WPC  2"B Z`XArial ItalicArialArial BoldHP LaserJet 4 PlusIIHPLA4PLU.PRS2xCQ\'sZX#|E9ND,C2xjAG;XF1mC9,  Xm2PG;XP/qC:,cXq2pPG;X2n T|TOO "4^DDV6OOYAOAADDAwDADn6wD66w6RwDwwwuR?ROAnOOODOOOOOOuOAwCCCCCCCCwwwwwwA6AAA6AAgww6A6[6RRRwwwwTDDwuuu6RwDwwDu414WddddddddddddddddddddddddddddddddddddddddNTT~PYVPTO33PPPPTTyuu3OuO"uu~uu"m+^99Ipp.DDNt9D99pppppppppp99tttp̅}9ep}}999\p.ppepp9pp..e.ppppDe9peeeeE5EtD9sZDDD9DDDDDDpD|9pppppȰepppp99999999pppppppppepp|pepppppeeee|pppppppppppp9.999.99Xeep.p:p.pDp.pxppppȼDDDeeee}L}9}9ppppppe}e}e}epp.pDe}9ee|pp8dp,(,WddddddddddddddddddddddddddddddddddddddddNHxxHlpD|pppppLJpDHpD,,DDpDDxppxHxxHsdd,DdD"dxdldtxxd"m+^:D`pp8DDLt8D88ppppppppppDDttt|Đ|8p|||D8Dtp8p|p|pD||88p8||||LpD|pppdL8LtD8ttDDD8DDDDDDpD|8pppppȰppppp88888888|||||||||pp|||p||ppppppppppp||||||||88888888ppp|8|L|8|`|8|||||ȼLLLpppp|`|D|D||||||p|d|d|d||8|Lp|Dpp||:dp,0,WddddddddddddddddddddddddddddddddddddddddNHxxHppD|pppppLHpDPpD88ddpDDxppxHxxHs||8ddD"dxxldtxxd2  P #Xp2PQ XP#e  yxdddy Jicarilla Lower Mundo|'`v(#5Conceptual Design    VII.XX` ` ENVIRONMENTAL CONSIDERATIONS (#` XX` ` The construction alternatives for the Lower Mundo Lake Dam safety program will have some environmental consequences. Some of these environmental consequences will require mitigating actions to remedy their impacts to the environment. Both the physical environmental and cultural environment will have environmental impacts as a result of the dam safety improvements.(#`  RE XX` ` A.X Environmental Consequences(#  R XX` ` 1.X Draining the Lake(# ` ` X The lake must be drained for the remove and replace and upstream slurry cutoff foundation remediation options. Therefore, this will have a negative impact on fish populations, migratory birds and other wildlife that use Lower Mundo Lake as a water source. (#  R XX` ` 2.X Groundwater/Surface Water Impacts(# XX` ` X A wetland exists at the downstream toe of the dam. Seepage through the dam is likely a source of the shallow groundwater that supports this wetland. Reducing this seepage, which would be a result of all three foundation remediation options, may have a detrimental effect to this wetland.(#  Rr# XX` ` 3.X Construction Impacts(# XX` ` X Construction related contamination of the creek will occur. Also, there will be some impact on air quality from construction vehicle',(( exhaust fumes and there is a possibility of impact from fugitive dust from topsoil and other soil stockpiles.(# XX` ` X Possible borrow sources on the Reservation will have to be investigated.(# XX` ` X For the options using bentonite slurry, the excess must be disposed of to eliminate contamination.(#  RE XX` ` B.X Mitigations Required(#  R XX` ` 1.X Draining the Lake(# XX` ` X Due to draining the lake, the fish will have to be replaced after construction.(# ` ` 2. Groundwater/Surface Water Impacts XX` ` X Due to possible loss of the wetland, some mitigation may be required. (# X(#  R XX` ` 3.X Construction Impacts(# XX` ` X Construction mitigation will require borrow areas to be located, operated, and drained to minimize erosion and sediment transport into streams.(# XX` ` X Mitigating actions to avoid contamination of the creek below the dam will include the development and strict application of a Stormwater Runoff Plan. This would be identified in the construction effort.(# ',((ԌXX` ` X No mitigating actions will be required for the impact from vehicle exhausts. Mitigating actions for prevention of fugitive dust include standard construction practices, such as sprinkling or covering to control fugitive dust, which will be required of the contractor.