Recent Project Experience

Mount Morris Lake Aquatic Invasive Species Control & Prevention - Current

Previous studies completed by Onterra discovered nuisance levels of curly-leaf pondweed (CLP) through out many parts of Mt. Morris Lake. Eurasian water milfoil was also found, but in very limited occurrences. Onterra created a 5-year treatment plan that includes herbicide treatments, deep harvesting, and hand-removal of CLP. Onterra’s role in the project includes pre-treatment monitoring, monitoring of treatment effectiveness, and training of lake stakeholders in aquatic plant monitoring, and water quality sample collection.

Onterra assisted the project sponsor in their successful application for an Aquatic Invasive Species Grant to help fund the project


Little Saint Germain Aquatic Invasive Species Project - Current

Curly-leaf pondweed (CLP) was found in Little Saint Germain Lake early in the summer of 2002. Eurasian water milfoil (EWM) was located in a single bay during the late spring of 2003. The Little Saint Germain P & R District successfully applied for a Aquatic Invasive Species grant in 2004 to assist with funding of chemical treatments and professional monitoring.

Onterra’s responsibilities in the project include, two comprehensive aquatic plant studies, pre-treatment surveys, post-treatment monitoring, and data analysis/reporting.


Town of Saint Germain Aquatic Plant Management Planning - Current

Onterra is currently working with the Town of Saint Germain to create a town-wide aquatic plant management plan covering eight of the town’s lakes. This unique project began in the summer of 2004 with comprehensive aquatic plant studies of the town’s lakes. The Town of Saint Germain Aquatic Plant Management Plan will be completed early in the summer of 2006.


Buffalo Lake Comprehensive Lake Management Plan - 2006

Buffalo Lake is a large and shallow impoundment of the Upper Fox River in Marquette County. The Buffalo Lake P & R District has spent in excess of $80,000 annually for the past decade harvesting nuisance levels of native and non-native plants from the lake. Looking for other options, the district contacted Onterra to complete a thorough study of the lake ecosystem and assist them in completing an implementable lake management plan. The project has been completed in three phases spanning over 2½ years. This project is unique because of the incredible amount of stakeholder participation that was used to develop the plan; including, two district surveys, over a dozen steering committee meetings, a lake fair, and a public hearing. The draft management plan has been accepted by the district and will be finalized spring 2006. Portions of the implementation plan, including a winter water level drawdown will be voted on by the district members during June 2006.


East Alaska Lake Alum Treatment Feasibility Study - 2005

East Alaska Lake was historically loaded with tremendous amounts of phosphorus from its watershed. Many of the largest external sources have been controlled; however, the lake still experiences nuisance algae blooms as a result of internal nutrient loading. Onterra completed a study determining the extent of internal loading and the levels of phosphorus being loaded through the lake’s primary tributary and an agricultural draintile. The study determined that there was a great deal of internal loading and that completing a alum treatment would not be feasible until the loadings from the draintile were minimized. Currently, the lake association is beginning the construction of a wetland detention basin based upon Onterra’s recommendation to treat the draintile discharge