TECHNICAL SCOPE OF SERVICES FOR PRELIMINARY DESIGN OF THE EAST SIDE CSO TUNNEL PROJECT, BES PROJECT NO. 5516

 

 

The engineering design of the East Side CSO Tunnel Project consists of the design for a tunnel of approximately 17 to 22 foot inside diameter on the east side of the Willamette River that will provide relief to the existing east side interceptor system as well as providing storage during larger storm events. The tunnel is part of a system being built to meet the requirements for the Amended Stipulated Final Order (ASFO) entered into by the City of Portland with the Oregon Department of Environmental Quality in August 1994. This scope of services is for the preliminary design (30% design) of the tunnel. Final design services will be negotiated later, upon acceptable completion of preliminary design services.

 

The proposed East Side CSO Tunnel will transport required flows from service areas on the east side of the river to the Columbia Boulevard Wastewater Treatment Plant. The tunnel will extend from the vicinity of SE Insley Street, proceeding north paralleling the river to a connection with the West Side CSO Tunnel on Swan Island, near N. Port Center Way. It will intercept overflows from sewer outfalls serving the Insley (OF-28), Division (OF-31), Taggart (OF-30), Alder (OF-33, 34, 35, & 36), Stark (OF-37), Oak (OF-38), Sullivan (OF-40), Holladay (OF-41), Wheeler (OF-43), and Beech-Essex (OF-44A & 46) basins that currently discharge to the Willamette River. The tunnel will operate as part of the overall Willamette CSO System that includes the West Side CSO Tunnel, the Swan Island Pump Station, the Peninsular Forcemain, and the Portsmouth Forcemain.

The purpose of the preliminary engineering design is to evaluate the benefits of alternative horizontal tunnel alignments. Alternative profiles will be evaluated to determine the hydraulic performance of the East Side CSO Tunnel alternatives and how they will operate as part of a system that includes the West Side CSO Tunnel and the Swan Island Pump Station.

 

BES, by means of the separate but associated CSO Flow Management Pre-design Project, will provide dry weather and wet weather inflows to the tunnel system and recommend an appropriate tunnel size for a cost effective storage and transport system. PB will refine and optimize the tunnel size through hydraulic analysis work. PB will analyze the hydraulically connected interceptor system using several design storms, including the BES water quality storm, the ASFO 3-year summer design storm, the 25-year design storm, the historically representative 1982-87 period, as well as operations during dry weather. BES will analyze long-term performance of the system using a 25-year historical rainfall record (1977-2001).

 

PB will refine existing Spine Models (Willamette CSO Tunnel System, Interceptor System, CSCC, and CBWTB) developed by BES to quantify and characterize flows into, through and out of the tunnel system and optimize the performance of the East Side CSO Tunnel operating as part of an overall system incorporating the West Side CSO Tunnel and the Swan Island Pump Station. The Spine Model is a DHI MOUSE model of the Willamette CSO tunnel and interceptor systems developed for the West Side CSO Tunnel design. PB will use the Spine Model to examine the proposed interceptor/tunnel system performance using the storms for the East Side CSO Tunnel alignments. Scenarios to be analyzed include: the impact of alternative vertical and horizontal configurations of the East Side Tunnel for the functionality of the overall system; the filling and emptying process for the tunnel; establishing inflow points and emptying locations that minimize hydraulic transients; low flow conditions; and, operation and maintenance features.

 

Using the results from these hydraulic analyses and criteria developed during the project for siting of shafts, dropshafts and surface pipeline requirements such as alignment, profile, drop shaft locations, venting, access, monitoring and control, flow capacity, required slope, diameter, and venting will be established. Of particular importance is the understanding of total system operations and how this final major component can be incorporated into the system to meet multiple operational requirements including: increasing total storage and/or decreasing pumping costs while meeting CSO control requirements; benefits of real time control operation recommendations; and creating a less variable flow condition at the Columbia Boulevard Wastewater Treatment Plant by shaving peak flows.

 

The detailed scope for the East Side CSO Tunnel Project Design follows:

 

PRELIMINARY DESIGN

 

Task 1: Initial Data Collection

Objective: To identify and compile the following existing data as input to support the design process: cultural resources, permit requirements, land ownership, existing surveys, utility locations, and traffic control information.

 

PB will undertake an initial assessment of the project area to identify potential fatal flaws that could impact or eliminate tunnel alignment alternatives identified in the 10% pre-design report. The results from this assessment will be presented in the initial design workshops (Task 14.01).

 

Following the initial assessment, PB will collect available data relating to the alignment alternatives being investigated. Once the data are collected, PB will make an assessment of potential issues that need to be addressed, decisions that need to be made, timing of the decisions; establish “to do” lists; and identify possible constraints that could impact the subsurface site investigations.

 

01.01 Historical/Cultural Resource Assessment – PB will review available historical records to identify cultural resource sites along the tunnel alignment alternatives. This task will also provide information to aid in assessing potential impacts to the project.

 

PB will evaluate potential impacts to cultural resources, and identify possible options for mitigation of adverse effects. Assessment efforts will include a records search and surface survey to locate both surface and subsurface resources. Assessment efforts are to be directed toward meeting federal and state compliance requirements, as well as providing information on structural remains and materials likely to be encountered during construction of tunnel and shafts.

 

01.01.01  Consultation and Coordination

PB will consult and coordinate with various interested parties – particularly the Oregon State Historic Preservation Office (SHPO) during the investigation. Although prehistoric sites are not as likely to be encountered in the project area as historic resources, PB will initiate consultation with the Tribal representatives of three tribes (Confederated Tribes of Grand Ronde, Confederated Tribes of Warm Spring Indians and Confederated Tribes of Siletz Indians) to elicit information on potential site locations. The outcome of consultations will be documented.

01.01.02  Literature Review and Overview

PB will review available literature and documentary sources pertaining to archaeological, ethnographic and historic resources in the specific areas of impact. Using insurance map data, PB will reconstruct the configuration of streets, wharves, bridges and buildings from the late nineteenth century onward. Other map data available in archives at the Army Corps of Engineers, City of Portland and the Oregon Historical Society will be reviewed. Under this task, the historical information will be used to locate historical archaeological resources that may be affected by the project as well as to assist in the evaluation of standing structures along project alignment alternatives.

 

01.01.03  Visual Field Survey

As an initial step in conducting the cultural resource study, PB will conduct a visual survey of the project area. Because of the urbanized nature of the project alignment, it is not likely to locate prehistoric sites but it will help in identifying standing structures on the National Register of Historic Places and those that may be potentially added during project life. Specific structures to be avoided will be identified. Potentially significant bridges, buildings or sites must be identified before a determination of project effect can be made.

 

01.01.04  Report Preparation, Compliance Documents and Planning Needs

PB will prepare a Technical Memorandum (TM) on the document search and field report in accordance with SHPO requirements. The TM will include the results of the records review as well as detailed results of the field survey, including methodology, observations and recorded finds. Any site forms and site form updates will be appended to the TM.

PM will prepare a TM that documents, as appropriate, recommendations and options regarding potential impacts of the East Side CSO Tunnel Project on historical/cultural resources.

 

Deliverables:

01.01.A – Draft TM summarizing the location, size, age, and nature of the sites identified.

01.01.B – Final TM summarizing the location, size, age, and nature of the sites identified.

01.01.C – Draft TM summarizing the potential impacts of the project on the historical/cultural resources identified and recommendations.

01.01.D – Final TM summarizing the potential impacts of the project on the historical/cultural resources identified and recommendations.

 

01.02 Permitting Plan for Each Alternative

 

01.02.01  Permit Scoping and Checklist

PB will collect information, review, and carry out an initial field reconnaissance of each of the potential alignments for potential impacts to utilities, railroads, wetlands, sensitive or listed species, and other potential permitting issues. PB will also identify additional permit-related studies such as Impact Evaluations, Wetland Delineations, and Mitigation Plans that may be required. PB will prepare a checklist of possible local, state, and federal permits; utility permits and easements; and related permitting requirements.

 

01.02.02  Agency Contacts and Permitting Plan

PB will arrange for early contacts and meetings with regulatory agencies, and arrange pre-application conferences and interagency meetings, where appropriate. PB will develop a comprehensive permit plan that will identify project permit needs including permit sequencing, requirements, and criteria; administering agency and contact information; data needs with sources and schedules; target submittal dates; review timelines; permit fees; lead consultant; and planned team and agency meeting dates. This subtask includes regular team coordination meetings and contacts, particularly on other permit related work tasks. Some field checking of alignment alternatives and up to 10 agency meetings are anticipated during this task.

 

PB will prepare a Technical Memorandum that includes a permit plan with a comprehensive matrix of permit needs, requirements, and criteria; administering agency and contacts; information needs (including permit-related studies); critical path schedule with target permit submittal dates; review timelines; and planned design team and agency coordination schedule. The TM will also summarize the coordination efforts and meetings that have occurred to date.

