HomeMy WebLinkAbout6.e. Authorize 2021 MS4 Scope of ServicesI:\City Clerk\Agenda Items\Approved Items\6.e. Authorize 2021 MS4 Scope of Services.docx
City Council Meeting: May 4, 2021
E X E C U T I V E S U M M A R Y
AGENDA ITEM: Authorize 2021 MS4 Scope of Services AGENDA SECTION:
Consent
PREPARED BY: Brian Erickson, Director of Public
Works/City Engineer
Jane Byron, Stormwater Specialist
AGENDA NO. 6.e.
ATTACHMENTS: 2021 MS4 Scope of Services APPROVED BY: LJM
RECOMMENDED ACTION: Motion to Approve the 2021 Municipal Separate
Storm Sewer System (MS4) Scope of Professional Services
BACKGROUND
Attached for City Council review is the proposed MS4 Scope of Services from WSB & Associates, Inc.
This is the eighth year for which WSB has provided services to assist City staff with implementation
and administration of the MS4 General Permit requirements. The 2021 Scope of Services includes
tasks for general program management, Stormwater Pollution Prevention Plan (SWPPP) support and
implementation, and stormwater quality and elevation monitoring. In addition, this year the City of
Rosemount will be required to update the Part II application once the MPCA reissues the updated
MS4 Permit. These tasks are essential components of the MS4 General Permit.
The estimated fee of $32,618 for the proposed MS4 activities will be funded from the City’s Storm Water
Utility Fund.
On April 26, 2021, the Utility Commission reviewed the proposal and recommends City Council
approval of the proposal.
BACKGROUND
Staff is requesting City Council approve the 2021 MS4 Scope of Professional Services.
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Rosemount Annual MS4 Services_2021 3.4.2021.docx 701 XENIA AVENUE S | SUITE 300 | MINNEAPOLIS, MN | 55416 | 763.541.4800 | WSBENG.COM March 24, 2021
Mr. Brian Erickson, PE
Director of Public Works / City Engineer
City of Rosemount
2875 145th Street West
Rosemount, MN 55068-4997
Re: Estimate of Professional Services Fee
Program Support and Implementation for the City’s MS4 General Permit
Dear Mr. Erickson:
Attached for your review and approval is our proposed scope of services, fee, and schedule for
program support and implementation for the City of Rosemount’s Municipal Separate Storm
Sewer System (MS4) General Permit. WSB has worked closely with the City staff to update their
MS4 program and bring the required program changes into compliance from 2014 through 20 20.
Moving forward, we are proposing to complete the work as detailed in the attached scope to
ensure that the City of Rosemount’s MS4 program remains in compliance in 2021. The estimated
total Project Cost, including professional service fees and direct billing for monitoring line items, is
estimated to be $32,618.
If you agree with this proposal, please sign where indicated and return one copy to me. Please do
not hesitate to contact me at 763-231-4845 with any questions.
Sincerely,
WSB
Bill Alms, PE
Water Resource Project Manager
Attachment
Cc: Kyle Blazek (WSB)
ACCEPTED BY:
City of Rosemount, MN
Name
Title
Date
City of Rosemount
March 24, 2021
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SCOPE OF ENGINEERING SERVICES
FOR
PROGRAM SUPPORT AND IMPLEMENTATION
FOR THE CITY’S MS4 GENERAL PERMIT
CITY OF ROSEMOUNT PUBLIC WORKS
ROSEMOUNT, MN
SCOPE OF ENGINEERING SERVICES
Task 1 – Project Management (Estimated Fee $1,200)
Project management will be performed throughout the course of this project. The following
subtasks are included as part of Project Management:
1.1 Regular project updates will be provided to the City outlining budget status, work
completed to date, and project tasks remaining.
1.2 Attend project update meeting with City staff. This will include developing agendas,
preparing handouts and graphics, and attending meeting.
Deliverables: One (1) Meeting with City staff and Utility Commission to discuss final deliverables
of Stormwater Pollution Prevention Program and Monitoring results.
Task 2 – Stormwater Pollution Prevention Plan Support and Implementation (Estimated Fee
$4,950 + $85-$91 per hour for Environmental Compliance Inspections)
As part of this task, WSB will work with City staff to implement the annual requirements of the
MS4 permit to ensure the City of Rosemount’s MS4 program remains in compliance. The
implementation of these specific requirements has been divided into the following six subtasks:
2.1 General Program Support
As part of this task, the WSB Environmental Compliance Project Manager will provide
staff time in Rosemount as needed to assist staff with the implementation of the
updated Stormwater Pollution Prevention Program (SWPPP), which was developed
in Year 1. The WSB Environmental Compliance Project Manager will also provide a
quarterly written summary to the City outlining the following items:
• Tasks for staff members to complete as part of the program implementation.
