OAKLAND — Last June, as the Golden State Warriors basked in their second NBA title in three years, owner Joe Lacob told an adoring crowd on the shores of Lake Merritt that his franchise would pay for the day’s festivities.

“We’d just like to say that this parade, this whole day, all the cost, every dollar is on us!” Lacob announced to a cheering crowd. “It’s our gift to the city of Oakland.”

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Warriors parade: Hundreds of thousands party in downtown Oakland But now, almost three months after the blue-and-gold confetti has been swept up and Steph Curry and Kevin Durant have hung up their sneakers for offseason vacations, the team has not paid a cent for the festivities, which added up to almost $816,000, according to the city. The city is also asking the team to pick up $244,000 in costs from the 2015 championship parade, according to city officials and an invoice obtained by the East Bay Times.

As for the Warriors, the team has questions on how the parade bill tripled in cost from an early estimate and wants to sort out the bill with the city.

As first reported by the East Bay Express, the appreciative city sent a $1 million bill to the champs on July 19, about a month after the scent of champagne had left the Warriors locker room, for the 2017 and 2015 parade costs. The due date was Aug. 18, almost a month ago, but no money has changed hands. Like the Oakland Tribune Facebook page for more conversation and news coverage from Oakland and beyond.

“We are in ongoing conversation with the Warriors; they have questions about some of these charges, which we are in the process of answering,” city spokeswoman Karen Boyd said in an email. “The Warriors have given us no reason to doubt they will honor their commitments.”

She included 48 pages of documentation detailing the labor, equipment and other costs associated with the June 15 parade and rally.

A Warriors official said both sides are still determining a final parade cost.

“There’s been no determination of what a final bill is,” team spokesman Raymond Ridder said.

The day after the parade, Ridder told the East Bay Times that the team planned to shell out $4 million to cover the entire parade tab. The bulk of those costs, Ridder said Wednesday, was for a production company, the large television screens, chairs, stages, buses and other elements of the celebration not involving government agencies.

One line item on the July bill from the city for $244,000 was parade costs for the 2015 title celebration. Lacob made no public promise for that celebration.

Boyd said 2015 parade payment discussions are ongoing with the Warriors, and were included on this year’s bill at the direction of the City Council’s 2017-19 two-year budget.

“We agreed to share the costs of the parade in 2015 and lived up to that agreement and more,” Ridder said.

However, Boyd said the city does “not have any record of other payments made to the city by the Warriors for 2015 parade-related expenses.”

In an email to this news agency, Oakland Mayor Libby Schaaf thanked the Warriors for the parade and their willingness to pay for the celebration, acknowledging the sticker shock.

“We acknowledge that the invoice we ultimately presented to the Warriors is nearly triple our pre-event estimate,” Schaaf wrote in an email. “We also acknowledge it includes standard labor costs the city would have incurred had there not been a parade that day, along with overtime and equipment rental costs. The Warriors have given us no reason to doubt they will honor their commitments.”

About two weeks before this year’s parade, the city told the Warriors it expected a $300,000 cost for hosting the parade, according to an email obtained by the Bay Area News Group. Boyd said that estimate nearly tripled because of terrorist attacks around the world that involved vehicles driving into crowds. Get top headlines in your inbox every afternoon.

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“Consequently, in preparing for the Warriors 2017 parade and rally, the city engaged in a significantly greater level of security planning and implementation, as well as increased medical response support and logistical resources to manage a projected 50 percent increase in crowd size,” Boyd said. “For all these reasons, the final cost of supporting the 2017 Warriors parade and rally was much higher than it was in 2015.”

For June’s bash, the city had 588 police officers working the event, which along with food, water and equipment for that department, totaled $354,000. The fire department used 114 personnel, and public works offered up 153 workers. The city incurred almost $30,000 in landscaping damage as well.

During the 2015 parade, only 276 police officers were needed, according to city records.

Cities often pay for some portion of championship parades, along with the teams and private donors. In 2012, the San Francisco Giants paid $1 million for their World Series parade, while the city of San Francisco chipped in $225,000.

This year’s Warriors parade was different in that the owner made a public pledge to cover the costs for a city that will lose the sizzling hot franchise in 2019 to San Francisco.

“We recognize that times are hard and this city in particular has had its share of issues over the years, and it has its share of needs,” Lacob told the crowd in June. “There’s a lot of fundamental needs, police … schools, stuff like that.”

Staff writer David DeBolt contributed to this report.