 

01.02.03   Key Permit Issues for Early Action

PB will identify critical permit issues or permit components that may be critical path items. PB will develop a focused acquisition strategy and schedule for each critical path permit, detailing specific tasks and subtasks to be completed, by whom, and when building in time for adequate review time for BES and regulatory/permit agencies. PB will coordinate activities within the design team to consider alternative planning and/or schedule options that may resolve any anticipated permit issues or schedule conflicts.

 

01.02.04   Coordination and Facilitation

PB will establish contacts and coordinate the early review of preliminary plans with applicable regulators and utilities to facilitate review processes and/or initiate extended-period review processes (City PDOT/Water Bureau, utilities).

 

01.02.05  Coordination with Railroads

PB will establish contacts and coordinate early review of preliminary plans with UPRR railroad to facilitate access to railroad properties for field investigations and identify potential impacts from the project.

 

Deliverables:

01.02.A – Draft TM outlining the permits required for the project.

01.02.B – Final TM outlining the permits required for the project including a matrix of permit requirements with estimates of timelines, costs, dependencies, and who is responsible for preparation and approval.

01.02.C-X – Minutes of meetings with UPRR.

 

01.03 Right of Way and Land Acquisition Assessment

PB will assess the type and size of rights-of-way and easements needed for alignment alternatives. BES will provide an initial database of property ownership and occupancy information and tax assessor’s maps for affected properties as identified along proposed alignments as provided by PB. PB will then maintain and update the property ownership database. PB will provide input on estimating easement and property costs in the property ownership database.

 

Deliverables:

01.03.A – Map of alignments and indication of affected properties. (PB)

01.03.B – Excel database of property ownership information (property ownership database) of affected properties for each alignment. (BES)

01.03.C – Updated property ownership database of properties along alignment affected with cost estimates and timelines for each alternative alignment. (PB)

 

01.04  Survey Coordination

01.04.01  Survey requests

PB is to coordinate with the BES Project Manager to obtain the necessary base maps and property maps for the project area. A start-up meeting will be held between BES and PB within 10 calendar days of NTP to define the survey requirements. Additional survey requests, as they are determined, will be made to the BES Project Manager, as necessary. The City will provide the actual survey services. Information to be provided by City’s GIS within within 90 calendar days of NTP consist of:

a)  Quarter section maps covering the alignment alternatives established at the Initial Design Workshops.

b)  Available Land Use and zoning maps.

c)  Existing City utility maps.

d)  Right-of-way maps.

 

Once an alignment has been selected, BES will survey the alignment to include:

a)  A set of horizontal and vertical control points to be used for field investigations and construction.

b)  Traversing the site and locating physical features such as curb lines, sidewalks, edges of asphalt, break lines, top and toes of banks, edges of water, buildings, underground utilities, surface features of vaults, and manholes, bridge piers, signs, miscellaneous structures, railroad tracks, trees, shrubs, landscaping, and sufficient ground shots to produce a 2-foot contour map.

c)  Providing property maps and computations for the writing of easements and/or property purchases or leases.

d)  Providing a DXF or DWG file and ASCII file for all survey data.

 

Additional Survey services to be provided by the City consist of:

a)  2001 or later aerial photographs of the east side of the Willamette River from Ross Island to Swan Island covering the proposed East Side CSO project area.

b)  Establishing property lines from located monuments for maps, and legal descriptions.

 

01.04.02  Property Identification and Descriptions

PB will provide up to 40 property maps indicating the property acquisition or easement needs. From this, BES will provide property maps with existing property monuments, legal descriptions, and exhibit maps (to accompany legal descriptions) for properties identified by PB along the tunnel alignment.

 

Deliverables:

01.04.A-X Written Requests for surveys.

01.04.B – Updated Excel property Ownership Database along preferred. (PB)

01.04.C – Property identification, descriptions, maps for easements and properties identified for acquisition along the selected alignment.

01.04.D – Easement and property acquisition exhibits to include property maps, legal descriptions, and accompanying exhibit maps.

01.04.E – Up to 40 property appraisals.

 

01.05  Utility Identification and Relocation Plan

 

01.05.01   Initial Utility Identification and Relocation

PB will:

•  Review and verify specific characteristics and locations of existing utilities for the tunnel alternatives using the pre-design initial list of existing utilities provided by BES. PB will then maintain and update the list.

•  Identify utility conflicts that present a fatal flaw to alignment alternatives at the Initial Design Workshops.

•  Maintain an as-built file with copies of all as-built records and a log of file contents.

01.05.02   Develop Master Utility List

PB will develop a Master Utility List of existing utilities by expanding and updating the initial pre-design list with utility agencies that did not respond to the pre-design utility survey or were otherwise not included. PB will also identify utility agencies to determine whether all known utilities are indicated on the project plans and profiles. This will include private utilities encountered. PB will generate a log of physical conflicts between utilities and tunnel/shafts/pipelines as well as identify potential impacts and describe potential alternative mitigation measures.

 

PB will use the utilities identified in the utility list to ensure that all known utilities are indicated on the project plans, profiles, and sections. PB will use the conflict log to coordinate utility relocations (that may be prepared by the utility agencies or by the final design team) and to note any utilities that may require special protection during construction of tunnel, shafts or pipelines. As the project design progresses, PB will:

•  Update the affected utility agencies of the design status.

•  Maintain an open, ongoing exchange of information with the agencies to facilitate the future relocation activities during construction.

•  Locate utilities for the subsurface site investigation program.

•  Maintain a Utility Locate File with a log of the source of utility locate (GIS, One-Call, as-builts, survey, potholes), any utility location disagreement arising from differing information sources, and resolution of location discrepancies. Utility locations will be referenced to plan/profile sheets.

•  Using the secondary utility list, develop a relocation plan for utilities directly impacted by the tunnel and appurtenant facilities construction.

 

This work includes identification of who will design and/or implement specific utility relocations, coordination of utility relocations prepared by the utility agencies, documentation of utility relocations, and coordination with utility agencies to facilitate the future relocation activities during construction.

 

Deliverables:

01.05.A - PB’s “Alignment Study, June 2001” list of existing utilities (BES)

01.05.B – Presentation materials of utility conflict evaluation for the Initial Design Workshops

01.05.C – As-built file and log of file contents

01.05.D - Master and Secondary Utility Lists of existing utilities – updated database.

01.05.E - Utility Locate File documenting the source(s) of the utility locate, any information conflicts, and their resolution of discrepancies.

01.05.F - Draft TM on impact of tunnel alternatives on existing utilities and plan for utility relocation to include conflict log, utility coordination requirements, cost and schedule impacts.

01.05.G Final TM on impact of tunnel alternatives on existing utilities and plan for utility relocation to include conflict log, utility coordination requirements, cost and schedule impacts.

 

01.06 Initial Traffic Control Plan – PB will review existing traffic counts provided by the City along the tunnel alignment alternatives and meet with PDOT and BES to discuss the project and possible shaft locations. Traffic flows and patterns will be established at potential construction locations for shafts and pipelines. This task will also provide assistance in developing traffic control plans for the subsurface site investigations.

 

Deliverables:

01.06.A Draft TM summarizing information collected.

01.06.B Final TM summarizing information collected.

01.06.C Draft TM on assessment of future traffic control needs.

01.06.D Final TM on assessment of future traffic control needs.

 

01.07  Coordination with Ongoing Projects – PB will identify and coordinate with ongoing projects and planning for the inner East Side, such as the Portland Development Commission (PDC) Central East Side Plan, East Side Light Rail, Oregon Department of Transportation (ODOT) Martin Luther King (MLK) Blvd-Grand Street Viaduct Reconstruction, Portland Bureau of Water Works (BWW), Portland Department of Transportation (PDOT), BES, and other known proposed developments in the area of the project. PB will attend up to 10 meetings with agencies. In addition, PB will coordinate with the West Side CSO Tunnel and Pump Station construction project. BES will provide mapping of upcoming wastewater/stormwater projects to PB.

 

Deliverables:

01.07.A – Draft TM summarizing issues identified with adjacent projects and any recommended actions to be taken by the City or actions needed to be included in the final design.

01.07.B - Final TM summarizing issues identified with adjacent projects and any recommended actions to be taken by the City or actions needed to be included in the final design.

01.07.C-X - Meeting Minutes for interagency meetings.

 

01.08  Data Collection Management – PB will provide general oversight of the data collection tasks and provide an initial fatal flaw review of the data/data collection management process to be presented at the Initial Design Workshops.

 

Deliverables:

01.08.A – Presentation at Initial Design Workshop.

