Large-Scale Slope Erosion Testing (ASTM D 6459) of · 2016-04-22 · Large-Scale Slope Erosion...

Large-Scale Slope Erosion Testing

(ASTM D 6459)

of

US Erosion Control Products’

US-2S, Double Net Straw Blanket

over

Loam

June 2012

Submitted to:

AASHTO/NTPEP

444 North Capitol Street, NW, Suite 249

Washington, D.C. 20001

Attn: Evan Rothblatt, NTPEP

[email protected]

Submitted by:

TRI/Environmental, Inc.

9063 Bee Caves Road

Austin, TX 78733

C. Joel Sprague

Project Manager

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Amended April 2016 - See Appendix E

June 30, 2012

Mr. Evan Rothblatt AASHTO/NTPEP

444 North Capitol Street, NW, Suite 249

Washington, D.C. 20001

E-mail: [email protected]

Subject: Large-scale Slope Testing over Loam of US-2S, Double Net Straw Blanket, manufactured

in Willacoochee, GA

Dear Mr. Rothblatt:

This letter report presents the results for large-scale slope erosion tests performed on US-2S, Double

Net Straw Blanket, rolled erosion control product (RECP), over loam. Included are data developed

for target rainfall intensities from 2 to 6 in/hr (5 to 15 cm/hr). All testing work was performed in

general accordance with the ASTM D 6459, Standard Test Method for Determination of Rolled

Erosion Control Product (RECP) Performance in Protecting Hillslopes from Rainfall-Induced

Erosion. Generated results were used to develop the following general cover factor (C-Factor) for

the tested material:

C-Factor US-2S, Double Net Straw Blanket & 1.2 staples/sy = 0.015 for cumulative R-Factor < 231;

Eqn: C = 0.0000000029R3 - 0.0000007396R

2 + 0.0000777678R

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

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US-2S, Double Net Straw Blanket, over Loam

Slope Erosion Testing for NTPEP

June 30, 2012

2

SLOPE TESTING REPORT

US-2S, Double Net Straw Blanket, over Loam TESTING EQUIPMENT AND PROCEDURES

Overview of Test and Apparatus

TRI/Environmental, Inc.'s (TRI's) large-scale slope 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 reported herein was performed in accordance with ASTM D 6459, on 3:1 slopes

using loamy soil test plots measuring 40 ft long x 8 ft wide. The simulated rainfall was produced by

ten “rain trees” arranged around the perimeter of each test slope. Each rain tree has four sprinkler

heads atop a 15 ft riser pipe. The rainfall system has been calibrated prior to testing to determine the

number of sprinkler heads and associated pressure settings necessary to achieve target rainfall

intensities and drop sizes. The target rainfall intensities are 2, 4, and 6 in/hr and are applied in

sequence for 20 minutes each. Three replicate test slopes covered by the same rolled erosion control

product (RECP) submitted were tested. The erosion resistance provided by the product tested is

obtained by comparing the protected slope results to control (bare soil) results. Tables and graphs of

rainfall 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 products.

Table 1. Tested Product Information & Index Properties

Product Information and Index Property / Test Units Sampled Product

Product Identification - US-2S

Manufacturer - US Erosion Control Products

Manufacturing Plant Location - Willacoochee, GA

Lot numbers of samples - #2-52412-153, #2-52412-

154, #2-52512-32

Fiber - Wheat Straw

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 9.3 x 12.6

Tensile Elongation MD x XD (ASTM D 6818)* % 26.1 x 32.9

Thickness (ASTM D 6525)* mils 410

Light Penetration (ASTM D 6567)* % cover 90.8

Water Absorption (ASTM D 1117 & ECTC-TASC 00197)* % Wt Change 438

Mass / Unit Area (ASTM D 6475)* oz/sy 8.38 * Values from Independent Testing of Randomly Sampled Product



June 30, 2012

3

Test Soil

The test soil used in the test plots had the following characteristics.

Table 2. TRI-Loam Characteristics

Soil Characteristic Test Method Value

% Gravel

ASTM D 422

0

% Sand 45

% Silt 35

% Clay 20

Liquid Limit, % ASTM D 4318

41

Plasticity Index, % 8

Soil Classification USDA Loam

Soil Classification USCS Sandy silty clay (ML-CL)

Preparation of the Test Slopes

The test slopes undergo a “standard” preparation procedure prior to each slope test. First, any rills or

depressions resulting from previous testing are filled in with test soil and subject to heavy

compaction. The entire test plot is then tilled to a depth not less than four inches. The test slope is

then raked to create a slope that is smooth both side-to-side and top-to-bottom. Finally, a steel drum

roller is rolled down-and-up the slope 3 times proceeding from one side of the plot to the other. The

submitted erosion control product is then installed as directed by the client.

Installation of Erosion Control Product on Test Slopes

As noted, the submitted erosion control product was installed as directed by the client. For the tests

reported herein, the RECP was anchored with 6-inch staples at 1.2 staples per square yard.

Specific Test Procedure

Immediately prior to testing, rain gauges are placed at the quarter points (i.e. 10, 20, 30 ft) on the

slope. The slope is then exposed to sequential 20-minute rainfalls having target intensities of 2, 4,

and 6 inches per hour. All runoff is collected during the testing. Additionally, periodic sediment

concentration grab samples are taken and runoff rate measurements are made. Between rainfall

intensities, the rainfall is stopped and rainfall depth is read in the three rain gauges, valves are

adjusted to facilitate the subsequent rainfall intensity, and empty collection vessels are positioned to

collect subsequent runoff.

After allowing for sediments to settle, water is decanted from the collected runoff. The remaining

solids are used to determine “bulk” soil loss. Bulk soil loss is measured by drying all collected

sediments.



June 30, 2012

4

Figure 1. Rainfall Testing Facility

(set up for a control run)

Figure 2. Typical Sampling

Figure 3. Typical Control Result

Pictures of slopes prepared for testing are shown in Figure 4.

Figure 4. Typical Prepared Soil Slope & RECP Installation

Pictures of the eroded slopes are shown in Figures 5 thru 7.



June 30, 2012

5

Figure 5a. Test Slope #1 –

Start of the 2 in/hr Event

Figure 5b. Test Slope #1 –

End of the 4 in/hr Event

Figure 5c. Test Slope #1 –

End of 6 in/hr Even

Figure 5d. Test Slope #1 –

RECP Removed (typical)


Start of the 2 in/hr Event





June 30, 2012

6


End of 6 in/hr Event




Start of 2 in/hr Event




End of 6 in/hr Event





June 30, 2012

7

TEST RESULTS

The Cover Management (C) Factor from the Revised Universal Soil Loss Equation (RUSLE) of the

USDA-ARS Agricultural handbook 703 is the reported performance measure for slopes determined

from this testing. The C-Factor and R-Factor reported herein are related through RUSLE by the

following relationship:

A = R x K x LS x C x P

where: A = the computed soil loss in tons per acre (measured/calculated from test);

R = the rainfall erosion index (measured/calculated from test);

K = the erodibility of the soil (calculated from test – see Figure 9);

LS = the topographic factor (2.78 for 8 x 40 ft slope);

C = the cover factor = ratio of protect soil loss to control soil loss (1.0 for control); and

P = the practice factor (1.0 for all test slopes).

Total soil loss and the associated rainfall depth measured during the testing are the principle data

used to determine the C Factor. The cumulative C-Factors shown in Table 3 are the ratio of the soil

loss from the protected condition at a calculated cumulative R-Factor divided by the cumulative soil

loss from the control plot (Figure 9) at that same R-Factor.

In all cases, the soil loss and associated rainfall data for both protected and control conditions are

used to develop a normalized cumulative graph of R-Factor versus C-Factor (R factor = total kinetic

energy of the storm (E) times its maximum 30-minute Intensity (I)).

The maximum average normalized cumulative R-Factor calculated for the target test events: 2 in/hr

for 20 minutes + 4 in/hr for 20 minutes + 6 in/hr for 20 minutes, is R = 231. The C-Factor associated

with this normalized maximum average result is the reported performance value. This facilitates

product-to-product comparison of test results at a common point of the storm event.

Graphs of R-Factor versus C-Factor for the protected condition and Soil Loss versus R-Factor for the

control condition are shown in Figures 8 and 9, respectively. Figure 8 includes the best regression

line fit to the test data to facilitate the determination of the C-factor. Figure 8 additionally allows

users of this report to evaluate performance at other points in the model storm by selecting the R

factor (and the corresponding C Factor) that may fit local conditions.

According to the test procedure ASTM D6459, a test may be stopped in the event of catastrophic soil

loss, as determined by the lab. AASHTO NTPEP ECP Panel has determined this practice places an

undue amount of subjectivity into the test. In lieu of stopping the test, the test is run to completion.

The runoff and sediment loss just prior to catastrophic failure is separated from that occurring after.

This additional point is used in the creating of the Soil Loss verses R Factor Graph.

