 Soil Loss / Gain, cm -2.4-1.7-1.9 navg = 0.023 Clopper Soil Loss, cm -2.4-1.7-1.9 Flow (cfs) = 18.0 6.2 6.0 16 ft Avg Bottom Loss/Gain, in -0.8 Avg Clopper Soil Loss, in -0.8 Cross-section 9 A B C V @ 0.2d V @ 0.6d V @ 0.8d To Water Surf, cm To original Surface Elev, cm 62.6 66.0 63.4 17.8 50.9 To eroded Surface Elev, cm 64.8 66.9 65.7 Vavg (fps) = 17.8 Soil Loss / Gain, cm -2.2-0.9-2.3 navg = 0.023 Clopper Soil Loss, cm -2.2-0.9-2.3 Flow (cfs) = 17.4 6.1 5.9 18 ft Avg Bottom Loss/Gain, in -0.7 Avg Clopper Soil Loss, in -0.7 Cross-section 10 A B C V @ 0.2d V @ 0.6d V @ 0.8d To Water Surf, cm To original Surface Elev, cm 63.4 63.3 63.7 17.9 50.8 To eroded Surface Elev, cm 64.8 67.2 66.5 Vavg (fps) = 17.9 Soil Loss / Gain, cm -1.4-3.9-2.8 navg = 0.024 Clopper Soil Loss, cm -1.4-3.9-2.8 Flow (cfs) = 18.0 6.3 6.0 20 ft Avg Bottom Loss/Gain, in -1.1 Avg Clopper Soil Loss, in -1.1 Cross-section 11 A B C V @ 0.2d V @ 0.6d V @ 0.8d To Water Surf, cm To original Surface Elev, cm 62.6 63.2 62.5 17.8 51.6 To eroded Surface Elev, cm 64.4 66.8 65.3 Vavg (fps) = 17.8 Soil Loss / Gain, cm -1.8-3.6-2.8 navg = 0.022 4.5 pins / sy Clopper Soil Loss, cm -1.8-3.6-2.8 Flow (cfs) = 16.2 5.7 5.5 Avg Bottom Loss/Gain, in -1.1 Avg Clopper Soil Loss, in -1.1 Soil Loss / Gain, in -0.4-0.5-0.6 Avg Bottom Loss/Gain per Cross-Section = -0.5 Clopper Soil Loss, in -0.4-0.5-0.6 Avg Clopper Soil Loss per Cross-Section = -0.5

3-1 CHANNEL 3 - SHEAR STRESS 1 Date: 10/18/11 Start Time: 10:00 AM End Time: 11:00 AM Soil: Loam Target Shear (psf): 2.00 Slope: 20% 40 ft long flume 20 ft test section RECP: ECP-3 Anchorage: rpms 2 ft wide flume TEST DATA 1 2 3 Outlet Weir Weir Channel Targets FLOW Water Depth, in 0.00 0.00 Weir width (ft) = 2 Water Velocity, ft/s 0.00 0.00 0 ft A B C Flow Rate, cfs 0.00 0.00 0.00 1.72 Cross-section 1 A B C V @ 0.2d V @ 0.6d V @ 0.8d To Water Surf, cm To original Surface Elev, cm 56.9 57.4 56.4 4.73 51.5 To eroded Surface Elev, cm 57 57.4 56.7 Vavg (fps) = 4.73 Soil Loss / Gain, cm -0.1 0-0.3 navg = 0.045 Clopper Soil Loss, cm -0.1 0-0.3 Flow (cfs) = 1.72 2.25 2.18 2 ft Avg Bottom Loss/Gain, in -0.05 Avg Clopper Soil Loss, in -0.05 Cross-section 2 A B C V @ 0.2d V @ 0.6d V @ 0.8d To Water Surf, cm To original Surface Elev, cm 58 58.5 57 4.81 52.5 To eroded Surface Elev, cm 58.2 58.6 57 Vavg (fps) = 4.81 Soil Loss / Gain, cm -0.2-0.1 0 navg = 0.044 Clopper Soil Loss, cm -0.2-0.1 0 Flow (cfs) = 1.72 2.21 2.14 4 ft Avg Bottom Loss/Gain, in -0.04 Avg Clopper Soil Loss, in -0.04 Cross-section 3 A B C V @ 0.2d V @ 0.6d V @ 0.8d To Water Surf, cm To original Surface Elev, cm 60 59.1 58 5.06 54.0 To eroded Surface Elev, cm 60.4 59.2 57.9 Vavg (fps) = 5.06 Soil Loss / Gain, cm -0.4-0.1 0.1 navg = 0.040 Clopper Soil Loss, cm -0.4-0.1 0 Flow (cfs) = 1.72 2.10 2.03 6 ft 25.5Loss/Gain, in -0.05 Avg Clopper Soil Loss, in -0.07 Cross-section 4 A B C V @ 0.2d V @ 0.6d V @ 0.8d To Water Surf, cm To original Surface Elev, cm 58 58 56.5 5.68 53.0 To eroded Surface Elev, cm 58.2 58.2 56.4 Vavg (fps) = 5.68 Soil Loss / Gain, cm -0.2-0.2 0.1 navg = 0.033 Clopper Soil Loss, cm -0.2-0.2 0 Flow (cfs) = 1.72 1.87 1.81 8 ft Avg Bottom Loss/Gain, in -0.04 Avg Clopper