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Home My WebLink About2002-11-13 BRAA Memo Re Pond RoutingBonestroo v Rosene Memo Ander[ik & Associates Engineers & Architects Project Name: Kohl's Development To: Dennis Postler From: Jason Swenson Re: Analysis of Pond Flouting South of Wal -Mart Client. City of oak Park Heights File No: 55 -Gen Date: November 13, 2002 This memo summarizes a review of the information submitted by the developer's engineer for the Kohl's Development. The current proposal is to direct drainage from the Kohl's Development southwest to the existing dry pond behind veal -Mart. The pond would be expanded to accommodate the additional drainage area. The pond then drains south into the Boutwell's Landing project. This review assumed that no changes in pond HWL's are allowed in the Boutwells Landing Ponds. In order to achieve this goal, approximately 11.6 acre -feet of flood storage is required. Based on the developer's submittal, the proposed pond has 12.6 acre-feet of flood storage between elevations 946 and 944. The developer has also proposed lowering the NWL of the pond to provide additional storage. This would be preferable to keep the HWL of the pond a minimum of 2 feet below the adjacent roadway. As drawn, if the NWL is dropped to a lower elevation, the proposed pond meets flood control storage requirements. The required outlet would be an 8" orifice. Downstream ponds will see no changes in HWL's and discharge rates with the 8" orifice outlet. No significant changes in bounce duration will occur with the outlet restriction. A review of the infiltration rates used in the developer's analysis indicates an assumed infiltration rate of 1.3 inches per hour. This rate is most likely unrealistic. The BCWD used 0.25 inches /hour in the nearby Kern Center Pond, with similar soils. Other sources suggest an infiltration rate of 0.25 inches per hour for use in infiltration basins in Type B soils. In order to draw down the required volume in 72 hours with an infiltration rate of 0.25 inches per hour, the pond bottom should have an area of approximately 2.9 acres. As drawn, the pond has 2.6 acres at the NWL. The pond will likely need to be slightly increased in size to meet BCWD rules. Bonestroo, Rosene, Anderlik and Associates, Inc. 2335 West Highway 36 + St. Paul, MN 55113 + Phone: 651 - 636 -4600 + Fax: 651 - 636-1311 Memo Bonestroo c' Rosene Andertik & Associates Engineers & A rc hi tects Enclosure Bonestroo, Rosene, Anderlik and Associates, Inc. 2335 West Highway 36 + St. Paul, MN 55113 + Phone: 651 - 636 -4666 + Fax: 651 - 636 -1311 MEMORANDUM .:,- , _... .�.�. �..._ of •a•r� s•:. .. v :r _:. � ..., • ... f. > v f •J',r� "'�l'J: c; '� :'f�// •• •L.i .� .-.... � . •J :.S:v... , .; ...,Y'^'^' ' 1..F.. Wry. ... �] .. f.. � :ti: r ;i•• - z+.;� ;;,� ». .....•r . c�` �5�^ �rficC `�].- ,cli /'ati.hC,�`.r- �•'�`. w''�yr,�2 C�cEte�n/. � i$ e'/ 4deE�`. s�" V.•. �Yi.` nCvF i�iS�GJ��WtK/ flx. v{ �w�£ �" k�. '�''- ��71�:,e:N,��.'.'.��5` -' try:.'/.`. �' a�'.I r��" uc' S; H` i' �f��. �nl{ �f��H. �lk��': 31. �, �.' ��lv '��J�t- �s��«s�'s.��r'• �G?;. th":. 3rr. �.° ? '�rw�Z�:e2��:�'i�'i��'1[x.�'�' -��' '_`�,�w#z�f TO: Dennis Postler, Bonestroo FROM: Bryant Ficek, Bonestroo DATE: November l3, 2002 RE: oak Park Heights Development The Kohl's development in oak Park Heights had a recent traffic analysis completed by R.EI. That analysis showed the trip generation, trip distribution, and the roadway network both within and around the site. Based upon on review of that analysis, we offer the following comments: The Institute of Transportation Engineers (ITE) publication `Trip Generation' is recognized as an industry standard for estimating traffic generated by different developments. Based upon developments of this size and nature, the daily and pm peak hour volumes presented are consistent with traffic estimated using the ITE generation rates. In addition, the pass- by/multi-trip of 20 percent is acceptable based upon past experience with this type of development. The trip distribution presented is also reasonable with the majority of traffic to/from Trunk Highway (TH) 36 and smaller percentages to/from local roadways. The internal roads will be well served by pro osed Novak Avenue, the north -south t� connection between 60 t �' Street North and 58 Street North. The site would be further best served by an east --west connection between Norell Avenue North and oakgreen Avenue North. These internal connections will allow easy travel between developments, allow more options for entering and exiting the site, and keep internal trips off the main roadways. One concern regarding the roads around the site is the limited distance between the TH 36 and 60"' Street intersections with Norrell Avenue and TH 36 and 60 Street intersections with oakgreen Avenue. As traffic volumes continue to increase in this area, northbound vehicle queues at the TH 36 intersections could back up into the 60 Street intersections. It would be desirable to shift the 60 Street intersections with Norrell and oakgreen Avenues south to maximize the distance to the TH 36 intersections. (MnDOT is aware of traffic issues at these intersections as part of their TH 36 corridor study(s) and have developed several possible alternatives to help alleviate existing and proposed traffic volumes utilizing the frontage roads and roadways crossing TH 36). 