(a) The Secretary is authorized to make grants to any State or local government for construction (including demolition and other site preparation activities), renovation, repair, or other improvement of local public works projects including but not limited to those public works projects of State and local governments for which Federal financial assistance is authorized under provisions of law other than this chapter. In addition the Secretary is authorized to make grants to any State or local government for the completion of plans, specifications, and estimates for local public works projects where either architectural design or preliminary engineering or related planning has already been undertaken and where additional architectural and engineering work or related planning is required to permit construction of the project under this chapter.

(b) The Federal share of any project for which a grant is made under this section shall be 100 per centum of the cost of the project.