UNITE D STATE S DEPARTMEN T O FTRANSPORTATIO N FEDERA L AVIATIO N ADMINISTRATIO N

WASHINGTON , D C RDM , LLC , Complainant , TE D STEVEN S ANCHORAG E INTERNATIONA L AIRPORT ,

Respondent . - 1 1 ' ) — 1

Docke t No . 16-09-1 4 AFFIDAVI T O FJOH N E . JOHANSEN . P.E . STAT E OFALASK A ) ) ss . THIR D JUDICIA L DISTRIC T )

Joh n E . Johanse n bein g first dul y sworn , depose s an dsays : 1 . I aman enginee r

for Stat e o f Alaska , Departmen t

o f Transportatio n an dPubli c Facilitie s an damth e Manage r o f Engineering , Plannin g an dEnvironmenta l o f th e Te dSteve n Anchorag e Internationa l Airport . I amalicense db y th e State o f Alask aa s aProfessiona l Engineer .

2 . Th e dewaterin g pla n submitte db y AGLA D Postmark , LLC , ("AGLAD" ) for

abuildin g permi t

showe dnin e dewaterin g trenche s radiatin g firoman d drainin g t o acentra l collectio n point . Fro mthi s collectio n poin t th e wate r wa s t o b e pumpe dthroug h adischarg e hos e t o ane w 36 " culvert t o b e installe dunde r

th e Nort h Tu g Road . Th e foregoin g i s eviden t o n th e attache dhighlighte dcop y o f an EEI S pla n

AN C - 005 0 Affidavi t of Joh n E . Johansen

r Page 1 o f 4 RDM , LL C v.AN C Docke t No . 16-09-1 4shee t

C 1.0 , date d6-10-06 , captione d"SIT E DEWATERIN G PLAN " an dpreviousl y submitte di n th e abov e matte r a s ANC-AGLAD-0217 . 3 . A s indicate di n adetai l locate di n th e uppe r lef t quadran t o f th e pla n sheet , th e dewaterin g trenche s wer e designe dt o b e du g t o th e botto mo f th e peat , whic h I beliv e t o b e approximatel y 1 5 t o 2 0 fee t dee p i n thi s th e area . Th e trenche s wer e t o b e 5'wid e o n th e botto man dhav e 2: 1 sid e slopes . Wit h tha t depth o f pea t an d thos e slopes , th e complete dtrenche s woul db e 65 ' t o 85 ' wid e at th e surface . Eve n i f onl y 1 0 fee t

deep , th e trenche s woul dstil l b e 4 5 feet wide . 4 . M y understandin g o f th e reaso n fo

r dewaterin g th e sit e wa s t o enabl e th e pea t

t o b e remove dan dreplace dwit h silty-san dan dsandy-sil t mine dfro

m airport property north o f

th e tenant s site . Becaus e silty-san dan dsandy-sil t canno t b e compacte dbelo w water , I understoo dtha t dewaterin g o f

th e excavatio n woul db e necessary t o plac e an dcompac t thi s silty-san dan dsandy-silt . I t i s m y understandin g thi s i s wh y th e trenche s i n th e dewaterin g pla n wer e designe dt o b e excavate dt o th e botto mo f th e peat , enablin g th e entir e depth o f th e excavatio n t o b e dewatered . A not e o n th e dewaterin g plan , "TH E CONTRACTO RSHALL ENSUR E THA T FIL L CAN B E PLACE D I N TH E DRY" , support s th e abov e state dunderstanding .

5 . Dewaterin g (pumping ) woul dhav e been require dcontinuousl y durin g th e pea t

excavatio n an dbackfil l wit h silty-san dan dsandy-silt , a s onc e th e pump wa s shu t off , th e excavatio n an dtrenche s woul dhav e filledbac k u p with wate r

over time . Althoug h I d o no t

kno w t o wha t

exten t th e trenche s may hav e bee n pumpe dwhe n the y wer e du g i n th e summe r o f 2008 , dewaterin g clearl y wa s no t completed , an dwoul d Affidavi t o f Joh n E . Johansen

r ANC - 005 1 Page 2 o f 4 RDM , LL C v.AN C Docke t No . 16-09-1 4b e complete onl y upo n completio n o f th e dewaterin g plan : trenchin g t o th e botto mo f th e pea t laye r an dpumpin g fro mth e trenc h botto munti l dry . I t appear s clea

r t o m e that ha s neve r occurred . 6 . Th e dewaterin g trenche s actuall y du g ar e les s tha n V 2 th e numbe r an dles s tha n V

2 th e tota l combine dlength o f th e nin e show n i n th e dewaterin g plan . The y als o appear

t o b e onl y afe w fee t

deep , a s oppose dt o 10 ' t o 20 ' deep , an donl y severa l fee t

wid e a t th e surfac e a s oppose dt o 45 ' t o 85 ' wide . Th e side s o f th e trenche s hav e sloughe dsinc e bein g excavated . I t als o doe s no t

appear tha t an y centralize d dewaterin g sump wa s installed , no r doe s i t appear th e culvert

wa s eve r installe dunde r th e tu g roa da s planned . Althoug h Not e 1 o n Shee t C 1. 0 indicate s tha t

th e contracto r may vary th e configuratio n o f th e trenches , i t

i s quit e clear

tha t th e existin g trenchin g b y AGLAD' s contractor , see n a s dark line s mostl y o n Lo t

2 B o n previously-provide d ANC-000 2 an dappearin g a s full o f wate r i n Octobe r

200 9 o n ANC-00 8 an dANC-009 , woul dno t

serv e th e purpos e o f

enablin g th e sit e t o b e dewatere ddow n t o th e botto mo f th e pea t a s i s clearl y th e intentio n o f AGLAD' s dewaterin g pla n submitte db y th e approve db y th e airport . Thos e photograph s als o sho w tha t th e sit e ha s no t

bee n noticeabl y dewatered . STAT E O FALASK A NOTAR Y PUBLI C Jeanett e A . Lucke y M y Commissio

n Expire s Wit

h Offic e 't^ . 

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J 6 ^ E . Johansen ) ^ ^ «;>j,.» ^

Affidavi t o f Joh n E . Johansen r RDM , LL C v.AN C ANC-005 2 Pag e 3 of 4 Docke t No . 16-09-1 4SUBSCRIBE D AN D SWOR N T O befor

e m e thi s 3 ^ da

y of December, 2009 , a t Anchorage , Alaska . 

# r STAT E O FALASKA^y^ . NOTAR Y PUBLI C ^ Jeanett e A . Lucke y M y Commissio

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