Sub-Product JA – Engineering Studies/Appendix
The required work items in JA – Engineering Studies/Appendix are based on ER 1110-21150, Engineering and Design For Civil Works Projects, Paragraph 13 (Engineering
During Feasibility Phase) and Appendix C (Content of Engineering Appendix to
Feasibility Report)
An Engineering Appendix will be prepared that supports the alternative analysis and the
recommendations shown in the Feasibility Report. For site-specific recommendations, the
Engineering Appendix will be prepared at a level of detail necessary to develop a
defensible baseline cost estimate that addresses all pertinent cost factors with adequate
contingency factors.
The Engineering Appendix will document the results of all of the engineering
investigations conducted during the feasibility phase, including: surveying and mapping,
hydrology and hydraulics studies, geo-technical investigations, site investigations, design
analysis, and cost estimating. The Engineering Appendix will be prepared by the Rock
Island District’s Engineering Division (or its contractor) and will be scheduled for
completion in time to be incorporated into the draft Feasibility Report. The cost of
preparation of the Engineering Appendix is included under the various tasks under SubProduct JA. The schedule and cost of required engineering technical investigations are
detailed below.
Four priority project areas have been identified by the planning team and include: 1)
Amazon Creek, 2) Cedar Creek, 3) the Willamette Greenway (lower end of the Coast
Fork & Middle Fork Willamette), and 4) ESA related to the main stem Willamette. In
addition, it has been assumed that a different level of work (i.e. create conceptual
solutions) will be required at other locations within the study area.
Tasks and activities are based on a 4-year time frame for the study.
Major Task JAA: Surveying and Mapping
Surveying of specific project sites will be required to design waterway projects/ plans.
All surveying activities will be performed in accordance with EM 1110-2-1000, EM
1110-1-1003, and EM 1110-1-1005. The USGS, USFWS, NRCS, State, and local
government planning agencies and universities will be contacted to locate and obtain any
available existing surveying and mapping data. Existing and historical aerial photography
also will be obtained from available sources.
The cost of this item is shown under the GIS tasks under Plan Formulation tasks JJBA
through JJBD.
Major Task JAB: Hydrology and Hydraulic Studies/Report
The following is general description of overall JAB Hydrology and Hydraulics tasks and
activities.
CENWP-EC-HY
1 of 10
Eugene/Springfield
A breakdown of these hydrology and hydraulics investigations and how these are to be
applied at the four priority project area is included in JABEA through JABEC.
This task will be conducted in phases. The first phase involves reviewing available
hydrologic, hydraulic, and geomorphic data to identify potential restoration measures.
The second phase will included the detailed analyses necessary for design and evaluation
of the proposed restoration measures. Separate reports will be prepared for each priority
stream reach, detailing the results of hydrologic and hydraulic studies conducted during
the feasibility study to characterize the study areas and design and evaluate alternative
plans.
Task JABA: Assessment of Stream and Watershed Conditions.
Existing and historic hydrology, hydraulics, and geomorphology of the watersheds will
be reviewed to identify changed conditions.
Sub-Task JABAA: Hydrologic Assessment
Engineer staff will conduct a review of available information on existing and historic
watershed conditions, basin hydrology, and reservoir regulation to identify the current
hydrologic regime and the degree of changes that have occurred in the basin. This task
will require _______ days and cost __________.
Sub-Task JABAB: Hydraulic, Sedimentation, and Geomorphic
Assessments
A review will be made of available reports, maps, and aerial photographs, and the
engineer staff will conduct field visits to define current hydraulic and geomorphic
conditions in the streams and the stream responses to channel modifications. This task
will require __________ days and cost _________.
Task JABB: Alternative Measures
The above hydrologic, hydraulic, and geomorphic analyses will be used to identify
potential measures suitable for specific locations within the four priority stream reaches.
Scopes of work will be prepared for the detailed analyses required to evaluate the
proposed restoration measures.
Sub-Task JABBA: Identify Measures
Potential restoration and other measures, such as wetlands, streambank habitat, spawning
and rearing habitat, gravel management, and alternative flow regulation, will be
specifically identified along each appropriate stream/segment. This task will require
_______ days and cost _________.
Sub-Task JABBB: Scope Alternative Analyses
CENWP-EC-HY
2 of 10
Eugene/Springfield
Engineering staff will prepare detailed scopes of work to evaluate the impact of the
identified measures at the selected waterways/segments. This task will require
_________ days and cost _________.
Task JABC: Project/Plan Alternative Analyses
The detailed hydrologic, hydraulic, and geomorphic analyses necessary for design and
evaluation of the proposed restoration measures are covered in this task. River surveys
and GIS participation are not included in the costs of these tasks.
Sub-Task JABCA: Basin Hydrology Analysis
Watershed hydrology and reservoir flow regulation will be examined to determine if
modifications can be made that will support ecosystem restoration or other multipleobjective project/plan alternatives. The potential of shifting flows closer to historic
natural conditions will be evaluated. Any potential modifications to reservoir flow
release patterns will require careful coordination with the many interested parties within
the Willamette basin.
This task will require _______ days and cost __________.
Sub-Task JABCB: River Hydraulics Analysis
A 2-dimensional hydrodynamic model will be developed and calibrated for each of the
three main river channels, Coast Fork, McKenzie, and Willamette rivers. The models
will then be used to evaluate the potential for improving/reestablishing flow into side
channels, bank protection, and floodplain restoration. One- or 2-dimensional models will
be applied to smaller streams, such as Cedar and Amazon creeks, depending on the
complexity of the proposed restoration measures.
