HomeMy WebLinkAboutReg 2024-12-02 Item 5F - Contract Amendment #4 - 131st St Drainage Improvement Engineering with Pace Engineers for $223,170COUNCIL AGENDA SYNOPSIS
Initials
Meeting Date
Prepared by
Mayar's review
Council review
12/02/24
JR
ITEM INFORMATION
ITEM No.
5.F.
STAFF SPONSOR: JOSH HOPKINS
ORIGINAL AGENDA DATE: 12/02/24
AGENDA ITEM TITLE S. 131st Street Drainage Improvement Project
Amendment No. 4 Additional Engineering Services
CATEGORY ❑ Discussion
Mtg Date
0
Motion
Date 12/02/24
❑ Resolution
Mtg Date
❑ Ordinance
Mtg Date
❑ Bid Award
Mtg Date
❑ Public Hearing
Mtg Date
❑ Other
Mtg Date
Mtg
SPONSOR ❑Council ❑Mayor ❑HR DCD ❑Finance ❑Fire ❑11_S' ❑PeR ❑Police IIPr ❑Court
SPONSOR'S The S 131st Drainage Improvement Project goal is to address flooding of roadway and
SUMMARY adjacent private properties from Southgate Creek including addressing other issues.
Amend No. 4 includes additional design and engineering services to produce a site
investigation report for the landslide in the middle reach, which is a source of accelerated
sediment transport to downstream resources. Council is being asked to approve Amend No.
4 with Pace Engineers for additional engineering services in the amount of $223,170.
REVIEWED BY
A Trans&Infrastructure
CommunitySvs/Safety Finance Comm. ❑ Planning/Economic Dev.
❑ Arts Comm. ❑ Parks Comm. ❑ Planning Comm.
11/25/24 COMMITTEE CHAIR: ARMEN PAPYAN
❑ LTAC
DATE:
RECOMMENDATIONS:
SPONSOR/ADMIN.
COMMII
Public Works Department
IEE Unanimous Approval; Forward to the Regular Consent Agenda
COST IMPACT / FUND SOURCE
EXPENDITURE REQUIRED AMOUNT BUDGETED APPROPRIATION REQUIRED
$223,170.00 $0.00 $0.00
Fund Source:
Comments:
MTG. DATE
RECORD OF COUNCIL ACTION
12/02/24
MTG. DATE
ATTACHMENTS
12/02/24
Informational Memorandum dated 11/22/24
Pace Scope and LOE
Map
CIP 2023-2024 Pg 85
CIP 2025-2030
Minutes from Transportation and Infrastructure Committee meeting of 11/25/24
(distributed separately)
63
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TO:
FROM:
BY:
CC:
DATE:
SUBJECT:
City of Tukwila
Thomas McLeod, Mayor
Public Works Department - Pete Mayer, Interim Director
INFORMATIONAL MEMORANDUM
Transportation and Infrastructure Committee
Pete Mayer, Public Works Director
Joshua Hopkins, Surface Water Project Manager
Mayor Thomas McLeod
November 22, 2024
S. 131st Street Drainage Improvement Project
Project No. 9161204, Contract No. 22-102
Amendment No. 4 Additional Engineering Services
ISSUE
Approve amendment No. 4 to Contract No. 22-102 with Pace Engineers for additional engineering
services in the amount of $223,170.
BACKGROUND
The S 131st Drainage Improvement Project goal is to address flooding of roadway and adjacent private
properties from Southgate Creek, and to address issues that contribute to flooding, water quality,
barriers to fish migration and habitat degradation. Historically, Tukwila has dredged Southgate Creek
along S 131st Place annually to limit flooding to ROW and private property. This requires an Hydraulic
Project Approval (permit) from the WA Dept. of Fish and Wildlife (WDFW). Upon authorizing the last 5-
year permit to dredge, WDFW requested the City develop an alternate solution to dredging the creek to
reduce flooding. The original contract's preliminary design and hydraulic modeling indicated the
proposed improvements had a high probability of reducing the need for dredging but does not resolve
flooding and indicated a broader approach to resolve flooding.
Therefore, the project scope has expanded and is now organized into three phases. The original
contract is Phase I, and it includes a re -alignment of the west fork and a fish passable replacement
culvert . Phase II (Amendment No. 3) work products are focused on increasing stream and stormwater
conveyance along S 131st and S 134th Place; this phase of work is in design development. Phase III is
a planning phase and will focus on understanding the impacts of the legacy landslide in the middle
reach, along 43rd Ave, and the affected downstream resources including commercial business district
and City stormwater conveyance. Work products form each Phase are intended to be integrated into a
future construction contract that implements a sustainable solution that addresses flooding, water
quality, fish passage and habitat degradation.
Amendment No. 4 (Phase III) includes additional design and engineering services to produce a site
investigation report for the landslide in the middle reach, which is a source of accelerated sediment
transport to downstream resources. Amend. No 4 tasks are intended to be predecessor tasks for a
future amendment to be funded by a Department of Ecology Community Based Public Private
Partnership (CBP3) grant (applied for 10/24, results expected Q2/'25). This future amendment will
include planning and outreach with the affected private property owners downstream of the landslide.
The site investigation report will establish a baseline understanding of the landslide in preparation for
private property owner engagement. The private property stormwater infrastructure between the
landslide and the flooding on S 134th and 131st PI. are integral to resolving the sediment transport and
stormwater conveyance issues contributing to flooding.
