ITEM 3.3_attachment��Halcanson
IlAnderson
ENGINEERING REVIEW
Residential Subdivision
for the City of Otsego
by
Hakanson Anderson
Review No. 1
Submitted to:
Honorable Mayor and City Council
cc:
Adam Flaherty, City Administrator
Tami Loff, City Clerk
Dan Licht, City Planner
Andy MacArthur, City Attorney
Jeff Bensinger, Benzinger Properties
Todd W. McLouth, P.E. Loucks Associates
Reviewed by:
Ronald J. Wagner, P.E.
Brent M. Larson, P.E.
Date:
May 31, 2017
Proposed
Development:
Crimson Ponds 4th Addition
Street Location
A portion of the S''/z of the NE 1/4 of S28, R23, T121
of Property:
east of Odean Avenue NE and north of 75th Street.
Applicant:
Jeff Benzinger
Developer:
Benzinger Properties, Inc
21301 County Road 81
Rogers, MN 55374
Owners of Record:
Thomas R Corbin Rev Trust
517 Evergreen Circle
Big Lake, MN 55309
Purpose:
Crimson Ponds West 4th Addition is a 23.76 acre proposed 64 lot
single-family residential development within Outlot A of Crimson
Ponds West 2nd Addition plat 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), and
(but not limited to) Minnesota Pollution Control Agency (sanitary sewer)
TABLE OF CONTENTS
INFORMATION AVAILIBLE
FINAL PLAT
CONSTRUCTION PLANS
TITLE SHEET
EXISTING CONDITIONS
GRADING PLAN
SWPP PLAN
OVERALL UTILITY PLAN
SANITARY SEWER AND WATERMAIN PLAN AND PROFILES
STREET PLAN AND PROFILES
STORM SEWER PLAN AND PROFILES
DETAILS
DEVELOPMENT PLAN
HYDROLOGY/S TORMWATER
OTHER CONSIDERATIONS
SUMMARY AND/OR RECOMMENDATION
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INFORMATION AVAILABLE
Final Plat for Crimson Ponds West 4th Addition, received 5/10/17, by Loucks Associates
Construction and Grading Plans for Crimson Ponds West 4th Addition, dated 5/19/17, by Loucks
Associates
ALTA/NSPS Land Title Survey for Crimson Ponds West 4th Addition, dated 5/1/17, by Loucks
Associates
Storm Sewer Design and Inlet Spread Calculations for Crimson Ponds West 4th Addition, date
5/10/17, by Loucks Associates
Specifications for Plans Crimson Ponds West 4th Addition, date May 2017, by Loucks Associates
Soil Borings for Crimson Ponds West, date November 1997, by Loucks Associates
Previous Crimson Ponds West Additions
Hydrology Report for Crimson Ponds West, 2/1/06 revision, by Loucks Associates
Storm Sewer Design for Crimson Ponds West, 4/12/06 revision, by Loucks Associates
Geotechnical Report for Crimson Ponds West, prepared 12/1/97, by GME Consultants, Inc.
Wetland Delineation Report for Crimson Ponds North & West, 3/14/05, by Kjolhaug
Environmental Services Company, Inc.
Additional Information
Minnesota Rules, Chapter 4410 — EAW Requirement
Trunk Stormwater Facilities Study for Portions of the Otsego Creels Watershed
City of Otsego Engineering Manual
City of Otsego Zoning and Subdivision Ordinances
National Wetland Inventory Map
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FINAL PLAT
1) Drainage and utility easements are needed to cover cross drainage in the rear yards of Lots 2-
4, Block 5 and Lots 3 &4, Block 6 and across the rear corners of Lots 4 & 5, Block 2.
2) 10' wide drainage and utility easement (from center of pipe) is needed to cover the storm
sewer crossing in the NE corner of Lot 5, Block 3.
CONSTRUCTION PLANS
Title Sheet (Sheet CO -1)
1) Provide north arrow.
