Loading...
HomeMy WebLinkAboutCT 72-34; RANCHO LA CUESTA; FINAL GRADING REPORT; 1977-01-11( ' Final Engineering Geologic Grading Report; Tract 72-34, Lots 1, 44 and 135 (and adjacent streets) Offsite Fill Areas Southerly of_ Lots 269, 270, 310- 312, and Retension Basin Area~ in the City of Carlsbad, California For Newport ·· Rui Ide rs January 11, 1977 by Pacific Soils Engineering, Inc. Irvine, California ,, PACIFIC SOILS ENGINEERING, INC. 17921 SKY PARK CIRCLE (SUITE G) IRVINE, CALIF. 92714 TELEPHOME: (714) 557·9450 Newport Shores Bui Ide rs P ,0. Box A Huntington Beach, CA 92648 Attention: Subject: Gentlemen: Mr. Mike Jager Final Engineering Geologic Grading Report; Tract 72-34, Lots 1, 44 and 135 (and adjacent streets}; Offsite FU I Areas Southerly of Lots 269, 270, and 310-312, and Retension Basin Area, in the City of Carlsbad, California L.A. COUNTY OFFICE 1402 W. 240th Street Harbor City, Ca. 90710 (213) 325·7272 or 775-6771 VENTURA COUNTY OFFICE Post Office Box 75 Thousand Oaks, Ca. 91360 (213) 889-9919 (805) 495-6513 Jsmua ry 11 , 1977 Work Order l 00236A This final geologic report for the subject tract is submitted in accordance with the requirements of the City of Carlsbad. Geologic data are plotted on the plan included with the companion Project Grading Report. Buttresses er stgbi I izati on fi II 'Nere not deemed necessary, nor constructed for the subject lots. Based on our inspection (: · :)sic conditions of the site, the subject lots are satisfactory for the intended use from a geologic point -of view. Respectfully submitted, PACIFIC SOILS ENGINEERING, INC. Reviewed by: By_~----..:_:.~~''a.~. --==:_ RICHARD E. :LOWNES, E.G. 108 61-tkQ ~ REX P. KETTER, Vice President Dist: (6) Addressee l'H1· PACIFIC SOILS ENGINEERING, INC. ~ 17921 SKY PARK CIRCLE {SUITE G) IRVINE, CALIF. 92714 ~-~ TELEPHONE: (714) 557-9450 Newp~rt Shores Builders P .0. Box A Huntington Beach, CA 92648 Attention: Subject: Reference: Gentlemen: Mr. Mike Jager Project Soil Engineering Grading Report; Tract 72034, Lots 1, 44 and 135 {and adjacent streets), Offsite Fill Areas Souther! y of Lots 269, 270, and· 310- 312, and Retension Basin Area, in the City of Carlsbad, California Preliminary Soil Engineering and Engineering Geologic Report and Engineering Geologic and Soil Engineering Review of Grading Plan for Tract 72-34, dated July 5, 1974, by Pacific Soils Engineering, Inc. (W .O. 100236) L.A. COUNTY OFFICE 1402 W. 240th Street Harbor City, Ca. 90710 (213) 325-7272 or 775-6771 VENTURA COUNTY OFFICE Post Office Box 75 Thousand Oaks, Ca. 91360 (213) 889-9919 . (805) 495-6513 January 11 , 1977 Work Order 100236A This report presents soil engineering data and test results pertaining to the placement of compacted earth fill on the subject property. Preliminary foundation criteria are also included in this report for Lots 1, 44 and 135. All