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ANALYSIS
This contract amendment will inlcude survey, critical area delineation, stormwater drainage and
hydraulic analysis, and geotechnical analysis for the landslide. Pace Engineers will develop a site
investigation report to understand the landslide and assess ways to manage streambank erosion that is
contributing to downstream flooding.
FISCAL IMPACT
Pace Engineers has provided a cost estimate not to exceed $223,170 to perform additional engineering
services. Total funding for contract 22-102 is $754,393.
Contract/Funding
Consultant
Budget
Original Contract with Pace Engineers
$371,610
Amend. No. 1 Site Investigation for ROW Acquisition
$19,880
Amend. No. 2 Contract Time Extension
No Cost
Amend. No. 3 Phase Ila Contract Rev. to Expand Hyd. Analy.
$139,733
Amend. No. 4 Phase Illb Middle Reach Land Slide Site Investigation
$223,170
Utility Revenue '23-'24
$311,000
Utility Revenue'25-'26
$205,000
2022 KC FRG (Secured)
$100,000
Utility Revenue'23-'24
$19,510
2022 SROF (Secured)
$56,598
2023 SROF (Secured)
$60,083
2024 SROF (Secured)
$64,213
2025 SROF (Secured, awarded, contract pending)
$62,442
Totals:
$754,393
$878,846
RECOMMENDATION
Council is being asked to approve Amendment No. 4 to Contract 22-102 with Pace Engineers for
additional engineering services in the amount of $223,170 and to consider this item on the Consent
Agenda at the December 2, 2024, Regular Council Meeting.
Attachments:
Pace Scope and LOE.pdf
Map.pdf
CIP '23-24 Pg 85.pdf
CIP '25-'26.pdf
Phone: 206-433-1800 • Email: Mayor@TukwilaWA.gov • Website: TukwilaWA.gov
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WATER I LAND I INFRASTRUCTURE I FACILITIES
SCOPE OF WORK
131ST PL DRAINAGE IMPROVEMENTS
PHASE IIIB — FEASIBILITY
PROJECT UNDERSTANDING
The City of Tukwila (City) has requested a proposal for engineering services to research and
investigate a historical landslide centered around 43rd Avenue S from S 137th Street to Macadam
Road S.
This effort includes the following:
1 Project management time, team meetings, and coordination with project
subconsultants.
2. Topographic and boundary survey for the area shown as Phase IIIB on Exhibit A.
3. Review the video inspection and develop a report of recommendations for the City to
repair/replace any deficiencies that are observed. Approximately 500 linear feet of
stormwater conveyance system is to be cleaned, inspected, and analyzed.
4. Prepare Site Investigation Report and Recommendations
Includes, reviewing recommendations from the Kramer, Chin & Mayo Study for the
West Reach of Southgate Creek and applying appropriate recommendations to the
Middle Reach of Southgate Creek.
5. Critical area review and study of creek channel, Geotechnical review/monitoring of
the subject area and associated creek channel.
PACE proposes the following scope and fee for the 131 s` PL Drainage Improvements Phase IIIB
Feasibility Study.
SCOPE OF SERVICES
Task 1: Project Management, Meetings, and Coordination
PACE will be responsible for conducting ongoing management/administration of the
consultant team in accordance with the provisions of the Agreement. Ongoing management
will include completion of professional services in a timely manner and within the agreement
budget.
PACE will maintain regular contact and coordination with the City Project Manager in
accordance with the provisions of the Agreement. The PACE Project Manager will be
responsible for:
■ Maintaining regular contact with the City and designated project management
team staff through telephone conversations and e-mails
■ Maintaining open access to project information by the City.
3501 Colby Avenue, Suite 101
Everett, Washington 98201-4794
425.486.4794
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City of Tukwila
131st Drainage Improvements Phase IIIB
Scope of Work
Page 2 of 8
• It is PACE's intent to maintain open communication with the City at all levels of the
PACE project team. Therefore, the City Project Manager may contact team
members as needed.
PACE will provide administration and coordination throughout the duration of the project,
including coordination of survey and subconsultants, contracting and invoicing, scheduling,
and client coordination. PACE will conduct regular coordination and update meetings virtually
with City of Tukwila and GeoEngineers at project milestones and as needed. The following
tasks are anticipated:
• Bi-weekly project check -in meetings. It is assumed there will be eight (8) meetings,
two (2) hours each for two (2) PACE staff, including preparation of the agenda and
meeting minutes.
• Project invoicing, progress reports, and team coordination. For the purpose of
budgeting, PACE has assumed the project will continue for 16 weeks through the
completion of this scope. If the project continues beyond this period, services will
be considered additional to the scope of this proposal. Prior to any additional work
being performed, PACE will provide the Client with an estimate of fees to continue
with these tasks.
Right -of -Entry (ROE) Coordination
PACE will coordinate the Right -of -Entry (ROE) for the environmental and survey field work for
the properties included in this phase of work. Using the City provided form and project
language, PACE will compile the packet of information to deliver to each property owner. The
property owner's information will be gathered from online public taxpayer records. Each
packet will be delivered to the taxpayer's address by delivery service (FedEX or similar). PACE
will maintain a record of all responses and prepare a map that indicates which properties
have granted access to PACE and their subconsultants. PACE will follow up one (1) time by
mail to the identified property owners with a letter reminding them of the ROE request.
PACE has identified up to 13 properties in this phase of work that will require signed ROE
forms granting permission to enter their property prior to beginning field work.