Existing Conditions (Sheet C1-1
2) Existing zoning classifications for land in and abutting the subdivision shall be provided.
3) Total area of the proposed plat shall be provided.
4) Boundary lines of adjoining unsubdivided or subdivided land, identified by name and
ownership within 150' shall be provided.
5) 100 -year flood elevations shall be provided.
Site Plan (Sheet C2-1)
6) Plans have overlapping text on many sheets making the information difficult to read.
7) The house pads shall not be shown to extend beyond the building setback lines or into
easements.
Gradin Plan Sheet C3-1)
8) All garage elevations shall be a minimum of 18" above the adjacent curb. This results in
minimum driveway slopes of 4.16% for lots without sidewalk and approximately 4.6% for
lots with sidewalk. Many driveways do not meet these minimums and are assumed to not
meet the minimum 18" requirement.
9) The Emergency Overflow (EOF) along the north property line of Lot 5, Block 3 shall be
called out.
10) The low openings for Lots 10-13, Block 2 shall be a minimum 1.5' above the EOF of 921.5.
The EOF identified near the curb between Lots 12 & 13, Block 2 is incorrect according toe
the spot elevations.
11) Proposed lot corner elevations shall be provided for all lots.
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SWPP Plan (Sheet C3-2 to C3-3)
12) No Comment.
Overall Utility Plan (Sheet C4-0)
13) The sanitary sewer services for Lots 6 & 9-11, Block 4 and Lot 2-4, Block shall be
downstream of the water services.
14) The sanitary sewer services shall not have any bends shown to the right of way.
15) Hydrant coverage of Lots 3&4, Block 6 is insufficient. We suggest moving the hydrant in
the NE corner of Ogden Ave and 77th Street to the NW corner to provide coverage.
16) A water valve shall be added to the watermain at approximately Lot 4, Block 2.
Sanitary Sewer and Watermain (Sheets C4-1 to C4-3)
17) The storm sewer pipe (not just crossings) shall be shown in the profiles.
18) It shall be verified that the services to Lots 13 & 14, Block 2 and Lots 9-11, Block 4 have a
minimum 24" of separation from the storm sewer or provide a minimum of 12" separation with
4" of insulation at these crossings.
19) The HDPE pipe under Odean Avenue shall have inside diameters meeting or exceeding those
shown in the plans.
20) The hydrant at the east end of 77th Street may be salvaged and reused. A valve is needed at
this connection point to the existing watermain.
Street Plan and Profile (Sheet C5-1 to C5-2)
21) Curb radii shall be labeled at each intersection.
22) The SW radius of Ogden Avenue and Odell Lane appears to have a grade of 0.38%. A
minimum of 0.6% is required. This also appears to be a tip -out curb and shall be labeled as
such.
23) A continues centerline grade for Odell Lane shall be provided.
24) A valley gutter is required for intersection with 1% or less grade. Valley gutters are needed
across the intersection of Odell Circle at Ogden Avenue and across 77th Street and Odean
Avenue.
25) All vertical curves shall meet the minimum K values for a 30 mph speed limit. (19 (crest) or
37 (sag)).
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26) Provide a saw cut edge at the connection point to the existing Odgen Avenue. The existing
bituminous shall have a 18" wide mill (1.5" deep) prior to the wear course being placed to
stagger the joints.
27) A vertical curve is needed at station 23+00 along 77th Street.
Storm Sewer Plan and Profile (Sheet C6-1 to C6-2)
28) The sanitary sewer and watermain (not just crossings) shall be shown in the profiles.
Details (Sheets C8-1 to C9-3)
29) No Comment
DEVELOPMENT PLAN
30) A separate development plan and lot tabulation shall be submitted.
HYDROLOGY/STORMWATER
31) Storm sewer design calculations are still under review. Comments will follow.
OTHER CONSIDERATIONS
32) No Comments.
SUMMARY AND/OR RECOMMENDATION
We recommend approval contingent on the above comments being addressed.
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