fills, cuts or processing of original ground under the purview of this report have been completed under our inspection or accepted by this finn, and are in compliance with f .H.A. criteria and the Grading Code of the City of Carlsbad, California. All work under c~r purview was accomplished in accordance with the "Earthwork Specifications" contained in the above-referenced investigation report. Completed work has been reviewed and is considered suitable for the intended use. All slopes are considered grossly and surficially stable and will remain so under nonnal conditions. Work Order l 00236A January 11, 1977 Compaction test results are presented in Table I, and approximate locations of tests are shown on the enclosed grading pion (7 sheets). Also shown on the plan are locations of tests taken in adjacent areas. These tesf· results have been submitted in previous grading reports. Laboratory Standard: ASTM:D, 1557-70T Opt. Moist. (%) Max. Dry Density (lbs./ cu. ft.) % Swell* Soil Type B -Clayey Sand C -Clayey Sand D -Clayey Sand E -Clayey Sand F,;. Clayey Sand G -Sand H -Clayey Sand I -Sand L -Silly Sand N - C : : i . ( <, n.J 14.0 11.0 12.5 13.5 15.0 15.0 15.5 13.0 12.0 12.0 110 .. 0 127.5 118.0 115.5 113.0 108.5 111 .5 117 .o 120.5 120.0 650psf o.o o.o 0 .1 ND o.o ND ND ND ND ND ASCE --ND ND ND 8 ND ND 4 ND ND NO * Swell test's were re(r., ,,e-inch high ring to 90 percent relative compaction utilizing material at op!· ,ure for samples to be surchc:rged at 650psf. Samples were inundated for 24-hours: ,n amount of swell was recorded. ASCE denotes in accordance with ASCE Expansion Index Test. ND denotes not determined. 1. Prior to the placement of the compacted fill, the exposed natural surface wos scarified, watered as necesscliy and compacted in-place, suitable to receive fill. Where necessary, alluvial materials in canyon swale bottorns were removed to eHlier in-place bedrock, or competent naturo l soi Is. 2. Fill consisting of the above soil types was then placed in thin lifts, \4ratered as necessary and compacted in-place too minimum of 90 percent of the laboratory standard utilizing tractor-drawn sheepsfoot type rollers and heavy earth moving equipment. Each fill was treated in a like manner. PACIFIC SOILS ENG!NEEAf"'r.: '" ·- Page 2 Work Order 100236A January 11, 1977 Page 3 3. Fili placed on slope gradients steeper than 5-horizontal to l-vertical was keyed and benched into bedrock. The upper soils were stripped and/or benched out on the shallower slopes in such a manner that all compacted fill is in contact Vlifh intact bedrock or competent soi Is. 4. All removals and excavating for canyon cleanouts, and proc~ssing in preparing fill areas were inspected and approved by this firm's representative prior to placement of any fill. 5. Compodion tests were taken for each om..