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Home My WebLink About2002-11-26 PWD Ltr to Applicant-C ' I Y OAK. PARK'. HEIGHTS ] 416 8 oalc Park otllevard f!1 o. • P.o.3ax. 2007 # -Oak Park Heights a8 -2[3x7 •hc�ie: +5143 -4439 Fax:.65 1'439 -0574 N 26, Mr.. B rad Coats w - : - ol•dridge Group Minnesota ' 30 1 Harbor lane, Suite 20 5 Plymouth X11 N 55441 e Fie: - F rosion 'Control at Oak Park Station Sto p - VVork Order On N+evember 20, 2002 a Stop Work order was placed at oak Park Station. The _ Stop work Order reiterated the City requirement 'to submit a plan and receive approval prior,to starting. the work. This. requ�rerr�ent was presented .td you on page 4 paragraph of our November 1, 2002 letter. - 2. All construction Within the ditch must meet -the rades storm water . g flows patterns, and :configuration shower on the currently approved ;plan for future p hases of oak ` Park. Station. Detailed designs showing the prop osed changes must be submitted , a nd approved! prior to starting the changes: The appropriate approving authority .depending on the extent of the change., Some or all of the following may /f have appro a uth onty Community Develop Department, : City Administrator, City Engineer, City, Council, and Brown Creek Watershed District. The word "depending" should have'been "depends". A s of we have r at 'reeeived a* design other,than the previous de ' i n fro g p g Metro purveying, updated _November oo1, which showed a -new' or d near Memorial l p Avenue and 60 -foot wide flat bottom ditch running from 'Memorial Avenue to the existing pond. The 6o foot wide ditch is an essential part of the approval of the -oak ;Park Station development from both the watershed and the City. This' area provides Y p' water storage for the future development of oak 'ark Station. Today I received a copy of the Browns Creek Watershed District "Findin of Fact - g 1 Conclusions of -Law and Order" order #2 requires ripraping of the ditch with a 20-. foot width. 29 Riprap streambank erosion protection ire corn p liance with BC WD Rule 5.4 rust be installed by the Pen nittee in the ditch along the full length of the subject arcel, p and the ditch must be re- graded to a 20-ft. flat bottom trapezoidal shape, and . seeded with appropriate seed mix for early fall pursuant to 11vfNDOT Standards and Specifications' Section 2575, no later than 4:30 .m. December 9 2002. FIL E. COP The longterm solution to erosion in the area is the original desi n for Oak Dark g Station as shown on the plans made by Metro Surveying with a 60--foot width flat area leading to the pond. During high water events the and backs u all the w a y to p p �' Memorial Avenue and the 60-foot width is required for water storage. Tree City U.S.A. The BCWD Board Order #2 is a short-term solution for erosion control and is in minor conflict with the lon solution of the Oak Park Station development plan. If the BCWD 20-foot flat bottom ditch is centered in the area where y our drawin shows the 60-foot wide ditch, startin with a stillin basin at the outlets of the pipes under Memorial Avenue and extendin to below the normal water level of the pond then y ou would appear to have met the BCWD Order. If this ditch is properl desi and installed it have minimal interference with the future widenin of the area to 60 feet for hi water stora The final result could be the 60-foot wide area with a 20- foot wide riprap channel down the middle. As of toda the onl plan approved b the Cit of Oak Park Hei is the Metro Surve plan with the 60-foot wide ditch and pond near Memorial Avenue. If staff were presented with plans showin a minor modification to the approved plan that shows the BCWD 20-foot riprap ditch incorporated into th 60 foot wide area I would recommend to our Interim Cit Administrator, Communit Development Director and Cit En that the chan is a minor modification and enhancement of the approved plan, therefore can be approved b Staff. The plans need to show the location of the ditch bottom elevations and t cross sections showin how the riprap section fits into the 60-foot wide area. Staff will also consider an other method to achieve both the BCWD short-term re and the lon term development plan. In order to meet the BCWD's deadline of December 9, 2002 plans acceptable to Cit Staff as a minor chan to the approved plans need to be submitted immediatel If y ou have an q uestions, please contact me. Sincerel Ja E. Johnson, P.E. Public Works Director CC: Ma and Cit Council Browns Creek Water Shed District Administrator Jud Hoist, Interim Cit Administrator Mark J. Verlin Cit Attorne Kris Danielson, Communit Development Director Mitch Johnson, EOR, En for BCWD Mr. Steve Stamm, Fax 715-832-1074 Mr. Bill Rambo, Denn Hecker Automotive 500 Ford Road, Minneapolis, MN 55426