The tests reported herein did not experience catastrophic slope failure. Linear (R2=0.96), power

(R2= 0.89), and polynomial (R

2 = 0.99) fits were evaluated.

The overall C-Factor information shown in Table 4 is derived from Figure 8 which relates the C-

Factors and associated R-Factors given in Table 3.



June 30, 2012

8

Table 3. Summary Data Table – Protected Slopes

Slope # &

Product

Test #

(run # -

target

intensity)

Intensity

(in/hr)

Runoff

(gallons)

Cumm.

R-Factor

Soil Loss

(lbs/plot/event)

Cumm. Soil

Loss

(Tons/Acre)

Control Soil

Loss at Cumm.

R-Factor

(Tons/Acre)

Cumm.

C-Factor

1 – US-2S,

Double Net

Straw Blanket

1-2 2.09 1.18 10.09 0.020 0.001 2.372 0.0006

1-4 4.06 119.46 74.64 0.500 0.035 17.547 0.0020

1-6 6.10 226.09 240.00 12.600 0.893 56.423 0.0158

2 – US-2S,

Double Net

Straw Blanket

2-2 2.13 4.80 10.50 0.030 0.002 2.469 0.0008

2-4 4.09 136.40 76.54 0.850 0.060 17.995 0.0033

2-6 6.02 219.28 238.36 13.400 0.972 56.038 0.0173

3 – US-2S,

Double Net

Straw Blanket

3-2 2.09 2.20 10.09 0.050 0.003 2.372 0.0014

3-4 4.06 130.67 74.64 0.780 0.056 17.547 0.0032

3-6 6.14 249.28 241.94 13.200 0.955 56.879 0.0168

Table 4. Overall C-Factor

Product C-Factor Calculation

US-2S, Double Net Straw Blanket &

1.2 staples/sy 0.015

C = 0.0000000029R3 -

0.0000007396R2 + 0.0000777678R

y = 0.0000000029x3 - 0.0000007396x2 + 0.0000777678xR² = 0.9920964920

0.000

0.002

0.004

0.006

0.008

0.010

0.012

0.014

0.016

0.018

0.020

0 20 40 60 80 100 120 140 160 180 200 220 240 260 280

C-F

acto

r

R-Factor

C-Factor vs. R-Factor(US-2S @ 1.2 staples/sy on TRI-Loam; 3:1 Slope)

2 + 4 + 6 in/hr:R = 231C = 0.0000000029R3 - 0.0000007396R2 + 0.0000777678R

CR=231 = 0.015

Figure 8. R-Factor vs. C-Factor – Tested Product

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June 30, 2012

9

y = 0.2351xR² = 0.9499

0.00

10.00

20.00

30.00

40.00

50.00

60.00

70.00

0 50 100 150 200 250 300 350

So

il L

os

s (

T/A

)

RUSLE R (US Customary Units)

Soil Loss vs RUSLE R (Control Testing of TRI-Loam; 3:1 Slope)

Slope 1 - 10/29/09

Slope 2 - 8/17/09

Slope 3 - 10/29/09

Slope 1 - 4/16/10

Slope 2 - 4/16/10

Slope 3 - 4/8/10

Slope 1 - 4/21/10

Slope 2 - 4/23/10

Slope 3 - 4/23/10

Slope 1 - 8/6/10

Slope 2 - 8/6/10

Slope 3 - 8/6/10

Slope 1 - 11/3/10

Slope 2 - 11/3/10

Slope 3 - 11/3/10

Slope 3 - 3/22/11

Slope 1 - 6/16/11

Slope 2 - 6/16/11

Slope 3 - 6/16/11

Slope 1 - 12/15/11

Slope 2 - 12/15/11

Slope 3 - 12/16/11

Slope 1 - 1/25/12

Slope 2 - 1/25/12

Slope 3 - 1/25/12

Slope 1 - 4/30/12

Slope 2 - 4/30/12

Slope 3 - 4/30/12

all slopes

Linear (all slopes)

From RUSLE:A = R K LS C P

For Control: LS = 2.78; P = 1.0; C = 1.0K = (A/R) / 2.78 = m / 2.78K = 0.2351 / 2.78 = 0.085

The cummulative R-Factor calculated for the following events: 2 in/hr for 20 min + 4 in/hr for 20 min + 6 in/hr for 20 min, is R = 231 and the associated soil loss is 54.2 tons/acre

Figure 9. R-Factor vs. Soil Loss – Control Tests

US-2S, Double Net StrawBlanket, over Loam


June 30, 2012

Appendix

APPENDIX A – RECORDED DATA

Test Record Sheets

Sediment Concentration Data

Runoff Data

Soil Moisture Content

Soil Loss Tables

# Time

Start Rain: 11:10 AM 1 11:13 XSampling

interval: 0:03 2 11:16 X

Rain Time (min): 20.00 Test Time (min): 20.00 3 11:19 X

Descr:. Double Net Straw Blanket 4 11:22 X

Anchors: 6 in Staples Anchorage: 1.2 / sy 5 11:25 X

6 11:28 X

wc1 = 19.5% 7

d = 17 mm 8

i = 2.01 in/hr P = 9 psi 9

10

x 11

B P = 9 psi X 10

x x 13

X P = 9 psi C x 14

x x 15

x D P = 9 psi X 10

x x 13

X P = 9 psi E x 14

x x 15

x F P = 9 psi X

x x

x P = 9 psi G x # Time

Time to Collect 1

gal, sec

X x 1 3 1020

x H P = 9 psi x 2

x X 3

x P = 9 psi I x 4

X x 5

X J P = 9 psi x 6

X 7

X 8

d = 19 mm 9

i = 17.00 in/hr Temp. 82 deg 10

wc3 = 18.1% Hum. 87 % 11

d = 17 in 10

i = 2.01 in/hr Average Depth: in. 13

wc2 = 17.3% Avg Rainfall Intensity: in/hr 14

15

10

13

14

15

Sediment Concentration Grab

Samples Followed by Runoff Rate

Measurements

Runoff Rate Measurements

TOP OF SLOPE

End Rain: 11:30 AM

(circle "x" for open valves)

End Runoff:

US-2S

A

DDRF Rainfall Testing

11:30 AM

x X x x

Roll#: 0000884

Date:

Product:

11-Jun-12

Set system pressure to 16

psi.

Notes:

0 mph breeze.

Approx 1 gal collected.

0.70

2.09

Slope #: 1 Target Rain: 2 in/hr

SLOPE #1

# Time

Start Rain: 1 11:38 XSampling

interval: 0:02 2 11:40 X




6 11:48 X

wc1 = 19.5% 7 11:50 X

d = 33 mm 8 11:52 X

i = 3.90 in/hr P = 9 psi 9 11:54 X

10 11:56 X

X 11

B P = 9 psi X 10

X x 13

X P = 9 psi C x 14

x X 15

x D P = 9 psi X 10

X x 13

X P = 9 psi E x 14

x X 15

x F P = 9 psi X

x x


Time to Collect 1

gal, sec

X x 1 2 57

X H P = 9 psi x 2 4 17

x X 3 6 11

X P = 9 psi I X 4 8 10

X x 5 10 9

X J P = 9 psi X 6 12 9

X 7 14 9

X 8 16 9

d = 35 mm 9 18 9

i = 4.13 in/hr Temp. 85 deg 10 20 9

wc3 = 18.1% Hum. 88 % 11

d = 35 mm 10



15

10

13

14

15


X X x x


11:59 AM

A


11-Jun-12

Roll#: 0000884

Product: US-2S

End Runoff:

TOP OF SLOPE


psi.



Measurements

Date:

SLOPE #1


End Rain: 11:56 AM11:36 AM

Notes:

0 mph breeze. Approx 120 gal collected.

1.35

4.06

# Time

Start Rain: 12:03 PM 1 12:05 XSampling

interval: 0:02 2 12:07 X




6 12:15 X

wc1 = 19.5% 7 12:17 X

d = 51 mm 8 12:19 X

i = 6.02 in/hr P = 9 psi 9 12:21 X

10 12:23 X

X 11

B P = 9 psi X 10

X X 13

X P = 9 psi C x 14

X X 15

x D P = 9 psi X 10

X X 13

X P = 9 psi E x 14

X X 15

x F P = 9 psi X

x X

X P = 9 psi G x # Time

Time to Collect 1

Gallon, sec

X x 1 2 8

X H P = 9 psi X 2 4 6

X X 3 6 7

X P = 9 psi I X 4 8 6

X X 5 10 6

X J P = 9 psi X 6 12 6

X 7 14 6

X 8 16 6

d = 52 mm 9 18 6

i = 6.14 in/hr Temp. 79 deg 10 20 5

wc3 = 18.1% Hum. 88 % 11

d = 52 mm 10



15

10

13

14

15

Notes:

0 mph breeze.