~ to two feet of fill placed. The maximum vertical l>Pth of f';f' !:,-ed is on the order of 40 feet on Lot 1, 16feet on Lot 44 and 8 feet on Lot i -. · Compacted fl I I was placed to within one {l) to six (6) feet of the finished grade as shown on sheet 10,on Lot l. The intention is to use miscellaneous clean-up dirt from the residential pads and streets, to bring this pad to grade. The materials should be compacted, tested and inspected by a soil engineering firm. 6. . FHI placed offsite (south) of Lots 310-313 is i:,:,nsidered a structural fill. Preparation ,.>for filling followed procedures as outlined in No. 4 above. Prior to building any structures in this area however, plans should be reviewed and approved by o qualified soil engineering firm. 7. Excess soil was placed offsite southerly (generally) of Lots 269, 270, and 315, and the end of Manzanita and Columbine. This fill is not considered as a structural fill, nor is it shown on the enclosed plans. Cleanout prior to filiing, end compaction testing and inspection was not accomplished for th is fi II. PACIFIC SOILS ENGINEERING, INC, Work Order 100236A January 11 , 1977 8. Compacted fill sloi:;es were back-rolled as they were brought to grade at approximate four-foot intervals. At the completion cf fill placement, the slope was uniformly Page 4 compacted by track-rolling and finished by cutting and trimming bock to the compacted core. Slope tests were made after completion of trimming. All slope densification has been completed and the slopes ore considered stable under normal conditions. 9. Materials encountered in cut and utilized for compacted fill ranged from non-to 10. moderately--expansive in nature. An evaluation of expansiveness of the subject lots should be accomplished at such time that specific plans are available. The following crite,, . :,rcfiminary foundation design for the subject lots. a) The recommended bearing value for both th~ interior and exterior footings is 1500 lbs./sq.ft. having a minimum embedment of 12-inches and having a minimum width of l ~· inches. b) A lateral bearing value of 300 lbs/sq.ft. per foot of depth of a maximum of 1500 lbs./sq.ft. may be utilized. A lateral sliding coefficient of 0.4~ may be used in design. The above values may be increased one-third for short duration loads such as seismic and wind loads. 11. Specific recommendations for foundation will depend upon the type of structures proposed, foundation loads, and the intended use(s) of the facilities. Development plans for future foci lities should be submitted to a soi I engineering finn for review and comment. PACIFIC SOILS ENGINEE:Rlf\JG, INC, Work Order l 00236A January. 11, 1977 Respectfully submitted, PACIFIC SOILS ENGINEERING, INC. Reviewed by: G2u ~ QsZd]i::; REX P. KETTER, Vice President Dist: (6) Addressee AJJ:RPK/vll PACIFIC SOILS ENGINEERING, INC, Page 5 Work Order 100236A TABLE Date of Test Test Elev. Moisture Dry Density Relative Soil Test No. Location {feet) {%} {lbs/cu.H.