HomeMy WebLinkAboutCT 06-06; LA COSTA OAKS NEIGHBORHOOD 3.7; PAVEMENT RECOMMENDATIONS;GEOCON
INCORPORATED
GEOTECHNICAL • /, - 7 ENVIRONMENTAL •'MATERIALS )
Project No. 06105-52-24B
July 19, 2010
CoiRich
4747 Morena Boulevard, Suite 100
San Diego, California 92117
Attention: Ms. Terri Shusterman
Subject: VILLAGES OF LA COSTA
THE OAKS NORTH - NEIGHBORHOOD 3.3 NORTH
COLINA CERRO - STATIONS 10+00 THROUGH 16+50
SITIO CALIENTE - STATIONS 16+50 THROUGH 28+00
CORTE FORTUNA -STATIONS 17+00 THROUGH 2 1+00
CARLSBAD, CALIFORNIA
PAVEMENT RECOMMENDATIONS
Dear Ms. Shusterman:
In accordance with the request of Mr. Kirk Philo, your onsite superintendent, we obtained subgrade
soil samples from the subject roadways. After collection, we performed Resistance Value (R-Value)
tests on the samples. Based on conversations with the project civil engineer from Hunsaker and
Associates San Diego Incorporated, we understand that a Traffic Index (TI) of 5.0 has been assigned
to the subject roadways.
Subgrade soil consists predominately of silty to clayey sand with gravel, and typically exhibits
moderate to high R-Value characteristics. We performed the laboratory R-Value tests in accordance
with ASTM D 2844 (California Test Method No. 301). The results of the laboratory tests and the
corresponding roadway station numbers are presented in Table I.
Based on laboratory testing and the TI provided, we calculated the pavement sections in accordance
with California Department of Transportation Highway Design Manual and the City of Carlsbad
Minimum Structural Standard GS-17. The pavement sections and the Traffic Index are presented in
Table II. Calculations for the pavement sections are presented in Figure 1. Final pavement Section
approval should be obtained from the City of Carlsbad.
Asphalt concrete should conform to Section 203-6 of the Standard Specifications for Public Works
Construction (Greenbook). Class' 2 aggregate base materials should conform to Section 26-1.02A of
the Standard Specifications of the State of California, Department of Transportation (Caltrans) or
approved equivalent. Additionally, materials should conform to City of Carlsbad specifications.
c Prior to placing base materials for roadways and curb/gutter, the upper 12 inches of subgrade shoukl-'
be scarified, moisture conditioned as necessary, and compacted to a dry density of at least 95 percent
of the laboratory maximum dry density in accordance with ASTM D 1557. The upper 12 inches of
6960 Flanders Drive 0 San Diego, California 92121-2974 • Telephone 858.558.6900 U Fax 858.558.6159
,iotAL *
*ii \' 21 SADR
.I No. 1778
CERTIFIED -'
W ENGINEERING
GEOLOGIST -$7
PSCAt/
subgrade beneath areas to receive concrete sidewalks should be compacted to a dry density of at least
90 percent of the laboratory maximum dry density near to slightly above optimum moisture content.
The base materials should be compacted to a dry density of at least 95 percent of the laboratory
maximum dry density near to slightly above optimum moisture content. The asphalt concrete should
be compacted to a density of at least 95 percent of the laboratory Hveem density in accordance with
ASTM D 2726.
The performance of asphalt concrete pavement is highly dependent on providing positive surface
drainage away from the edge of the pavement. Ponding of water on or adjacent to the pavement will
likely result in saturation of the subgrade materials and subsequent pavement distress. To reduce the
occurrence for such situations, a minimum drainage gradient of at least 1 percent should be
maintained for pavement surfaces. Drainage from landscaped areas should be directed to controlled
drainage structures.
Should you have any questions regarding this correspondence, or if we may be of further service,
please contact the undersigned at your convenience.
Very truly yours,
GEOCON INCORPORATED
Michael C. Ertwine
Senior Staff Geologist
I .
