ITEM 2.2_attachmentReview No. 1
ENGINEERING REVIEW_
Hakanson Commercial Lot
for the City of Otsego
Anderson by -a
Hakanson Anderson
Submitted to: Honorable Mayor and City Council
cc: Lori Johnson, Administrator
Tami'Loff, City Clerk
Dan Licht, City Planner
Andy MacArthur, City Attorney
Steve Fischer, Arrow Companies
Todd W. McLouth, P.E., Loucks Associates
Reviewed by: Ronald J. Wagner, P.E.
Brent M. Larson, P.E.
Date: January 5, 2015
Proposed
Development: Otsego Waterfront East 5th Addition — Waterfront Commons III
Street Location A portion of the SW 1/4 of the SW 1/4 of Section 14, T121N,
of Property: R23W, East of Quantrelle Ave and South of 901h Street
Applicant: Steve Fischer
Arrow Companies
7365 Kirkwood Court N. #335
Maple Grove, MN 55369
Developer: WFC III, LLC
Owners of Record: WFC III, LLC
Purpose: Otsego Waterfiont East 5th Addition — Waterfiont Commons III is
a proposed 32,224 gross square foot 2 story office building located
on 2.29 acres of Outlot K of Otsego Waterfront East and Lot 1,
Block 1 Otsego Waterfront East 4th Addition in the City of Otsego,
Wright County, Minnesota. The proposed development will be
served with municipal water, sanitary sewer, storm sewer, and
public streets typical of an urban commercial setting.
Jurisdictional Agencies: City of Otsego, Wright County, Minnesota Department of
(but not limited to) Health, Minnesota Department of Natural Resources, Minnesota
Pollution Control Agency, Wright Soil and Water Conservation
District.
Permits Required: NPDES, Minnesota Department of Health (water), and
(but not limited to) Minnesota Pollution Control Agency (sanitary sewer)
TABLE OF CONTENTS
INFORMATION AVAILIBLE
FINAL PLAT
SCHEMATIC DESIGN SET
EXISTING CONDITIONS (C1.1)
DEMOLITION PLAN (C1.2)
SITE PLAN (C2.1)
GRADING AND DRAINAGE PLAN (C3.1)
STORM WATER POLLUTION PREVENTION PLAN (SWPPP) (C3.2 - C3.3)
UTILITY PLAN (C4.1)
DETAIL SHEET (C8.1- C8.2)
ARCHITECTUAL PLANS (A1.1 - Al 1)
LANSCAPE PLAN (L1.1 - L1.2)
HYDROLOGY/STORMWATER
SUMMARY AND/OR RECOMMENDATION
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INFORMATION AVAILABLE
Final Plat for Otsego Waterfront East 5th Addition, by Loucks Associates
Preliminary Plans for Otsego Waterfront East 5th Addition — Waterfront Commons III, 12/8/14,
by Loucks Associates
Original Otsego Waterfront East Information
Final Plat for Otsego Waterfront East
Final Plats for Otsego Waterfront East 1 st thiu 4th Additions
Hydrology Report/Storm Sewer Design for Buildings D, E, & F, 2/12/07 revision, by Metro
Land Surveying Engineering
Hydrology Report/Storm Sewer Design for Building C, 2/13/07 revision, by Metro Land
Surveying Engineering
Additional Information
Minnesota Rules, Chapter 4410 — EAW Requirement
Trunk Stormwater Facilities Study for Portions of the Otsego Creek Watershed
City of Otsego Engineering Manual
City of Otsego Zoning and Subdivision Ordinances
National Wetland Inventory Map
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PRELIMINARY PLAT
1) The preliminary plat was reviewed with the existing conditions as much of the information
required is shown on one or the other or both. Please note, no preliminary plat submittal was
received prior to final plat submittal.
FINAL PLAT
1) A 10' wide drainage and utility easement is required along the rear lot line of Lot 2, Block 1.
2) A 10' wide drainage and utility easement (5' each side of property line) is required along the
shared lot line between Lot 1 and 2.
3) A 20' wide utility easement centered over the all watermain, hydrant and hydrant leads is
required.
4) The shared parking area/drive lane is not shown within any easements. Separate
documentation will be required.
SCHEMATIC DESIGN SET
Existinsi Conditions Plan (Sheet C1.1)
1) List the benchmark(s) to be used. All elevations shall use 1929 datum.
