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<br />16 <br /> <br />share of providing off-site drainage facilities required, at least in <br />part, because of that development. <br /> <br />General Provisions <br />This subsection prescribes the general drainage requirements under <br />the regulation. The subsection requires subdivision disapproval unless <br />the developer adequately provides for both on-site and off-site drainage <br />and flood control facilities. The on-site facilities include all the <br />drainage facilities physically within the development for the conveyance <br />of potential stormwater resulting from the planned ultimate upstream <br />development. To obtain subdivision approval these facilities must be <br />installed, or the installation must be suitably guaranteed by a per- <br />formance bond. <br />The off-site facilities are those drainage facilities not actually <br />within the development but required, at least in part, to transport <br />the stormwater from the proposed development to the subbasin and basin <br />outlet. These facilities are generally provided through a cash payment <br />of the Off-site Drainage Fee (ODF). However, the regulation allows <br />for developer construction of off-site facilities in situations where <br />such construction is practicable and desirable. Any money expended <br />for this off-site construction in excess of the applicable ODF for the <br />development is subject to reimbursement under the regulation. If <br />off-site facility construction is required, it will also have to be <br />installed or suitably guaranteed prior to subdivision approval. <br />Procedurally, the developer is required to retain a registered <br />professional engineer to prepare construction drawings for the required <br />drainage facilities. The facilities are to be designed in accordance <br />with local design standards and criteria. The developer then constructs <br />