20090210 DRAFT Tech Memo 012510 (2)F i
LANDRt!
ASS(X'!Ai tti
TO'. -Freer Lougheed. P.G.. (gimme U islorriSV:;ttC .uid Associates Gnginecring Lae- Y.S.
PROW Grin V/eb 7. L.He_ Chris Stu'hz
DA9'8'. lanuars 25. 20 t0
RE: R@SUCPS 6Y MOUNO}N f, AN:tLYSLS
YGLV( iL41NlHft TRANSPORTATION CLNTL~R
5'Et~i, W nstvNCroN
IN'r~onaca~torv
'Phis Ceciuticel memorandum pi escatc the resulT3 oP n nromtding analysis conducted for the
proposed Yetm Rshder 't7ansportntion Center prgject (site) IocaCad northeast of thu uuerseceion oC AiW
S[erens Acem~e Emd Railroad StreG ht Yelm_ Washntgion 9ffi(i7 (Figure I). The site parcel msmbers arc
7271931u I00_ 227E)3IU;160 acrd 2271 )"tlu?oU. The coral area of ilia parcel ~s a.8a net`s. The
detelopment xtil include sionnvrater fx ili8es. uftfitt0a builcfings_ parking lets. and open space. The
nn[icipated storm realer nmofC firm the impervious areas will be directed into an infiLb'ation galler}~
tacated near the norflncest proixny brnurdarp. The monudsng IInatysis visas perfantted to estunate die
potertfal impacts to groundixater Levels ai the propcrp~ 6owtdarics_
77tc smmdard that is ¢tppiicri io Ute Thurion Coumts~ Cridrai Areas Ordinance thr the Salmon
Grcl: Basin and Gdter }i[g6 Groundwater ~IeaS (City of Tunt~.vaecr website 200?) ices used es die basis
for esfimatfng monndimg impacts. The conecp( is to cvah~atc gromndxater Le~~ei chaztncs at die pr<sxrtr
bowtdarv and at s'Ite- A chnnae of"less' than OS f1 is cons(dered to be ro (mpaet. In other ttords. impacts'
a2 rounded to thr, naar~..t Poor To m;duate the imi>aMS in dre Snhnma Creek basin (located south oC
Tumwatec Washimgton). a series isf {'oun[c guide&nes r+ore deraloput and presented iu else f3round~r~zter
Momadnay drralvriv G`zudulinec Menruranduni C~c menmmndum) (Pacific Groundwater Group 2000).
'the memoranchmt guidelYtes irate agp6ed co Clm mseed use s2r x~ith a number of modiiieat3om5 io adapt
the anal}sis to the 1'elm area and to simpti$° the amalysiu_ These modiC~catiats am swnmtuocd belme'.
the nremorandurn proposes using die FISPF modet and pcsfomting ma mwlys[s u2' tong-teen
mondtly iechargc (ur water years 1947, t94fi surd 1999 bawd mt relationslugs trod
Information in tha Salmon Creek basin. For this sty anaksis. nuwff tsar estinmtc<i fn~m else
ranttall hyesogtaptt es¢ubluhrd far Thurston CmmR~ iu dre Dntlnagc Destgrr and Erasion
Cnnnrol Manual fir Thuveton County (1494). ibis approach used a 7-4 hr lU0-year des[gn
storm eeenl ro Loak ffi ustei lecci [ntpeers rather than Ion_rteam scasottai impacts proposed in
rite memormtdum. ifus Bras a simplifvittg assrnpflan that is considered consen~atis~e in that
Imens~e short-teen stone avmnv shbuid prodnCC ~elatircit~ higher peaks thm average monthl}~
550 Parik,-,,Avenue, SL. SiS Tacoma. WA 98402 (253) Fi26-2493 fax (ia3) 92C+-?53; wwmfandauircmm
.-~ Ctri9. ~ a acnlt. the mm~crlcal moeiek . ac desSgned to franc t-fir time steps rather than I-
month time stel)s.
