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WATER RESOURCES ENGINEERING Water resources engineering addresses a wide range of contemporary issues regarding water quality and quantity. Control of storm water runoff and flooding has long been a major concern for our clients and a key service area for Bolton & Menk, Inc. Today’s storm water projects are complicated by the need to consider water quality enhancement, downstream flood impacts, wetland degradation and increasing urbanization.
WATER RESOURCES GROUP The increasing complexity of water resources projects requires more innovative, customized engineering solutions for clients. Our Water Resources Group consists of a team of our most experienced engineers who provide technical and managerial support for complicated water resources projects in all Bolton & Menk offices. Successful project completion requires highly technical design skills, thorough strategic planning and logical consensus building. As seasoned professionals, we recognize the importance of all assignments and the diversity of issues associated with them. Our Water Resources Group will remain committed to working closely with you throughout all phases of your project. It is this experience you can trust to effectively and accurately complete your water-related projects.
STORM WATER MANAGEMENT Our Water Resources Group is familiar with a wide variety of accepted storm water management models as well as many of the local methodologies adopted by municipalities and watershed districts. We routinely customize both design methods and documentation to address specific client needs, such as traditional Rational Methodology and U.S. Corps of Engineers, Soil Conservation Service or Environmental Protection Agency models. Our team works closely with you to identify the expected level of flood protection and potential project and regulatory constraints. Using extensive computer analysis, our designers review various alternatives including traditional storm sewer piping, surface drainage channels, detention basins, inlet and culvert control structures, sedimentation basins, low impact development, rain gardens and similar facilities to assist the client in selecting a storm water management system that effectively addresses the project objectives. Project involvement includes experience with the administration and public input process for several common storm water project financing methods: assessments, storm water utilities, tax districts, county and judicial drainage systems, highway/state aid system funding, and emergency grant/loan programs.
NPDES PERMIT PROGRAM We offer experienced assistance with obtaining your National Pollutant Discharge Elimination System (NPDES) permitting. The National Pollutant Discharge Elimination System (NPDES) permit program is designed to reduce adverse impacts to water quality from municipal separate storm sewer systems (MS4s) in urbanized cities, counties and other localities affecting environmentally sensitive water bodies. Among the primary focus points of the NPDES permitting process is the control of urban and construction runoff. Based on current MPCA permit requirements, affected communities and MS4s are required to develop a Storm Water Pollution Prevention Program (SWPPP) that addresses storm water management activities relative to the following six minimum control measures established as part of the NPDES process:
The SWPPP will identify Best Management Practices (BMP) to address each of the control measures and set goals and timelines for implementation of each BMP. The permit process and SWPPP represent a substantial investment by each affected community in managing its storm water-related activities. For those communities and other entities that are not explicitly affected by the MS4 permitting requirements, restrictive NPDES permit requirements are also mandated for storm water discharges due to construction activities. Construction and development sites disturbing as little as one acre are now required to submit NPDES permits. Also, new developments creating more than one acre of new impervious surface are required to include approved water quality BMPs in the site development design. We have comprehensive experience with all facets of the storm water permitting process, including storm water management planning, municipal facilities mapping and management, GIS/GPS inventories, BMP design, capital improvement planning and construction administration. We welcome the opportunity to work with you as part of your storm water management and permitting team. WATER RESOURCES SERVICES Comprehensive Stormwater Management Planning
Culvert and Waterway Analysis
Wetlands
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Marshall Stormwater Improvements
The City of Marshall has been subject to persistent surface flooding due to inadequate storm sewer and surface ditch outlets. Bolton & Menk, Inc. was employed to review the existing drainage facilities within the affected watershed and investigate alternatives for drainage relief.
A comprehensive study of the system, covering the east one-third of Marshall, was performed and included analysis of existing piping and ditches and integration of surface detention to mitigate existing flooding conditions. An integral part of the project was coordination of flood relief for Marshall with downstream County ditch system outlets. The study was completed in 1994 and the project proceeded to design phase in 1996. Bolton & Menk provided detailed design, public drainage system administration along with providing construction contract administration services. The Phase I final design included a 20-acre detention basin with 170-acre feet of storage, 3 miles of open ditch, and approximately 2600 feet of 96" and 84" interceptor storm sewer piping. Bolton & Menk also provided Phase II design services for 54" and 60" interceptor sewers. Design and construction services were coordinated from both our Fairmont and Willmar offices. Martin County CREP/CRP Wetland Restoration Project
Bolton and Menk, Inc. provided the hydrological analysis, design report, county resolution forms relative the Minnesota Ditch Law (M.S. 103E) for impoundment proceedings, design, specifications and attended County Board meetings for a large wetland restoration complex in Martin County. This project involved more than 120 acres of restored wetlands.
The key to the success of this project was ensuring that the impoundments significantly reduced the hydraulic loading on the downstream property owners. The upstream property owners also needed to be ensured that the impoundments would not back water onto their farmland. This project included working closely with the County Board, the Minnesota Board of Water and Soil Resources staff, the local SWCD representative and the affected landowners to develop final plans that satisfied of all parties. Municipal
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| 1960 Premier Drive | Mankato, MN 56001 | 507-625-4171 | FAX:507-625-4177 Web Weaver: VoyageurWeb |