Soil Loss, in -0.05 Cross-section 5 A B C V @ 0.2d V @ 0.6d V @ 0.8d To Water Surf, cm To original Surface Elev, cm 58.5 59 57.5 5.30 53.5 To eroded Surface Elev, cm 58.5 59.1 57.7 Vavg (fps) = 5.30 Soil Loss / Gain, cm 0-0.1-0.2 navg = 0.037 Clopper Soil Loss, cm 0-0.1-0.2 Flow (cfs) = 1.72 2.01 1.94 10 ft Avg Bottom Loss/Gain, in -0.04 Avg Clopper Soil Loss, in -0.04 Cross-section 6 A B C V @ 0.2d V @ 0.6d V @ 0.8d To Water Surf, cm To original Surface Elev, cm 59 59.2 56.6 5.64 53.6 To eroded Surface Elev, cm 58.5 59.2 57 Vavg (fps) = 5.64 Soil Loss / Gain, cm 0.5 0-0.4 navg = 0.034 Clopper Soil Loss, cm 0 0-0.4 Flow (cfs) = 1.72 1.88 1.82 12 ft Avg Bottom Loss/Gain, in 0.01 Avg Clopper Soil Loss, in -0.05 Cross-section 7 A B C V @ 0.2d V @ 0.6d V @ 0.8d To Water Surf, cm To original Surface Elev, cm 59 59 57.5 6.08 54.0 To eroded Surface Elev, cm 58.5 59 57.4 Vavg (fps) = 6.08 Soil Loss / Gain, cm 0.5 0 0.1 navg = 0.030 Clopper Soil Loss, cm 0 0 0 Flow (cfs) = 1.72 1.75 1.69 14 ft Avg Bottom Loss/Gain, in 0.08 Avg Clopper Soil Loss, in 0.00 Cross-section 8 A B C V @ 0.2d V @ 0.6d V @ 0.8d To Water Surf, cm To original Surface Elev, cm 59 59.6 56.5 5.85 54.0 To eroded Surface Elev, cm 59.2 59.6 56.6 Vavg (fps) = 5.85 Soil Loss / Gain, cm -0.2 0-0.1 navg = 0.032 Clopper Soil Loss, cm -0.2 0-0.1 Flow (cfs) = 1.72 1.82 1.76 16 ft Avg Bottom Loss/Gain, in -0.04 Avg Clopper Soil Loss, in -0.04 Cross-section 9 A B C V @ 0.2d V @ 0.6d V @ 0.8d To Water Surf, cm To original Surface Elev, cm 58 58.7 56.6 5.90 53.5 To eroded Surface Elev, cm 58.3 58.8 56.7 Vavg (fps) = 5.90 Soil Loss / Gain, cm -0.3-0.1-0.1 navg = 0.031 Clopper Soil Loss, cm -0.3-0.1-0.1 Flow (cfs) = 1.72 1.80 1.75 18 ft Avg Bottom Loss/Gain, in -0.07 Avg Clopper Soil Loss, in -0.07 Cross-section 10 A B C V @ 0.2d V @ 0.6d V @ 0.8d To Water Surf, cm To original Surface Elev, cm 58 59.7 57.5 6.43 54.5 To eroded Surface Elev, cm 58.2 60 57.5 Vavg (fps) = 6.43 Soil Loss / Gain, cm -0.2-0.3 0 navg = 0.027 Clopper Soil Loss, cm -0.2-0.3 0 Flow (cfs) = 1.72 1.65 1.60 20 ft Avg Bottom Loss/Gain, in -0.07 Avg Clopper Soil Loss, in -0.07 Cross-section 11 A B C V @ 0.2d V @ 0.6d V @ 0.8d To Water Surf, cm To original Surface Elev, cm 59.2 60.2 58 6.48 55.2 To eroded Surface Elev, cm 59.3 60.2 58.2 Vavg (fps) = 6.48 Soil Loss / Gain, cm -0.1 0-0.2 navg = 0.027 3.8 pins / sy Clopper Soil Loss, cm -0.1 0-0.2 Flow (cfs) = 1.72 1.64 1.59 Avg Bottom Loss/Gain, in -0.04 Avg Clopper Soil Loss, in -0.04 Soil Loss / Gain, in -0.03-0.03-0.04 Avg Bottom Loss/Gain per Cross-Section = -0.03 Clopper Soil Loss, in -0.06-0.03-0.05 Avg Clopper Soil Loss per Cross-Section = -0.05

3-2 CHANNEL 3 - SHEAR STRESS 2 Date: 10/18/11 Start Time: 11:45 AM End Time: 12:45 PM Soil: Loam Target Shear (psf): 4.00 Slope: 20% 40 ft long flume 20 ft test section RECP: ECP-3 Anchorage: 1500 rpms 2 ft wide flume TEST DATA 1 2 3 Inlet Weir Weir Channel Targets FLOW Water Depth, in 0.00 0.00 Weir width (ft) = Water Velocity, ft/s 0.00 0.00 0 ft A B C Flow Rate, cfs 0.00 0.00 0.00 8.89 Cross-section 1 A B C V @ 0.2d V @ 0.6d V @ 0.8d To Water Surf, cm To original Surface Elev, cm 56.9 57.4 56.4 10.67 44.5 To eroded