CESlibratzon sczu done qua38nUr Lh' 0ased ~ n h st prUfzssi-r~ril judgeuent vtwc er<r cnshe wat^r
Ierel data mu n=ni(ablc Cut cal(Utation.
e LY3(YOnan5ptYT1li0n Wd5 nOI [Fl~c£n nll0 aCe6nn(. ~luS ¢ 1, a COnF.RR aUVe 'd(1jt15tnte(tt (O
siwpltfr nade3 setup.
a Ons(te water Irt els were not correlated to Cower referer ce r<eII lots since this data does not
£YtSl Sli ChC yCjYh Ri'Cfi.
a AtiuSlu prupemcs rucr2 bass on the Yelm specifre Ewlpgv ftzpon it nckison l49A). ,4
h,dean(iC trradacurtla° raitx: c>f $,£;;M3 fLdas~ n'as u>°t7. Thin raiue 3s fhe Imz {censcrrauee7
eud of th2 rattge oI" vataes gaueat?d ~ Frtnz C[rotazhuttfr Ita-,ciinr 1ruNPiz,cr; ~r1afC506
1498)_ In the abscnue oi'srSe ,pccitic data. the memorandmn soggesPS ns~ng rmWes irwn tha
x szronal US{iS "tfia+rs'tnn Counir tucclet (S3ros[ ek aI. !4997.
h'fot'3eL StiFUi'
(n order ¢v gnanttfy the potentfat impacts tfom dre propos<d ra3scd rrsc area on Ra-<rwtdwatzr
lertls. v nrarndSng mr<tlx ets ua. axrdocfed using a numerical Erntmdrs~atCr tnnrkl in simuisie the
gmundtcatu conditions 6aneath the site. Tfie numerical model was der eloped using tiroundrs~ater Vistas
gaplncal user tnterfacr, to the t, S. Gcolur;~.._al Sun~CV (t•SC5) M{}pf t (7W code lf`SI 2U04'. HNrbnuy,h et
al. ?tI00), thr code inns snared using tins preconrtitioned conju~atc g~admnt Z s'oket pacLfl[,e {H[- 199t7i.
The moQe( wag set up in gcnemL seaxdancc with the mounding mrah vas proc'cdurrs csWblished by
Tturrslon Coanty in the rrtea+orar+dtmt.
7"he moie7 azts set up w9th u ce11 vtRd v7e of I G x t0 ft. lire model bmmdac r ~s trerv esPalilisfxd
at n distance of about SO times the ~nsans(oers v( thn site. per the tzsc~rotandum Palm Crctik runs
adlacen[ 1o the pro[riri}' and tau nxx{cl~d rs a r;?t+statx hear! bonndvri. The southeast and nnrtltw es5
tzaaAcl botmdat As rem'c s.incd as g:°nerai head bosurAat tes ra4tlr h: ad rnluee of 334 b sn8 32A ft.
respeC[is~cig. Fhe mOt[ci bf>nnitades aec shmra on Pinu,e Z.
The marlel eeas constmuted as a single laz~ec with a urzitotm lhts6 Hess of :? ft The llrieknv' of
the Diode! is as dc-nved br dre o0snnmirun of rreii logy m !fie siR^ oicinH} zntd dnrn ptescatcri in Erieks'em
(13ita)_ `(hc sa[uratrzi ponian oL die mode( rr;presc~nts rccessionai outwash deposits tint are mapped as
tfic surfact depm(t nr [hr, Brea pJrost et a7 Isr99). '1`hc teress~aral deposit [s charimten>ed as intennitteni
in th aaa Dud cuuslsts of loam sand ;md gtarel IF.t lckson 179R). I he mccseiaml ouncnsh depovlt is
undeda6r bs 61I deposit! tdent[fie6 br d:Sllcra as Berdpan. Tins till t of esCnts a no 17mr bomrdarr and ,c
the boifom elevation ol'tlte mgdol Jrfd. NvdrauLc anrduc !(rite ai tIr uassional d:.poslt Is reported to
ranee bctecen 4 h'u(1 f'udac and G6.000 ft'dar (hnckwn (99Si. T(e ~a1uc ~1 &IJG tl~dai was selected u7
provide at cuuscrrative Oilgh) estimate al groundu~aaer moimd9ng. Tha specoic gield was sCi al OJ i. The
recharge sourco m the ruessional rntlwash acryi i fey fs p~ ~mm'ilp prec.(prtat~on lfirickson 1998)_
~2ECHARGE
To sim male Ntc elTects of pre- and post-d~~elopmen! crond71ions. a mcharga Reld for each
condition n'as established. the wchar~e fields rvero dctived Prom the 24-hr design storm Itpeloyraphs
preseatrd in rile Dneina~e Deli ox mra' 6rnsion Conlr»l A~Imnes! fm' 7&vrsrorr tbarrlt {1994). The
recharge livid for itw pr-Acre toped c4mGU<m n~as' derlead from a st~audard precipltntrnn e~~em designed Iv
~m oleic a ?4-h r, i0(>_f-ear slonn i'or Thurstotr ~.amllt (G.71 inches in 24 hears)- The iainfatl rust wai
used as the rerha~ge Field applied to the m<>deh basin storage teas no[ tztken into account Iv be
consersNtire. fl was esswucd that !00 percent nCthe redtsrye applred «~ the si4e would infiltrate under
original sire conditions.
