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HomeMy WebLinkAbout2.b. Brockway Environmental Assessment WorksheetCITY OF ROSEMOUNT EXECUTIVE SUMMARY FOR DISCUSSION COMMITTEE OF THE WHOLE: January 14, 2004 AGENDA ITEM: Brockway EAW AGENDA SECTION:_ PREPARED BY: Andrew J. Brotzler, P.E., City Engineer AGENDA NO.Z & ATTACHMENTS: Draft Environmental Assessment Worksheet APPROVED BY: For the proposed Brockway development, based on the density of the project, a mandatory EAW is being prepared. Attached for Council review is a draft copy of the EAW. The proposed schedule for completion and publication of the EAW is as follows: City Council Authorize Distribution February 3, 2004 Publication in EQB Monitor February 16, 2004 EAW Comment Period February 16 - March 17, 2004 City Council Determines Need for EIS April 6, 2004 At this time, Staff would like to review the draft EAW with Council and address comments or questions that you may have. 4 DRAFT ENVIRONMENTALAsSESSMENT WORKSHEET Note to preparers: This form is available at www.mnplan.state.mn.us. EAW Guidelines will be available in Spring 1999 at the web site. The Environmental Assessment Worksheet provides information about a project that may have the potential for significant environmental effects. The EAW is prepared by the Responsible Governmental Unit or its agents to determine whether an Environmental Impact Statement should be prepared. The project proposer must supply any reasonably accessible data for — but should not complete — the final worksheet. If a complete answer does not fit in the space allotted, attach additional sheets as necessary. The complete question as well as the answer must be included if the EAW is prepared electronically. Note to reviewers: Comments must be submitted to the RGU during the 30 -day comment period following notice of the EAW in the EQB Monitor. Comments should address the accuracy and completeness of information, potential impacts that warrant further investigation and the need for an EIS. Tables, Figures, and Appendices attached to the EA W. • County map showing the general location of the project • United States Geological Survey 7.5 minute, 1:24,000 scale map indicating project boundaries (photocopy acceptable) • Site plan showing all significant project and natural features TDD (for hearing and speech impaired only): (651) 282 -5332 Printed on recycled paper containing 30% fibers from paper recycled by consumers TltlE' Br{3 V�'.1 eSli dnti' �f £ Oj3113en r .� -. These items are attached in Appendix A and B. Description: The City of Rosemount has prepared an EAW for the Brockway Residential Development. This development includes construction of 86 single - family homes, three 60 -unit apartment buildings of which 1% will be senior housing, and 346 town home units, as well as a 15,000 SF of a Neighborhood Commercial area on 109 acres located south of County Road 38, and east of State Highway 3 (South Robert Trail). Contractor Property Developers Company (CPDC) is proposing a mixed use residential development consisting of 612 total units. Housing types will consist of single and multi - family residential. Several outlots are proposed on the project site. One outlot will consist of up to 15.0 acres of dedicated city park, a storm water pond, a ball field, and a trail that will be connected to a trail system. The site currently contains 109 acres of a 9 -hole golf course, club house, maintenance shed, and 500,000- square foot warehouse and former glass - manufacturing furnace room with associated paved parking and landscaped areas. Approximately 2 acres of County Road Right of Way is located on the north side of the site. Currently there is 0.94 acres of ponding on site. After construction, the site will include approximately 35 acres of lawn/landscaping and private open space, trails, and park, up to 15 acres of dedicated city park which includes a ball field, 41 acres of impervious surfaces, and 5 acres of total ponding area. It should be noted that the cover type amounts are only estimates and are subject to change as part of the plan review process. The Brockway Residential Development site is bordered on the north by County Road 38 (Bonaire Path), on the south by Connemara Trail, on the west by State Highway 3, and on the east by the Chicago, Milwaukee, St. Paul, and Pacific Railroad. The site is anticipated to be graded in several phases to install sewer and water, construct streets, and building pads. Prior to the commencement of each site grading operation, erosion control and other Best Management Practices will be implemented. The grading plan will incorporate approximately 4 additional acres of on -site ponding for storm water treatment and rate control to provide a total of approximately 5 acres of ponding. Erosion control measures will remain in place until all construction on -site is completed and the site is stabilized. Permanent erosion control measures include ponding and landscaping. The construction methods are anticipated to be the conventional earthwork methods for site grading that include earthmoving scrapers, bulldozers, backhoes, and vibratory compactors. The public utilities will also be constructed with conventional practices utilizing backhoes, bulldozers, and compactors for excavation and backfill in the utility trenches. Prior to redevelopment of this site, the existing factory and warehouse will be demolished. All associated debris from the demolition of the existing buildings will be disposed of according to state and local guidelines and requirements. Project construction is anticipated to begin in July 2004 and be completed in September 2010. The ultimate development schedule will depend on market conditions. Brockway Residential Development Environmental Assessment Rosemount, Minnesota 2 Worksheet 1/8/04 Outlots are included in the development and will contain park, storm water ponds, open space, and trails. These outlots will remain as open space and park and will not be developed in the future. Not Applicable Unit of Government Type of Application Status State MPCA MPCA Minnesota DNR Minnesota Department of Health Brockway Residential Development Rosemount, Minnesota 1/8/04 NPDES Phase I1 Storm Water To be obtained Permit Sanitary Sewer Extension Permit To be obtained Water Appropriation To be obtained, if needed Water Main Extension Permit To be obtained Environmental Assessment Worksheet The purpose of the project is to provide residential housing within the City of Rosemount. A government unit is not carrying out this project *Neighborhood commercial The Concept Development plan for the project site details the lot sizes and locations related to the ponds and open space. A copy of the plan is included in Appendix B. City/Local Met Council Met Council Dakota County Dakota County City of Rosemount/Dakota County City of Rosemount City of Rosemount City of Rosemount City of Rosemount City of Rosemount Comprehensive Guide Plan Amendment Sanitary Sewer Extension Review Pollutant Information Access Permit Platting Building Permits Site Plan Review WCA Permit Grading Permit Rezoning Approval To be obtained To be obtained To be obtained To be obtained To be completed To be obtained To be completed To be obtained, if needed To be obtained To be obtained Recent land use in the project area is a recreational 9 -hole golf course with associated clubhouse and maintenance shed and a warehouse facility. Past land use in the project area included agricultural use until the late 1950s - early 1960s. The Brockway Glass manufacturing plant and associated 500,000 SF warehouse and furnace room was established in 1964. Presently the warehouse structure is utilized by Wintz Trucking. Residential housing is located adjacent to the project site to the north and west, and a Multi - family mobile home park is located to the south. Two known potential sources of soil and ground water pollutant sites are identified by the Minnesota Pollution Control Agency's (MPCA) "What's in My Neighborhood" website and are illustrated on Figure 4 in Appendix A. These sites are classified as follows: 1. Brockway Glass Dump Site, Voluntary Investigation and Cleanup (VIC) 2. Closed Sewage Treatment Plant, Unpermitted Dump (MPCA is investigating; this area may have to be tested and remediated) A Phase I Environmental Site Assessment (ESA) Update was completed for this project in July 2003 and identified other sources of potential and existing contamination. The ESA Update stated that a LUST (Leaking Underground Storage Tank) was reported to MPCA and satisfactorily removed from the site along with another registered underground storage tank in 1998. A letter of closure regarding the LUST incident was issued by the MPCA. The ESA Update recommends a Response Action Plan (RAP) be prepared and approved by MPCA prior to initiating redevelopment activities in this site. Additionally, the ESA Update recommends incorporating a construction contingency plan to deal with removal of contaminated soil and/or groundwater if identified after removal of the 500,000 SF building and removal of any residual pollutants within the location of the LUST incident, retention ponds, and surrounding areas. TIF funding will be used to demolish and remove the existing warehouse and factory. Brockway Residential Development Environmental Assessment Rosemount, Minnesota 4 Worksheet 1/8/04 The Farmland and Natural Area Protection Plan for Dakota County illustrates the general vicinity of this site on the Generalized Land Cover map as grassland and woodland. Areas within the vicinity of Keegan Lake are classified as "Privately Owned Natural Areas" on the Dakota County Hybrid Natural Area Protection Scenario map. Information obtained from the Dakota County Environmental Management Department confirmed that the Brockway Glass Dumpsite under the VIC program was satisfactorily addressed with a