!uly 2, 2013 kelly Lwlng-1oledo ueparLmenL of 1ransporLaLlon - ulsLrlcL 7 100 SouLh Maln SLreeL, SulLe 100 Los Angeles, CA 90012 Draft I|nd|ng of No Adverse Lffect for Sk 710 North Study, May 201S uear Ms. Lwlng-1oledo, 1hank you for Lhe opporLunlLy Lo provlde commenLs and feedback regardlng Lhe drafL llndlng of no Adverse LffecL for Lhe S8710 norLh SLudy pro[ecL released ln May 2013 and recelved from your offlce ln mld-!une. 8elow you wlll flnd our speclflc commenLs on Lhls documenL, followed by commenLs concernlng Lhe S8 710 norLh SLudy SupplemenLal ConsLrucLlon vlbraLlon lmpacL AssessmenL for PlsLorlc roperLles (Wllson lhrlg Assoc., 2013). nav|ng carefu||y rev|ewed these documents, asadena ner|tage cannot support the stated conc|us|on that the proposed pro[ect w||| have no adverse effect on h|stor|c resources. As you w||| see from the spec|f|c comments that fo||ow, we found a number of |ncorrect statements, |ncons|stenc|es, m|ss|ng |nformat|on, and, most |mportant|y, what we f|nd to be unsubstant|ated conc|us|ons |n these documents.Among Lhe mosL Lroubllng lssues we have ldenLlfled are: !1he fallure Lo adequaLely address subsldence rlsks relaLlve Lo Lhe acLual Lypes of hlsLorlc bulldlng foundaLlons and era(s) of consLrucLlon.!1he lack of lnformaLlon abouL excavaLlon-lnduced ground seLLlemenL effecLs on hlsLorlc properLles ln varlous Lables ln Lhe documenLs, Lhough referenced ln Lhe narraLlve. !1he conslsLenLly mlsleadlng use of depLh measuremenLs Lo Lunnel cenLerllnes, meanlng LhaL Lhe acLual depLh aL Lhe Lunnel crown would be aL leasL 30 feeL closer Lo Lhe surface where exlsLlng bulldlngs are locaLed. !numerous lnconslsLencles ln Lhe use of hlsLorlc resource ldenLlflcaLlon and Lermlnology (hlsLorlc resource, hlsLorlc properLy, parcel, group) !1he lack of deflnlLlon ln Lhe LffecLs Analysls of sllghL", moderaLe", moderaLe-severe", and severe" effecLs. !1he fallure Lo sLudy or even reference Lhe venLllaLlon Lowers for Lhe lreeway 1unnel AlLernaLlve proposed along Colorado 8oulevard, poLenLlal lmpacLs of Lhelr consLrucLlon, and Lhe vlsual and aesLheLlc lmpacLs of Lhese Lowers Lo Lhe ad[acenL PlsLorlc ulsLrlcL. A number of addlLlonal and more deLalled commenLs and quesLlons are lncluded below. We hope LhaL Lhls feedback ls helpful as your offlce works Lo revlse Lhe drafL documenL. We wlll be pleased Lo revlew Lhe flnal verslon. Slncerely, Susan n. Mossman!esse LaLLlg !"#$%&'(# *'+#$&,+-+#.#+(/&',0 *'+#$&,+ S8710 norLh SLudy: urafL llndlng of LffecL asadena PerlLage CommenLs !uly 2, 2013 age 2 CPA1L8 1 - lnLroducLlon, p1-3 1hls documenL lncorrecLly concludes LhaL no deLecLable rlsk of adverse effecL Lo any of Lhe hlsLorlc properLles would occur because of consLrucLlng Lhe freeway Lunnel. 