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12/15/1994 - City Council Public Works Committee AGENDA Public Works Committee Meeting Thursday, 12-15-94, 6:00 P.M. Eagan Municipal Center I. Call To Order/Adopt Agenda II. Consider Authorization of Feasibility Report (West Lone Oak Road - Storm Drainage) Other Business IV. Adjourn 4 PUBLIC WORKS COMMITTEE 12-15-94 II. Project 679, Consider Authorization of Feasibility Report (West Lone Oak Road - Storm Drainage) Councilmember Awada brought to the City staff's attention a complaint and concern she had received from James and Bernice Schwab (1555 Lone Oak Road) regarding an ongoing drainage and erosion problem that they are experiencing on their property. The staff has been aware of this problem since at least 1990 and has involved Dakota County in addressing this issue. Enclosed is a topographic representation of the property in question showing the relationship of the house to the drainage from the north rural ditch section of Lone Oak Road (County Road 26). Also attached are copies of correspondence forwarded to the Schwabs from both the City and the County dated July 23 and August 1, 1990, respectively. Also enclosed is the most recent correspondence forwarded to the property owners dated July 25, 1994. This item was discussed by the City Council at their regular meetings of November 15 and December 7 with a recommendation that it be forwarded to the Public Works Committee for further review, discussion and a recommendation for Council consideration at the December 20 Council meeting. The Public Works Director and representatives from the County Highway Department will be in attendance to provide additional information to assist the Committee in their discussion of this issue. RECOMMENDATION: 1 . ,1,. ,,... . ._.. .. , r, y ,, 7\)---1 ...__ ______v? . ! i 1) • ,. , . . ! ! 1 '''.1%.'4‘: 73.4"2 ----------- ' e W. 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I 009 %1 / 1 1 � � N 0 4 / ILO .r ' 1-.-.'-*_::....._.......ssy- 1 ., .1:: A. n, Ill 0 '.:...9 •,,'S\\Ni ":".......: I:.1.17\ 0 ' VI 160 1 CL /I \ • rT leck "II / It ( •1 . -,.. )\ ' _city of aagan 3830 PILOT KNOB ROAD THOMAS EGAN EAGAN,MINNESOTA 55122-1897 Mayor PHONE:(612)454-8100 DAVID K.GUSTAFSON FAX:(612)454.8363 PAMELA McCREA TIM PAWLENTY THEODORE WACHTER Council Members July 23, 19 9 0 THOMAS HEDGES City Administrator EUGENE VAN OVERBEKE City Clerk MR JIM SCHWAB 1555 LONE OAK RD EAGAN MN 55121 Re: Lot 202, Zehnders Acres Drainage From Lone Oak Road (County Road 26) Dear Mr. Schwab: A few weeks ago, I visited with you at your property to review the drainage concerns that you have expressed over the past years . regarding the runoff from the north ditch line of County Road 26 (Lone Oak Road) . Your initial concerns pertain to the erosion and the subsequent redirecting of the runoff of the water as it leaves the west end of the culvert underneath 1539 Lone Oak Road immediately to the east of your property. As you are aware, based on your concerns, the Dakota County Highway Maintenance Department re-established the drainage line by installing several cubic yards of large "rip-rap" (boulders and stones) . This will help direct the runoff to the south side around the front your house where it can continue down towards T.H. 13. Enclosed you will find a topographic elevation map showing 2 ' contour intervals that were taken from an aerial photograph in 1966 with the lot lines and your particular house drawn in, based on legal descriptions and aerial photos. As can be seen, the natural topography has always allowed surface water runoff to discharge • primarily across your lot approximately where your house was recently built., Based on this pre-existing condition, it is an inherent responsibility of the home builder and/or new property owner to adequately protect their house from this pre-existing surface water runoff. During my site visit with you, we discussed the benefits of building a protective landscaped berm across the front of your house (south side) that would help redirect this drainage around your property during high intensity peak rainfall events. While you indicated that the individual who owned the property before you purchased it and built your home stated that they never had a previous drainage problem, it is highly unlikely that any problem would have been noticed in this heavily wooded THE LONE OAK TREE...THE SYMBOL OF STRENGTH AND GROWTH IN OUR COMMUNITY Equal Opportunity/Affirmative Action Employer Page 2 vacant area without the existence of a structure and landscaped