2010-05-07_PERMIT FILE - C2009087 ‎(45)‎

• Permit No: C2009087
• IBM Index Class Name: Permit File
• Doc Date: 5/7/2010
• Doc Name: Turf Reinforcement Mat Design & Installation Information
• Section_Exhibit Name: Exhibit 2.05.3-E2 Appendix 2.05.3-E2.G Attachment 2.05.3-E2.G-3
• Media Type: D
• Archive: No

C7
1�1
PERFORMANCE SPECIFICATION
NORTH
AM
GRE _
.'..
The composite turf reinforcement mat (C -TRM) shall be a machine - produced mat of 100% coconut fiber matrix
incorporated into a permanent three - dimensional turf reinforcement matting.
The matrix shall be stitch bonded between a super heavy duty W stabilized bottom net with 0.50 x 0.50 inch
(1.27 x 1.27 cm} openings, a ultra duty W stabilized, dramatically corrugated (crimped) intermediate netting
with 0.50 x 0.50 inch (1.27 x 1.27 cm) openings, and covered by a super heavy duty W stabilized top net with 0.50
gs. The netting shall form prominent closely
x 0.50 inch (1.27 x 1.27 cm) openin corrugate spaced ridges across
the entire width of the mat The three nettings shall be stitched together on 1.50 inch (3.81 cm) centers with UV
stabilized polypropylene thread to form a permanent three - dimensional turf reinforcement -matting.
S1
s20ft(6m
20 -50ft
Z 50 t (15.21
)ughness Coefficients - Unvegetated
Flow Depth Manrung's n'
< 0.50 ft (0.15 m) 0.041
0.50 - 2.00 ft 0.040 -0.013
2.00 ft (0.60 m) 0.012
Data - Unve- etated Cover Factors
Slone Gradient (S)
<_ 3:1
3:1 -2:1
>_ 2:1
0.0005
0.015
0.043
0.018
0.031
0.050
0.035
0.047
0.057
Channel Design Data
- 1 Maximum Permissible Shear Stress*
Phase 1
UNVEGETATED
Phase 2
PARTIALLY VEGETATED
Approximate Maximum Flow V elocity Phase 3
Unvegetated =10.5 ft/s (3.20 m /s) FULLY VEGETATED
Vegetated = 20 ft /s (6.0 m /s)
Short Duration
Long D uration
3.201bs /ft
3.00lbs /ft
(153 Pa)
(144 Pa)
105001bs /ft
10.00lbs /ft
12.O0lbs /ft 10.00lbs/ft0
(576 Pa) 1 (480 Pa)
Values are approximate, precise values obtained from ECMDSTM
*Performance values obtained through third party testing at the Texas Transportation Institute, Colorado State University,
and Utah State University based on soil loss failure criteria not exceeding 0.50 inches (1.27 cm).
•