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4504 Oak Chase Rd - Drainage Boundary Notice? Bonestroo ? Rosene Anderlik & ? Associates Engineers & Architects To: Russ Matthys Bonestroo, Rosene, Andadik en0 AssoNeles, fnc, is en At@rtnafive ActluMEqua! OpyaRUnity Empbyer entl Employee Owned Prtncipels: Otlo 8onestroo, P.E.. Marvin L. Sorvela, P.E. • Glenn R. Cook, P.E.. RaEert G. Schunlcht, P.E...lerry A. Baurdon, P.E. SeniorConsulfenfs.• RoEert W. Rosene, P.E.. Jaseph C. Antlarlik, P.E.. Richard E. Tumer, P.E. • Susan M. Ebernn, C.P.A. Assaiate Pnntipa/s: Howard A. SanfoM, P.E.. Keith A. Gordon, P.E. • Ro6ert R. Pfef(erle, P.E. Richerd W. Foster, P.E. • Davitl 0. Loskota, P.E. • Rohert C. Russek, A.I.A. • Mark A. Hannon, P.E.. Mlchael T, Raulmann, P.E. • Ted K. Fielq P.E. • Kenneth P. Anderson, P.E. • Mark R. Ralfs, P.E. . David A. Bo(restroo, M.B.A. • Sitlney P. Willlamson, P.E., L.S. • Agnas M. Ring, M.B.A., • Allan Rick Schmidt, P,E., •Dan Edgerton, P.E., . Ron Santrech, • Tom Peterson, P.E.,. Phil Graval, P.E., • Dale Grove, P.E., • Jim MalanO, P.E., • Shelly Johnsan, . lamael MaNnez, . hUlas Jensen, P.E., • Tom Roushar, P.E., . Tom Syiko, P.E. Olqces: St. Paul, Rocheater, Wlllmar and SI. CIOUC, MN . Mllwaukee, WI . Grayslake, IL WeASife: www.6onestroo.mm Copy: Tom Colbert From: Mark Hanson 5ubject: Bea Blomquist Storm Claim 4504 Oak Chase Road Storm of July 2000 File No. 49-00-109 Date: June 8, 2001 The property at 4504 Oak Chase Road includes a landlocked drainage basin in its backyard. The drainage boundary identified in the Preliminary Design Report (PDR) is taken from Eagan's 2' contour drawings developed in the early 1990's. The PDR did state the existing low entry elevation (918.9) is 0.1 below the 1% rainfall event (919.0). The property owner has provided correspondence which shows a reduced drainage area than that shown in the PDR. We have recalculated the 1% rainfall event based on the information provided, which is summarized below: Property Owner PDR Drainage Basin April 2001 May 2001 Low Entry Elevation 918.9 918.9 1% Rainfall Event 919.0 918.8 Our calculatians, based on limited survey work done ear{ier for the PDR, indicates a 1% rainfall event will not overfiow from Oak Chase Road into the landlocked drainage basin. However, a July 2000 storm event will overFlow. To prevent storm water overflow to the landlocked drainage basin, the PDR proposed street reconstruction in the intersection of Oak Chase Road and Oak Chase Lane. To reduce the street reconstruction proposed in the PDR, the 6oulevard areas could be re-graded by providing additionai berming to eliminate storm water overflow to this area. MAH:crw 2335 West Highway 36 • St. Paul, MIY 55113 • 651-636-4600 • Fax: 651-636-1311 - .? :. , ??J?4 ???,j .?'s?.'°?Y??F ??ti A???+?. MEMO city of eagan TO: MAYOR ANVADA CITY COUNCILMEMBERS CARI.SON & TILLEY FROb1: PUBLIC WORKS COMMITTEE MEMBERS COUNCILbIEMBERS BAKKEN & FIELDS DATE: JUNE 12, 2001 SUBJECT: PUBLIC WORKS COMMITTEE 1VIEETING/JUNE 13 A Public Works Standing Committee meeting was held on Wednesday, 7une 13, at 10:00 a.m. in the first floor conference room at City Hall. The purpose of the meeting was to meet with Bea Blomquist and hear her concems relative to drainage on her property ]ocated on Oak Chase Road. Clearly, the meeting was in response to requests by Ms. Blomquist to meet with members of the City Council to discuss these issues. Representatives of the Engineering staff, includina Director of Public Works Colbert, City Engineer Matthys, Mark Hanson of BRA&A, consulting engineering staff, and the City Administrator were in attendance at the meeting. Chairperson Bakken noted that the purpose of the meeting was to heaz any and all concems that Ms. Blomquist wished to shaze with the Committee and City Councilmembers regazding concems about drainage