All Projects

The goal of this project is to continue and finalize Hydrological Simulation Program FORTRAN (HSPF) watershed model construction and complete the calibration/validation process. The consultants will produce HSPF watershed model applications for the Lake Superior North and Lake Superior South watersheds that can readily be used to provide information to support conventional parameter Total Maximum Daily Load (TMDL) projects.

This project will finalize the guidance document to ensture consistency and validity of future Hydrological Simulation Program FORTRAN (HSPF) model applications within the State of MN. This improved guidance will help to ensure consistency and validity of future HSPF model applications within the State as part of the One Water Program.

This project will support the development, enhancement, and support of the statewide Minnesota Pollution Control Agency Hydrologic Simulation Program – Fortran (HSPF) Model Repository, HSPEXP+ (enhanced expert system for HSPF model calibration), HCALC (HSPF Calibration Control), HTEXT (HSPF Timeseries Extension), Scenario Application Manager (SAM), and Preprocessing Application Translator for HSPF (PATH).

The goal of this project is to continue the development of Hydrologic Simulation Program FORTRAN (HSPF) model application tools improve and expand the effective application of HSPF models.

This project will construct, calibrate, and validate two Hydrologic Simulation Program FORTRAN (HSPF) watershed models. The consultant will produce HSPF models that can readily be used to provide information to support conventional parameter Total Maximum Daily Load (TMDLs) at the Big Fork River and Little Fork River watersheds.

This project will complete spatial and temporal revisions of 6 Hydrologic Simulation Program FORTRAN (HSPF) models, the recalibration and validation of 7 watershed HSPF models, and the revision of the drainage network and point source representation of the Pomme de Terre HSPF model.

The goal of this project is to develop a watershed-scale decision support tool, Scenario Application Manager (SAM), to facilitate prioritization and placement of best management practices (BMPs) needed to achieve the necessary reductions identified by various watershed management programs in Minnesota. SAM consists of a Geographic Information System (GIS) for site selection, and Hydrological Simulation Program – Fortran (HSPF) model application to simulate the transport of pollutants.

The goal of this project is to refine the segmentation, extend the simulation period, and recalibrate an existing Hydrologic Simulation Program FORTRAN (HSPF) watershed model for the Rum River Watershed.

The goal of this project is to develop the guidance needed for water quality parameter evaluation and calibration for Hydrological Simulation Program – FORTRAN (HSPF) applications that utilize the general water quality constituent routines on the land surface to generate loadings of nutrients and organic material for input to water bodies to support dissolved oxygen (DO), nutrient, and algal simulation.

This project is for constructing, calibrating, and validating a Hydrologic Simulation Program FORTRAN (HSPF) watershed models for the Minnesota portions of the Des Moines Headwaters, Lower Des Moines, and East Fork Des Moines watersheds. The model can be used to provide information to support conventional parameter Total Maximum Daily Load (TMDL) reports. This model generates predicted output timeseries data for hydrology, sediment, nutrients, and dissolved oxygen that are consistent with observed data.

The goal of this project is to construct, calibrate, and validate two (2) watershed models using Hydrologic Simulation Program FORTRAN (HSPF).

Construct, calibrate and validate 3 Hydrologic Simulation Program FORTRAN (HSPF) watershed models for the St Louis, Cloquet, and Nemadji River Watersheds.

The goal of this work is to enhance the Scenario Analysis Manager (SAM) tool. These enhancements will enable point source and stressor identification staff within the state to quickly access data, facilitate their research, and develop scenarios. This work will focus on the development of SAM by creating a user friendly interface, expanding the BMP database, and improving the BMP simulation methodology including optimization functionality. Additionally, this work includes development of a HSPF validation tool, testing and QAQC, and provides documentation and training to expected users.