1hls concluslon confllcLs wlLh: -SecLlon 3.3 L81 AlLernaLlve regardlng Lhe prlmary effecLs Lo hlsLorlc properLles relaLed Lo consLrucLlon -SeLLlemenL 1M documenL (!A 2013) prepared for Lhe S8 710 norLh SLudy uLl8 -1hls documenL separaLes vlbraLlon lmpacLs from excavaLlon-lnduced seLLlemenL lmpacLs and falls Lo evaluaLe Lhem equally. 1hls documenL falls Lo adequaLely address subsldence rlsks and Lhe assoclaLed levels of vulnerablllLy based on Lhe Lypes of bulldlng foundaLlons and era(s) of consLrucLlon. age 1-3 of ChapLer 1 sLaLes LhaL: 1he remalnlng 13 hlsLorlc properLles are analyzed ln SecLlon 3.7 for effecLs due Lo excavaLlon depLhs of 100 fL or less and a correspondlng rlsk of excavaLlon-lnduced ground seLLlemenL or for effecLs from consLrucLlon and operaLlonal effecLs aL Lhe surface." Powever, Lhe lasL sub-secLlon ln ChapLer 3 ls 3.3.4.13. 1he ana|ys|s of the 13 propert|es that are |ocated w|th|n 100ft or |ess of the tunne| center||nes |s not |nc|uded |n th|s document. CPA1L8 4 - uescrlpLlons of PlsLorlc roperLles and 8esources 640 SouLh SL. !ohn Ave. 1he properLy ls mlsslng a erlod of Slgnlflcance. 233 Columbla SLreeL1hls properLy has number of feaLures early for lLs perlod of slgnlflcance and lLs ellglblllLy for lndlvldual llsLlng should Lo be re-evaluaLed. llgure 4-781he lmage should be recenL Lo reflecL Lhe same perlod of Lhe oLher flgures ln Lhe reporL, whlch are conslsLenLly wlLhln Lhe lasL year Lo Lwo years. 26 S. asadena Ave, llgure 4-124 1he resource descrlpLlon ls lnaccuraLe and does noL reflecL Lhe naLlonal 8eglsLer nomlnaLlon. 169 WesL Colorado 8lvd.1he properLy's conLrlbuLor sLaLus ls lncorrecL. 148 WesL Colorado 8lvd.Address should be 148-134 WesL Colorado. AddlLlonal resource lnformaLlon from Lhe naLlonal 8eglsLer nomlnaLlon should be lncluded. 161 WesL Colorado 8lvd.1he lnformaLlon glven does noL reflecL Lhe naLlonal 8eglsLer ulsLrlcL llsLlng. 281 NCk1n 8aymond 1he address lncorrecLly glves Lhe dlrecLlon as SouLh 8aymond, when lL should be norLh 8aymond. 1he correspondlng llgure capLlon ls also lncorrecL. AddlLlonally, nelLher Lhe address nor Lhe resource lnformaLlon corresponds wlLh Lhe updaLed naLlonal 8eglsLer ulsLrlcL llsLlng. S8710 norLh SLudy: urafL llndlng of LffecL asadena PerlLage CommenLs !uly 2, 2013 age 3 CPA1L8 3 - AppllcaLlon of Lhe CrlLerla of Adverse LffecL SecLlon 3.2 - L81 AlLernaLlve 1hls secLlon falls Lo sLaLe Lhe number of hlsLorlc properLles locaLed wlLhln Lhe L81 AL. 1he presence of groundwaLer ln and above Lhe range of excavaLlon ls referenced as a poLenLlal rlsk, speclflcally Lhe rlsk of ground seLLlemenL LhaL would desLablllze nearby bulldlng foundaLlons. 1hls rlsk ls noL ldenLlfled ln !acobs AssoclaLes/CP2M PlLL 2013: SeLLlemenL 1echnlcal Memo. SecLlon 3.2.1 Case SLudles8eferences Lhe Madrld M30 ro[ecL, buL unllke Lhe oLher Lhree case sLudles, glves no lnformaLlon abouL Lhe klnds of seLLlemenL or vlbraLlon lnduced lmpacLs from Lhe pro[ecL, nor Lhe Lype of soll ln whlch Lhe Lunnel was bored, whlch weakens lLs relevance as a precedenL. 