on her property. Chairperson Bakken also stated that the role of the Public Works Committee is to determine a common set of facts and provide information about the meeting to the City Council as a whole. The following is a summary of discussion points that were made at the meeting: • Ms. Blomquist was invited to share her questions and concerns. She stated that her questions were outlined in a letter that the City Council had received dated May 11. • There was reference made to a hand-out that City Councilmember Tilley provided the City Administrator and City Council at the Special City Council meeting held on June 12. The Ciry Administrator was asked to share a copy of Councilmember Tilley's fax with Ms. Blomquist. A copy was provided. • City Engineer Matthys described the location of catch basins on Oak Chase Road and spoke to the improper placement of a casting that occurred during the street reconstruction and further, the corrective measures that have been taken by the contractor and the City. • Mark Hanson was asked by Chairperson Bakken to refer to quesrions that have been raised by Ms. Blomquist regazding a statement that numbers in the BRA&A storm water mitigation report were incorrect. Mr. Hanson provided a good explanarion of how runoff occurs and collects on Oak Chase Road and why certain improvements were suggested in the report. • Ms. Blomquist was asked if the landscaping/grading improvements were made since the storm or if certain improvements had occurred prior to the 7uly 2000 stomi. She responded that all landscapin,,/grading improvements were made after the July 2000 storm. • There was discussion about how the Sholl's property (the neigUbor directly south of Ms. Blomquist) continues to be washed out. According to Director of Public Works Colbert, the buiiding permit for the Sholl's property identifies the drainage flowing to the southeast. There was discussion by the Committee that apparently, the drainage on the Sholl's property is not.flowing according to the approved building permit. • Ms. Blomquist was asked if she discussed runoff issues with the Sholl's. She indicated that she had not had any conversation with them. • There was more discussion by the Committee that the conflict of stormwater runoff may be more of an issue with the Sholl's. There is some possible necessity for the Sholl's to regrade their property. • Committee member Fields asked if Ms. Blomquist had sodded or seeded her property last summer/fall following the relandscaping. Ms. Blomquist responded that it was seeded by volunteers from St. John Neumann Church. • Ms. Blomquist stated that she wants a solution to the problem as outlined in her letter. • Committee Chair Bakken stated that if there is any new information that Ms. Blomquist would like to provide, she should submit it to the City and it would be disseminated to both the Committee and City Councilmembers. Summarv In conclusion, Chairperson Bakken reminded Ms. Blomquist, members of the Committee and staff that the purpose of the Public Works Committee is to gather informarion and provide a report to the City Council as a whole. This report will be forwazded to the City Councilmembers as a part of an Informative Memo process. If inembers of the City Council would like to discuss Ms. Blomquist's drainage concems at t special or a regular City Council meeting, that request should be presented to the City Administrator and Ms. Blomquist will be notified of such a meeting. It was agreed that Ms. Blomquist and the Sholl's would be noticed if such a meeting should occur. Ms. Blomquist asked for a copy of the findings of the Public Works Committee. The City Administrator will provide a mailed copy of that report when it is distributed to the City Council as a whole. The meeting ended at approximately 1030 a.m. City Administrator TLH/vmd