Lubbock Mayor Glen Robertson stormed out during the utility board meeting on Tuesday.
Robertson said he was frustrated by a presentation from LP&L staff on feasibility of separating the billing for electricity and water.
Chairman of the LP&L Board Gail Kring said the purpose of offering two separate billings is to make it easier for customers to pay.
"And it really bothered me in Tuesday's LP&L board meeting that they are presenting information to their board with a lot of suppositions in it," Robertson said. "When I asked the staff if they had visited with anybody from the city of Lubbock the answer was no. We are just making estimations. Well I don't think that board or any board can make good decisions based on estimations."
Mayor Robertson said separate billing and reshuffling staff could cost taxpayers an additional $2-to-5 million a year.
Kring said more research on the issue is needed.
The board also voted to approve a public comment period during its meetings.
The rules are similar to City Council's a thirty minute availability at the start of the meeting.
A citizen will have three minutes to address the board and the topic has to be related to an LP&L agenda item.