Big Green Lake is located in Green Lake County of east central Wisconsin. The lake has a surface area of 7.346 acres, mean and maximum depths of 104 and 236 feet, respectively . The lake has two principal inflows, Silver Creek from the east and the Southwest Inlet. After a number of lake planning grants the Lake District received a lake protection grant from the DNR in 1998 to complete a diagnostic feasibility study. One component of the diagnostic study process is the development of a water and nutrient budget for the lake as well as a water quality model. The model will be used in the goal setting process to evaluate the impact of watershed pollutant load reduction on water quality improvement. This report will focus on the methods, results and discussion pertaining to modeling. Any other aspects of the monitoring or diagnostic work will be discussed only briefly and limited in context to modeling.

Project to evaluate feasibility and public acceptance of a PL 566 project for Big Green Lake Watershed. WIll involve a mail questionaire to are residents to assess: a) public opinion of large water impoundments, b) public opinion of eminent domain andcondemnation powers, c) which units of government will need to be involved with the project and at what level.

Conducted a survey of residents, by mail, to assess: a) public opinion of large water impoundments, b) public opinion of eminent domain andcondemnation powers, c) which units of government will need to be involved with the project and at what level.

Assess feasibility and costs of further phosphorus reduction from effluent of Ripon Sewage Treatment Plant: a) evaluation of current phosphorus removal practices and their associated costs, b)evaluation of various strategies to reduce levels of phosphorus being discharged as to their costs and their potential for phosphorus reduction, c) small-scale pilot program implementing option chosen from evaluation in b. above, devaluation and monitoring of phosphorus reduction in conjunction with pilot program