Tennessee Valley Authority — Technical Presentation (September 2018)

4 slides from Tennessee Valley Authority's technical presentation, Sep 26, 2018

Slide 1: Safety is TVA's number one priority during any fluctuation of lake levels
SAFETY IS TVA’S NUMBER ONE PRIORITY DURING ANY FLUCTUATION OF LAKE LEVELS SIGNIFICANT FLUCTUATIONS IN THE LAKE LEVELS MAY BE EXPECTED DURING A PERIOD OF OBSERVATION AND EVALUATION PLANNED AT THE END OF WALL CONSTRUCTION TENNESSEE VALLEY AUTHORITY THE OBSERVATION AND EVALUATION DIVISION OF LAND & RIV
Slide 2: Reservoir Observation and Evaluation: Reservoir Pool Elevation in Feet
RESERVOIR OBSERVATION AND EVALUATIO RESERVOIR POOL ELEVATION IN FEET 2021 2022 1390 PERIOD OF OBSERVATION AND EVALUATION USUAL SUMMER POOL, APPROXIMATE ELEVATION 1382 1380 BLUE-SHADED AREA SHOWS FLOOD OPERATING GUIDE CURVE POTENTIAL PERIOD AND POTENTIAL RANGE OF LAKE LEVELS DURING RESERVOIR TESTING
Slide 3: Upstream at pool elevation of 1382: site conditions present summer 2020
W UPSTREAM AT POOL ELEVATION OF 13 PERPOSED ON SITE CONDITIONS PRESENT SUMMER 20 TOP OF P UPSTREAM “APRON” SLO STABILITY E APPROX EL 1365 BERM APPROX EL 1398 L. 1382 E TENNESSEE VALLEY AUTHORITY DIVISION OF LAND & RIVER MANAGEMENT DAM SAFETY SECTION
Slide 4: Dam cross-section: cutoff wall, berms and grouting
Crest Restoration Cutoff Wall Upstream Stability Berm Downstream Stability Berm 2014 Sinkhole 1951 Grout Curtain Slurry-Containment Grouting Karst Limestone Foundation Rock Deep Bedrock Grouting Tailwater TENNESSEE VALLEY AUTHORITY DIVISION OF LAND & RIVER MANAGEMENT DAM SAFETY SECTION