Otter Lake Source Water Protection

Project Description


Northwater began working with the Otter Lake Water Commission (OLWC) in 2010 to design and implement a long-term program to address water quality regulatory impairments for the reservoir.  The goal of the program is concurrently focused on improving the health of the lake to reduce water treatment costs and enhance the lake’s recreational value.  The program has been successful in achieving full support for a public and food processing water supply designated use.  As of 2014, aquatic algae and manganese have been delisted as regulatory impairments.  The project was awarded the prestigious Water Source Protection award by the American Water Works Association (AWWA).

A comprehensive lake and watershed assessment, modeling and monitoring program identified and quantified sources and causes of the impairments.  With this information and coordination with landowners, Northwater developed a detailed, multi-phase implementation plan and secured Illinois EPA Section 319 program funding for on-the-ground and in-lake treatment practices.

Planning projects to support lake and water management and improve water quality have included: lake and watershed assessments, shoreline erosion surveys, and an approved watershed management plan.  A watershed plan was completed in 2016 in response to new funding requirements and a need to stimulate additional and innovative lake and watershed improvements moving forward.  It synthesized past work and utilized advanced mapping and modeling to quantify lake nutrient and sediment loading and identify a host of new watershed and in-lake treatments.  This effort immediately resulted in an $800,000 United States Department of Agriculture (USDA), Regional Conservation Partnership Program (RCPP) grant to fund conservation practices on agricultural ground.

Northwater Consulting has served as the program manager and has provided a complete package of services to support the ongoing program.   To date, Northwater has helped the OLWC secure well over 1 million dollars of state and federal funding to improve lake water quality.

Northwater managed lake and watershed implementation, and completed a series of complementary studies, read more…

Otter Lake Water Source Protection – Program Implementation & Construction

Otter Lake Shoreline Erosion Assessment & Mapping

Otter Lake In-lake Sediment Control Basin Dredging Evaluation

We have been working with Northwater Consulting on lake and public water supply improvement projects for almost ten years. Their assistance in obtaining and administering federal grant funds and providing project management and technical expertise for Best Management Practice Implementation has been extraordinary. Northwater also conducted high level GIS analysis for lake erosion assessments and additional mapping supporting many of our projects. Not only has Northwater delivered products on-time and with exceptional quality and value, their problem solving skills have kept our projects on time and within budget.

- Dennis Ross, Manager, Otter Lake Water Commission

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