 

Task 2: Subsurface Site Investigations

Objective: To design and implement a subsurface investigation that will provide data to develop a geologic profile and determine subsurface conditions along the alignment. PB’s approach will include:

 

Phase I: Review of existing geologic and historic data to narrow alignment choices.

Phase II: Preliminary drilling to investigate major shaft locations and potential areas of concern along alignment alternatives.

 

02.01 Historic Assessment– Using maps, photographs, written history, and oral history documented under Subtask 01.01, PB will locate potential obstructions including old bridge, dock, and building foundations, as well as identifying infilled streams, lakes, and swamps that may contain logs, boulders, landfills, Waverly Basalt, and fill debris.

 

Deliverables:

02.01.A – Draft TM outlining the potential buried obstructions along the tunnel alignment alternatives.

02.01.B – Final TM outlining the potential buried obstructions along the tunnel alignment alternatives.

02.01.C – Draft TM outlining the potential buried obstructions at up to14 shaft locations identified for the selected alignment.

02.01.D – Final TM outlining the potential buried obstructions at up to 14 shaft locations identified for the selected alignment.

 

02.02 Prepare Geological Assessment and Geotechnical Exploration Program – PB will carry out a comprehensive review of existing geologic and subsurface information along the alignment, including evaluating borehole logs available from BES geotechnical investigations, bridge structures, buildings, water wells, and monitoring wells to augment the data presented in the 10% design study. PB will use the geotechnical database previously compiled as part of the Willamette River CSO Predesign Project. PB will contact agencies, firms, professional societies, municipalities, and universities who may have available pertinent information of the project area.

 

Geologic profiles will be constructed for each of the alternative alignments that will also identify potential problem areas. PB will produce a geologic assessment of the entire project area and establish a project-wide classification system for subsurface units consistent with the West Side CSO Project classification system.

 

PB will coordinate the geotechnical exploration program. Based on the historic assessment and the desk study of existing subsurface information, PB will plan a Phase II subsurface investigation program for BES approval. Any boring location changes greater than 10 feet from the boring plan of the subsurface investigation program shall be reviewed and approved by the BES PM or BES Geotechnical Investigations Task Lead prior to the change being made.

 

The geotechnical plan will describe all major aspects of the subsurface investigation program including:

•  The drilling contractor’s operations and procedures, procedures for inspection, and laboratory testing requirements

•  Suitable scaled plans showing boring and observation well locations with estimated depths and including the identification of any special borings for undisturbed sampling or in situ testing. The plans will show the location of any previous borings.

•  Specifications for drilling services, laboratory testing, soil and groundwater sampling, and analysis.

•  An updated schedule and cost estimate for the program.

•  Access and permitting considerations.

•  Protocol for obtaining and distributing DWR confirmations.

 

Deliverables:

02.02.A – Draft Geologic Assessment including geologic profiles with data locations identified.

02.02.B – Final Geologic Assessment including geologic profiles with data locations identified.

02.02.C – Draft Phase II Geotechnical Exploration Program Plan.

02.02.D – Final Phase II Geotechnical Exploration Program Plan.

 

02.03  Field Exploration Program

02.03.01 Health and Safety Plan

PB will develop a Health and Safety Plan prior to the start of the field investigation. This plan will describe the safe operations and procedures during the drilling of the geotechnical borings. The plan will identify all key personnel and their respective phone numbers for both PB and BES. All personnel on site will be required to have read the plan and signed an acknowledgement of their understanding.

 

This plan will also identify any known or suspected subsurface contamination and describe monitoring procedures for personnel safety. A procedure will be outlined in the event that contamination is found in unsafe concentration levels for worker safety.

 

02.03.02 Geotechnical Field Manual

PB will develop a geotechnical field manual prior to the start of the field investigations. The manual will describe the methods for identifying and classifying the subsurface materials encountered such that different personnel maintain a consistent approach to logging of borings.

 

02.03.03 Obtaining Drilling Permits

PB will develop traffic control plans during subsurface investigations and through its drilling subcontractor, obtain permits or other public or private property easements, including railroad permits that may be necessary to access the exploration sites. PB is to coordinate with the drilling contractor to see that environmental permits and police and fire details, if required, are retained to perform the subsurface explorations.

 

Prior to initiating the field investigation, PB will coordinate as-built utility maps and selection of appropriate boring locations. Traffic plans are to be reviewed and approved by the City of Portland PDOT Bureau of Traffic Management before street drilling begins.

 

PB will contact the Oregon Utility Notification Center to mark underground utilities in rights-of-way near boring locations. PB will locate and mark underground utilities on private property (if any) using a private locate service.

 

PB will provide planning and coordination for groundwater monitoring. Monitoring wells are assumed to be used to monitor groundwater during construction. Costs to abandon wells will be included within the construction budget.

 

PB will contract with a local flagging company to provide traffic control for borings conducted on City streets. PB will retain two flaggers with the appropriate signs and cones, as per the traffic control plan for each of the street borings. The cost is a field equipment expense and reimbursable as an allowable direct expense.

 

PB will attempt to obtain rights-of-entry for up to 8 private properties for the subsurface site investigation program. PB will perform preliminary property owner contacts, prepare rights of entry for signature using approved formats. Copies of signed rights of entry will be provided to team members along with information about property owner contacts and any conditions precedent to getting on the properties. The estimated hours assume coordination/negotiation with other governmental agencies.

 

02.03.04 Phase II Drilling Program

The proposed Phase II boring program consists of the following:

•  Three (3) rotosonic borings at major shaft locations. Borings will extend 100 feet below the base of the shaft or 20 feet into bedrock, whichever is shallower.

•  Five (5) rotosonic borings along selected alignment alternative. Borings will extend 15 feet below tunnel invert.

•  Nineteen (19) mud rotary borings along selected alignment alternative. Borings will extend 15 feet below tunnel invert except at shaft locations. At shaft locations, mud rotaries will extend 10 feet into gravel.

 

PB will drill borings using appropriate traffic control and railroad flagging (if required); install and develop monitoring wells; conduct in situ permeability testing; and monitor methane levels in samples, air space volatiles, and obvious contamination during drilling. All borings will be continuously logged to identify soil properties, drilling conditions/difficulties, and geologic contacts.

 

Rotosonic borings will recover continuous core that will be boxed and photographed.

 

Mud rotary borings will conduct Standard Penetration Testing (SPT) every 5 feet and every 2.5 feet in within one diameter of the tunnel springline. Relatively undisturbed (Shelby tube) samples will be obtained in each mud rotary boring, where appropriate and if possible.

 

Groundwater monitoring wells will be installed in selected rotosonic and mud rotary borings.

 

CPT soundings will obtain seismic shear wave velocity every 5 feet.

 

Borehole samples will be transported to and stored in a sample storage area for a period of 2.5 years and then transferred to BES. During drilling, cuttings will be drummed, tested, and disposed of in an appropriate manner. Drums will be stored temporarily in a fenced storage area until testing is completed and removed from site within 60 days. A secure rotosonic drilling staging area will be located for equipment and supply storage. No environmental soil or groundwater samples will be collected during geotechnical drilling. However, when suspicious stains, films, and odors are observed during drilling, an approved protocol will be followed. The protocol will be prepared by PB (and included in the Health and Safety Plan to be approved by BES). It will describe the personnel to be informed and the information to be recorded.

 

Requests for survey of boring locations will be submitted to BES (as part of Subtask 1.04) at the end of the Phase II Exploration Program.

 

Deliverables:

02.03.A - Draft Health and Safety Plan.

02.03.B - Final Health and Safety Plan.

02.03.C – Draft Geotechnical Field Investigation Manual.

02.03.D – Final Geotechnical Field Investigation Manual.

02.03.E-X - Copies of permits and right-of-entry permission.

02.03.F-X - Weekly summary sheets.

02.03.G – Drill holes as documented by field boring logs.

 

02.04 Groundwater Analysis – Monitoring wells will be installed in up to 12 borings. The borings will be at selected shaft locations and at locations along the alignment to provide a representative assessment of groundwater levels. Seasonal groundwater levels will be measured every two months in monitoring wells over a 12-month period. In situ permeability testing (falling head, slug, and packer testing) will be conducted in geologic units during and after drilling at shaft locations to obtain project wide permeability values for geologic units. Permeability data will be compared with permeability ranges identified in local groundwater literature. Lag time testing will be performed in monitoring wells to determine ground water velocity.

 

Deliverables:

02.04.A – Draft TM identifying groundwater levels, measured and published permeability ranges for project area geologic units.

02.04.B - Final TM identifying groundwater levels, measured and published permeability ranges for project area geologic units.

 

02.05 Seismic Hazard Evaluation – PB will conduct a review of potential seismic hazards along the final alignment to assess the potential for surface rupture, liquefaction, lateral spreading, site amplification, and seismically included slope failures. The mapped location and probable activity of local faults will be identified.

