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Home My WebLink About11-04-1998 Council Special SessionA C ity of Orono C ity C ouncil Special Session Wednesday , N ovember 4,1998 7:30 A.M. Agenda : 1. Brief review of the last City Council morning session. 2. Plan preparation - How we arrived at where we are today. 3. Implementation of Best Management Practices and Education for the community, (ex. Stormy) 4. Discussion of how the plan will be a tool to the community with the use of the attached flow-charts for New Development and Redevelopment. 5. Discussion of the meeting with the watershed. 6. Open forum I «• Goals and Policies This section presents the goals and policies that will form the framework of the stormwater management strategies of the City of Orono. The general objectives of the Orono Stormwater Nlanagement Plan, SW^MP, are as follows: ♦ Reduce to the greatest practical extent the public capital expenditures necessary to upgrade the stormwater system in order to meet water quantity and quality standards. ♦ Minimize existing flooding, erosion and sedimentation problems generated by surface flows. ♦ Improve stormwater quality in all protected waterbodies by maximizing the amount of areas available for treatment. ♦ Protect groundwater quantity and quality by allowing for passive treatment and infiltration of stormwater. S' ^♦ Promote groundwater recharge by creating additional ponding areas. ♦ Protect and Enhance water recreational facilities and fish and wildlife habitat. ♦ Preserve vegetation around stormwater detention areas by leaving them in a natural state, thereby reducing maintenance. Plan Preparation An outline of the steps involved in the preparation of the plan is presented below; 1. Based on the guidance provided by the 1974 Orono :Uormwater Management Plan, establish a set of Stonnuaier Management G'.^ tls and Policies for the successful implementation of this plan. 2. Determine watershed, drainage district and subdistrict boundaries for use in sizing storm sewers, open channels, and ponding areas. 3. Relate existing land use and future land use as presented in the 1995 Comprehensive Land Use Plan to the probable amount of stormwater runoff anticipated. 4. Review and update subdistrict drainage boundaries based on two foot contour maps and final grading plans. 5. Establish routing of stormwater conveyance facilities. 6. Establish location, size, and flood elevations of stormwater ponding areas for water quantity control. 7. Investigate alternatives that might affect the feasibility or economy of segments of the system. 8. Determine design criteria for nutrient treatment ponds to improve water quality in City waterbodies. Establish pond wet volumes to achieve water quality goals for these waterbodies. 9. Estimate the cost of storm drainage facilities to provide a guide for development of a sound and equitable financing program. 10. Review and/or update the existing plan to meet the current and future needs of the Citv. L. I i Eir-i lUl Jl — 1 .. Grass Chtspings Loaves Pesticides ^ TOXIC MATCntAtS Pet Wastes ^4 Auto Exhaust IMl^ Motor on Lubricants Gasoline Tire Wear Eroded Soil I SSSiia^KiV'‘^ 4IKD street Litter » !.: • t • !>• What cities can do to help: • Adopt and enlorco erosion conlrol ordmancos lor construction sites • Require stormwater controls in all new developments. • install stormwater controtn in existing areas wher:; stormwater is very polluted • IrK/easo spertg and tall street sweeping. • Require leaves and other yard wastes to be placed along the curb lor (:oIlei:lir)fi ralhr>r than in the (jiitlnr With thousands of storm sower inlets around tc»vn, stormwater is a major contributor to water pollution in urban areas. Although each storm sewer inlet coninbufes only a small number of pollutants, when added together, pollution corKroniralions often exceed the limits established for indusines and wastewater treatment plants If the pollutants entering each ol these inlets can be reduccKl. so will the polluiion in area waters. . • * •. V ‘ oxYr.rn ^CONSUM'NTi • • Metal Corrosion ZINC, corrrn ‘.r*3H::nn • m •• f 'Mo • • •. lOX'^ • • What you can do to help: Do not allow soil, loaves or grass dip|»«nys >0 nrxumulalii on your driveway, sidewalk or in ihn sfreel Do no! use the storm sower for disposing of motor oil. anlifrooze. pesticides, paints, solvents, or othnr materials Sweep (do not wash) fi*dil»li/nr arwl soil off driveways arn! walkways Any debns remaining on pavrxJ areas will quickly tie washed into the nearest siorm snwor during Ihn noiri rainfall Mmimi/e your use ol de icing matenals on sidewalks aru! dnveways Disjiosn ol pel waslus l>y nuslung lhi»m down Ihn toilat or tiy bunal :^l.: UWUX aiul Wisati^n DNR To lake, river or wetland City of Orono New Development - Any land currently natural or in a wooded state with impervious surfaces, including subdivisions of land. Is there a downstream water quality pond facility identified in the SWMP. Is it located on site?Is it lakeshore property? Construct the pond Cash contribution for the p-’ding area downstream and BMPs Require 6(y*/o nutrient removal. cash dedication - WQ alternative • BMPs Cash contribution and BMPs Is it lakeshore property? Require 60% nutrient removal. cash dedication - WQ alternative - BMPs Construct ponding facility i i i City of Orooo • Treatment Alternatives City of Orono Cify of Orotto • Treatment Alternatives Kcdcvciopiiiciit of Individual Lots ; ■ I ■: i« I • ■ t. II1 InstnII NUKI’ pomi livalu.nic to|X)grnphy - Is a NURI’ pond possible? Kvaiiialc Site:Is there a - I'opography downstream • Soil (kmdiliuns -----►water (|uality > Wetlands pond lacilily - Available space idenlilled in the Percentage ol’Impervious SWMI'? • IMmsphums loading .N Dclcrminc % of impervious suir<iccs Mechanical Device - and/or cash contribution Combination of mcchunical device and Bio-removal alternative and/or cash contribution Bio-rcinoval alternative Is the site a Lnkcshoic lol? Nutrient removal of 00% is desired. Some level of water ipiality treatment is reiiuired. (a minimum of a sediment trap) The city will determine if the tu|K)t>taphy doesn ’t allow for construction of any of the listed alternatives described on page 3. The city will then accept a cash contribution in lieu ol'tlie ueieenlnue «>!'removal not obtained Cash contribution will be re(|uircd to treat the ohosnhorus levels liorn the site.