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LRRWMO Meeting Minutes February 12, 1992 Page 5 W1: Drainage velocity is twelve feet per second. WMO standards are a maximum of eight feet per second. Jankowski stated Ramsey proposes to modify the outfall by adding another structure, a surge basin, which will be resubmitted to Barr Engineering for Skallman's review and consideration. However, Jankowski reported Barr Engineering found those to be not very effective. He argued the surge basin's design criteria for velocities can be as high as thirty feet per second utilizing rip rap. While he feels the WMO's maximum eight feet per second is arbitrary, Ramsey is willing to go through the process again. Jankowski indicated another comment from the DNR is that although the discharge from outfall W1 goes into Chestnut Pond, the DNR has required some sort of sedimentation control be provided at the outlet control to the wetland. Ramsey has reportedly proposed to create a sumped out area downstream with rip rap, allowing for cleaning. Although this is not a WMO plan requirement, Ramsey is required to satisfy the DNR. Jankowski asked for LRRWMO approval of this plan based on LRRWMO requirements and let the City of Ramsey deal with the DNR. W6: Jankowski indicated a similar objection was made for this outfall. While he originally proposed a nine per cent slope, resulting in a velocity of fourteen feet per second, he is now proposing the same type of structure be installed here as is proposed for W1. W5: Jankowski stated Skallman refers to W6 when he indicates the proposed development is not in compliance with all LRRWMO standards; however, he believes Skallman means W5. P1: Jankowski stated this outfall discharges into a Class B water body. He indicated the drainage area for the discharge point is small enough and there is sufficient area there that they can put in a sedimentation basin with a skimmer on the end and will, therefore, comply with LRRWMO criteria. Jankowski indicated Ramsey will resubmit plans for P1. P2: Jankowski stated this outfall drains the largest area in the subdivision, approximately forty -two acres. He proposes a pond be constructed within the park area to handle much of the discharge. Ramsey reportedly plans to install a skimmer on the outfall, and drainage will go into the adjacent protected wetland via discharge P2. This process will collect water and discharge it directly into the bay without providing for sedimentation. Jankowski asked for considera- tion to allow this variance due to the fact that the prelim- inary plans for this subdivision was approved prior to the