Right -of -Way (ROW) Permit Coordination
PACE will coordinate the ROW permit with the City for all work being performed within the
City's ROW. This includes all work being performed by PACE, subconsultants for the
Geotechnical assessment, critical areas, and CCTV video inspection.
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Scope of Work
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Assumptions:
1. No in person or direct coordination is included in this task.
Task 1 Deliverables
1. Meeting agendas in electronic form (PDF format). One (1) electronic copy for each
meeting.
2. Monthly status/progress reports and monthly invoices in electronic form (PDF
format).
3. Record and Exhibit of all ROE respondents.
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Scope of Work
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Task 2: Site Reconnaissance/Investigation & Survey/data collection
Up to two PACE project team staff will conduct two (2) site visits: one meeting to understand
the site -specific conditions, a second to provide visual inspection of drainage system for
residential properties directly upstream of subject area. These parcels include: 26120-0190,
0180, -0170, and -0160. Qualitative observations concerning existing vegetation, riverbank
conditions, exposed stormwater features, and exposed highway features will be documented
in field notes and site photos.
PACE will extend the topographic survey conducted in January 2023 to 43rd Avenue S
between S 137th Street and Macadam Road S. Survey control will be extended to gather
information on approximately 700 linear feet of closed Right -of -Way (ROW) within 43rd
Avenue S. Together with additional mapping in King County Tax Lots 261200TRCT and
261320TRCT as depicted on attached Exhibit "A".
Survey will also include stormwater inlet/outlet for culvert crossings under 43rd Avenue S and
Macadam Road S.
1. Topographic Survey — Shall include but is not limited to the following:
• Channel thalweg (deepest point) at 20 ft intervals, and break lines including toe
of stream bank, top of bank, any terraces or major bars or other features, and
floodplain lying 10' of elevation change on either side of edge of channel and
where the topography connects at the top of bank to address overhang
specifically along the east bank
• Water surface elevations (as required).
• Major channel angle points.
• Wetlands flag and ordinary high water (OHW) delineations.
• Culverts with invert elevation and size.
• Roadway features on 43' Avenue S.
• Planted ornamental trees
• Retaining walls and rockeries
• Fencing, curb, pavement, and gravel edges
• Roadway markings and signage
• Surface indications of utilities, such as vaults, pedestals, irrigation etc.
• Utility lines that can be visually observed, located by RF locating equipment or
identified on readily available record drawings.
• Sewer and storm structures will be measured for invert elevations, size of pipe,
and size of structure.
• Any tree 8-inch in diameter or greater, as measured 4 feet above the ground.
• Contours will be generated at a 1-foot interval.
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Scope of Work
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PACE survey team will thoroughly investigate and integrate relevant information accessible
from City data sources, whether readily available or provided. Any additional time due to
unforeseen issues or out of scope work will be billed on a Time -and -Expense (Rates) fee basis
only after City's approval.
Assumptions:
1. Any signed ROE form needed will be granted by the property owners.
2. Any OHW and Wetland delineation flags will be hung by GeoEngineers prior to the
commencement of the field survey.
3. Re -mobilizations or additional work based on areas or features of concern that were
not originally discussed; areas identified by other specialists (Biologists, Arborists,
etc.) after the initial field work or those areas which were not accessed due to safety
or limitations of time is not included and would be considered additional work.
4. King County GIS parcel lines will be used to show appropriate ROW and property
lines. No ownership or occupancy will be a part of this survey.
5. This Task is a Topographic Survey and not a Boundary Survey.
6. Topographic mapping data will be provided by PACE in AutoCAD C3D 2021 per PACE
ACAD standards.
Task 2 Deliverables
1. Survey basemap CAD file in .dwg format and signed PDF sheet set
Task 3 — Inspection Review and Recommendation of Repair/Replacement
PACE to contract with a CCTV contractor from small works roster to CCTV multiple pipe
segments and then provide tapes and inspection reports to PACE.
PACE will perform a review of the contractor provided video inspections of the stormwater
system. As part of the review any anomalies in the pipes will be noted and classified per the
Pipeline Assessment Certification Program's (PACP) anomaly code referencing system. PACE
will use these observations and information to develop a report that proposes
repair/replacement for all anomalies observed in the video of the system; these observations
and recommendations will be provided in the Site Investigation Report described later in this
scope.
Assumptions
1. PACE will have a contractor from the City's small works roster as a sub to this
contract to CCTV the pipe(s) and provide visual inspection of catch basin structures
within 43rd Avenue S from S 137th Street to tax parcel 261320-0152. The contractor
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Scope of Work
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will provide CCTV video inspection reports in PDF form and videos in digital form to
the City. The CCTV subcontractor will provide inspection reports and videos to PACE.
2. This company will be a PACE subconsultant.
3. As the exact condition of the pipes is unknown, for budgeting purposes the number
of anomalies in the system that are anticipated to be addressed is 12 (approximately
1 anomaly for every 50 feet of pipe inspected). Efforts expended to analyze/provide
recommendations for anomalies in excess of this estimate will require an additional
services agreement (ASA) or will be billed on a time and expenses basis.
4. The recommendations for pipe repair/replacement will be driven by a combination of
the video inspection and surface restoration efforts/requirements.
5. The report will include recommendations for pipe repair/replacement and will not
include any analysis of existing drainage structures such as catch basins, storm
drain manholes, flow splitters, water quality/detention facilities etc.
6. No design drawings will be produced for this task. The report will include a map that
is graphical in nature that shows the location of all anomalies analyzed.