ilw posHleveloped reclrsrge Geld Por the site zeaa established br taknrg Chc recharge that aims
appl'u^d eo the prglecl site an<! intittrfiUng that water as sinndated runatT into the infiltrnbon gallen~ reiih a
base m'eo of 2 240 fC. The correlation of nmo9'f timinn, and grecipitntion rates was made for impervious
surPaws by Erntreho and Eoodr (2004). T'he hnpervintu surfaces` and infikratien gaiien' are shue~n on
Figure 3. "11te recharge run-es are shown on Figure 1 and the data is shoiea in Tsbie I.
P/Pai3HL EBH{`U'f7€JM1 AR`[5 C~§LIHStATit)N
Fl srex:de-state model was used !o set up initial conditions for the transient modes. The s~eadv-
stato modal wars rim using t recharge me of 21 inches per' yen', whidt is equhalent [o Odll}iri ftJdati
(Dross e! a(. 1999). iYre steady-s1aFJ hesdc were then nsect ai, the Initial heads in the lrnns`Sent run. These
heads are shaven on Figure 2. Tire model was then mn under n inansient condition and qualitatii'eIe
calibrated to Cvaler level chsurge. Reported water level chnng~ in the r~essional owwaxh aquifer are
reported [o be appmximatelp 9 it Rom Maicdt I99G to Januan' l9'37 (scrurona change) (lirickson 1998).
T'hie seasonal e°ett'r levx,l change was a.'Cd as :r basis For water Iovrl ~ h,3nor»-, pot the 74-hoax frannent
sintulali(en h e. water level changes should he Ies Bran 4 ft for a 24-Irour event)- The dene~ed ?4-hose.
100-year join event was simulated tvidt 24 mess pc~iods n'itlt 7 time step R~r cac9t stress period. Two
addifiwral ?d-Is sn'ss periods were run after' the storm crvnF (o eialuate Ate dissipation ~nle of tire
In6ln'ated s+ater. The ahsurszd cater Ies CI change Br the model a1 established abscrvation wells seas about
Li PI (bra 2=t-hour eren[. 'Ph[s is con¢Idared In be rcasonnble (of a 24aiout ecCnt 1~hN Iocilions' of the
. , ~ .. r ~ '
s
obsenalien Writs arc shown un Plgurc >. Sfnnilated rinrcr balance nn ors recrc less than I pcrecnt (per
the memorandum) For aiI model sinudaflmrs.
1i90i}6L F2 GSU CTS
To sumds2 44e eCfeots of dervioped site conditions. ooh' the recharge quanmp and distr76u1iun
seem dta~~ed orcr .fie site. lb execute lltis, the first simulation vzas dre original 29-hour smnn eceN
scith die rocharge iicld applied ccenl}' Deer the Cntirc erode! {Yre-Bevcioprd Siic Condition). "(he
recharge Field ~+as dren adjusted to shnulaie the appmtimatc m&sd use prptw4 site pion (Developed Site
Conditiar}. The nvo impervious arcs tctaBng 357 acres shown on higurc 3 wem simulated os receiving
no recharge. Runoff' goocwtod Gom dre unpen4ous areas was recharged directly drrough dre Brfiitration
gallery. Recharge simulation tar the remaining pmt-ions arws nzrs dr ° swore es in the 24-hour stimn eeent
for the ('i f)areloped Srie CeSndiliun. the i ~cirarLe late, npplie'tl t. the ini'6Untion gsdeq~ are shown on
F'it_!me # and in'Cabte I.
