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Home My WebLink AboutCT 03-02; CARLSBAD RANCH PA 5; PAVEMENT ANALYSIS/RECOMMENDATION; 2007-05-10C1O1,.O Ilk Geo technical Engineering Construction Inspection Materials Testing Environmental Office Locations Orange County Corporate Branch: 2992E. La Palma Avenue Suite A Anaheim, CA 92806 Tel: 714.632.2999 Fax: 714.632.2974 10, 2007 Ir. Bruce Zelenka rand Pacific Carlsbad, L.P. 900 Parteur Court, Suite 200 ar1sbad, CA 92008 Pavement Anaysis/Recommendation Grand Pacific Resort Carlsbad, CA Project No. 1916-AOl Log No. 07-797 San Diego Imperial County 7313 Carroll Road Suite G San Diego, CA 92121 Tel: 858.537.3999 Fax: 859.537.3990 www.mtglinc.com Dear Mr. Zelenka At the request of the Project Superintendent and in conjunction with the City of Carlsbad requirements, additional soil samples were obtained on Grand Pacific Drive for pavement analysis. This report presents the results of analysis and recommendation. Soil Sampling Representative soil samples were obtained within the current finish subgrade to receive pavement. A total of three samples were obtained on Grand Pacific Drive. Laboratory Testing The soil samples were brought to our laboratory and Resistance R-value testing was performed in general accordance with Caltrans Test Method 301. The R-value results are summarized below. . Location R-Value Grand Pacific Dr. Sta. 23+00 14 Grand Pacific Dr. Sta. 26+00 21 Grand Pacific Dr. Sta. 29+00 70 The R-value results at Stations 23+00 and 26+00 are similar with those previously tested at between Stations 4+50 and 16+00, due to similar soil types. As such, the pavement structural section is the same as presented in our report dated April 11, 2007, which are reiterated herein. However, the R-value result at Sta. 29+00 is significantly high (R-value = 70) due to differing soil type consisting of near white/light gray sand. This soil type appear to start at approximately Station 27+00 and extending to Hidden Valley Road. Inland Empire 14467 Meridian Parkway Building 2A Riverside, CA 92518 Tel: 951.653.4999 Fax: 951.653.4666 OC/LA/Inland Empire Dispatch 800.491.2990 San Diego Dispatch 888.844.5060 Grand Pacific Resort Project No. 1916-AO1 Page 2 Log No. 07-797 Pavement Structural Section Our engineering analysis for the pavement structural section presented in this report was derived based upon the standard design procedures for pavement as outlined in Caltrans Highway Design Manual. Our analyses included the Traffic Indices provided in the Leighton and Associates, Inc. geotechnical report dated April 11, 2005. These Traffic Indices are 4.5 for auto parking areas, 5.0 for auto driveways, 6.0 for light duty truck driveways and 7.0 for moderate duty truck driveways. Following the minimum structural section as required per the GS-17 of the City of Carlsbad, the recommended asphalt concrete pavement sections are summarized below. Stations 23+00 to 26+00 (Average R-value = 17 Loading Condition Traffic Index Asphalt Concrete Aggregate Base Auto Parking Areas 4.5 4.0 inches 4.0 inches Auto Driveways 5.0 4.0 inches 6.0 inches Light Duty Truck Driveways 6.0 4.0 inches 11.0 inches Moderate Duty Truck Driveways 7.0 4.0 inches 13.0 inches Moderate Duty Truck Driveways 7.0 5.0 inches 11.0 inches Station 29+00 (Soil Type - Near White/Light Gray Sand, R-value = 70 Loading Condition Traffic Index Asphalt Concrete Aggregate Base Auto Parking Areas 4.5 4.0 inches 4.0 inches Auto Driveways 5.0 4.0 inches 4.0 inches Light Duty Truck Driveways 6.0 4.0 inches 6.0 inches Moderate Duty Truck Driveways 1 7.0 1 4.0 inches 6.0 inches Above recommended pavement sections may be subject for approval by the office of the City of Carlsbad prior to implementation. Construction Considerations The upper 12 inches of subgrade should be compacted to a minimum of 95 percent relative compaction based on ASTM D1557. Grand Pacific Resort Project No. 1916-AO1 Page 3 Log No. 07-797 Base material should conform to the requirements of Section 200-2 of the Standard Specifications for Public Works Construction (SSPWC). Base material shall be spread and compacted in one or two