1he uublln 1unnel pro[ecL ls referenced as precedenL, buL no deLalls are provlded regardlng how LhaL pro[ecL compares Lo Lhe one proposed for Lhe S8-710. SecLlon 3.2, 1able 3.3 1he LffecLs column only references vlbraLlon effecLs, whlle excavaLlon-lnduced ground seLLlemenL effecLs are only llsLed under Lhe noLes column. 1hls formaL ls mlsleadlng abouL Lhe range of poLenLlal lmpacLs Lo Lhe affecLed hlsLorlc properLles. Lxcavat|on-|nduced ground sett|ement effects shou|d be ||sted w|th other effects under the Lffects co|umn. SecLlon 3.3 lreeway 1unnel AlLernaLlve 1hls secLlon sLaLes LhaL Lhe Lunnel allgnmenLs would be locaLed beneaLh 48 hlsLorlc properLles aL a depLh ranglng from 78-230fL. 1he documenL also sLaLes LhaL of Lhese 48 hlsLorlc properLles, 37 are locaLed above Lhe Lunnel allgnmenLs aL depLhs ranglng from 110-230fL. 1he documenL falls Lo reference Lhe dlfference beLween Lhese flgures, whlch are 11 hlsLorlc properLles, locaLed above Lhe Lunnel cenLerllnes aL depLhs from 78-110 fL. 1he secLlon furLher falls Lo provlde any analysls of effecLs for Lhese remalnlng 11 hlsLorlc properLles and |ts conc|us|on |s therefore |ncomp|ete and m|s|ead|ng. 1he documenL ldenLlfles Lunnel depLhs as measured Lo Lhe Lunnel $#0+1'0#, whlch ls mlsleadlng. Clven Lhe lreeway 1unnel dlameLer of 60fL, a 78fL cenLerllne depLh ls equlvalenL Lo a 48fL depLh Lo Lhe Lunnel crown, whlch ls very shallow for Lunnel excavaLlon of any dlameLer, parLlcularly ln alluvlum soll, where excavaLlon-lnduced seLLlemenL effecLs are of serlous concern Lo hlsLorlc sLrucLures. We also noLe LhaL Lhe number of properLles glven LhaL would range from 110-230 fL above Lhe Lunnel cenLerllnes conLradlcLs Lhe Lwo dlfferenL flgures sLaLed ln Lhe documenL lnLroducLlon. lurLhermore, none of Lhe above flgures reflecLs Lhose glven for Lhe lreeway 1unnel AlLernaLlve ln !acobs AssoclaLes/CP2M PlLL 2013 1echnlcal Memorandum on oLenLlal SeLLlemenL LffecLs on PlsLorlc roperLles. S8710 norLh SLudy: urafL llndlng of LffecL asadena PerlLage CommenLs !uly 2, 2013 age 4 SecLlon 3.3, 1able 3.4 1he LffecLs column only references vlbraLlon effecLs, whlle excavaLlon-lnduced ground seLLlemenL effecLs are llsLed under Lhe noLes column. 1hls formaL ls mlsleadlng abouL Lhe range of poLenLlal lmpacLs Lo Lhe affecLed hlsLorlc properLles. Lxcavat|on-|nduced ground sett|ement effects shou|d be |nc|uded w|th other effects ||sted under the Lffects co|umn. SecLlon 3.3.3.1 LffecLs Analysls - L81 AlLernaLlve LffecLs vlbraLlon effecLs for Lhe 8aymond llorlsL PlsLorlc ulsLrlcL aL Lhe llllmore L81 SLaLlon excavaLlon slLe sLaLes LhaL nearesL polnL of excavaLlon would be 10 fL along Lhe enLlre wesLern boundary of Lhls hlsLorlc properLy." 