Surface Elev, cm 57.2 57.4 57 Vavg (fps) = 10.67 Soil Loss / Gain, cm -0.3 0-0.6 navg = 0.035 Clopper Soil Loss, cm -0.3 0-0.6 Flow (cfs) = 8.89 5.17 5.00 2 ft Avg Bottom Loss/Gain, in -0.12 Avg Clopper Soil Loss, in -0.12 Cross-section 2 A B C V @ 0.2d V @ 0.6d V @ 0.8d To Water Surf, cm To original Surface Elev, cm 58 58.5 57 10.87 45.7 To eroded Surface Elev, cm 58.5 59 57 Vavg (fps) = 10.87 Soil Loss / Gain, cm -0.5-0.5 0 navg = 0.034 Clopper Soil Loss, cm -0.5-0.5 0 Flow (cfs) = 8.89 5.07 4.91 4 ft Avg Bottom Loss/Gain, in -0.13 Avg Clopper Soil Loss, in -0.13 Cross-section 3 A B C V @ 0.2d V @ 0.6d V @ 0.8d To Water Surf, cm To original Surface Elev, cm 60 59.1 58 10.75 46.8 To eroded Surface Elev, cm 60.7 59.5 58 Vavg (fps) = 10.75 Soil Loss / Gain, cm -0.7-0.4 0 navg = 0.034 Clopper Soil Loss, cm -0.7-0.4 0 Flow (cfs) = 8.89 5.12 4.96 6 ft Avg Bottom Loss/Gain, in -0.14 Avg Clopper Soil Loss, in -0.14 Cross-section 4 A B C V @ 0.2d V @ 0.6d V @ 0.8d To Water Surf, cm To original Surface Elev, cm 58 58 56.5 11.11 45.6 To eroded Surface Elev, cm 58.4 58.5 56.5 Vavg (fps) = 11.11 Soil Loss / Gain, cm -0.4-0.5 0 navg = 0.032 Clopper Soil Loss, cm -0.4-0.5 0 Flow (cfs) = 8.89 4.96 4.80 8 ft Avg Bottom Loss/Gain, in -0.12 Avg Clopper Soil Loss, in -0.12 Cross-section 5 A B C V @ 0.2d V @ 0.6d V @ 0.8d To Water Surf, cm To original Surface Elev, cm 58.5 59 57.5 11.39 46.6 To eroded Surface Elev, cm 58.5 59 58 Vavg (fps) = 11.39 Soil Loss / Gain, cm 0 0-0.5 navg = 0.031 Clopper Soil Loss, cm 0 0-0.5 Flow (cfs) = 8.89 4.84 4.69 10 ft Avg Bottom Loss/Gain, in -0.07 Avg Clopper Soil Loss, in -0.07 Cross-section 6 A B C V @ 0.2d V @ 0.6d V @ 0.8d To Water Surf, cm To original Surface Elev, cm 59 59.2 56.6 11.58 46.8 To eroded Surface Elev, cm 59 59.5 57 Vavg (fps) = 11.58 Soil Loss / Gain, cm 0-0.3-0.4 navg = 0.030 Clopper Soil Loss, cm 0-0.3-0.4 Flow (cfs) = 8.89 4.76 4.61 12 ft Avg Bottom Loss/Gain, in -0.09 Avg Clopper Soil Loss, in -0.09 Cross-section 7 A B C V @ 0.2d V @ 0.6d V @ 0.8d To Water Surf, cm To original Surface Elev, cm 59 59 57.5 12.43 48.1 To eroded Surface Elev, cm 59 60 58 Vavg (fps) = 12.43 Soil Loss / Gain, cm 0-1 -0.5 navg = 0.027 Clopper Soil Loss, cm 0-1 -0.5 Flow (cfs) = 8.89 4.43 4.29 14 ft Avg Bottom Loss/Gain, in -0.20 Avg Clopper Soil Loss, in -0.20 Cross-section 8 A B C V @ 0.2d V @ 0.6d V @ 0.8d To Water Surf, cm To original Surface Elev, cm 59 59.6 56.5 12.91 48.3 To eroded Surface Elev, cm 59.6 60 56.8 Vavg (fps) = 12.91 Soil Loss / Gain, cm -0.6-0.4-0.3 navg = 0.025 Clopper Soil Loss, cm -0.6-0.4-0.3 Flow (cfs) = 8.89 4.27 4.13 16 ft Avg Bottom Loss/Gain, in -0.17 Avg Clopper Soil Loss, in -0.17 Cross-section 9 A B C V @ 0.2d V @ 0.6d V @ 0.8d To Water Surf, cm To original Surface Elev, cm 58 58.7 56.6 12.59 47.4 To eroded Surface Elev, cm 58.5 59 57 Vavg (fps) = 12.59 Soil Loss / Gain, cm -0.5-0.3-0.4 navg = 0.026 Clopper Soil Loss, cm -0.5-0.3-0.4 Flow (cfs) = 8.89 4.38 4.24 18 ft Avg Bottom Loss/Gain, in -0.16 Avg Clopper Soil Loss, in -0.16 Cross-section 10 A B C V @ 0.2d V @ 0.6d V @ 0.8d To Water Surf, cm To original Surface Elev, cm 58 59.7 57.5 13.07 48.4 To eroded Surface Elev, cm 58.5 60.3 