Projects by Type:
Hydrologic/Hydraulic | Infiltration | Monitoring | Natural Resource Management
Hydrologic/Hydraulic
Wilmes Lake Flood Damage Reduction Program
In response to the October 2005 storm event, a Flood Relief Grant Program was developed. The program is desingned to provide funding assistance to property owners that have experienced flood damage or are at risk of flooding in future events. The program has a variable level of City grant contributions based on the susceptibility of flooding for each property.
The City of Woodbury in conjunction with the SWWD, offers residents a Flood Relief Grant Program that reimburses a share of the costs for retrofitting or making changes to an existing building to protect it from flooding. Property owners may be eligible for up to 75 percent City share, not to exceed $50,000, of a flood relief project. The grant may be used for a portion of design and plan preparation costs and eligible contracted flood protection improvements.
Wilmes Lake Gates
Wilmes Lake has experienced high water conditions in the past. In 2003 the SWWD conducted a study of the contributing watershed to Wilmes Lake. The results of this study indicated that high water conditions from a 1% return interval storm could produce a high water level and potential flood damages to property. The introduction of new information for the watershed, improved technology in modeling and updated hydrology for the area all contributed to a revise high water elevation for Wilmes Lake above the original design. To manage high water elevation at Wilmes Lake the SWWD recommended non-structural solutions for flood control, sub-watershed standards and gated structures in four locations to control flow and reduce flood duration.
Engineer’s Report – Central Draw Project and Flood Storage Area Maps – Final. HDR. June, 2002
The purpose of this report was to present a project to correct existing flooding conditions and identify associated flood storage areas in the communities upstream of Bailey Lake. Hydrologic and hydraulic modeling was used to assess existing conditions of the storm water system. The proposed project provides a principle outlet to the Mississippi River capable of managing the excess runoff associated with a 100-year 24-hour event under existing conditions.
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Infiltration
Guidance on Specific Infiltration Techniques. Emmons & Olivier Resources. April, 2002
Contents: This guidance document supplies the SWWD with a number of tools the District can use for the implementation of its volume control standards. It includes six fact sheets containing the definitions of volume control techniques, general design, construction and maintenance criteria diagrams and examples.
Relevance: These documents provide tools for the District to guide future infiltration projects and development of design criteria.
Download Report (4.5mb)
2005 Infiltration Monitoring Program Final Report. EOR. Feb. 2006
Contents: The SWWD has been monitoring infiltration as part of the Infiltration Management Study initiated in 1997. These documents contain the methodology and results as well as a summary of infiltration rates and analysis, conclusions and recommendations for the infiltration of groundwater.
Relevance: These documents provide summaries of data for guidance of the infiltration of groundwater. The reports are useful for reference in developing design criteria for the District.
Download Report (5.0mb)
Past Infiltration Monitoring Reports, by Emmons & Olivier Resources (EOR):
2004 Infiltration Monitoring Report. EOR. Feb. 2005 (6.6mb)
2003 Infiltration Monitoring Report. EOR. Feb. 2004 (3.4mb)
2002 Infiltration Monitoring Report. EOR. Mar. 2003
2001 Infiltration Monitoring Report. EOR. Nov. 2001 (1.0mb)
2000 Infiltration Monitoring Report. EOR. Nov. 2001 (1.0mb)
South Washington Watershed District Infiltration Management Study Phase II Report. Emmons & Olivier Resources. November, 2001
Contents: This document includes the data collection, monitoring, analysis, and modeling for the purpose of evaluating the importance of infiltration as a stormwater management tool. The data used in this report is from 8 monitoring wells at 5 basins that the SWWD installed in 1998. The City of Woodbury also samples 3 wells in the vicinity of CD-P85 for water quality and groundwater level. This report examines the effects of stormwater infiltration on groundwater quality, level, and environmental resources.
Relevance: This report discusses the benefits and impacts of stormwater infiltration on groundwater quality and level. This report is useful for reference in developing design criteria for the District.
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Monitoring
Watershed Monitoring Reports. Washington Conservation District (WCD)
Contents: These documents contain a summary of methods and results for various surface water monitoring efforts by the Washington Conservation District (WCD). Generally, data is presented with respect to 8 lake levels, groundwater levels at 7 stations; stream flow discharge rate, volume and quality, runoff discharge rate and volume, precipitation; and, lake water quality for Armstrong and Powers Lakes. Discussion and interpretation of the results was outside the scope of the documents.
Relevance: These documents provide data for future analysis (at the discretion of the SWWD).
2006 South Washington Watershed District Monitoring. WCD. May. 2007.
2005 South Washington Watershed District Monitoring. WCD. Apr. 2006.
2004 South Washington Watershed District Monitoring. WCD. Feb. 2005.
2003 South Washington Watershed District Monitoring. WCD. Apr. 2004.
2002 South Washington Watershed District Monitoring. WCD. Mar. 2003.
2001 South Washington Watershed District Monitoring. WCD. Feb. 2002.
2000 South Washington Watershed District Monitoring. WCD. May 2001.
Natural Resource Management
Comprehensive Lake Management Plan for Ravine Lake, Washington County, Minnesota. Steve McComas, Blue Water Science. January 2003.
This lake management plan was prepared based on the results from a comprehensive study conducted from 2000 – 2002. The study found that while the lake is nutrient-enriched, there are healthy vegetative communities (both aquatic and shoreline) which show minimal signs of disturbance. Watershed and lake response modeling indicated that it will be difficult to attain low in-lake nutrient levels even under minimally impacted reference conditions. The findings suggest the lake is desirable for wildlife, habitat, and passive recreation. Seven management options were recommended by the study.
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SWWD CD-P86 Natural Resources Management Plan. Emmons & Olivier Resources. July 19, 2002.
The goal of this Natural Resources Management Plan is to develop an ecologically-based management approach that improves, protects and maintains the ecological functions of CDP-86. This natural depression is a link in the Greenway Corridor. The CDP-86 area provides the critical connection between the City of Woodbury’s trunk stormwater system and a natural drainageway through Cottage Grove that discharges into the Mississippi River. The plan establishes a framework for future restoration efforts on portions of the site including areas both inside and outside of the conservation easement.
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Draft Comprehensive Wetland Management Plan. Emmons & Olivier Resources, 2002.
The draft comprehensive wetland management plan provides an inventory, functional assessment, and management classifications for all know wetlands within the watershed. There are also specific management standards such as stormwater susceptibility and stormwater protection standards for protecting these wetlands. This wetland management plan assists the administration of the Wetland Conservation Act and designates wetland restoration/enhancements opportunities.
Download Report (6.1mb)
Projects by Type:
Hydrologic/Hydraulic | Infiltration | Monitoring | Natural Resource Management