 

Deliverables:

02.05.A –Draft TM identifying potential seismic hazards and the potential impact on the tunnel and shafts.

02.05.B –Final TM identifying potential seismic hazards and the potential impact on the tunnel and shafts.

 

02.06   Preliminary Geotechnical Data Report - PB will compile a summary of exploration techniques, material descriptions, drilling logs, monitoring results, testing data, and core photographs in a preliminary GDR.

 

02.06.01 Prepare Borehole Logs

PB will prepare the boring logs for inclusion in the Preliminary and Final Geotechnical Data Reports. The logs will be developed using gINT software with a project specific format. The logs will include street locations, coordinates, well tag numbers, soil descriptions, a graphic log, soil classifications, sampling locations, groundwater level, if available, blow counts, and laboratory data.

 

02.06.02 Conduct Lab Testing

PB will develop a geotechnical laboratory-testing program. The program will include laboratory index, strength, and consolidation testing on borehole samples as appropriate to confirm field soil classifications and performance tests to establish tunnel, shaft, and foundation design criteria. Gravel gradations and strength and abrasivity testing will be performed on cobbles from large diameter borings. Chemical testing, exclusive of environmental analytical testing, will be conducted on selected soil and water samples.

 

Laboratory tests are to be conducted in general accordance with appropriate American Society for Testing and Materials (ASTM) standards. For planning purposes, assume the following laboratory tests will be completed:

395 Moisture content tests (ASTM D2216)

60 Density tests (ASTM D216)

214 Sieve analysis including percent fines (ASTM D422)

56 Hydrometer tests (ASTM D422)

87 Atterberg limit tests (ASTM D4318)

12 Unconfined compressive tests (ASTM D2166)

5 Consolidation tests (ASTM D2435)

10 sets of chemical tests for soil samples (pH, chlorides, sulfates, redox potential, resistivity)

10 sets of chemical tests for groundwater samples (pH, chlorides, sulfates, Total Dissolved Solids, Total Solids, Total Suspended Solids, Conductivity, Nitrates)

 

02.06.03 Prepare Geotechnical Data Report

Upon completion of the subsurface exploration and laboratory testing for Phase II, PB will prepare a draft Geotechnical Data Report that presents the information previously assembled, the results of geological and geotechnical field and laboratory testing, and any existing geologic and geotechnical data collected in the project area. The report will include detailed descriptions of the field exploration and laboratory testing methods, and figures identifying project location and boring locations. Boring logs, as well as field and laboratory test results, will be presented in appendices. The report will also contain any relevant field and laboratory data collected by others included as an appendix in the report. PB will provide five copies of the report to BES.

 

Following completion of the subsurface investigation and final documents, electronic versions (gINT) of the borehole logs and associated laboratory data will be submitted to the City of Portland Materials Testing Laboratory for inclusion in the geotechnical database.

 

Deliverables:

02.06.A Preliminary Geotechnical Data Report including borehole and CPT logs and laboratory testing results for Phase II exploration program.

02.06.B Geotechnical Data Report for the preliminary design including borehole and CPT logs and laboratory testing results for Phase II and III exploration programs.

 

Task 3 - Environmental Investigations

Objective: Identify major contaminated media issues that could materially affect the selection of the final shaft locations and tunnel alignment.

 

03.01 Review of Existing Environmental Data and Information

PB will review existing environmental information to identify potential major contaminated media issues that could materially affect the selection of the final shaft locations and tunnel alignment. The existing environmental information review will include review of the Limited Phase I Environmental Corridor Assessment prepared by BES and obtaining and reviewing Sanborn Fire Insurance Maps and city directories for the candidate shaft locations. The information review will also include reviewing DEQ environmental cleanup files for up to five sites located in the areas of the candidate shaft locations. A technical memorandum summarizing the results of the existing environmental information and identifying major contaminated media issues at the candidate shaft locations will be prepared.

 

Deliverables:

03.01.A – Draft TM summarizing review of the Limited Phase I Environmental Corridor Assessment and identifying major contaminated media issues at candidate shaft sites.

03.01.B – Final TM summarizing review of the Limited Phase I Environmental Corridor Assessment and identifying major contaminated media issues at candidate shaft sites.

 

03.02 Sampling and Analysis at Candidate Shaft Locations

 

Once candidate shaft locations are determined and potential major environmental issues identified, soil and groundwater sampling will be performed at up to five candidate shaft locations. Push probe explorations at candidate shaft locations will be advanced 30 feet (or depth of fill, whichever is deeper). Based on anticipated fill depths of greater than 30 feet at some candidate shaft locations, the average depth of the shaft push probes is assumed to be 50 feet. Features of Concern, other than fill, suggesting contamination to depths greater than 30 feet are not anticipated at the candidate shaft locations.

 

If contamination is evident at the 30 or 50-foot probe depths, probes will be continued to depths where contaminants are no longer evident.

 

Soil samples will be collected at depths of 1, 5, and 10 feet and every 10 feet thereafter to the bottom of the push probe. Soil samples will be analyzed for petroleum hydrocarbons, PCBs, and metals. Headspace measurements and field observations for evidence of contamination (sheen, discoloration, odor) will be performed on the soil samples and documented. Groundwater samples will be collected in push probes that encounter groundwater. The groundwater samples will be analyzed for volatile organic compounds. Laboratory analysis will be performed by the City of Portland Bureau of Environmental Services Water Pollution Control Laboratory. Costs for the laboratory analysis are not included.

 

A Health and Safety Plan and Sampling and Analysis plan will be prepared prior to performing the push probe investigations. If necessary, street use permits will be obtained and traffic management plans prepared. PB will also coordinate necessary and proper management of Investigation Derived Wastes (IDW).

 

Once analytical data is received from the laboratory, the data will be entered into a database for development of report tables and technical analysis of the data.

 

A technical memorandum will be prepared presenting the results of the initial five candidate shaft push probe explorations. The memorandum will include a figure showing the explorations locations, a description of the soil and groundwater conditions encountered, the results of headspace measurements, and tables presenting the results of the laboratory analysis. The extent of contaminated soil presumed from the push probe results and the estimated associated cost to manage the contaminated soil will be presented. Logs of the push probe and laboratory reports will be attached to the memorandum.

 

Task 03.02.01 will also include coordination with the geotechnical investigation personnel regarding the observations for contaminated media performed during the geotechnical investigations. PB will provide staff to observe and collect samples as needed in areas of suspected or known contamination. Observations of evidence of contaminated soil will be obtained from the project geotechnical personnel and included, as relevant, in the technical memorandum.

 

03.03 Status and Coordination Meetings

Environmental task lead or their designated representative will meet weekly with BES Special Waste Group staff during the preliminary engineering phase of the project to facilitate efficient coordination and completion of the preliminary engineering environmental investigation tasks.

 

Deliverables:

03.02.A – Draft Health and Safety Plan

03.02.B – Final Health and Safety Plan

03.02.C – Draft Sampling and Analysis Plan

03.02.D – Final Sampling and Analysis Plan

03.02.E – Draft TM summarizing environmental conditions at candidate shaft sites.

03.02.F – Final TM summarizing environmental conditions at candidate shaft sites.

 

03.04 Contingency Sampling and Analysis

If the results of the initial five investigations candidate shaft locations indicate that additional shaft locations are appropriate and at the direction of the BES PM or Public Environmental Assessment Task Manager, PB will perform up to an additional five push probe explorations at candidate shaft locations. The additional push probe explorations will be performed using the same procedures as for the initial five shaft push probes listed in Subtask 03.02.01. A separate technical memorandum will be prepared at the conclusion of the additional push probe investigation program.

 

Task 4: 30% Preliminary Design

Objective: To develop an integrated East Side system plan that includes the preferred tunnel plan and profile; ROW needed for shaft construction; the optimum tunnel size, slope, and drop shafts sizes for system hydraulics; consolidation conduits; and significant risk issues identified for mitigation during final design or construction.

 

04.01  Hydraulic Modeling and System Optimization

04.01.01  Preliminary Design – Hydraulic Modeling and System Optimization

PB will perform a review of the SPINE model, data, and technical assumptions that define the hydraulic characteristics and contributing flows to the tunnel system.

 

PB will coordinate with the ongoing BES activities and the Flow Management Project (FMP) by meeting on an approximately monthly basis with the FMP team. PB will develop a protocol for incorporating modifications to the model provided by BES to PB (anticipated to occur in May 2003).

 

The hydraulic modeling team will provide input to the PB design team regarding recommended drop shaft locations and configuration requirements. Recommendations will be based on hydraulic analysis results.

