HomeMy WebLinkAboutContract No. 2014-2576WSB
ASST atur«s, �,1�. Engineering ■ Planning ■ Environmental ■ Construction
April 28, 2014
Mr. Kevin Hansen
Public Works Director
City of Columbia Heights
637 - 38th Avenue NE
Columbia Heights, MN 55421
701 Xenia Avenue South
Suite 300
Minneapolis, MN 55416
Tel: 763 - 541 -4800
Fax: 763- 541 -1700
RE:Professional Services Proposal — City Library Concept Stormwater Design
Dear Mr. Hansen:
BE
I am pleased to submit this letter proposal on behalf of WSB & Associates, Inc. (WSB) to the
City of Columbia Heights (City) to complete concept stormwater alternatives evaluation for the
City Library project.
SCOPE OF SERVICES
A. Data Collection: WSB will coordinate with City staff to collect storm sewer record
plans, soil borings (upon completion), required flood storage volume calculations for
existing pond and other data as necessary.
B. Flood Storage Evaluation — We will evaluate three options for mitigating the flood
storage lost due to the proposed City Library. The existing storm sewer discharges into a
small existing pond that surcharges through storm sewer into the adjacent parking lot
during large events. With the library construction, the parking lot storage will be lost and
will need to be mitigated. The preferred option is to expand the existing pond. However,
first the City will need to confirm the parking isn't required for the property to the south.
Other potential options that will be evaluated include underground storage below the
proposed parking lot and increasing pipe capacity downstream and evaluating Jackson
Pond for capacity.
C. BMP Evaluation — In addition to flood storage mitigation the development will be
required to provide water quality BMPs to meet Mississippi Watershed Management
Organization (MWMO) requirements. WSB will evaluate three options for BMPs to
meet these requirements. The BMP design will be refined based on the proposed soil
borings. BMP locations will be focused in the green space along 44th Avenue and Van
Buren and adjacent to the existing bioretention swale on the south side of the site. The
goal is to provide maintenance friendly BMPs that meet or exceed MWMO requirements
and can fit within the aesthetics of the City Library.
D. Staff Meeting to Discuss Results — We will set up a meeting to discuss the proposed
results of the stormwater evaluation with City Staff.
Minneapolis ■ St. Cloud
Equal Opportunity Employer
Mr. Kevin Hansen
April 28, 2014
Page 2
Deliverables:
Concept level figures of 3 flood storage and BMP alternatives graphically
representing footprint
Engineers estimates for each BMP and flood storage option
Technical Memo describing requirements and analysis
SCHEDULE AND FEES FOR PROFESSIONAL SERVICES
We propose to start work once the contract is signed. The soil borings are expected to be
completed the week of May 5`" and will be utilized to refine the BMP costs. We will complete
work by May 30th in order to meet the City's schedule for procuring funding.
It is proposed that this project be billed hourly with a total cost not -to- exceed the amounts listed
for each task. Listed below is a summary of the Fees for the proposed project as outlined in our
Scope of Services:
SCOPE OF SERVICES FEE BREAKDOWN:
Stormwater Concept Design: ................................................. $ 5,000
If you are in agreement with the terms as outlined above, please sign where indicated below and
return one copy to our office.
Thank you for this opportunity to propose on this project. If you should have any questions
regarding this proposal, please contact me at 763 - 231 -4811.
Sincerely,
WSB & Associates, Inc.
Earth Evans, PE
ACCEPTED BY:
City of Columbia Heights, MN
By (signature):
Title: Walt Fehst, City Manager
Date: