Involved in the degradation of phenanthrene. Catalyzes the oxidation of cis-phenanthrene dihydrodiol (PDD) to yield phenanthrenediol. It can use either NAD or NADP as electron acceptor, however NAD is preferred to NADP. (3S,4R)-3,4-dihydrophenanthrene-3,4-diol + NAD(+) = H(+) + NADH + phenanthrene-3,4-diol Inhibited by heavy metal such as Hg(2+) and by p-chloromercuribenzoate. Optimum pH is 9. Optimum temperature is 40 degrees Celsius. Homotetramer. Belongs to the short-chain dehydrogenases/reductases (SDR) family.