Resource Conservation and Recovery Act (RCRA) cap and that the groundwater monitoring study completed for this site indicated that groundwater had not been impacted by metals from the dumpsite. Approximately 2.5 feet of clay was used to cap the site and final remedial cleanup of the site was completed in 2001. A letter of closure for this dumpsite is on file with Dakota County. Other citizen complaints received by the County include wastewater discharges and sludge disposal that were not completely investigated and resolved. These areas were identified by the County via telephone and the Phase I ESA Update as: Brockway Glass West Wastewater Lagoon Brockway Glass North Wastewater Lagoon Unpermitted Golf Facility Dump Site on the south side of property Investigation and testing of the lagoons in November 1999 identified diesel range organics (DRO) at a concentration of 5,700 ppm in the north pond (lagoon). According to the MPCA and Minnesota Department of Health, there is no threshold established in the state of Minnesota for levels of DROs, however, both agencies concur that the level of DROs found in the November 1999 sample is high. The 2003 Phase I ESA Update recognized this as an environmental condition based on the level of DROs present in the 1999 investigation and recommended this be addressed prior to redevelopment of the Brockway Property. The Phase I Update recommends that the site be entered into the MPCA VIC and VPIC programs and a Response Action Plan (RAP) be prepared and approved by appropriate MPCA staff prior to initiating redevelopment. This recommendation will be (was) discussed between the developer, MPCA, and Dakota County. The City of Rosemount 2020 Comprehensive Plan has designated the project site as a combination of Parks and Open Space, and Business Park. The area will be required to be re -zoned and re- guided to a combination of urban and high density residential to reflect the different housing types proposed in the plan as well as the small commercial site. The property is currently zoned B -P2 (Business Park -2) and PI (Public Institutional) and will be re -zoned to a combination of R -1, R -2, R -3, and Cl The proposed density and re- zoning will be reviewed by the City as part of the plan approval process. Several of the proposed single family home units will be located adjacent to the active railroad that borders the site on the east - southeast. This presents the potential for incompatible land uses based on the noise and visual impacts associated with the railroad. Appropriate mitigative measures, such as adequate landscaping to screen the housing units from the railroad, will be required by the City. This will be reviewed as part of the plan approval process. Williams Pipeline Company has a petroleum pipeline which extends east to west in the southern half of the property. The 100' wide pipeline easement is documented as #637707. The project plan and illustrates the approximate location of the pipeline within the project site and proposes to locate the trail along this easement. Northern States Power Company has a 50' wide easement documented as #972787 and located on the north east side of the site. A copy of the site plan is included in Appendix B. The power line and gas line easements are also illustrated on the Well Location Map (Figure 5) in Appendix A. Brockway Residential Development Environmental Assessment Rosemount, Minnesota 5 Worksheet 1/8/04 The wildlife on this site is a result of the plant communities present. The three prominent plant communities on and adjacent to the project site include wetlands and ponds, wooded/forested and grassland areas, and sodded turf (golf greens). Ponds /Wetlands The City of Rosemount's Comprehensive Wetland Management Plan identifies two Manage Il wetlands and one Utilize wetland located within the property boundaries. The Manage II wetlands provide some functions for vegetative diversity and wildlife habitat with high functions for water quality protection and flood attenuation. An aerial photo review of the site was performed to determine if the ponds were constructed. Aerial photos between 1940 and 2001 were reviewed. In all years reviewed, the pond located on the north boundary of the site was present. Review of the ponds located on the southwest boundary of the site was inconclusive due to the amount of trees present in this area. Historical accounting of these ponds with previous property owners indicates that they have been used as stormwater and effluent treatment ponds since the late 1950s / early 1960s when the glass factory was constructed. The classification of these wetlands will be evaluated by the City as part of the review process of the proposed development plan. The City's Wetland Management Plan requires sediment pretreatment for Manage II wetlands. The Utilize wetland has the highest functions as a water quality protection and flood attenuation wetland. It does not generally provide high quality wildlife habitat. The City's Wetland Management Plan does not require treatment for Utilize wetlands. Wooded/Forest and Grassland/Brush The wooded and grassland/brush areas are found in the southwest and southeast corners of the property. The dominant species within the tree strata is oak, pine, and Russian olive. These species provide an ecological function to the area by reducing the impact of soil erosion and by providing cover for deer and other wildlife. However, the tree stratum does not function as a significant ecological corridor for most wildlife since it is relatively small and Connemara Trail abuts this area to the south and Highway 3 to the west. The development plan has identified park and open space in the wooded areas of the site and many of the existing trees are not anticipated to be removed from the southwest corner of the site. Wildlife Wildlife typical of wooded areas includes white- tailed deer, geese, pheasants, ducks, rabbits, birds, turtles, frogs, gophers, chipmunks, mice, raccoons, and squirrels. These animals are believed to be in the vicinity of the project site. Deer tracks were observed during the site visit in December 2003. The development plan incorporates approximately 15 acres of public park, a combination of 10 acres of private parkland, open space and trails, and a total of 5 acres of ponding. These areas will provide habitat and corridors for wildlife adapted to living in urban settings. Brockway Residential Development Environmental Assessment Rosemount, Minnesota 6 Worksheet 1/8/04 Note that these areas are estimates and may change during the plan review process. *Wooded/forest, brush/grassland, and dedicated park area is included in this number Based on the DNR Natural Heritage Database and site visit, there are no known endangered or rare species on or near the site. The letter from the DNR is included in Appendix C. Figure 5 in Appendix A. This well is proposed to be permanently sealed and recorded prior to commencement of the development project. The City of Rosemount 2020 Land Use Plan Map from the 2020 Comprehensive Plan Update has designated the project site as Park/Open Space and Business Park. This area will need to be re- guided as Urban Attached residential or Moderate Density Residential (R -3). The City of Rosemount's municipal water system currently consists of two independent water systems, which operate at different elevations. One serves the urbanized, west side of the City and the other serves the more industrial, eastern portion of the City. The western system consists of four wells and two storage facilities. The eastern system consists of two wells and a recently constructed water tower. To meet increases in water demand, the two systems were connected this year in an effort to provide limited backup to the eastern system. The western pressure zone operates at a higher elevation than the eastern pressure zone. A pressure reducing station allows flow from the western zone to the eastern zone under certain conditions. The Brockway Residential project site is located in the Western pressure zone. At build -out the Western pressure zone will have an estimated maximum daily water demand of 13.5 MGD. Wells will be added to the system as required to meet the anticipated need of 13.5 MGD. Planning for a new well is underway. The new well is anticipated to be installed by February 2005 and will pump directly into the Western pressure zone. It is anticipated that the new well capacity will be approximately 1200 GPM. Additionally, a new water tower is proposed to be constructed by October 2005. Existing wells include the following: Well Number Unique Well No. Well Capacity GPM 3 211999 500 7 112212 1100 Brockway Residential Development Environmental Assessment Rosemount, Minnesota 7 Worksheet 1/8/04 Approximately 4 additional acres of on -site ponding is proposed for this project. One known well is located in the warehouse and the approximate location of the well is illustrated on 8 509060 1000 9 554248 1600 *RR 1 (10) 457167 500 *RR 2 (11) 474335 500 *Designates wells that are located in the Eastern pressure zone. Planning for the overall system, including source, treatment, storage, and distribution is discussed in the Water Supply and Distribution Plan for the City of Rosemount (September 1997). Although water treatment is not required at this time, it is anticipated that treatment may be needed or desired at a future time. The DNR water appropriation permit number is 766069. The predicted future water demands for the Brockway Residential Development were based on estimating that each residential unit will use 274 gallons /day /unit. This creates an estimated demand of 167,688 GPD for the development. The City will provide adequate water supply to meet the residential requirements and has plans underway for a new well and water tower to be completed by 2005. The project site does not fall within the