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Catchment Profiles <br />Project ID: RR8-A <br />Rivers Bend Park <br />Pond Modification <br />Drainage Area — 38.0 acres <br />Location — Rivers Bend Park south of 142nd Ave <br />NW — Waco St. NW intersection <br />Property Ownership — Public <br />Site Specific Information — The existing pond, <br />P25216 receives drainage from the entire <br />catchment and is currently undersized to treat the <br />contributing drainage area. An expansion and <br />dredging of the pond is recommended to increase <br />the permanent pool storage, thereby promoting <br />sediment settling and phosphorus retention. <br />Proposed increases in pond storage will increase <br />permanent pool surface area from .11 acres to .82 <br />acres and average ponding depth from 1 ft. to 6 <br />ft. Cumulative pond storage volume could <br />increase from an estimated 0.05 acre-feet to approximately 2.0 acre-feet. <br />BMP Modification <br />BMP Drainage Area <br />Storm Sewer Line <br />• nutff1I <br />• Catch Basin <br />BIYl1odification <br />Cost/Removal Analysis <br />New Treatment: <br />0 <br />0 New Treatment Re <br />New Treatment <br />h <br />0 <br />Pond Management L <br />Amount of Soil Excavated <br />[TP (Ib/yr) <br />TSS (Ib/yr) <br />Volume (acre-feet/yr) <br />Administration & Promotion Costs* <br />Design & Construction Costs** <br />Total Estimated Project Cost (2016) <br />• al O&*** <br />30-yr Average Cost/Ib-TP <br />30-yr Average Cost/1,000Ib-TSS <br />30-yr Average Cost/ac-ft Vol. <br />7.7 <br />3,672 <br />0.2 <br />1 <br />3,100 cu-yards <br />47.8% <br />66.4% <br />1.0% <br />$5,840 <br />$147,000 <br />$152,840 <br />$900 <br />7.7 <br />3,672 <br />0.2 <br />2 <br />3,100 cu-yards <br />47.8% <br />66.4% <br />1.0% <br />$5,840 <br />$193,500 <br />$199,340 <br />$900 <br />7.7 <br />3,672 <br />0.2 <br />3 <br />3,100 cu-yards <br />47.8% <br />66.4% <br />1.0% <br />$779 $980 $1,203 <br />$1,633 $2,055 $2,522 <br />N/A N/A N/A <br />*Indirect Cost: 80 hours at $73/hour <br />**Direct Cost: See Appendix B for detailed cost information <br />***$1,000/acre of pond surface area - Annual inspection and sediment/debris removal from pretreatment area <br />$5,840, <br />$245,000 <br />$250,840 <br />$900. <br />City of Ramsey Stormwater Retrofit Analysis <br />