Shawn Foy Weedon
GE 2714
MCE:AS:SFW:dmc
(2) Addressee
(3/del) CoiRich Job Site Trailer
Attention: Mr. Kirk Philo
(e-mail) Hunsaker & Associates
Attention: Mr. David Blalock
Project No. 06105-52-24B -2-. July 19, 2010
FIGURE 1
PAVEMENT SECTION CALCULATIONS
FOR LA COSTA OAKS NORTH - NEIGHBORHOOD 3.3 NORTH
Colina Cero - Stations 10+00 through 13+00
Use subgrade R-Value = 23.0
Traffic Index (TI) = 5.0
Methodology = Caltrans Highway Design Manual Section 608.4
Safety Factor = 0.2 - Applied to Asphalt Concrete (AC)
GE for AC = (0.0032)(5.0)(100-78.0)+0.2 =.55 feet
from Table 608.4B Highway Design Manual
GE = .55 feet for AC yields actual thickness = 2.65 inches
Use 4.0 inches of AC - City Minimum
GE for 4.0 inches of AC = .83 feet
GE for base = (0.0032)( 5.0)(100-23.0) -.83 = .40 feet -
from Table 608.4B Highway Design Manual with GF for Class 2 base = 1.1
Base thickness = 4.35 inches
Use base thickness = 5.0 inches
*** Design Street Structural Section ***
Asphalt Concrete Thickness = 4.0 inches.
Class 2 Aggregate Base Thickness = 5.0 inches.
Colina Cerro - Stations 13+00 through 16+00
Use subgrade R-Value = 27.0
Traffic Index (TI) = 5.0
Methodology = Caltrans Highway Design Manual Section 608.4
Safety Factor = 0.2 - Applied to Asphalt Concrete (AC)
GE for AC = (0.0032)(5.0)(100-78.0)+0.2 = .55 feet
from Table 608.4B Highway Design Manual
GE = .55 feet for AC yields actual thickness = 2.65 inches
Use 4.0 inches of AC - City Minimum
GE for 4.0 inches of AC = .83 feet
GE for base = (0.0032)( 5.0)(100-27.0)'- .83 = .33 feet
from Table 608.4B Highway Design Manual with GF for Class 2 base = 1
Base thickness = 3.65 inches
Use base thickness = 4.0 inches, City of Carlsbad minimum
*** Design Street Structural Section ***
Asphalt Concrete Thickness = 4.0 inches.
Class 2 Aggregate Base Thickness = 4.0 inches.
Project No. 06105-52-24B July 19, 2010
FIGURE 1 (Continued)
PAVEMENT SECTION CALCULATIONS
FOR LA COSTA OAKS NORTH - NEIGHBORHOOD 3.7
Sitio Caliente - Stations 16+50 through 19+50
Use subgrade R-Value = 58.0
Traffic Index (TI) = 5.0
Methodology = Caltrans Highway Design Manual Section 608.4
Safety Factor = 0.2 - Applied to Asphalt Concrete (AC)
GE for AC = (0.0032)(5.0)(100-78.0)+0.2 = .55 feet
from Table 608.4B Highway Design Manual
GE = .55 feet for AC yields actual thickness = 2.65 inches
Use 4.0 inches of AC - City Minimum
GE for 4.0 inches of AC = .83 feet
GE for base = (0.0032)(5.0)(100-58.0) -.83 = -.16 feet
from Table 608.4B Highway Design Manual with GF for Class 2 base = 1.1
Base thickness = -1.76 inches
Use base thickness = 4.0 inches, City of Carlsbad minimum
*** Design Street Structural Section ***
Asphalt Concrete Thickness = 4.0 inches.
Class 2 Aggregate Base Thickness = 4.0 inches.
Sitio Caliente - Stations 19+50 through 22+50
Use subgrade R-Value = 34.0
Traffic Index (TI) = 5.0
Methodology = Caltrans Highway Design Manual Section 608.4
Safety Factor = 0.2 - Applied to Asphalt Concrete (AC)
GE for AC = (0.0032)(5.0)(100-78.0)+0.2 =.55 feet
from Table 608.413 Highway Design Manual
GE = .55 feet for AC yields actual thickness = 2.65 inches
Use 4.0 inches of AC - City Minimum
GE for 4.0 inches of AC = .83 feet
GE for base = (0.0032)(5.0)(100-34.0) -.83 = .22 feet
from Table 608.4B Highway Design Manual with GF for Class 2 base = 1
Base thickness = 2.43 inches
Use base thickness = 4.0 inches, City of Carlsbad minimum
*** Design Street Structural Section ***
Asphalt Concrete Thickness = 4.0 inches.
Class 2 Aggregate Base Thickness = 4.0 inches.