2.03

6.10


TOP OF SLOPE

End Rain: 12:23 PM

A

X X X x


12:28 PM



Measurements


Date: 11-Jun-12


SLOPE #1

Roll#:

End Runoff:

Product: US-2S

0000884


psi.

# Time


interval: 0:03 2 12:36 X




6 12:48 X

wc1 = 19.7% 7

d = 17 mm 8

i = 2.01 in/hr P = 9 psi 9

10

x 11

X P = 9 psi B 10

x x 13

x C P = 9 psi X 14

x x 15

X P = 9 psi D x 10

x x 13

x E P = 9 psi X 14

x x 15

X P = 9 psi F x

x x

x G P = 9 psi x # Time

Time to Collect 1

Gallon, sec

x X 1 3 720

x P = 9 psi H x 2 15 95

X x 3 18 55

x I P = 9 psi x 4

x X 5

x P = 9 psi J X 6

X 7

X 8

d = 20 mm 9

i = 2.36 in/hr Temp. 81 deg 10

wc2 = 17.3% Hum. 89 % 11

d = 17 mm 10



15

10

13

14

15

11-Jun-12


psi.


Date:

SLOPE #2

12:52 PM

Product:

Roll#:

US-2S

0000886

x x X x

Notes:

0 mph breeze from the .


0.71

2.13



Measurements


TOP OF SLOPE

End Rain: 12:50 PM

Slope #: 2

A

Target Rain: 2 in/hr


End Runoff:

# Time


interval: 0:02 2 12:59 X




6 13:07 X

wc1 = 19.7% 7 13:09 X

d = 38 mm P = 9 psi 8 13:11 X

i = 4.49 in/hr 9 13:13 X

X 10 13:15 X

X P = 9 psi B 11

x X 10

x C P = 9 psi X 13

X x 14

X P = 9 psi D x 15

x X 10

x E P = 9 psi X 13

x x 14

X P = 9 psi F x 15

X x

x G P = 9 psi X

x X # Time

Time to Collect 1

Gallon, sec

x P = 9 psi H x 1 2 17

X x 2 4 9

X I P = 9 psi X 3 6 10

x X 4 8 9

X P = 9 psi J X 5 10 9

X 6 12 9

X 7 14 9

d = 36 mm 8 16 8

i = 4.25 in/hr 9 18 10

wc2 = 17.3% Temp. 81 deg 10 20 10

d = 30 mm Hum. 89 % 11

i = 3.54 in/hr 10

wc3 = 20.6% Average Depth: in. 13

Avg Rainfall Intensity: in/hr 14

15

10

13

14

15


TOP OF SLOPE

End Rain: 1:15 PM

End Runoff: 1:19 PM

X X x xSet system pressure to 16

psi.

A

DDRF Rainfall Testing Sediment Concentration Grab


Measurements

Date:

SLOPE #2


11-Jun-12

Roll#:

Product: US-2S

0000886

Notes:

0 mph breeze. Approx. 138 gal collected.

1.36

4.09

# Time


interval: 0:02 2 13:23 X




6 13:31 X

wc1 = 19.7% 7 13:33 X

d = 52 mm 8 13:35 X

i = 6.14 in/hr P = 9 psi 9 13:37 X

10 13:39 X

X 11

X P = 9 psi B 10

X X 13

x C P = 9 psi X 14

X X 15

X P = 9 psi D x 10

X X 13

x E P = 9 psi X 14

X X 15

X P = 9 psi F x

X x

x G P = 9 psi X # Time

Time to Collect 1

Gallon, sec

x X 1 2 7

X P = 9 psi H X 2 4 6

X X 3 6 6

X I P = 9 psi X 4 8 6

X X 5 10 6

X P = 9 psi J X 6 12 6

X 7 14 6

X 8 16 6

d = 51 mm 9 18 6

i = 6.02 in/hr Temp. 81 deg 10 20 5

wc2 = 17.3% Hum. 87 % 11

d = 50 mm 10



15

10

13

14

15

0000886



Measurements


TOP OF SLOPE

End Rain: 1:39 PM


Date:

Product:

Roll#:

Notes:

0 mph breeze.


2.01

6.02

X X X x


psi.


End Runoff: 1:42 PM

SLOPE #2

11-Jun-12


A

US-2S

# Time X

Start Rain: 1:48 PM 1 13:51 X

Sampling

interval: 0:03 2 13:54 X




6 14:06 X

wc1 = 19.5% 7

d = 17.00 mm 8

i = 2.01 in/hr P = 9 psi 9

10

x 11

B P = 9 psi X 10

x x 13

X P = 9 psi C x 14

x x 15

x D P = 9 psi X 10

x x 13

X P = 9 psi E x 14

x x 15

x F P = 9 psi X

x x


Time to Collect 1

Gallon, sec

X x 1 3 900

x H P = 9 psi x 2 18 120

x X 3

x P = 9 psi I x 4

X x 5

X J P = 9 psi x 6

X 7

X 8

d = 17.00 mm 9

i = 2.01 in/hr * Temp. 83 deg 10

wc3 = 19.1% Hum. 84 % 11

d = 19.00 mm 10



15

11-Jun-12

US-2S

0000885

Notes:

0 mph breeze from the .


Roll#:

2.09

0.70




Measurements

End Rain:


Slope #: 3

Date:

Product:

SLOPE #3

Target Rain: 2 in/hr


2:08 PM

End Runoff: 2:09 PM

A

x X x x

TOP OF SLOPE


psi.

# Time

Start Rain: 1 14:15 XSampling

interval: 0:02 2 14:17 X




6 14:25 X

wc1 = 19.5% 7 14:27 X

d = 31 mm 8 14:29 X

i = 3.66 in/hr P = 9 psi 9 14:31 X

10 14:33 X

X 11

B P = 9 psi X 10

X x 13

X P = 9 psi C x 14

x X 15

x D P = 9 psi X 10

X x 13

X P = 9 psi E x 14

x X 15

x F P = 9 psi X

x x


Time to Collect 1

Gallon, sec

X x 1 2 13

X H P = 9 psi x 2 4 12

x X 3 6 10

X P = 9 psi I X 4 8 10

X x 5 10 10

X J P = 9 psi X 6 12 10

X 7 14 9

X 8 16 9

d = 33 mm 9 18 9

i = 3.90 in/hr Temp. 84 deg 10 20 9

wc3 = 19.1% Hum. 85 % 11

d = 39 mm 10



15


2:33 PM

Notes:

0 mph breeze.


1.35

4.06

Date:



Measurements

End Runoff: 2:36 PM


SLOPE #3


TOP OF SLOPE

Product:

Roll#:


11-Jun-12 End Rain:2:13 PM


psi.

US-2S

0000885

X X x x

A

# Time

Start Rain: 1 14:43Sampling

interval: 0:02 2 14:45

Rain Time (min): 20.00 Test Time (min): 24.00 3 14:47

Descr:. Double Net Straw Blanket 4 14:49

Anchors: 6 in Staples Anchorage: 1.2 / sy 5 14:51

6 14:53

wc1 = 19.5% 7 14:55

d = 51 mm 8 14:57

i = 6.02 in/hr P = 9 psi 9 14:59

10 15:01

X 11

B P = 9 psi X 10

X X 13

X P = 9 psi C x 14

X X 15

x D P = 9 psi X 10

X X 13

X P = 9 psi E x 14

X X 15

x F P = 9 psi X

x X

X P = 9 psi G x # Time

Time to Collect 1

Gallon, sec

X x 1 2 7

X H P = 9 psi X 2 4 6

X X 3 6 6

X P = 9 psi I X 4 8 5

X X 5 10 5

X J P = 9 psi X 6 12 5

X 7 14 5

X 8 16 5

d = 53 mm 9 18 5

i = 6.26 in/hr Temp. 84 deg 10 20 5

wc3 = 19.1% Hum. 87 % 11

d = 52 mm 10



15

10

13

14

15

11-Jun-12

US-2S

0000884



Measurements


TOP OF SLOPE

End Rain: 3:01 PM

3:05 PMEnd Runoff:

(circle "x" for open valves)Set system pressure to 16

psi.X X X x


Date:

SLOPE #3


Notes:

0 mph breeze.


2.05

6.14

Product:

Roll#:

A

2:41 PM

Sample

Number

Test

Time,

minutes

Total

Weight, g

Decanted

Weight, g

Dry

Weight, g

Bottle

Weight, g

Dry

Sediment

Weight,

mg

Total

Collected

Water Wt.,

g

Total

Collected

Volume of

Water, l

Sediment

Concentration,

mg/l

Runoff

Sampling

Time

Time to

Collect 1

gal

Associated

Runoff, gal

Associated

Sediment

Conc, mg/l

Associated

Solids Loss,

lbs

2.09 in/hr avg

11-Jun-12 2-1 3.00 163.99 150.97 149.67 149.66 10.00 14.32 0.01 698.32 3.00 1020 1.18 2220.17 0.02

2-2 6.00 173.35 151.17 149.51 149.50 10.00 23.84 0.02 419.46 0.00 0 0.00 0.00

2-3 9.00 169.78 150.93 149.36 149.32 40.00 20.42 0.02 1958.86 0.00 0 0.00 0.00

2-4 10.00 162.57 151.03 149.98 149.89 90.00 12.59 0.01 7148.53 0.00 0 0.00 0.00

2-5 15.00 174.71 152.60 151.23 151.20 30.00 23.48 0.02 1277.68 0.00 0 0.00 0.00

2-6 18.00 172.34 152.69 150.34 150.30 40.00 22.00 0.02 1818.18 0.00 0 0.00 0.00

0.00 AVG = 2220.17 0.00 0 0.00 1818.18 0.00

4.06 in/hr avg 0.00 Total Solids Lost: 0.02

11-Jun-12 4-1 2.00 225.89 151.30 149.75 148.21 1540.00 76.14 0.08 20225.90 2.00 57 3.11 20225.90 0.00

4-2 4.00 328.61 153.63 151.26 151.20 60.00 177.35 0.18 338.31 4.00 17 4.71 338.31 0.01

4-3 6.00 338.07 151.09 149.15 149.08 70.00 188.92 0.19 370.53 6.00 11 10.36 370.53 0.03

4-4 8.00 336.96 151.33 149.33 149.32 10.00 187.63 0.19 53.30 8.00 10 11.90 53.30 0.01

4-5 10.00 333.74 153.95 150.44 150.42 20.00 183.30 0.18 109.11 10.00 9 13.22 109.11 0.01

4-6 10.00 340.30 153.29 151.70 151.57 130.00 188.60 0.19 689.29 12.00 9 13.33 689.29 0.08

4-7 14.00 332.32 153.33 151.81 151.69 120.00 180.51 0.18 664.78 14.00 9 13.33 664.78 0.07

4-8 16.00 329.31 153.53 149.31 149.13 180.00 180.00 0.18 1000.00 16.00 9 13.33 1000.00 0.11

4-9 18.00 362.12 152.26 150.80 150.61 190.00 211.32 0.21 899.11 18.00 9 13.33 899.11 0.10

4-10 20.00 320.90 152.69 150.68 150.51 170.00 170.22 0.17 998.71 20.00 9 13.33 998.71 0.11

AVG = 2506.29 23.00 0 9.50 998.71 0.08

6.10 in/hr avg Total Solids Lost: 0.64

11-Jun-12 6-1 2.00 357.17 152.52 151.94 150.74 1200.00 205.23 0.21 5847.10 2.00 8.00 16.00 5847.10 0.78

6-2 4.00 350.70 152.02 150.97 149.33 1640.00 199.73 0.20 8211.08 4.00 6.00 19.67 8211.08 1.35

6-3 6.00 345.32 149.97 148.64 147.46 1180.00 196.68 0.20 5999.59 6.00 7.00 17.29 5999.59 0.87

6-4 8.00 325.68 148.41 147.55 146.35 1200.00 178.13 0.18 6736.65 8.00 6.00 19.83 6736.65 1.11

6-5 10.00 333.74 153.21 152.94 151.49 1450.00 180.80 0.18 8019.91 10.00 6.00 20.00 8019.91 1.34

6-6 10.00 348.78 152.59 151.73 150.37 1360.00 197.05 0.20 6901.80 12.00 6.00 20.00 6901.80 1.15

6-7 14.00 345.48 152.42 149.53 148.35 1180.00 195.95 0.20 6021.94 14.00 6.00 20.00 6021.94 1.00

6-8 16.00 359.97 151.49 150.95 149.59 1360.00 209.02 0.21 6506.55 16.00 6.00 20.00 6506.55 1.09

6-9 18.00 351.77 150.38 149.71 148.17 1540.00 202.06 0.20 7621.50 18.00 6.00 20.00 7621.50 1.27

6-10 20.00 351.06 152.48 151.31 150.21 1100.00 199.75 0.20 5506.88 20.00 5.00 23.80 5506.88 1.09

AVG = 6737.30 25.00 0.00 29.50 5506.88 1.36

Total Solids Lost: 12.41

Slope #1 - Sediment Concentration

Sample

Number

Test

Time,

minutes

Total

Weight, g

Decanted

Weight, g

Dry

Weight, g

Bottle

Weight, g

Dry

Sediment

Weight,

mg

Total

Collected

Water Wt.,

g

Total

Collected

Volume of

Water, l

Sediment

Concentration,

mg/l

Runoff

Sampling

Time

Time to

Collect 1

gal

Associated

Runoff, gal

Associated

Sediment

Conc, mg/l

Associated

Solids Loss,

lbs

2.13 in/hr avg

11-Jun-12 2-1 3.00 160.86 151.74 150.74 150.74 0.00 10.12 0.01 0.00 3.00 720 1.25 828.37 0.01

2-2 6.00 169.36 151.40 149.79 149.76 30.00 19.57 0.02 1532.96 15.00 95 1.00 2386.04 0.02

2-3 9.00 54.91 31.59 26.80 26.77 30.00 28.11 0.03 1067.24 18.00 55 2.55 1859.39 0.04

2-4 10.00 175.61 149.47 147.57 147.55 20.00 28.04 0.03 713.27 0.00 0 0.00 0.00

2-5 15.00 229.46 151.61 149.83 149.64 190.00 79.63 0.08 2386.04 0.00 0 0.00 0.00

2-6 18.00 139.94 31.97 27.00 26.79 210.00 112.94 0.11 1859.39 0.00 0 0.00 0.00

AVG = 1259.82 0.00 0 0.00 1859.39 0.00


11-Jun-12 4-1 2.00 243.95 148.11 146.03 145.96 70.00 97.92 0.10 714.87 2.00 17 8.06 714.87 0.05

4-2 4.00 337.45 153.34 150.85 150.80 50.00 186.60 0.19 267.95 4.00 9 12.44 267.95 0.03

4-3 6.00 339.12 149.63 149.92 149.76 160.00 189.20 0.19 845.67 6.00 10 12.10 845.67 0.09

4-4 8.00 331.17 148.24 146.21 146.14 70.00 184.96 0.18 378.46 8.00 9 13.22 378.46 0.04

4-5 10.00 324.05 149.62 147.56 147.48 80.00 176.49 0.18 453.28 10.00 9 13.33 453.28 0.05

4-6 10.00 329.05 151.43 151.70 151.65 50.00 177.35 0.18 281.93 12.00 9 13.33 281.93 0.03

4-7 14.00 326.46 150.55 148.77 148.65 120.00 177.69 0.18 675.33 14.00 9 13.33 675.33 0.08

4-8 16.00 302.26 151.98 151.31 151.23 80.00 150.95 0.15 529.98 16.00 8 14.88 529.98 0.07

4-9 18.00 336.95 152.50 150.77 150.52 250.00 186.18 0.19 1342.79 18.00 10 12.20 1342.79 0.14

4-10 20.00 324.99 149.45 147.95 147.65 300.00 177.04 0.18 1694.53 20.00 10 12.00 1694.53 0.17

AVG = 718.48 24.00 0 11.50 1694.53 0.16


11-Jun-12 6-1 2.00 357.39 152.93 152.60 151.13 1470.00 204.79 0.20 7178.08 2.00 7.00 18.14 7178.08 1.09

6-2 4.00 322.74 148.62 147.69 146.65 1040.00 175.05 0.18 5941.16 4.00 6.00 19.83 5941.16 0.98

6-3 6.00 329.76 149.87 148.91 147.83 1080.00 180.85 0.18 5971.80 6.00 6.00 20.00 5971.80 1.00

6-4 8.00 343.74 149.58 148.84 147.79 1050.00 194.90 0.19 5387.38 8.00 6.00 20.00 5387.38 0.90

6-5 10.00 339.60 153.23 152.35 149.56 2790.00 187.25 0.19 14899.87 10.00 6.00 20.00 14899.87 2.49

6-6 10.00 346.40 151.36 151.51 149.45 2060.00 194.89 0.19 10570.07 12.00 6.00 20.00 10570.07 1.76

6-7 14.00 352.23 152.45 152.51 151.15 1360.00 199.72 0.20 6809.53 14.00 6.00 20.00 6809.53 1.14

6-8 16.00 344.20 152.57 151.79 150.54 1250.00 192.41 0.19 6496.54 16.00 6.00 20.00 6496.54 1.08

6-9 18.00 336.65 152.72 151.68 150.42 1260.00 184.97 0.18 6811.92 18.00 6.00 20.00 6811.92 1.14

6-10 20.00 367.05 150.81 150.74 149.43 1310.00 216.31 0.22 6056.12 20.00 5.00 23.80 6056.12 1.20