1hls confllcLs wlLh Lhe hlsLorlc properLy boundarles lllusLraLed ln llgure 3-32 and wlLh varlous dlsLances ln SecLlon 3.3.3.6. ClarlflcaLlon of Lhe varlous Lunnel, cuL-and-cover, and sLaLlon excavaLlon dlsLances and depLhs for Lhe 8aymond llorlsL PlsLorlc ulsLrlcL ls necessary. SecLlon 3.3.3.6 LffecLs Analysls - 8aymond llorlsL ulsLrlcL See above, conLradlcLlng dlsLances of excavaLlon from Lhe ulsLrlcL's boundarles are glven LhroughouL Lhls secLlon and conLradlcL Lhose glven ln SecLlon 6.3.3 and lLs mulLlple sub-secLlons. AddlLlonally, Lhe locaLlon from whlch Lhese dlsLances are measured needs Lo be esLabllshed, clearly sLaLed, and conslsLenLly applled LhroughouL Lhe enLlre documenL. lurLhermore, no descrlpLlon ls glven for how Lhe area ls Lo excavaLed from where Lhe 18M excavaLlon sLops Lo where Lhe cuL-and-cover Lermlnal rall Lracks and crossover excavaLlon beglns. llgure 3-32 ls lnadequaLe and lnconslsLenL wlLh Lhe above referenced SecLlons. SecLlon 3.3.4.1 LffecLs Analysls - lreeway 1unnel AlLernaLlve LffecLs vlbraLlon LffecLs 1he documenL sLaLes LhaL excavaLlon expecLed Lo use Lhe same Lechnology descrlbed ln SecLlon 3.3.3.1 [L81 AlLernaLlve LffecLs, p 3-198], buL falls Lo sLaLe Lhe subsLanLlal dlfference ln Lunnel dlmenslons beLween Lhe L81 and lreeway 1unnel AlLernaLlves, whlch ls mlsleadlng. 1he Lunnel depLhs and correspondlng locaLlons glven ln Lhe vlbraLlon LffecLs secLlon conLradlcL Lhe flgures sLaLed ln prevlous secLlons, as well as Lhe depLhs glven by Wlllson, lhrlg & AssoclaLes, 2013 for Markham lace PlsLorlc ulsLrlcL. AddlLlonally, Lhe documenL glves depLhs Lo Lunnel $#0+1'0#., whlch ls mlsleadlng, glven Lhe lreeway 1unnel dlameLer of 60fL, a 73fL cenLerllne depLh ls equlvalenL Lo a 43fL depLh Lo Lhe Lunnel crown, whlch ls very shallow for Lunnel excavaLlon of any dlameLer, parLlcularly ln alluvlum soll. Cround MovemenL1hls secLlon does noL adequaLely clLe Lhe 2013 reporL upon whlch concluslons regardlng 18 hlsLorlc properLles were made, Lhls should be clarlfled. 1hls secLlon goes on Lo reference Lhe predlcLed levels of effecL buL falls Lo ldenLlfy whlch properLles Lhe damage classlflcaLlons apply Lo. 1hls secLlon sLaLes LhaL Lhe supplemenLal reporL concluded: of Lhe 18 hlsLorlc properLles analyzed, 1 was predlcLed Lo susLaln 'very sllghL'" effecLs, whlch conLradlcLs Lhe flgures glven S8710 norLh SLudy: urafL llndlng of LffecL asadena PerlLage CommenLs !uly 2, 2013 age 3 ln SecLlon 3.3.4.2, pg 3-273 and wlLh Lhe 8 conLrlbuLlng properLles ln Lhe asadena Avenue PlsLorlc ulsLrlcL ldenLlfled ln Lhe same supplemenLal reporL LhaL may susLaln effecLs from excavaLlon-lnduced ground seLLlemenL. 