• Any updates from the MPCA, LMC, MCSC, and VRWJPO that may offer
benefits or impacts to the City’s MS4 Permit Activities.
2.2 Bathometric Pond Inspections
This task consists of inspecting/surveying six (6) ponds consistent with the SWAMP
inspection prioritization. The SWAMP application will be updated to reflect the
inspection results. Findings from the inspections will be used to develop maintenance
recommendations. If inspections indicate maintenance is necessary, a pond review
memo may be needed to identify the extent of maintenance. An additional scope can
be provided to generate pond maintenance design memos for those basins identified
as requiring maintenance based on inspection results.
City of Rosemount
March 24, 2021
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2.3 Environmental Compliance Inspections:
WSB will provide an Environmental Compliance Specialist to complete weekly
environmental compliance inspections for new grading permits issued for
development projects within the City. This Specialist will manage the inspection and
forward any results to the project owners, any pertinent construction professionals,
and the City of Rosemount upon request. The inspection will be visual and
documented for NPDES and City Ordinance (Title 10, Chapter 1, Section 12: Erosion
and Sediment Control) compliance purposes. WSB will prepare an inspection report
detailing the inspection results. The compliance deficiencies will be documented with
photographs and site plan map locations to indicate any deficiencies. All reports will
be provided to the owner(s) within 24 hours of inspection completion. WSB will
complete the above tasks for an hourly cost of $85-$91 per hour, including mileage to
and from the project site. The cost associated with this task has traditionally been a
pass-through cost to the development projects.
Deliverables: Four (4) quarterly General Program Support Meetings with City staff, assistance to
City staff with Annual Report, six (6) bathometric pond survey maps uploaded into SWAMP, and
copies of weekly inspection reports from the environmental compliance inspections for selected
developments and projects.
Task 3 – Additional MS4 Program Services – Water Quality Monitoring Program (Total
Estimated Fee: $20,450, Sample Testing Cost + Equipment Purchase: $6,018)
This water quality monitoring program is included as an additional MS4 program service because
it will be used to fulfill multiple program requirements in minimum control measures (MCMs) 5 and
6 related to inspection, long-term operation, and maintenance of infiltration BMPs. The water
quality monitoring program provides the City with empirical data that will assist with:
• Guiding upcoming Watershed and City Stormwater Plan Updates and discussions with
observed runoff volumes and infiltration and evaporation rates.
• Identifying potential areas to receive regional volume reduction credit through stormwater
reuse applications.
• Validating pond treatment efficiencies from the SWAMP program with sampled Total
Suspended Solids and Total Phosphorus concentrations.
• Supporting conclusions in the City’s Non-Degradation Study with observed infiltration and
evaporation data.
• Creating a baseline for discharge volumes and pollutant loading assumptions of possible
future TMDLs in the Vermillion River and Mississippi River.
• Assessing winter pollutant concentration associated with snowmelt runoff.
As part of this task, WSB will evaluate stormwater runoff volume reduction and pollutant removal
performance of selected basins. WSB will discuss priority basins for conducting monitoring
activities with City staff. The monitoring equipment purchased by the City in 2014 and 2016 will
be utilized in 2021, as well as a new rain gauge to be purchased in 2021.
At the conclusion of the monitoring period, the 2021 data will be processed, and an annual report
will be prepared that summarized the results of the monitoring activities which will include the
following:
City of Rosemount
March 24, 2021
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3.1 Collect Surface Water Elevation and Rainfall Data
The objective of this task is to monitor stormwater runoff volume reduction
capabilities through infiltration and evaporation, within selected basins in the City.
WSB will install continuous surface water level loggers to provide hourly water
elevations during the monitoring period. Water level data will be used to develop
evaporation and infiltration rates and rainfall to runoff ratios. Additionally, WSB will
install two (2) continuous rainfall gauges within the City which will provide the date,
duration, and intensity of each rainfall event. The proposed basins for monitor
activities are identified in Figure 1. The components of this task include:
• Install eleven (11) continuous surface level loggers within selected basins
and perform monitoring from Late-May through October.
• Install two (2) continuous rainfall gauges.
• Complete monthly maintenance and data downloads to ensure proper
operation.
3.2 Collection of Water Quality Samples
The objective of this task is to determine pollutant loading from watersheds with
various land uses within the City.
Pollutant Loading – As part of this task, WSB will collect water samples from ten (10)
selected basins as part of routine data collection activities to determine pollutant
concentrations. Sampling locations are identified in Figure 1.