AVG = 7612.25 23.00 0 17.50 6056.12 0.88



Sample

Number

Test

Time,

minutes

Total

Weight, g

Decanted

Weight, g

Dry

Weight, g

Bottle

Weight, g

Dry

Sediment

Weight,

mg

Total

Collected

Water Wt.,

g

Total

Collected

Volume of

Water, l

Sediment

Concentration,

mg/l

Runoff

Sampling

Time

Time to

Collect 1

gal

Associated

Runoff, gal

Associated

Sediment

Conc, mg/l

Associated

Solids Loss,

lbs

2.09 in/hr avg

11-Jun-12 2-1 3.00 168.74 151.15 149.81 149.69 120.00 18.93 0.02 6339.14 3.00 900.00 1.20 2670.46 0.03

2-2 6.00 182.70 152.86 151.64 151.50 140.00 31.06 0.03 4507.41 18.00 120.00 1.00 1094.62 0.01

2-3 9.00 245.52 152.53 150.63 150.56 70.00 94.89 0.09 737.70 0.00 0.00 0.00 0.00

2-4 10.00 242.35 148.00 146.41 146.34 70.00 95.94 0.10 729.62 0.00 0.00 0.00 0.00

2-5 15.00 292.17 150.29 147.72 147.57 150.00 144.45 0.14 1038.42 0.00 0.00 0.00 0.00

2-6 18.00 314.86 152.46 150.42 150.24 180.00 164.44 0.16 1094.62 0.00 0.00 0.00 0.00

AVG = 2407.82 0.00 0.00 0.00 1094.62 0.00


11-Jun-12 4-1 2.00 342.32 155.60 152.01 151.85 160.00 190.31 0.19 840.73 2.00 13.00 10.23 840.73 0.07

4-2 4.00 343.79 154.85 147.97 147.79 180.00 195.82 0.20 919.21 4.00 12.00 9.92 919.21 0.08

4-3 6.00 335.12 153.16 150.13 149.99 140.00 184.99 0.18 756.80 6.00 10.00 11.80 756.80 0.07

4-4 8.00 329.42 153.65 151.01 150.89 120.00 178.41 0.18 672.61 8.00 10.00 12.00 672.61 0.07

4-5 10.00 334.31 153.87 150.35 150.25 100.00 183.96 0.18 543.60 10.00 10.00 12.00 543.60 0.05

4-6 12.00 334.18 149.06 150.64 150.47 170.00 183.54 0.18 926.23 12.00 10.00 12.00 926.23 0.09

4-7 14.00 331.74 154.08 150.15 150.01 140.00 181.59 0.18 770.97 14.00 9.00 13.22 770.97 0.09

4-8 16.00 340.85 155.99 151.72 151.52 200.00 189.13 0.19 1057.47 16.00 9.00 13.33 1057.47 0.12

4-9 18.00 324.38 153.46 150.79 150.59 200.00 173.59 0.17 1152.14 18.00 9.00 13.33 1152.14 0.13

4-10 20.00 340.75 153.61 151.31 151.10 210.00 189.44 0.19 1108.53 20.00 9.00 13.33 1108.53 0.12

AVG = 874.83 23.00 0.00 9.50 1108.53 0.09


11-Jun-12 6-1 2.00 320.75 153.34 152.18 151.18 1000.00 168.57 0.17 5932.25 2.00 7.00 18.14 5932.25 0.90

6-2 4.00 346.29 153.44 152.04 150.56 1480.00 194.25 0.19 7619.05 4.00 6.00 19.83 7619.05 1.26

6-3 6.00 332.52 154.87 151.29 150.23 1060.00 181.23 0.18 5848.92 6.00 6.00 20.00 5848.92 0.98

6-4 8.00 324.26 152.85 151.43 150.29 1140.00 172.83 0.17 6596.08 8.00 5.00 23.80 6596.08 1.31

6-5 10.00 326.82 149.29 147.85 146.58 1270.00 178.97 0.18 7096.16 10.00 5.00 24.00 7096.16 1.42

6-6 10.00 338.54 153.41 151.97 150.79 1180.00 186.57 0.19 6324.70 12.00 5.00 24.00 6324.70 1.27

6-7 14.00 342.37 152.15 149.95 148.69 1260.00 192.42 0.19 6548.18 14.00 5.00 24.00 6548.18 1.31

6-8 16.00 356.11 151.74 148.69 147.27 1420.00 207.42 0.21 6846.01 16.00 5.00 24.00 6846.01 1.37

6-9 18.00 374.16 153.64 151.59 150.22 1370.00 222.57 0.22 6155.37 18.00 5.00 24.00 6155.37 1.23

6-10 20.00 374.03 151.38 151.43 150.00 1430.00 222.60 0.22 6424.08 20.00 5.00 24.00 6424.08 1.29

AVG = 6539.08 24.00 0.00 23.50 6424.08 1.26



Sample

Number

Test

Time,

minutes

Time per

Gallon,

sec

Interval

Time, min

Total Time,

min

Collection

Mid-Time,

min

Runoff

Rate,

gal/min

Associated

Runoff, gal

Cumulative

Runoff, gal

2.09 in/hr

2 0.00 0 0.00 0.00 0.00 0.00 0.00 0.00

2-1 3.00 1020 20.00 20.00 11.50 0.06 1.18 1.18

2-2 0.00 0 0.00 20.00 0.00 0.06 0.00 1.18

2-3 0.00 0 0.00 20.00 0.00 0.06 0.00 1.18

2-4 0.00 0 0.00 20.00 0.00 0.06 0.00 1.18

2-5 0.00 0 0.00 20.00 0.00 0.06 0.00 1.18

2-6 0.00 0 0.00 20.00 0.00 0.06 0.00 1.18

2-end 20.00 0.00 20.00 0.03 0.00 1.18 Total Collected Runoff (approx)

