Surface and Subsurface Storm Drainage Structures and Facilities

ARTICLE E. SURFACE AND SUBSURFACE STORM DRAINAGE STRUCTURES AND FACILITIES.

• 1. Earthwork and Drainage. All necessary surface and subsurface drainage structures and facilities shall conform to the "Standard Specifications for Road and Bridge Construction", published by RIDOT, exclusive of any items therein covering methods of measurement, basis of payment.

• 2. Manholes. Manholes shall be located on all storm sewer trunk lines as follows:

• • a. At maximum distances of 300' (three hundred feet) for lines 30 (thirty inches) in diameter or less;

• • b. At all angles in the sewer line;

• • c. At street intersection and other points where catch basins, inlets, or laterals are to be connected;

• • d. At points where pipe sizes change;

• • e. At points where the grade of the sewer changes;

• • f. All catch basins shall conform to the State Standard details.

• 3. Minimum Cover. All subsurface drainage structures and facilities within street rights-of-way shall have a minimum of 3' (three feet) from finished grade. All such drainage structures and facilities shall be inspected and approved by both the Director of Public Works and the Municipal Engineer before covering.

• 4. Settling of Backfill No pavement shall be placed over pipe installations within street rights-of-way until the backfill has been allowed to settle for a minimum of 30 (thirty) days, unless the Municipal Engineer determines a longer time is required.