ITEM 3.1_attachmentReview No. 1
ENGINEERING REVIEW
Hakanson Residential Subdivision
Anderson for the City of Otsego
Submitted to: Honorable Mayor and City Council
cc: Adam Flaherty, Administrator
Tami Loff, City Clerk
Dan Licht, City Planner
Andy MacArthur, City Attorney
Paul Tabone, Lennar Corporation
Francis Hagen II, P.E. Westwood Professional Services, Inc.
Reviewed by: Ronald J. Wagner, P.E.
Brent M. Larson, P.E.
Date: April 26, 2017
Proposed
Development: Martin Farms 4th Addition, Phase 2
Street Location A portion of Section SE t/a of Section 25, T121, R24.
Of Property: North of 70th Street NE and West of Maciver Avenue NE
A portion of Outlot B Martin Farms 4th Addition
Applicant: Paul Tabone
Developer: Lennar Corporation
1630536 th Ave. N
Suite 600
Plymouth, MN 55446
Owners of Record: Lennar Corporation
Purpose: Martin Farms 4th Addition Phase 2 is a proposed 38 lot single-
family residential development on 18.57 + acres within Outlot B of
Martin Farms 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 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),
(but not limited to) Minnesota Pollution Control Agency (sanitary sewer), and Wright
County
TABLE OF CONTENTS
INFORMATION AVAILIBLE
COVER SHEET
EXISTING CONDITIONS
PRELIMINARY PLAT
PRELIMINARY UTILITY PLAN
STREET PROFILES
DETAILS
PRELIMINARY LANDSCAPE PLAN
SURFACE WATER MANAGEMENT
WETLANDS
OTHER CONSIDERATIONS
SUMMARY AND/OR RECOMMENDATION
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INFORMATION AVAILABLE
Preliminary Plat Plans for Martin Farms 4th Addition: Phase 2. 4/05/17 by Westwood
Professional Services, Inc.
Preliminary Plat Plans for Martin Farms 4th Addition, 6/1/16 revision, by Westwood Professional
Services, Inc.
Stormwater Management Calculations for Martin Farms West, dated June 20, 2016, by
Westwood Professional Services, Inc.
Geotechnical Report for Martin Farms West, dated 1/16/13, by Haugo Geotechnical Services
Geotechnical Report for Martin Farms, dated 1/8/03, by Northern Technologies, Inc.
Previous Plat Information
Preliminary Plat of Martin Farms, 6/16/03, by Westwood Professional Services, Inc.
As -built Construction Plans for Martin Farms, 12/16/09, by Westwood Professional Services,
Inc.
As -built Grading Plans for Martin Farms, 11/4/09, by Westwood Professional Services, Inc.
Final Storm Water Runoff Calculations for Martin Farms, dated 4/20/04 and revised 7/9/2004,
by Westwood Professional Services, Inc.
Geotechnical Report for Martin Farms, 1/8/03, by Northern Technologies, Inc.
Environmental Assessment Worksheet, June 2003, by Schoell & Madson, Inc.
Additional Information
Minnesota Rules, Chapter 4410 — EAW Requirement
City of Otsego Engineering Manual
City of Otsego Zoning and Subdivision Ordinances
National Wetland Inventory Map
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PRELIMINARY PLANS
Cover Sheet (Sheet 1)
No comments.
Existing Conditions (Plat Sheet 2)
2. The existing zoning classifications of the land abutting the subdivision are required.
3. The existing watermain sizes and sanitary sewer are not labeled.
4. Label existing street widths.
5. Label NWL and 100 -yr HWL elevations for the existing ponds and wetlands.
6. Storm water shown on 70th Street which does not exist.
7. Building, driveways and culverts shown on south side of 701h St that do not exist.
8. Some utilities are shown within Martin Farms 4th Addition that do not exist.
Preliminary Plat (Sheet 3)
9. Drainage and Utility Easements of Block 1 Lot 8 and 9 should be part of Outlot A. Any
storm ponds must be in Outlots deeded to City and not within D&U of lots.
10. 2nd line to south of delineated wetland line should be labeld 40' Principal Building
setback.
11. The street centerline information including horizontal curves shall be labeled. All
horizontal curves and tangents shall meet City of Otsego minimum lengths.
12. Cul-de- sac shall meet City of Otsego Engineering Guidelines Standard Plate 108
Preliminary Grading Drainage and Erosion Control Plan (Sheets 4)
13. Proposed culvert under Larabee Ave connecting Outlot A wetland to Outlot B wetland
shall be shown and shall be part of this project if it proceeds before the area to the north.
Preliminary Utility Plan (Sheet 5)
14. Label the water and sewer mains as proposed to the north of this area. This area is
dependent upon those utilities being installed.
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Street Profiles (Sheet 6)
15. All vertical curves shall meet the minimum design standards for a 30 mph design speed,
i.e. minimum length of 90 feet or K -values of 37 for sag curves or 19 for crest curves.
Details (Sheet 8)
16. Faircloth Skimmer Discharge System with Outlet Structure is not an approved system for
developments in Otsego. See City of Otsego Engineering Manuel for Storm Water
Standard plates
SURFACE WATER MANAGEMENT
17. Storm sewer design calculations and inlet spread calculations shall be submitted with final
plans.
18. The stormwater management calculations appear to meet all current City and NDPES
requirements for dead storage (including 2.5" NURP) and pre vs post discharge rates.
Hydraulic type "D" soils have been identified for this site therefore infiltration is not
required.
WETLANDS
19. Please submit the wetland delineation report.
OTHER CONSIDERATIONS
20. A septate development plan and separate development tabulation shall be provided. The
Lot, Block, Garage Floor Elevation, Lowest Floor Elevation, and Lowest Opening
Elevation shall be provided.
SUMMARY AND/OR RECOMMENDATION
We recommend approval contingent on the above comments being addressed.
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