The department shall prepare and submit to the secretary, state plans which shall include the programs for construction of facilities developed under this subchapter and which shall provide for the establishment, administration and operation of the construction activities in accordance with the requirements of the federal act and regulations under the federal act. The department shall from time to time, but not less often than annually, review the state plans and submit to the secretary any modifications of the state plans which it considers necessary and may submit to the secretary such modifications of the state plan not inconsistent with the requirements of the federal act, as it deems advisable.