area that is inherently affected by the types of storms that we recently experienced. You indicated a desire and need for the installation of storm sewer facilities along County Road 26 (Lone Oak Road) . Based on the scheduled Capital Improvement Programs for the City and County, it is unlikely that this type of improvement would occur within the next five years. Therefore, you may wish to investigate further the protective landscape berming that we recently discussed. Hopefully, the recent work completed by the Dakota County Highway Department will help minimize any similar future problems associated with erosion and runoff. I regret that you experienced the problems that you did with the recent rainfall and hope that the action performed by the County and the information provided by the City will help you in the future. Sincerely, Thomas A. Colbert, P.E. Director of Public Works TAC/jj cc: Bob Egan, Dakota County Maintenance Engineer Parcel File Enclosure • . . .„ . , , . DAKOTA COUNTY DAVID L.f E1ER° . PEcEivr.-:, . HIGHWAY DEPARTMENT 1612) 43t-1150 AN�o gas, 7300 WEST 1471h STREET, SUITE #402 APPI F VAN F.Y, MINNESOTA 5�>t;a P it k i,„.,,,, August 1, 1990 Mr. Jim Schwab 1555 Lone Oak Road Eagan, MN 55121 Re: Lot 202, Zehnders Acres Drainage From Lone Oak Road (County Road 26) Dear Mr. Schwab: As you requested, I once again reviewed the drainage problem at your home. The rip-rap that we installed at the end of the culvert is properly diverting the water as you requested. It was my understanding that you were to then maintain the ditch after it entered your property. The asphalt flumes that we constructed in the ditch will not increase the flow or speed of the runoff. Also from the information I have received from others, I fully agree with the contents of Tom Colbert's , July 23, 1990, letter regarding this matter. Sincerely \37\\5 k-h- ,\\\I, --T•-.>E3-i c N• Robert W. Egan, P.E. Construction/Maintenance Engineer RWE/mj1 Encl. cc: Tom Colbert Taud Hoopingarner AN EQUAL OPPORTUNITY EMPLOYER ;t. city of acigcin THOMAS EGAN Moyor July 25, 1994 PATRICIA AWADA SHAWN HUNTER SANDRA A.MASIN THEODORE WACHTER Council Members MS BERNIE SCHWAB THOMAS HEDGES 1555 LONE OAK RD city Administrator EAGAN MN 55121 E.J. VAN OVERBEKE City Clerk Re: Lot 202, Zehnders Acres Drainage From Lone Oak Road (County Road 26) Dear Ms. Schwab: Last week, you contacted me regarding your continual ongoing problems of erosion and sedimentation resulting from runoff from County Road 26 (Lone Oak Road) on the above-referenced property. I recalled your situation from several years ago and researched the file to find the enclosed letter from the City,dated July 23, 1990, and the County, dated August 1, 1990. I also had an opportunity to do a very quick review of your property and could see the areas of your concern. Due to a vacation schedule, I will not be able to meet with you and Bob Egan, of Dakota County, until the first or second week of August. However, I wanted to share with you the file information that we had and to offer some preliminary observations that can be further discussed when we meet with you at the site. My first observation is that the erosion control performed by Dakota County appears to be effective in preventing any erosion of the bank. However, the "deflection" berm that you have constructed along your south property line appears to be eroding and washing out onto your driveway and the western portion of your lawn. It appears the main problem with this runoff is the erosion and sedimentation that it creates. If your diversion berm were to be stabilized with large rip-rap type rock on top of a filter blanket, it appears you might be able to handle the drainage without any adverse impact. I hope this response provides you with some additional information to think about. If I don't contact you by August 8, please call me and I will make sure to schedule an appointment as requested. Sincerely, Thomas A. Colbert, . Director of Public Works TAC/jj cc: Bob Egan, Dakota County (W/Enc.) Parcel File Enclosure: Letter Dated July 23, 1990 MUNICIPAL CENTER THE LONE OAK TREE MAINTENANCE FACILITY 3830 PILOT KNOB ROAD THE SYMBOL OF STRENGTH AND GROWTH IN OUR COMMUNITY 3501 COACHMAN POINT EAGAN.MINNESOTA 55122-1897 EAGAN.MINNESOTA 55122 PHONE:(612)681.4600 PHONE:(612)681.4300 FAX:(612)681-4612 Equal Opportunity/Affirmative Action Employer FAX:(612)681.4360 TDD:(612)454.8535 TDD:(612)454.8535 PUBLIC WORKS COMMITTEE MEETING THURSDAY, DECEMBER 16, 1994 Following are those who were in attendance for the Public Works Committee