final Sedimentation Report - City and Borough of Sitka

pan 3,876 14.36 mm
0.0471 ft
Blue Lake Creek Delta Sediment Samples
Station Blue Lake Delta Transect 3, SM -0.35
D65= 14.8 mm
Armor Layer D50= 1.0 mm
Size (mm) Percent Cum % Avg size No.
1 56% 56% 0.56 100
2 0% 56% 0.00 0
4 1% 56% 0.03 1
5.7 1% 57% 0.08 2
8 2% 59% 0.16 3
11 3% 62% 0.38 5
16 4% 66% 0.86 8
22.6 4% 71% 1.21 8
32 10% 81% 3.85 18
45 10% 91% 5.45 18
64 3% 94% 2.57 6
90 3% 97% 3.63 6
128 2% 99% 2.57 3
180 1% 100% 2.42 2
256 0% 100% 0.00 0
23.75 mm 180
0.0779 ft
Percent Passing
Blue Lake Delta Transect 3, SM
-0.35
December 2009
D65= 8.8 mm
Sub-Armor Layer D50= 5.0 mm
Weight
Avg
Size (mm) (g) Percent Cum % size
128 0 0% 100% 0
64 0 0% 100% 0
37.5 39 1% 100% 0.68947
16 1,068 38% 99% 10.0551
8 415 15% 61% 1.75276
4 275 10% 46% 0.58073
2 241 8% 37% 0.25447
1 266 9% 28% 0.14059
0.5 285 10% 19% 0.07517
0.25 159 6% 9% 0.02101
0.125 55 2% 3% 0.00361
0.063 16 1% 1% 0.00053
Blue Lake Creek Reservoir Sedimentation Report Page A-3 Appendix A. Grain Size Data
100%
90%
80%
70%
60%
50%
40%
30%
20%
10%
0%
0.1 1 10 100 1000
Armor Size (mm) Layer
Sub-Armor Layer