57.5 Vavg (fps) = 13.07 Soil Loss / Gain, cm -0.5-0.6 0 navg = 0.025 Clopper Soil Loss, cm -0.5-0.6 0 Flow (cfs) = 8.89 4.22 4.08 20 ft Avg Bottom Loss/Gain, in -0.14 Avg Clopper Soil Loss, in -0.14 Cross-section 11 A B C V @ 0.2d V @ 0.6d V @ 0.8d To Water Surf, cm To original Surface Elev, cm 59.2 60.2 58 13.55 49.5 To eroded Surface Elev, cm 59.5 60.5 58.5 Vavg (fps) = 13.55 Soil Loss / Gain, cm -0.3-0.3-0.5 navg = 0.023 3.8 pins / sy Clopper Soil Loss, cm -0.3-0.3-0.5 Flow (cfs) = 8.89 4.07 3.94 Avg Bottom Loss/Gain, in -0.14 Avg Clopper Soil Loss, in -0.14 Soil Loss / Gain, in -0.14-0.15-0.11 Avg Bottom Loss/Gain per Cross-Section = -0.13 Clopper Soil Loss, in -0.14-0.15-0.11 Avg Clopper Soil Loss per Cross-Section = -0.13

3-3 CHANNEL 3 - SHEAR STRESS 3 Date: 10/18/11 Start Time: 2:00 PM End Time: Soil: Loam Target Shear (psf): 3.00 Slope: 20% 40 ft long flume 20 ft test section RECP: ECP-3 Anchorage: rpms 2 ft wide flume TEST DATA 1 2 3 Inlet Weir Weir Channel Targets FLOW Water Depth, in 0.00 0.00 Weir width (ft) = 4 Water Velocity, ft/s 0.00 0.00 ft A B C Flow Rate, cfs 0.00 0.00 0.00 25.53 Cross-section 1 A B C V @ 0.2d V @ 0.6d V @ 0.8d To Water Surf, cm To original Surface Elev, cm 56.9 57.4 56.4 18.24 36.0 To eroded Surface Elev, cm 57.5 57.5 57 Vavg (fps) = 18.24 Soil Loss / Gain, cm -0.6-0.1-0.6 navg = 0.029 Clopper Soil Loss, cm -0.6-0.1-0.6 Flow (cfs) = 25.53 8.68 8.40 2 ft Avg Bottom Loss/Gain, in -0.17 Avg Clopper Soil Loss, in -0.17 Cross-section 2 A B C V @ 0.2d V @ 0.6d V @ 0.8d To Water Surf, cm To original Surface Elev, cm 58 58.5 57 18.38 37.0 To eroded Surface Elev, cm 58.5 59 57 Vavg (fps) = 18.38 Soil Loss / Gain, cm -0.5-0.5 0 navg = 0.028 Clopper Soil Loss, cm -0.5-0.5 0 Flow (cfs) = 25.53 8.61 8.33 4 ft Avg Bottom Loss/Gain, in -0.13 Avg Clopper Soil Loss, in -0.13 Cross-section 3 A B C V @ 0.2d V @ 0.6d V @ 0.8d To Water Surf, cm To original Surface Elev, cm 60 59.1 58 18.95 39.0 To eroded Surface Elev, cm 60.9 59.7 58 Vavg (fps) = 18.95 Soil Loss / Gain, cm -0.9-0.6 0 navg = 0.027 Clopper Soil Loss, cm -0.9-0.6 0 Flow (cfs) = 25.53 8.35 8.08 6 ft Avg Bottom Loss/Gain, in -0.20 Avg Clopper Soil Loss, in -0.20 Cross-section 4 A B C V @ 0.2d V @ 0.6d V @ 0.8d To Water Surf, cm To original Surface Elev, cm 58 58 56.5 19.07 37.5 To eroded Surface Elev, cm 58.5 58.7 56.5 Vavg (fps) = 19.07 Soil Loss / Gain, cm -0.5-0.7 0 navg = 0.027 Clopper Soil Loss, cm -0.5-0.7 0 Flow (cfs) = 25.53 8.30 8.03 8 ft Avg Bottom Loss/Gain, in -0.16 Avg Clopper Soil Loss, in -0.16 Cross-section 5 A B C V @ 0.2d V @ 0.6d V @ 0.8d To Water Surf, cm To original Surface Elev, cm 58.5 59 57.5 19.29 38.5 To eroded Surface Elev, cm 58.8 59.2 58 Vavg (fps) = 19.29 Soil Loss / Gain, cm -0.3-0.2-0.5 navg = 0.026 Clopper Soil Loss, cm -0.3-0.2-0.5 Flow (cfs) = 25.53 8.20 7.94 10 ft Avg Bottom Loss/Gain, in -0.13 Avg Clopper Soil Loss, in -0.13 Cross-section 6 A B C V @ 0.2d V @ 0.6d V @ 0.8d To Water Surf, cm To original Surface Elev, cm 59 59.2 56.6 19.29 39.0 To eroded Surface Elev, cm 60 60 57.5 Vavg (fps) = 19.29 Soil Loss / Gain, cm -1-0.8-0.9 navg = 0.026 Clopper Soil Loss, cm -1-0.8-0.9 Flow (cfs) = 25.53 8.20 7.94 12 ft Avg