The simulated impacts mere tracked using a se! of ohset~:~tion teens cunbiisfiu7 at rations
distances fiem the infiitratlmt wailers. Obsenanon x'etl. OW-I, taws located reithin tfie eeneer of the
infiltrntinn gallen-. OW-2 aas located at the nonh~cesl propene bounclun' or about t0 fc Prom the
inPdh'a(ion wallen-: and OR~-3 tv'an Totaled I00 ft Lom nc~ infilarntiou ga9etT. Ob,crcation well OR'-t
trbs locai°.d Heart the rretiands in the eastern portloa of the seta Io asstise potenfisl impacU to the wetlands.
The rasultnrggrouadontum~und underneath the inliltmdon gatlen'vHS rclFliicCl}' minor and I'hn
rchich is indicat(ce o! the highh~ permeable recessional ounras0. 'ih 'f"fecttec drnnwe in ~.~oundwacer
(et'els bcnveen dre Pre- and Past-E)evehtped Site Condrzmtns real' Q 07 R fn OW-7. fLfiO ti in OW-2. and
41i1 4 in OA'-3. 1vta uffecuvc ~salnr teec( change was observed near the tcetionds (OW-J). Observation
tce(I hydrographs (OW-i, OW-2. and OW-3) mrd Lupnct5 for pre-der~elopa[I and pnstdecuioptd
cardiuon sinndalions are proeide<3 in 9ppendix A.
Accordion to the standards set froth [n the memorandum. the current location of the ndltration
e,aliet_r does impact the groundwater of nc~ properlp bouu6an' G.c_ .~,rea2r than U i ft). As such. trC
rteommend locat(ng the iniilU~ation galiar ac iwst (0 ft from the not thmest pmperi}~ boundaq. Based on
modeling. nn inRkrminn Inciiitr located at Ieost (>G ft ars~ati Gom the property boundan- trill result in an
i mpact of Tess Than 0 5 Ct.
F1S6: f}F ~H~Pi7S T~ECHNIE 41. R'~ @M6RAN DUM
Lvxfau Associatev has preiiarcd this hy¢Iroecobgic icchnical nmmorandum for the csd usive uac
of Jerrnnc U Ylorrissctt~ and .lsociates En ginterntg (nc P. S, and its design consulmnls for species
,,,,z~n ~,.., u~ ~~. ~o~
appHCanon to the des~~r of (he proposv<i Yehn Rain icr Transpotterion Cen~cr p~.x~ect. Uce of this
techrricaJ memoizurAum lrt Mhem or Ibr ano[fier pmieu n nt iIw u5cr 4 wte nsk. Within the tuui[ations oC
scope. sriicdule. and budget. onr senicos hey-e bCen conducted in ecwrdmice ndth genemilc nccepied
pmaiccs of the hgdrogcologic pmfessionc na otlrer tcarrant}°. express or inrplied_ is made a, m the
proCcss[orral adricr included in tlru t~rhniwl mcmocanduni.
T7ro conclusions cautained in dils technSOal aremrn'audum tyre based Pty pots upon data obtah~cxi
Crom other grounda~utcr studies in the vicinitg of tlu; project site. 9'hcre mti}, be game venation in
su bsurPacc soil and groond~suCer tonditimrs at [fie project sitc_ and the nature and ezient oi' Oic Z~prietrons
mae not become ecidem wail wnsuuaioa.
14c appre<iaez Ore opporumiCy eo pmr(dc irrdogeotoglc yen ices on this project. [P~ou hm'e anc
yrresfions or eummenls rcgsrdnr~ the vrfotmaoon oonrrined in th9s tachnical uinrromudum. or iP me may
be oC ftuther ser<iw. please call
92E1"FRE'NCF',S
Brattebo N.O. and D.8_ Noo0r. 201)3. LmE~-lenn .tiYwrm roar Qarmrin~ rmd Ot+zelm t'erjoriirm~ce of
Permenbfe Pu~ement SLuenvc. Or prays (as of July 1,?003): WaterR 4ourc~s, Hisc~iar Pros.