layers of approximately equal thickness and the maximum compacted thickness of any one layer shall not exceed 6 inches. Appropriate moisture is required during compacting. The relative compaction of each layer of compacted base material shall not be less than 95 percent per Test Method ASTM D1557. Asphalt concrete shall be dense, hot-laid, hot mix asphalt plant mixes with a history of satisfactory performance in geographical area where project is located and approved by authorities having jurisdiction. Hot-mix asphalt paving materials, workmanship and other requirements shall be in accordance with the state standard specifications or SSPWC. Geotechnical ObservationlTesting The geotechnical consultant should perform geotechnical observation and testing to ascertain that conditions corresponds to the findings and conclusions and that construction conform generally to the recommendations presented herein. T imitRtions The analyses, conclusions and recommendations contained in this report were based using the standard of care and skill ordinarily exercised under similar circumstances by reputable engineers and geologists currently practicing in this or similar localities. No other warranty or representation, either expressed or implied, is included or intended. If you have any questions regarding our report, please do not hesitate to contact this office. We appreciate this opportunity to be of service. Respectfully submitted, MTGL, Inc. Eduardo C. Dizon, RCE Project Engineer RCE 57217, Exp. 12/31/07 Attachments: R-value Lab Data cc: City of Carlsbad Mr. Bob Sciotto I Hazard Construction R-VALUE TEST REPORT 100 . 80 - ......... . 60 - .......... 40 - .... .. 20 - 0 I I I I i I i i i i i I i i i I i I I I 11111 I I I I I I I I I i i i i I I LLJ 800 700 600 500 400 300 200 100 Exudation Pressure - psi Resistance R-Value and Expansion Pressure - Cal Test 301 - Compact. Expansion Horizontal Sample Exud. R Density M OIS• R No. Pressure Pressure Press. psi Height Pressure Value pcf % . Value - psi psi c 160 psi i n. PSI Corr. 1 110 121.1 13.2 0.00 133 2.54 204 12 12 2 150 122.7 12.4 0.00 126 2.53 366 15 15 3 200 125.0 11.5 0.00 120 2.52 517 19 19 Test Results Material Description R-value at 300 psi exudation pressure = 14 SILTY SAND (SM), brown Project No.: 1916-AOl Tested by: JH Project:Grand Pacific Resort Checked by: ED Location: Station 23+00, Centerline Remarks: Sample Number: 0270 Lab #0270 Date: 5/7/2007 R-VALUE TEST REPORT MTGL, Inc. Figure R-VALUE TEST REPORT 1 0 . . 80 - ... . 60 - .... . .40 - ...... . . 20- 0 I I I t I i i I i I I I i I i I LLJ 800 700 600 500 400 300 200 100 Exudation Pressure - psi Resistance R-Value and Expansion Pressure - Cal Test 301 Compact. Expansion Horizontal Sample Exud. R No. Pressure Density Moist. Pressure Press. psi Height Pressure R Value psi pcf % psi @ 160 psi in. . psi Value Corr. 150 119.3 14.1 0.00 128 2.52 168 15 15 2 250 120.5 13.7 0.00 120 2.53 277 20 20 3 300 1 123.6 12.8 0.00 1 10:8:=2.52 434 27 27 Test Results Material Description R-value at 300 psi exudation pressure = 21 SILTY SAND (SM), brown Project No.: 1916-Aol Tested by: JR Project:Grand Pacific Resort Checked by: ED Location: Station 26+00 Centerline . Remarks: Lab #0271 Sample Number: 0271 Date: 5/7/2007 R-VALUE TEST REPORT MTGL, Inc. Figure R-VALUE TEST REPORT 100 . . . . . . . . . 80 60 - ......... . (5 - ...................... . 40 - ........ 20 - .......... 0 I I I I I I I I I I I I 800 700 600 500 400 300 200 . 100 Exudation Pressure - psi Resistance R-Value and Expansion Pressure - Cal Test 301 Compact. Expansion Horizontal Sample Exud. R - R No. Pressure Density Moist. Pressure Press. psi Height Pressure Value psi pcf % psi 160 psi . in. . psi Value Corn 300 98.9 18.3 0.00 46 2.54 180 65 65 2 350 97.8 16.2 0.00 30 2.46 477 77 77 3 320 95.4 17.9 0.00 35 2.41 337 73 71 Test Results Material Description R-value at 300 psi exudation pressure = 70 SAND (SP), gray Project No.: 1916-Aol Tested by: JH. Project:Grand Pacific Resort Checked by: ED Location: Station 29+00 Centerline Remarks: Lab 40272 Sample Number: 0272 Date: 5/7/2007 R-VALUE TEST REPORT MTGL, Inc. . Figure