2018 16 USC 756 – Investigations, surveys, and experiments; construction and installation of conservation devices, etc.

2010 16 USC 756 – Investigations, surveys, and experiments; construction and installation of conservation devices, etc.

2013 16 USC 756 – Investigations, surveys, and experiments; construction and installation of conservation devices, etc.

2012 16 USC 756 – Investigations, surveys, and experiments; construction and installation of conservation devices, etc.

2014 16 USC 756 – Investigations, surveys, and experiments; construction and installation of conservation devices, etc.

2015 16 USC 756 – Investigations, surveys, and experiments; construction and installation of conservation devices, etc.

2017 16 USC 756 – Investigations, surveys, and experiments; construction and installation of conservation devices, etc.