7. PACE will coordinate ROW permitting with the CCTV subconsultant and City. ROW
permit fees for this work will be reimbursed by the City.
Excludes:
Pipe replacement as a result of the recommendations report for the CCTV and pipe inspection
task.
Task 3 Deliverables
1. PACE will provide a draft pipe assessment report in electronic form (PDF format) for
one (1) review to be performed by the City.
2. PACE will provide a final pipe assessment report in electronic form (PDF format)
based on the City's review initial review comments.
Task 4 — Site Investigation Report
After initial studies and site investigation are complete, PACE will prepare a site investigation
report summarizing site findings and initial design approach recommendations. PACE will
provide up to three (3) recommendations (or menu of options) to address arresting sediment
within Southgate Creek between S 137th Street and Macadam Road S.
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Scope of Work
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Assumptions
3. The report will be limited to recommendations drawn from site investigation, survey,
geotechnical, the Kramer, Chin, and Mayo report dated 1992, and critical areas
reports completed as a part of this scope of work.
4. PACE will coordinate with City staff regarding maintenance frequency of storm
structures within and directly upstream of the subject area to determine.
5. PACE will utilize land use and flow data from previously completed PACE hydraulic
reports and not conduct new modeling for this phase of work.
Task 4 Deliverables
1. PACE will provide a draft site investigation report in electronic form (PDF
format) for one (1) review to be performed by the City.
• Within the report, exhibits will be provided that illustrate the stream
profile from the culvert south of S. 137`h Street, through the open space
and ending at the culvert north of MaCadam Road S. Sections will be
provided as needed.
• A considerations, limitations, and opportunities spreadsheet will be
included as an exhibit/figure within the draft site investigations report.
• PACE will provide up to three (3) recommendations (or menu of options)
along with a summary of the options for City review.
• Observations and recommendations from the CCTV pipe inspection task
above will be incorporated into the Site Investigation Report.
2. PACE will provide a final site investigation report based on City comments in
electronic form (PDF format) to the City.
Task 5: Sub -Consultant Geotechnical Review, Wetland, and Stream Delineations
GeoEngineers has provided the attached geotechnical assessment and wetland and stream
delineation services as a sub -consultant to PACE Engineers, Inc.
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Scope of Work
Page 8 of 8
PROJECT COST
The costs associated with the above -described work are shown on the attached spreadsheet.
Fees shown in the summary table below outline the current balance and requested contract
amendment.
ESTIMATED PROJECT COST PHASE IIIB $ 193,170
PROPOSED MANAGEMENT RESERVE FUND PHASE IIIB $30,000
SUBTOTAL PHASE IIIB $223,170
ORIGINAL CONTRACT AMOUNT $371,610
AMENDMENT#1 Site Investigation Report $19,880
AMENDMENT#2 Contract Extension
AMENDMENT #3 $139,733
SUBTOTAL CURRENT CONTRACT AMOUNT $531,223
REQUESTED #4 CONTRACT AMENDMENT $223,170
TOTAL CONTRACT WITH AMENDMENT #4 $754,393
END OF SCOPE OF WORK
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131st PL Drainage Improvements Phase Illb A
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Property acquisition feasibility analysis
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Phase IIIb '1
Task 1 Project Management
Meetings and Project Management
C.)
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Subconsultant Coordination
Subtask 1.1 ROE Coordination
Subtask 1.2 ROW Permit Coordination
Task 2 Site Investigation and Research
Subtask 2.1 - Topographic Survey
Subtask 2.2 - Site Reconnaissance / Review
ITask 3 Inspection Review and Recommendation
Subtask 3.1 - Draft Pipe Assessment Report
Subtask 3.2 - Final Pipe Assessment Report
Task 4 Site Investigation Report
Subtask 4.1 - Prelim. Site Investigation Report and
Recommendations
Subtask 4.1.1 - Review of Kramer, Chin & Mayo Studyl
Subtask 4.2 Final site investigation report - Addressing City
Comments
Subconsultant Report Sections - In Geotechnical Feel
Geotechnical report for the cause of landslide (GeoEngineer)
Landslide mitigation feasibility
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Printed: 11/19/2024, 3:32 PM
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File: Phase IIIB_Budget Worksheet.xlsx, Fee Worksheet
77
78
Ili PACE
DESCRIPTION
2024 STANDARD
HOURLY RATE SCHEDULE
Effective January 1, 2024
Water I Land I Infrastructure I Facilities
1. Office Tech I, Expediter I
2. Office Tech 11, Expediter II, Survey Field Tech
3. Intern, Survey Tech I, Jr. CAD Tech, Jr. Inspector, Office Tech III
4. Designer, Jr. Planner, Survey Tech II, CAD Tech, Inspector, Sr. Office Tech, Jr. Ecologist/Scientist
5. Jr. Engineering Staff, Designer I, Planner, GIS Tech, Survey Tech III, CAD Tech I, Inspector 1,
Project Administrator, Ecologist
6. Landscape Architect, Engineering Staff I, Designer II, Planner I, Survey Tech IV, GIS Analyst I, CAD
Tech II, Inspector II, Sr. Project Administrator, Ecologist I,
7. Landscape Architect 1, Engineering Staff II, Designer III, Planner II, GIS Analyst II, CAD Tech III,
Inspector III, Survey Tech V, Ecologist 11
8. Landscape Architect II, Project Designer, Planner III, Sr. Survey Tech, GIS Analyst III, Engineering
Staff III, Sr. CAD Tech, Sr. Inspector, Scientist, Ecologist III
9. Landscape Architect III, Engineering Staff IV, Project Designer I, Sr. Planner, Project Surveyor,
Sr. GIS Analyst, CAD Manager, Project CAD Tech, Sr. Project Inspector, Survey Field Tech I,
One -Person Crew, BIM Manager, Ecologist IV, Engineer IV, Scientist I
10. Landscape Architect IV, Project Engineer, Project Designer II, Project Planner, Sr. Project Surveyor,
Sr. Project GIS Analyst, Structural Engineer, UAS Pilot, Scientist II, Ecologist V
11. Sr. Landscape Architect, Sr. Project Engineer, Sr. Structural Engineer, Sr. Project Designer,
IT Manager, Sr. Project Planner, Survey Project Manager, Tech Services Manager,
Sr. Ecologist/Scientist
12. Principal Ecologist/Scientist, Project Manager, Principal Surveyor, Planning Project Manager
13. Sr. Principal Ecologist/Scientist, Sr. Project Manager, Sr. Principal Surveyor, Two -Person Crew
14. Principal Engineer, Principal Planner, Sr. Two -Person Crew
15. Sr. Principal Engineer, Sr. Principal Planner
HOURLY RATE
$ 65.00
$ 80.00
$ 100.00
$ 120.00
$ 136.00
$ 151.00
$ 166.00
$ 181.00
$ 194.00
$ 209.00
$ 222.00
$ 238.00
$ 252.00
$ 272.00
$ 288.00
A.
