HomeMy WebLinkAbout777 E Lincoln Ave - Special Inspections/Engineering - 07/17/20144396 GREENFIELD DRIVE
WINDSOR, COLORADO 80550
(970) 545-3908 FAX (970) 663-0282
EARTH ENGINEERING
CONSULTANTS, LLC
July 17, 2014
Mortenson Construction
999 18th Street
Suite 1605N, North Tower
Denver, Colorado 80202
Attn: Ms. Emily Peddicord (emily.peddicord@mortenson.com)
Re: Summary of Site Observations
Milk House Relocation Foundations
Woodward LNG Campus
Fort Collins, Colorado
EEC Project No. 1134110
Ms. Peddicord:
The purpose of this letter is to summarize the observations completed by Earth
Engineering Consultants, LLC (EEC) personnel during construction of the foundation for
the relocation of the milk house at the referenced project. Those foundation observations
included observation of overexcavation and placement of structural fill for development
of the foundation bearing/subgrade, observation of reinforcing steel placement, and
observation and testing of cast-in-place concrete for the monolithic slab.
At the time of subgrade overexcavation, EEC personnel observed overexcavation of the
area of the milk shed to the top of an underlying sand and gravel layer to remove
essentially cohesive subgrade materials. EEC personnel also observed the structural
backfill that was placed in this area. The materials placed were consistent with the
recommendations outlined in our geotechnical report for this project.
EEC personnel observed the reinforcing steel placement for the monolithic slab
foundation with photographs of the reinforcing steel attached. At the time of concrete
placement, EEC personnel performed field checks on the plastic concrete and cast
cylinders for laboratory compressive strength testing. Result of the field tests on the
plastic concrete and results of compressive strength tests on the cured cylinders are
indicated on the attached summary sheet.
EEC Project No. 1134110
July 17, 2014
Page2
Earth Engineering Consultants, LLC
Based on observation and testing completed by EEC personnel as outlined above and
documented on the attached photographs/summaries, it is our opinion the milk house
foundation was constructed in general accordance with the Structural Milk House Plan
and Details, sheet number SB4-01-0 I, prepared by Ghafari and Associates, LLC, dated
12/ 13/2013 (document release number 3).
If we can be of further service to you on the project, please do not hesitate to contact us.
Very truly yours,
Earth Engineering Consultants, LLC
Lester L. Litton, P .E.
Principal Engineer
Reviewed by: Ethan P. Wiechert, P .E.
Senior Project Engineer
LLL/EPW/dla
WOODWARD LNG CAMPUS
FORT COLLINS, COLORADO
EEC PROJECT NO. 1134110
JULY 2014
MILK HOUSE FOUNDATION REINFORCEMENT
PHOTO #1
PHOTO #2
Placement Date:
Placement Location: -
Concrete Supplier:
B
D
D1
D2
Project Number:
Next Level Development - Wayne Timura: wtimura@nldevelopment.com
Ghafari Associates - Matt Kraft: mkraft@ghafari.com
Mortenson - Emily Peddicord: emily.peddicord@mortenson.com
Mortenson - Matt Simper: matt.simper@mortenson.com
Fiore and Sons - Justin Russell: jrussell@fioreandsons.com
Bestway
Type
Report Distribution:
Woodward - Steve Stiesmeyer: steve.stiesmeyer@woodward.com
Average
(in2) (psi) (psi)
Strength Strength
(in)
Compressive
Type of Placement:
Ticket Number: 1042725 Truck Number:
EARTH ENGINEERING CONSULTANTS, LLC
REPORT OF CAST-IN-PLACE CONCRETE TESTS
GENERAL INFORMATION
1
Air Temperature at Placement (deg F) ----
Compressive
Area Failure
Cylinder
Diameter
(in)
COMPRESSIVE STRENGTH OF FIELD CAST TEST SPECIMENS (ASTM C39/C31)
Specimen Height
Maximum
Date Age
Project:
Relative Yield
Water Cementitious Ratio (w/c)
EEC Technician:
Yards: 6.5 of
JK
7:57 AM Sample Time: 8:30 AM
Required 28 Day Compressive Strength (psi): 3000
Batch Time: 13
1
Test No.:
Compressive Test No.: C
2/18/2014
None
Hand
640
Mix Code: 303149 Water Added on Site:
FIELD TEST DATA
RESULTS
Unit Weight (pcf)
SPECIFICATIONS
ASTM C1064 90° Max
6%
Concrete Temperature (deg F) 67
4"
----
TEST
Slump (in) ASTM C143
Applied Load
Cylinder
Tested (days) (lbs)
Air Content (%) ASTM C231
1134110
C1 03/18/14 28 57570 8
Woodward - Site Overlot
12.57
4580
4
C1 03/18/14 28 57950 8 4 Shear 4610
C1 03/18/14 28 57000 8 12.57
Milk Shed Slab
Bestway
4
Shear 4540
02/25/14 7 45050 3590
Comments:
Comments:
Shear 4580
12.57
C1 8 4 12.57 Shear 3590
ASTM C138
Yield (CY)
Number