meeting held at 6:00 p.m., on Thursday, December 16: - Ted Wachter (Chairman) Mayor Tom Egan Tom Colbert (Public Works Director) Dave Everds (County Highway Engineer) Mark Hanson (BRAA Consulting Engineer) Review Drainage Problem for 1555 Lone Oak Road (Proposed Project 679 - W. Lone Oak Road Storm Drainage) After a brief review of previous correspondence by the City and the County to the affected property owners (Jim and Bernie Schwab), Dave Everds provided polaroid photos of the drainage ditch, culverts and aerial photos further describing the location of the problem and identifying other areas of similar drainage and erosion concerns along Lone Oak Road (County Road 26). He reviewed the natural (historical)flows based on topographic contour maps and the previous efforts made by the County Highway Department to stabilize erosion on the side slope in 1990 and, most recently, placement of a bituminous shoulder along the north edge of Lone Oak Road to further stabilize any upstream erosion. The Public Works Director reviewed the historical information in the parcel file relating to the original building permit issuance including an architectural site plan (containing reference: contractor to provide positive drainage away from residence) and a topographic contour map that showed a proposed house location further to the north out of the historical drainage way. After reviewing this information, the Committee concluded that there appeared to have been a shift in the house location from the building permit reviewal to its current location in the drainage way. In response to questions regarding the proposed timing of upgrading Lone Oak Road, the Public Works Director responded that it is identified in both the County and the City's 5-Year CIP as being a "future" project with no defined year. Dave Everds indicated that the County would be receptive to a requested year by the City. 1 r• ' Chairman Wachter asked Mark Hanson various questions regarding the drainage shed and temporary versus permanent storm sewer requirements. Mark Hanson responded with various ballpark cost estimates for various scenarios that ranged from $20,000 - $60,000. Mayor Egan indicated that there appeared to be a benefit and ability to assess the costs associated with the full-fledged storm drainage project if it was built, but also recognized that it wouldn't solve the internal drainage problem that is presently being handled by the property owner's sump pump. Chairman Wachter indicated that both the temporary and permanent storm sewer options would be premature and uneconomical if done in advance of the urban upgrading of Lone Oak Road. Both Committee members Wachter and Egan then questioned what would be involved with temporary erosion control measures in lieu of a storm drainage system installation. Through a collective response by Everds, Colbert, and Hanson, it was determined that the stabilization of the side slope from the nearest upstream culvert to the bottom of the slope could cost P P P approximately$3,000 in material,with design and labor installation being provided through a concerted joint effort of City and County employees. To continue the erosion control and drainage stabilization across the Schwab's property would cost additional dollars. After a summary review of all information, the Committee recommended that the City and County jointly perform a temporary erosion control improvement from the nearest upstream culvert outlet to the bottom of the hill and offer to continue it across the Schwab's property if they are willing to pay the related expenses. Further, they indicated that if the property owners wanted to have a full-fledged storm drainage analysis done, including a permanent storm sewer system, the City should do so if the Schwabs are willing to pay the estimated $4,400, or submit a petition of more than 50% of the downstream affected property owners or of all property owners along Lone Oak Road for the proposed street upgrade. Further, this offer to perform the temporary erosion control would be subject to the property owners granting a right-of-entry to the City and County to perform such work and signing a Release of Liability to both agencies. The meeting adjourned at 7:00 p.m. Minutes prepared and submitted by, .� as �-�G►C.t..>�,Q. Director of Public Works TAC/jj 2 , ./.. , . - _ ---...1 i _,, 7 .„ , . , . z_ . ..oso• ' ( . ...,.--, ---- . , ..... , ,-- - --1. rIr7-4%ft -__.,-'L-1 -:_iiiic 1 is i) _ ���� . -•- _- r!:iT __ 1 i' — .: .. .. . . 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