FEMA 100 -year flood plain and there are no shoreland zoning districts within the vicinity of this project. No state or federally designated wild or scenic river land use district exists on the property according to the Minnesota DNR's Wild, Scenic, and Recreational Rivers' map. Not Applicable The Soil Survey of Dakota County, Minnesota (Index Map Sheets 21, 22) shows the area soils that have steep slopes and/or are highly erodible as: • Chetek Sandy Loam (155C), 8 -15 Percent Slopes • Spencer (150B), 2 -6 Percent Slopes, Potentially Highly Erodible Land The site is generally level to rolling with some hillier areas to the south where Chetek Sandy Loam is mapped. These hillier areas are planned as park and main entrance areas and will be vegetated with trees, shrubs, and grasses to prevent erosion. During construction, silt fence, on -site ponding and Best Management Practices as outlined by MPCA will be incorporated throughout all construction phases and until final site stabilization. Catch basin clean out and street sweeping as needed will be used as temporary and permanent sediment control measures. Brockway Residential Development Environmental Assessment Rosemount, Minnesota 8 Worksheet 1/8/04 Current runoff from the site is treated by approximately 0.94 acres of existing ponding. The City of Rosemount's Comprehensive Stormwater Management Plan (CSMP) provides policies for water quantity and quality once development occurs. This Plan also identifies regional storm water basins /infiltration areas for surface water management. With an increase in existing impervious surface onsite, approximately 4 acres of new ponding is proposed to be constructed to address the requirements of the City's CSMP and to provide treatment for runoff from this site. The City has plans to build a regional storm water pond west of Trunk Highway 3 that will receive runoff from this area and surrounding subwatershed areas in the near future. In the fall of 2004, Keegan Lake will outlet to a new regional pond located southeast of the site to accommodate increases to water quantity volumes. The site is proposed to drain in three directions; north to Keegan Lake, west across Trunk Highway 3, and southeast to an existing regional pond. All three of these areas are designated as regional ponding areas in the City's Stormwater Management Plan. Drainage to Keegan Lake will meet or exceed Nationwide Urban Runoff Program (NURP), NPDES, and/or requirements of the City's Wetland Management Plan for rate control and pollutant removal. The storm water management plan for the site is required to limit the maximum peak storm water discharge rate to 0.05 cfs /acre for a 100 -year, 24 hour storm event by using the regional ponds and/or on -site ponding. The development will also be required to provide 1/12 of an acre - foot/acre /day of infiltration for the entire site's acreage either on -site or in the regional system. The City's Comprehensive Stormwater Management Plan requires pretreatment of storm water in accordance with NURP or NPDES guidelines prior to discharge from the site. Pretreatment prior to discharge to infiltration basins is also required. These standards are required to be met by the project design. General ponding areas are shown on the site plan in Appendix B. The City of Rosemount's Comprehensive Stormwater Management Plan outlines storm water discharge directions and locations. Onsite ponding will be required to provide rate control. The majority of the storm water from the southern half of the site will be directed into a regional pond located southeast of the site. Drainage from the northern section of the site will be directed to Keegan Lake after pretreatment of runoff to NURP standards using onsite ponding. Ponding and infiltration in the north will also provide the required rate control. Drainage from the west of the site will be directed to the regional pond on the west side of Trunk Highway 3. The City of Rosemount anticipates directing stormwater runoff to the Mississippi River via a major trunk system in the near future. During the short and potentially long interim to completion of this project, the City has entered into an agreement with MCES to oversize their existing waste water effluent outfall to the Mississippi River to accommodate increased treated stormwater flows from the City. Construction of the oversized outfall is scheduled to begin in 2005. The City's Comprehensive Stormwater Management Plan outlines policies to manage stormwater runoff on an Brockway Residential Development Environmental Assessment Rosemount, Minnesota 9 Worksheet 1/8/04 interim basis. This Plan also identifies the construction of a future storm water trunk system that will direct treated storm water south and east to a regional pond and finally to the Mississippi River. The City's long -term plan is to provide this treated surface water outlet to the Mississippi River. The incorporation of the City's policies for storm water infiltration, rate control, and treatment will minimize the impact of storm water on the water quality of receiving waters within the development and downstream, both now and in the future. Wastewater will not be treated on -site. This area is in the 2010 Metropolitan Urban Service Area (MUSA) and will be served with treatment by the MCES Rosemount Wastewater Treatment Plant. Based on information received from MCES, it is anticipated that this facility has the capacity to accommodate the development of this property. The sanitary sewer flow generated by the development will be accommodated by the City of Rosemount sanitary sewer system. The Brockway Draw Trunk Sanitary Sewer Line will provide sewer connection to this development. Not Applicable Based on the information from the Dakota County Soil Survey, there are no known sink holes, shallow limestone formations, or karst conditions within the site. It is believed that groundwater in the area generally flows to the east - northeast. Information about groundwater and bedrock depths Brockway Residential Development Environmental Assessment Rosemount, Minnesota 10 Worksheet 1/8/04 Normal domestic sewage will be generated by the site and treated at the Metropolitan Council Environmental Services (MCES) Rosemount Wastewater Treatment Plant. It is estimated that this site will generate 167,688 gallons per day (GPD). The estimate assumes that each unit in the development will generate 274 GPD. came from the Geological Atlas of Dakota County, MN and the Phase I Environmental Site Assessment (ESA) Update report dated July 30, 2003. The Phase I ESA Update identified the following past and current environmental conditions onsite: • two underground storage tanks; one 500 gallon gasoline tank and one 500 gallon fuel oil tank were located at the Site and removed in 1998 when leakage from one of the tanks was discovered and reported to Minnesota Pollution Control Agency (MPCA). The MPCA investigated the Site and leakage incident and issued a letter of closure on January 7, 2002 stating their findings of satisfactory removal of the leakage source • two wastewater lagoons; one lagoon is not considered an environmental condition since it has been sampled and no contamination was found; the lagoon located in the north of the property may still contain documented contaminated sediment and is considered a recognized environmental condition based on the results of the sample analyzed in 1999 • two above ground storage tanks with no secondary containment • the presence of floor drains and an oily substance in the building indicating possible contamination underneath the building site due to leaking pipes A copy of the MPCA closure letter for removal of the underground storage tanks is located in the Phase I ESA Update report and is included in Appendix C. The Phase I ESA Update recommended that the site be entered into MPCA's VIC and VPIC program and a Response Action Plan (RAP) under the approval of MPCA to be undertaken by the project proposer in order to assure cleanup of pollutants identified onsite prior to redevelopment. It is anticipated that the above recommended remedial actions will eliminate the existing and potential contaminants identified on site to the satisfaction of Dakota County Environmental Management Department and MPCA and will minimize or eliminate and/or mitigate for any potential environmental problems associated with past land use of this site. The Soil Survey of Dakota County, Minnesota (Index Map Sheets 21,22) shows the following soils in the project area: • Antigo Silt Loam, 1 to 8 percent slopes (4913) Undulating to rolling, well drained soil. The permeability of the soil is moderate in the upper mantle and rapid in the underlying material and runoff is medium. This soil has a poor filtering capacity which may result in ground water contamination. This soil map unit is the largest unit within the property boundary. • Kennebec Variant Silt Loam (1816) Nearly level, moderately well drained soil. Kennebec has a moderate permeability. Runoff is slow to ponded. This soil has a low potential for groundwater contamination. • Chetek Sandy Loam, 8 to 15 percent slopes (155C) Rolling and hilly, somewhat excessively drained soil. The soil permeability is moderately rapid in the surface layer and rapid in the underlying layer and runoff is medium. This soil has a poor filtering capacity which may result in ground water contamination. • Kingsley Sandy Loam, 3 to 8 percent slopes (34213) Undulating to rolling, well drained. Soil permeability in the surface layer is moderate and moderately slow in the subsurface layer and runoff is medium. This soil has a low potential for ground water contamination. Brockway Residential Development Environmental Assessment Rosemount, Minnesota 11 Worksheet 1/8/04 Spencer Silt Loam, 2 to 6 percent slopes (150B) Undulating and moderately well drained. Soil permeability