Project No. 06105-52-24B July 19, 2010
FIGURE 1 (Continued)
PAVEMENT SECTION CALCULATIONS
FOR LA COSTA OAKS NORTH - NEIGHBORHOOD 3.7
Sitio Caliente - Stations 22+50 through 25+50
Use subgrade R-Value = 44.0
Traffic Index (TI) = 5.0
Methodology = Caltrans Highway Design Manual Section 608.4
Safety Factor = 0.2 - Applied to Asphalt Concrete (AC)
GE for AC = (0.0032)(5.0)(100-78.0)+0.2 =.55 feet
from Table 608.4B Highway Design Manual
GE = .55 feet for AC yields actual thickness = 2.65 inches
Use 4.0 inches of AC - City Minimum
GE for 4.0 inches of AC = .83 feet
GE for base = (0.0032)(5.0)(100-44.0) -.83 = .06 feet
from Table 608 .4B Highway Design Manual with GF for Class 2 base = 1.1
Base thickness = .68 inches
Use base thickness = 4.0 inches, City of Carlsbad minimum
*** Design Street Structural Section ***
Asphalt Concrete Thickness = 4.0 inches.
Class 2 Aggregate Base Thickness = 4.0 inches.
Sitio Caliente - Stations 25+50 through 28+00
Use subgrade R-Value = 51.0
Traffic Index (TI) = 5.0
Methodology = Caltrans Highway Design Manual Section 608.4
Safety Factor = 0.2 - Applied to Asphalt Concrete (AC)
GE for AC = (0.0032)(5.0)(100-78.0)+0.2 =.55 feet
from Table 608.4B Highway Design Manual
GE = .55 feet for AC yields actual thickness = 2.65 inches
Use 4.0 inches of AC - City Minimum
GE for 4.0 inches of AC =.83 feet
GE for base = (0.0032)(5.0)(100-51.0) -.83 = -.05 feet
from Table 608.4B Highway Design Manual with GF for Class 2 base = 1.1
Base thickness = -.54 inches
Use base thickness = 4.0 inches, City of Carlsbad minimum
Design Street Structural Section ***
Asphalt Concrete Thickness = 4.0 inches.
Class 2 Aggregate Base Thickness = 4.0 inches.
Project No. 06105-52-24B July 19, 2010
FIGURE 1 (Continued)
PAVEMENT SECTION CALCULATIONS
FOR LA COSTA OAKS NORTH - NEIGHBORHOOD 3.7
Corte Fortuna - Stations 17+00 through 19+00
Use subgrade R-Value = 60.0
Traffic Index (TI) = 5.0
Methodology = Caltrans Highway Design Manual Section 608.4
Safety Factor = 0.2 - Applied to Asphalt Concrete (AC)
GE for AC = (0.0032)(5.0)(100-78.0)+0.2 =.55 feet
from Table 608.4B Highway Design Manual
GE = .55 feet for AC yields actual thickness = 2.65 inches
Use 4.0 inches of AC - City Minimum
GE for 4.0 inches of AC =.83 feet
GE for base = (0.0032)(5.0)(100-60.0) -.83 = -.19 feet
from Table 608.4B Highway Design Manual with GP for Class 2 base = 1
Base thickness = -2.11 inches
Use base thickness = 4.0 inches, City of Carlsbad minimum
Design Street Structural Section ***
Asphalt Concrete Thickness = 4.0 inches.
Class 2 Aggregate Base Thickness = 4.0 inches.
Corte Fortuna - Stations 19+00 through 21+00
Use subgrade R-Value = 30.0
Traffic Index (TI) = 5.0
Methodology = Caltrans Highway Design Manual Section 608.4
Safety Factor = 0.2 - Applied to Asphalt Concrete (AC)
GE for AC = (0.0032)(5.0)(100-78.0)+0.2 = .55 feet
from Table 608.4B Highway Design Manual
GE = .55 feet for AC yields actual thickness = 2.65 inches
Use 4.0 inches of AC - City Minimum
GE for 4.0 inches of AC = .83 feet
GE for base = (0.0032)(5.0)(100-30.0) -.83 = .29 feet
from Table 608.4B Highway Design Manual with GF for Class 2 base = 1.1
Base thickness = 3.13 inches
Use base thickness = 4.0 inches, City of Carlsbad minimum
*** Design Street Structural Section
Asphalt Concrete Thickness = 4.0 inches.
Class 2 Aggregate Base Thickness = 4.0 inches.
