Ending a six-year legal battle, the Army Corps of Engineers has agreed to pay nearly $1 million to a former top contracting official who charged that she was demoted after she objected to a $7 billion no-bid contract granted to a Halliburton subsidiary to repair oil fields in Iraq. In a settlement agreement signed this month and made final by a federal judge this week, the Army Corps of Engineers agreed to pay the former official, Bunnatine H. Greenhouse, $970,000 to cover lost wages, legal fees and compensatory damages, including for harm to her reputation and her mental health. The payment for damages is unusually large for a lawsuit by a federal employee. In early 2003, the Army, in secret and without competitive bidding, put KBR, then a subsidiary of Halliburton, in charge of restoring Iraqi oil production, in a contract potentially worth $7 billion over five years. Ms. Greenhouse, a career civil servant who was the chief contracts monitor at the Army Corps of Engineers at the time, objected that the contract was based on repair plans and cost estimates that KBR itself had been hired by the corps to prepare, and that the emergency conditions did not justify a multiyear no-bid contract. After internal clashes and threats of demotion, she went public with her concerns in 2004. Ms. Greenhouse was demoted from the Senior Executive Service and given a poor performance rating, prompting her to bring the lawsuit. As part of the settlement, Ms. Greenhouse, 67, formally retired this week with full benefits.