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HomeMy WebLinkAboutCT 08-03; LA COSTA TOWN SQUARE RESIDENTIAL; PAVEMENT SECTION RECOMMENDATIONS; 2013-10-10c San Diego I 6280 Riverdale Street & SOUTHERN CALIFORNIA 619.280.4321 j San Diego, CA 92120 SOIL &TESTING, INC. Indio 83-740 Citrus Avenue A California Certified Small Business Enterprise (SBE) 760775.5983 Suite G Indio, CA 92201-3438 Riverside 1130 Palmyrita Avenue 951.965.8711 i Suite 330-A Riverside, CA 92507 Toll Free 877.215.4321 www.scst.com October 10, 2013 Mr. Marty McComas Davidson Communities 1302 Camino Del Mar Del Mar, California 92014 SCS&T No. 1311060 Report No. 07 Subject: UPDATED PAVEMENT SECTION RECOMMENDATIONS SITIO LIMA AND PASEO TAMARINDO LA COSTA TOWN SQUARE - RESIDENTIAL CARLSBAD, CALIFORNIA Dear Mr. McComas: This letter presents updated pavement section recommendations along Sitio Lima and the northern portion of Paseo Tamarindo at the subject residential development. Five samples of the pavement subgrade soils were collected on October 4, 2013 to estimate the R-value of the soils for pavement section design. The subgrade soils generally consist of clayey sand with varying amounts of gravel. R-value tests were performed in accordance with California Test 301. The test results indicate R-values ranging from 10 to 18. According to David Blalock of Hunsaker & Associates, Traffic Indices of 4.5 and 5.0 (corresponding to cul-de-sacs and local streets, respectively, per City of Carlsbad standards) should be used for design. Based on a design R-value of 10 and the minimum structural section of the City of Carlsbad, the following pavement sections are recommended. Street Traffic Index Asphalt Concrete (inches) Class 2 Aggregate Base (inches) Sitio Lima 4.5 4 5 Paseo Tamarindo 5.0 4 7 If you have questions concerning this report, please call me at (619) 280-4321. Respectfully Su SOUTHERN C L & TESTING, INC. Garrett F Principal G BF:aw rn Addressee via e-mail at MMCComas@davidsoncommunities.com George Sturgeon, Davidson Communities (GStu rgeon@davidsoncommunities.com) (1) Rob Slempa, Public Works Inspector - City of Carlsbad SOUTHERN CALIFORNIA (SJ SOIL &TESTING,INC. A California Certified Small Business Enterprise (SEE) San Diego 6280 Riverdale Street 619.280.4321 San Diego, CA 92120 Indio 83-740 Citrus Avenue 760.775.5983 Suite G Indio, CA 92201-3438 Riverside 1130 Palmyrita Avenue 951.965.8711 Suite 330.A Riverside, CA 92507 Toll Free 877.215.4321 www.scst.com July 1, 2013 SCS&T No. 1311060 Report No. 5 Mr. Marty McComas Davidson Communities 1302 Camino Del Mar Del Mar, California 92014 Subject: PORTLAND CEMENT CONCRETE PAVEMENT RECOMMENDATIONS CALLE PERA STATION 12+00 TO 13+19.64 LA COSTA TOWN SQUARE - RESIDENTIAL f\1L4 1 I CARLSBAD, CALIFORNIA U Dear Mr. McComas: This letter presents Portland cement concrete (PCC) pavement recommendations for Calle Pera between stations 12+00 and 13+19.64 at the subject residential development. Samples of the pavement subgrade soils were collected on June 11, 2013 to estimate the R-value of the soils for pavement section design. The subgrade soils generally consist of sandy clay to clayey sand with varying amounts of gravel. R-value tests were performed in accordance with California Test 301. The test results indicate R-values ranging from 5 to 16. An R-value of 5 was assumed for design. The PCC is assumed to have a minimum jy flexumLstrnpth of 600_psL According to David Blalock of Hunsaker & Associates, a Traffic Index of 5.0 (corresponding to local streets per City of Carlsbad standards) should be used for