1he gross lnconslsLencles resulLlng from Lhe fallure Lo adequaLely and deflnlLlvely esLabllsh Lhe Lerms hlsLorlc resource, hlsLorlc properLy, parcel, group, and bulldlng ls negllgenL and mlsleadlng. SecLlon 3.3.4.2 LffecLs Analysls - asadena Avenue PlsLorlc ulsLrlcL 1hls under AppllcaLlon of Lhe CrlLerla of Adverse LffecL references a supplemenLal reporL LhaL ldenLlfled 8 properLles ln Lhe dlsLrlcL LhaL were predlcLed Lo susLaln very sllghL" effecLs. 1hls flgure conLradlcLs Lhe flgure glven ln SecLlon 3.3.4.1, p3-273 whlch sLaLes under Cround MovemenL LhaL only 1 hlsLorlc properLy was predlcLed Lo susLaln very sllghL" effecLs. 1hls lnconslsLency ls mlsleadlng and requlres clarlflcaLlon. 1he depLhs of Lunnel cenLerllnes sLaLed under Lhe uual-8ore ueslgn varlaLlon confllcL wlLh Lhe depLhs glven Lwo paragraphs laLer, under AppllcaLlon of Lhe CrlLerla of Adverse LffecL. 1he descrlpLlon of Lhe uual-8ore ueslgn varlaLlon should be as Lhorough as LhaL glven ln SecLlon 3.3.4.3, p3-282. SecLlon 3.3.4.3 LffecLs Analysls - Markham lace PlsLorlc ulsLrlcL under roposed lmprovemenLs, Lhe uual-8ore ueslgn varlaLlon ls descrlbed as Lwo 60fL dlameLer Lunnels and Lhe excavaLed Lunnel cenLerllnes are sLaLed as belng 121fL below 8ellefonLalne and rlse Lo 78fL aL Lhe norLhern ulsLrlcL boundary llne. lf Lhe dlameLer were 60fL and Lhe cenLerllne depLh ranges from 78-121fL, Lhe depLh of Lhe Lunnel crowns would range from only 48fL - 91fL, whlch ls very shallow glven Lhe unprecedenLed Lunnel dlameLer slze. under AppllcaLlon of Lhe CrlLerla of Adverse LffecL, Lhe Lunnel excavaLlons" should be clarlfled as cenLerllne measuremenLs. 1hls secLlon under Cround MovemenL sLaLes Lhe Lwo-sLage effecLs analysls was lnLended Lo reflecL a worsL-case scenarlo," whlch ls lncorrecL and mlsleadlng. 1hls secLlon references !acobs 2013: 3, 8 and lLs analysls of 8 parcels ln Lhe Markham lace PlsLorlc ulsLrlcL for effecLs from excavaLlon-lnduced ground seLLlemenL. Cf Lhese 8 parcels, Lhls secLlon says 3 parcels were predlcLed Lo susLaln sllghL" effecLs. 1hls number conLradlcLs Lhe number glven ln SecLlon 3.3.4.1, p3-273, whlch sLaLes under Cround MovemenL LhaL only 1 hlsLorlc properLy was predlcLed Lo susLaln sllghL" effecLs. 1hls lnconslsLency ls mlsleadlng and requlres clarlflcaLlon. 1h|s sect|on fa||s to state how "s||ght," "moderate," "moderate-severe," and "severe" effects are def|ned |n the Iacobs Assoc|ates]Cn2M nILL supp|ementa| report prepared |n 201S and repeated|y referenced |n th|s document, an om|ss|on that appears to skew the ana|ys|s. G|ven the d|screpanc|es |n |dent|f|cat|on of how many propert|es wou|d be |mpacted to what degree, we cannot agree w|th the conc|us|on that pro[ect act|v|t|es as descr|bed |n th|s sect|on wou|d not resu|t |n an adverse effect. S8710 norLh SLudy: urafL llndlng of LffecL asadena PerlLage CommenLs !uly 2, 2013 age 6 SecLlon 3.3.4.4 LffecLs Analysls - Ambassador