Profile I - Cross Section at Station E21 January 7, 2009 Bear ... Mineral and Land...Profile I -...
1
? ? 1 in = 10 ft I2 Small lump of D1 debris I10-Spring runs over this station I8 I16-Western edge of left lateral scarp I17-OGS I18-Station at downed tree I0-OGS I5 I6 I7 I9/E21 I11 I12 I13 0.3 ft of D1 debris of medium brown SM with g 0.5 ft of D1 debris of SM I4 I3 I1 Eastern edge of right lateral scarp Bottom of scarp I14 I15 CV7 colluvium of yellow brown SM > 1ft thick, CV7 yellow brown colluvium of clayey silty SM with g and c of STS-CDS, subangular clasts of meta- graywacke and schist up to 1 ft long CV3 Dark brown, organic sandy ML F1 fill with log in it Contact between F1 excavation waste/fill and CV3 colluvium of matrix supported, dark brown, organic sandy ML with roots Contact between D1 debris medium brown SM with g and CV7 colluvium of matrix supported, moist, loose, yellow brown, silty SM with g and c of STS-CDS, subangular clasts of schist and metagraywacke up to 1 ft long. Contact between CV3 dark brown colluvium and CV7 colluvium of matrix supported, moist, loose, yellow brown, silty SM with c of STS-CDS, subang clasts of schist > 2 ft of CV7 colluvium medium brown, loose, moist, sandy ML with few g and c of angular STS clasts 0.7ft of CV7 yellow brown to brown colluvium R - Bedrock of schist (CDEC) Fol: 55/65 Few boulders from excavation waste on surface D1 CV7 colluvium of matrix supported, moist, loose, yellow brown, silty SM with c of STS-CDS, subang clasts of schist CV3 Dark brown sandy ML with rock chips that slid from smaller failure upslope I9-I13 - 2-3 ft thick mound of D1 debris Profile I - Cross Section at Station E21 January 7, 2009 Bear Trail Debris Flow Maggie Valley, Haywood County, NC Bearing = 265 degrees Haywood County Site Dominant Foliation Post-failure ground surface Cross section station Report Date: 12/9/09 Survey: Cloth tape, Brunton, Clinometer EXPLANATION R - Bedrock F1 - Excavation Waste/Fill CV7 - Colluvium, yellow brown SM D1 - Debris from January 7, 2009 Debris Flow Estimated pre-failure ground surface Estimated pre-failure base of fill CV3 - Colluvium, medium to dark brown ML/SM with clay and g, organics View looking upslope Appendix A ABBREVIATIONS c – cobbles CDEC - Rock classification from the Unified Rock Classifica- tion System (Williamson , 1984) CDS – Completely Decomposed State from the Unified Rock Classification System (Williamson , 1984) Fol – Foliation ft – feet g – gravel OGS – Original (pre-2005) Ground Surface STS – Stained State from the Unified Rock Classification System (Williamson , 1984) Subang - subangular Reference: Williamson, D.A., 1984, Unified rock classification system: Bulletin of the Association of Engineering Geologists, vol. XXI, no. 3, p. 345-354. 0ft 20ft 40ft 60ft 80ft 100ft 120ft 3470ft 3480ft 3490ft 3500ft 3510ft 3520ft
Transcript of Profile I - Cross Section at Station E21 January 7, 2009 Bear ... Mineral and Land...Profile I -...
? ?
1 in = 10 ft
I2Small lump of D1 debris
I10-Spring runs over this station
I8
I16-Western edge ofleft lateral scarp
I17-OGS
I18-Station at downed tree
I0-OGSI5
I6I7
I9/E21 I11 I12 I13
0.3 ft of D1 debris of medium brown SM with g
0.5 ft of D1 debris of SM
I4I3I1
Eastern edge of right lateral scarp
Bottom ofscarp
I14 I15
CV7 colluvium of yellow brown SM
> 1ft thick, CV7 yellow brown colluvium of clayey silty SM with g and c of STS-CDS, subangular clasts of meta-graywacke and schist up to 1 ft long
CV3 Dark brown, organic sandy MLF1 fill with log in it
Contact between F1 excavation waste/fill and CV3 colluvium of matrix supported, dark brown, organic
sandy ML with roots
Contact between D1 debris medium brown SM with g and CV7 colluvium of matrix supported, moist, loose, yellow brown,
silty SM with g and c of STS-CDS, subangular clasts of schist and metagraywacke up to 1 ft long.
Contact between CV3 dark brown colluvium and CV7 colluvium of matrix supported, moist, loose, yellow brown,
silty SM with c of STS-CDS, subang clasts of schist
> 2 ft of CV7 colluvium medium brown, loose, moist, sandy ML with few g and c of angular STS clasts
0.7ft of CV7 yellow brown tobrown colluvium
R - Bedrock of schist (CDEC)Fol: 55/65
Few boulders from excavation waste on surface
D1
CV7 colluvium of matrix supported, moist, loose, yellow brown, silty SM with c of STS-CDS, subang clasts of schist
CV3 Dark brown sandy ML with rock chipsthat slid from smaller failure upslope
I9-I13 - 2-3 ft thick mound of D1 debris
Profile I - Cross Section at Station E21January 7, 2009 Bear Trail Debris FlowMaggie Valley, Haywood County, NC
Bearing = 265 degrees
Haywood County
Site
Dominant Foliation
Post-failure ground surfaceCross section station
Report Date: 12/9/09Survey: Cloth tape, Brunton, Clinometer
EXPLANATION
R - Bedrock
F1 - Excavation Waste/Fill
CV7 - Colluvium, yellow brown SM
D1 - Debris from January 7, 2009 Debris Flow
Estimated pre-failure ground surfaceEstimated pre-failure base of fill
CV3 - Colluvium, medium to dark brown ML/SM with clay and g, organics
View looking upslope
Appendix A
ABBREVIATIONS
c – cobblesCDEC - Rock classification from the Unified Rock Classifica-tion System (Williamson , 1984) CDS – Completely Decomposed State from the Unified Rock Classification System (Williamson , 1984) Fol – Foliationft – feetg – gravelOGS – Original (pre-2005) Ground SurfaceSTS – Stained State from the Unified Rock Classification System (Williamson , 1984) Subang - subangular
Reference:
Williamson, D.A., 1984, Unified rock classification system: Bulletin of the Association of Engineering Geologists, vol. XXI, no. 3, p. 345-354.
0ft 20ft 40ft 60ft 80ft 100ft 120ft3470ft
3480ft
3490ft
3500ft
3510ft
3520ft