design. Based on these assumptions, the recommended pavement section is 61/2 inches of PCC over 6 inches of aggregate base over compacted subgrade. The upper 12 inches of subgrade should be scarified, moisture conditioned to above optimum moisture requirements, and compacted to at least 95% of the maximum dry density. All soft or spongy areas should be excavated and replaced with compacted fill. Aggregate base should be compacted to at least 95% of its maximum dry density. All materials and methods of construction should conform to good engineering practices and the minimum standards of the City of Carlsbad. If you have questions concerni ii, plea call me at (619) 280-4321. Respectfully Submitted, SOUTHERN CALIFORN Thomas B. Canady, PE Senior Engineer TBC:aw PLIO57 Addressee via e-mail at MMCComas@davidsoncommunities.com George Sturgeon, Davidson Communities (GSturgeon © davidsoncommunities.com) (1) Rob Slempa, Public Works Inspector - City of Carlsbad RECEIVED CITY OF CARLSBAD I I j) 3- 2013 & San Diego 619.280.4321 SOUTHERN CALIFORNIA LdlO SOIL & TESTING, INC . TRANSPORTATiON DEPARTMENT A California Certified Small Business Enterprise(SBE) CM&I DIVISION 360.775.5983 Riverside 951.965.8711 Toll Free 877.215.4321 6280 Riverdale Street San Diego, CA 92120 83-740 Citrus Avenue Suite G Indio, CA 92201.3438 1130 Palmyrita Avenue Suite 330-A Riverside, CA 92507 www.scst.com SCS&T No. 1311060 Report No. 04 Mr. Marty McComas L 01 2W Davidson Communities Received 1302 Camino Del Mar Accounting Department Del Mar, California 92014 Subject: UPDATED PAVEMENT SECTION RECOMMENDATIONS SITlO SANDIA AND CALLE PERA LA COSTA TOWN SQUARE - RESIDENTIAL CARLSBAD, CALIFORNIA Dear Mr. McComas: June 28, 2013 Davidson Communities This letter presents updated pavement section recommendations for Sitio Sandia and Calle Pera at the subject residential development. Five samples of the pavement subgrade soils were collected on June 11, 2013 to estimate the R-value of the soils for pavement section design. The subgrade soils generally consist of sandy clay to clayey sand with varying amounts of gravel. R-value tests were performed in accordance with California Test 301. The test results indicate R-values ranging from 5 to 16. According to David Blalock of Hunsaker & Associates, Traffic Indices of 4.5 and 5.0 (corresponding to cul-de-sacs and local streets, respectively, per City of Carlsbad standards) should be used for design. Based on a design R-value of 5 and the minimum structural section of the City of Carlsbad, the following pavement sections are recommended. Street Traffic Index Asphalt Concrete (inches) Class 2 Aggregate Base I (inches) Sitio Sandia 4.5 I 4 6 Calle Pera 5.0 4 I 8 If you have questions concerning Respectfully Submitted, SOUTHERN CALIFORNIA &i Pb1 19111 Thomas B. Canady, PE 5005 Senior Engineer call me at (619) 280-4321. TBC:aw Addressee via e-mail at MMCComas@davidsoncommunities.com George Sturgeon, Davidson Communities (GSturgeon@davidsoncommunities.com) (1) Rob Slempa, Public Works Inspector — City of Carlsbad I Diego &San SOUTHERN CALIFORNIA 619.280.4321 SOIL &TESTING,INC. Indio A California Certified Small Business Enterprise (SEE) 760.775.5983 - RECEIVED Riverside I CITY OF CARLSBAD 951.965.8711 I Toll Free Jt L 2- 2013 77.215.4321 1 6280 Riverdale Street San Diego, CA 92120 83-740 Citrus Avenue Suite G Indio, CA 92201-3438 1130 Palmyrita Avenue Suite 330-A Riverside, CA 92507 www.scst.com July 1, 2013 TRANSPORTATION DEPARTMENT SCS&T No. 1311060 CM&I DIVISION - J Report No. 5 Mr. Marty McComas Davidson Communities 1302 Camino Del