} Comj.% Tbpe 9/4/76 129 Manzanita 103.0 11.7 111 .5 9 . SC 9/7/76 131 Lot 44E 107.0 11.7 107.5 91 D 132 lot 44E 107.0 13.0 111.0 94 D 133 · Lot lE 96.0 12.4 113.2 96, D 9/8/76 143* Manzanita 105.0 14.3 109.5 91 E SC 144 Manzanita 108.0 9.9 107.6 92 E SC 145* Manzanita 103.0 13.0 110.0 94 E SC 146 Manzanita 99.0 11.7 113 .2 97 E SC 147 . Alga Road** 108.0 15.6 111.5 95 E SC 148 lot 1 111.0 14.9 111 .o 94 E SC 149 Lot 1 1CJ6.0 13.0 115.0 9i3 E SC 150 lot 1 95.0 13.0 113 .o 97 E SC 151 Lot l 93.0 10.5 108.5 92 E 152 lot 1 98.0 14.3 112.6 96 D 153 Lot 1 100.0 15.6 110 .5 94 D 154 Lot 1 '.,.., 0 11. l 106.8 91 D 155 Lot ·1 ' .o 16.3 111 .4 94 D 156 Lot ,~4 JuJ.o 13.0 108.6 92 D 157 Lot 44 101.0 12.4 109.5 93 D 158 Lot JJE 98.0 13.6 112.4 95 D . 159 lot 1-E 94.0 15.6 115.0 97 D 9/9/76 173 Alga Road** .110.0 15.6 114.0 97 D, 174 Alga Road 110.0 12.4 110 .. 5 94 D 175 lot l 108.0 13.6 108.0 92 D .176 lot 1 108.0 12.4 112 .o 95 D 177 Lot l 105.0 11.7 107.6 91 D 178 Lot l 101.0 10.5 113.5 96 D 9/13/76 179 Alga Road** 112.0 13.6 106.9 91 E SC 180 Alga Road** 112.0 11 • 1 114.4 98 E SC 181 Manzanita 114.0 13.0 109.6 98 E SC 182 lot 1 108.0 13.6 112.7 96 E SC 183 Manzanita 108.0 16.3 113.3 97 E SC 184 Manzanita 108.0 11. 1 114.3 97 D SC 185 lot 1 106.0 11.1 110.4 94 D SC 186 Lot 1 103.0 11.7 107.3 91 D SC 187 Lot 44-E 106.0 13.0 109 .4 93 D 188 lot 44-E 106.0 14.3 112 .3 95 D 189 Lot 44 108.0 15.6 111.1 94 D 190 Lot 44 108 .o 12.4 -111.7 95 D · 9/14/76 191 Manzanita 117 .o 10.5 118.2 93 C 192 Manzanita 115 .o 12.4 116.0 91 C 193 Manzanita 112.0 11.5 120.Q 94 -C PACIFIC SOILS ENGINEEc:11rur.= ,,._,,.. Work Order 100236A Table I Cont. Page 2 9/14/76 194 lot 1 106.0 9.9 117 .4 92 ,C 195 Lot 1 108.0 11. l 119 .3 94 C 196 Lot 1 110 .o 13.0 109. l 92 D 197 Lot l 112.0 11.7 107.3 91 D 198 Lot l 112.0 14.3 110.0 93 D 199 Lot 1 112 .o 13.6 111 .5 94 D 200 Lot 1 110.0 13.0 108.4 91 D 201 Lot l 108.0 12.4 113 .o 96 o· 202 Lot l 111 .o 11. l 111.0 94 D 9/15/76 203 Alga Road** 119 .o 17.0 103~2 94 B SC 204 Alga Road 119.0 15.6 99.5 90 B SC 205 Alga Road 121 .o 14.3 101.6 92 B SC 206 Alga Road** 121.0 16.3 104.0 94 B SC 207 Manzanita 118.0 14.3 102. l 93 B SC 208 Manzanita 118.0 10.5 111.3 94 D 209 Manzanita 116.0 13.0 109.0 92 D 210 · Lot l 121 .o 11. l 112.5 95 D 211 Lot 1 119 .0 9.9 111.0 94 D 212 Lo, -. .,-, 12.4 107.2 91 D SC 213 lot i i ':J 12.4 115.C 97 D SC 214 lot 1 i i :j .o 13.6 110.0 93 D SC 215 lot 1 '113 .o 12.4 109.0 92 D 216 lot l 110.0 13.0 111 .5 94 D 217 Alga Road** 111 .o 10.5 107.5 91 D 218 Alga Road 114.0 14.3 110.2 93 D 219 lot 44 117 .o 12.4 108.0 92 D 220 LotM 120.0 13.6 112.3 95 D 221 Lot 44 120.0 11 .1 114.0 97 D 222 lot 44-E 116.0 13.0 106.7 92 E 223 lot 1-E 97.0 11.7 110.0 94 E 224 Lot 1-E 100.0 J3.6 111.0 95 E 9/16/76 227 Alga Road** 120.0 13.0 111.7 95 D SC 228 lot 44 120.0 12.4 107.0 91 D SC 229 Lot 44 120 .o· 10.5 106.8 90 D SC 230 lot 44 120.0 11.7 110.0 93 D SC 231 lot 44-E 118.0 13.6 111.0 94 D .232 Lot 44-E 118.0 13.6 109.2 93 D 233 Alga Road** 120.0 16.3 102.2. 