Project No. 06105-52-24B July 19; 2010
TABLE I
SUMMARY OF R-VALUE TEST RESULTS
ASTM D 2844-01 (CALIFORNIA TEST METHOD NO. 301)
Sample Number Location R-Value
R-1 Colina Cerro - Stations 10+00 through 13+00 23
R-2 Colina Cerro - Stations 13+00 through 16+50 27
R-3 Sitio Caliente - Stations 16+50 through 19+50 58
R-4 Sitio Caliente - Stations 19+50 through 22+50 34
R-5 Sitio Caliente - Stations 22+50 through 25+50 44
R-6 Sitio Caliente - Stations 25+50 through 28+00 51
R-7 Corte Fortuna - Stations 17+00 through 19+00 30
R-8 Corte Fortuna - Stations 19+00 through 21+00 60
TABLE II
PAVEMENT SECTION RECOMMENDATIONS
Location Traffic
Index (TI) R-Value
Asphalt
Concrete
(inches)
Class 2*
Aggregate
Base (inches)
Colina Cerro - Stations 10+00 through 13+00 5.0 23 4.0 5.0
Colina Cerro - Stations 13+00 through 16+50 5.0 27 4.0 4.0
Sitio Caliente - Stations 16+50 through 19+50 5.0 58 4.0 4.0
Sitio Caliente - Stations 19+50 through 22+50 5.0 34 4.0 4.0
Sitio Caliente - Stations 22+50 through 25+50 5.0 44 4.0 4.0
Sitio Caliente - Stations 25+50 through 28+00 5.0 51 4.0 4.0
Corte Fortuna - Stations 17+00 through 19+00 5.0 30 4.0 4.0
Corte Fortuna - Stations 19+00 through 21+00 5.0 60 4.0 4.0
*Or approved equivalent.
Project No. 06105-52-24B July 19, 2010
41)
i2O'
GEOCON 0 INCORPOR ATED
GEOTECHNICAL CONSULTANTS
Project No. 06105-52-23A
September 24, 2008
LC Oaks 3.3, LLC
C/ CoiRich
4747 Morena Boulevard, Suite 100
San Diego, California 92117
Attention: Mr. Steve Butler
Subject: VILLAGES OF LA COSTA - THE OAKS NORTH - NEIGHBORHOOD 3.7
AVENIDA SOLEDAD - STATIONS 15+49 THROUGH 27+01
SITIO MONTILLA - STATIONS 10+00 THROUGH 14+30
CORTE VINO - STATIONS 20+00 THROUGH 21+ 10
SITIO CASTANO - STATIONS 10+00 THROUGH 14+51
CORTE SEGUNA - STATIONS 20+00 THROUGH 21+80
SITIO ARAGANO - STATIONS 30+69 THROUGH 31+33
CORTE CASERA - STATIONS 9+91 THROUGH 12+70
CARLSBAD, CALIFORNIA
PAVEMENT RECOMMENDATIONS
Dear Mr. Butler:
In accordance with your request, we obtained subgrade soil samples from the subject roadways. After'
collection, we performed Resistance Value (R-Value) tests on the samples. Based on conversations
with the project civil engineer from Hunsaker and Associates San Diego Incorporated, we understand
that a Traffic Index (TI) of 5.0 and 6.0 has been assigned to the subject roadways.
Subgrade soil consists predominately of silty to clayey sand with gravel, and typically exhibits
moderate to high R-Value characteristics. We performed the laboratory R-Value tests in accordance
with ASTM D 2844 (California Test Method No. 301). The results of the laboratory tests and the
corresponding roadway station numbers are presented in Table I.
Based on laboratory testing, we calculated the pavement sections in accordance with California
Department of Transportation Highway Design Manual and the City of Carlsbad Minimum Structural
Standard GS-17. The pavement sections and the Traffic Index are presented in Table II. Calculations
for the pavement sections are presented in Figure 1. Final pavement section approval should be
obtained from the City of Carlsbad.
Asphalt concrete should conform to Section 203-6 of the Standard Specifications for Public Works
Construction (Greenbook). Class 2 aggregate base materials should conform to Section 26-1.02A of
the Standard Specifications of the State of California, Department of Transportation (Caltrans) or
approved equivalent. Additionally, materials should conform to City of Carlsbad specifications. S
Prior to placing base materials for roadways and curb/gutter, the upper 12 inches of subgradbl&
scarified, moisture conditioned as necessary, and compacted to a dry density of at least 95 percent of
the laboratory maximum dry density in accordance with ASTM D 1557. The upper 12 inches of
6960 Flanders Drive • San Diego, California 92121-2974 0 Telephone (858) 558.6900 0 Fax (858) 558-6159
subgrade beneath areas to receive concrete sidewalks should be compacted to a dry density of at least
90 percent of the laboratory maximum dry density near to slightly above optimum moisture content.