Bottom Loss/Gain, in -0.35 Avg Clopper Soil Loss, in -0.35 Cross-section 7 A B C V @ 0.2d V @ 0.6d V @ 0.8d To Water Surf, cm To original Surface Elev, cm 59 59 57.5 19.68 39.0 To eroded Surface Elev, cm 58 60.3 58 Vavg (fps) = 19.68 Soil Loss / Gain, cm 1-1.3-0.5 navg = 0.025 Clopper Soil Loss, cm 0-1.3-0.5 Flow (cfs) = 25.53 8.04 7.78 14 ft Avg Bottom Loss/Gain, in -0.10 Avg Clopper Soil Loss, in -0.24 Cross-section 8 A B C V @ 0.2d V @ 0.6d V @ 0.8d To Water Surf, cm To original Surface Elev, cm 59 59.6 56.5 19.95177806 39.5 To eroded Surface Elev, cm 59.5 60.5 57 Vavg (fps) = 19.95 Soil Loss / Gain, cm -0.5-0.9-0.5 navg = 0.025 Clopper Soil Loss, cm -0.5-0.9-0.5 Flow (cfs) = 25.53 7.93 7.68 16 ft Avg Bottom Loss/Gain, in -0.25 Avg Clopper Soil Loss, in -0.25 Cross-section 9 A B C V @ 0.2d V @ 0.6d V @ 0.8d To Water Surf, cm To original Surface Elev, cm 58 58.7 56.6 19.78 39.4 To eroded Surface Elev, cm 59 60.2 58 Vavg (fps) = 19.78 Soil Loss / Gain, cm -1-1.5-1.4 navg = 0.025 Clopper Soil Loss, cm -1-1.5-1.4 Flow (cfs) = 25.53 8.00 7.74 18 ft Avg Bottom Loss/Gain, in -0.51 Avg Clopper Soil Loss, in -0.51 Cross-section 10 A B C V @ 0.2d V @ 0.6d V @ 0.8d To Water Surf, cm To original Surface Elev, cm 58 59.7 57.5 20.48 40.5 To eroded Surface Elev, cm 59 61 58.5 Vavg (fps) = 20.48 Soil Loss / Gain, cm -1-1.3-1 navg = 0.024 Clopper Soil Loss, cm -1-1.3-1 Flow (cfs) = 25.53 7.73 7.48 20 ft Avg Bottom Loss/Gain, in -0.43 Avg Clopper Soil Loss, in -0.43 Cross-section 11 A B C V @ 0.2d V @ 0.6d V @ 0.8d To Water Surf, cm To original Surface Elev, cm 59.2 60.2 58 21.22 41.5 To eroded Surface Elev, cm 59.5 61 59 Vavg (fps) = 21.22 Soil Loss / Gain, cm -0.3-0.8-1 navg = 0.022 3.8 pins / sy Clopper Soil Loss, cm -0.3-0.8-1 Flow (cfs) = 25.53 7.46 7.22 Avg Bottom Loss/Gain, in -0.28 Avg Clopper Soil Loss, in -0.28 Soil Loss / Gain, in -0.20-0.31-0.23 Avg Bottom Loss/Gain per Cross-Section = -0.25 Clopper Soil Loss, in -0.24-0.31-0.23 Avg Clopper Soil Loss per Cross-Section = -0.26

3-4 CHANNEL 3 - SHEAR STRESS 4 Date: 10/18/11 Start Time: 4:00 PM End Time: Soil: Loam Target Shear (psf): 4.00 Slope: 20% 40 ft long flume 20 ft test section RECP: ECP-3 Anchorage: rpms 2 ft wide flume TEST DATA 1 2 3 Inlet Weir Weir Channel Targets FLOW Water Depth, in 0.00 0.00 Weir width (ft) = 2.00 C = 0.00 Water Velocity, ft/s 0.00 0.00 0 ft A B C Flow Rate, cfs 0.00 0.00 0.00 40.46 Cross-section 1 A B C V @ 0.2d V @ 0.6d V @ 0.8d To Water Surf, cm To original Surface Elev, cm 56.9 57.4 56.4 21.66339415 29.0 To eroded Surface Elev, cm 58 57.4 57 Vavg (fps) = 21.66 Soil Loss / Gain, cm -1.1 0-0.6 navg = 0.029 Clopper Soil Loss, cm -1.1 0-0.6 Flow (cfs) = 40.46 11.58 11.21 2 ft Avg Bottom Loss/Gain, in -0.22 Avg Clopper Soil Loss, in -0.22 Cross-section 2 A B C V @ 0.2d V @ 0.6d V @ 0.8d To Water Surf, cm To original Surface Elev, cm 58 58.5 57 21.84243047 30.0 To eroded Surface Elev, cm 58.7 59 57 Vavg (fps) = 21.84 Soil Loss / Gain, cm -0.7-0.5 0 navg = 0.029 Clopper Soil Loss, cm -0.7-0.5 0 Flow (cfs) = 40.46 11.48 11.12 4 ft Avg Bottom Loss/Gain, in -0.16 Avg Clopper Soil Loss, in -0.16 Cross-section 3 A B C V @ 0.2d V @ 0.6d V @ 0.8d To Water Surf, cm To