Druiaage Design and Emsinn Control Ntamml for Thu~~ston County. l99d.
h. ~ n ._S na r i i n r.l ,i >_ dr d ~,~ '. Acecssed Jane 5.2008.
Dross H. VV D Y7. EI}~, mid W.E. Lum, II 1994_ C ancrpnxa( Ada~te/ and M:nrerrcal titmulnrinn of tlae
Graur~d-N at a~ P?nu~ Sio'rem irr the Una ornnhdnted Jetfinre»lr of 7tnmrlnn ('rnmn~. !p¢shingrar2. G.S.
GCOh~gical Survey Wurcr-2esowces Inrestign6ons Repon 99-4IE5.
Erid<son, D. 199R. Yelrn Cirzumrtu a¢v Rnveli7e Smnpllna. !4 ater E3oAg No. WA-I I~d-IOGW.
Washington State 6eponmem of Fcolo};r Publicstson No. }R-20l. Jamien-.
i'SL 2004 [,n%d<~ m tfr-a6 GmundrrM ~ ! ntac. Vers<,n 3 E]n-iro-nmental Smuilatiars toe.
Narbaugh A.W._ RE. F3antn. ~VISL HiIL and M. G. McDonald >000. Mod(7ou 7npD: 1ha (1.,S.
C'eotogico] Surrav Modular troimd-Wrnri Model t ser Guide to ,Yfo~Adm~imnnn ConcapLC and rha~
(rrom~rd-4i au fYo:r Prorraes. US. Cwloglcal Sun,eti Open Pite Itcpoi! 00-92.
Hilt. M.C_ 1990_ YreC nrrdiYoned Con}rtgate.{]radiant ? (PCQ„): A Compeer Yrograrn j<rr Sotring
Geormd-Nrnter F)rnv Eyreanone. Repo¢90-d(r-:8. Dem~u. Colorado.
Pacific Gromr[hkate~' Gronp_ 2060. Nfcrnurmdam- Grrnmde~ntrr Mmnufing Annh~.vis Grndr llrce,c.
Octo6er_
't`mu~cutar. Cite' oC, srob5ite_ 2001 Ordrnnnce No. 0300~OU3 ~„ -,~, +n~ ,a tar n;.. r , r ;:
~ 1 F , i ~~, ~ ri I Accessad April S3. 2008.
_.s:,r F-.. ,~ ,....., _.x.
A1'i ;SL1i M111?ti'3S
Figure I - Vicinin~ Mnp
Figure 2 -Slit Matp muI MoAel Bouudmics
Figwc 3 - P%jcct Sitc Pian
FSgure 3 -Generated Rechtuge Rales fa' Pre-0eeei~ped and Developed Site CondiUaSs
Table 1 - Summan' of Pie-Developed and Der+;lope(1 Rrchnrge Cietcs
Appends A - H}dro~aghs fa'Pre-Developed mid beyeloped Condifian Sinudatimu
t~v6Yti!
c os i
Maas
~ ~d~e saU,~a Esc>eos
Yelm Rainier
[,ANDnU Trensponafion Center
ASSOCiATLS Ye~~n, Washington
a ~ ~x Y-
to e_on ~
~ a
1
'P Yeim
'~ ti~1~s'°fi i~ ~t~+€t4
Figure
Vicinity Map 9
Lend
~„~ xppra,nnzre sire oou~,aa~r
^°°° GeneYei fiead 3oantl2ry
Cons~ant Hasa 3ouna~ary
-.-~...... Cenmw
data SpCtw: Bin4)~fs
T~ans~orta aniniar
LANUAU ~ n CenPes
ASSUCIAI FS Yeim, Washington
Note
i a3n; anu wnrce apmducHos or mts comr
erlptnar may roaurn n-> ex~,mveoons ana
ieao ro mw«e~ ~nrEwrc~e n.
U :~.OJD f.OCa
wala in roeti
Ft~re
Bite Map and Model boundaries
Groundwater Mounding_
o'~N-i ~`) Modeiea Obsarvatlon YVe~~
9C3EA. {.EGELdt?