The base materials should be compacted to a dry density of at least 95 percent of the laboratory
maximum dry density near to slightly above optimum moisture content. The asphalt concrete should be
compacted to a density of at least 95 percent of the laboratory Hveem density in accordance with
ASTM D 2726.
S
The performance of asphalt concrete pavement is highly dependent on providing positive surface
drainage away from the edge of the pavement. Ponding of water on or adjacent to the pavement will
likely result in saturation of the subgrade materials and subsequent pavement distress. To reduce the
occurrence for such situations, a minimum drainage gradient of at least 1 percent should be maintained
for pavement surfaces. Drainage from landscaped areas should be directed to controlled drainage
structures. -
Should you have any questions regarding this correspondence, or if we may be of further service,
please contact the undersigned at your convenience.
Very truly yours,
GEOCON INCORPORATED -
Michael C. Ertwine
4r
Shawn Weedon
Senior Staff Geologist OCEGG.1778 GE 2714
MCE:AS:SW:dmc
(2) Addressee tA WE
(3/del) ColRich Job Site Trailer AU OR No. 271 Z SADR Attention: Mr. Larry Willis 30/09 rn
(e-mail) Hunsaker & Associates * It ) *) Exp. 06/
Attention: Mr. David Blalock GEOWOIST
F.
Project No. 06105-52-23A - 2 - September 24, 2008
TABLE I
SUMMARY OF R-VALUE TEST RESULTS
ASTM D 2844-01 (CALIFORNIA TEST METHOD NO. 301)
Sample Number Location R-Value
R-1 Avenida Soledad - Stations 15+49 through 19+00 46
R-2 Avenida Soledad - Stations 19+00 through 22+50 29
R-3 Avenida Soledad - Stations 22+50 through 26+00 35
R-4 Avenida Soledad - Stations 26+00 through 27+01 33
R-4 Sitio Montilla - Stations 10+00 through 12+50 33
R-5 Sitio Montilla - Stations 12+50 through 14+30 35
R-5 Corte Vino - Stations 20+00 through 20+ 10 35
R-6 Sitio Castano - Stations 10+00 through 13+00 - 54
R-7 Sitio Castano - Stations 13+00 through 14+51 43
R-7 Corte Seguna - Stations 20+00 through 21+80 43
R-8 Sitio Aragano - Stations 30+69 through 31+33 35
R-8 Corte Casera - Stations 9+91 through 12+70 35
TABLE II
PAVEMENT SECTION RECOMMENDATIONS
Location Traffic
Index (TI) R-Value
Asphalt
Concrete
(inches)
Class 2*
Aggregate
Base (inches)
Avenida Soledad - Stations 15+49 through 19+00 6.0 46 4.0 6.0
Avenida Soledad - Stations 19+00 through 22+50 6.0 29 4.0 8.0
Avenida Soledad - Stations 22+50 through 26+00 6.0 35 4.0 7.0
Avenida Soledad - Stations 26+00 through 27+01 6.0 33 4.0 7.0
Sitio Montilla - Stations 10+00 through 12+50 5.0 33 4.0 4.0
Sitio Montilla - Stations 12+50 through 14+30 5.0 35 4.0 4.0
Corte Vino - Stations 20+00 through 20+ 10 5:0 35 4.0 4.0
Sitio Castano - Stations 10+00 through 13+00 5.0 54 4.0 4.0
SitioCastano - Stations 13+00 through 14+51 5.0 43 4.0 4.0
Corte Seguna -Stations 20+00 through 21+80, 5.0 43 4.0 4.0
Sitio Aragano - Stations 30+69 through 31+33 5.0 35 4.0 4.0
Corte Casera - Stations 9+91 through 12+70 5.0 ' 35 4.0 4.0
*Or approved equivalent.
