HomeMy WebLinkAbout23 - Amendments Amendment Number 4 - Advanced Engineering and Environmental Services - Wastewater Collection System Model Update Phase 2 Page 1 of 2
Amendment No. 4 to Professional Services Agreement for: Wastewater Collection System Model Update – Phase 2
THIS AGREEMENT is made as of this day of , 20 ,
between THE CITY OF BOZEMAN, a Municipal Corporation, Bozeman, Montana, herein referred
to as CITY and Advanced Engineering and Environmental Services, LLC an Engineering Consulting Firm of Bozeman, Montana, herein referred to as consultant. WHEREAS, the parties have entered into a Professional Services Agreement dated February
24, 2020, herein referred to as Original Agreement for professional engineering services; and
WHEREAS, the parties desire to further amend the provisions of this Agreement. NOW, THEREFORE, IN CONSIDERATION OF THE MUTUAL COVENANTS
CONTAINED HEREIN, the parties agree as follows:
Amend Section 1. Purpose: of the Original Agreement to add a new paragraph to read: City and Consultant agree to incorporate and Consultant agrees to perform additional Scope of Services attached hereto as “Attachment A – Wastewater Collection System Model Update – Phase 2 – Amendment 4”.
Amend Section 4. Payment for Scope of Services: of the Original Agreement to add a new paragraph to read: City agrees to pay Consultant for the completion of the additional Scope of Services attached hereto as “Attachment A – Wastewater Collection System Model Update – Phase 2 – Amendment 4” and totals $60,251. The Consultant’s billing rates range from $254/hr to
$135/hr for its employees are included with this Attachment A.
Except as specifically amended herein, the Original Agreement shall remain in full force and effect and the Parties shall be bound by all terms and conditions therein.
IN WITNESS WHEREOF, the parties hereto do make and execute this Agreement on the day
and year first above written.
CITY OF BOZEMAN
Jeff Mihelich City Manager
ATTEST:
Mike Maas
City Clerk
DocuSign Envelope ID: E9370C5D-72C5-460D-BA54-4F27FF9DBE96
June 2327th
Page 2 of 2
APPROVED AS TO FORM
Greg Sullivan City Attorney
CONSULTANT
ATTEST:
By:
By:
Its: Operations Manager
DocuSign Envelope ID: E9370C5D-72C5-460D-BA54-4F27FF9DBE96
ATTACHMENT A – Wastewater Collec�on System Facility Plan
SCOPE OF SERVICES – Amendment No. 4
Hydraulic Model Updates and Public Engagement
Task 1 - Mee�ngs
• Kickoff: One meeting with City staff to discuss scope and goals of increased density
modeling.
• Network update meeting: one meeting with City staff to review to discuss FME output;
review growth area extensions; review sewer replacement.
• Mapping meetings: Two meetings with City staff to identify, discuss, and finalize corridors
and locations of likely higher density development.
• Analysis review meetings: Two meetings with City staff to review scenario results and
discuss next steps.
• Documentation review meeting: One meeting with City staff to review draft project
documentation.
• Recommended Improvements Workshop: Workshop with City staff to discuss new d/D
exceedances and potential improvements and how to approach funding and
implementation
Task 2 - Model Network Update
• Run GIS exchanges to import new network features and update existing network features.
Includes one (1) import iteration.
• Revise Norton Ranch Lift Station under existing and future scenarios based on recently
completed development project
• Vertical realignment of Cottonwood sewer between Oak and Baxter in the existing and
future scenarios based on road extension City project (NW Crossing sewer lowering)
• Revise Laurel Gardens Lift Station under future scenarios based on Rose Apartments
Development plan
• Update and run existing system scenarios within the model to ensure new and updated
elements are correctly activated and utilized by the model.
• Update and run Infill and UBO dry and wet weather scenarios within the model to ensure
new and updated elements are correctly activated and utilized by the model.
• Update model results data within model attribute fields to reflect updated d/D for pipes.
Task 3 - Model Scenario Development and Analysis
• Increased Density Mapping:
o Develop a map showing Increased Density Scenario assumptions.
• Scenario Development:
o Scenario 1: Increased Density Infill
Increase R-S, R-1, and R-2 domestic wastewater loading by 25% to account for
Section 19 in SB 382 (this is equivalent to an additional 0.24 MGD domestic
loading)
Assume all infill and future annexations within current City boundary become R-
4 zoning (20 dwelling units/acre)
o Scenario 2: Increased Density Facility Plan-UBO
DocuSign Envelope ID: E9370C5D-72C5-460D-BA54-4F27FF9DBE96
Scenario 1 “infill” conditions plus Facility Plan-UBO allocation using future land
use
o Wet weather conditions will be evaluated for each added scenario.
• Model Analysis:
o Develop pre- vs. post-increased density impact exhibits.
o Review results with City staff and identify locations where hydraulic performance is not
met, including depth to diameter (d/D) requirements and surcharging modeling results.
Design flow will be calculated at flow depths that correspond to the City’s d/D design
requirements.
Task 4 - Documenta�on of Analysis, Cost Implica�ons, and Recommenda�ons
• AE2S will write and deliver a technical memorandum (delivered as a pdf document).
• Documentation will include:
o Summary of model input parameters for existing and increased density conditions.
o Summary of trunk sewers that exceed hydraulic performance requirements (d/D)
for the scenario.
o General recommendations will be provided to address issues identified at locations
of increased density. Recommendations may include:
Policy discussion on impacts of further increased density beyond current Future
Land Use Plan
Further analysis to refine sizing needs
Further flow monitoring
Maximum allowable densities
• Incorporate increased density analysis findings into overall Facility Plan and Graphical Executive
Summary
Task 5 - Facility Plan Public Engagement Coordina�on
• AE2S will coordinate with City’s communication team to prepare public engagement
templates.
• AE2S will review public comment and incorporate into draft Facility Plan
Proposed Fee
Scott Buecker Zach Magdol Donovan Voeller Aidan Scheffel
Rate ($/hr)$254 $220 $190 $135
Task Description Hours Hours Hours Hours
1 Meetings 6 12 14
2 Model Network Update 8 60 25
3 Model Scenario Development & Analysis 2 14 36 40
4 Documentation and Recommendations 6 32 40 12
5 Public Engagement Coordination 8 8
Subtotal Hours 14 74 158 77
Subtotal Fee $3,556 $16,280 $30,020 $10,395
$60,251
Hydraulic Model Updates & Public Engagement
Total for Increased Density Modeling
DocuSign Envelope ID: E9370C5D-72C5-460D-BA54-4F27FF9DBE96