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52 Stormwater Retro -tit Study Invoice — Lake Owasso Retro -fit Study 53 Mr. Petersen distributed copies of the "Lake Owasso: Urban Subwatershed Stormwater Retrofit 54 Assessment" prepared for the GLWMO by Ramsey Conservation District; and their invoice in the amount 55 of $8,440.00. Mr. Petersen advised that the total cost of the analysis was $12,040, with MCD Clean 56 Water Fund Grant funding in the amount of $3,600, and the net cost payable by the GLWMO Board as 57 previously authorized. 58 59 Member Huffman requested highlights or examples of the assessment and how it can be used 60 appropriately and informatively in the future. 61 62 Mr. Petersen noted that the approach was to analyze a lake or subwatershed (e.g. Lake Owasso) and 63 divide those subwatersheds into "neighborhood watersheds" based on models to formulate how much 64 total solids and phosphorus were flowing from those areas i.e., (external loads) to Lakes versus internal 65 loadings. Mr. Petersen noted that mathematical calculations were then provided on existing loading, as 66 well as the potential impacts of Best Management Practices (BMP's) once in place compared to the 67 current loadings. Mr. Petersen advised that there was current data available for external as well as 68 internal benchmarks for major lakes. Mr. Petersen volunteered to make a presentation to member City 69 Councils, along with Mr. Mike Goodnature of the RCD, the assessment designer, at the request or 70 discretion of the respective City Councils. 71 72 Member Huffman spoke in support if such an educational opportunity directly to member City Councils 73 to make sure the assessment remained of value to those communities. Member Huffman asked that Mr. 74 Petersen make sure Mr. Schwartz and Mr. Maloney were made aware of that offer. 75 76 Mr. Petersen advised that he would be submitted a copy of the study to Ramsey - Washington Metro 77 Watershed District (R -WMWD) as part of the Draft Third Generation Plan for the GLWMO, as well as 78 the UAA Study by Barr Engineering; anticipating that R -WMWD will integrate it into their new 79 operational plan for the entire watershed, including the GLWMO geographical area. Mr. Petersen 80 advised that his intent was to also talk to Mr. Schwartz and Mr. Maloney to identify practices in 81 cooperation with R -WMWD for grants from the Clean Water Legacy Fund. Mr. Petersen offered his 82 assistance to those member cites; advising that studies such as this one were looked upon very favorably 83 and took high priority for grant funds when this type of supporting documentation was available. 84 85 Member Huffman sought to ensure that the study was actionable, such as for road construction projects, 86 etc. 87 88 Mr. Petersen concurred, advising that it was never his intent that this study bi -pass the work of either city; 89 and sought to ensure that they would benefit as part of their internal infrastructure and water quality 90 efforts. 91 92 The consensus of the GLWMO Board was to encourage Mr. Petersen to have discussions with member 93 City staff to schedule a future presentation to the City Councils by he and Mr. Goodnature of the RCD. 94 95 Chair Miller opined that it was an excellent report, especially the detailed cost benefits, priorities for 96 maintenance costs, and identifying residential or commercial as well as private or public properties. 97 98 99 100 101 102