Water samples will be collected monthly, for an estimated nine (9) months. Two (2)
sampling events will be completed during winter months of 2021 to assess snowmelt
pollutant concentrations from the six (6) locations identified on Figure 1. The
remaining seven (7) samples will be collected from May through October for all ten
(10) locations. The samples will be analyzed for the following parameters for all
events:
• Total Phosphorus ($12)
• Ortho – Phosphate ($11)
• Total Suspended Solids ($12)
• Chloride ($17)
Specifically, for Location 9 (Wachter) samples will be collected from surface and
bottom of the pond for all parameters listed below as well as temperature and DO
profiling to be completed during these site visits.
3.3 Annual Reporting
As part of this task, data collected during the monitoring period will be analyzed to
determine interim infiltration and evaporation rates, rainfall to runoff ratios, reuse
suitability assessment, and to identify if there are any changes that need to be made
to the monitoring protocols.
Deliverables: One (1) Technical Memorandum summarizing 2021 monitoring results including
tables and figures.
TIME SCHEDULE
It is anticipated that the work outlined above will be completed from May 2021 through March
2022.
City of Rosemount
March 24, 2021
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TOTAL ESTIMATED ENGINEERING FEE
This proposal outlines the work needed to complete the tasks associated with the City’s MS4
Program. The total estimated fee for the professional services for program support and
implementation of the City’s MS4 General Permit, Task 1-3 described above is $32,618 which
includes $26,600 in professional services and $6,018 in direct billing for monitoring program
services. The table below details costs for each task described in this scope of services.
Task No Description Estimated Fee Direct Billing
Task 1 – Program Management
1.1 Monthly Project Updates $850
1.2 Final Deliverables Meeting $350
Subtotal for Task 1 $1,200
Task 2 – Stormwater Pollution Prevention Plan Support and Implementation
2.1 General Program Support $1,200
2.2 Bathometric Pond Inspections $3,750
2.3 Environmental Compliance Inspections TBD
Subtotal for Task 2 $4,950
Task 3 - Additional MS4 Program Services – Water Quality Monitoring Program
3.1 Collect Surface Water Elevation and Rainfall
Data
$7,800 $500
3.2 Collection of Water Quality Samples $5,750 $5,518
3.3 Annual Reporting $6,900
Subtotal for Task 3 $20,450 $6,018
Total for Project $26,600 $6,018
GF
GF
Location #1 (BP-1408)Surface water monitoringWater Quality Sampling
Location #2 (KL-1486)Surface water monitoringWater Quality Sampling
Location #3 (KL-1589)Surface water monitoringWater Quality Sampling
Location #4 (KL-1687)Surface water monitoringWater Quality Sampling
Location #5 (KL-1716)Surface water monitoringWater Quality Sampling
Location #6 (EP-578)Surface water monitoringWater Quality Sampling
Location #7 (KL-1865)Surface water monitoringWater Quality Sampling
Location #8 (WA-600)Surface water monitoringWater Quality Sampling Location #9 (WA-2443)Surface water monitoringWater Quality Sampling
Location #10 (SP-614)Surface water monitoringWater Quality Sampling
G±WX
Birger Pond (BP-514)Water Quality Sampling
Location #11 (WRV-1710)Surface water monitoring Only
GF
GF
Location #1 (BP-1408)Surface water monitoringWater Quality Sampling
Location #2 (KL-1486)Surface water monitoringWater Quality Sampling
Location #3 (KL-1589)Surface water monitoringWater Quality Sampling
Location #4 (KL-1687)Surface water monitoringWater Quality Sampling
Location #5 (KL-1716)Surface water monitoringWater Quality Sampling
Location #6 (EP-578)Surface water monitoringWater Quality Sampling
Location #7 (KL-1865)Surface water monitoringWater Quality Sampling
Location #8 (WA-600)Surface water monitoringWater Quality Sampling Location #9 (WA-2443)Surface water monitoringWater Quality Sampling
Location #10 (SP-614)Surface water monitoringWater Quality Sampling
G±WX
Birger Pond (BP-514)Water Quality Sampling
Location #11 (WRV-1710)Surface water monitoring OnlyFile: K:\011823-000\GIS\Maps\Pond Land Use Maps\2020 Monitoring Locations.mxd, 3/29/2021 1:09:09 PM2021Proposed Water Qualityand Quantity Monitoring Locations
Legend
GF Continious Rainfall Monitors
2011, 2014-2020 Monitored Ponds (10)Monitored Pond 2016-2020City Boundary
This Evaporation and Infiltration MonitoringProgram has been developed to furtherestablish evaporation and infiltration thatoccur within the City. In addition, this studyis performed to verify the estimatedstormwater abstractions and runoff volumesthat were developed for the City'sNondegradation Plan.
Ü
0 0.5 10.25 Miles
Please note that the basins selected for monitorng have beenupdated from past monitoring efforts in order to provide a broaderrepresentation of evaporation and infiltration rates and runoff ratios