B.
C.
D.
E.
F.
G.
REIMBURSABLES
Subconsultants, Professional and Technical Cost + 15%
Project Administration $60.00/Invoice
Maps, reports, materials, permit fees, express delivery and messenger,
pass -through bills, and similar items necessary for work in progress Cost + 15%
Out -of -Town travel per diem and cost of commercial transportation Cost + 10%
Transportation within 30 Mile Radius * No Charge
Transportation beyond 30 Mile Radius -Automobile At Approved IRS Rate
* On job inspection mileage will be billed At Approved IRS Rate
Copies: Legal, Letter, Ledger $ 0.25/page
Large Format Blueprints and Reproduction (18" x 24" or larger $ 3.00/sheet
Expert Witness Rate x 1.5
Notes: 1 All payment is due within 30 days from date of invoice. A monthly service charge of 1 % will be added on all accounts
older than 30 days.
2 The foregoing schedule of charges is incorporated into the agreement for the services provided effective
January 1, 2024. After December 31, 2024, invoices will reflect the schedule of charges in effect at that time.
Rev. 2/21p4
80
GEOENGINEERS
1101 Fawcett Avenue, Suite 200
Tacoma, Washington 98402
253.383.4940
November 19, 2024
PACE Engineers, Inc.
11255 Kirkland Way, Suite 300
Kirkland, Washington 98033
Attention: Brian Way, PLA, ASLA
Subject: City of Tukwila
South 131st Place Drainage Improvements - Culvert Replacement
Phase 3b Scope
Tukwila, Washington
File No. 0259-061-00
Introduction
The following scope and fee provides additional environmental and geologic/geotechnical services for the
South 131st Place Drainage Improvements Project in Tukwila, Washington. Our understanding of the
requested services is based on a site visit and coordination call with PACE Engineers, Inc. (PACE) and City
of Tukwila representatives on October 21 and October 25, 2024. Based on this coordination, it is our
understanding that Phase 3b of the project will entail assessment of the Middle Fork of Southgate Creek
in the vicinity of South 137th Street, 43rd Avenue South and Macadam Road South, including an adjacent
landslide area that has resulted in closure of 43rd Avenue South.
Scope of Services
The scope of services described below are anticipated to be approved through the amendment of our
existing subcontract with PACE pursuant to PACE's contract with the City of Tukwila for the project. The
tasks below will be completed as new/additional subtasks to the following existing tasks within our existing
agreement.
■ Task 6. Geotechnical Engineering Services
■ Task 9. Environmental Permitting
81
City of Tukwila I November 19, 2024 Page 2
TASK 6.4. PHASE 3B GEOLOGIC/GEOTECHNICAL ASSESSMENT
We understand that the new survey area includes a landslide that resulted in the closure of 43rd Avenue
South. During this data gathering phase, we have been requested to complete a reconnaissance level
survey to assess geologic hazards, including landslide hazards, earthquake hazards, volcanic hazard and
associated risks, and to address code requirements for these hazards consistent with Tukwila Municipal
Code (TMC) 18.45.120. Potential geologically hazardous critical areas, such as landslides, will be assessed
and delineated within the survey limits as shown in Exhibit A. Surveyable durable markers, such as nails or
screws, will be placed at key locations in the delineated landslide area. A geotechnical report will be
prepared consistent with the requirements of TMC 18.45.040 for submittal. The report will include
recommended site -specific landslide and erosion hazard zones, volcanic hazard zones and earthquake
hazard zones, as well as options for potential mitigation measures, if necessary.
1. Review and compile available pertinent documentation related to the geology, steep slopes and
landslides, erosion and other potential geologic and seismic hazards at the project site from
Washington State Department of Natural Resources (DNR) and other pertinent publicly accessible
sources.
2. Obtain publicly accessible lidar data from the DNR to generate hillshade and topographic maps for the
site and adjacent slopes and interpret and map landslides and potential erosion areas.