~: ~
arvr. s...u ar„
~ ~
~
C~ ' a ~ n.. t s:~c
r rSYi
~e
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r.
u~nc~si
irvri!w
J LEGEND
® u..,uco ~ amax v.,,~o~.r
~
k(a are rae .n.w.,.a
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m ortU.
oa ..wnwe~~:~.
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_~
ai... ~ v_*i ~wano~
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w.. ~>xm -m- ~-+~+a~+w riry.arr
s .~.~r ~... ua
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a
urvrnw e~ex
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\\~
o rah oo Yeltn Rainier Figure
_ _, rransponanon center Prajsct Site Plan
5 ae n ~a~ Yelm, 1Nashington
-i~~rt~ uii>1 ~' up m;nr
~.,.
s
~
~,
a I
az v
~ 9
m ~ ~ ~ ~
ra m
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i0 N
Tame ~hr}
CANDACJ
ASSOCIATES
Yelm Rainier GetieP2ted $22Ch~Yge Rates t4P Pfe° Figure
Transpartetion Certer C}eVetotJea afld C}eV214~}ed site l~.
Yelm, Washington ~t7ndi41Ori5
TABLE 7 Pasa ~ er r
SUMMARY QF PRE-DEVELOPED AND DEVELOPED RECHARGE RATES
YELM TRANSPORTATION CENTER
Tuna {floor! Gre-0eveloped 51[e Recharge Rate
(FVboue) Basin 1 Recharge Rate
(Podgy)
i C_182 SZ98
3 G.2W t98r
3 Q282 ~%4p '.
..
4 G.3.II
. .3381
~ C.aS& _.. .0353
.
~ 0.I3o _.. 1~4>
2
;.
1.'.1'0
.
X5.55
3 .
C910
_.. A3 ~I
ID C.92C _8435
0]W 62
;. ..
re u:~
_ as n
is
,. .
oa7s
.. . 4s ~
IS x,:56 5fi IB
iG OA2ti
... 0134
~~ 0.353 3a 3G
ib 0.3G2
_ 2936
.
~~ U.3P 2534
~
25 03G2 2934
22 03C3 ~93a ''.
13 U_8G 2716
24 (}.24-t 13 5 '.
- nsr ai; '. ~n S.3 $'~ 9
APPENDIX A
F3~°r fir ~®®v~lc! c~
[~v~l r~iti~ra ~rs~lir~
-=-=r I<~ lent : erne. ao ^-r~ _ _. en__
s99V v ~,.,~~
a>5 SJ _. _.. 13U
t°d i6 _. _.. _... __ __ _ 3oG
~~
ao-d-p-»tm-~.u.,
_23 SO _ -ao .no-°P-:-.as a;d... ,. .. _. ~aU
g
E
S ~'s " +L
~ ,. - Rx ,.. *S
~..~
',,
~
,. 4'.M. LL
Te-r0 _ _... - _... ;. . c0
;~S a'1 ~.._ - - n.MT
O.c ~~ ..v _.~ 30 _~ 30
Elapsed Tome {dayzj
Yelm Rainier Figure
LAivi~3i~U Transportation Center (}fit-'j F9ydYagf3ph !i
Y
AS5f5CIATES Yelm, Washington c
P'r9eve ~~^2 nt ~~+ .. ~ oDm D:ffe .4Edt1
~ le ~. ~,%3tR 5&.k
fr-a~@ e3 ,C ~. il...
I
~ a
5 ¢
v ..-, ,. ~
~ ~ ~.
ei~n~d rime {aw>i
k 4."-JO.tEf
A5SOt InT(M1S
Yeltn Rainier
Transportation Center
Yelri, Nlashington
5
a. - ~ P3
FJJ~~igure
..............._
z3•~, _
~~ar~~ ~~~~m~~~
~,~ , __ ~ ,~p~,xtia.
a-~,
~~
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~z
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~ ~~n
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>y , _
3~0 ~0 ..... ...... __
tG LS
EtaFUd Tmr hixt'+;
Yelm Rainier
LANDAU 7ranb`pmletfon Geater
ASSfJCIATGS Yelm, Washington
i p 00
_.. ZS i0
Figure
C3W-3 Fiydragraph ~.~