is moderate and runoff is medium. This soil has a low potential for ground water pollution. Kingsley - Mahtomedi- Spencer Complex, 3 to 8 percent slopes (895B) Undulating to rolling, well drained, excessively drained, and moderately drained soils. Permeability is rapid and runoff is medium. Filtering capacity is low which increases the potential for ground water contamination in the Mahtomedi soils. Urban Land (103 9) Level to gently sloping with greater than 90 percent of the surface covered with buildings, asphalt, concrete and other impervious surfaces. Runoff is high and potential for ground water contamination is low. Based on information from the Dakota County Geological Atlas, the sensitivity of the Prairie du Chien -Jordan aquifer to pollution is considered high in this area. However, the proposed residential development is not anticipated to create the potential for groundwater contamination as hazardous waste will not be present on -site. Additionally, storm water will be pretreated prior to discharge into the city storm sewer system. Any contaminated soils identified during the demolition and removal of the glass factory facility and grading of areas identified as being potential sources of pollutants will be removed or treated prior to redevelopment. Several sources of potential contamination exist on site as identified by the Phase I ESA Update completed in July 2003 for this site and are summarized as follows: • two underground storage tanks; one 500 gallon gasoline tank and one 500 gallon fuel oil tank were located at the Site and removed in 1998 when leakage from one of the tanks was discovered and reported to MPCA. The MPCA investigated the Site and leakage incident and issued a letter of closure on January 7, 2002 stating their findings of satisfactory removal of the leakage source • two wastewater lagoons; one lagoon is not considered an environmental condition since it was sampled in 1999 and no contamination was found; the lagoon located in the north of the property is considered an environmental condition based on the 1999 sampling analysis and documentation of contaminated sediment found in the pond • two above ground storage tanks with no secondary containment • the presence of floor drains and an oily substance in the building indicating possible contamination underneath the building site due to leaking pipes Brockway Residential Development Environmental Assessment Rosemount, Minnesota 12 Worksheet 1/8/04 Household municipal solid waste will be generated by this project. Municipal solid waste will be hauled away by local garbage haulers and residents will be encouraged to recycle. The Phase I ESA Update recommends implementing a Response Action Plan (RAP) under the approval of MPCA to address cleanup of any contaminated areas found on site. This will be discussed during the plan review process. Traffic Generation Land Use Size Dail ` Traffic P.M. Peak Hour Single Family 125 1,197 127 Multi - Family 487 1,795 160 Total Development 612 2,992 287 The estimated trip generation is based on information identified in the Sixth Edition of the Institute of Transportation Engineers (ITE) Trip Generation Manual. A Traffic Impact Study was prepared for the proposed Brockway Residential Development. The traffic study document is included in Appendix D. The primary impacted roadways adjacent to the site are Connemara Trail, County Road (CR) 38 (132 Street), and Trunk Highway (TH) 3. Primary access to the site will be provided via Connemara Trail and CR 38. Both Connemara Trail and CR 38 are local collector roadways. TH 3 is classified as a minor arterial. The regional impacts to TH 3 were analyzed. The results indicated that the existing (2003) intersections are operating at satisfactory levels of service, (i.e. LOS C or better). The 2008 conditions are anticipated to operate at Level of Service (LOS) E at TH 3 and Connemara Trail and CR 38 intersections, assuming no traffic control improvements. Based on this data and analysis, the proposed site traffic combined with future background traffic would have a small potential impact to the regional highway system in the future. Coordination would be required between the City, Dakota County, and Mn /DOT as traffic continues to grow on Connemara Trail and CR 38. The City has submitted a Municipal Cooperative Agreement Application for improvements to TH 3 that would include: TH 3 at Connemara Trail • Constructing a new traffic control signal system at the intersection. 2. TH 3 at CR 38 (132 nd Street) • Widen TH 3 with the additional left and right -turn lanes for northbound and southbound approaches. • Widen CR 38 westbound to include two lanes of approach with a left -turn and a through right -turn lane. 3. TH 3 at CSAH 30 (125 Street) Brockway Residential Development Environmental Assessment Rosemount, Minnesota 13 Worksheet 1/8/04 All above ground storage tanks will be removed prior to site redevelopment. Widen TH 3 with the addition of a northbound left -turn lane and southbound right -turn lane. Widen CSAH 38 eastbound to include a two -lane approach with a left -turn lane and right - turn lane. • Construct a new traffic control signal system at the intersection. 4. Access Improvements • Close the access on TH 3 to the Triangle Warehouse and Brockway Golf Course and relocate the access to CR 38. • Work with property owners on the west side of TH 3 to combine the two access points or relocate both accesses to Dodd Boulevard. If these improvements were installed, the overall intersection levels of service would improve to LOS C or better at the intersections of Connemara Trail and TH 13, and CR 30 and TH 3. The CR 38 intersection will need to be reviewed as development occurs to determine when or if a traffic signal would be justified. No stationary sources of air emissions will be constructed as part of the project. Noise Noise from construction activity is anticipated to temporarily increase. However, upon completion of construction of the site, only normal noise levels associated with a residential condition are anticipated. Dust During construction, particulate emission will temporarily increase due to generation of fugitive dust. The following dust control measures will be undertaken as necessary: Brockway Residential Development Environmental Assessment Rosemount, Minnesota 14 Worksheet 1/8/04 The proposed project will include development of approximately 612 new residential units. A carbon monoxide analysis is not required for this project. However, it is not anticipated that the state or federal guidelines would be exceeded. 1. Minimize the period and extent of area being exposed or regraded at any one time. 2. Spraying construction areas and haul roads with water, especially during periods of high wind or high levels of construction activity. 3. Minimize the use of vehicles on unpaved surfaces. 4. Covering or spraying material piles and truck loads. Odors a) According to the letter received from SHPO, there is a possibility that unreported archeological properties might be present in the project area within 500 feet of Keegan Lake and recommends completing a survey of these areas. The letter states that if the site was previously disturbed, the need for a survey would be re- evaluated. A small portion of the northeast corner of this site is within 500 feet of Keegan Lake south of County Road 3 8. It is probable that areas of this site within 500 feet of Keegan Lake were graded in the past when the golf course was constructed. Additionally, the SHPO letter states that an old rectory is located in the NW SW NE of Section 20. This site is located to the northwest and outside of the Brockway site and will not be impacted by the proposed Brockway Residential Development. A copy of this letter and a map indicating the exact location of the old rectory building is included in Appendix C. b) Based on information from the Dakota County Soil Survey the following are Prime Farmland Soils: • Antigo Silt Loam (4913) This area will be converted from golf greens /open space and industrial/warehouse to residential housing and park/open space. Construction operations will be required to meet the City's ordinances related to duration of construction activities. Brockway Residential Development Environmental Assessment Rosemount, Minnesota 15 Worksheet 1/8/04 The construction and/or operation of this project is not anticipated to involve any processes or materials that would generate any odors. This project is subject to the following City of Rosemount plans: • Comprehensive Stormwater Management Plan The storm water management for the site will be required to meet the policies of the City's Comprehensive Stormwater Management Plan. This will be addressed during the City's plan review process. • Comprehensive Wetland Management Plan Development around the wetlands is required to meet the policies in the City's Wetland Management Plan. This will be addressed during the City's plan review process. • 2020 Comprehensive Plan and Comprehensive Plan Amendment Re- guiding of the area is required for this proposed project to address the housing density and change of land use within the site. This will be addressed as part of the plan review process. A review of the Comprehensive Stormwater Management Plan, Comprehensive Wetland Management Plan, and the 2020 Comprehensive Plan was completed. The Brockway Residential Development plan will be required to meet the standards and policies in these plans. The City has concerns over whether or not the Concept Plan offers adequate parking. This issue will be addressed during the review process and final approval of the site plan. Additionally, this project is subject to review and approval by the Minnesota Pollution Control Agency since there is a documented VIC site located within the proposed development site. The 1997 Water Supply and Distribution Plan for the