HomeMy WebLinkAboutAdden 1AMENDMENT NO. 1 TO AGREEMENT FOR DESIGN SERVICES
FOR THE SE 172ND ST AND 125TH AVE SE GREEN
STORMWATER INFRASTRUCTURE DESIGN PROJECT
SWP-27-4037)
THIS AMENDMENT, dated November 30, 2020, is by and between the City of Renton (the “City”),
a Washington municipal corporation, and Osborn Consulting, Inc. (“Consultant”), a Washington
corporation. The City and the Consultant are referred to collectively in this Amendment as the
Parties.” Once fully executed by the Parties, this Amendment is effective as of the last date
signed by both parties.
Whereas, the City engaged the services of the Consultant under Agreement CAG-19-139, dated
April 1, 2019, to provide necessary services for the SE 172nd St and 125th Ave SE Green Stormwater
Infrastructure Design Project (referred to herein as the “Agreement”);
Whereas, the Parties wish to amend the Agreement to change the scope of work, change the
time for performance, and change the compensation increased by $128,582.00.
NOW THEREFORE, It is mutually agreed upon that CAG-19-139 is amended as follows:
1. Scope of Work: Section 1, Scope of Work, is amended to add work as specified in Exhibit
A-1, which is attached and incorporated herein.
2. Time of Performance: Section 3, Time of Performance, is amended pursuant to the
schedule(s) set forth in Exhibit C-1. All Work shall be performed by no later than June 30,
2022.
3. Compensation: Section 4, Compensation, is amended so that the maximum amount of
compensation payable to Consultant is increased by $128,582 from $257,889 to
386,471, plus any applicable state and local sales taxes. The additional compensation
shall be paid based upon Work actually performed according to the rate(s) or amounts
specified in Exhibit B-1, which is attached and incorporated herein.
4. All terms of the Agreement not explicitly modified herein shall remain in full force and
effect and such terms shall apply to Work performed according to this Amendment as if
fully set forth herein.
CAG-19-139, Adden #1-20
PAGE 2 OF 2
IN WITNESS WHEREOF, the Parties have voluntarily entered into this Amendment as of the date
last signed by the Parties below.
CITY OF RENTON
By:_____________________________
CONSULTANT
By:____________________________
Armondo Pavone
Mayor
Robert Parish
Vice President
Date Date
Attest
Jason A. Seth
City Clerk
Approved as to Legal Form
By: __________________________
Shane Moloney
Renton City Attorney
Contract Template Updated 01-15-2020
Clb 10-28-20 725
12/16/2020
Approved by Cheryl Beyer via 10/28/2020 email
City of Renton
SE 172nd St and 125th Ave SE GSI Design Project – Amendment No. 1 Page 1 of 6
EXHIBIT A
SCOPE OF WORK – AMENDMENT NO. 1
Project: SE 172nd St and 125th Ave SE Green Stormwater Infrastructure Design Project
PRIME Consultant: Osborn Consulting, Inc.
Contract No.: SWP-27-4037
Background
The Project will plan and design stormwater system modifications and green stormwater infrastructure
GSI) to improve water quality and drainage capacity for approximately half a block (600 ft) north of SE
172nd Street for 122nd Ave SE, 123rd Ave SE, 124th Ave SE and 125th Ave SE, and approximately two
blocks (1,400 ft) of SE 172nd Street. Runoff from these streets are currently collected and conveyed east
through private parcels and south within street right-of-way into a storm system on SE 172nd Street where
it discharges into a wetland located approximately 150 feet south of the intersection of 127th Ave SE and
SE 172nd Street. This runoff eventually flows into Big Soos Creek, a Category 5, 303(d) listed waterbody
for dissolved oxygen, ammonia, and pH.
The Project will consist of installing a new conveyance system and green infrastructure, such as
bioretention and pervious concrete sidewalks supplemented with GULD facilities to collect and treat
stormwater runoff from approximately 2 acres of pollution generating impervious surfaces.
The project design and deliverable will meet the requirements of the Washington State Department of
Ecology (Ecology) Water Quality Stormwater Pre-Construction Grant agreement and follow the 2019
Stormwater Management Manual for Western Washington (2019 SWMMWW), and the 2017 City of
Renton Surface Water Design Manual (SWDM) as an amendment to the 2016 King County Surface
Water Design Manual.
This amendment extends the project schedule and adds work elements 8 and 9 with expanded project
limits and site survey along SE 170th Place west of 122nd Ave SE to 121st Ave SE. Additional scope
elements are added to Task 2, Data Collection and Review, and Task 6, 90% PS&E. The primary object
of this amendment is to provide additional budget for scope added to the project.