original Surface Elev, cm 60 59.1 58 22.34364566 32.0 To eroded Surface Elev, cm 61 59.8 58 Vavg (fps) = 22.34 Soil Loss / Gain, cm -1-0.7 0 navg = 0.028 Clopper Soil Loss, cm -1-0.7 0 Flow (cfs) = 40.46 11.23 10.87 6 ft Avg Bottom Loss/Gain, in -0.22 Avg Clopper Soil Loss, in -0.22 Cross-section 4 A B C V @ 0.2d V @ 0.6d V @ 0.8d To Water Surf, cm To original Surface Elev, cm 58 58 56.5 22.56163245 31.0 To eroded Surface Elev, cm 59 59 57 Vavg (fps) = 22.56 Soil Loss / Gain, cm -1-1 -0.5 navg = 0.027 Clopper Soil Loss, cm -1-1 -0.5 Flow (cfs) = 40.46 11.12 10.76 8 ft Avg Bottom Loss/Gain, in -0.33 Avg Clopper Soil Loss, in -0.33 Cross-section 5 A B C V @ 0.2d V @ 0.6d V @ 0.8d To Water Surf, cm To original Surface Elev, cm 58.5 59 57.5 22.56163245 31.5 To eroded Surface Elev, cm 59 59.5 58 Vavg (fps) = 22.56 Soil Loss / Gain, cm -0.5-0.5-0.5 navg = 0.027 Clopper Soil Loss, cm -0.5-0.5-0.5 Flow (cfs) = 40.46 11.12 10.76 10 ft Avg Bottom Loss/Gain, in -0.20 Avg Clopper Soil Loss, in -0.20 Cross-section 6 A B C V @ 0.2d V @ 0.6d V @ 0.8d To Water Surf, cm To original Surface Elev, cm 59 59.2 56.6 22.70004737 32.5 To eroded Surface Elev, cm 60.5 61 57.5 Vavg (fps) = 22.70 Soil Loss / Gain, cm -1.5-1.8-0.9 navg = 0.027 Clopper Soil Loss, cm -1.5-1.8-0.9 Flow (cfs) = 40.46 11.05 10.70 12 ft Avg Bottom Loss/Gain, in -0.55 Avg Clopper Soil Loss, in -0.55 Cross-section 7 A B C V @ 0.2d V @ 0.6d V @ 0.8d To Water Surf, cm To original Surface Elev, cm 59 59 57.5 23.27111774 33.0 To eroded Surface Elev, cm 59.5 60.5 58.5 Vavg (fps) = 23.27 Soil Loss / Gain, cm -0.5-1.5-1 navg = 0.026 Clopper Soil Loss, cm -0.5-1.5-1 Flow (cfs) = 40.46 10.78 10.43 14 ft Avg Bottom Loss/Gain, in -0.39 Avg Clopper Soil Loss, in -0.39 Cross-section 8 A B C V @ 0.2d V @ 0.6d V @ 0.8d To Water Surf, cm To original Surface Elev, cm 59 59.6 56.5 23.47784087 33.0 To eroded Surface Elev, cm 59.8 60.5 57.5 Vavg (fps) = 23.48 Soil Loss / Gain, cm -0.8-0.9-1 navg = 0.026 Clopper Soil Loss, cm -0.8-0.9-1 Flow (cfs) = 40.46 10.68 10.34 16 ft Avg Bottom Loss/Gain, in -0.35 Avg Clopper Soil Loss, in -0.35 Cross-section 9 A B C V @ 0.2d V @ 0.6d V @ 0.8d To Water Surf, cm To original Surface Elev, cm 58 58.7 56.6 23.71863924 33.5 To eroded Surface Elev, cm 59 60.5 59 Vavg (fps) = 23.72 Soil Loss / Gain, cm -1-1.8-2.4 navg = 0.025 Clopper Soil Loss, cm -1-1.8-2.4 Flow (cfs) = 40.46 10.57 10.24 18 ft Avg Bottom Loss/Gain, in -0.68 Avg Clopper Soil Loss, in -0.68 Cross-section 10 A B C V @ 0.2d V @ 0.6d V @ 0.8d To Water Surf, cm To original Surface Elev, cm 58 59.7 57.5 24.02667352 34.0 To eroded Surface Elev, cm 59 61 59 Vavg (fps) = 24.03 Soil Loss / Gain, cm -1-1.3-1.5 navg = 0.025 Clopper Soil Loss, cm -1-1.3-1.5 Flow (cfs) = 40.46 10.44 10.10 20 ft Avg Bottom Loss/Gain, in -0.50 Avg Clopper Soil Loss, in -0.50 Cross-section 11 A B C V @ 0.2d V @ 0.6d V @ 0.8d To Water Surf, cm To original Surface Elev, cm 59.2 60.2 58 24.1837106 35.0 To eroded Surface Elev, cm 60 61.5 60 Vavg (fps) = 24.18 Soil Loss / Gain, cm -0.8-1.3-2 navg = 0.024 3.8 pins / sy Clopper Soil Loss, cm -0.8-1.3-2 Flow (cfs) = 40.46 10.37 10.04 Avg Bottom Loss/Gain, in -0.54 Avg Clopper Soil Loss, in -0.54 Soil Loss / Gain, in -0.35-0.40-0.37 Avg Bottom Loss/Gain per Cross-Section = -0.38 Clopper Soil Loss, in -0.35-0.40-0.37 Avg Clopper Soil Loss per Cross-Section = -0.38