3. Complete a planning -level site visit with the City of Tukwila and PACE staff.
4. Complete a geologic reconnaissance of the project area as shown on Exhibit A. We will observe exposed
surface soils. We will also note observed indicators of slope instability such as scarps, leaning trees
and seeps or springs. The site visit will also include assessment of potential slope restoration areas for
developing recommendations to control sediment transported from the slope to stream.
5. Complete the installation of surveyable markers within landslide areas suspected of ongoing movement
for future monitoring.
6. Markers and features such as cracks will be marked with paint or survey flagging for subsequent
professional land survey by PACE and incorporation onto the project base map.
7. Prepare a geotechnical report based on the requirements of TMC 18.45.040 for both landslide hazard
and erosion hazard areas to include a Critical Area Site Plan. Identify potential erosion mitigation
measures for the area affected by the landslide and suggest suitable ongoing monitoring measures.
The report will also include discussion and recommendations related to potential slope stabilization
measures to control sediment transport from landslide to stream.
8. Attendance of an Associate at four of the one hour biweekly design meetings with the City of Tukwila
and/or PACE during the execution of this phase.
9. Provide consultation and technical support to PACE during the duration of this phase related to the
final summary documentation on findings.
10. Project management, accounting and administrative support during execution of scope identified
above.
File No. 0259-061-00
82
GEOENGINEERS
City of Tukwila I November 19, 2024 Page 3
TASK 9.8. PHASE 3B WETLAND AND STREAM DELINEATIONS
The purpose of this task is to identify, document and delineate regulated aquatic critical areas (wetlands
and streams) within the Phase 3b assessment area survey limits as shown on Exhibit A. This specifically
includes:
• Review available project -specific data and publicly available wetland, stream, wildlife and soil
databases within the new areas to be surveyed.
• Complete a planning -level site visit with the City of Tukwila and PACE staff.
• Complete a site reconnaissance to identify and delineate wetlands and stream ordinary high water
mark (OHWM) within the assessment area that are protected by federal, state or local regulations.
❑ We will delineate and flag the OHWM of streams within the Phase 3b assessment area limited to
the stream section from Macadam Road South upstream to South 137th Street. Reconnaissance
level assessment of stream conditions (no OHWM delineation) will be completed upstream of South
137th Street near the intersection of 44th Avenue South.
❑ If wetlands are identified, we will flag wetland boundaries, collect wetland test plot data and rate
each wetland according to the current 2014 Washington State Wetland Rating System for Western
Washington.
❑ Wetlands and streams will be marked in the field with survey flagging for subsequent professional
land survey by PACE and incorporation onto the project base map.
• Prepare a standalone wetland report for this phase of work presenting the findings associated with the
new survey areas. Wetland and stream ratings and regulatory buffers will be included in the report and
will be based on the City of Tukwila municipal code.
• Attendance by an Associate at one hour biweekly design meetings with the City of Tukwila and/or PACE
for the duration of this phase (eight biweekly meetings).
• Provide consultation and technical support to PACE during the duration of this phase related to the
final summary documentation on findings.
• Project management, accounting and administrative support during execution of scope identified
above.
ASSUMPTIONS
• The phase duration is anticipated to be 16 weeks. Effort associated with project management and
meetings for each task identified above is based on this schedule.
• The extents of geologic/geotechnical assessment include the 43rd Avenue South right-of-way (ROW)
between approximately South 136th Street and South 137th Street.
• The City of Tukwila will provide prior documents and reports, if any, pertaining to the slide and pertinent
to the investigation.
• For geotechnical reporting, a full report may not be feasible if the extents of the project are not
determined.
• Monitoring of the markers installed as part of Task 6.4 will be scoped and performed as part of a future
task.
File No. 0259-061-00
GEOENGINEERS
83
City of Tukwila I November 19, 2024 Page 4
■ The extents of additional wetland/stream delineation areas associated with this phase of work are as
follows:
❑ Wetland and OHWM delineation will be completed from the intersection of South 137th Street and
43rd Avenue South, extending west of 43rd Avenue South approximately 100 feet, south of South
137th Street to the edge of ROW, and north from South 137th Street to Macadam Road South, as
well as north of Macadam Road South to the edge of existing ROW.
❑ Wetland and stream reconnaissance will be completed south of South 137th Street to the edge of
existing ROW and extending approximately 50 feet onto adjacent private parcels, provided right -of -
entry is obtained.
■ Wetland/stream assessment is anticipated to be completed in one field day.
■ The Professional Land Survey of the OHWM, wetland boundaries and/or surveyable landslide markers
will be provided by PACE and is not included.
■ Documentation of wetland/stream findings associated with the new survey area will be incorporated
into a new, standalone Critical Areas Report for the project.
■ This scope and fee estimate does not include any permitting associated with critical areas.
■ All support outside of the above stated scope is to be provided on a time -and -material basis under
separate authorization.
BUDGET
The fee for our services will be determined on a time and materials basis using the rates contained in our
2024 Standard Schedule of Charges, which is attached to this proposal. We will endeavor to keep you
apprised of project status and conditions that may significantly affect our scope and estimate. The total
estimated fees for the work described above are presented in the table below.
TASK NO.
TASK
ESTIMATED BUDGET
6.4 Phase 3b Geologic/Geotechnical Assessment
9.8 Phase 3b Wetland and Stream Delineation
$24,590
$29,760
Total
$54,350
There are no intended third -party beneficiaries arising from the services described in this proposal and no
party other than the party executing this proposal shall have the right to legally rely on the product of our
services without prior written permission of GeoEngineers.
