Dike Construction
Wednesday, 29 August 2007

Recommended procedure for sandbag dike construction.

 

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Dike Construction Diagram

  1.  Base area of sand bag dike should be clear of snow or ice prior to commencing.
  2. Leave at least 8 feet between a dike and buildings.
  3. The base of the dike should be 2 feet wider than the ultimate height of the dike, E.G. Height = 4 ft., base = 6 ft.. Every second layer of sand bags should be set back 1/4 of a sand bag width, both on the river side and the land side of the dike, giving it a step-like appearance. The top of the dike should be 2 feet wide.
  4. The bottom layer of bags on the river side will run parallel with the river.
  5. Sand bags are to be tamped firmly into place.
  6. It is recommended that 6 mil polyethylene sheets in 10 foot wide rolls be used as water proofing on the river side of the dike. The polyethylene sheet should be placed loosely against the sand bag dike during construction with a protective layer of sand bags placed on the river side as indicated in the figure.
  7. Have extra sand bags on hand to strengthen any weak spots in the dike.
  8. If untied bags are used, the top, or unfilled portion of the sack should be stretched lengthwise and the next bag laid on top of it. This method is known as lapping as indicated in the figure. It is not necessary to tie sacks. Untied bags should be filled to half full.
  9. You can build a simple sandbag filling rack to expedite filling the sandbags.

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Height of dike

Height of dike

Number of Sandbags Required for the following Lengths of dike

(Lengths in Feet)

50
100
150
200
250
300
350
400
450
500
550
600
650
700
0.5
210
430
640
850
1070
1280
1500
1710
1920
2140
2350
2560
2780
2990
1.0
470
950
1420
1900
2370
2850
3320
3800
4270
4750
5220
5700
6170
6650
1.5
780
1570
2350
3130
3920
4700
5480
6270
7050
7830
8620
9400
10190
10970
2.0
1100
2300
3400
4600
5700
6800
8000
9100
10300
11400
12500
13700
14800
16000
2.5
1500
3100
4600
6200
7700
9300
10800
12300
13900
15400
17000
18500
20100
21600
3.0
2000
4000
6000
8000
10000
12000
14000
16000
17900
19900
21900
23900
25900
27900
3.5
2500
5000
7500
10000
12500
15000
17500
19900
22400
24900
27400
29900
32400
34900
4.0
3000
6100
9100
12200
15200
18200
21300
24300
27400
30400
33400
36500
39500
42500
4.5
3600
7300
10900
14500
18200
21800
25400
29100
32700
36300
40000
43600
47200
50900
5.0
4300
8500
12800
17100
21400
25600
29900
34200
38500
42700
47000
51300
55600
59800
5.5
5000
9900
14900
19800
24800
29800
34700
39700
44700
49600
54600
59500
64500
69500
6.0
5700
11400
17100
22800
28500
34200
39900
45600
51300
57000
62700
68400
74100
79800
 
Last Updated ( Wednesday, 29 August 2007 )