City of Rosemount provides information on future locations of trunk water main, treatment facilities, and storage reservoirs. The 1997 plan contains a 1.5 MG elevated reservoir near the Brockway Residential Development site. Based on the City of Rosemount's 2020 Comprehensive Plan, this 1997 water storage need has been determined to be 1.0 MG in lieu of the 1.5 MG originally planned. Water lines will be extended from the proposed 1.0 MG water storage facility and connected to the City's water distribution system that is currently in place. The City has a new well and water tower planned for completion in 2005 to accommodate growth in demand for water in this area. The City's Comprehensive Stormwater Management Plan includes regional ponding to accommodate and treat increased runoff from development in the general vicinity of this project. The Plan identifies the construction of a future storm water trunk system that will direct treated storm water south and east to a regional pond and finally to the Mississippi River. Interim use of the oversized MCES outfall proposed to begin construction in 2005 will accommodate treated runoff from the City. The City's long -term plan is to provide this surface water outlet to the Mississippi River. The incorporation of the City's policies for stormwater infiltration, rate control, and treatment will minimize the impact of storm water on the water Brockway Residential Development Environmental Assessment Rosemount, Minnesota 16 Worksheet 1/8/04 quality of receiving waters within the development and downstream, both now and in the future. Onsite ponding for treatment is proposed as part of the project plan and will be required to meet City standards. The Brockway trunk sanitary sewer line will service the Brockway Development. Sewage will be treated by the existing MCES Rosemount Wastewater Treatment Plant. Traffic volume on TH 3, Connemara Trail and CR 38 will increase. The development of the proposed project, together with adjacent development and future background traffic, will require improvements to the roadway system. These improvements include: 1. Work with Mn/DOT and the City on geometric improvements as outlined below: • TH 3 at Connemara Trail — Construct a potential new traffic control signal system at the intersection. • TH 3 at CR 38 (132 Street) — Widen TH 3 with the addition of left- and right -turn lanes for northbound and southbound approaches. Widen CR 38 westbound to include two lanes of approach with a left -turn lane and through right -turn lane. • Access Improvements — Close the access on TH 3 to the Triangle Warehouse and Brockway site and relocate the access to CR 38. Work with the property owners on the west side of TH 3 to combine the two access points or relocate both accesses to Dodd Boulevard. 2. Monitor the traffic conditions at TH 3 at CR 38 to detennine when a traffic signal system would be warranted and justified. Work with Mn/DOT and Dakota County on funding when this occurs. Money should be escrowed from the developer for the City's portion of the signal cost. 3. Improve CR 38 from the site access to TH 3 to a 44 -foot wide three -lane roadway providing left -turn lanes at the site access and TH 3. 4. Construct the site accesses to three -lane cross sections with one entry lane and two exiting lanes. The regional land use conversion from open space /park and industrial /warehouse to developed residential space is anticipated to have a cumulative impact on the area. Attempts to mitigate for this impact will include providing 25 acres of open space in the development which includes a 15 acre dedicated park, providing adequate storm water management facilities, and addressing traffic impacts. The City's current ordinances, standards, and policies are anticipated to be adequate to address these issues. No other adverse environmental impacts are anticipated to result from this project. Brockway Residential Development Environmental Assessment Rosemount, Minnesota 17 Worksheet 1/8/04 The recognized environmental impacts associated with the Brockway Residential Development project are as follows: 1. The land use will be converted from industrial, open space and park to residential: The development plans include a 15 acre public park and ball field and 10 acres of private open space area to mitigate this impact. The development also provides the opportunity to create a trail system and cleanup any existing or potential environmental conditions as recommended by the Phase I ESA Update report. 2. Sanitary sewer flows and water consumption will increase: The MCES Rosemount Wastewater Treatment Facility has adequate capacity to handle the sewage volumes from this site. The increase in water demand will be mitigated by the expansion of the City's water supply through the installation of a new well and water tower, storage, and distribution systems that are planned for completion in 2005. 3. Stormwater runoff volume will increase and runoff pollutant loads will increase: Within the development site approximately 0.94 acres of ponding/infiltration basins exist and 4 acres will be created to accommodate the increased stormwater runoff volume. The impacts related to storm water quality and quantity will be mitigated by the use of the on -site storm water treatment ponds and infiltration areas to reduce pollutant loads and provide rate control. 4. Traffic on the impacted roadways (TH 3, Connemara Trail and CR 38) will continue to increase with this proposed development, adjacent development, and general background traffic growth. As a result, several improvements will be necessary to improve the safety and operation of traffic on these roadways. These improvements are outlined in Section 28 (Impact on Infrastructure and Public Services). 5. The July 2003 Phase I ESA Update report recommends implementing a Response Action Plan (RAP) in the VIC program under the guidance and approval of MPCA to address cleanup of any contaminated areas found on site prior to redevelopment of the site. The developer will discuss this with MPCA and Dakota County. Brockway Residential Development Rosemount, Minnesota 18 Environmental Assessment Worksheet 1/8/04 RGU CERTIFICATION. I hereby certify that: The information contained in this document is accurate and complete to the best of my knowledge. The EAW describes the complete project; there are no other projects, stages or components other than those described in this document, which are related to the project as connected actions or phased actions, as defined at Minn. R. 4410.0200, subps. 9b and 60, respectively. Copies of this EAW are being sent to the entire EQB distribution list. Name and Title of Signer: Date: The format of the Environmental Assessment Worksheet was prepared by the staff of the Environmental Quality Board at Minnesota Planning. For additional information, worksheets or for EAW Guidelines, contact: Environmental Quality Board, 658 Cedar St., St. Paul, MN 55155, 651- 296 -8253, or at their Web site http : / /www. mnp 1 an. s tate . mn. us . Brockway Residential Development Environmental Assessment Rosemount, Minnesota 19 Worksheet 1/8/04 APPENDIX A General Location Map, U.S.G.S. Quad Map, Aerial Photo, MPCA "What's in My Neighborhood" Map, Existing Well Location Map WON 300 MIN MIN MIN 13 12,000 H ' 6 0 Figure 1 General Location Map Brockway Development Site Rosemount, MN A 4150 Hi9.'IW,3Y sww 3W WSB MN 5�'AZ2 `A" i`A I Ir'W' ia�� f . A y. H ' 6 0 Figure 1 General Location Map Brockway Development Site Rosemount, MN A 4150 Hi9.'IW,3Y sww 3W WSB MN 5�'AZ2 `A" i`A I Ir'W' ia�� i E ON303"1 C, �D .JCt`)IJ NVU '1Nnovasod dVVV NOU VOOI sesn 31lS 1N3NdOl3A3C1 A VAAAOO�J9 e i� �Fs » Y N011VOO ! 133t 0�3d Sf Pi # y. _« Wv rt+' : ;s 1 4 , ti 7,Jea. i ,3` f 3 0 Pi # y. _« Wv rt+' : ;s 1 4 , ti 7,Jea. i ,3` f 3 FIGURE 3 Y BROCKWAY DEVELOPMENT SITE AERIAL PHOTO ROSEMOUNT, MN 9 WSB PROJECT NO. 1556 -03 PROJECT LOCATION aYG F� A A Ir Rw LEGEND © VOLUNTARY INVESTIGATION & CLEANUP UNPERMITTED DUMP YYY Fee 0 500 1.000 2.000 Site information based on MPCA "What's in My Neighborhood" website W PROJECT LOCATION aYG F� A A Ir Rw LEGEND © VOLUNTARY INVESTIGATION & CLEANUP UNPERMITTED DUMP YYY Fee 0 500 1.000 2.000 Site information based on MPCA "What's in My Neighborhood" website 1 , i a e a + I 0*04 0 4 a- ess U I q l z 0 �v 1, ld 41 IND ji , � \�,,1 /-°� \�. �1 i as yy 4c tl l z 0 �v 1, ld 41 IND ji , � \�,,1 /-°� \�. �1 i APPENDIX C Department of Natural Resources Letter, State Historical Preservation Office Letter and Map, MPCA LUST Incident Letter of Closure Minnesota Department of Natural Resources Natural Heritage and Nongame Research Program, Box 25 500 Lafayette Road St. Paul, N4innesota 55155 - 40 Phone: (651) 296 -7863 Fax: (651) 296 -1811 E -mail sarah.hoffmann @dnr.state.mn.us December 10, 2003 Anna Brenes WSB & Associates Inc. 4150 Olson Memorial Highway, Suite 300 Minneapolis, MN 55422 � �. L- DEC 16 2003 Re: Request for Natural Heritage information for vicinity of proposed Brockway Residential Development T115N R 1 9W Section 20 & 21, Dakota County NHNRP Contact #: ERDB 20040372 Dear Ms. Brenes, The Minnesota Natural Heritage database has been reviewed to determine if any rare plant or animal species or other significant natural features are known to occur within an approximate one -mile radius of the area indicated on the map enclosed with your information request. Based on this review, there are no known occurrences of rare species or natural communities in the area searched. The Natural Heritage database is maintained by the Natural Heritage and Nongame Research Program, a unit within the Division of Ecological Services, Department of Natural Resources. It is continually updated as new information becomes available, and is the most complete source of data on Minnesota's rare or otherwise significant species, natural communities, and other natural