90 F 234 Alga Road 120.0 14.3 105.0 93. F 235 Manzanita 119 .0 17.0 103.8 92 F 236 Manzanita 117 .o 17.6 110.0 97 F 237 lot 1 120.0 14.9 107.0 95 F 238 lot 1 120.0 18.3 108.2. 96 F 239 Lot 1-E 103.0 17.0 107.2 95 F 240 Lot 1-E 106.0 15.6 104.5 92 F 9/17/76 251 Alga Road** 123.0 15. 1 105.0 93 F 252 Lot l 123.0 16.3 104.5 93 F 253 lot 1 123.0 13.9 111.9 95 D PACIFIC SOILS ENGINEERING, INC, Work Order 100236A Table I Continued Page 3 9/17/76 254 Lot· l 123.0 13.4 113.3 96 · D 255 lot 1 122.0 15.9 110. l 97 F 256 Lot l 122.0 16.8 "106. l 94 F 257 lot 1 i22.0 17.3 103.5 91 F 258 Lot 1-E 109.0 15.3 111.3 93 F 259 Lot 1-E 112.0 17.6 102.9 91 F 9/18/76 275 Alga Road** 124.0 16.3 106.3 94 F SC 276 Alga Road 124.0 17.0 103.2 91 F SC 277 Lot l 125.0 14.3 107.0 95 F SC 278 Lot l 125.0 ·15.6 104.2 92 F SC 279 Lot l 125 .o · 14.9 102.5 91 F 280 lot 1 124.0 18.3 105.0 93 F 281 lot l 123.0 17.0 104.6 93 F 282 lot 1-E 115.0 15.6 106.0 94 F 283 Lot 1-E 118.0 14. 1 108.6 92 D 284 Lot 1-E 118.0 14.8 106.7 90 D 10/4/76 · 459 Lot 44-E 121.0 18.3 104.0 96 G 460 Lot 44-·E 124.0 15.6 100.3 92 G 461 Alga Road** 122. 17 .6 99. 1 91 G 462 Alga Road 125, 14.9 102.6 95 G 463 Lot 44 124.0 14.9 102.9 94 G 464 lot 44 124.0 13.6 100.8 93 G 465 Alga Road** 125.0 19.0 104. l 96 G 466SD Manzanita 118.0 17.0 102.5 94 G 467SD Manzanita 115.0 15.6 98.3 91 G 10/6/76 489 Lot 1-E 114.0 13.0 111.0 95 490 Lot 1-E 114.0 14.3 108.1 92 491 Lot 1-E 115.0 13.6 109.5 94 10/7/76 492 Lot 1-E 118.0 10.5 110.3 94 493 Lot 1-E 117 .o 11.7 106.5 91 494 Lot 1-E 116.0 9.9 111.0 95 495 Alga Road** 127.0 13.0 113.2 96 496 lot 1 127.0 14.3 108.0 92 497 Manzanita 124.0 13.6 -107 .5 92 498 lot 1 126.0 12.4 110.? 94 499 Lot 1 126.0 12.4 108.5 93 500 Lot 1 122.0 14.9 107.0 91 501 Lot l · 122 .o 13.0 111.3 95 502 Lot l 120.0 13.6 110.0 94 503 Lot l 123.0 11.1 106.4 91 10/8/76 504 Alga Road 176.0 15.6 101 .4 93 G SC 505 Alga Road 180.0 17.0 105.0 96 G SC 506 Lot 135 176.0 14.9 98.6 91 ·G SC 507 Lot 135 178.0 17.6 100.2 92 G SC 512* Lot 44 140.0 12.4 109. l 93 I 513 Lot 44 130.0 14.3 107.3 92 I 514 Lot 44 135 .• 0 16.3 98.0 90 G 515 Lot 44-E 152.0 14.9 100.6 93 G , PACIFIC SOILS EI\IGINEEAING, INC. Work Order 100236A Table I Cont. Page 4 10/12/76 561 Lot 135 180.0 11. l 110. l 94 I SC 10/13/76 567 lot i-E 130.0 12.4 107.0 91 . , H 571 Alga Road** 130.0 15.6 111.0 95 H 572 Alga Road 133.0 14.9 · 102.8 91 F 573 Alga Road 137.0 15.6 104.0 92 F 10/14/76 576 Alga Road** 140.0 11.7 111.3 95 577 Alga Road 143.0 13.0 107.4 92 578, Alga Road 146.0 13.6 109.0 93 579 Alga Road 149.0 12.4 112.6 96 ~80 Lot 44 138.0 14.3 112.0 96 581 Lot 44 141.0· 13.0 106.3 91 582 