This subchapter shall apply to all projects whether the storm water management system or portions thereof will be dedicated to the Department or retained privately. After completion of construction of the project and before the release of required performance assurances referenced in § 52.512, a professionally prepared and certified “as-built” set of plans (record drawings) shall be submitted to the Department for review. These as-built plans/record
drawings must be prepared and certified by the Engineer of Record, i.e., the company/engineer who originally prepared the construction plans. Additionally, a digital copy of the “as-built” plans (record drawings) as well as finalized digital versions of all analyses, models, manuals, and reports that are consistent with the as-built conditions is required in a format acceptable to the Department. These plans shall include all pertinent data relevant to the completed storm drainage system and storm water management facilities, and shall include:
(A) Pipe size and pipe material;
(B) Invert elevations;
(C) Top rim elevations;
(D) Elevation of the emergency overflow (spillway) for ponds;
(E) Grades along the emergency flood routing path(s);
(F) Pipe structure lengths;
(G) BMP types, dimensions, and boundaries/easements;
(H) "As-planted" plans for BMPs, as applicable;
(I) Data and calculations showing detention basin storage volume;
(J) Data and calculations showing BMP treatment capacity; and
(K) Certified statement on plans stating the completed storm drainage system and storm water management facilities substantially comply with construction plans and the storm water management permit as approved by the Department. (See certificate in the Storm Water Technical Standards Manual.)
(Ord. 2023-11, passed 8-1-2023)