It requires a mountain of green to maintain the City of Roses.

In fiscal year 2016-17, the city of Portland budgeted $727.3 million for personnel services, a 3.4 percent increase from fiscal year 2015-16, though the city budget overall increased much more, 10.4 percent to $4.3 billion.

SLIDESHOW: 25 highest-paid employees of the city of Portland

And in the 2014-15 fiscal year, the most recent employee-level data the Business Journal was able to access, Portland paid 1,186 employees six-figure incomes. By now, this club is probably even bigger.

Many of those pulling in salaries north of $100K are in the Fire & Rescue Department where compensation averaged $99,135 among its 734 employees, the highest of all city agencies. The City Attorney's office and Police Department were the next highest paid, averaging $93,027 and $87,534 per employee, respectively.

With 3,350 employees, the Parks Department was the most populous but also the poorest, averaging just $11,789 per employee, due to its large contingent of seasonal part-timers. Neighborhood Involvement was next-poorest agency with its staff of 69 bringing in an average of $41,525.

Portland Police had the highest total payroll of $105.3 million, followed by the Fire Department ($73.7 million), Transportation ($48.7 million), Environmental Services ($42.8 million) and the Water Bureau ($40.3 million).

This is the first in a four-part series on highest-paid public employees. Look for stories on highest-paid college and university employees, hospital employees and state employees later this week.