RS-14-006, Clinton, Unit 1, Updated Safety Analysis Report, Revision 16, Chapter 2 - Site Characteristics, Figure A2.5-1 Through Figure C2.5-23
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Key to Boring Logs Samples 23 Indicates Standard Penetration Test Value SS Indicates Sample Obtained Using a Standard Split Spoon ST Indicates Shelby Tube Sample Obtained Using a 3.0 inch diameter Shelby Tube PR Indicates Sample Obtained Using a Pitcher Sampler (3.0 inch outer diameter)
CR Indicates Sample Obtained with 4.0 inch outer diameter Core Sampler OB Indicates Sample Obtained Using an Osterberg Sampler (3.0 inch sample diameter) AG Indicates Auger Boring; No Standard Penetration Values or Samples Obtained Unless Specially Noted BG Indicates Bag Sample Obtained HR Indicates Sample Obtained with High Recovery Barrel Test Data Qu/2 Indicates 1/2 Unconfined Compressive Strength (Equal to Shear Strength) in P.S.F. 0.50 Value with no Asterisk is Obtained From RIMAC Test 0.50* Value with Asterisk is Obtained from Pocket Penetrometer Test Reported Elsewhere C Consolidation Test COMP Bulk Compaction Test MA Mechanical Particle Size Analysis (Sieve and Hydrometer) PERM Laboratory Permeability Test SA Sieve Analysis TX/CU/PP Consolidate-Undrained Triaxial Compression Test with Pore Pressure Measurement TX/UU/R Unconsolidated-Undrained Triaxial Compression Test on Remolded Samples DR Relative Density Test UC/R Remolded Samples
All Elevations Refer to Feet Above Mean Sea Level (MSL)
CLINTON POWER STATION UPDATED SAFETY ANALYSIS REPORT Figure A2.5-29 KEY TO BORING LOGS
Site Stratigraphic Column
Notes 1. Vertical scale does not represent either relative thickness or stratigraphic units or relative duration of time interval. 2. Excavations for the Clinton Power Station did not extend below the unaltered Glasford Formation. 3. Illinoian-age till of the Glasford Formation was subjected to a significant period of weathering during the Sangamonian Stage and Altonian Substage. 4. Deposits of Cahokia Alluvium and Henry Formation were not differentiated; reported approximate thicknesses of each unit represents a combined thickness for both deposits. 5. The Holocene Stage is represented by a significant period of weathering and development of agricultural soil profiles. 6. The Cahokia Alluvium and Henry Formation were mapped as a single unit. The Cahokia Alluvium is Holocene and, quite possibly, in part Valderan/Twocreekan in age; the Henry Formation is Woodfordian (probably early) in age. The Wedron Formation is probably early Woodfordian. 7. Locally, the Peyton Colluvium rests directly on the Glasford Formation. Stratigraphic Description Stratigraphic Unit Approximate Thickness General Description Cahokia Alluvium 0-35 feet Alluvium: Poorly sorted silt, clay, and silty sand with lenses of sand and gravel. (CL to SM) Peyton Colluvium 0-10 feet Colluvium: Brown clayey silt with minor amounts of gravel. (ML to CL) Richland Loess 0-10 feet Loess: Brown clayey silt, trace fine sand. (ML to CL) Henry Formation 0-33 feet Glacial outwash: Yellow-brown fine to coarse sand and gravel, with pockets of gray-brown silt, sandy silt, and silty clay. A lag gravel is often present at the base. (SM, SW, SP, SM-SW, SP-SW) Wedron Formation 20-55 feet Till: Brown silty clay to clayey silt, some interspersed fine to coarse sand, trace fine to coarse gravel, with pockets of brown fine sand, sometimes silty, trace fine gravel. Grades to gray clayey silt, some fine to coarse sand, trace fine gravel with pockets of fine to coarse gray sand, trace fine gravel. (ML to CL) Robein Silt 0-2 feet Loess (deposited in water): Dark brown organic silt, trace clay, trace fine sand.
Locally consists of peat. (ML to CL) Weathered
Glasford Formation 10-15 feet Till: Gray silt grading to clayey silt, trace fine sand. Grades to gray-green silty clay or clayey silt, some fine to coarse sand, trace fine to coarse gravel. More sand and gravel with depth. Slightly to highly calcareous. (ML to CL) Unaltered Glasford Formation 90-140+ feet Till: Dark gray clayey silt, some interspersed fine to coarse sand, highly calcareous, trace fine to coarse gravel with pockets of gray sand, fine to coarse. (ML-CL to SM) CLINTON POWER STATION UPDATED SAFETY ANALYSIS REPORT Figure C2.5-1 Page 2 of 2 SITE STRATIGRAGHIC COLUMN Comparison of Terminology Used For The FSAR and PSAR
Notes 1. The Cahokia Alluvium, Peyton Colluvium, and Henry Formation consist of alluvial and outwash deposits and are confined to the valley of the North Fork of Salt Creek. 2. Vertical scale does not represent either relative thickness of stratigraphic units or relative duration of time interval.
Stratigraphic Units Time Stratigraphy FSAR PSAR Holocene Stage Cahokia Peyton Alluvium Colluvium Salt Creek Alluvium or Flood Plain Alluvium and Recent Channel Deposits Valderan Substage Twocreekan Substage Richland Loess Loess Woodfordian Substage Wedron Formation Henry Formation Farmdalian Substage Robein Silt Wisconsinan Till or Wisconsinan Glacial Till Wisconsinan Stage Altonian Substage Sangamonian Stage Weathered Glasford Formation Interglacial Zone or Sangamon Interglacial Zone or Sangamon Soil Interval Illinoian Stage Unaltered Glasford Formation Illinoian Till or Illinoian Glacial Till CLINTON POWER STATION UPDATED SAFETY ANALYSIS REPORT Figure C2.5-2 COMPARISON OF TERMINOLOGY USED FOR THE FSAR AND PSAR