File No. 0259-061-00
84
GEOENGINEERS
City of Tukwila I November 19, 2024
Page 5
This proposal is valid for a period of 60 days commencing from the first date listed above and subject to
renegotiation by GeoEngineers, Inc., after the expiration date.
Sincerely,
GeoEngineers, I
/(}CL
Nathan Otto
Project Geologist
David B. Conlin, MA, PWS
Associate
NO:ERH:DBC:US:atk
Attachments:
Exhibit A
Schedule of Charges - GeoEngineers Standard 2024
Emily R. H rn
Senior Environmental Scientist
yle J. Stone, PE
Associate Geotechnical Engineer
File No. 0259-061-00
GEOENGINEERS
85
86
Page 1 of 2
Schedule of Charges - 2024
COMPENSATION
Our compensation will be determined on the basis of time and expenses in accordance with the following schedule unless a
lump sum amount is so indicated in the proposal or services agreement. Current rates are:
PROFESSIONAL STAFF
Staff 1 Scientist
$
146/hour
Staff 1 Engineer
$
154/hour
Staff 2 Scientist
$
167/hour
Staff 2 Engineer
$
175/hour
Staff 3 Scientist
$
191/hour
Staff 3 Engineer
$
198/hour
Project Scientist 1
$
220/hour
Project Engineer 1
$
228/hour
Project Scientist 2
$
228/hour
Project Engineer 2
$
234/hour
Senior Engineer/Scientist 1
$
255/hour
Senior Engineer/Scientist 2
$
279/hour
Associate
$
292/hour
Principal
$
320/hour
Senior Principal
$
340/hour
TECHNICAL SUPPORT STAFF
Administrator 1
$
103/hour
Administrator 2
$
119/hour
Administrator 3
$
136/hour
CAD Technician
$
132/hour
CAD Designer
$
155/hour
Senior CAD Designer
$
180/hour
GIS Analyst
$
165/hour
Senior GIS Analyst
$
180/hour
GIS Coordinator
$
200/hour
*Technician
$
114/hour
*Senior Technician
$
136/hour
*Lead Technician
$
146/hour
Geotechnical Construction Specialist
$
191/hour
Environmental Database Manager
$
226/hour
Health and Safety Specialist
$
146/hour
Health and Safety Manager
$
200/hour
*Hours in excess of 8 hours in a day or 40 hours in a week will be charged at one and one-half times the hourly rates listed
above.
Contracted professional and technical services will be charged at the applicable hourly rates listed above. Staff time spent
providing expert services in disputes, mediation, arbitration and litigation will be billed at one and one-half times the above
rates. Time spent in either local or inter -city travel, when travel is in the interest of this contract, will be charged in accordance
with the foregoing schedule. A surcharge may be applied to night and weekend work. See proposal for details.
Rates for data storage and web -based access will be provided on a project -specific basis.
Associated Project Costs (APC)
Associated Project Costs (APC) equal to six percent (6%) of professional fees will be assessed. This fee allows GeoEngineers
to invest in the necessary infrastructure to ensure we provide our clients with the latest technological and data security
standards. The investments include maintaining and advancing technical tools and platforms across all aspects of our
business, and strengthening our defenses against cyber threats to ensure data remains secure. These costs are not included
in our hourly rates or direct expenses.
Schedule_GeoEngineers Standard-2024
GEOENGINEERS 87
Page 2 of 2
EQUIPMENT
Air Quality Equipment, per Day
$
210.00
Air Sparging Field Test, per Day
$
110.00
Air/Vapor Monitoring Equipment (PID, 5-Gas Meter), per Day
$
110.00
Asbestos Sample Kit, Each
$
30.00
Blastmate, per Day
$
120.00
D&M Sampler, per Day
$
150.00
DO (Dissolved Oxygen) Kit, Each
$
25.00
Dynamic Cone Penetrometer, per Day
$
45.00
E-Tape (Electric Tape), per Day
$
35.00
Electric Density Gauge, per Day
$
110.00
Electric Density Gauge, per Week
$
430.00
Electric Density Gauge, per Month
$
1,400.00
Environmental Exploration Equipment, per Day
$
225.00
Field Data Acquisition Equipment (Field Tablet), per Day
$
55.00
Field Tablet, per Week
$
200.00
Field Tablet, per Month
$
750.00
Field Tablet with Cellular, per Day
$
75.00
Field Tablet with Cellular, per Week
$
300.00
Field Tablet with Cellular, per Month
$
1,000.00
Field Gear/ Reconnaissance, per Day
$
55.00
Gas Detection Meters, per Day
$
105.00
Generator, per Day
$
110.00
Groundwater Pressure Transducer w/ Datalogger, per Day
$
55.00
Groundwater Pressure Transducer w/ Datalogger, per Week
$
220.00
Hand Auger, per Day
$
100.00
Inclinometer Probe, per Day, 1 Day minimum
$
210.00
Interface Probe, per Day
$
65.00
Iron Test Kit, Each
$
25.00
Laser Level, per Day
$
60.00
Low Flow Groundwater Sampling Equipment, per Day
$
235.00
Multiparameter Water Quality Meter, per Day
$
85.00
Nuclear Density Gage, per Hour, 1/2 Day minimum
$
15.00
Peristaltic Pump, per Day
$
50.00
pH Probe,/Meter per Day
$
20.00
PID, FID or OVA, per Day
$
130.00
Rock/Slope Fall Protection/Rigging Equipment, per Day
$
700.00
Saximeter, per Day
$
60.00
Scuba Diving Gear, per Day/per Diver
$
700.00
Shallow Soil Exploration Equipment, per Day
$
60.00
Soil Field Screening Equipment, per Day
$
20.00
Soil Sample Kit, Each
$
20.00
Steam Flow Meter, per Day
$
20.00
Strain Gauge Readout Equipment, per Day
$
50.00
Surface Water Flow Meter, per Day, 1/2 day minimum
$
50.00
Surface Water Quality Monitoring Equipment, per Day
$
50.00
Turbidity Meter, per Day
$
50.00
Vehicle usage, per Mile, or $30/half-day, whichever is greater
$
0.65
Specialized and miscellaneous field equipment not listed above will be quoted on a project -specific basis.
