Utilities in Texas could be required to replace decades-old steel natural gas pipelines with plastic versions to help prevent explosions.
Williams says Texas has at least 525,000 steel lines, in a replacement project that could reach $500 million.
Williams says the proposed upgrade would be the largest replacement program ever done by the three-member regulatory commission. Creating a rule to require the replacements could take months.
Utilities have been allowed to charge ratepayers for the cost of new infrastructure, plus a 10 percent profit.