It is part of the storm water drainage system on the site of the new drinking water storage tank that is under construction by the MWRA.
(It; is; part of the storm water drainage system on the site of the new drinking water storage tank) (the new drinking water storage tank; is; under construction by the MWRA)
It the new drinking water storage tank
is is
part of the storm water drainage system on the site of the new drinking water storage tank
under construction by the MWRA