Project No. 06105-52-23A Septeñiber 24, 2008
FIGURE 1
PAVEMENT SECTION CALCULATIONS
FOR LA COSTA OAKS NORTH - NEIGHBORHOOD 3.7
Avenida Soledad - Stations 15+49 through 19+00
Use subgrade R-Value = 46.0
Traffic Index (TI) = 6.0
Methodology = Caltrans Highway Design Manual Section 608.4
Safety Factor = 0.2 - Applied to Asphalt Concrete (AC)
GE for AC = (0.0032)(6.0)(100-78.0)+0.2 =.62 feet
from Table 608.4B Highway Design Manual
GE .62 feet for AC yields actual thickness 3.22 inches,
Use 4.0 inches of AC - City Minimum
GE for 4.0 inches of AC = .77 feet
GE for base = (0.0032)(6.0)(100-46.0) -.77 = .26 feet
from Table 608.413 Highway Design Manual with GF for Class 2 base = 1.1
Base thickness = 2.87 inches
Use base thickness = 6.0 inches, City of Carlsbad minimum
*** Design Street Structural Section ***
Asphalt Concrete Thickness = 4.0 inches.
Class 2 Aggregate Base Thickness = 6.0 inches.
Avenida Solédad - Stations 19+00 through 22+50
Use subgrade R-Value = 29.0
Traffic Index (TI) = 6.0
Methodology = Caltrans Highway Design Manual Section 608.4
Safety Factor = 0.2 - Applied to Asphalt Concrete (AC)
GE for AC = (0.0032)(6.0)(100-78.0)+0.2 =.62 feet
from Table 608.4B Highway Design Manual
GE = .62 feet for AC yields actual thickness = 3.22 inches
Use 4.0 inches of AC - City Minimum
GE for 4.0 inches of AC = .77 feet
GE for base = (0.0032)(6.0)(100-29.0) - .77 = .59 feet
from Table 608.4B Highway Design Manual with OF for Class 2 base = 1.1
Base thickness = 6.43 inches
Use base thickness = 8.0 inches, City of Carlsbad minimum
*** Design Street Structural Section
Asphalt Concrete Thickness = 4.0 inches. /
Class 2 Aggregate Base Thickness = 8.0 inches.
Project No. 06105-52-23A .
September 24, 2008
FIGURE 1 (Continued)
PAVEMENT SECTION CALCULATIONS
FOR LA COSTA-OAKS NORTH - NEIGHBORHOOD 3.7
Avenida Soledad - Stations 22+50 through 26+00
Use subgrade R-Value = 35.0
Traffic Index (TI) = 6.0
Methodology = Caltrans Highway Design Manual Section 608.4
Safety Factor = 0.2 - Applied to Asphalt Concrete (AC)
GE for AC = (0.0032)(6.0)(100-78.0)+0.2 =.62 feet
from Table 608.4B Highway Design Manual
GE = .62 feet for AC yields actual thickness = 3.22 inches
Use 4.0 inches of AC - City Minimum
GE for 4.0 inches of AC = .77 feet
GE for base = (0.0032)(6.0)(100-35.0) -.77 = .47 feet
from Table 608.4B Highway Design Manual with GF for Class 2 base = 1.1
Base thickness = 5.18 inches
Use base thickness = 7.0 inches, City of Carlsbad minimum -
** Design Street Structural Section ***
Asphalt Concrete Thickness = 4.0 inches.
Class 2 Aggregate Base Thickness = 7.0 inches.
Avenida Soledad - Stations 26+00 through 27+01
Use subgrade R-Value = 33.0
Traffic Index (TI) = 6.0
Methodology = Caltrans Highway Design Manual Section 608.4
Safety Factor = 0.2 - Applied to Asphalt Concrete (AC)
GE for AC = (0.0032)(6.0)(100-78.0)+0.2 = .62 feet
from Table 608.4B Highway Design Manual
GE = .62 feet for AC yields actual thickness = 3.22 inches
Use 4.0 inches of AC - City Minimum
GE for 4.0 inches of AC. = .77 feet
GE for base = (0.0032)(6.0)(100-33.0) - .77 = .51 feet
from Table 608.4B Highway Design Manual with GF for Class 2 base = 1.1
Base thickness = 5.60 inches
Use base thickness = 7.0 inches, City of Carlsbad minimum
-
*** Design Street Structural Section
Asphalt Concrete Thickness = 4.0 inches.
Class 2 Aggregate Base Thickness = 7.0 inches.