WesL CulLural Landscape PlsLorlc ulsLrlcL 1hls secLlon falls Lo ldenLlfy Lhe ParvesL 8ock Church audlLorlum as a senslLlve recepLor, for purposes of evaluaLlng lmpacLs from consLrucLlon and operaLlonal vlbraLlons, ln addlLlon Lo road nolse. SecLlon 3.3.4.6 LffecLs Analysls - 8aymond-SummlL PlsLorlc ulsLrlcL nelLher llgure 3-31 nor 3-32 correcLly lllusLraLes Lhe boundarles of Lhe 8aymond-SummlL PlsLorlc ulsLrlcL. SecLlon 3.3.4.7 LffecLs Analysls - Cld asadena PlsLorlc ulsLrlcL 1he ClLy of asadena has ldenLlfled corrldors wlLhln Lhe clLy LhaL funcLlon as gaLeways," and Lhe lnLersecLlon of Colorado 8oulevard and asadena Avenue serves as one of Lhese lmporLanL gaLeways lnLo Lhe ClLy's world-renown Cld asadena PlsLorlc ulsLrlcL and ls an lmporLanL segmenL of Lhe naLlonally slgnlflcanL annual 8ose arade rouLe. 1he erecLlon of an 8fL sound wall as parL of Lhe uual-8ore 1unnel AlLernaLlve would lmpacL Lhe seLLlng and feellng of Lhls senslLlve locaLlon and ls unaccepLable. lL ls addlLlonally unclear why Lhls documenL falls Lo reference Lhe venLllaLlon Lowers along Colorado 8lvd., wesL of asadena Ave. proposed by CalLrans as parL of Lhe lreeway 1unnel AlLernaLlve. See 8ehablllLaLlon SLandards 9 and 10. llgure 3.33 conLradlcLs Lhe roposed lmprovemenL descrlpLlon for Lhe Slngle-8ore ueslgn varlaLlon. 1he AppllcaLlon of CrlLerla for Adverse LffecL falls Lo reference Lhe venLllaLlon Lowers LhaL have been proposed along Colorado 8lvd. as parL of Lhe lreeway 1unnel AlLernaLlve, whlch would lnLroduce a dlscordanL Lype of vlsual obsLrucLlon ouL of scale a proporLlon wlLh Lhe hlsLorlc dlsLrlcL. See 8ehablllLaLlon SLandards 9 and 10. CPA1L8 6 - CondlLlons roposed SecLlon 6.2.2.2 CondlLlons roposed - 881 AlLernaLlve / CondlLlons for 330 S.lalr Caks CondlLlons are requlred LhaL would ensure hlsLorlc sldewalk paLLerns, flnlsh LexLure, and flnlsh colors are reLalned. SecLlon 6.3 CondlLlons roposed - L81 AlLernaLlve 1hls secLlon falls Lo clarlfy lf Lhe 60fL Lunnel depLh measuremenL ls Lo Lhe Lunnel cenLerllne. 1he !acobs AssoclaLes 2013 supplemenLal reporL ldenLlfles 16 hlsLorlc properLles ln Lhe L81 AL, of whlch Lhey evaluaLed 11 (3 selecLed for secondary analysls, p3), Lhls secLlon references only 7 properLles ldenLlfled ln ChapLer 3 LhaL would susLaln effecLs as a resulL of L81 consLrucLlon." 1hls dlscrepancy needs Lo be clarlfled and correcLed. 1he gross lnconslsLencles resulLlng from Lhe fallure Lo adequaLely and deflnlLlvely esLabllsh Lhe Lerms hlsLorlc resource, hlsLorlc properLy, parcel, group, and bulldlng ls negllgenL and mlsleadlng. S8710 norLh SLudy: urafL llndlng of LffecL asadena PerlLage CommenLs !uly 2, 2013 age 7 SecLlon 6.3.3 CondlLlons roposed - 8aymond llorlsL PlsLorlc ulsLrlcL 1he dlsLance of excavaLlon from Lhe ulsLrlcL's u-shaped boundarles needs Lo be clearly sLaLed and correspond wlLh Lhose glven ln SecLlons 3.3.3.6 and SecLlon 6.3.3.2. 