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May 4, 2018
City of Orono
Attn: Jeremy Barnhart
2750 Kelley Parkway
Orono, MN 55356
RE: Final Plat Application
Southways Addition
Engineering Review #1
Dear Jeremy:
As requested, I have completed an engineering review of the documents submitted for the above
referenced project. In addition, Adam Edwards has provided comments for inclusion with this review.
We offer the following observations, comments, and recommendations for your consideration:
1.The condition of Bracketts Point Road to remain should be reviewed by the City and Contractor
prior to any work, and the existing condition should be documented with pictures. After
completion of work, the street should be reviewed for damage, and the Contractor should be
required to repair any damage deemed to be caused by site work.
2.Work within public right-of-way must be coordinated with the Public Works Department.
Contractor must provide a minimum 48 hour notice prior to any work being performed. Notes
should be revised accordingly.
3.The proposed lift station will require a minimum of 20’ radius of permanent easement centered
on the lift station. If the station location is shifted, a working area for the valve vault will need
to be maintained as well. The proposed grading will need to be revised to accommodate the
concrete generator pad (elevation of 937.0 sloped away from the station at 2%) and
screening. The last 20’ of pipe prior to the station will need to be ductile iron. The Engineer’s
Estimate should include $150,000 for the work associated with the lift station construction as
part of the Developer’s responsibility. A sketch has been included with this letter to aid in
layout of proposed facilities.
4.The applicant will be required to obtain Minnehaha Creek Watershed District (MCWD)
approval and permitting. A copy of any approvals or permits required should be submitted
prior to Final Plat approval.
5.The applicant will be required to obtain a General Construction Permit (NPDES) to discharge
stormwater associated with construction activity since more than 1 acre will be disturbed. A
copy of the permit should be submitted prior to any land disturbing activity.
6.The applicant will be required to obtain a Sanitary Sewer Extension permit from the Minnesota
Pollution Control Agency. A final copy of the permit should be submitted prior to
construction.
7.The applicant will be required to submit a Maintenance Agreement for all stormwater
management structures and facilities. The agreement should define maintenance
responsibilities following completion of project, specify types and frequencies of inspection
and maintenance activities, designate who will conduct inspection and maintenance activities,
and outline reporting requirements.
Final Plat Application
Southways Addition
Page 2
H:\ORNO\C13115486\z-18-3999_Brackets Point\Southways_FinalPlatReview-1_2018-05-04.docx
8.Clear drive lanes must be maintained on Brackets Point Road during construction. The
Contractor will have to exercise care during mobilization of equipment to not block traffic, and
parking for construction workers should be restricted to on-site only. The Contractor should
submit a Traffic Control Plan prior to any work. Access must be maintained to properties south
of site at all times. Plan should be approved by Fire Department and/or applicable emergency
services.
9.A final estimated cost of proposed improvements, matching approved plans, must be submitted
in order to determine the total Letter of Credit (LOC) amount. The LOC must be written to
150% of cost of improvements and submitted prior to any land disturbing activities. Estimated
costs should include grading, erosion control, utilities, street construction, vegetation
management, buffer establishment, temporary stabilization, and final stabilization.
10.Development grading, including the storm ponds and drainage ways, should be completed prior
to acceptance of the development and release of the escrow. In addition, a copy of MCWD
approval for the Stormwater Management system should be submitted prior to issuing any
Certificates of Occupancy.
11.Record drawings must be submitted upon completion of the project.
12.City details should be revised to include the most current versions. Bolton & Menk will
forward the current details directly to the applicant’s Engineer (Gronberg & Associates).
13.A detail of the infiltration trench should be added to the plans to ensure it is constructed as
proposed.
14.Drainage and Utility Easements should be revised as follows:
a.Over all stormwater management facilities used to meet regulatory requirements.
Easements should be provided for the infiltration trench located on Lots 1 and 3, Block 1
accordingly.
b.All swales and storm sewer providing drainage for multiple properties. Easement should
be provided for the swale located across Lots 1 and 2, Block 1 accordingly.
15.A Final Landscape should be submitted for review. The plan should include the following:
a.Types and locations of proposed restoration.
b.Abandoned road should indicate removal of pavement and restoration type.
c.De-compaction of existing soils under removed impervious surfaces with 12” ripping depth
prior to placement of topsoil.
d.Areas disturbed by sanitary manhole removal.
e.Restoration of the existing rain garden at the south street connection.
f.Trees should be located so as not to interfere with drainage. In rural section areas, trees
may need to be placed outside the right-of-way.
If you have any questions or comments, please contact me to discuss.
Sincerely,
Bolton & Menk, Inc.
Robert E. Bean, Jr., P.E.
Water Resources Engineer
CC: Adam Edwards, City of Orono