Project No. 06105-52-23A - September 24, 2008
FIGURE 1 (Continued)
PAVEMENT SECTION CALCULATIONS
FOR LA COSTA OAKS NORTH - NEIGHBORHOOD 3.7
Sitio Montilla - Stations 10+00 through 12+50
Use subgrade R-Value = 33.0
Traffic Index (TI) = 5.0
Methodology = Caltrans Highway Design Manual Section 608.4
Safety Factor = 0.2 - Applied to Asphalt Concrete (AC)
GE for AC = (0.0032)(5.0)(100-78.0)+0.2 =.55 feet
from Table 608.4B Highway Design Manual
GE = .55 feet for AC yields actual thickness = 2.65 inches
Use 4.0 inches of AC - City Minimum
GE for 4.0 inches of AC = .83 feet
GE for base = (0.0032)(5.0)(100-33.0) -.83 = .24 feet
from Table 608.4B Highway Design Manual with GF for Class 2 base = 1.1
Base thickness = 2.60 inches
Use base thickness = 4.0 inches, City of Carlsbad minimum
*** Design Street Structural Section ***
Asphalt Concrete Thickness = 4.0 inches.
Class 2 Aggregate Base Thickness = 4.0 inches.
Sitio Montilla - Stations 12+50 through 14+30
Use subgrade R-Value = 35.0
Traffic Index (TI) = 5.0
Methodology = Caltrans Highway Design Manual Section 608.4
Safety Factor = 0.2 - Applied to Asphalt Concrete (AC)
GE for AC = (0.0032)( 5.0)(100-78.0)+0.2 =.55 feet
from Ta•ble 608.4B Highway Design Manual
GE = .55 feet for AC yields actual thickness = 2.65 inches
Use 4.0 inches of AC - City Minimum
GE for 4.0 inches of AC = .83 feet
GE for base = (0.0032)(5.0)(100-35.0) -.83 = .21 feet
from Table 608.4B Highway Design Manual with GF for Class 2 base = 1.1
Base thickness = 2.25 inches
Use base thickness = 4.0 inches, City of-Carlsbad minimum
*** Design Street Structural Section
Asphalt Concrete Thickness = 4.0 inches.
Class 2 Aggregate Base Thickness = 4.0 inches.
Project No. 06105-52-23A September 24, 2008
FIGURE *1 (Continued)
PAVEMENT SECTION CALCULATIONS
FOR LA COSTA OAKS NORTH - NEIGHBORHOOD 3.7
Corte Vino - Stations 20+00 through 20+10
Use subgrade R-Value = 35.0
Traffic Index (TI) = 5.0
Methodology = Caltrans Highway Design Manual Section 608.4
Safety Factor = 0.2 - Applied to Asphalt Concrete (AC)
GE for AC = (0.0032)(5.0)(100-78.0)+0.2 =.55 feet
from Table 608.4B Highway Design Manual
GE = .55 feet for AC yields actual thickness = 2.65 inches
Use 4.0 inches of AC - City Minimum
GE for 4.0 inches of AC = .83 feet
GE for base = (0.0032)( 5.0)(100-35.0) -.83 =.21 feet
from Table 608.4B Highway Design Manual with GF for Class 2 base = 1.1
Base thickness = 2.25 inches .
Use base thickness = 4.0 inches, City of Carlsbad minimum
*** Design Street Structural Section ***
Asphalt Concrete Thickness = 4.0 inches.
Class 2 Aggregate Base Thickness = 4.0 inches.
Sitio Castano - Stations 10+00 through 13+00
Use subgrade R-Value = 54.0
Traffic Index (TI) =5.0 -
Methodology = Caltrans Highway Design Manual Section 608.4
Safety Factor = 0.2 - Applied toAsphalt Concrete (AC)
GE for AC = (0.0032)(5.0)(100-78.0)+0.2 .55 feet
from Table 608.413 Highway Design Manual
GE = .55 feet for AC yields actual thicknes = 2.65 inches
Use 4.0 inches of AC - City Minimum
GE for 4.0 inches of AC =.83 feet
GE for base = (0.0032)(5.0)(100-54.0) -.83 = -.10 feet
from Table 608.4B Highway Design Manual with GF for Class 2 base = 1.1
Base thickness = -1.06 inches
Use base thickness = 4.0 inches, City of Carlsbad minimum
*** Design Street Structural Section
Asphalt Concrete Thickness = 4.0 inches.
Class 2 Aggregate Base Thickness = 4.0 inches.'