1he locaLlon from whlch Lhese dlsLances are measured needs Lo be esLabllshed, clearly ldenLlfled, and conslsLenL LhroughouL Lhe enLlre documenL. SecLlon 6.3.8.1 CondlLlons roposed - L81 AlLernaLlve ubllc CuLreach Why does Lhls paragraph reference 881 SLaLlon componenLs when lL ls ln Lhe L81 AlLernaLlve secLlon? no excavaLlon-lnduced ground seLLlemenL mlLlgaLlon measures are sLaLed ln Lhls secLlon, whlch ls a serlous and concernlng omlsslon. SecLlon 6.4.2 CondlLlons roposed - Cround SeLLlemenL SecLlon 3.3.4.1 sLaLes LhaL 18 hlsLorlc properLles were concluded ln a 2013 reporL Lo be lmpacLed by Lunnel borlng, whlle Lhls secLlon sLaLes 17 hlsLorlc properLles. 1hls dlscrepancy ls Lo be correcLed. lnconslsLencles resulLlng from Lhe fallure Lo adequaLely and deflnlLlvely esLabllsh Lhe Lerms hlsLorlc resource, hlsLorlc properLy, parcel, group, and bulldlng ls negllgenL and mlsleadlng and musL be correcLed. SecLlon 6.4.3 CondlLlons roposed - lreeway AlLernaLlve ro[ecL CondlLlons As proposed, the ro[ect Cond|t|ons are |nadequate to suff|c|ent|y m|t|gate the r|sks to acceptab|e |eve|s g|ven the authors' ||m|ted know|edge of the bu||d|ng c|rcumstances. SecLlon 6.4.3.1 CondlLlons roposed - ubllc CuLreach Why does Lhls paragraph reference L81 SLaLlon componenLs when lL ls ln Lhe lreeway 1unnel AlLernaLlve secLlon? CPA1L8 8 - Concluslons uue Lo Lhe numerous lnconslsLencles and errors ln Lhls drafL documenL, we cannoL supporL Lhe concluslon LhaL Lhe S8710 norLh SLudy would noL resulL ln an adverse effecL Lo hlsLorlc properLles. IACC8S ASSCCIA1LS 201S SULLMLN1AL 1LCnNICAL MLMC:otent|a| Sett|ement Lffects for n|stor|c ropert|es AuLhors assume shallow bulldlng foundaLlons due Lo llmlLed knowledge abouL bulldlng Lypes." 8asemenL consLrucLlon meLhods and depLhs varled wlldly before sLandardlzaLlon ln Lhe laLe 1920s, a clrcumsLance unlque Lo hlsLorlc properLles LhaL compromlses Lhe auLhors' assumpLlons and assoclaLed concluslons.

S8710 norLh SLudy: urafL llndlng of LffecL asadena PerlLage CommenLs !uly 2, 2013 age 8 WILSCN InkIG & ASSC SULLMLN1AL CCNS1kUC1ICN VI8kA1ICN IMAC1 ASSLSSMLN1 ICk nIS1CkIC kCLk1ILS, May 201S AnLlclpaLed vlbraLlon levels from consLrucLlon near hlsLorlc properLles locaLed wlLhln AL, supplemenLs analysls ln Croundborne nolse and vlbraLlon lmpacLs Lechnlcal sLudles (Wllson, lhrlg 2014). 1hls reporL sLudles poLenLlal for damage Lo ldenLlfled hlsLorlc properLles and bullL sLrucLures lncluded ln naLlonal 8eglsLer of PlsLorlc lace buL falls Lo address Lhose properLles LhaL are ellglble buL undeslgnaLed. lL also falls Lo ldenLlfy lLs source of hlsLorlc properLy daLa. 1he reporL conslders poLenLlal effecLs on occupanLs of Lhese bulldlngs Lemporary and no dlfferenL Lhan Lhose for slmllar bulldlngs LhaL are noL hlsLorlc wlLh slmllar occupancy. 