1 Project Management $16,572 ($2,163)$11,322 $27,894
2 Data Collection & Review $80,216 $23,151 $23,764 $103,980
3 Environmental Review, Permitting & Public Outreach $11,259 $4,898 $0 $11,259
4 30% Design $31,350 ($1,192)$0 $31,350
5 Ecology Design Report/60% PS&E $51,962 ($17,865)$0 $51,962
6 Ecology 90% Design Package Submittal/90% PS&E $62,734 ($5,987)$63,396 $126,130
7 Ecology Grant Application Support - Upon City Authorization $3,796 $2,592 $0 $3,796
8 Drainage Revisions on SE 172nd Street $0 NA $8,624 $8,624
9 Ecology 100% Design Package Submittal/100% PS&E $0 NA $21,476 $21,476
Total $257,889 $3,434 $ 128,582 $386,471
Revised
ContractFeesTaskDescriptionOriginalContractFees
Budget
Remaining
Amendment 1
Fees
City of Renton
SE 172nd St and 125th Ave SE GSI Design Project– Amendment No. 1 Page 2 of 6
Task 1 – Project Management
Monitoring and communicating the status of the scope, schedule, and budget of this work assignment and
providing monthly reporting to the City.
Consultant Services
Extension of project schedule through June 2021 for the 100% design submittal.
Prepare status reports describing the following:
o Services completed during the month.
o Outstanding issues (if any).
o Scope/schedule/budget status.
o A financial summary.
Prepare and manage Project Schedule
Attend two design review meetings, to discuss 90% and 100% Design review comments.
Bi-weekly PM Check-ins via web/phone
Invoicing
City of Renton’s Responsibilities
Attend project comment review meetings (in person or via teleconference).
Review and approve invoices.
Review and comment on submittals within the schedule.
Assumptions
Project duration will be extended by approximately 13 months.
There will be two design review meetings attended by up to three (3) Consultant Team members
and City staff. Design review meetings to be held at Renton City Hall or via teleconference.
Deliverables
Project schedule update to be provided with monthly status reports.
Bi-weekly check-in (as necessary and determined by City Project Manager prior to each week).
Monthly status reports.
Task 2 – Data Collection & Review
The Consultant will review available existing site data, provide site survey, limited geotechnical
investigations and coordination of utilities.
Task 2B – Topographical Survey
The Consultant Team will provide the following services, required to complete Task 8:
Additional topographic survey of SE 172nd Street SE drainage. The survey limits extent along the
SE172nd Street right-of-way from 122nd Ave SE to 121st Ave SE with topographic survey of the
exiting drainage ditch along the south parcel line of property at address 12015, 12105 and 12113 on
City of Renton
SE 172nd St and 125th Ave SE GSI Design Project– Amendment No. 1 Page 3 of 6
SE 170th Place. The survey will include the east side of 12015 and 12105 and west side of 12113
from edge of buildings to fence with property corners. The topographic survey will include:
o topography
o surfaces features
o storm sewer conveyance systems
o utilities based upon surface features, utility district provided as-builts and surface paint
marks from utility locate services.
Prepare an existing conditions survey base map, showing a 1-foot contour topographic survey at a
1”=20’ scale.
Prepare an existing conditions DTM based on the topographic survey data.
Two-man field survey crews will be utilized to establish site control and perform the majority of the
survey.
Surveyor will locate a sufficient amount of the existing right-of-way monuments to generate City
street rights of way and platted lot lines.
Surveyor will engage ONE-CALL to assist with private/public utility location.
All field data will be processed in accordance with City of Renton survey and CADD standards and
sent in AutoCAD as a block drawing.
The horizontal and vertical datums will be City of Renton (i.e. NAD83(1991) horizontal and NAVD-
88 vertical).
The topographic survey will be developed as a 1’=20’ scale file with one-foot contours, or as
specified.
City of Renton’s Responsibilities
None.
Assumptions:
No additional wetland survey is anticipated for the drainage connection to the existing ditch.
Deliverables:
Revision to stamped survey sheets for inclusion in plan set (PDF)
One survey exhibit for a proposed drainage easement from the existing ditch along SE 170th
Place.
Task 2C – Geotechnical Investigations
No further geotechnical investigations or deliverables anticipated.
Task 2D – Data Collection & Review – Utility Potholing
Based on the 60% Design review, the Consultant has identified potholing needs and will coordinate
potholing to be provided by a potholing vendor. Pothole locations will be documented by field survey.
Assumptions:
Pothole quotes will be obtained from at least two vendors. Budget assumes up to five additional
5) potholes overall for watermains locations at $1,500 each, plus $1,000 for traffic control. Gas
City of Renton
SE 172nd St and 125th Ave SE GSI Design Project– Amendment No. 1 Page 4 of 6
mainlines as assumed to be potholed by Puget Sound Energy (PSE) and provided to the
Consultant.
