Landslide Investigation on State Route 7 along the Ohio River
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1 Landslide Investigation on State Route 7 along the Ohio River Peter Narsavage, P.E. DLZ Ohio, Inc. Paul D. deverteuil, P.E. Hull & Associates, Inc.
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3 Site Location
4 Gallia 7 Landslide Area Gallipolis, Ohio Ohio River Project Area
5 Physiographic Provinces
6 Cross-Section 800 BB-1 Sandstone Bluff Vertical Scale Exaggerated 2x Elevation BB-2 Upper Terrace BB-3 SR 7 BB-4 Lower Terrace Lower Slope 500 Legend Silt and Clay, Silty Clay, Clay Sand, Gravel, Silt Shale Claystone Siltstone, Sandstone, Limestone Ohio River EL (Normal Level) EL 485 Bottom of Ohio River
7 Teays River Marietta River Teays River System
8 Pre-Illinoian Glacier Ice Dam on Teays River Lake Tight Formation of Lake Tight Hull & associates, inc.
9 Pre-Illinoian Glacier Cincinnati River Deep Stage River System
10 Cross-Section EL 900 Lake Tight 800 BB-1 Sandstone Bluff Vertical Scale Exaggerated 2x Elevation BB-2 Upper Terrace BB-3 SR 7 BB-4 Lower Terrace Lower Slope 500 Legend Silt and Clay, Silty Clay, Clay Sand, Gravel, Silt Shale Claystone Siltstone, Sandstone, Limestone Ohio River EL (Normal Level) EL 500 Bottom of Deep Stage Cincinnati River EL 485 Bottom of Ohio River
11 Extent of Illinoian Glacier Mew Martinsville River Post Illinoian River System
12 Cross-Section EL 900 Lake Tight 800 BB-1 Sandstone Bluff Vertical Scale Exaggerated 2x Elevation BB-2 Upper Terrace BB-3 SR 7 BB-4 Lower Terrace EL 700 to 750 Post Illinoian Slackwater Lake Lower Slope 500 Legend Silt and Clay, Silty Clay, Clay Sand, Gravel, Silt Shale Claystone Siltstone, Sandstone, Limestone Ohio River EL (Normal Level) EL 500 Bottom of Deep Stage Cincinnati River EL 485 Bottom of Ohio River
13 Extent of Wisconsinan Glacier Ohio River Post Wisconsinan River System
14 Cross-Section EL 900 Lake Tight 800 BB-1 Sandstone Bluff Vertical Scale Exaggerated 2x Elevation BB-2 Upper Terrace BB-3 SR 7 BB-4 Lower Terrace EL 700 to 750 Post Illinoian Slackwater Lake EL 650 to 700 Post Wisconsinan Slackwater Lake Lower Slope 500 Legend Silt and Clay, Silty Clay, Clay Sand, Gravel, Silt Shale Claystone Siltstone, Sandstone, Limestone Ohio River EL (Normal Level) EL 500 Bottom of Deep Stage Cincinnati River EL 485 Bottom of Ohio River
15 Colluvial Slope Formation
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25 Gallia 7 Landslide Area Gallipolis, Ohio Ohio River Area 3 Area 2 Area 1 Project Area
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28 Gallia 7 Landslide Area Gallipolis, Ohio Ohio River Area 3 Area 2 Area 1 Project Area
29 Cross-Section 800 BB-1 Sandstone Bluff Vertical Scale Exaggerated 2x Elevation BB-2 Upper Terrace Phreatic Surface Median Water Level BB-3 SR 7 BB-4 Lower Terrace Lower Slope Ohio River EL (Normal Level) 500 Legend Silt and Clay, Silty Clay, Clay Sand, Gravel, Silt Shale Claystone Siltstone, Sandstone, Limestone
30 Legend BB-2 BB-3 BB-4 CB-2 CB-3 CB-4 CB-5 Inclinometer Displacement vs Time CB-4 Displacement, inch BB-4 Times of increased displacement BB-3 2 CB Jul-99 Dec-99 Jul-00 Dec-00 Jul-01 Jan-02 Jul-02 Jan-03 Jul-03 Jan-04 Jul-04
31 2 Inclinometer Displacement vs Time Legend BB-2 BB-3 BB-4 CB-2 CB-3 CB-4 CB-5 BB-3 Displacement, inch 1 CB-5 Times of increased displacement CB-2 BB-2 0 Jul-99 Dec-99 Jul-00 Dec-00 Jul-01 Jan-02 Jul-02 Jan-03 Jul-03 Jan-04 Jul-04
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33 Precipitation and Ohio River Level Legend Weekly Precip Ohio River Ohio River Elevation, feet Precipitation, inch Jul-99 Dec-99 Jul-00 Dec-00 Jul-01 Jan-02 Jul-02 Jan-03 Jul-03 Jan-04 Jul
34 Cross-Section 800 BB-1 Sandstone Bluff Vertical Scale Exaggerated 2x Elevation BB-2 Upper Terrace Phreatic Surface Median Water Level BB-3 SR 7 BB-4 Lower Terrace Lower Slope Ohio River EL (Normal Level) 500 Legend Silt and Clay, Silty Clay, Clay Sand, Gravel, Silt Shale Claystone Siltstone, Sandstone, Limestone
35 Conclusions There are multiple slides at or above bedrock. Slope movement is greatest near Ohio River and decreases upslope. Rate of slope movement increases after a sudden rise and fall of the Ohio River. Movement of lower slope is triggering slope movement of the lower terrace and then the upper terrace.
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