OTHER SERVICES, SUPPLIES AND SPECIAL TAXES
Charges for services, equipment, supplies and facilities not furnished in accordance with the above schedule, and any
unusual items of expense not customarily incurred in our normal operations, are charged at cost plus 15 percent. This
includes shipping charges, subsistence, transportation, printing and reproduction, miscellaneous supplies and rentals,
surveying services, drilling equipment, construction equipment, watercraft, aircraft, and special insurance which may be
required. Taxes required by local jurisdictions for projects in specific geographic areas will be charged to projects at direct
cost.
Per diem may be charged in lieu of subsistence and lodging.
Routinely used field supplies stocked in-house by GeoEngineers, at current rates, list available upon request.
In-house testing for geotechnical soil characteristics at current rates, list available upon request.
All rates are subject to change upon notification.
88
Schedule_GeoEngineers Standard-2024
GEOENGI N EERS
CITY OF TUKWILA CAPITAL PROJECT SUMMARY
2023 to 2028
PROJECT: S 131st Place Drainage Improvements Project No. 91641204
DESCRIPTION: Design and replace an existing 36" culvert under S. 131st PI. Raise the roadway approximately 18" and/or
provide a concrete wall or other means to keep Southgate Creek within its banks during storm events.
JUSTIFICATION: Southgate Creek overtops its bank several times per year during storm events and runs through private property.
Debris is deposited within a private driveway and storm system.
STATUS: Maintenance is performed annually on the creek to remove excess sedimentation to reduce the likelihood
of flooding.
MAINT. IMPACT: Reduce the frequency of stream sediment removal and storm cleanup.
COMMENT: Project will require an HPA. Will consider combining with a future overlay project to reduce overall costs.
A grant request for $200K was submitted to the KCFCD in 2020.
FINANCIAL Through Estimated
(in $000's)
2021 2022
2023
2024
2025
2026
2027
2028
BEYOND TOTAL
EXPENSES
Design
100
421
521
Land (R/W)
250
250
Const. Mgmt.
400
400
Construction
2,000
2,000
TOTAL EXPENSES
0
100
671
2,400
0
0
0
0
0
3,171
FUND SOURCES
Awarded Grant
60
60
120
Proposed Grant
300
1,600
1,900
Mitigation Actual
0
Mitigation Expected
0
Utility Revenue
0
40
311
800
0
0
0
0
0
1,151
TOTAL SOURCES
0
100
671
2,400
0
0
0
0
0
3,171
,,,
,'
Project Location
.
n
li;
r
P`---.-
igg
%alb , •,1.0.4
vigil
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jail
8EA1--
19ir_r��
9150
i
T
JE
S 159
$[
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Et `1 7ukwua Pkrn - _
2023 - 2028 Capital Improvement Program
accii exa m
85
89
90
CITY OF TUKWILA 2025-2030 CAPITAL IMPROVEMENT PROGRAM
CITY OF TUKWILA CAPITAL PROJECT SUMMARY
2025 to 2030
PROJECT:
S 131st Pt Drainage Improvements
Project Manager Joshua Hopkins
DESCRIPTION:
JUSTIFICATION:
STATUS:
MAINTENANCE IMPACT:
COMMENT:
Project # 91641204
Department Surface Water
Developing alternate horizontal alignment for Southgate Creek in conjunction with replacing a fish barrier
culvert. Scope expanded in 2024 to increase hydraulic analysis limits to address persistent flooding not
addressed with the preliminary hydraulic design.
Southgate Creek overtops its bank several times per year during storm events and runs through private
property.
Debris is deposited within a private driveway and storm system.
HPA permitted dredging is performed annually on the creek to remove excess sedimentation to reduce the
likelihood of flooding.
Project will include 1-year contract maintenance and typically 2-to-4 years of plant establishment. Project
improvements will be turned over to surface water division for routine maintenance.
Project applied for Department of Ecology design development funding and Conservation Futures property
acquisition grant to support the expanded hydraulic analysis. Assumes estimated 2028 construction.
FINANCIAL (in thousands)
Project Costs
Project Mgmt (Staff Time/Cost)
Planning
Land (R/W)
Construction Mgmt.
Construction
Total Project Costs
Project Funding
Awarded Grant
Proposed Grant
Utility Revenues
Total Project Funding
2025
$ 25
$ 780
$ 1,000
$
$ 1,805
$ 706
$ 1,105
$ 205
$ 2,016
2026
$ 25
$ 600
$ 1,000
$ 1,625
$ -
$ 1,625
$ -
$ 1,625
2027
2028
$ 25
$ -
$ -
$ 400
$ 2,000
$ 2,425
$ -
$ 1,600
$ 825
$ 2,425
2029
2030
Beyond
TOTAL
75
1,380
2,000
400
2,000
5,855
706
4,330
1,030
6,066
MEIN
91