PERMFILE107579

• Permit No: M1977526
• IBM Index Class Name: Permit File
• Doc Date: 11/4/1977
• Section_Exhibit Name: DESCRIPTION OF WATER RESOURCES
• Media Type: D
• Archive: No

- Seepage from the river will prevent drawdowns of water levels
in wells east of the river.
There are no sub-irrigated areas on the property,
therefore, the drawdowns resulting from lowered lake levels
will not impact any areas containing a naturally high
water table.
Drainage
The flood plain and floodo-~ay limits will not be affected
upstream of the site. Within the site, the mining and recla:.
ation operations will alter the flood plain and floodway
limits. The alteration will be negligable as the operation
begins and progresses to the ultimates limits (Figure 6).
Flood velocities will increase and depths will decrease
as the overbank flood goes over the south lake's southern
bank. The chance for erosion may be great because of the
large difference in ele-~ation between the ground level and
the lake surface. If the lake bank extends too close to
the site's southern boundary, it may induce more overbank
flood flow, which may adversely affect the damage potential
for other properties. As planned the lake is located
sufficiently to the north to prevent this from occuring.
The overbank flood profile will be relatively flat
for the length of the lake. Henderson Road will contim•~
to control flood elevations at their previous levels. .north
of Henderson Road, no change in the flood plain or f'_ood~.;ay
limits will result form the mining or reclamation operations.
Erosion may be a problem at the north lake's southwest
bank as flood water passes over it.
Site drainage in the south area
Brantner Ditch water ~,vill flow into the
for irrigation. An overflow for the
the culvert under Ienderson Road. I
site drainage will be into the lake,
be provided.
will be into the lake.
lako and be pumped out
lake will drain to
1 the north area, some
but no overflow will
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