REP39823

• Permit No: M1973021
• IBM Index Class Name: Report
• Doc Date: 3/3/2006
• Doc Name: Geotechnical Addendum for 2005 Annual Report
• From: Aggregate Industries
• To: DMG
• Permit Index Doc Type: Stability Report
• Media Type: D
• Archive: No

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Fleltl Mapping Dafa
Aggregate Intlustdes Momson Quarry
North Quarry
By: Lyman Henn, Inc.
17 January 2006
Station Description Bearing Dip
From To
Bench 1 W¢st Wall Mapped highvr911 above bench. Highwall 40 h high.
Motlemtely to highly weathered schist. Foliation dips into highwall and is generally favorable for slope stability.
However, the potential for raveling antl small block failures still exists in loralizetl areas of the highwall. Much of the
highwall is covered by debris pmng over the fop of the highwall from the fill area at fhe top of fhe quarry.
Bench A West Wall Mapped highwall above bench. Highwal140 h high.
Moderately to highly weathered schist Seam about 100' long mnginq from 5' high al south end Io 20' high at north end.
7'to 3'thick with minor day inflling. Dips into highwall. Foliation dips into highwall and is generally favorable for slope
0+00 0+75 stability. '
0+04 Joint N 45 W 58 NE
0+20 Joint N 90 E 34 6
Blocky,bmken, highlyjoinled. moderately weatheretl rock. Poorly foliated, but foliation generally tllps into wall. Potential
0+15 ]+00 for raveling, loose blacks.
2*00 Foliation: weathered, vnth thin clay infill. N 67 W 21 SW
2+00 Joint N 39 E 85 NW
2+15 Joint N 63 W 60 SW
1+90 2+20 Promnenk near vedipl Joint.
3+25 Foliation N 13 E 50 NW
3+20 Joint N 66 W 86 NE
5*25 Foliation N 47 W 19 SW
6+9p Joint N 86 E 60 N
]+00 Foliation N 40 W 29 SW
Bench B North Wall Mapped highwall above bench. Mighwa1140 ft high.
3+64 4+90 Very broken, blocky rock. Previous planar joint (3+64) dives up Subpamllel to highwall into slope. Rock outside of
hitltlen joint is likely unstable. Filiation is variable; not measured.
Secontlary cant. N 30 W ]0 SW
Sewndary IdnL N 55 E Vertical
Sepndary joints sprrewhat consistent, near verfipl, planar, rough to sem-rough, fresh.
4+90 5+15 Thinly foliated, tightly jointeq rtaderalely weahered gneiss. Foliation dips generally west, subparallel to highwall without
a wnsistent component either into or out of the highwall.
Foliation N 40 W 20 SW
Foliation N 40 W 16 SW
5*15 6+28 GYay seam expressed on highvrall. Seam cuts down through highv211 from east to west. tlipPing west subpamllel to
highwall. Potential historic slip plane. Seam is 3'to9'thick antl consists of red dog dry at exposures. Polentiai small
scale block failures at upper entl where seam is exposetl in bench above.
Clay Seam N 25 W 35 SW
Clay Seam N 35 W 19 SW
6+28 6+75 Sirdlar charades End of hi hwall at station 6N5.
Bench 8 W¢st Wall Mappetl highwall above bench. Highwall 40 h high.
0+00 3.00 Blocky, highly lointetl rock. Close foliation which consistently dips into slope. $eamdary joints consistently near vertical
antl tlip out of slope. Potential for raveling antl small scale sliver failures hum secondary loinls. Foliation is generally
favorable for slope stability.
0+30 Foliation NsOE 245W
0@0 Joint N 60 W ]4 NE
1+]3 Foliation N SO W 10 SW
2+64 Foliation N 70 W 20 SW
3+00 6+00 Inpnsistent, ood develo tl Poliation. Simlar trend as reNOUS sedip.
Bench C North Wall Mapped highwall above bench. Nighv21140 h high.
5+00 6+g0 Blocky rock. Poorly develgped fellation, inconsistent secondary joint sets. Joints fresh to slightly weathered, often open
tlue to blasting. Potential for raveling, srpll style sliver failures frompints, adverse foliation is localized.
5+00 Foliation N 66 W 535
5+10 Joint N 62 W 84 N
5N5 Joint N40W Vertical
fi+60 Joint N 19 E 83 NW
6*90 6+15 Foliation becomes rtgre promnent, npderately to highly foliated, One significant secondaryjoinl set. Joints slightly to
moderately weathered, but no day intilling. Foliation generally tlips PUt of welt posing potential for wedge antl block
failures. However, failures are unlikely to extend beyond bench limits.
Bench C West Wall MaPPetl highwall above bench. Highwall 60 ft high.
0+00 2+00 Blocky, highly lointetl rock. Close foliation consistently dips into slope. Secontlaryjomts near venipl antl tlip out of
slope. Potential for raveling and srtkallsple sliver faiWresfrom Secontlary joints. Foliation is generally (avo2ble fa
slope stability
0+70 Joint N ]5 W 6B NE
1+20 Foliation N 6] W 23 SW
2*pp 4+00 Becnrtupq tightly(oliateq slightly to nroderately weatheretl.
2*00 FPLahop N65E 345W
2+00 Joint N 6] W )5 NE
ile: GProIecLJl0200A0Brz005/Rock Mass Data xis