Pothole vendor will obtain required permits prior to performing their work. The City will
facilitate a quick permit review of right-of-way use permits.
Pothole vendor will provide their own traffic control.
Deliverables:
Results of Potholing – Field Notes (PDF)
Updated Survey base map (in AutoCAD Civil3D format)
Task 5 – Ecology Design Report/60% PS&E
Additional tasks completed as part of the 60% Design are as follows:
One additional round of comment/responses for Ecology, including City review.
Revised 60% Design report to Ecology
Additional conveyance design for bypass flows
Backwater Analysis and additional SWMM modeling of proposed connections
Wetland Hydroperiod analysis per Ecology Review comments
Additional Flow Control design evaluation in WWHM 2012 for permeable sidewalks.
Additional scope added for ADA ramp options for City review.
Additional design sheets for plans than in the original contract
Cost for additional tasks of $19,057, covered with savings on the Task 2.C – Geotechnical
Investigations with Infiltration Testing
Task 6 – Ecology 90% Design Package Submittal/90% PS&E
Upon receipt of an Ecology Design Report Acceptance Letter, the Consultant shall prepare 90% level
plans, special provisions, estimate of probable cost, and an update of the project construction schedule for
the Ecology 90% Design Package Submittal.
Progressing the Design Report to 90% will be as follows and in accordance with the general assumptions
listed in the original contract. Only revisions to the original contract are listed.
1. Additional 90% plan sheets. The list of plan sheets below will be added to the estimated sheet
number from the original contract. These include the plans for the added drainage improvements
per the selected alternative through Task 8, two additional proposed plan and profile sheets, and
one additional existing conditions sheet anticipated for Task 8 design. Additional sheets listed
were added for extents of improvements exceeding original contract estimated sheet total.
Existing Conditions (add one (1) sheet, seven (7) total)
TESC/Demolition (add one (1) sheets, seven (7) total)
Plan and Profile Sheet (add seven (7) sheets, fourteen (14) total)
Additional Roadway Sections
Sidewalk and Curb horizontal control points table (add three (3) sheets)
ADA ramp design and control points (add three (3) sheets)
Restoration and Landscape Sheets (add one (1) sheet, seven (7) total)
City of Renton
SE 172nd St and 125th Ave SE GSI Design Project– Amendment No. 1 Page 5 of 6
City of Renton’s Responsibilities
City will provide input and review comments on the draft Design Report within the agreed upon
schedule.
City to provide direction on landscape design requirements.
Other responsibilities same as original scope.
Assumptions:
One round of 90% comment/responses.
Facility Operation and Maintenance Manual will be provided by City.
Deliverables:
Ecology 90% Design Package Submittal (Draft and Final):
Draft SWPPP (PDF).
Task 8 – Drainage Revisions on SE 170th Place
Additional drainage analysis and design will be completed for the drainage ditch at noted flooding along
the south parcel line of property at address 12015, 12105 and 12113 on SE 170th Place. This task will
include:
1. Evaluation of topographic survey provided through Task 2B.
2. Site visit for up to two (2) consultant team members.
3. Complete a brief options analysis for review with the City
Assumptions:
Selected improvements will be incorporated into the 90% construction set.
Deliverables:
1. Brief memorandum of recommended drainage revision with pipe alignment and profiles.
PDF).
2. Selected improvements will be incorporated into the 90% plan submittal under Task 6.
Task 9 – Ecology Final Bid Package Submittal/100% PS&E
Progressing the design report to 100% design will be as follows, in accordance with the general
assumptions listed below:
1. Respond to City’s and Ecology’s comments provided on the design report. (one round each).
2. Update 100% plans per these comments.
3. Update Engineer’s estimate of probable cost to match the 100% design
4. Update the standard specification to match the 100% design
City of Renton’s Responsibilities
City to provide consolidated 90% review comments
City of Renton
SE 172nd St and 125th Ave SE GSI Design Project– Amendment No. 1 Page 6 of 6
Assumptions:
Minimal design revisions anticipated after the 90% submittal.
Re-packaging plans, cost estimates or specifications based on limited grant funding approval is
not included in this scope.
Deliverables:
Ecology 100% Design Package Submittal (Final):
Engineer's 100% Construction Estimate of Probable Cost (PDF and Excel Spreadsheet)
100% Construction Plans (PDF)
100% Special Provisions (PDF and MS Word document)
Final Design Report (PDF)
City 90% Design Package comment response in MS Word document
Ecology 90% Design Package comment response in MS Word document