§ 631S.4. Construction Methods

All trees, brush, stumps, obstructions and other objectionable material shall be removed and disposed of so as not to interfere with the proper functioning of the swale, as indicated on the Drawings.

The swale shall be excavated or shaped to line, grade and cross section as required to meet the criteria specified herein and Standard Detail 631S-1, "Interceptor Swale" and shall be free of bank projections or other irregularities which could impede normal flow.

All earth, that is removed and not needed in construction, shall be disposed of at an approved spoils site so that it will not interfere with the function of the swale.

"Interceptor Swale" shall have a level bottom and shall have an outlet that functions with a minimum of erosion.

Runoff shall be conveyed to a sediment-trapping device, as indicated on the Drawings.

Stabilization, when required, shall conform to Standard Specification Item No. 591S, "Riprap for Slope Protection" and/or Standard Specification Item No. 627S, "Grass-Lined Swale and Grass-Lined Swale with Stone Center".

The structure shall be inspected monthly and after each rainfall. Repairs shall be made by the Contractor, as needed throughout the duration of this Contract or until the Engineer or designated representative issues written permission to remove the structure.