APPCOR13427

• Permit No: C1996084
• IBM Index Class Name: Application Correspondence
• Doc Date: 3/3/1997
• Doc Name: ADEQUACY REVIEW LORENCITO CANYON MINE C-96-084
• From: DMG
• To: GREYSTONE DEVELOPMENT CONSULTANTS
• Media Type: D
• Archive: No

Cow to R Portals
* 273+66-281+78 calculation title page should say culvert at 274+66
* culvert 288+83, calculations say 18", tab 6 says 36", 21.73 Q?
* culvert at 319+23, calculations say 96", table says 60"
* culvert at 333+92, calculations say 30", table says 24"
* culvert 360+41 not on map
* no calculations for 347+21-357+41, culvert at 348+91
* culvert at 360+41, calculations say 60", table says 48"
* smaller than minimum design values aze shown
* calculations are labeled 319+23 but should be labeled 309+10
* 309+10-317+10 ditch design should be 4.76/1.19
* 319+23-329+24 ditch design should be 4.711.17
* culvert 333+92, 24 inch size is inaccurate
* culvert at 302+06 is footnoted for 20 year event, calculations for 10 yeaz
* calculations and table do not match for last four table entries
* 268+25-275+51 table 4.9/1.21 calculations 4.2511.06
* calculations for culvert 281+51 but not in table
* .culvert 292+61 table says 60", calculations say 54"
* above RI/R2, culvert not on map
Lorencito Haul Road
Generally, the calculations were very hard to correlate to the table. This section should
be reviewed and reworked overall for accuracy. Specific problems noted are as follows:
* culvert 41+97 not in table
* culvert 65+75 should be removed from map?
* culvert 61+27 should be 24" in table
* culvert 75+45 calculation sizing, table sizing disagree
* culvert 82+86 108" culvert requires 20 yr event, 503.74 is 10 yr
* culvert 98+44 calculations aze missing
* culvert ]OS+32 calculations and table sizing disagree
* culvert 122+74 need 20 yeaz sizing, 502 cfs is 10 yeaz
* calculations give culvert 112+OQ table and map 1 l 1+00
* calculations for 112+00 say 24", table says 30"
* culvert 134+77 sizing calculations are missing
* 137+48-139+48 should be 4/1 not 5/1.24 w/d respectively
* sizing calculations missing above Pl/P2 portal
* table missing a variety of information
Lorencito Access Road
* no culverts shown till 2299
* calculations for 23+00 but not on map
* 25+>0-32+00 1.7/1.73 table, 6.9/1.73 calculations