Minnesota faces many water quality and quantity challenges. State, federal and local organizations are faced with understanding hydrologic and water-quality problems and targeting cost effective solutions that are based in science. The Minnesota Pollution Control Agency (MPCA) has standardized its modeling approach for the development of the Watershed Restoration and Protection Strategies (WRAPS) and Total Maximum Daily Load (TMDL) reports required by state and federal law.

The purpose of this project is to identify effective irrigation and nutrient management best management practices and technologies and the barriers that prevent irrigators, producers, and other agricultural partners from adopting them in Otter Tail County. The primary goal is to reduce nitrate in areas where groundwater is susceptible to contamination as mapped by The Minnesota Department of Health by identifying effective BMPs and addressing the barriers to their adoption.

Mower County has completed the first phase of their county-wide imminent public health threat inventory and are currently in the process of phase two. This project will fund the third phase which will allow Mower County to inventory over 1,400 sites and remove an anticipated total of 230 imminent public health threats from discharging to local waters or to ground surface.

In partnership with the Chisago Lakes Lake Improvement District, subwatershed assessments for the communities of Center City, Lindstrom and Chisago City, all within the Chisago Lakes Chain of Lakes watershed have been completed. The tourism economy of these communities depends on the Chisago Lakes Chain of Lakes.

In partnership with the Washington Conservation District and City of Woodbury, this project will improve water quality in Colby Lake through implementing 30 priority small-scale water quality conservation practices. Projects may include bioretention, vegetated swales and pond modifications. Priority projects were identified as part of the Colby Lake Watershed Retrofit Assessment and represent the most cost-effective means to reduce excess phosphorus loads that have impacted Colby Lake.

Green Lake is a popular and regionally significant lake. Monitoring data collected on Green Lake indicates that the lake's water quality is declining. Over recent decades, development in the City of Spicer and around Green Lake has increased dramatically, resulting in much higher percentages of impervious surfaces such as parking lots, driveways and roads. The resulting increase in runoff velocities and volumes require the incorporation of stormwater infrastructure to accommodate water that previously infiltrated soils.

This water quality improvement project involves the retrofit of county ditch #31 also known as Connelly Ditch. The capacity of the ditch is inadequate and there is a need to reduce sediment and peak flows to it.

The Crow River is known to be one of the highest nutrient loading watersheds in the Upper Mississippi River Basin. Years of water quality monitoring confirm a variety of water quality issues in drainage ditches. These include high nutrient loading and delivery of high levels of suspended solids to downstream receiving waters such as Diamond Lake which is negatively impacted for elevated phosphorus levels.

Agricultural drain tiles with surface intakes are considered a significant delivery mechanism of nutrients to Minnesota River. Protecting those surface water inlets can reduce the direct path those nutrients have to the river. In addition, in agricultural fields with subsurface drainage, leached nitrate creates elevated nitrate levels in tile drainage water. These high nitrate concentrations can cause algae blooms that remove oxygen. To help remove nitrates leached into tile drains, wood chip bioreactors can be installed to remove nitrate from the tile water before it enters surface water.

As the City of Wadena is being re-built after an EF4 tornado, it has become evident that more needs to be done to reduce runoff by retaining or diverting stormwater. The purpose of this project is to provide subgrants to citizens to install various conservation practices on their properties including grassed waterways, rain gardens and tree plantings. Through this subgrant program the citizens of Wadena will have a greater understanding of the importance of stormwater management.

The proposed project will be in conjunction with an improvement project to the 103E County Ditch 63 Lateral N (CD 63) system. The project will accomplish the construction of five water and sediment control basins (WASCOB) and five alternate intakes to replace open intakes within the CD63 system, which is the headwaters of Beaver Creek East Fork. The construction and installation of the conservation practices will achieve a reduction of sediment, provide temporary water storage, and reduce peak flows that allow sediment and phosphorus to directly enter impaired Beaver Creek East Fork.

Agricultural drainage is very prevalent practice in Dodge County and there is a need to implement practices to that will better manage flow and pollutant loads that are being contributed to nearby surface waters. This project involves the installation of a woodchip bioreactor on a tile-drained agricultural field, which will feature improvements in design, and monitoring scope, as compared to a previous bioreactor constructed in Dodge County in 2007.

