Superior Court of California, County of Contra Costa. Three agencies (Empower, Contra Costa County Employees' Retirement Association, and the Social Security Administration) partnered to educate members.The Contra Costa County Deferred Compensation Plan is a governmental. The Contra Costa Water District (CCWD) is pleased to present you with our Retirement Handbook. Your retirement is an important event. Submit your IRS Form W-4P, Withholding Certificate for Periodic Pension or Annuity Payments, and. Failure to meet these deadlines results in the project being deemed approved. 29 Denver Schools. 88.3. Employee has served. The benefit formula schedule is set forth in the Retirement Plan Trust.