HOUSTON (AP) — Thousands of bricks laid by ex-slaves at Freedmen's Town in Houston are being returned to the historic spot after removal in 2016 for storm drain work.

Houston Mayor Sylvester Turner says city crews on Wednesday began re-installation of road bricks in the neighborhood that in the 1860s became home to former slaves.

Turner says the bricks, laid on the final day of Black History Month, were removed in November 2016, then cleaned and stored. Preservationists raised concerns about possible damage to the more than 3,600 bricks.

Re-installation was scheduled to be done in December, but Hurricane Harvey and other weather-related issues delayed the work. Harvey on Aug. 25 hit South Texas, leading to storms and flooding that inundated parts of Houston.

Turner says an archaeologist will help oversee the re-installation.