The Natural Resources Defense Council and several other environmental organizations (the NRDC Intervenors) intervene in the Moore Case 1 in 2003. The intervenors also file their own cross-claim, demanding the expeditious implementation of “marsh operational criteria” — operational rules that would maintain water levels in the new reservoirs high enough to stop seepage from the west out of the Everglades but not so high as to increase polluted discharges into the Everglades from the east.