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Home My WebLink AboutCT 06-06; VILLAGES OF LA COSTA OAKS NORTH 3.7; LETTER OF OPINION REGARDING ELIMINATING THE TERRACE DRAINS; 2006-08-25-~_C_~-~_P_~_R_~_T_~_.n----------------------~--G-E-m-EC-H-NIC-M--C-ON-S-U~-AN--ffi~ Project No. 06105-52-20 August 25, 2006 Real Estate Collateral Management Company c/o Morrow Development Incorporated 1903 Wright Place, Suite 180 Carlsbad, California 92008 Attention: Mr. Tim O'Grady Subject: VILLAGES OF LA COSTA -THE OAKS NORTH NEIGHBORHOOD 3.7 CARLSBAD, CALIFORNIA CONSULTATION RECEIVED APR 19 2007 ENGINEERING DEPARTMENT Reference: 1. Update Geotechnical Investigation, Villages of La Costa -The Oaks, Carlsbad. California, prepared by Geocon Incorporated, dated-August 3, 2001 (proj~ct No. 06405-12-04). 2. Mass Grading and Erosion Control Plans for: La Costa Oqks Nor.th. Neighborhoods 3.6 and 3.7, Villages of La Costa, City oj Carlsbad. .Galijon1ia, prepared by Hunsaker & Associates San Diego, Inc., print dated July 18, 2005 (Drawing No. 429-7C). . Gentlemen: In accordance with the request of Mr. David Blalock of Hunsaker and Associates, this letter has been prepared to express our opinion regarding eliminating the telTace drains on the proposed slopes throughout the project site. In om' opinion, the use of terrace drains on cut or fill slopes exce~ding 30 feet in height is not necessary to maintain gross stabi11ty of the slopes. However, the _proper instal1;:ttiol1 and mailitenanc~ of terrace drains should measurably reduce the potential for surficial slope erosion, particularly on fill slopes. If used, we recommend that terrace drains be constructed at a drainage gradient of at i'east 5 percent. In addition, the need to properly maintain the drains is important. Drains' that are not periodically cleaned of vegetation and debris could result in significant slope distress and erosion'. Should you have any questions regarding this letter, or if we may be of further servIce, please contact the undersigned at your convenience. Very truly yours, AS:EA:dmc (1) i\ddressee (2) Hunsaker and Associates Attention: Mr. David Blalock 6960 Flanders Drive • San Diego. California 92121·2974 • Telephone (858)558-6900 • -Fax (858) 558-6159 ::c ~ I> • p a a .... II • - " / / / / o 100' 200' 300' ~~~~I. __ I , , GRAPHIC SCALE , \ \ \ ~ " j ! '" \ \ '. " " --::"1:"(", d / PlANNING ENGINEERING SURVEYING ..." ~: .. ""~-~ ;::-::;~;;::: ~ " , ' ED BY: HUNSAKER & ASSOCIATES SAN DIEGO, INC. 10179 Htlennekens Street San Dle&o, Ca 92121 PH(8S8)SS8-4S00, FX(856)ssa,1414 " " , . ; / /..... , {" .. ,-/'" /~, ~~--.-' ,- '< '..