APPCOR10291

• Permit No: C1996084
• IBM Index Class Name: Application Correspondence
• Doc Name: LORENCITO CANYON MINE PERMIT REVSION EXHIBIT 8
• Media Type: D
• Archive: No

• Fi«ure =.0~.3-fib ~~as not nro~ idzd. Fur[I?zr. [hz .izsigns for thz "shop building ~. '-supple
buildin_~~. °ba[h housz ~. and'btiicz buildin~~~. describzd in revised Tablz =.Q_?-l as havin;
concrete doors and,'or foutzrs. «zre not providzd. Pleasz provide this infom?ation.
Rzsponse
The htzl and watzr tattl: foundation design is providzd on Figure 3.0.3-7a. Descriptions of
thz buildings that hacz concrete floors and'or foo[ers are provided on revised page_.0~-1=.
Rule 2.0~.3(~) Operation Plan -Ponds, Impoundments and Diversions
8=1. Pond dzsi~ns for the Pl/PZ portal, P3 portal. and Fill 9 wire revizwed and thz followin_~
problems were noted:
P1\P2 Portal pond and fill pond designs (EX l~-1 and 15-13)
~~ ~ Culvzrt and ditch labeline should match E\ L-] zzactl}•
b) The zlecation of the lo~.czst set of holzs disa_rezs with the sedimzntation pond
1` summan .
~ 5
~Sp'9~o~ ~ The stagz-stora_e tablz ~cas not found in the submitted materials
oK ~ Thz hydrograph detention tinx of 4~ minutes seems rather low. Can this bz
increased"
D~ ~ Thz elz~atiun-area-capacity-discharge table indicates a low orifice at a capacity or
31 ac-h but the pond rzsults give a permanent pool of I?=l acre-fi. lVhv?
OK ~ The cuh-zrt at 180+9:} is not on figure E\ 1 ~-l.
6k- g) The Division belizves that the fills at the portals should be protected by ditches
designed to divert the 100 year event. due to the Izngth of time these temporary till
structures will bz in-placz. Also. it .vould be appropriate to refer to these tzmporan
stn[cntres as temporan ovzrburden stockpiles to avoid confusion with designed tills.
~~ tL~ Ditch 8E is missing Yrom table I~-liA
dtf- '~ Thz clzan water diversion ditches are missing from Table 1 ~-13.A
p(! ~ ~Vhzre is thz information przsen[zd for cuhzrt LAR 137+17 in tabular ti?rma['.'
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