 

PB will refine the Spine Model to ensure that it incorporates physical changes that result from ongoing East Side projects, findings of the current real time control analyses and BES recommendations to allow stormwater flows (based on the water quality storm) to enter the East and West Side tunnels. In refining the hydraulic model, PB will update and augment existing model representation for:

•  Tunnel and diversion system geometry (profile and diameter)

•  Hydraulic loss factors

•  West Side tunnel and Swan Island Pump Station:

▪  Operating procedures

▪  Pump curves

 

PB will review and incorporate initial projected combined sewer flows for dry weather and for the multiple design storms associated with wet weather conditions. The designated wet weather events are the water quality storm, the ASFO 3-year summer design storm, the 25-year design storm, “summer-6” and the historically representative 1982-87 period.

 

PB will run the Spine Model and evaluate the proposed interceptor/tunnel system's performance. The performance evaluation will include:

•  Meeting overflow frequency requirements for the historically representative 1982-1987 period

•  Review of hydraulic grade line elevations for the ASFO storm

•  Determining the ability to convey the 25-year event to the tunnel through the dropshafts and associated piping without adversely affecting conditions in piping systems tributary to the tunnel system

•  Ensuring tunnel can be adequately relieved for extreme events

•  Meeting minimum velocity requirements for dry weather conditions to address sedimentation and flushing

•  Ensuring the water quality storm can be conveyed to and through the tunnel

•  Performing a preliminary analysis of hydraulic transients as identified in the SPINE model (this will be refined in Task 4.02)

•  Analysis of optimal tunnel size based on initial FMP sizing

 

As input to Task 4.03, feedback will be given to the design team on tunnel, dropshaft, and surface pipeline requirements such as flow capacity, required slope, diameter, and venting.

 

PB will review the impact of different vertical and horizontal configurations of the East Side Tunnel on the functionality of the overall system, including the West Side Tunnel and Swan Island Pump Station operation. PB will use the model to determine if there are East Side design features that would lower system operation costs by increasing total storage and/or decreasing pumping costs while meeting CSO control requirements.

The Spine Model will be used to evaluate proposed alternatives for each of the following issues:

•  Options for tunnel profile and entrance elevation to the Confluent Shaft.

•  Drop shaft performance and locations.

•  Tunnel overflows to designated outfalls and backflow prevention systems.

•  Potential tunnel flushing strategies that include effects on West Side tunnel if high East Side profile is chosen.

•  Location of odor control facility options.

•  Elimination of existing outfalls and modifications/use of tidegates in others.

•  Effect of tunnel size on system operation.

 

Based on the results of the analyses PB will:

•  Incorporate and review recommended real time control (RTC) configurations provided by BES

•  Evaluate alternatives for capturing flows from Insley, including use of smaller tunnel diameter between Taggert and Insley basins

•  Evaluate the effectiveness of sediment transport along the tunnel under potential dry weather flow conditions as well as in pump-down mode. This includes effects on West Side CSO Tunnel if high tunnel profile is chosen for East Side.

•  Evaluate system operation including Westside CSO Tunnel and Swan Island interactions and evaluating tunnel flow velocities to minimize sediment deposition.

•  Recommend final tunnel sizing.

 

PB will model the preferred alignment for the dry weather and wet weather design storm conditions identified in Subtask 4.01. The results will be presented at appropriate technical review meetings.

 

Deliverables:

04.01.A – Draft TM on hydraulic modeling that will serve as a section of the Hydraulics Chapter for the Design Criteria Document and as input to the System Configuration Plan to be developed in Task 4.02. The TM will report findings and recommendations, and incorporate tables, charts, maps, and graphs to illustrate results.

04.01.B Final Preliminary Design TM on hydraulic modeling that will serve as a section of the Hydraulics Chapter for the Preliminary Design Report.

04.01.C – Draft TM on Tunnel Sizing.

04.01.D – Final TM on Tunnel Sizing.

 

04.02  System Operations/Hydraulic Analysis

04.02 01  Preliminary Design – Systems Operations/Hydraulic Analysis

Based on total system operational requirements, this task will evaluate how the East Side CSO Tunnel will be incorporated into the overall system to meet multiple operational requirements. The system operations requirements for the East Side CSO System include:

•  Capturing all CSO discharges from outfalls Nos. 28 through 46 and containing CSO flows for all storms less than the ASFO design levels.

•  Allowing hydraulic relief of the East Side Interceptor System (which may include a direct connection from the SE Relieving Interceptor to the tunnel).

•  Safely discharging excess CSO beyond the ASFO level in a manner that minimizes negative river water quality impacts.

•  Controlling stormwater inflow to the tunnel system to prevent CSO events from occurring more frequently than allowed by the ASFO.

•  Managing flows through the tunnel, pumping station and forcemain, and interceptor system to be consistent with the overall operational requirements for the CSO and CBWTP System.

 

PB will utilize the Spine Model to identify operational issues and confirm that the preferred system will meet performance requirements. PB will perform a preliminary surge and transient analysis using the alignments and configurations selected as most probable as the pre-design reaches the 30% design stage. This analysis will build on the transient analyses that have been performed routinely as part of the general hydraulic modeling performed in Task 04.01. The analysis will include the interrelationship of the West Side Tunnel. PB will perform a base run with surge protection at the Confluent Shaft only; this serves as a basis to determine if other surge control devices are needed. If the base run shows problems, PB will introduce appropriate surge control devices into the analyses and optimize their sizes and locations. PB will coordinate with RTC feasibility and pre-design activities that may be complete or occurring concurrently during the East Side Tunnel 30% design.

 

PB will prepare a draft System Configuration Plan. Documentation from the Flow Management Plan (FMP) will be reviewed to avoid duplication of material and adjustments made to the content of the document. References to the appropriate FMP products will be made in the System Configuration Plan and/or included as appendices. The System Configuration Plan will include the following sections:

•  System Overview

•  System Design Basis and Criteria

•  Description of System Elements

•  Description of System Performance (this section will include how the system will meet defined operational requirements)

 

Deliverables

04.02.A – Draft TM on preliminary transient and surge analysis.

04.02.B – Final TM on preliminary transient and surge analysis.

04.02.C – Draft System Configuration Plan. Information from the plan will be developed to be used as input to the East Side System Operations Plan produced by BES.

 

04.03 Shafts and Appurtenant Structures – PB will develop potential drop structure site selection and layouts for the alternative alignments taking into account existing facilities and possible connection points for the outfalls. PB will:

•  Evaluate shaft sites with regard to tunnel alignment, shaft functions and property ownership.

•  Evaluate Drop Structure designs for dry and wet weather flows.

•  Evaluate Diversion and Drop Structure Layouts for up to six stormwater outfalls.

•  Evaluate consolidation options for CSO and stormwater outfalls.

•  Evaluate physical layout of shafts for overflow requirements.

•  Evaluate ventilation and odor control approach for selected tunnel profile, including potential added effects on the West Side Tunnel if high East Side profile is selected.

•  Evaluate tunnel access and maintenance requirements and establish access shaft locations.

•  Prepare 30% design drawings showing shaft types and locations.

•  Provide cost-optimized design for shaft consolidation

•  Develop conceptual physical layouts for real time controls

 

Deliverables:

04.03.A – Draft TM on single versus multiple use shafts.

04.03.B – Final TM on single versus multiple use shafts.

04.03.C – Draft TM on drop shaft layouts including consolidation options.

04.03.D – Final TM on drop shaft layouts including consolidation options.

04.03.E – Draft TM on odor control facility options.

04.03.F – Final TM on odor control facility options.

04.03.G – Draft TM on layout of instrumentation and real time controls.

04.03.H – Final TM on layout of instrumentation and real time control.

04.03.I – Draft TM on layout of stormwater connections.

04.03.J – Final TM on layout of stormwater connections

04.03.K – Draft TM on access shafts

04.03.L – Final TM on access shafts

 

04.04  Structures/Tunnel Interaction – PB will collect building and bridge foundation information for existing and past buildings, bridge structures, and permanent and temporary footings obtained during the West Side CSO investigation and the East Side 10% Pre-Design Report. Additionally, PB will contact the agencies responsible for the Ross Island, Marquam, Hawthorne, Morrison, Burnside, Steel, Broadway, and Fremont Bridges, the Lower Albina Overcrossing, and the MLK and Interstate viaduct structures and will collect as-built foundation data from these agencies in the vicinity of the alignment alternatives. The data to be collected will include foundation type and location, pile type, size, number of elements, material, diameter, and tip elevation, if available.

 

For buildings along the alignment alternatives, an assessment of the sensitivity of the structure to deformations induced by tunneling will be made. Tall masonry buildings along the Reach 2 alignments that are sensitive to settlement will be identified. Foundation data for the tall buildings will be obtained (if available) and a preliminary assessment of the impact of tunnel construction on them will be made. Maps of the footing locations will be developed for use in the tunnel drawings.

 

Structure/Tunnel interaction assessment of sensitivity to settlement of major utilities will also be performed.