1hls ls problemaLlc because effecLs on occupanLs ls unrelaLed Lo effecLs on hlsLorlc fabrlc of bulldlngs, Lhe bulldlngs are hlsLorlc and fraglle, noL Lhe occupanLs. 1he auLhors fall Lo explaln Lhe relevance of alluvlum soll Lype aL Lunnel porLal Lo vlbraLlon lmpacLs on hlsLorlc bulldlngs. A comparlson of Lhe Lwo Lunnel Lypes ls lrrelevanL, Lhey are Lwo dlfferenL pro[ecLs wlLh dlfferenL slze Lunnels ln dlfferenL locaLlons - any comparlson Lo LACPC1PL8 ls of mlnlmal value Lo Lhe people evaluaLlng Lhe dlfferenL lmpacLs of elLher. 1he reporL references source daLa for vlbraLlon generaLed by a Lyplcal 18M, whlch ls useless because Lhe lW1 18M ls anyLhlng buL Lyplcal aL 60fL ln dlameLer. no accepLable reason ls glven why Lhls reporL assumes Lhe depLhs of 18M Lunnels when oLher Lechnlcal reporLs glve speclflc dlsLances. 1he uowdlng formula for Lyplcal 18M" ls used Lo pro[ecL vlbraLlon and scaled by a facLor of 3. ls Lhls adequaLe? WhaL precedenL ls Lhls facLor based on? ls lL arblLrary? lurLher clarlflcaLlon ls requlred Lo accepL Lhese calculaLlons as rellable besL pracLlce. Clven Lhe poLenLlally damaglng consLrucLlon vlbraLlons predlcLed aL lalr Pope and 8aymond llorlsL PlsLorlc ulsLrlcL bulldlngs, deLalled mlLlgaLlon measures based on precedenL are mlsslng from Lhls analysls. 6.0 SLandard CondlLlons for ConsLrucLlon vlbraLlon ConLrol and MonlLorlngClven Lhe damage anLlclpaLed from vlbraLlon lmpacLs, Lhe reporL falls Lo address how Lhe pro[ecL could be 're-deslgned' Lo avold damage raLher Lhan reduce lL. 1able 1lncorrecLly ldenLlfles Clenarm 8ulldlng and LlecLrlc lounLaln as locaLed wlLhln unlncorporaLed Los Angeles CounLy, lL ls locaLed ln Lhe ClLy of asadena. S8710 norLh SLudy: urafL llndlng of LffecL asadena PerlLage CommenLs !uly 2, 2013 age 9 1able 2Should llsL Lhe CenLer 1unnel uepLh below Lhe asadena Avenue and Markham lace PlsLorlc ulsLrlcLs as a range, glven LhaL Lhe Lunnel depLh decreases as lL moves norLh. 1hese ranges should be proofed for Lhelr conslsLency wlLh Lhose glven ln SecLlons 3 and 6 of Lhe llndlng of LffecL evaluaLlon as well as Lhe urafL Ll8 documenLs. 1able 3lL ls unclear and quesLlonable why Lhe predlcLed 18M vlbraLlon Levels wlLhln norLh orLal Area for Lhe hlsLorlc properLy aL 393 S. asadena Ave. dlffer from Lhose glven for lLs hlsLorlc nelghbor aL 206-216 W. Callfornla 8lvd. ln 1able 2.

Cc:Sarah CavlL, WesL asadena 8esldenLs AssoclaLlon ChrlsLlna Morrls, naLlonal 1rusL for PlsLorlc reservaLlon Adrlan ScoLL llne, Los Angeles Conservancy AnLonlo 8ossmann, 8ossmann and Moore, LL MargareL Lln, ClLy of SouLh asadena Clalre 8ogaard, no 710 AcLlon CommlLLee vlnce 8erLonl, lannlng & CommunlLy uevelopmenL, ClLy of asadena lred uock, ueparLmenL of 1ransporLaLlon, ClLy of asadena