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HomeMy WebLinkAbout1999-01-05 MSCWMO Storm Sewer Reconstruction Rroject (excerpts) Middle St. Croix River Watershed Management Organization State of Minnesota Storm Sewer Reconstruction Project City of Bayport, Minnesota SEH No. A- MSCWM9801.00 January 19 ry 99 I hereby certify that this Report was prepared by me or under my direct 3` supervision, and that I am a ly Registered Professional Engineer under the la s of th S e f nesota. Date: January 5, 1999 Reg. No.: 16927 Reviewed by: J - Date Reviewed by: "� S � Date Short Elliott Hendrickson Inc. 3535 Vadnais Center Drive 200 SEH Center St. Paul, Minnesota 55110 (651) 490 -2000 • No dumps or landfills were observed on or immediately adjacent to the corridor. However, dumps and landfills were determined to exist 1 on and immediately adjacent to the corridor. (Please refer to the file search and historical review sections of this memo.) • Wetlands were observed on the corridor. 7 File Search A file search was conducted by Vista for sites within 1' /z miles of the corridor. One (1) solid waste facility, twelve (12) UST / AST sites, seven (7) LUST sites, nine (9) hazardous waste generators, and spill sites were identified within the specified search radii of the corridor. Some of the UST / AST sites, LUST sites, spill sites and hazardous waste generator sites are located immediately adjacent to the corridor. Thirteen (13) additional sites that were unlocatable by Vista, were determined to be on 1 or immediately adjacent to the corridor. A few of the sites identified on or immediately adjacent to the corridor are potential environmental threats to the corridor properties. Historical Review The historical review was conducted through the use of current and historical aerial photographs, fire insurance maps, topographic maps, City and County records, historical society documents, and interviews with persons familiar with the project area. In addition, the general I physiography of the corridor and adjacent properties were reviewed by SEE j Conclusions Based on the data and information collected during the completion of the ESA, the following conclusions are made regarding the environmental conditions and history of the corridor: • A former dump site (Junkers Site) is located at the west end of the corridor, immediately west of the MCF. The site consisted of a northern dump and a southern dump. The wastes in the northern dump included fly ash and (16) 55 gallon drums from an unknown I source. Only one drum contained waste product. Wastes have been removed and a storm water pond was constructed at the dump location. • The southern dump exists at the former Junker Sanitation property (now USA Waste) located approximately 0.1 miles south of the f western end of the corridor. The wastes at this dump may include demolition debris, barrels and drums, and wastes from local industries. The site has been partially covered with asphalt. The property is currently unoccupied. i Middle St. Croix River Watershed Management Organization A- MSCWM9801.00 State of Minnesota - Storm Sewer Reconstruction Project Page 19 e • • • Groundwater contamination has been documented at AC. However, the majority of the contamination is beneath existing buildings at the southern portion of the facility. The spills and contamination at the facility will not likely contaminate the properties affiliated with the corridor. • Leaking UST sites have been documented at the NSP power plant and at the MCF. These sites have received "closure" by the MPCA and do not appear to threaten the environmental integrity of the corridor properties. • No other environmental risks were observed, or identified, on or immediately adjacent to the corridor. A copy of the Phase 1 ESA is available for review at the Bayport City Hall. Two sediment samples were collected in September and October 1998, from the two ponds on the corridor. One sample (Sed -1) was collected from the NSP Pond, the second sample (Sed -3) was collected from the Andersen Pond. The samples were analyzed by a Minnesota - certified laboratory for metals, PAHs and PCBs. The results of the analyses indicated concentrations of metals and PAHs above typical background levels in both of the samples. No PCBs were detected in either sample. Traffic Impacts from Construction The traffic impacts from constructing this project do not appear to be significant. Little / No Affect Two roadways in the project area will have little or no affect from the project. The storm sewer pipe will be "jacked" under the CR 21 and TH 95. As a result, the daily traffic on these roadways will only receive minimal impact from construction traffic accessing the "jacking" sites. The determination to "jack" the pipe under these roadways was made in cooperation with Washington County and Mn/DOT. Traffic Maintained Traffic will be maintained on existing roadways unless work within the roadway requires closing the road and detouring traffic. It is anticipated that a section of Point Road will be required to be restricted to one lane for a period of time. This road is the only access to approximately 30 homes on an island. Therefore to maintain one access lane, it is anticipated that the roadway will be temporarily widened and "STOP" signs will be used to control the traffic. Middle St. Croix River Watershed Management Organization A- MSCWM9801.00 State of Minnesota - Storm Sewer Reconstruction Project Page 20