re: Lump Sum Distribution of my Pension Benefit

If I had to guess I'd say that the account is your vested interest in the company's profit sharing plan from your tenure with the company. They are trying to ease their administrative burden and induce you to withdraw from their plan. You do not have to as evidenced by the estimated $324/mo. payments beginning in 2039.

If you do elect to withdraw from the plan you can take the money now and pay income tax on the distribution plus an additional 10% as a penalty for early distriubtion. Or you can roll the account balance over into an IRA and defer the tax until you withdraw the money at some future date.