--- MASTER TENTATIVE TRACT MAP VILLAGES OF LA COSTA City Of Carlsbad, California / / \" ,~ ~ -- -~; 'J.J " SHEET 4 OF 19 " . / : / DEBRIS:\ " / "-, , '>, ~'-"'\ -'J' " ~-. \, :. '" -/ ,;~~ L , \ > ~', , '" " " , , / / 'k' , ' ! FOR CONTINUATION SEE SHI-I- I \ \ , " : ' , I f " , , , " ~/ 2 ~ ... ~--------.... ................. ~-~ / ,,/ .. -----._-_ ... -... 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Hep OP-EN-sP.~ct :. -~ __ ~_ .~'. /J '12,~ .Ae~r!? __ / \ \ Sp \ , \. \ , , (TYPICAL SHEET NO, , .' ~ /',_ ..... -<, .. -. "- / , / ( f (- -' :" r i , .' f / J j , ,/ APN \ , , .. / / I CT 98-04/H 0 P 99-02 223-08J-01 ! ,'e-,m,pe-MELROSE DRIVE [XACT'AUGNME:NT TO Elf DOERMINED j ! i FUTURE: GRADING ,..--' ) .~-.-.. ~/ ~~.,o..-r"'· ••• J. ____ ---..... ----- PREPARED BY: PlANNING ENGINEERINC SURVtYING HUNSAKER & ASSOCIATES SAN DIEGO, INC 10179 HuennekellS Street San Diego, Ca 92121 PHIB58)558·4500· FX(858)558-1414 " / /",., .. - , .. "., -"- / I .? / ~:""t~· ~~-·~~"~~.1~~ ---- ) " ' , " J~- " /'," , ',.~ " ' ~j,'-L: " . -:-: .. "O~' ';: -" -'~'<. MASTER TENTATIVE TRACT MAP , VILLAGES OF LA COSTA SHEET 7 OF City Of Carlsbad, California 19 R,\0071 \&Pln \00 71 t007 .dwgE 0812JDec-19-2000'13'15 " . :.' , , , .q- I-UJ I.U I (J) I.U LU (J) Z 0 -~ ::J Z -I- Z 0 0 a:: 0 I.L ~OR OFF-Slry; , BE OBT,.,INED , / FOR CONTINUATION SEE SHEET 5 -' . i: ' < J . , . ' . . , iSJ ,'17£: TO'I!:XISTING .: Pt: '.. BROW OITGH • ·"r'::-;" ", : -J ,9 CT 85-5 .I ) NIT ,":1 " J < FOR CONTINUATION SEE SHEET 7 FOR CONTtNUATION SEE SHEET 9 """ \ \ ~ , , ;y: . ,), . ~ -' --. / i / I j , f SYS'TEM, (SEE SHEff LOT-OS HCP OPEN SPA.C/£ 157.2 'Ar;RES i CT 98-04/HDP 99-02 " , \ " "~ ..... ---~.~ . ..... ~'" i -'--''0-- ).\PN ''-,.--"--<;-,~. .-' .-' / { , J ) ,j,: /. .'/ . ' /. ' ./ ' ,,-/', ,.. , " , . ?? ,':. ~-- FOR CONTINUATION SEE SHEET 7 PREPARED BY: SHEET MASTER TENT ATIVE TRACT MAP 8 HUNSAKER & ASSOCIATES VILLAGES OF LA COSTP" SAN DIEGO, INC. OF PlANNING 10179 Huennekens Street 19 ENQNEffiING San Diego, Ca 92121 City Of Carlsbad, California SURVEYING PH(aS8)"a·.Soo· 'X(8SB)sS1l-1414 R,\0071 ,~Pln \0071 t008.clwg[ 0812lDec" 20-2000.07.26 , , i l~~ [- \' i i i , , . CONTINUATION SEE l!) I-LJ.J W I Cf) W LJ.J Cf) Z 0 -~ :J Z -I- Z 0 () \ ".~\ .