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Total city/county incentive • West Jordan's Redevelopment Agency estimates that 20 years of property tax rebates — starting at 75 percent and increasing to 100 percent as Facebook builds up to six data-center buildings — would be worth $185 million. Facebook has requested that there be no cap on the incentive — meaning the actual figure could exceed projections — though the tax entity committee has asked for a cap of $250 million. Facebook has yet to agree to a cap.

The city is also negotiating a municipal-energy tax rebate that it says will be roughly $5 million, though that rebate was estimated at $52 million in an early draft presented to the county. Facebook would also receive about $5 million in total from an administration fee and municipal sales tax breaks. 

State incentive • The state has acknowledged it will offer an additional incentive that amounts to less than the proposal from the city and county. The proposed data center would also qualify for a state sales-tax break created at a special session of the Legislature last month that the county has estimated at $54 million and might qualify for a reduced rate on renewable energy under a tariff created during the general session in January.

Vote • The city's proposed incentives require a two-thirds majority from its eight-member tax entity committee, which canceled its Monday meeting amid uncertainty from the state school board.

Salt Lake County Council has committed its representative to a "no" vote, while four total votes from West Jordan's City Council and the Jordan School District are committed to vote "yes." Salt Lake County Ben McAdams has a vote and is a vocal opponent of the incentives, while Jordan Valley Water Conservancy District Treasurer Dave Martin was most recently leaning toward a "yes" on behalf of smaller taxing entities.

That leaves the tally at 5-2, and means the state school board would swing the vote. First, the board wants to evaluate how the Jordan District's tax giveaways might shift the burden to other state taxpayers through equalization funds.

The vote is now tentatively scheduled for Aug. 29.

Jobs • Estimates of the jobs created have varied, from 70 to 130 jobs at full buildout to, now, 50 for the first building and up to 300 for all six. The company has said that average wages for the jobs would be about 125 percent of local median wage, or about $50,000.

The project is also expected to create many more construction jobs during the 14-month builds of each building. Facebook had expressed to West Jordan leaders that it hoped to break ground by the end of August.

Project-area scale • The draft proposal presented by West Jordan's RDA and approved by its city council designated a 1,700-acre economic-development area — roughly 1,650 without roads — running north from Old Bingham Highway along the city's western boundary, while Facebook's imprint would be 230 acres northeast of the intersection of Old Bingham and Bacchus.

The significance of the other acreage is that this is West Jordan's last chance to establish an EDA — which allows a city to provide incentives without an forging interlocal agreement or setting aside affordable housing — due to legislation passed during this year's session.

West Jordan first tried to sway the Salt Lake County Council with a revised EDA of 1,050 acres — removing the area north of New Bingham Highway and west of Bacchus Highway — and has now pledged to reduce the acreage to the Facebook plot alone, provided it receives the county's support.

West Jordan's City Council is scheduled to formally vote Wednesday on whether to reduce the size of the proposed EDA.

Building scale • Facebook has presented plans for six buildings expected to be 550,000 square feet each. At a total of 3.3 million square feet, it would rank among the top three largest data center campuses in the world today, though the need for data — and thus, supersized data centers — is increasingly rapidly.

Water/power use • Facebook has requested a capacity of 4.8 million gallons per day. City officials say the company has told them that actual use would be much less than 1 million gallons per day, while the county argues that it would have to devote that capacity to Facebook whether it uses the water or not, keeping it from being used elsewhere.

Facebook's data center campuses in Forest City, N.C., and Prineville, Ore. — which, together, are currently smaller than Utah's would be at full buildout — combined to use 51 million gallons in all of 2015, or about 140,000 gallons per day.

In terms of power, the two locations used about 60,000 megawatt hours worth of energy in 2015, roughly equivalent to the annual use of 54,000 homes, according to numbers from the U.S. Energy Information Administration.