aw as see ▁river ▁bas in , ▁Dow ▁Chem ical ▁Company ▁Sed iment ▁Test ing ▁in ▁the ▁Ch ipp ew a ▁and ▁T itt ab aw as see ▁rivers , ▁University ▁of ▁Michigan ▁Ash ▁D ise ase ▁Study , ▁Mon arch ▁Lar va ▁Mon itor ing ▁Project , ▁and ▁United ▁States ▁Fish ▁and ▁Wild life ▁Service ▁L amp rey ▁Control . ▁ ▁Ren ov ation ▁The ▁C NC ▁commission ed ▁Kub ala ▁W ash at ko ▁Arch itect s ▁to ▁develop ▁a ▁master ▁plan ▁for ▁the ▁renov ation ▁and ▁expansion ▁of ▁the ▁center ▁using ▁standards ▁for ▁environment ally ▁sust ain able ▁construction ▁developed ▁by ▁the ▁United ▁States ▁Green ▁Building ▁Council . ▁The ▁Vis itor ▁Center ▁received ▁a ▁major ▁renov ation ▁in ▁ 2 0 1 0 ▁which ▁gives ▁the ▁structure ▁ 5 0 , 0 0 0   ft ². ▁The ▁new ▁Margaret ▁Ann ▁( R anny ) ▁R ie cker ▁Nature ▁Pres ch ool ▁Center ▁was ▁constructed ▁as ▁a ▁green ▁building ▁with ▁the ▁support ▁of ▁a ▁$ 1 ▁million ▁grant ▁from ▁the ▁Ger stack er ▁Foundation , ▁which ▁has ▁given ▁over ▁$ 2 ▁million ▁to ▁C NC . ▁The ▁Dow ▁Chem ical ▁Company ▁Foundation ▁also ▁don ated ▁money ▁and ▁several ▁hundred ▁thousand ▁dollars ▁of ▁building ▁products ▁toward ▁the ▁project . ▁The ▁structure ▁received ▁a ▁LE ED ▁Gold ▁Cert ification , ▁the ▁first ▁in ▁Mid land ▁and ▁only ▁the ▁e ighth ▁LE ED S ▁cert ification ▁in ▁the ▁Great ▁L akes ▁Region . ▁ ▁The ▁structure ▁has ▁a ▁capacity ▁of ▁ 8 8