Mar Del Mar, California 92014 Subject: PORTLAND CEMENT CONCRETE PAVEMENT RECOMMENDATIONS CALLE PERA STATION 12+00 TO 13+19.64 LA COSTA TOWN SQUARE - RESIDENTIAL CARLSBAD, CALIFORNIA - Dear Mr. McComas: This letter presents Portland cement concrete (PCC) pavement recommendations for Calle Pera between stations 12+00 and 13+19.64 at the subject residential development. Samples of the pavement subgrade soils were collected on June 11, 2013 to estimate the R-value of the soils for pavement section design. The subgrade soils generally consist of sandy clay to clayey sand with varying amounts of gravel. R-value tests were performed in accordance with California Test 301. The test results indicate R-values ranging from 5 to 16. An R-value of 5 was assumed for design. The PCC is assumed to have a minimum 28-day flexural strength of 600 psi. According to David Blalock of Hunsaker & Associates, a Traffic Index of 5.0 (corresponding to local streets per City of Carlsbad standards) should be used for design. Based on these assumptions, the recommended pavement section is 61/2 inches of PCC over 6 inches of aggregate base over compacted subgrade. The upper 12 inches of subgrade should be scarified, moisture conditioned to above optimum moisture requirements, and compacted to at least 95% of the maximum dry density. All soft or spongy areas should be excavated and replaced with compacted fill. Aggregate base should be compacted to at least 95% of its maximum dry density. All materials and methods of construction should conform to good engineering practices and the minimum standards of the City of Carlsbad. If you have questions concerning this report, please call me at (619) 280-4321. Respectfully Submitted, SOUTHERN CALIFORNIA SOIL TSTI 'G91 131. ell Senior Engineer 4 IVI Addressee via e-mail at MMCComas@davidsoncommunities.com George Sturgeon, Davidson Communities (GSturgeon © davidsoncommunities.com) (1) Rob Slempa, Public Works Inspector - City of Carlsbad MINIMUM STRUCTURAL SECTION IN INCHES TI= 1.35 (EWL) TYPE CUL-DE- LOCAL COLLECTOR LIGHT SECONDARY1 MAJOR PRIME _sç STREET - INDUSTRIAL ARTERIALI ARTERIAL 1EL R-VALUE AB AC AB AC AB AC AB AC AB 47W_____ 10 4 5 4 18 5 18 6 18 L12 4 12 4 14 14 - - . . 4 17 5 17 6 1 17 16 t4 _4 4 11 4 13 5 16 6 16 18 45 416 20 41041241.5515615 22 . 6 14 26 5 1 13 6 13 28 4 8 4 10 4 13 30 5 12 6 12 - 34 4 11 5 11 36 4 6 4 8 6 10 38 4 10 5 10 6 9 40 47 59 42 4 9 6 8 44 .46 58 46 4 8 6 7 48 5 7 6 6 50 .. 4756 52 54 .. 46 SOILS HONG AN R VALUE LESS THAN 12 REQUIRE SPECIAL CONSIDERATION. AN ALTERNATIVE TO INCREASING THE STRUCTURAL SECTION IS TO TEST FOR LIME STABILIZATION. THE CORRESPONDING STRUCTURAL SECTION DETERMINED AND % LIME ESTABLISHED. A.B. = ALL AGGREGRATE BASE MATERIALS SHALL BE CLASS II PER CALTRANS SECTION 26-1.02A OR CMB PER SECTION 200-2.4 SSPWC. THE BOTTOM FIGURES LISTED ARE THE MINIMUM PERMITTED. TOP 12 OF SUB-GRADE TO BE 95% COMPACTION. PAVING SHALL BE DONE IN A MINIMUM OF TWO LIFTS WITH THE SURFACE COURSE DONE JUST PRIOR OCCUPANCY. THE BASE COURSE SHALL BE 2.5" MIN. POTABLE, RECLAIMED WATER AND GAS, VALVE BOXES SHALL BE RAISED TO GRADE OR MADE ACCESSIBLE AT EACH PAVING LIFT AS APPROVED BY THE CITY ENGINEER. IF THE SEWER MAIN IS IN SERVICE, THE ACCESSHOLE SHALL BE RAISED TO AT EACH PAVING LIFT. RAISING APPURTENANCES TO FS BEFORE AC CAP WILL NOT BE ALLOWED. RAISING VALVE BOXES, CLEANOUTS OR ACCESSORI E S T O FINISH GRADE BEFORE FINISH AC CAP IS PLACED WILL NOT BE ALLOWED. REV. APPROVED DATE CITY OF CARLSBAD . ' z:7 v..._.. 6-04 STRUCTURAL SECTION CITY ENGINEER DATE OF STREETS AND ALLEYS GS-17