 

Deliverables:

04.04.A – Draft TM summarizing buildings (including description of available information on building foundations) and major utilities sensitive to settlement.

04.04.B - Final TM summarizing buildings (including description of available information on building foundations) and major utilities sensitive to settlement.

04.04.C – Draft TM summarizing foundation information for each bridge.

04.04.D – Final TM summarizing foundation information for each bridge.

04.04.E – Draft TM on Tunnel Impacts to Structures and major utilities.

04.04.F – Final TM on Tunnel Impacts to Structures and major utilities.

 

04.05 Tunnel Alignment Study –PB will :

•  Identify alignment alternatives based on the 10% pre-design report and up to two additional alignments based on the recommendations from the initial design workshops

•  Identify Alignment Conflicts, such as right-of-way issues, existing structures, business, traffic or land zoning concerns, and public or political issues along the alignment alternatives.

•  Provide a video record of the alignment alternatives.

•  Identify locations for all required temporary and permanent surface facilities along the alignments.

•  Identify cost and schedule issues.

•  Develop Tunnel Profile Alternatives based upon geological and geotechnical information collected from existing records and borings completed for this project.

•  Develop surface piping consolidation alternatives.

•  Evaluate alignment alternatives and impacts on adjacent structures and other improvements.

•  Prepare Working Tunnel Alignments and Profiles based upon identified conflicts and data gathered from historical, cultural, geotechnical program, CSO flows, and available land parcels.

•  Provide evaluation matrix for evaluating alternatives.

•  Develop material suitable for presentation of alternatives to BES Decision Process.

 

Deliverables:

04.05.A – Draft Alignment TM describing advantages and disadvantages for alignment alternatives and recommendations.

04.05.B – Final Alignment TM describing advantages and disadvantages for alignment alternatives and recommendations.

 

04.06 Tunneling/Construction Risk Strategies –PB will:

•  Identify potential strategies to mitigate significant risks either through risk avoidance, design, or allocation.

•  Assess probable tunnel and shaft construction techniques based on the geology and groundwater conditions along the alignment.

•  Perform reality checks on project costs for major elements of work and for tunnel size.

•  Identify tunneling risks and mitigation for the selected profile and alignment.

•  Estimate rates of production for scheduling.

•  Provide a preliminary list of areas where contaminated materials are likely to be found.

 

04.06.01 Tunnel Diameter versus Cost and Feasible Tunnel Construction Methods

PB will support the Alternatives Development and Evaluation Tasks in the CSO Sizing and Flow Management Pre-design Project by providing initial up to date construction cost estimates for East Side CSO tunnel diameters ranging from 14-foot to 22-foot in 1-foot increments and for microtunnels ranging from 6-foot to 10-foot. PB will undertake a survey of tunnel projects to develop a database on cost, constructibility and feasibility of tunnel within the specified size range constructed in ground conditions comparable to those in Portland. PB will also use PB’s existing database of tunneling costs to develop the required cost estimates.

 

04.06.02 Risk Evaluation Measures

Early in the preliminary design, a qualitative risk assessment of the anticipated construction activities will be made that covers all types of risks. One of the main purposes is to raise awareness to the major risks of the project. As the design progresses, PB will maintain a risk assessment log to assure that identified risks are evaluated during the design. Emphasis will be given to minimizing overall risk by reducing the likelihood of occurrence of accidents with large consequences. The likelihood of occurrence and consequences of each risk can be assessed for the project.

 

PB will develop a “What if/Checklist” that lists construction and operational scenarios and assesses their risk. The list of risk hazards identified in preliminary design will be maintained and new categories as they are identified to assure that they are taken into account in the design.

 

04.06.03 Alternative Contracting Approaches

PB will participate in a workshop to identify possible contracting approaches for the construction of the project that are compatible with the practices and applicable regulations of BES and Oregon State contracting law. PB will present:

•  Alternative delivery methods such as variations of design-build contracting and methods of pre-qualification.

•  A discussion of the inclusion of specific clauses in the contract documents including those generally recommended by the Underground Technical Research Council.

 

PB will document the recommendations from the workshop in the Preliminary Design Report.

 

04.06.04  MBE/WBE/ESB Contracting Opportunities

PB will identify potential contracting opportunities that may be solicited from and performed by MBE/WBE/ESB certified firms

 

04.06.05  Spoil Disposal Options

PB will evaluate spoil disposal options including costs for the following alternatives: 1) leaving spoil disposal entirely to the contractor 2) providing spoil disposal sites free of charge or at a defined cost 3) providing disposal or disposal sites for contaminated spoils only.

 

Meetings between PB and BES staff will discuss the most appropriate action.

 

04.06.06  Corrosion Protection Measures

PB will review available information provided by BES and data developed for the West Side CSO tunnel and recommend corrosion protection measures. BES will provide CSO water quality data.

 

Deliverables:

04.06.A – Draft TM evaluating tunnel diameter versus cost.

04.06.B – Final TM evaluating tunnel diameter versus cost.

04.06.C – Draft TM on Evaluation of TBM Selection.

04.06.D – Final TM on Evaluation of TBM Selection.

04.06.E – Draft TM describing Risk Evaluation and Mitigation Measures.

04.06.F – Final TM describing Risk Evaluation and Mitigation Measures.

04.06.G - Workshop on Alternative Contracting Approaches.

04.06.H - Draft TM on Evaluation of MBE/WBE/ESB Opportunities.

04.06.I - Final TM on Evaluation of MBE/WBE/ESB Opportunities.

04.06.J – Draft TM on Spoil Disposal Options.

04.06.K – Final TM on Spoil Disposal Options.

04.06.L – Draft TM on Corrosion Protection Measures.

04.06.M – Final TM on Corrosion Protection Measures.

 

04.07 30% Design Development – With the completion of the alignment study, the PB Team will prepare 30% complete drawings. A preliminary drawing list of all engineering disciplines will be prepared, including plan sheets for anticipated standard and special construction details.

 

PB will submit 25 paper copies and an electronic copy using AutoCAD Release 2000 and using the BES CADD Standard for the design drawings (11 inches x 17 inches format) to BES. Drawings will include:

•  Project layout sheet and plans showing tunnel alignment and location of major components including drop structures, construction and access shafts with utilities shown.

•  Tunnel profile.

•  Identification and location of all necessary pipeline appurtenances on plan and profile.

•  Preliminary layout and general arrangement of drop structures and connection pipes with utilities shown.

•  Peak hydraulic grade line

•  Preliminary utility information, conflicts, and relocations

•  Temporary and permanent easements with sufficient detail for legal descriptions and identifying access requirements.

 

PB will prepare and submit a memorandum identifying the specifications for the tunnel construction package. Once BES approves the list of technical specifications, PB will prepare draft specifications for the Tunnel Construction Package. The specifications will provide standard language and details common to tunneling contracts. The technical specifications developed under this task will reflect Division 2 through 16 following the CSI-format.

 

Deliverables:

04.07.A – Set of Preliminary Design Drawings and Specifications for review by BES, TRC and Value Engineering workshop.

04.07.B - Set of Preliminary Design Drawings and Specifications incorporating dispositioned comments.

 

04.08 Preliminary Design Report – PB will summarize all of the options evaluated and the design decisions established during Preliminary Design into a Preliminary Design Report. PB will submit 25 copies of the report to BES.

 

The report will contain all appropriate TMs published for the various studies conducted during the 30% design project. As a minimum, the report will include the history of the area, a summary of geologic and geotechnical conditions, the recommended tunnel alignment and profile, summaries of hydraulic analyses performed, an updated system configuration report, tunnel and shaft design criteria, utilities, permitting, civil, right-of-way, risk assessment, fatal flaw analysis of traffic control, construction cost and schedule, and a list of issues to be resolved during final design and construction.

 

A draft report will be provided for BES, TRC, and Value Engineering reviews. Following reviews, PB will revise the draft report to reflect the dispositioned comments and submit a final Preliminary Design Report to BES.

 

Deliverables:

04.08.A - Draft Preliminary Design Report.

04.08.B - Final Preliminary Design Report.

 

04.09 Cost Estimate

04.09.01 Review of Pre-Design Cost Estimate

PB will review the cost estimate prepared for the pre-design and update it based on the assumptions and criteria determined in the initial design workshops.

 

04.09.02 Update of Cost Estimate Based on Decisions During Design Development

During the preliminary design and as design decisions are made that could modify the cost of specific items in the estimate, the total cost estimate will be updated for those items.

 

04.09.03 Cost Estimate at 30% Design level

PB will prepare a detailed cost estimate and construction schedule using the 30% design drawings. All costs will be broken down into labor and materials with all insurance costs fully loaded into labor. Two cost estimators working independently will prepare the cost estimate. The estimate will address the following:

•  Composition of unit costs.