features. Its purpose is to foster better understanding and protection of these features. Because our information is not based on a comprehensive inventory, there may be rare or otherwise significant natural features in the state that are not represented in the database. A county -by- county survey of rare natural features is now underway, and has been completed for Dakota County. Our information about natural communities is, therefore, quite thorough for that county. However, because survey work for rare plants and animals is less exhaustive, and because there has not been an on -site survey of all areas of the county, ecologically significant features for which we have no records may exist on the project area. Please be aware that review by the Natural Heritage and Nongame Research Program focuses only on rare natural features. It does not constitute review or approval by the Department of Natural Resources as a whole. If you require further information on the environmental review process for other wildlife - related issues, you may contact your Regional Environmental Assessment Ecologist, Wayne Barstad, at (651) 772 -7940. An invoice for the work completed is enclosed. You are being billed for map and database search and staff scientist review. Please forward this invoice to your Accounts Payable Department. Thank you for consulting us on this matter, and for your interest in preserving Minnesota's rare natural resources. Sincerely, ,/. ^ I I Sarah D. Hoffmann Endangered Species Environmental Review Coordinator encl: Invoice DNR Information: 651- 296 -6157 1- 888 - 646 -6367 TTY: 651- 296 -5484 1 -800- 657 -3929 An Equal Opportunity Employer Who Values Diversity � � Printed on Recycled Paper Containing a M� Minimum of 10% Post - Consumer Waste VIC O IOlU1 9ZltY'. 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WW 'SVJ V= 'Z Amnuer 301-M0 NO[Lb'Aii3SMid MOLS[H 3LdLS ,uHI30S `Iv DIH0131H vloa Tmijq 170'd 00LZTI?GR% S3LdIOOSSU 'S SSM zS:9I Pooz— S0 -Ntif £ 469Z ZZ£ [s9 3 ad uijaauj u3 lunowasoa }c A113 RV 60 60 t00Z /90 /[0 b0iR0'd OOLTT S31UIDOSSU '8 SSM 92:60 VOOZ- 90 -Ndf JAN -06 -2004 09:16 01/06/2004 09:08 AM ROPERTY ID NUMBER: EE OWNER ROPERTY ADDRESS: 13425 ROBERT TR S ROSEMOUNT MN 55068 AYABLE 2003 TAXES ET TAX: 1,826.02 PECIAL ASSESSMENTS: ODD OTAL TAX & SA: 1,826.02 AYABLE 2004 ASMNT USAGE-RESIDENTIAL )TE: Dimensions rounded to nearest foal. pyright 2004, Dakota County - is drawing is neither a legally recorded map not a survey and is not intended to be used as one. Is drawing Is a compilation of records, information and data located in various city, county, and its offices and other sources, affecting the area shown, and is to he used for reference purposes ly. Dakota County is not responsible for any inaccuracies herein contained. If discrepancies are mtl, please contact Dakota County Survey and Land Information Depart nenL WSB & ASSOCIATES 7635411700 P.02iO4 City of Rosemount Engineering Dept. 651 322 2694 2/4 SITE MAP 2003 ESTIMATED MARKET VALUES (PAYABLE 2004) LAND: LOT SIZE BUILDING: TOTAL: 234,731 TOTAL SO FT 5.39 TOTAL ACRES SCHOOL DISTRICT: 196 66,688 ROAD R/W SO FT LOCATION: S W114 NEi /4 SECTION 20- 115.19 PAYABLE 2004 HOMESTEAD STATUS: FULL HOMESTEAD WATERSHED DISTRICT: VERMILLION RIVER LAST QUALIFIED SALE: DATE: 11l�� 2003 BUILDING INFORMATION (PAYABLE 2004): TYPE jS.FAM.RES YEAR BUILT 1925 ARC"TYLE ONE STORY FOUNDATION SO FT 1052 FINISHED SO FT 1052 BEDROOMS 2 BATHS 1.5 FRAME WOOD GARAGE SO FT 400 OTHER GARAGE MISC BLDG PLAT NAME: SECTION 20 TWN 115 RANGE 19 N TAX DESCRIPTION: PT OF SW 114 OF NE 114 COM AT NW COR E 657.6 FT S 330. 5 FT W 660 FT N 330.8 FT TO BEG EX N 40 FT OF E 50 FT 004956 201t519 rp Date: January 6, 20D4 Parcels Updated: 12/11/2003 Aerial Photography: 1990 C Age ncy s pol t - Minne January 7, 2002 Mr. Scott Johnson Johnson Law Group 10801 Wayzata Boulevard, Suite 120 Minnetonka, MN 55305 RE Petroleum Tank Release Site File Closure Site: Triangle Warehouse Facility, 13500 South Robert Trail, Rosemount, Minnesota 55068 Site ID#: LEAK00012 Dear Mr. Johnson: CA staff has . We are pleased to let you know that �oMinnesota cieanup hasPollution adequately addressed the file. etroleum tank release at investi determined that your gation n PCA staff has closed the rele the site listed above. Based on the nformation relea a from or both of the 12,000 gall-on capacity i Please note that this closure apps that d removed on December 18, 1998. fuel oil underground storage additional Closure of the file means that the MPCA staff does no please b aware that file closure. fl or does not cleanup work at this time or in the foreseeable future. necessarily mean that all petroleum contami PCA nation has been sent, does not appear to pose a threat to . staff has con cl ude d e environment a under current conditions. public heal conditions. The MPCA reserves the right to reopen this file and to req for chan ed and use make addit onal work work if new information, changing regulatory r tion necessary. If you or other parties discover additional contamin 1 requires uires petr that the MPCA be immediately m ) that was not previously reported to the MPCA, Minnesota q notified. You should understand that this letter does not release any party from liability for the petroleum or any other applicable state or federal law. In contamination under Minn. Stat. ch. I I 5 (_ X000 ) addition, this letter does not release any party from liability for nonpetroleum contamination, if present, under Minn. Stat. ch. 115B (2000), the Minnesota Superfund Law. Please note that as a result of performing the requested work you may re of Tile costs you have Petroleum Tank Release Compensation Fund (Petrofund) for partial incurred in investigatina and cleaning up this petroleum tang id nd th hYlinnesota Department of is-administere by the Petroleum Tank Release Compensation Board (Petro Board) eligi r e.tv is Commerce. To learn more about who is eiigible for reimbursement- t tacPP rotund s aff at 651-297- reimbursement, and the amount of reimbursement available, ple 1119 or 1-800-63 8-0418. 520 Lafayette R Pa Dula hv�iMankato (sMarshall5- Rochester - Willmar WWW.oc state.mn.us St. Paul • Brainerd • Detr oit Lakes Equal opporiunity Employer • Printed on recycled paper containing at least 20 fibers rpm paper rec.cted ov consumers. APPENDIX D Traffic Analysis TRAFFIC IMPACT STUDY BROCKWAY DEVELOPMENT CONTRACTOR PROPERTY DEVELOPERS COMPANY FOR: CITY OF ROSEMOUNT 2875145 TH STREET WEST ROSEMOUNT, MN 55068 November 12, 2003 Prepared by: WSB & Associates, Inc. 4150 Olson Memorial Highway, Suite 300 Minneapolis, MN 55422 TRAFFIC IMPACT STUDY BROCKWAY SITE ROSEMOUNT, MN WSB PROJECT NO. 1565 -00 F: \WPWIN \1565 -00 \TRAFFIC IMPACT STUDY.doc CERTIFICATION I hereby certify that this plan, specification or report was prepared by me or under my direct supervision and that I am a duly licensed professional engineer under the laws of the State of Minnesota. Charles T. Rickart, P.E., P.T.O.E. Date: November 12, 2003 Lic. No. 26082 TRAFFIC IMPACT STUDY BROCKWAY SITE ROSEMOUNT, MN WSB PROJECT NO. 1565 -00 F: \WPWIN \1565- 0MTRAFFIC IMPACT STUDY.doc TABLE OF CONTENTS I. INTRODUCTION ................................................................................ ..............................1 II. EXISTING TRAFFIC CONDITIONS .............................................. ..............................3 III. SITE TRAFFIC CHAR. ACTERISTICS ............................................ ..............................4 IV. PROPOSED ROADWAY IMPROVEMENTS ................................. ..............................6 V. TRAFFIC IMPACT ANALYSIS ....................................................... ..............................8 VI. SITE ACCESS ..................................................................................... .............................12 VII. CONCLUSIONS/RECOMMENDATIONS ..................................... .............................13 APPENDICES TRAFFIC IMPACT STUDY BROCKWAY SITE ROSEMOUNT,MN WSB PROJECT NO. 1565 -00 F: \WPWIN \1565 -00 \TRAFFIC IMPACT STUDY.doc I. INTRODUCTION Contractor Property Developers Company plans to construct a residential development in the City of Rosemount, MN. The site of the proposed development is bounded by Trunk Highway (TH) 3 on the west, County Road (CR) 38 on the north, Connemara Trail on the south and the Chicago, Milwaukee, St. Paul, and Pacific Railroad on the east. Access to this site will be provided via one full access driveway to CR 38 and one full access driveway to Connemara Trail, with a site circulation roadway within the site. Figure 1 in the Appendix shows the proposed site plan. The City of Rosemount requested that a Traffic Impact Study be prepared to determine what impact the proposed development might have on traffic operations and what site access improvements may be necessary to safely and efficiently accommodate both site and non -site traffic. In order to thoroughly evaluate this impact, the following tasks were undertaken: 1. Meet with the City of Rosemount and the developer to discuss the perimeters of the development. 2. Where traffic data was lacking or out of date, conduct traffic counts at key intersections. 3. Using existing traffic volume data and appropriate factors, future background (non -site) traffic volumes were projected for the Design Year 2008 (estimated year of full development) for the A.M. peak hour (7:00 to 8:00 a.m.) and P.M. peak hour (5:00 to 6:00 p.m.). 4. Estimate site generated traffic volumes. This estimate will be based on published rates in the Institute of Transportation Engineer's Traffic Generation Manual. Based on current traffic patterns, develop a directional distribution for site generated traffic. 6. Based on the derived directional distribution, assign traffic volumes to the area roadway system. 