DRC-2018-004275 - 0901a0688080af3d

DRC-2DtS-oo42. 7s
Dam Safety Inspection
Facility Energy Fuels White Mesa Mill -Conventional lmpoundment 4A Storage Level 17' · -----------Date April 16, 2018 Weather _Ov_e_rca __ st""'...;.6_5._F'"",_li ... gh...;.t;...b;;...;r...;;.eez.;;.;;..;e'-------------------
People Present
Russ Topham DEQ
Heather Mickelson DEQ
Garrin Palmer EFRI
Tanner Holliday EFRI
Detail
''M'-· ~ft, --ffi ..
1. Crest X
2. Upstream Slope X
3. Downstream Slope X
4. Groins X
11. Freeboard X
12. Intake X
13. Concrete Structures X
14. Stilling Basin X
15. Outfall Channel X
16. Conduit X
17. Intake X
18. Stilling Basin X
19. Discharge Channel X
20. Controls X
X
22. Monuments X
23. Staff Gage X
24. Piezometers X
25. Drains X
26. Other X
Notes
2. Upstream slope is covered with a flexible membrane liner.
3. Downstream face is starting to show erosion rills. Erosion had not proceeded to a point requiring immediate
attention. Grooming the slope at this time would remove the established plant community aloing with its roots.
This would actually accelerate erosion. Energy Fuels should monitor the slopes and repair once rills start head
cutting near crest or reach about 6" in depth, whichever happens first. See Photo 10 as typical.
7. Upstream toe is obscured by tailings.
10 lmpoundment bottom is obscured by tailings.
Dam Safety Inspection
Facility Energy Fuels White Mesa Mill -Non-conventional lmpoundment 48 Storage Level _1_7_' ---------
Date April 16, 2018 Weather _Ov_e_rca_st __ ,_6_5._F ..... ,_li ... gh_t_b_r_ee_z_e _________________ _
People Present
Russ Topham DEQ
Heather Mickelson DEQ
Garrin Palmer EFRI
Tanner Holliday EFRI
Det ail
~~
1. Crest ·x
2. Upstream Slope X
3. Downstream Slope X
4. Groins X -liiii ·:-iul,J i."~ '!_Ill 't':. ·: .. -II ..'.L.{. .U:,/ ~ !Iii ··.flt ; :. .. , • .. ' ..
5. Left Abutment X
6. Right Abutment X
7. Upstream Toe X
8. Downstream Toe X
·,: ' _.. !. 11'1 :!lb
~,: -• ; -' ··.-,. l, i·':-,: """'-"'-,,., .,,, _!!I ' .• .. ., _., • ·:.; I' = fu
9. Shore Stability X
10. Reservoir Bottom X
·Ir~~ " c"v In~ ·~ "''::!Cl! l:Jlll ,. ~ ,'11,,.lt '
11. Freeboard X
12. Intake X
13. Conaete Structures X
14. Stilling Basin X
15. Outfall Channel X ~-¥/· ~; !!i II ·-· " 1~·· -• _J .: ! n·· ,, Ill~ .. ,, ' ,:...JI' 'A,' ·fa -~ ;, -•. .n
16. Conduit X
17. Intake X
18. Stilling Basin X
19. Discharge Channel X
20. Controls X
21. Venting X , .. -~ .-.,·,, .. , .. "!:'.':!'w.· .... . d' ' -.. ~~ill''°::'"°~ -: {<_ 'j, -11111 ;. -~-
22. Monuments X
23. Staff Gage X
24. Piezometers X
25. Drains X
26. Other X
Notes
2. Upstream slope is covered with a flexible membrane liner.
3. Downstream face is starting to show erosion rills. Erosion had not proceeded to a point requiring immediate
attention. Grooming the slope at this time would remove the established plant community aloing with its roots.
This would actually accelerate erosion. Energy Fuels should monitor the slopes and repair once rills start head
cutting near crest or reach about 6" in depth, whichever happens first. See Photo 10 as typical.
7. Upstream toe is obscured by tailings.
10 lmpoundment bottom is obscured by tailings.