4.06 in/hr

4 0 0 0.00 0.00 0.00 0.00 0.00 0.00

4-1 2 57 2.95 2.95 2.48 1.05 3.11 3.11

4-2 4 17 1.33 4.28 4.14 3.53 4.71 7.81

4-3 6 11 1.90 6.18 6.09 5.45 10.36 18.17

4-4 8 10 1.98 8.17 8.08 6.00 11.90 30.07

4-5 10 9 1.98 10.15 10.08 6.67 13.22 43.30

4-6 12 9 2.00 12.15 12.08 6.67 13.33 56.63

4-7 14 9 2.00 14.15 14.08 6.67 13.33 69.96

4-8 16 9 2.00 16.15 16.08 6.67 13.33 83.30

4-9 18 9 2.00 18.15 18.08 6.67 13.33 96.63

4-10 20 9 2.00 20.15 20.08 6.67 13.33 109.96


6.10 in/hr

6 0 0 0.00 0.00 0.00 0.00 0.00 0.00

6-1 2 8 2.13 2.13 2.07 7.50 16.00 16.00

6-2 4 6 1.97 4.10 4.05 10.00 19.67 35.67

6-3 6 7 2.02 6.12 6.06 8.57 17.29 52.95

6-4 8 6 1.98 8.10 8.05 10.00 19.83 72.79

6-5 10 6 2.00 10.10 10.05 10.00 20.00 92.79

6-6 12 6 2.00 12.10 12.05 10.00 20.00 112.79

6-7 14 6 2.00 14.10 14.05 10.00 20.00 132.79

6-8 16 6 2.00 16.10 16.05 10.00 20.00 152.79

6-9 18 6 2.00 18.10 18.05 10.00 20.00 172.79

6-10 20 5 1.98 20.08 20.04 12.00 23.80 196.59


11-Jun-12

Slope #1

Sample

Number

Test

Time,

minutes

Time per

Gallon,

sec

Interval

Time, min

Total

Time, min

Collection

Mid-Time,

min

Runoff

Rate,

gal/min

Associate

d Runoff,

gal

Cumulative

Runoff, gal

2.13 in/hr

2 0.00 0 0.00 0.00 0.00 0.00 0.00 0.00

2-1 3.00 720 15.00 15.00 9.00 0.08 1.25 1.25

2-2 15.00 95 1.58 16.58 15.79 0.63 1.00 2.25

2-3 18.00 55 2.33 18.92 18.46 1.09 2.55 4.80

2-4 0.00 0 0.00 18.92 0.00 1.09 0.00 4.80

2-5 0.00 0 0.00 18.92 0.00 1.09 0.00 4.80

2-6 0.00 0 0.00 18.92 0.00 1.09 0.00 4.80


4.09 in/hr

4 0 0 0.00 0.00 0.00 0.00 0.00 0.00

4-1 2 17 2.28 2.28 2.14 3.53 8.06 8.06

4-2 4 9 1.87 4.15 4.08 6.67 12.44 20.50

4-3 6 10 2.02 6.17 6.08 6.00 12.10 32.60

4-4 8 9 1.98 8.15 8.08 6.67 13.22 45.83

4-5 10 9 2.00 10.15 10.08 6.67 13.33 59.16

4-6 12 9 2.00 12.15 12.08 6.67 13.33 72.49

4-7 14 9 2.00 14.15 14.08 6.67 13.33 85.83

4-8 16 8 1.98 16.13 16.07 7.50 14.88 100.70

4-9 18 10 2.03 18.17 18.08 6.00 12.20 112.90

4-10 20 10 2.00 20.17 20.08 6.00 12.00 124.90


6.02 in/hr

6 0 0 0.00 0.00 0.00 0.00 0.00 0.00

6-1 2 7 2.12 2.12 2.06 8.57 18.14 18.14

6-2 4 6 1.98 4.10 4.05 10.00 19.83 37.98

6-3 6 6 2.00 6.10 6.05 10.00 20.00 57.98

6-4 8 6 2.00 8.10 8.05 10.00 20.00 77.98

6-5 10 6 2.00 10.10 10.05 10.00 20.00 97.98

6-6 12 6 2.00 12.10 12.05 10.00 20.00 117.98

6-7 14 6 2.00 14.10 14.05 10.00 20.00 137.98

6-8 16 6 2.00 16.10 16.05 10.00 20.00 157.98

6-9 18 6 2.00 18.10 18.05 10.00 20.00 177.98

6-10 20 5 1.98 20.08 20.04 12.00 23.80 201.78


11-Jun-12

Slope #2

Sample

Number

Test

Time,

minutes

Time per

Gallon,

sec

Interval

Time, min

Total

Time, min

Collection

Mid-Time,

min

Runoff

Rate,

gal/min

Associated

Runoff, gal

Cumulative

Runoff, gal

2.09 in/hr

2 0.00 0 0.00 0.00 0.00 0.00 0.00 0.00

2-1 3.00 900 18.00 18.00 10.50 0.07 1.20 1.20

2-2 18.00 120 2.00 20.00 19.00 0.50 1.00 2.20

2-3 0.00 0 0.00 20.00 0.00 0.50 0.00 2.20

2-4 0.00 0 0.00 20.00 0.00 0.50 0.00 2.20

2-5 0.00 0 0.00 20.00 0.00 0.50 0.00 2.20

2-6 0.00 0 0.00 20.00 0.00 0.50 0.00 2.20


4.06 in/hr

4 0 0 0.00 0.00 0.00 0.00 0.00 0.00

4-1 2 13 2.22 2.22 2.11 4.62 10.23 10.23

4-2 4 12 1.98 4.20 4.10 5.00 9.92 20.15

4-3 6 10 1.97 6.17 6.08 6.00 11.80 31.95

4-4 8 10 2.00 8.17 8.08 6.00 12.00 43.95

4-5 10 10 2.00 10.17 10.08 6.00 12.00 55.95

4-6 12 10 2.00 12.17 12.08 6.00 12.00 67.95

4-7 14 9 1.98 14.15 14.08 6.67 13.22 81.17

4-8 16 9 2.00 16.15 16.08 6.67 13.33 94.50

4-9 18 9 2.00 18.15 18.08 6.67 13.33 107.84

4-10 20 9 2.00 20.15 20.08 6.67 13.33 121.17


6.14 in/hr

6 0 0 0.00 0.00 0.00 0.00 0.00 0.00

6-1 2 7 2.12 2.12 2.06 8.57 18.14 18.14

6-2 4 6 1.98 4.10 4.05 10.00 19.83 37.98

6-3 6 6 2.00 6.10 6.05 10.00 20.00 57.98

6-4 8 5 1.98 8.08 8.04 12.00 23.80 81.78

6-5 10 5 2.00 10.08 10.04 12.00 24.00 105.78

6-6 12 5 2.00 12.08 12.04 12.00 24.00 129.78

6-7 14 5 2.00 14.08 14.04 12.00 24.00 153.78

6-8 16 5 2.00 16.08 16.04 12.00 24.00 177.78

6-9 18 5 2.00 18.08 18.04 12.00 24.00 201.78

6-10 20 5 2.00 20.08 20.04 12.00 24.00 225.78


11-Jun-12

Slope #3

Run #: 1 2 3

Slope No. SLOPE #1 SLOPE #2 SLOPE #3

Test Date: 11-Jun-12 11-Jun-12 11-Jun-12

Avg Moisture Content: 18.28% 19.22% 19.92%

Location T-1 T-2 T-3

Wt. Of cup + wet soil, g 32.76 40.66 31.27

Wt. Of cup + dry soil, g 29.71 36.27 28.46

Wt. Of cup, g 14.03 14.03 14.03

Wt. Of dry soil, g 15.68 22.24 14.43

Wt. Of water, g 3.05 4.39 2.81

Water Content, w% 19.5% 19.7% 19.5%

Location M-1 M-2 M-3



Wt. Of cup, g 14.03 14.03 14.03

Wt. Of dry soil, g 15.63 18.42 28.91

Wt. Of water, g 2.83 3.19 5.52

Water Content, w% 18.1% 17.3% 19.1%

Location B-1 B-2 B-3



Wt. Of cup, g 14.03 14.03 14.03

Wt. Of dry soil, g 14.98 15.28 15.52

Wt. Of water, g 2.59 3.15 3.29

Water Content, w% 17.3% 20.6% 21.2%

WATER CONTENT DETERMINATION

Total Dry Sediments: 0.02

2 in/hr Collected

Wt. Of pan + wet soil, lb

Wt. Of pan + dry soil, lb 0.12

Wt. Of pan, lb 0.1

Wt. Of dry soil, lb 0.02 0

Wt. Of water, lb

Water Content, w% 0.0

Total Wet Sediments, lb -

% dry solids - 1.2

Dry Collected Sediments, lbs 0.02 0.00


4 in/hr Collected



Wt. Of pan, lb 0.1


Wt. Of water, lb



% dry solids - 119.5



6 in/hr Collected



Wt. Of pan, lb 0.5


Wt. Of water, lb





Add'l Soil Collected after Major

Slumping

SLOPE #1 - Sediment Weights

Not Applicable

Typ. TSS in

Decanted

Collected

Runoff,

lb/gal

Collected

Sediments,

gal

Typ. TSS in

Decanted

Collected

Runoff,

lb/gal

Collected

Sediments,

gal

Typ. TSS in

Decanted

Collected

Runoff,

lb/gal

Collected

Sediments,

gal


2 in/hr Collected



Wt. Of pan, lb 0.1


Wt. Of water, lb



% dry solids - 4.8



4 in/hr Collected



Wt. Of pan, lb 0.1


Wt. Of water, lb






6 in/hr Collected



Wt. Of pan, lb 0.5


Wt. Of water, lb






Slumping


Not Applicable

Collected

Sediments,

gal

Typ. TSS in

Decanted

Collected

Runoff,

lb/gal

Typ. TSS in

Decanted

Collected

Runoff,

lb/gal

Typ. TSS in

Decanted

Collected

Runoff,

lb/gal

Collected

Sediments,

gal

Collected

Sediments,

gal


2 in/hr Collected



Wt. Of pan, lb 0.1


Wt. Of water, lb



% dry solids - 2.2



4 in/hr Collected



Wt. Of pan, lb 0.1


Wt. Of water, lb






6 in/hr Collected



Wt. Of pan, lb 0.5


Wt. Of water, lb






Slumping

Collected

Sediments,

gal

Not Applicable


Typ. TSS in

Decanted

Collected

Runoff,

lb/gal

Typ. TSS in

Decanted

Collected

Runoff,

lb/gal

Collected

Sediments,

gal

Typ. TSS in

Decanted

Collected

Runoff,

lb/gal

Collected

Sediments,

gal



June 30, 2012

Appendix

APPENDIX B – TEST SOIL

Test Soil Grain Size Distribution Curve

Compaction Curves

Field Compaction Verification

December 2011

Corporate Laboratory: 9063 Bee Caves Road, Austin, TX 78733 / 800-880-TEST / 512-263-2101 / [email protected]

Denver Downs Research Facility: 4915 Clemson Blvd., Anderson, SC 29621 / 864-242-2220 / [email protected]

0

10

20

30

40

50

60

70

80

90

100

0.0001 0.001 0.01 0.1 1 10 100

Pe

rce

nt

Fin

er

Particle Size (mm)

DDRF ASTM D 6459 Blended Test Soil

ASTM D 6459 Target Loam Range

Plasticity (ASTM D 4318) Liquid Limit: 30 Plastic Limit: 22 Plastic Index: 8

Soil classifies as a silty sand (SM) in accordance with ASTM D 2487

Tested by: Tamika Walker

TRI observes and maintains client confidentiality. TRI limits reproduction of this report, except in full, without prior approval of TRI.

9063 Bee Caves Road Austin, TX 78733-6201 (512) 263-2101 (512) 263-2558 1-800-880-TEST

Cheng-Wei Chen, 02/03/10

Quality Review/Date

The testing herein is based upon accepted industry practice as well as the test method listed. Test results reported herein do not apply

to samples other than those tested. TRI neither accepts responsibility for nor makes claim as to the final use and purpose of the material.