•  Basis for assumptions, clarifications, and items included and excluded.

•  Criteria.

•  Allowances.

•  Area cost factors and cost data sources.

•  Escalation and Contingencies.

 

The level of detail for the estimate should be sufficient to develop an estimate to a level of accuracy of +15%, -10%.

 

04.09.04 Construction Schedule at 30% Design level

PB will prepare a construction schedule using PRIMAVERA. The schedule will identify all major construction activities identified in the cost estimate.

 

Deliverables:

04.09.A – Review of Pre-Design Cost Estimate.

04.09.B-X – Updates of Cost Estimate Items.

04.09.C - Estimate of Probable Construction Cost.

04.09.D - Construction Schedule.

 

Task 14A – Preliminary Engineering - Design Reviews and Workshops

Objective: To provide initial design workshops, value engineering workshops, risk management workshops, presentations to BES staff, and technical QC reviews of the design during preliminary engineering. The technical review workshops (TRC) will be undertaken using independent, senior staff familiar with BES standards and CSO tunnel design.

 

14.01 Presentations to Council and Senior BES Personnel

PB will prepare materials and provide support for up to 7 presentations before Council or Senior BES Personnel.

 

Deliverables:

14.01.A-X – Presentation Materials.

 

14.02. Initial Design Workshops

PB will begin the preliminary design with a review of the layout criteria and assumptions used to develop the 10% Pre-design Report in six (half day) work shops for:

•  Geotechnical Conditions.

•  Environmental Conditions.

•  System Integration and Operations.

•  Tunnel Alignment and Profile.

•  Shaft Locations and Types.

•  Cost Management.

 

Prior to each workshop, PB will prepare a technical memorandum to be distributed to BES and that will form the basis of the presentation to be made at the workshop.

 

Each workshop will address information available from the pre-design, additional information now available, the assumptions and criteria used for the pre-design, the current applicability of the pre-design assumptions and criteria, and an outline of the proposed approach for developing the design.

 

Deliverables:

14.02.A-X– Presentation Data Package and Presentation Material for Initial Design workshops.

14.02.B-X – Minutes of Initial Design Workshops.

 

14.03 Technical Reviews at 15% and 30% Completion Levels

PB will conduct a two-day technical review of the project at the 15% Completion Level. The purpose of the review will be to explain the project to the TRC, outline the alternative alignments under consideration, review the proposed evaluation criteria, present the lessons learned from the West Side CSO Project and explain how they apply to the East Side CSO Project.

At the 30% Design Completion Level, PB will conduct a 3-day technical review workshop with its Technical Review Committee. The technical review will concentrate on issues related to constructibility, biddability, maintainability, construction safety, mitigation of construction impacts, identification of major issues needing further study and issues that may help to reduce construction costs, risks, impacts, duration and/or minimize construction change orders and claims. The TRC discussions will be summarized and incorporated into the final Preliminary Design Report with a separate compilation of the identified risk and risk mitigation procedures included for final design action. The review workshop will be held two weeks before the 30% design is submitted to BES.

 

Deliverables:

14.03.A-X– Presentation Data Package and Presentation Material for TRC

Reviews at 15 and 30 % Design Completion Levels.

14.03.B-X – Minutes of TRC Meetings.

 

14.04 Value Engineering Workshop

The preliminary design package will be submitted to BES and used for a Value Engineering (VE) Review. PB will participate in the BES-conducted Value Engineering review. Following the meeting, PB will provide final written responses to the VE comments.

 

Deliverables:

14.04.A – Presentation Data Package and Presentation Material for Value

Engineering Workshop.

 

14.05 Risk Management Workshop

PB will conduct a risk management workshop with BES and the Technical Review Committee with specific attention to the bid documents. The risk analyses are carried out for both construction and operational conditions for the following purposes:

•  To assess the relative risks of the different system components and construction schemes.

•  To assess the risk of disruptive events during construction that could result in added cost or delay or destruction of the works.

•  To develop design parameters that will result in mitigating or eliminating certain identified risks.

•  To develop specifications and safety requirements to be embodied into the construction contracts.

•  To provide information on operational risk parameters.

 

Deliverables:

14.05.A – TM documenting the Risk Management Workshop.

14.06 Technical Reviews of Value Engineering Comments

PB will conduct a follow up TRC Meeting to review the comments presented by the Value Engineering Workshop and the responses provided by PB.

 

Deliverables:

14.06.A - Technical Review Committee comments and recommendations; responses to VE findings; and responses to BES Comments.

 

14.07 Decision Committee Workshop Presentations

PB will prepare a data package, presentation material and give presentations at up to 50 decision committee workshops. PB will prepare minutes of each workshop documenting the decisions made and action items.

 

Deliverables:

14.07.A-X – Data Package for Workshops.

14.07.B-X – Minutes of Workshops.

 

14.08 Attend BES Review Meetings

PB will attend up to 10 BES review meetings and respond to BES comments. PB will document the comments presented by BES.

 

Deliverables:

14.08.A-X – Documentation of BES Comments.

 

14.09 Responses to BES 15% and 30% Comments

PB will prepare a log of comments from BES, value engineering and TRC workshops and prepare written responses.

 

Deliverables:

14.09.A-X – Documentation of Comment Responses.

 

Task 17A: Public Involvement / Community Benefit Opportunities(CBOs)

Objective: To support BES in developing and implementing a public involvement program that encourages community interest, understanding, and support of this project.

 

17.01  Community Support Activities

17.01.01 – Develop a Public Involvement Plan

PB will work with BES staff to develop and implement a public involvement (PI) plan. The plan will outline PI activities, task leads, work products, time lines (expected to be linked to the project initiation, the 15% preliminary design, and the 30% preliminary design), and budget.

 

17.01.02 – Develop a Stakeholder Database

PB is to identify new stakeholders. The stakeholder database will include contact names, addresses, phone numbers, fax numbers, email addresses, organization name (if appropriate), group publications and meeting schedules/opportunities, and contact tracking information. PB will work with BES to identify stakeholders and key interest groups early on in the projects. Stakeholders will be identified using MapInfo, physical site visits, neighborhood, business and tenant association directories, and others as identified in the database development process.

 

The database will be used to maintain a system for tracking all public participation issues and comments received to ensure that BES and/or PB address all issues. PB will implement a feedback protocol with database documentation to track that public concerns are considered into the design effort and decisions. A summary report containing the project database, findings, and any implementation considerations for design and construction will be provided at the end of the preliminary design phase.

 

17.01.03 – Conduct Stakeholder Interviews

PB will organize and develop a questionnaire to survey key stakeholders within the project area. PB with BES staff (as appropriate) will conduct these interviews (PB will conduct up to 30 interviews) with critical property and business owners, neighborhood and business associations, and interest groups and individuals identified in the interview process to collect their concerns and develop project support. The interviews are intended to inform, educate, and collect information relative to the project. At the end of the interviews, PB will prepare a stakeholder interview report that will include date and time, location, names of individuals in attendance (if they wish to be known), identified issues, public values, key neighborhood scheduled functions (such as parades and clean-ups).

 

17.01.04 - Coordinate and Attend Interagency Meetings

PB will arrange, attend, and facilitate two (2) meetings with agencies to provide general information, familiarize agencies with the East Side CSO Tunnel Project, and gather information that may impact the project. Working with BES, PB will invite bridge and approach owners, river users and managers, PDOT and other relevant government entities. Staff will attend and provide technical support and answer questions on the project.

 

17.01.05 – Contingency Coordination and Attendance of Interagency Meetings

At the direction of the BES PM or Public Involvement Task Manager, PB will arrange, attend, and facilitate up to five (5) additional meetings with agencies to provide general information, familiarize agencies with the East Side CSO Tunnel Project, and gather information that may impact the project. PB will invite the relevant government entities. PB staff will attend and provide technical support and answer questions on the project.

 

This task will not be performed unless specifically authorized by BES PM or Public Involvement Task Manager.

 

17.01.06 - Prepare Public Update and Public Meeting Mailers

PB will prepare draft text and graphics for three (3) project information mailers within project area (expected to be the project initiation, the 15% preliminary design, and the 30% preliminary design). Draft text and graphics will be submitted to BES for final layout, production, and distribution. The first Project Update will summarize project purpose, process, alignment alternatives, project timeline, project contact, and announce any public meetings. The second Project Update will further outline project design and construction issues and announce any public meetings. The third will provide a design update and outline any design modifications and project construction issues.

 

PB will also prepare draft text and graphics for three (3) public meeting mailers (expected to correspond to the project initiation, the 15% preliminary design, and the 30% preliminary design) announcing all upcoming public meetings. (See Task 17.01.09 – Public Meetings.) The announcement will summarize meeting(s) purpose, location, time, and a contact person.

