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. HullHull& associates, inc. HullHull& associates, inc. Site Location HullHull& associates, inc. Gallia 7 Landslide Area Gallipolis, Ohio Ohio River Project Area Hull & associates, inc. Physiographic Provinces HullHull& associates, inc. Cross-Section Vertical Scale Exaggerated 2x BB-1 Sandstone 800 Bluff Upper 700 Terrace BB-2 Lower SR 7 Terrace Elevation BB-3 600 BB-4 Lower Slope Ohio River EL 537.3’ (Normal Level) 500 Legend EL 485’ Bottom of Ohio River Silt and Clay, Silty Clay, Clay Shale Sand, Gravel, Silt Claystone Siltstone, Sandstone, Limestone HullHull& associates, inc. Teays River Teays Marietta River River System HullHull& associates, inc. Pre-Illinoian Glacier Ice Dam on Teays River Formation of Lake Lake Tight Tight HullHull& associates, inc. Pre-Illinoian Glacier Deep Stage Cincinnati River River System HullHull& associates, inc. Cross-Section EL 900’ Lake Tight Vertical Scale Exaggerated 2x BB-1 Sandstone 800 Bluff Upper 700 Terrace BB-2 Lower SR 7 Terrace Elevation BB-3 600 BB-4 Lower Slope Ohio River EL 537.3’ (Normal Level) 500 EL 500’ Bottom of Deep Stage Cincinnati River Legend EL 485’ Bottom of Ohio River Silt and Clay, Silty Clay, Clay Shale Sand, Gravel, Silt Claystone Siltstone, Sandstone, Limestone HullHull& associates, inc. Extent of Illinoian Glacier Mew Martinsville River Post Illinoian River System HullHull& associates, inc. Cross-Section EL 900’ Lake Tight Vertical Scale Exaggerated 2x BB-1 Sandstone 800 Bluff Upper 700 Terrace EL 700’ to 750’ Post Illinoian BB-2 Slackwater Lake Lower SR 7 Terrace Elevation BB-3 600 BB-4 Lower Slope Ohio River EL 537.3’ (Normal Level) 500 EL 500’ Bottom of Deep Stage Cincinnati River Legend EL 485’ Bottom of Ohio River Silt and Clay, Silty Clay, Clay Shale Sand, Gravel, Silt Claystone Siltstone, Sandstone, Limestone HullHull& associates, inc. Extent of Wisconsinan Glacier Post Wisconsinan River Ohio River System HullHull& associates, inc. Cross-Section EL 900’ Lake Tight Vertical Scale Exaggerated 2x BB-1 Sandstone 800 Bluff Upper 700 Terrace EL 700’ to 750’ Post Illinoian BB-2 Slackwater Lake Lower EL 650’ to 700’ Post SR 7 Terrace Wisconsinan Slackwater Lake Elevation BB-3 600 BB-4 Lower Slope Ohio River EL 537.3’ (Normal Level) 500 EL 500’ Bottom of Deep Stage Cincinnati River Legend EL 485’ Bottom of Ohio River Silt and Clay, Silty Clay, Clay Shale Sand, Gravel, Silt Claystone Siltstone, Sandstone, Limestone HullHull& associates, inc. Colluvial Slope Formation HullHull& associates, inc. HullHull& associates, inc. HullHull& associates, inc. HullHull& associates, inc. HullHull& associates, inc. HullHull& associates, inc. HullHull& associates, inc. HullHull& associates, inc. HullHull& associates, inc. HullHull& associates, inc. Gallia 7 Landslide Area Gallipolis, Ohio Area 3 Area 2 Area 1 Ohio River Project Area Hull & associates, inc. HullHull& associates, inc. HullHull& associates, inc. Gallia 7 Landslide Area Gallipolis, Ohio Area 3 Area 2 Area 1 Ohio River Project Area Hull & associates, inc. Cross-Section Vertical Scale Exaggerated 2x BB-1 Sandstone 800 Bluff Upper 700 Terrace Phreatic Surface BB-2 Median Water Level Lower SR 7 Terrace Elevation BB-3 600 BB-4 Lower Slope Ohio River EL 537.3’ (Normal Level) 500 Legend Silt and Clay, Silty Clay, Clay Shale Sand, Gravel, Silt Claystone Siltstone, Sandstone, Limestone HullHull& associates, inc. Inclinometer Displacement vs Time 10 Legend CB-4 9 BB-2 BB-3 BB-4 8 CB-2 CB-3 7 CB-4 CB-5 6 5 4 Displacement, inch Displacement, BB-4 displacement 3 BB-3 Times of increased CB-3 2 1 0 Jul-99 Dec-99 Jul-00 Dec-00 Jul-01 Jan-02 Jul-02 Jan-03 Jul-03 Jan-04 Jul-04 HullHull& associates, inc. Inclinometer Displacement vs Time 2 Legend BB-2 BB-3 BB-3 BB-4 CB-2 CB-3 CB-4 CB-5 CB-5 1 Displacement, inch Displacement, CB-2 displacement Times of increased 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 HullHull& associates, inc. HullHull& associates, inc. Precipitation and Ohio River Level 10 560 Legend 9 Weekly Precip 555 Ohio River 8 550 7 545 6 540 Ohio River Elevation, feet 5 535 4 530 3 525 2 520 Precipitation, inch Precipitation, 1 515 0 510 Jul-99 Dec-99 Jul-00 Dec-00 Jul-01 Jan-02 Jul-02 Jan-03 Jul-03 Jan-04 Jul-04 HullHull& associates, inc. Cross-Section Vertical Scale Exaggerated 2x BB-1 Sandstone 800 Bluff Upper 700 Terrace Phreatic Surface BB-2 Median Water Level Lower SR 7 Terrace Elevation BB-3 600 BB-4 Lower Slope Ohio River EL 537.3’ (Normal Level) 500 Legend Silt and Clay, Silty Clay, Clay Shale Sand, Gravel, Silt Claystone Siltstone, Sandstone, Limestone HullHull& associates, inc. 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. HullHull& associates, inc..