Pasture and hayland account for 62% of the agricultural land use in Clearwater County. In 2012, it was the 12th largest producer of beef cattle in Minnesota. In a county where 22% of pasture/hayland acres are within 300 feet of riparian areas, management practices need to be introduced that enhance rather than restrict the farm operations that use these zones for their livelihood. Clearwater County's Silver Creek and Ruffy Brook are currently listed as impaired by fecal coliform.

Demand for Engineering services in Northeast Minnesota's nine-county Area III Technical Service Area is exceeding the capacity to deliver the needed services. There are increased requests from Soil and Water Conservation Districts for engineering needed to design and install Best Management Practices in part due to requests related to Clean Water Fund projects. These funds will be used to hire an engineer, which will increase engineering capacity and result in the completion of at least five additional projects per year.

The Minnesota Pollution Control Agency (MPCA) has identified streamflow alteration as a key stressor on aquatic life, but the characteristics of streamflow alteration acting as a stressor has not been identified in the MPCA Watershed Restoration and Protection Strategy (WRAPS) process. Without indices that characterize streamflow alteration, the MPCA cannot quantitatively associate metrics of aquatic life condition to streamflow alteration. The lack of quantifiable indices limits the ability of the MPCA to assess environmental streamflow needs for streams and rivers throughout Minnesota.

The purpose of this project is to develop recommendations and identify information for incorporating green infrastructure into the Stormwater Manual. LimnoTech will also review and suggest changes to the tree interception credit currently given to the tree trench/tree box best management practice (BMP) in the Minimal Impact Design Standards (MIDS) Calculator and manual. This work will provide information that Municipal Separate Storm Sewer (MS4) permittees can use to help meet permit requirements and stormwater management goals.

The north-central Minnesota counties of Cass and Hubbard share large portions of the Crow Wing River, Leech and Upper Mississippi Watersheds, all of which play an important role in providing clean drinking water to over one million Minnesota residents. Each county assumes the responsibility of inspecting and evaluating the judicial and county ditch systems that drain directly into these watersheds. The two counties together share two judicial ditch systems and combined have an additional 42 ditches within their borders.

In collaboration with the University of Minnesota St. Anthony Falls Laboratory, City of Stillwater and MN DNR Waters and Fisheries an iron-enhanced sand filter will be designed. This filter will remove approximately 118 pounds of total phosphorous per year from an area of Stillwater that ultimately drains to the St. Croix River, a national Wild and Scenic River that has a decling water quality trend.

The Minnesota River Basin Hydrological Simulation Program FORTRAN (HSPF) models simulate sediment erosion and transport, however these models periodically need to be adjusted to be consistent with the most recent sources of information regarding sediment distribution and loading rates. The goal of this project is to refine the sediment source partitioning and simulation in the Minnesota River basin using all relevant available sources of information.

This project builds upon the success of the Minimal Impact Design Standards (MIDS) Community Assistance Package by working hands-on with up to 13 communities in the St. Croix River Basin to adopt ordinance and code revisions to incorporate MIDS stormwater quality and volume standards for new development and redevelopment.

The Middle Fork Crow River Watershed District will conduct a river assessment to determine the scope of eroding riverbanks and a stormwater modeling project to identify targeted locations for stormwater management. The river assessment will: 1) verify that streambank erosion is the major contributor of pollutants, including sediment, Phosphorus, and Nitrogen; 2) catalog and quantify the erosion, and; 3) provide an assessment of reductions that could be achieved using specific solutions.

The Minnesota River Basin Hydrological Simulation Program FORTRAN (HSPF) models, which simulate flow and pollutant transport, need to be refined to be consistent with the most recent external sources of land use, hydrologic response, and surface flow attributions. The primary goal of this work is to refine the hydrologic calibration in the Minnesota River basin.