7. Combine site generated traffic volumes as assigned to the roadway system with Design Year background traffic volumes. Perform a Capacity Analysis on traffic volumes derived in Item 7 for key intersections within the site area. Based on these analyses, define site access requirements and recommend any necessary improvements. TRAFFIC IMPACT STUDY BROCKWAY SITE ROSEMOUNT, MN WSB PROJECT NO. 1565 -00 Page 1 F: \WPWIN \1565 -00 \TRAFFIC IMPACT STUDY.doc 9. Review of site circulation and access plan. The results of these analyses is a roadway and site access system capable of accommodating expected future traffic volumes. The key findings of these analyses are given in the following sections of this report. TRAFFIC IMPACT STUDY BROCKWAY SITE ROSEMOUNT, MN WSB PROJECT NO. 1565 -00 Page 2 F: \WPWIN \1565- 0DNTRAFFIC IMPACT STUDY.doc II. EXISTING TRAFFIC CONDITIONS As stated previously, the site is located east of Trunk Highway (TH) 3 between CR 38 and Connemara Trail. The site location is illustrated in Figure 2 found in the Appendix. The primary roadways expected to be served by the site are discussed below. Trunk Highway (TH) 3 is a north/south B minor arterial roadway which extends from St. Paul southerly through Rosemount into Southern Minnesota. In the vicinity of the site, TH 3 provides a two -lane cross section with one lane in each direction. At the intersection of CR 38, a northbound and southbound right -turn lane is provided. At the intersection of Connemara Trail, a left- and right -turn lane is provided both northbound and southbound. The posted speed limit on TH 3 transitions from 45 MPH to 55 MPH between Connemara Trail and CR 38. The existing average daily traffic on TH 3 in this area is approximately 12,000 vehicles per day. County Road (CR) 38 is an east/west roadway which runs from Blaine Avenue (CSAH 71) on the east to TH 3 where it jogs northerly before proceeding to the west as CSAH 38. In the vicinity of the site, CR 38 is a two -lane rural cross section with one lane in each direction. Approaching the intersection of TH 3 is a single -lane with no turn lanes. A 45 MPH speed limit is posted on this roadway. The existing average daily traffic on CR 38 is approximately 360 vehicles per day. Connemara Trail is an east/west arterial City street which extends from the Apple Valley border on the west and currently ends at Biscayne Avenue. Connemara Trail is currently under construction to cross the existing railroad tracks and ultimately connect to Blaine Avenue (CSAH 71) on the east. Currently, Connemara Trail is striped to accommodate a two -lane cross section west of TH 3 to match the two -lane cross section east of TH 3. However, the width of Connemara Trail has been constructed to accommodate a four -lane section. Ultimately, Connemara Trail will be a four -lane facility with right- and left -turn lanes at major intersections. Currently, at the intersection of TH 3, a left- and right -turn lane are provided for both eastbound and westbound. A 35 MPH speed limit is posted on Connemara Trail in the vicinity of the site. The current average daily traffic on Connemara Trail is approximately 520 vehicles per day. Existing Traffic Volumes Peak hour turning movement counts were previously conducted by WSB & Associates, Inc. on June 9 and 10, 2003. These counts were conducted from 6:00 a.m. to 9:00 a.m. and 3:00 p.m. to 6:00 p.m. Twenty -four hour directional counts were also conducted on June 9 and 10 on CR 38 and Connemara Trail. The existing A.M. peak hour and P.M. peak hour turning movement counts (Figure 3) and the average daily traffic counts (Figure 4) are included in the Appendix. TRAFFIC IMPACT STUDY BROCKWAY SITE ROSEMOUNT, MN WSB PROJECT NO. 1565 -00 Page 3 F:\WPWIN \1565 -00 \TRAFFIC IMPACT STUDY.doc III. SITE TRAFFIC CHARACTERISTICS Site Generated Traffic Volumes The proposed Brockway Site Development that will generate additional traffic consists of 91 single - family residences, 362 town homes, 60 senior condominiums, and 120 apartment units. The Institute of Transportation Engineers (ITE) Trip Generation Manual was used to calculate the A.M. and P.M. peak hour entry /exit volumes and the average daily traffic volume for the proposed development. In addition to the proposed site, additional adjacent development was assumed in the analysis. This additional development included the development of the Minea Site, Biscayne Point, and St. Joseph's Church and School. The anticipated A.M., P.M., and average daily traffic trip generation is shown in Table 1 on the following page. Site Traffic Distribution Site traffic distribution was assumed to be consistent with the existing traffic patterns. The existing A.M., P.M., and average daily traffic counts were used to determine this distribution. Figure 5 in the Appendix illustrates the overall traffic distribution for the proposed Brockway site. Projected Traffic The estimated first year of full development for the proposed site is 2008; therefore, the Traffic Impacts Analysis was conducted for that future year. The 2008 background street traffic volumes were estimate by increasing the existing peak -hour counts and average daily traffic volume by a growth factor of 2.7% per year on TH 3 and 6.5% per year on CR 38 and Connemara Trail. The higher growth rate is the result of anticipated diverted traffic from 145 Street and other adjacent developments (Bloomfield) not directly included in the traffic generation. The 2008 total traffic volume was then developed by adding the proposed site traffic together with the adjacent development traffic to the background traffic. The Existing and Projected Average Daily Traffic (Figure 4) and projected 2008 A.M. and P.M. peak hour traffic volumes for background (Figure 6) and volume total with site traffic (Figure 7) is included in the Appendix. TRAFFIC IMPACT STUDY BROCKWAY SITE ROSEMOUNT,MN WSB PROJECT NO. 1565 -00 Page 4 F:IWPWIN1l565- OOITRAFFIC IMPACT STUDY_doc Table 1 Traffic Generation Brockway Site City of Rosemount Land Use B Site Size Unit __ Average Daily Traffic Rate Trips AM Peak Hour Rate Total Trips In Out PM Peak Hour Rate Total Trips In Out Single Fami 91 3 62 60 120 Unit Un it _ Unit Unit 9.57 5. 86 3 .48 6.63 871 2,12 209 79 2,992 0.75 0.44 0.07 0.51 68 159 4 61 228 17 27 3 10 44 5 1 32 2 5 183 1.01 0.54 0.10 0.62 92 195 6 74 287 5 131 4 50 190 3 3 65 2 25 98 T ownhomes Seni Co Apartme Total Brockway Trips Adjacent Develop M_inea Si - Sing Famil Mi nea Site - Tow nhomes Biscayne Point - Sin g_ le Family St. Jo Church St. Joe S chool Total Ad Trips 1 60 2 32 10 1 9 230 _Un Unit U nit_ _100 SF Students 9.57 5.8 9.5 9.1 1.02 1 ,531 1,36 99 5 17 3 2 35 4,294 0 .75 0.4 0.75 0.72 0.29 120 10 - 7 14 6 380 30 17 20 7 3 9 114 90 85 59 6 27 267 1.0 0.5 1.0 0.6 0.26 3.48 162 1 25 — 105 13 60 464 103 8 4 67 7 2 8 289 58 41 38 6 32 175 Total Study Area Trips 7,286 608 158 450 762 479 273 IV. PROPOSED ROADWAY IMPROVEMENTS The City of Rosemount has submitted an application for Fiscal Year (F.Y.) 2005 Municipal Cooperative Agreement Funding for proposed improvements on TH 3 between Connemara Trail and CSAH 38 (125 Street). Figure 8 in the Appendix illustrates the proposed funding request. The proposed TH 3 improvements would include: 1. TH 3 at Connemara Trail ■ Construct a potential new traffic control signal system at the intersection. 2. TH 3 at CR 38 (132 " Street) ■ Widen TH 3 with the addition of left -turn and right -turn lanes for northbound and southbound approaches. ■ Widening CR 38 westbound to include two lanes of approach with a through left -turn lane to include a two -lane approach with a left -turn lane and a through right -turn lane. ■ Construct anew access on CR 38 for the Triangle Warehouse/Brockway Golf course property on the east side of TH 3. 3. TH 3 at CSAH 38 (125 Street) ■ Widen TH 3 with the addition of a northbound left-turn lane and southbound right -turn lane. ■ Widen CSAH 38 eastbound to include a two -lane approach with a left-turn lane and right -turn lane. ■ Construct a potential new traffic control signal system at the intersection. 4. Access Improvements ■ Close the access on TH 3 to the Triangle Warehouse and Brockway Golf Course and relocate the access to CR 38. ■ Work with property owners on the west side of TH 3 to combine the two access points or relocate both accesses to Dodd Boulevard. The proposed project will benefit the Trunk Highway System by eliminating and/or combining access to the corridor and providing left- and right -turn lane channelization and delineation for TH 3 traffic, thereby improving traffic safety. TRAFFIC IMPACT STUDY BROCKWAY SITE ROSEMOUNT, MN WSB PROJECT NO. 1.565 -00 — Page 6 F: \WPWIN \1565 -00 \TRAFFIC IMPACT STUDY.doc For the purposes of this traffic study, future roadway improvements should include, at a minimum, the proposed improvements as outlined in the Municipal Cooperative Agreement Application. Should Mn/DOT not participate in funding these improvements, the developer, City, and County would need to work together to determine a cost sharing alternative for funding the improvements. TRAFFIC IMPACT STUDY BROCKWAY SITE ROSEMOUNT,MN WSB PROJECT NO. 1565 -00 Page 7 F: \WPWIN \1565 -00 \TRAFFIC IMPACT STUDY.doc V. TRAFFIC IMPACT ANALYSIS Using the traffic volume derived in previous sections, capacity analyses were formed for key intersections within the study area. The analyses of signalized and unsignalized intersections were performed using the Synchro Computer Model which simulates capacity analysis techniques as described in the Transportation Research Board (TRB) Highway Capacity Manual. The ability of a highway system to accommodate expected traffic volumes is expressed in terms of Level of Service (LOS). The LOS of an intersection is based on approach delay and the amount of time the driver must wait at an intersection before proceeding. The intersections are graded A through F with A representing the least delay and