3-5 CHANNEL 3 - SHEAR STRESS 5 Date: 11/8/11 Start Time: 4:00 PM End Time: Soil: Loam Target Shear (psf): 4.00 Slope: 20% 40 ft long flume 20 ft test section RECP: ECP-3 Anchorage: 1900 rpms 2 ft wide flume TEST DATA 1 2 3 Inlet Weir Weir Channel Targets FLOW Water Depth, in 0.00 0.00 Weir width (ft) = 2.00 C = 0.00 Water Velocity, ft/s 0.00 0.00 0 ft A B C Flow Rate, cfs 0.00 0.00 0.00 52.42 Cross-section 1 A B C V @ 0.2d V @ 0.6d V @ 0.8d To Water Surf, cm To original Surface Elev, cm 56.9 57.4 56.4 24.16 24.8 To eroded Surface Elev, cm 58.1 58 57.5 Vavg (fps) = 24.16 Soil Loss / Gain, cm -1.2-0.6-1.1 navg = 0.029 Clopper Soil Loss, cm -1.2-0.6-1.1 Flow (cfs) = 52.42 13.45 13.02 2 ft Avg Bottom Loss/Gain, in -0.38 Avg Clopper Soil Loss, in -0.38 Cross-section 2 A B C V @ 0.2d V @ 0.6d V @ 0.8d To Water Surf, cm To original Surface Elev, cm 58 58.5 57 24.38 25.8 To eroded Surface Elev, cm 58.9 59.2 57.6 Vavg (fps) = 24.38 Soil Loss / Gain, cm -0.9-0.7-0.6 navg = 0.029 Clopper Soil Loss, cm -0.9-0.7-0.6 Flow (cfs) = 52.42 13.33 12.90 4 ft Avg Bottom Loss/Gain, in -0.29 Avg Clopper Soil Loss, in -0.29 Cross-section 3 A B C V @ 0.2d V @ 0.6d V @ 0.8d To Water Surf, cm To original Surface Elev, cm 60 59.1 58 24.68 27.5 To eroded Surface Elev, cm 61 60 58.6 Vavg (fps) = 24.68 Soil Loss / Gain, cm -1-0.9-0.6 navg = 0.028 Clopper Soil Loss, cm -1-0.9-0.6 Flow (cfs) = 52.42 13.16 12.74 6 ft Avg Bottom Loss/Gain, in -0.33 Avg Clopper Soil Loss, in -0.33 Cross-section 4 A B C V @ 0.2d V @ 0.6d V @ 0.8d To Water Surf, cm To original Surface Elev, cm 58 58 56.5 25.18 27.0 To eroded Surface Elev, cm 59 59.2 58 Vavg (fps) = 25.18 Soil Loss / Gain, cm -1-1.2-1.5 navg = 0.027 Clopper Soil Loss, cm -1-1.2-1.5 Flow (cfs) = 52.42 12.91 12.49 8 ft Avg Bottom Loss/Gain, in -0.49 Avg Clopper Soil Loss, in -0.49 Cross-section 5 A B C V @ 0.2d V @ 0.6d V @ 0.8d To Water Surf, cm To original Surface Elev, cm 58.5 59 57.5 25.36 27.8 To eroded Surface Elev, cm 59.6 59.7 58.6 Vavg (fps) = 25.36 Soil Loss / Gain, cm -1.1-0.7-1.1 navg = 0.027 Clopper Soil Loss, cm -1.1-0.7-1.1 Flow (cfs) = 52.42 12.81 12.40 10 ft Avg Bottom Loss/Gain, in -0.38 Avg Clopper Soil Loss, in -0.38 Cross-section 6 A B C V @ 0.2d V @ 0.6d V @ 0.8d To Water Surf, cm To original Surface Elev, cm 59 59.2 56.6 25.39 28.7 To eroded Surface Elev, cm 60.5 61.5 58.5 Vavg (fps) = 25.39 Soil Loss / Gain, cm -1.5-2.3-1.9 navg = 0.027 Clopper Soil Loss, cm -1.5-2.3-1.9 Flow (cfs) = 52.42 12.80 12.39 12 ft Avg Bottom Loss/Gain, in -0.75 Avg Clopper Soil Loss, in -0.75 Cross-section 7 A B C V @ 0.2d V @ 0.6d V @ 0.8d To Water Surf, cm To original Surface Elev, cm 59 59 57.5 26.02 29.3 To eroded Surface Elev, cm 60.1 60.9 59 Vavg (fps) = 26.02 Soil Loss / Gain, cm -1.1-1.9-1.5 navg = 0.026 Clopper Soil Loss, cm -1.1-1.9-1.5 Flow (cfs) = 52.42 12.49 12.09 14 ft Avg Bottom Loss/Gain, in -0.59 Avg Clopper Soil Loss, in -0.59 Cross-section 8 A B C V @ 0.2d V @ 0.6d V @ 0.8d To Water Surf, cm To original Surface Elev, cm 59 59.6 56.5 