1987-12-01_PERMIT FILE - C1981017 ‎(165)‎

• Permit No: C1981017
• IBM Index Class Name: PERMIT FILE
• Doc Date: 12/1/1987
• Doc Name: David E. Fleming Company Prepartation Plant Area Surface Drainage Plan
• Section_Exhibit Name: Chapter II Attachment 3 to Appendix II-B-7
• Media Type: D
• Archive: No

6.6
r Table 6.2 Maximum Permissible Velocities Proposed
by Fortier and Scoby (1926)
Henn velocity, After Aging, of Canals
(d < 3ft)
Water
transporting
noncolloidal
Clear Water silts, sands
Original material water, transporting gravels or
excavated for no colloidal rock
canals n detritus silt fragments
ft/sec m/sec ft/sec m/sec ft/sec m/sec
1. Fine sand
(colloidal) 0.02 1.5 0.46 2.50 0.76 1.50 0.46
2. Sandy loam
(noncolloidal) 0.02 1.45 - 0.53 2.50 0.76 2.00 0.61
3. Silt loam '
(noncolloidal) 0.02 2.00 0.61 3.00 0.91 2.00 0.61
.4. Alluvial silt
when
noncolloidal 0.62 2.00 0.61 3.50 1.07 2.00 0.61
S. Ordinary firm
loam 0.02 2.50 0.76 3.50 1.07 2.25 0.69
6. Volcanic ash 0.02 2.50 0.76 3.50 1.07 2.00 0.61
7. Fine gravel 0.02 2.50 0.76 5.00 1.52 3.75 1.14
S. Stiff clay (very
colloidal) 0.025 3.75 1.14 5.00 1.52 3.00 0.91
9. Graded, loam to
cobbles, when
noncolloidal 0.03 3.75 1.14 5.00 1.52 5.00 1.52
10. Alluvial silt
when colloidal 0.025 3.75 1.14 5.00 1.52 3.00 0.91
11. Graded, silt
to cobbles,
when colloidal 0.03 4.00 1.22 5.50 1.68 5.00 1.52
12. Coarse gravel
(noncolloidal) 0.025 4.00 1.22 6.00 1.83 6.50 1.98
13. Cobbles and
shingles 0.035 5.00 1.52 5.50 1.68 6.50 1.98
14. Shales and
hard pans 0.025 6.00 1.83 6.00 1.83 5.00 1.52
MOM OSM -SuRFAcr WATEA
IIy0AOLOGy ANO 6row1FNTOLO6Y NANCIAL
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