2023-05-25_PERMIT FILE - M2022048 ‎(9)‎

• Permit No: M2022048
• IBM Index Class Name: Permit File
• Doc Date: 5/25/2023
• Doc Name Note: Cover Letter
• Doc Name: Adequacy Review Response
• From: Environment Inc/LG Everist Inc
• To: DRMS
• Email Name: ECS
• Email Name: MAC
• Media Type: D
• Archive: No

ENVIRONMENT, INC. PAGE 6
L.G. EVERIST, INC.-WEST FARM RESERVOIR ADEQUACY RESPONSE 01
MAY 23, 2023
areas where they are adjacent to this ditch. Please revise mining and
reclamation plans as needed.
Per our discussion, LGE does not believe this irrigation return flow ditch needs armoring
south of CR 32.5 because no flood water reached it during the 2013 flood event. This
ditch was constructed by a previous land owner that excavated a trench into the
groundwater table to create a slough for hunting ducks. This trench started south of CR
32.5 and extended to the river and the only reason there is water flow is because it has
intercepted the ground water table. LGE will armor the reservoir bank in Phase 2 along
this ditch (on the north side of CR 32.5) as suggested by the Division. Map Exhibits C-1,
F, and Exhibits D, E and L have been revised to reflect this change.
16) The area between Phase 1 and Phase 2 containing County Road 32.5 is
considered by DRMS to be a "Type B Lateral Berm"as described in section
2.5.2. As such, the minimum berm widths given in sections 2.7.2.1 and 2.7.2.2
will apply. These are: 350 feet minimum width for an unprotected berm, and 200
feet minimum width if the berm is protected in accordance with the requirements
of section 2.5.3. (The current 160' width proposed is well below the requirement
for either scenario) Please modify the mining and reclamation plans accordingly
to reflect these setback requirements.
Per your suggestion, we have increased the setbacks north and south of CR 32.5 by 20
feet each, thus making the distance between the T05's 200 feet and added 1,390 feet
of armoring to the north side. The Mining and Reclamation maps have been revised
showing the location of the armoring and the widening of the Lateral Berm. A complete
copy of the revised Exhibit D - Mining Plan as discussed in this section is enclosed.
EXHIBIT E - Reclamation Plan (Rule 6.4.5):
17) As stated in item #8, if two different types of slope reconstruction will be utilized
to achieve 3H:1 V interior slopes for reclamation, you will need to clearly identify
where each type will be used. Please modify the reclamation plan and
reclamation plan map accordingly.
As noted in adequacy item # 8, they will mine vertical and backf ill the slope areas,
instead of using a cut/fill method for all exterior slopes around the reservoirs. For
bonding purposes, the internal working face slopes would be sloped using a cut/fill method
if mining ended prematurely. The Reclamation Plan and Map Exhibit F and Exhibit L have
been revised to reflect this change.
18) Please remove the statement on the top of P23 "There are no drill or auger holes
on the land." There are several monitoring wells already present in the interior of
the permit area.