The proceeds from President Trump's first quarter salary will go towards preservation projects at a Civil War battlefield, according to the White House.

In April, Trump said his $78,333 paycheck would be donated to the National Park Service. Interior Secretary Ryan Zinke announced today the money will go towards two restoration projects at Antietam National Battlefield in Maryland.

The donation is bolstered by $22,000 from an anonymous donor and another $263,545 from the Civil War Trust, the National Park Foundation and the Save Historic Antietam Foundation.

"Visiting the hallowed ground the day after Independence Day is incredibly moving and it underscores the importance of why we must preserve these historic grounds," Zinke said. "The President's donation will allow generations of Americans to learn about our history and heritage on this sacred site."

Trump's donation accounts for his after-tax income from between Jan. 20 and the end of March.

Then-candidate Trump pledged during the campaign to not accept a salary if he was elected. Trump, according to the latest financial figures from Forbes, is worth about $3.5 billion.

The president earns $400,000 a year, paid in monthly installments. Each presidential paycheck is about $33,333, a combination of salary and a $50,000 expense account.

The Antietam project includes replacement of Antietam's Newcomer House and repairs of more than 5,000 feet of deteriorating fencing in areas where some of the most intense fighting of the 1862 battle occurred. More than 22,000 Union and Confederate soldiers were killed in the battle, which came just days before President Abraham Lincoln issued the Emancipation Proclamation.

Zinke also announced an additional $7l.2 million in grant funding for other projects at historic battlefields. The grant projects are located at 19 battlefields threatened with damage or destruction by urban and suburban development in Arkansas, Maryland, Mississippi, New York, Pennsylvania, South Carolina, Tennessee, Virginia, and West Virginia.