2335 West Highway 36 ■ 5t. Paul, MN 55113 a 651- 635 °4600 * Fax: 651 - 636 -1311 Bonestroo, Rosene, Anderlik and P •fates, I an Affirmative Action /Equal Opportunity Employer and Employ coed Bonest Principals: Otto G. Bonestroo, P.E. Marvin L. Sorvala, P.E. Glenn R. Cook, P.E. R obert G. Schunicht, P.E. Jerry A. Bourdon, P.E. R o s ene Senior Consultants: Robert W. Rosene, P.E. Joseph C. Anderlik, P.E. Richard E. Turner, P.E. Susan M. Eberlin, C.P.A. A nderlik & Associate Principals: Keith A. Gordon, P.E. Robert R. Pfefferle, P.E. Richard W. Foster, P.E. David O. Loskota, P.E. Mark A. Hanson, P.E. Michael T. Rautmann, P.E. Ted K, Associates Field, P.E. Kenneth P. Anderson, P.E. Mark R. Rolfs, P.E. David A. Bonestroo, M.B.A. Sidney P. Williamson, P.E., L.S. Agnes M. Ring, M.B.A. Allan Rick Schmidt, P.E. Thomas W. Peterson, P.E. James R. Maland, P.E. Miles B. Jensen, P.E. L. Phillip Gravel ill, P.E. Engineers & Archi tects Daniel J. Edgerton, P.E. Ismael Martinez, P.E. Thomas A. Syfko, P.E. Sheldon J. Johnson Dale A. Grove, P.E. Thomas A. Roushar, P.E. Robert J. Devery, P.E. Offices: St. Paul, St. Cloud, Rochester and Willmar, MN Milwaukee, WI Chicago, 1L Website: www.bonestroo.com MEMORANDUM .:,- , _... .�.�. �..._ of •a•r� s•:. .. v :r _:. � ..., • ... f. > v f •J',r� "'�l'J: c; '� :'f�// •• •L.i .� .-.... � . •J :.S:v... , .; ...,Y'^'^' ' 1..F.. Wry. ... �] .. f.. � :ti: r ;i•• - z+.;� ;;,� ». .....•r . c�` �5�^ �rficC `�].- ,cli /'ati.hC,�`.r- �•'�`. w''�yr,�2 C�cEte�n/. � i$ e'/ 4deE�`. s�" V.•. �Yi.` nCvF i�iS�GJ��WtK/ flx. v{ �w�£ �" k�. '�''- ��71�:,e:N,��.'.'.��5` -' try:.'/.`. �' a�'.I r��" uc' S; H` i' �f��. �nl{ �f��H. �lk��': 31. �, �.' ��lv '��J�t- �s��«s�'s.��r'• �G?;. th":. 3rr. �.° ? '�rw�Z�:e2��:�'i�'i��'1[x.�'�' -��' '_`�,�w#z�f TO: Dennis Postler, Bonestroo FROM: Bryant Ficek, Bonestroo DATE: November l3, 2002 RE: oak Park Heights Development The Kohl's development in oak Park Heights had a recent traffic analysis completed by R.EI. That analysis showed the trip generation, trip distribution, and the roadway network both within and around the site. Based upon on review of that analysis, we offer the following comments: The Institute of Transportation Engineers (ITE) publication `Trip Generation' is recognized as an industry standard for estimating traffic generated by different developments. Based upon developments of this size and nature, the daily and pm peak hour volumes presented are consistent with traffic estimated using the ITE generation rates. In addition, the pass- by/multi-trip of 20 percent is acceptable based upon past experience with this type of development. The trip distribution presented is also reasonable with the majority of traffic to/from Trunk Highway (TH) 36 and smaller percentages to/from local roadways. The internal roads will be well served by pro osed Novak Avenue, the north -south t� connection between 60 t �' Street North and 58 Street North. The site would be further best served by an east --west connection between Norell Avenue North and oakgreen Avenue North. These internal connections will allow easy travel between developments, allow more options for entering and exiting the site, and keep internal trips off the main roadways. One concern regarding the roads around the site is the limited distance between the TH 36 and 60"' Street intersections with Norrell Avenue and TH 36 and 60 Street intersections with oakgreen Avenue. As traffic volumes continue to increase in this area, northbound vehicle queues at the TH 36 intersections could back up into the 60 Street intersections. It would be desirable to shift the 60 Street intersections with Norrell and oakgreen Avenues south to maximize the distance to the TH 36 intersections. (MnDOT is aware of traffic issues at these intersections as part of their TH 36 corridor study(s) and have developed several possible alternatives to help alleviate existing and proposed traffic volumes utilizing the frontage roads and roadways crossing TH 36). 2335 West Highway 36 ■ 5t. Paul, MN 55113 a 651- 635 °4600 * Fax: 651 - 636 -1311