~~\ Qis FOR CONTINUATIO,N SEE SHEET 8 \ , " , , , ! , , , \ , , r / , \ , ; J ~ , I HUNSAKER & ASSOCIATES SAN DIE CO.l N!C , PlANNING 10179 Huennekens Street ; ENGINEERING San DIoSo, Ca 92121 , SURVEYING PH(656)5S8-4500· FX(658)SS6-1414 , .. , • CT P 99-02 " MASTER TENTATIVE TRACT MAP VILLAGES OF LA COSTA City Of Carlsbad, California R,\0071 \8,Pln \0071 t009,clwg[ 0812JDec -20-2000,07,30 --I " " " " " " " CD I-W W I Cf) W W Cf) FOR CONTtNUATION SEE SHEET 11 fXISnNG 16" '-.... ' 'WATfR, MtJJN NAP MAHR RESIEM\i(;Jt1/ UATION SEE SHEET 9 ----'" ----- , i . . -~--------... -~- HUNSAKER & ASSOCIATES SAN OtEGO, INC PLANNING 10179 Huennekens Street ENGINEERING San Diego,. Ca 92121 SURVIYING PH[858)SS8-45QO, fX[8S8lsS8·1414 CT 98-04/H D P 99-02 ! ," " . " " / " 300' / --{. -. \ . - ", .'--.- • MASTER TENTATIVE TRACT MAP VILLAGES OF LA COSTA City Of Carlsbad, California R,,0071 p SHEET 10 OF 19 I [, , L I~ , - . . 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Ca 92121 SURVEYING PH(6S8ISSB-4soo, f)(65S)SS6·1414 CT 98-04/HDP 99-02 ..,- ..,- FOR CONTINUATION SEE SHEET 11 HILLSIDE DEVELOPMENT PERMIT SHEET MASTER CONSTRAINTS MAP 12 VILLAGES OF LA COSTA OF City Of Carlsbad, California 19 R'\0071 \&Plt'\\0071 t012.dwg[ 0812lDec-20-2000:07·35 / . .... , J ,,, ......... ---: ~- ~ . . , I ~ , ". ;' -'. -' " h, " I I I I . , " 0 :.. - -. i. , , I "- I' i, I- i i. '. , , < " ~ i C ~ , ~ c 1l i_ I I : , - , " . . - 0.- " "- .:::: , " I' " -, 0 ,,' I-W W 1: C/) W W C/) Z o -I-« :::> z -I- Z o o 0: o LJ.. FOR . \ ,>' " ; ~ ____ ...... --. _....L _~ __ .J-_~-'- , , , . , , 1 [ :' i i I I ~--. ! i \ , l , , J I ".J"1""\TIO·N SEE SHEET 14 { .l ~ ! ! y , j , (fYPICAL-"'---1 DETAIL SHEET NO. ~.,.,_.U. .1.-- FOR CONTINUATION SEE SHEET 12 CT 98-04/HDP 99-02 , , 0 0 ~ II .' ~ Gj -J ~ ,. ---------------------~---- -0---1o~ -2-00-' ~~~I 300' !-GRAPHIC SCALE VILLAGES OF LA COSTA THE OAKS HUNSAKER & ASSOCIATES SAN OIECO. INC PlANNING 10179 Huennekens Street ENGINEERING San Dieg<>, Ca 92121 SURVEYING PH(656)556-1500' FX(656)556·1414 MASTER TENTATIVE TRACT MAP VILLAGES OF LA COSTA City Of Carlsbad, California SHEET 13 OF 19 R. \0071\~Ptn\0071 t013.Clwg[ 0812lDec '20-2000,07,38 f ) rfI1 ·1 r=.OR CONTI NYA'f;f ON SEE SHEET 15 \ \ /---~ , ! \ , , ::c <P I> " Q ~ '" ..-/ .... / ... II) .... N Q Q "-I FOR CONTINUATION SEE SHEET 18 \ CT 99-Q4/HDP 99-02/SUP Q1-03/PIJD, 01-08 PROPOSED BUS STOP -BY OTHERS TFNTJ.\ TiVF MAP NO. 42 J UNiVERSiTY COMMONS ''-·FJt/<;TMJr. 18" RCI' STORM DRAIN __ --'(\C.'FUTURE ALIGNMENT -MELROSE DRI:.:I'£:<..) __ _ '-EXISnNG 48" RCP STORM DRAIN 't--EXISTIAfG 42" RCP STORM DRAIN , , , , " , -f- , 0 <;;) ~ 11 • - L...i -..I (3 C!) 100' 200' ~~~ GRAPHIC SCALE 300' FOR CONTINUATION HUNSAKER MASTER TENTATIVE TRACT MAP & ASSOCIATES VILLAGES OF LA COSTA SAN DIECo. INC PlANNING 10179 Huennekens Street ENGINEERING San Diego, Ca 92121 City Of Carlsbad, California SURVEYING PH(856)5S8-4S00· FX(858)5se.1414 R'\OO71\~ DR SHEET 14 OF 21 i - ! , , 11 " ---. - -- -