Proctor Compaction Test

80

85

90

95

100

105

110

115

120

5 10 15 20 25 30 35 40 45

Moisture Content (%)

Dry

Den

sity

(pcf

)

2.80

2.60

2.70

Project: TRI-DDRF

Sample No.: DDRF Test Soil - January 2010

TRI Log No.: E2337-12-04

Test Method: ASTM D 698 - Method A

Maximum Dry Density (pcf): 98.7

Optimum Moisture Content (%): 20.0

Calibration Date: 8/16/2009

Sand Used: Pool Filter Sand

Volume Measure: Liquid Volume, Vm (cm3): 425

Wt. of Sand to Fill Known Volume:

Total Wt (g) Pan Wt (g) Net Wt (g)

Trial #1 (g) 663.3 11.5 651.8

Trial #2 (g) 661.3 11.5 649.8

Trial #3 (g) 657.3 11.5 645.8

Wa (g) 649.1

Density of Sand, ɣsand (g/cm3) = Wa / Vm = 1.53

Wt. of Sand to Fill Cone:

Total Wt (g) Cone Wt (g) Net Wt (g)

Trial #1 (g) 7046.0 5152.9 1893.1

Trial #2 (g) 7045.3 5152.9 1892.4

Trial #3 (g) 7046.9 5152.9 1894.0

Wt. of Sand in Cone (g): 1893.2

Field Data Date: 11/4/2009

Wt. of Wet Soil + Pan (g) 856.8

Wt. of Dry Soil + Pan (g) 725.3

Wt. of Pan (g) 14.5

Wt. of Wet Soil, W' (g) 842.3

Wt. of Dry Soil (g) 710.8

Wt. of Water (g) 131.5

Water Content, w (%) 0.185

Sand Used: Pool Filter Sand

Unit Wt. of Sand, ɣsand (g/cm3) = 1.53

Wt. of Jug & Cone Before (g) = 7046.08

Wt. of Jug & Cone After (g) = 4450.06

Wt. of Sand Used (g) = 2596.02

Wt. of Sand in Cone (g) = 1893.17

Wt. of Sand in Hole, W (g) = 702.85

Volume of hole, Vh (cm3) = W / ɣsand = 460.17

Wet density, ɣwet = W' / Vh (kN/m3) = 1.83

Wet density, ɣwet = W' / Vh (lb/ft3) = 114.17

Dry density, ɣdry = ɣwet / [1 + w] (kN/m3) = 1.54

Wet density, ɣwet = W' / Vh (lb/ft3) = 96.34

Max Std. Proctor Dry density (kN/m3) = 104.40

Opt. Moisture via Std. Proctor density (%) = 20.10

Compaction as % of Std. Proctor = 92.3%

Density Calculation:

Compaction Worksheet

ASTM D 1556

Volume Data:

Soil Data:



June 30, 2012

Appendix

APPENDIX C – RAINFALL DATA

Raindrop Size Distribution

Rainfall Calibration

Date: 5-Aug-11 Start Time: 8:10 AM End Time: 8:25 AM

Test Time: 15 min. (circle "x" for open valves)