F representing the greatest delay. In urbanized areas such as Rosemount, an LOS D is typically acceptable during the P.M. peak hour, although LOS C is desirable. A brief description of LOS is provided in Table 2. The LOS measures are standards set forth by the Transportation Research Board (TRB) in the Highway Capacity Manual. The results of the Capacity Analysis are shown in Table 3. The following is a brief discussion of the analysis results for each analysis year. Existing 2003 Analysis The existing capacity and LOS Analysis indicates that all intersections are currently operating at satisfactory levels of service with the current lane configurations. All movements can be accommodated with the existing geometries and traffic controls. Year 2008 Analysis Without Brockway Development/Existing Geometrics — The year 2008 Capacity and Level of Service Analysis indicates that with no roadway improvements (existing geometries) and the projected 2008 traffic volumes including the adjacent development traffic (see Table 1), the intersection of TH 3 at CR 38 would operate at LOS E during both the A.M. and P.M. peak hour. The intersection of TH 3 at Connemara Trail would be operating at LOS D in the A.M. and LOS E in the P.M. peak hour. 2. Without Brockway Development Traffic/Proposed Geometrics — The year 2008 Capacity Level of Service Analysis indicates that with the proposed geometries as part of the Municipal Cooperative Agreement funding project previously mentioned, the intersection of TH 3 at CR 38 would improve to an LOS B in the A.M. and LOS C in the P.M. peak hours as an unsignalized intersection. The intersection of TH 3 at Connemara Trail, assuming no geometric changes but TRAFFIC IMPACT STUDY BROCKWAY SITE ROSEMOUNT, MN WSB PROJECT NO. 1565 -00 Page 8 F:\WPWIN \1565 -00 \TRAFFIC IMPACT STUDY.doc improved with a traffic signal system, would improve to an LOS B in the A.M. and an LOS C in the P.M. peak hour. 3. With Brockway Site Development — Assuming the addition of the Brockway Development to the other development in the study area, and assuming the improvements outlined in the Municipal Cooperative Agreement Application, the intersection of TH 3 at CR 38 would be at an LOS D in the A.M. and LOS E in the P.M. peak hour as an unsignalized intersection. However, if this intersection would be signalized assuming the same lane geometrics, the level of service would improve to an LOS B in the A.M. peak hour and P.M. peak hour. The intersection of TH 3 at Connemara Trail would continue to operate at LOS C in the A.M. and P.M. peak hour as a signalized intersection as proposed in the Municipal Cooperative Agreement Application. The intersections of Connemara Trail at the site access and CR 38 at the site access would both be operating at LOS A as an unsignalized intersection stopping the traffic exiting the site. TRAFFIC IMPACT STUDY BROCKWAY SITE ROSEMOUNT,MN WSB PROJECT NO. 1565 -00 Page 9 F:\WPWIN \1565 -00 \TRAFFIC IMPACT STUDY.doc Table 2 Level of Service Descriptions Brockway Site City of Rosemount LEVEL OF SERVICE DESCRIPTION A FREE FLOW: speed controlled by driver's desires, speed limits, or physical roadway conditions. B STABLE FLOW: operating speeds beginning to be restricted, little or no restriction on maneuverability from other vehicles. C STABLE FLOW: speeds and maneuverability more restricted. D APPROACHING UNSTABLE FLOW: tolerable speeds can be maintained but temporary restrictions to flow cause substantial drops in speed, little freedom to maneuver, comfort and convenience are low. E UNSTABLE FLOW: volumes near capacity, speed typically in neighborhood of 30 MPH, stoppages of momentary duration, ability to maneuver severely limited. F FORCED FLOW: low - operating speeds, volume below capacity, queues formed. Table 3 Traffic Analysis Brockway Site City of Rosemount Intersection TH 3 at CR 38 Unsignalized Signalized TH 3 at Connemara Tr Unsignalized Signalized Connemara Tr at Site Access Unsignalized CR 38 at Site Access Unsignalized Existing 2003 2008 without Site 2008 with Site Existing Geometrics Proposed Geometrics AM PM AM PM AM PM AM PM A A E E B C D E B B A B D E B C C C NA NA NA NA NA NA A A NA NA NA NA NA NA A A VI. SITE ACCESS The Brockway development site access is proposed to be from two full movement accesses. One access from CR 38 and one access from Connemara Trail. Both access locations will be two -way stop sign controlled stopping the exiting movement from the proposed Brockway site. The access on CR 38 is located approximately 700 feet east of TH 3. This access point is located at a location more than an 1/8 mile east of TH 3 which provides sufficient stacking for traffic approaching TH 3 or traffic that may be turning left to go north at intersections on CR 38 across from the proposed Brockway site access. The access should be constructed to a three -lane cross section with one entering lane and two exiting lanes. The access on Connemara Trail is located approximately 1,500 feet east of TH 3. This location is more than adequate for vehicle stacking to TH 3. However, some consideration should be given to lining up the driveway with the access to the mobile home park on the south side of Connemara Trail. This access is located approximately 500 feet west of the existing railroad crossing. Although this railroad crossing is not an extremely active crossing, it should be noted that if excess delays are encountered by vehicles waiting for a train, potential backup of traffic may occur through the site access. The access should be constructed to a three -lane cross section with one entering lane and two exiting lanes. The internal site circulation is laid out well to collect and distribute traffic through the site. The proposed traffic circle in the center of the site will need to have adequate signing to familiarize drivers with its operation. TRAFFIC IMPACT STUDY BROCKWAY SITE ROSEMOUNT,MN WSB PROJECT NO. 1565 -00 Page 12 F: \WPWIN \1565 -00 \TRAFFIC IMPACT STUDY.doc VII. CONCLUSIONS /RECOMMENDATIONS Based on the results of the traffic analysis, the following conclusions can be made: ■ Intersection of TH 3 at CR 38 and TH 3 at Connemara Trail are currently operating at satisfactory levels of service (LOS C or better). ■ The proposed site is anticipated to generate 3,000 trips per day. The P.M. peak hour and A.M. peak hour trips are anticipated to be 287 and 228, respectively. ■ The adjacent development is anticipated to generate approximately 4,300 new trips per day with 380 A.M. peak hour trips and 464 P.M. peak hour trips. IN By 2008, without any geometric improvements, the intersection of TH 3 at CR 38 would be operating at LOS E during the A.M. and P.M. peak hours and the intersection of TH 3 at Connemara Trail would be operating at LOS E during the P.M. peak hour period. ■ With the addition of the improved geometrics as outlined in the Municipal Cooperative Agreement Application including left- and right -turn lanes on TH 3 at CR 38 and a signalized intersection at TH 3 and Connemara Trail, the overall LOS of both intersections would be at satisfactory levels (LOS C or better) without the proposed Brockway Development traffic. In 2008 with the proposed Brockway Development traffic, assuming the improvements as outlined in the Municipal Cooperative Agreement Application are made, the intersection of TH 3 at CR 38 would be operating at LOS E during the P.M. peak hour as an unsignalized intersection. With the installation of a traffic signal at that intersection, the overall LOS would improve to LOS B. All other intersections including the site access, intersection would be operating at LOS C or better. The location of the site accesses to CR 38 and Connemara Trail are adequate for the proposed development. The improvements, as outlined in the Municipal Cooperative Agreement Application, will be required by 2008 to accommodate the proposed site and adjacent development traffic. Even if state funding is not available, TRAFFIC IMPACT STUDY BROCKWAY SITE ROSEMOUNT, MN WSB PROJECT NO. 1565 -00 Page 13 F:\WPWIN \1555- 00\TR4FFIC IMPACT STUDY.doc the improvements will still be needed to accommodate the Brockway Development. Based on the analysis found in the study and the conclusions discussions above, the following recommendations are made: Work with Mn/DOT on securing Municipal Cooperative Agreement funding for geometric improvements on TH 3 including addition of turn lanes on TH 3 at CR 38 and the signalized intersection at Connemara Trail. Should state funding not be available, the City, County, and developer will need to work together on a cost -share agreement. 2. Monitor the traffic conditions on TH 3 at CR 38 to determine when a traffic signal system would be warranted and justified. Work with Mn/DOT and the County on funding when this occurs. Escrow money from the developer for the City's portion (25 %) of the signal costs. 3. Improve CR 38 from the site access to TH 3 to a 44 -foot three -lane roadway providing left -turn lanes at the site access and TH 3. 4. Construct the site accesses to three -lane cross sections with one entering lane and two exiting lanes. TRAFFIC IMPACT STUDY BROCKWAY SITE ROSEMOUNT,MN WSB PROJECT NO. 1565 -00 Page 14 F: \WPWIN \1565 -00 \TRAFFIC IMPACT STUDY.doc t:\01DO5- 77 \cod\ figur e2. dgn IIJ U LL, m Q Q � J 127th CT. W. > _ � Q U w Z \ Q > "?I 128th ST. Q O J U O Cr m G E S Q V ti m WAY 1 130 131st ST. W. � 2nd 132nd ST. CT. ZR 1105 - - - - pRO Q 38 eON4rF ,LR o pPCK o 1 ti W / �I Trailer Court 142nd ST. W. ` ti w m Li Q a ST. Q W. a a rd ST. LL i z > Q Q w r > w U 103 _ a Ir w z O a a a146th a ST. g W. m Y < U �� U U LOWER 147th ST. m I J UPPER 147th 5T. o w 1 148th ST. Q a Q Q U Q 5. 6 . 149th ST. ° 'U PP ER g 1 149th S r LOWER a U u li 150th ST. U 150th ST. W lz _ D a T1 15N R19W U 17 � I2 m 20 21 J 130 x x� ST. Q w � ST. 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