26.14 28.7 To eroded Surface Elev, cm 58.2 59.6 60 Vavg (fps) = 26.14 Soil Loss / Gain, cm 0.8 0-3.5 navg = 0.025 Clopper Soil Loss, cm 0 0-3.5 Flow (cfs) = 52.42 12.43 12.03 16 ft Avg Bottom Loss/Gain, in -0.35 Avg Clopper Soil Loss, in -0.46 Cross-section 9 A B C V @ 0.2d V @ 0.6d V @ 0.8d To Water Surf, cm To original Surface Elev, cm 58 58.7 56.6 26.17 29.4 To eroded Surface Elev, cm 59.7 60.8 59.3 Vavg (fps) = 26.17 Soil Loss / Gain, cm -1.7-2.1-2.7 navg = 0.025 Clopper Soil Loss, cm -1.7-2.1-2.7 Flow (cfs) = 52.42 12.42 12.02 18 ft Avg Bottom Loss/Gain, in -0.85 Avg Clopper Soil Loss, in -0.85 Cross-section 10 A B C V @ 0.2d V @ 0.6d V @ 0.8d To Water Surf, cm To original Surface Elev, cm 58 59.7 57.5 26.43 29.8 To eroded Surface Elev, cm 59.7 60.7 59.7 Vavg (fps) = 26.43 Soil Loss / Gain, cm -1.7-1 -2.2 navg = 0.025 Clopper Soil Loss, cm -1.7-1 -2.2 Flow (cfs) = 52.42 12.30 11.90 20 ft Avg Bottom Loss/Gain, in -0.64 Avg Clopper Soil Loss, in -0.64 Cross-section 11 A B C V @ 0.2d V @ 0.6d V @ 0.8d To Water Surf, cm To original Surface Elev, cm 59.2 60.2 58 26.48 31.0 To eroded Surface Elev, cm 60.9 62 60.6 Vavg (fps) = 26.48 Soil Loss / Gain, cm -1.7-1.8-2.6 navg = 0.025 3.8 pins / sy Stress (psf) Stress (psf) Stress (psf) Stress (psf) Stress (psf) Stress (psf) Stress (psf) Stress (psf) Stress (psf) Stress (psf) Stress (psf) Clopper Soil Loss, cm -1.7-1.8-2.6 Flow (cfs) = 52.42 12.27 11.88 Avg Bottom Loss/Gain, in -0.80 Avg Clopper Soil Loss, in -0.80 Soil Loss / Gain, in -0.43-0.47-0.69 Avg Bottom Loss/Gain per Cross-Section = -0.53 Clopper Soil Loss, in -0.46-0.47-0.69 Avg Clopper Soil Loss per Cross-Section = -0.54

Sample Period & Date (Plots Started: 8/18/10) Channel Product Vegetation Count 6-Week Vegetated ECP-3 Zone # Stems Stems/ft 2 Blades* # Ht. Avg., in. Sample Vegetation Count Period & Channel 1-Year Vegetated Date (Plots Product ECP3 % of Started: # Initial 9/14/10) Zone # Stems Stems / ft 2 Blades* Ht. Avg., in. % of Initial 1 18 281.6 88 5.5 1 30 486.4 152 6.0 Initial - 9/29/10 After Shear #1-9/29/10 After Shear #2-9/29/10 After Shear #3-9/29/10 After Shear #4-10/1/10 After Shear #5-0/0/10 2 17 275.2 86 8.0 Initial - 2 28 448 140 6.0 3 16 262.4 82 6.0 10/18/11 3 32 508.8 159 6.0 Avg 17 273 85 6.5 100.0% Avg 30 481 150 6.0 100.0% 1 17 272 85 5.5 1 28 448 140 6.0 2 17 265.6 83 8.0 After Shear #1-2 26 422.4 132 6.0 3 15 246.4 77 6.0 10/18/11 3 28 451.2 141 6.0 Avg 16 261 82 6.5 95.7% Avg 28 441 138 6.0 91.6% 1 16 256 80 5.5 1 26 412.8 129 6.0 2 16 252.8 79 8.0 After Shear #2-2 25 400 125 6.0 3 14 227.2 71 6.0 10/18/11 3 27 438.4 137 6.0 Avg 15 245 77 6.5 89.8% Avg 26 417 130 6.0 86.7% 1 13 211.2 66 5.5 1 27 438.4 137 6.0 2 12 192 60 8.0 After Shear #3-2 14 224 70 6.0 3 10 163.2 51 6.0 10/18/11 3 12 188.8 59 6.0 Avg 12 189 59 6.5 69.1% Avg 18 284 89 6.0 59.0% 1 7 105.6 33 5.5 1 19 307.2 96 6.0 2 6 92.8 29 8.0 After Shear #4-2 0 0 0 6.0 3 4 70.4 22 6.0 10/18/11 3 0 0 0 6.0 Avg 6 90 28 6.5 32.8% Avg 6 102 32 6.0 21.3% 1 0 0 1 6 89.6 28 6.0 2 0 0 After Shear #5-2 0 0 0 0.0 3 0 0 11/8/11 3 0 0 0 0.0 Avg 0 0 #DIV/0! #DIV/0! 0.0% Avg 2 30 9 2.0 6.2% Sample Area: 3" x 3" = 0.0625 ft 2 Sample Area: 3" x 3" = 0.0625 ft 2