The work to be done under this section includes furnishing all materials, labor, tools and equipment necessary or incidental to the complete construction of drop manholes at the locations shown on the drawings or as designated by the Engineer. Drop manhole construction shall be required where the difference in elevation between the bottom of the manhole and any incoming sewer exceeds 24 inches. Details for the construction of drop manholes are attached hereto. All previous conditions as stated under §
121-58, Standard manholes, of these specifications shall also apply to this item, with the additional construction as required and as shown on the details.