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4. The Drainage and Sediment Control Plan submitted appears well organized and thorough. <br />However, the Division is perplexed by the first sentence of the last paragraph under the <br />heading Introduction on page 1 which states "The design information provided in this report <br />is understood to be conceptual and not for construction purposes." Rule 2.05.3(4)(a)(ii) <br />requires a detailed design plan for each sediment pond. This kind of "qualifier" is also <br />noted in the report under heading 3.1 particle size and under 4.0 diversion and collection <br />ditches. It is again noted on Map 2 of 2 Sediment Pond Details under the Notes heading. <br />Given the detail and effort put into this report, the Division would normally review this plan <br />under the assumption that it is the design for which Northfield is requesting approval. As <br />such, the Division would expect that this design be used for construction and following <br />construction, Northfield will submit an as-built certification for the pond, certified by a <br />registered, professional engineer. In light of our comments, please provide direction or <br />responses to these concerns. <br />This concludes our adequacy review of the revised materials. Once the cost estimate is updated, we <br />will provide a copy for your review under separate cover. Please submit responses to the issues <br />identified in bold text as soon as possible. If you have any questions, please contact me. <br />Sincerely, <br />Kent A. Gorham <br />Environmental Protection Specialist III