Lot 44 144.0 10.5 112 .1 95 10/15/76 598 Lot 44 147.0 9.9 107.5 92 SC 599 Lot 44 150.0 12.4 108.6 93 SC 10/18/76 620 Lot 1 129.0 13.0 109.0 93 621 Lot 1 129.0 14.9 106.5 91 622 Lot 1 132.0 11.7 111 .o 95 SC 623 Lot l 132.0 13.0 110.2 94 SC --10/20/76 6.55 Lot 44 152.0 13.0 112.3 95 D 656 Lot 44 152.0 10.5 109.0 92 D 657 Lot 44 152.0 12.4 110.4 94 D 658 Lot l 134.0 11.7 111.6 95 D 659 Lot 1 134.0 13.0 107.0 91 D 10/21/76 660 Alga Road** 142.0 10.5 112.1 96 661 Alga Rood** 145.0 13.0 106.0. 91 662 Alga Road 148.0 14.3 109.2 93 663 Lot 44 127.0 11 .1 108.0 92 664 Lot 44 130.0 11. 1 107.5 92 665 Lot 44 130.0 13.6 111.0 95 666 Lot 44-E 132~0 10.5 108.5 93 667 Lot 44-E . 136.0 14.9 107.0 91 668 · Lot 44 · 150.0 13.6 112. 1 96 · 669 Lot 44 152.0 12.4 109.4 94 670 Lot 44-E 145.0 11.7 110.3 94 671 Lot 44-E 148.0 13.0 107.7 92 12/1/76 1244* Lot 312 ** 60.0 13.0 109.1 92 D 1245 Lot 312** 64.0 12.4 111.2 94 D : 12/2/76 1246 Lot 311** 68.0 11.7 110.4 94 D 1247 Lot 31~** 72.0 13.6 111 .o 94 D 12/8/76 1318 Lot 312** 75.0 10.5 109.2 91 N 1319 Lot 311 ** 75.0 12.4 111 .o 93 N 1320 Lot 312** 79.0 9.9 110.4 92 N 1321 Lot 311** 78.0 13.6 108. 1 90 N 12/10/76 1360 269** 39.0 9.9 109.5 91 L SC 1361 269** 43.0 12.4 110.5 92 L SC 12/14/76 1420 269** 43.0 12.4 108.5 90 L SC 1421 270** 47.0 13.6 112.0 93 L SC 12/15/76 1427 Retension Basin 30.0 11. l 100.8 92 L PACIFIC SOILS ENGINEERING, INC. Work Order 100236A Table I Cont. 12/16/76 1430 Lot 44 133~0 13.6 106. 1 91 I 12/15/76 1429 270** 55.0 13.0 111 .3 92 L SC 12/15/76 1428 269** 51.0 14.3 112 .5 93 L SC 12/16/76 1431 Lot 44-E 139.0 14.3 110.0 94 I 1432 Lot 44 154.0 10.5 112.5 96 I 1433 Lot 44-~ 156.0 9.9 108.0 92 I 1434 Lot 44 160.0 12.4 111.0 95 I 1435 Lot 44 164.0 12.4 107.5 92 I SC 12/20/76 1442 270** 60.0 14.3 116.0 96 L 1443 270** 63.0 15.6 111 .4 92 L 1444 270** 66.0 12.4 109.0 90 L 12/21/76 1446 316** 90.0 12.4 115.0 95 L SC 1447 309** 92.0 13.0 108.7 90 L SC 1448 Manzanita** 52.0 11.7 n1.o 92 L SC 1449 269** 63.0 11. l 110.2 91 L SC 12/27/76 1462 310** 85.0 10.5 108.6 90 L 1463 312**· 85.0 13.6 113.0 94 L 1464 313** 87.0 9.9 110.5 92 L 1465 311 ** 87.0 12.4 108.5 90 L 12/28/76 1466 270** 72.0 13.0 111.0 92 L 1467. Retension Basin 29.0 13.0 114.2 95 L 1468 Retension Basin 34.0 9.3 108.0 90 L 1469S 246** 47.0 11.7 110.0 91 L 12/29/76 1470 Lot l 129.0 12.4 112.5 93 L 1471 Lot 1 126.0 10.5 113 .6 94 L 1472 Lot l 135.0 11.1 109.4 91 L . 1473 Lot l 139.0 13.0 111.3 92 L * Test in compacted natural ground s Slope test SD Test in storm drain backfill E Test in San Diego Gas & Electric Easement, adjacent to Lot No. ** Test offsite and/or adjacent to Lot No. and/or street SC Test by sand cone method; remaining tests by drive tube Areas failing to meet minimum compaction requirements were reworked and retested. Only · passing tests are shown in the above table. PACIFIC SOILS ENGINi=ERING, INC.