Project No. 06105-52-23A September 24, 2008
FIGURE 1 (Continued)
PAVEMENT SECTION CALCULATIONS
FOR LA COSTA OAKS NORTH - NEIGHBORHOOD 3.7
Sitio Castano - Stations 13+00 through 14+51
Use subgrade R-Value = 43.0
Traffic Index (TI) = 5.0
Methodology = Caltrans Highway Design Manual Section 608.4
Safety Factor = 0.2 - Applied to Asphalt Concrete (AC) -
GE for AC = (0.0032)(5.0)(100-78.0)+0.2 =.55 feet
from Table 608.4B Highway Design Manual
GE = .55 feet for AC yields acfual thickness = 2.65 inches
Use 4.0 inches of AC - City Minimum,
GE for 4.0 inches of AC = .83 feet
GE for base = (0.0032)(5.0)(100-43.0)'-.83 .08 feet
from Table 608.4B Highway Design Manual with GF for Class 2 base = 1.1
Base thickness = .86 inches
Use base thickness = 4.0 inches, City of Carlsbad minimum
*** Design Street Structural Section
Asphalt Concrete Thickness = 4.0 inches.
Class 2 Aggregate Base Thickness = 4.0 inches.
Corte Seguna Stations 20+00 through 21+80
Ue subgrade R-Value = 43.0
Traffic Index (TI) = 5.0
Methodology = Caltrans Highway Design Manual Section 608.4
Safety Factor = 0.2 - Applied to Asphalt Concrete (AC)
GE for AC = (0.0032)(5.0)(100-78.0)+0.2 = .55 feet S
from Table 608.4B Highway Design Manual
GE = .55 feet for AC yields actual thickness = 2.65 inches
Use 4.0 inches of AC - City Minimum
GE for 4.0 inches of AC = .83 feet
GE for base = (0.0032)(5.0)(100-43.0) -.83 = .08 feet
from Table 608.4B Highway Design Manual with GF for Class 2 base = 1.1
Base thickness = .86 inches
Use base thickness = 4.0 inches, City of Carlsbad minimum
*** Design Street Structural Section
Asphalt Concrete Thickness = 4.0 inches.
Class 2 Aggregate Base Thickness = 4.0 inches.
Project-No. 06105-52-23A .
. September 24, 2008
FIGURE 1 (Continued)
PAVEMENT SECTION CALCULATIONS
FOR LA COSTA OAKS NORTH - NEIGHBORHOOD 3.7
Sitio Aragano - Stations 30+69 through 31+33
Use subgrade R-Value =35.0
Traffic Index (TI) = 5.0
Methodology =Caltrans Highway Design Manual Section 608.4
Safety Factor = 0.2 - Applied to Asphalt Concrete (AC)
GE for AC = (0.0032)(5.0)(100-78.0)+0.2 .55 feet
from Table 608.4B Highway Design Manual
GE = .55 feet for AC yields actual thickness = 2.65 inches
Use 4.0 inches of AC - City Minimum
GE for 4.0 inches of AC = .83 feet
GE for base = (0.0032)( 5.0)(100-35.0) -.83 =.21 feet
from Table 608.4B Highway Design Manual with GF for Class 2 base = 1.1
Base thickness = 2.25 inches
Use base thickness = 4.0 inches, City of Carlsbad minimum
*** Design Street Structural Section ***
Asphalt Concrete Thickness = 4.0 inches.
Class 2 Aggregate Base Thickness =4.0 inches
Corte Casera - Stations 9+91 through 12+70
Use subgrade R-Value = 35.0 -'
Traffic Index (TI) = 5.0
Methodology = Caltrans Highway Design Manual Section 608.4
Safety Factor = 0.2 - Applied to Asphalt Concrete (AC)
GE for AC = (0.0032)(5.0)(100-78.0)-f0.2 =.55 feet
from Table 608.4B Highway Design Manual
GE = .55 feet for AC yieds actual thickness = 2.65 inches
Use 4.0 inches of AC - City Minimum
GEfor 4.0 inches of AC = .83 feet
GE for base = (0.0032)(5.0)(100-35.0) -.83 = .21 feet
from Table 608.413 Highway Design Manual with GF for Class 2 base = 1.1
Base thickness 2.25 inches
Use base thickness = 4.0 inches, City of Carlsbad minimum
*** Design Street Structural Section ***
Asphalt Concrete Thickness = 4.0 inches.
Class 2 Aggregate Base Thickness= 4.0 inches.
Project No. 06105-52-23A September 24, 2008