2) (All Sheets) the benchmarks listed are using 1988 datum. All Otsego projects (i.e. Quantrelle
Avenue and 90th Street) use the 1929 NGVD datum. Please provide an equation between the
separate datum's. Verify that any existing utilities that are proposed to be connected to are
labeled with the same datum.
3) Label existing easement.
4) The following required information is missing from the existing conditions plan:
a. Label widths of existing streets not just right-of-way.
b. Identify by name and ownership, all the adjacent properties within 150' of the
boundary.
C. Provide the normal and 100 year flood elevations for the regional storm pond to
the east of the property. (NWL = 852.60 and HWL = 857.56)
Demolition Plan (Sheet C1.2)
1) See Existing Conditions Plan comment #2.
2) (All Sheets) Provide a contact name and phone number for the developer.
3) The existing hydrant proposed to be removed may be able to be salvaged and reused. A
hydrant will be needed in the NE corner of the building.
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4) The bituminous shall be saw cut in all areas where removals are required. The existing
pavement next to the new concrete shall be milled 18" wide x 1.5" deep to provide a
staggered joint for the wear course.
5) Remove the existing 12" storm sewer pipe from the existing storm manhole in the middle of
the proposed parking area. A new cored hole will be required at this manhole for the new
proposed pipe connection.
6) A portion of the curb must be removed at the south entrances in order to place pedestrian
ramps and the sidewalk.
Site Plan (Sheet C2.1)
1) Per the PUD, there is a 0' setback allowed along Quantrelle Avenue and 90th Street. For the
rest of the lot lines throughout the development the minimum parking lot setback shall be 5'.
2) It is unclear why the walk between Quantrell Avenue and the parking lot at the north
entrance is not a Handicap Accessible route.
3) Call out the concrete aprons at both entrances.
4) Pedestrian Ramps are needed at the south entrance.
5) The parking stalls not adjacent to curb and gutter shall have a minimum depth of 20'.
6) (All Sheets) Provide the normal and 100 year flood elevations for the regional storm pond to
the east of the property. (NWL = 852.60 and HWL = 857.56)
Grading Plan (Sheet C3.1)
1) See Existing Conditions Plan comment #2.
2) Label the required rim elevation adjustment at each existing storm manhole.
3) It appears that tip out curb is needed in many areas to get the runoff to designated storm
sewer. We suggest labeling these on the plans.
SWPP Plan (Sheet C3.2 — C3.3)
1) The MPCA NPDES requires volume control for all new construction prior to discharging
off-site. It is unclear how this site intends to provide storage or runoff of the 1" rainfall.
2) Inlet protection is missing from the storm manhole along the western curb line.
3) Erosion control (fiber blanket?) is required on the slope east of the bike trail at both trail
utility crossings.
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Utility Plan (Sheet C4.1)
1) Show the existing hydrants along Quantrelle Ave.
2) Hydrant coverage is insufficient. Another hydrant is needed in the NE corner of the building.
We suggest connecting to the existing watermain at the tee near the NW corner of the
building and extending the waterline to the east to provide this hydrant.
3) 900 bends are not permitted. A combination of (2) 45° bends is required.
4) How is the "Warping" the curb around the existing sanitary sewer manhole to be achieved?
We suggest a larger radius on the curb.
5) The sanitary sewer has been stubbed to the east of the existing manhole. This line shall be
extended to the east and the service from the building shall flow to this new manhole.
Details (Sheet C8.1— 8.2)
1) Provide Otsego Standard Plates. The latest version of the Otsego Engineering manual is
available at
http://www.ei.otsego.mn.us/vertical/sites/%7B5E9EA6DA-857D-4088-B3 96-
lEBOF2DBA26D%7D/uploads/Otsego_Engineering_Manual NEW 2013(1).pdf
2) All rip rap shall be articulated block or approved equal per Otsego Standard Plates.
3) The pavement section shall be per a geotechnical engineers recommendation.
Architectural Plans (Sheet A1.1 -AM)
1) No comments
Landscape Plan (Sheet L2.1 - L2.2)
1) No comments
HYDROLOGY/STORMWATER
1) The storm sewer for the Waterfront Commons III drains to the Regional Pond to the East. It
is anticipated that there is sufficient vertical fall from through the site and to the Pond for the
storm water runoff to be properly conveyed. Storm sewer and inlet spread calculations shall
be provide prior to final plan approval
SUMMARY AND/OR RECOMMENDATION
We recommend approval contingent upon the above comments being addressed.
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