2016-03-28_REPORT - M1980149

• Permit No: M1980149
• IBM Index Class Name: Report
• Doc Date: 3/28/2016
• Doc Name: Report Summarizing
• From: Brierley Associates
• To: DRMS
• Email Name: PSH
• Media Type: D
• Archive: No

BRIERLEY DAILY FIELD REPORT
ASSOCIATES
Creating ipoce Unew9couno
' Project Hokestra-North Slurry Wall Report No. 6
Location Firestone, CO Date Wednesday, May 01, 2013
Client Hall-Irwin Page 2 of 4
Contractor Hall-Irwin File No. 112206-000
Weather Windy with Snow Showers Temperature Very Cold(0°-32°)
Quality Location or Batch Results Comments
' Control 7T
Soil-Bentonite Backfill
Unit Weight 8+10, 8+85 119.6, 120.4 pcf
' Slump 8+10, 8+85 6.00, 4.75 inches
-200 Wash 8+10 5 1.1% passing No. 200
t Triaxial
Permeability Next sample to be taken at station
15+00
Test
Cement Stabilized Soil-Bentonite Backfill(when applicable)
Unit Weight XX pcf N/A
Slump XX inches N/A
Gradation XX% passing No. 200 N/A
Verified Depth
Verified ® Yes
Clean AM ❑ No
Backfill
Slope and
' Bottom of
Key
® Yes 8+85--*9+20,9+20—>9+55,
Verified ❑ No 9+55--+9+90,9+90-->10+25, 4ft key(23 ft total depth),4ft key
Depth To 10+25--*10+60 (23 ft total depth),4ft key(21 ft
Bedrock and total depth),4ft key(21 ft total
Key depth),4ft key(23ft total depth)
Bedrock Samples Top: 8:30 AM, 10:00 AM, 11:30
Frequency = Once per 100LF of 9+90 AM,2:33 PM,3:57 PM
slurry wall Bottom:9:15 AM, 11:00 AM,
' 12:30PM,3:OOPM,4:45 PM
Average Excavation Time of Bedrock 0.80 Hrs
per Set
III. NOTES:
' 1. Hall-Irwin(HI)on-site using a Komatsu PC 800 Excavator to remove alluvium material from the slurry
trench. Fresh slurry was placed within trench as work progressed up-station to keep the walls of the
trench from collapsing. Backfill material was mixed and placed throughout the day.