P = 9 psi

x d = 12 mm d = 12 mm

X P = 9 psi i = 1.89 in/hr B i = 1.89 in/hr

x d = 14 mm d = 13 mm x

x i = 2.20 in/hr C i = 2.05 in/hr P = 9 psi X

x d = 14 mm d = 14 mm x

X P = 9 psi i = 2.20 in/hr D i = 2.20 in/hr x

x d = 14 mm d = 15 mm x

x i = 2.20 in/hr E i = 2.36 in/hr P = 9 psi x

x d = 15 mm d = 14 mm X

X P = 9 psi i = 2.36 in/hr F i = 2.20 in/hr x

x d = 14 mm d = 14 mm x

x i = 2.20 in/hr G i = 2.20 in/hr P = 9 psi x

x d = 13 mm d = 14 mm X

x P = 9 psi i = 2.05 in/hr H i = 2.20 in/hr x

X d = 12 mm d = 13 mm x

x i = 1.89 in/hr I i = 2.05 in/hr P = 9 psi X

x d = 11 mm d = 13 mm X

X P = 9 psi i = 1.73 in/hr J i = 2.05 in/hr x

X d = 11 mm d = 11 mm

x i = 1.73 in/hr i = 1.73 in/hr

Bottom Catch: 74 gal

Inlet Pressure: 16 psi

Average Wind: 0 mph

Average Depth: 13.15 mm

Average Rainfall Intensity: 2.07 in/hr

Christiansen Uniformity Coefficient: 92

11

5 6

4

7 8

9 10

3

12

19 20

13

15 16

17

14

18


TOP OF SLOPE

DDRF

Slope 1 - Target 2 in/hr

x x X x

1 2

A



P = 9 psi

X d = 24 mm d = 24 mm


x d = 25 mm d = 25 mm X


X d = 26 mm d = 24 mm x


x d = 25 mm d = 26 mm X

x i = 3.94 in/hr E i = 4.09 in/hr P = 9 psi X

x d = 27 mm d = 27 mm x

x P = 9 psi i = 4.25 in/hr F i = 4.25 in/hr x

X d = 25 mm d = 28 mm x

X i = 3.94 in/hr G i = 4.41 in/hr P = 9 psi x

x d = 25 mm d = 26 mm X

x P = 9 psi i = 3.94 in/hr H i = 4.09 in/hr X

X d = 24 mm d = 27 mm x

X i = 3.78 in/hr I i = 4.25 in/hr P = 9 psi X

x d = 26 mm d = 25 mm X

X P = 9 psi i = 4.09 in/hr J i = 3.94 in/hr X

X d = 24 mm d = 24 mm

X i = 3.78 in/hr i = 3.78 in/hr



Average Wind: 0 mph




TOP OF SLOPE

DDRF


7 8

9 10

3 4

2

11 12

19 20

13 14


18

5 6

A

15 16

17

x x X X

1

Date: 4-Aug-11 Start Time: 4:10 PM End Time: 4:25 PM


P = 9 psi

X d = 36 mm d = 38 mm


X d = 38 mm d = 37 mm X


X d = 40 mm d = 37 mm X


X d = 43 mm d = 39 mm X

x i = 6.77 in/hr E i = 6.14 in/hr P = 9 psi X

X d = 42 mm d = 41 mm X

X P = 9 psi i = 6.61 in/hr F i = 6.46 in/hr x

X d = 41 mm d = 38 mm x

x i = 6.46 in/hr G i = 5.98 in/hr P = 9 psi X

x d = 37 mm d = 40 mm X

X P = 9 psi i = 5.83 in/hr H i = 6.30 in/hr X

X d = 38 mm d = 39 mm X

X i = 5.98 in/hr I i = 6.14 in/hr P = 9 psi X

X d = 36 mm d = 38 mm X

X P = 9 psi i = 5.67 in/hr J i = 5.98 in/hr X

X d = 34 mm d = 37 mm

X i = 5.35 in/hr i = 5.83 in/hr



Average Wind: 0 mph




11

5 6

4

7 8

9 10

3

12

19 20

13

15 16

17

14

18


TOP OF SLOPE

DDRF


x X X X

1 2

A



P = 9 psi

d = 11 mm d = 11 mm x

i = 1.73 in/hr B i = 1.73 in/hr P = 9 psi X

x d = 11 mm d = 13 mm x

X P = 9 psi i = 1.73 in/hr C i = 2.05 in/hr x

x d = 13 mm d = 13 mm x

x i = 2.05 in/hr D i = 2.05 in/hr P = 9 psi X

x d = 14 mm d = 14 mm x

X P = 9 psi i = 2.20 in/hr E i = 2.20 in/hr x

x d = 15 mm d = 15 mm x

x i = 2.36 in/hr F i = 2.36 in/hr P = 9 psi x

x d = 15 mm d = 15 mm X

x P = 9 psi i = 2.36 in/hr G i = 2.36 in/hr x

X d = 15 mm d = 14 mm x

x i = 2.36 in/hr H i = 2.20 in/hr P = 9 psi x

x d = 13 mm d = 13 mm X

x P = 9 psi i = 2.05 in/hr I i = 2.05 in/hr x

X d = 13 mm d = 12 mm x

X i = 2.05 in/hr J i = 1.89 in/hr P = 9 psi x

d = 12 mm d = 11 mm X

i = 1.89 in/hr i = 1.73 in/hr X



Average Wind: 0 mph




TOP OF SLOPE

DDRF


7 8

9 10

3 4

2

11 12

19 20

13 14


18

5 6

A

15 16

17

x x X x

1



P = 9 psi

d = 21 mm d = 23 mm X


X d = 24 mm d = 25 mm x


x d = 26 mm d = 27 mm X


X d = 25 mm d = 26 mm x


x d = 27 mm d = 27 mm x


x d = 26 mm d = 28 mm X

x P = 9 psi i = 4.09 in/hr G i = 4.41 in/hr X

X d = 27 mm d = 28 mm x

X i = 4.25 in/hr H i = 4.41 in/hr P = 9 psi x

x d = 26 mm d = 27 mm X

X P = 9 psi i = 4.09 in/hr I i = 4.25 in/hr X

X d = 25 mm d = 25 mm x

X i = 3.94 in/hr J i = 3.94 in/hr P = 9 psi X

d = 24 mm d = 24 mm X

i = 3.78 in/hr i = 3.78 in/hr X



Average Wind: 0 mph




11

5 6

4

7 8

9 10

3

12

19 20

13

15 16

17

14

18


TOP OF SLOPE

DDRF


x x X X

1 2

A



P = 9 psi

d = 34 mm d = 35 mm X


X d = 34 mm d = 37 mm X


X d = 37 mm d = 40 mm X


X d = 38 mm d = 41 mm X


X d = 38 mm d = 41 mm x

x i = 5.98 in/hr F i = 6.46 in/hr P = 9 psi X

x d = 41 mm d = 40 mm X

X P = 9 psi i = 6.46 in/hr G i = 6.30 in/hr X

X d = 41 mm d = 40 mm x

X i = 6.46 in/hr H i = 6.30 in/hr P = 9 psi X

X d = 40 mm d = 39 mm X


X d = 38 mm d = 37 mm X


d = 37 mm d = 34 mm X

i = 5.83 in/hr i = 5.35 in/hr X



Average Wind: 0 mph




TOP OF SLOPE

DDRF


7 8

9 10

3 4

2

11 12

19 20

13 14


18

5 6

A

15 16

17

x X X X

1



P = 9 psi

d = 10 mm d = 11 mm X


x d = 12 mm d = 11 mm x


x d = 13 mm d = 12 mm x


x d = 14 mm d = 12 mm x


x d = 15 mm d = 14 mm x


x d = 16 mm d = 15 mm X

x P = 9 psi i = 2.52 in/hr G i = 2.36 in/hr x

X d = 15 mm d = 13 mm x

x i = 2.36 in/hr H i = 2.05 in/hr P = 9 psi x

x d = 13 mm d = 13 mm X

x P = 9 psi i = 2.05 in/hr I i = 2.05 in/hr x

X d = 13 mm d = 13 mm x

X i = 2.05 in/hr J i = 2.05 in/hr P = 9 psi x

d = 11 mm d = 11 mm X

i = 1.73 in/hr i = 1.73 in/hr X



Average Wind: 0 mph




11

5 6

4

7 8

9 10

3

12

19 20

13

15 16

17

14

18


TOP OF SLOPE

DDRF


x x X X

1 2

A



P = 9 psi

d = 23 mm d = 24 mm X


X d = 22 mm d = 26 mm x


x d = 24 mm d = 27 mm X


X d = 28 mm d = 26 mm x


x d = 28 mm d = 28 mm x


x d = 27 mm d = 27 mm X

x P = 9 psi i = 4.25 in/hr G i = 4.25 in/hr X

X d = 27 mm d = 25 mm x

X i = 4.25 in/hr H i = 3.94 in/hr P = 9 psi x

x d = 26 mm d = 25 mm X


X d = 24 mm d = 24 mm x


d = 23 mm d = 24 mm X

i = 3.62 in/hr i = 3.78 in/hr X



Average Wind: 0 mph




TOP OF SLOPE

DDRF


7 8

9 10

3 4

2

11 12

19 20

13 14


18

5 6

A

15 16

17

x x X X

1


Test Time: 15.00 min. (circle "x" for open valves)

P = 9 psi

d = 33 mm d = 36 mm X


X d = 37 mm d = 38 mm X


X d = 37 mm d = 40 mm X


X d = 39 mm d = 39 mm X


X d = 41 mm d = 40 mm x

x i = 6.46 in/hr F i = 6.30 in/hr P = 9 psi X

x d = 40 mm d = 40 mm X

X P = 9 psi i = 6.30 in/hr G i = 6.30 in/hr X

X d = 40 mm d = 41 mm x

X i = 6.30 in/hr H i = 6.46 in/hr P = 9 psi X

X d = 41 mm d = 38 mm X


X d = 38 mm d = 36 mm X


d = 37 mm d = 35 mm X

i = 5.83 in/hr i = 5.51 in/hr X



Average Wind: 0 mph




11

5 6

4

7 8

9 10

3

12

19 20

13

15 16

17

14

18


TOP OF SLOPE

DDRF


x X X X

1 2

A

0.00

5.00

10.00

15.00

20.00

25.00

30.00

35.00

40.00

45.00

50.00

2 4 6

% o

f R

ain

dro

ps

by

Mas

s

Rainfall Intensity, in/hr

Raindrop Size Distribution August 2011

0.21 - 0.425 mm 0.425 - 1.0 mm 1.0 - 2.0 mm 2.0 - 4.75 mm 4.75 - 6 mm

Target raindrop size and distribution (no more than 10 % greater than 6 mm (0.24 in.) and no more than 10 % smaller than 1 mm (0.04 in.)).



June 30, 2012

Appendix

APPENDIX D – ANCHORAGE PATTERN

x x x x

x x

x 5 ft x x

x x

4 ft

x x x

x x

x x x

x x

1.2 staples/syx x x

x x

x x x

x x

x x x

x x

x x x

x x

x x x x

APPENDIX E

REPORT REVISION The reported performance (Cover Factor) has not changed. The reported corresponding simulated storm intensity (Rainfall Factor) has been lowered from R = 231 to R = 162.

NTPEP ASTM D 6459 Rainfall Data and C-Factor Revision to Data Explanation

Testing of Rolled Erosion Control Products (RECPs) and Hydraulically Applied Erosion Control Products (HECPs) is conducted by a number of methods. NTPEP selected ASTM D 6459-07 as a large scale method to determine the performance of these materials with respect to sediment yield due to rainfall and associated runoff. Upon review, one issue was noted in the determination of the R-Factor.

R-Factor Background

This factor is computed from an empirically derived equation which links rainfall with erosion potential. These empirically derived equations were based on real world rainfall. In this computation, the larger the raindrops and more intense the rainfall, the higher the R-Factor. By combining drop size and storm intensity, the R-Factor is derived from testing to quantify the total erosion generating potential of the simulated storm.

False Assumption

Each laboratory’s rainfall simulator creates a unique range and proportion of raindrop sizes in an attempt to simulate “natural rainfall” and to release the drops from a sufficient height, both in accordance with the standard. All raindrops were originally assumed to reach terminal velocity prior to impact if the required raindrop size distribution and drop height (14 ft) was achieved. Through research and industry input, this was determined to be an improper assumption. Some of the smaller sized raindrops don’t reach terminal velocity when dropped from the height called for in the test method. At less than terminal velocity the total erosion generating potential (R Factor) is also less. Therefore, a lower R-Factor should be reported in association with the reported measured soil losses.

Revised Value

As described above, the reported R-Factor must be revised to accurately describe the rainfall energy employed in the testing. When adjusting for the lower velocities of the smaller raindrops in the empirical equations, the revised R-Factor has been calculated to be 162 for the NTPEP laboratory conducting these tests. All NTPEP ASTM D 6459 test reports that do not reflect this adjusted value must be amended.

Impact on End Users

For end users of the NTPEP test reports, it is expected that the product approval processes or specification requirements may need to be updated to reflect the updated reporting of C Factors at R = 162 rather than at R = 231.

goret

Typewritten Text

Amended April 2016

y = 0.00000017x2 + 0.00002541xR² = 0.99051663

y = 0.00000035x2 + 0.00003650xR² = 0.99042117

0.00

0.01

0.02

0.03

0.04

0.05

0.06

0.07

0.08

0.09

0.10

0 20 40 60 80 100 120 140 160 180 200 220 240 260 280

C-F

acto

r

R-Factor

C-Factor vs. R-Factor(US-2S at 1.2 staples/sy on TRI-Loam; 3:1 Slope)

All Slopes - NOT SCALED All Slopes - SCALED Poly. (All Slopes - NOT SCALED) Poly. (All Slopes - SCALED)

NOT "SCALED" FOR K.E.: The cummulative R-Factor calculated for the following events: 2 in/hr for 20 min + 4 in/hr for 20 min + 6 in/hr for 20 min, is R = 231 and the associated C-Factor is determined from the best-fit regression eqn.

"SCALED" FOR K.E.: The cummulative R-Factor calculated for the following events: 2 in/hr for 20 min + 4 in/hr for 20 min + 6 in/hr for 20 min, is R = 162 and the associated C-Factor is determined from the best-fit regression eqn.

C-Factor = 0.016 for both calculations of R-Factor

goret

Typewritten Text

Amended April 2016

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