 

17.01.07 – Prepare Small Group Presentations

PB will help develop and schedule up to thirty (30) small group community presentations. The presentations will be targeted to project area’s neighborhood and business associations. PB will develop an agenda and schedule and provide a location, at least thirty (30) calendar days prior to each meeting.

 

PB will prepare presentation materials, develop and update speaker materials, provide technical support, and provide updates to project progress. Presentation materials for meetings will typically consist of PowerPoint presentations and display boards containing such items as subsurface geology, aerial views of alignments, shaft locations, etc. All presentation materials will be reviewed and approved by BES.

 

17.01.08 – Contingency for Small Group Presentations

At the direction of the BES PM or Public Involvement Task Manager, PB will develop, schedule, attend, and conduct up to ten (10) small group community presentations. This task is intended to allow BES to use PB resources to conduct some small group presentations as needed due to limited BES resources and/or schedule. The targets, presentations, and task work will be as described in Task 17.01.07 with the additional work of PB attending and conducting the presentations, providing meeting equipment, providing meeting room preparation and tear down, recording meeting notes, and reporting back to BES on meeting results. PB will collect community input on the construction and traffic issues and answer questions on the project. PB will summarize the comments from each meeting.

 

This task will not be performed unless specifically authorized by BES PM or Public Involvement Task Manager.

 

17.01.09 - Public Meetings

PB will assist with compiling a mailing list and locating, planning, publicizing, and conducting up to nine public information meetings (expected to correspond to three meetings per project milestone: project initiation; 15% preliminary design; 30% preliminary design) in central locations. Per grouping, two meetings will be held in the evening and one during business hours to encourage the maximum participation from both residents and businesses. These meetings will announce or review the 1) project purpose, process and timeline, 2) information found during geotechnical site investigations, potential alignment, and structure locations, 3) project design and construction issues and the preferred alignment, 4) project decisions. The meetings will provide opportunities to make project information available as well as to receive additional information from the public. PB will provide task representatives to attend and address technical questions and concerns, note public comments and meeting events, and summarize the meetings into a report. Meeting refreshments will be arranged by PB.

 

Deliverables:

17.01.A – Task Work Plan (JLA)

17.01.B - Monthly Updated Stakeholder Database Print-outs (JLA)

17.01.C - Conclusions of Database Collection and Tracking (JLA)

17.01.D - Stakeholder Interview Questionnaire (JLA)

17.01.E – Stakeholder Interview Report (JLA)

17.01.F – Draft Text and Graphics for Project Information and Public Meeting Mailers (JLA)

17.01.G – Minutes from Interagency Meetings (JLA)

17.01.H– Memorandum outlining proposed presentation schedule (JLA)

17.01.I – Small Group Presentation Materials (JLA)

17.01 J - Meeting Notes for Small Group Meeting as directed (JLA)

17.01.K – Public Meetings Summary Report

 

17.02  CBO’s

Task 17.02.01 – Preliminary CBO Initiation

The Community Benefit Opportunities (CBO’s) Program will be integrated into the project to collect, evaluate, and plan the implementation of project area improvements desired by the area residents and businesses. During preliminary design, PB will identify criteria for targeting, recruiting, reviewing, and screening of initial, conceptual CBO’s that will be nominated by the public in later design efforts.

 

•  PB will assist BES in determining and securing the membership of the CBO Selection Committee.

•  The PB Team will attend and participate in CBO Criteria Development Workshop to assist BES in the development of criteria for the targeting, recruiting, reviewing, and initial screening of CBO nominations.

 

Deliverables:

17.02.A - List of Recommended CBO Selection Committee members and supporting details (JLA)

17.02.B - Participation and meeting minutes from CBO Criteria Development Workshop (JLA)

17.02.C - TM documenting initial criteria determined in workshop, scoring procedures, and plan to implement initial screening criteria into later nomination work including targeting CBO’s, nomination submittal form, and initial CBO screening. (JLA)

 

Task 18A: Project Management

Objective: To build a team with the client and subconsultants, to establish achievable goals for the project and for each Task Leader, and to provide them with the tools needed to accomplish – on schedule and within budget – the tasks outlined in the scope of work.

 

18.01  Prepare Project Management Plan

PB will prepare a Project Management (PM) Plan for the project and update monthly as changes occur. The PM Plan outlines the procedures and controls that will be employed to complete the project. The Project Management Plan is to outline:

 

a)  Scope of work

b)  Total project schedule, forecast, and updated monthly

c)  Total project budget, forecast, and updated monthly

d)  Project coordination procedures

e)  Invoicing and billing procedures

f)  File documentation procedures

g)  Quality Assurance and Control procedures

h)  Communication reporting

i)  Change management procedures

j)  Project monitoring procedures

k)  Decision making protocol

l)  Total project cost control procedures

 

Copies of the Project Management Plan will be distributed to BES and members of PB design team.

 

Deliverables:

18.01.A - Project Management Plan.

18.01.B – Work Breakdown Structure

 

18.02  Prepare Work Plans

PB will prepare project work plans for each of the design tasks of the project. All tasks are to have a work plan associated with them. The work plan is to include a breakdown of the cost and schedule by task. The breakdown is to include a listing of personnel by name as well as a general listing by job classification of the individual responsible for completing the work.

 

Deliverables:

18.02.A-X – Work Plans.

 

18.03 Project Coordination

The Project Manager will coordinate all project work. The PM will coordinate work with BES, maintain project records and files, review work for completeness, look at ways to start work elements early, develop recovery plans if work elements fall behind schedule, coordinate work between PB’s subconsultants, and oversee the mentoring of HUB firms. PB will review management information; progress reports and project needs, and provide management actions needed to maintain budgets and schedules, as well as maintaining quality control of the deliverables. Under this task, PB is to prepare the scope of services to meet BES requirements, prepare and complete subconsultant agreements, coordinate, review, and administer all work by sub-consultants. PB will maintain a written record of all communications and establish and maintain a computerized Document Control file system for filing and tracking all deliverables, communications, and documents generated as part of the project.

 

18.03.01 – Team Meetings

PB is to hold weekly coordination meeting with the BES Project Manager, Ms. Cleys, and the team members to discuss and coordinate project activities, work progress, budget and schedule compliance, project issues, past tasks, and planning for future tasks and work issues. PB will keep and provide a weekly “Outstanding issues” list. PB will establish meeting agenda and prepare minutes of the meeting; summarizing issues discussed; actions items established and responsible parties for resolution of outstanding issues; and any deviation from anticipated budgets or schedule dates.

 

18.03.02 – Coordination with other CSO Project

As requested by the BES Project Manager, PB’s Project Manager will attend and participate in BES coordination meeting with other CSO projects.

 

18.03.03- QA/QC Reviews

Quality control of project deliverables is to be the responsibility of each task leader and overseen by the Project Manager. An internal QA audit will be held at the completion of the 30% Design Package. All QA/QC will be in accordance with PB’s procedures and the BES Quality Manual.

 

Deliverables:

18.03.A – Final Scope of Services.

18.03.B-X – Copies of Subconsultant Agreements.

18.03.C-X - Weekly “outstanding issues“ list.

18.03.D-X – Minutes of Meetings with other CSO Projects.

 

18.04 Progress Reporting and Invoicing

 

18.04.01 Prepare Monthly Progress Reports

PB will prepare a monthly progress report to be submitted by the 5th of each month. The report is to include an updated schedule reflecting hours spend-to-date, costs by task, earned value, estimates-to-complete, and breakdown of HUB participation. The monthly progress report will include: (1) an Executive Summary summarizing all work performed during the reporting period including work progress compared to scheduled progress as presented in the project schedule, budget plan and schedule performance, explanation of existing or anticipated budget or schedule and recommended corrective actions, and critical project issues needing resolution; (2) a Summary of Work by Sub-task describing work performed during the reporting period and the firm(s) that incurred associated costs; (3) an updated status of deliverables listing all deliverables of the contract with original target submittal dates and the actual or projected submittal dates of draft and final deliverables.

 

PB will update the project schedule using Primavera software. The project schedule with charts is to be included with the monthly progress reports.

 

18.04.02 Prepare Monthly Invoices

PB will prepare monthly invoices to be submitted by the 5th of each month. The report will include hours spend-to-date by persons by task, direct expenses, and mark-up.

Deliverables:

18.04.A-X – Monthly Progress Reports.

18.04.B-X – Monthly Invoices.

 

18.05 QA Internal Audits

PB will provide QA audit of the project at the 30% design completion level.

 

Deliverables:

18.05.A-X – TM Summarizing audit findings.

 

18.06  Project Controls

PB will develop on a monthly basis an updated design schedule reflecting hours spend-to-date, costs by task, earned value, estimates-to-complete

 

Deliverables:

18.06.A-X – Updated charts for the monthly progress reports.