This task will require _________ days and cost _________.
Sub-Task JABCC: River Sedimentation and Geomorphic Analyses
Conduct geomorphic analyses of all streams where proposed restoration measures
involve alteration of the riverbed, banks, or side channels. Specific issues to be
addressed include gravel movement, channel and bank stability, and suspended sediment
transport. This task will require ___________ days and cost ____________.
Sub-Task JABCD: Site Evaluation
The hydrology, hydraulics, and geomorphology of each proposed project site will
evaluated to determine the design features necessary for the site to function as intended.
The applicability of specific actions such as the use of large woody debris, bioengineered bank protection, and gravel management, will be evaluated on a site-by-site
basis. This task will require ___________ days and cost ___________.
CENWP-EC-HY
3 of 10
Eugene/Springfield
Task JABD: Impact Analyses
This task will evaluate the long-term hydrologic, hydraulic, and geomorphic impacts at
each proposed site, based on the project/plan alternatives proposed there. This task will
require _________ days and cost ____________.
Task JABE: Specific Waterway Investigations
This task covers actions necessary to support project/plan development for the four
priority project areas.
It is presented in two phases; a first phase to identify potential actions, and a second
design phase. The first phase will examine existing hydrologic, hydraulic, and fluvial
geomorphic conditions and identify potential floodplain and river channel habitat
restoration measures. The second phase will include detailed hydraulic studies to
develop sitespecific information for design and implementation of measures, and to
identify potential hydraulic impacts.
A design phase cost estimate cannot be finalized until after completion of the
identification and formulation phase.
In addition, this task will develop hydrologic and hydraulic models of Amazon Creek to
evaluate present and historic conditions. It will prepare geomorphic analysis of historic
and current Amazon Creek channel conditions, and develop and evaluate restoration and
flood reduction alternatives.
Assumptions
 Amazon Creek stormwater model will be available from City of Eugene.
 Amazon Creek hydraulic model will be available from FEMA.
 Intense public and resource agency involvement is expected during all phases of
this study.
 Meetings and coordination with Sponsors and public involvement will be
included in project management scope and costs.
Scopes for all four priority project areas are interrelated; breaking them into separate
projects could alter individual scopes.
Sub-Task JABEA: Identification of Alternative Plans/Projects
1. Review existing basin hydrology, reservoir regulation, flood profiles and flooded
areas:
CENWP-EC-HY
4 of 10
Eugene/Springfield
a. Review Willamette reservoir flow regulation, with
emphasis on flow duration curves, annual floods and bank full discharges.
b. Investigate tributary (i.e. Camas Swale, etc) hydrology
c. Review flood profiles and flooded areas to identify potential
areas for floodplain and wetland restoration.
d. Identify hydrologic changes related to land use and climate changes
2. Evaluate historic and current hydraulic and fluvial geomorphic processes:
a. Review past studies, air photos, maps, etc.
b. Conduct field trip to observe fluvial geomorphic conditions.
c. Evaluate pre-development river morphology and sedimentation.
d. Evaluate response to bank stabilizations measures
e. Evaluate response to channel isolation
f. Evaluate response to flow regulation.
g. Channel and terrace sedimentation processes and trends.
3. Identify potential river channel restoration measures:
a. Field trip
b. Identify potential side channel restoration sites
c. Identify potential bankline restoration sites
4. Prepare detailed scope for hydraulic and sediment studies:
a. Determine required hydrologic outputs.
a. Determine required hydraulic model outputs:
(dynamic, unsteady, 2-D, GIS compatible, sediment?)
(there are HEC-2 FEMA models of the Middle and Coast Forks)
b. Review available 2-D hydraulic models and select one
c. Finalize survey requirements
d. Determine sediment transport and geomorphic design requirements
e. Identify downstream flood elevations required by others
f. Identify data requirements for a detailed Demo Site Analysis Study
Sub-Task JABEB: Hydraulic Modeling and Project Analyses
1. Conduct 2-dimensional hydraulic model studies of existing conditions
a. Survey and mapping coordination
b. Channel survey (included in Survey & Mapping)
c. Field trips
d. Model acquisition and training
e. Construct models of Willamette River and other tributaries.
f. Calibrate models to existing conditions
g. Run model for a range of flow hydrographs
 flood profiles
 floodplain
 overbank storage
 flow velocities
h. Collect hydraulic data to calibrate models
CENWP-EC-HY
5 of 10
Eugene/Springfield
2. Evaluate sand and gravel transport and geomorphic regimes:
a. Collect riverbed and suspended sediment samples
 lab work on sediment samples
b. Calculate sediment transport rating curves.
c. Estimate storm transport.
d. Estimate average annual transport
e. Channel and terrace sedimentation patterns
f. Conduct bed material stability analysis
g. Develop conceptual fluvial geomorphic model
3. Evaluate potential channel and floodplain project sites:
a. Depth/discharge relationships, bank full discharge, flow velocities
b. Floodplain and flood water storage
c. Potential bank and floodplain habitat modifications/reconnections
d. Spawning gravel enhancement and channel modifications
e. Use of large woody debris for bank stabilization
4. Investigate/develop alternative flow control plans for Willamette basin reservoirs:
a. Determine timing of restoration/project flow releases
b. Determine water available for alternative projects
c. Develop reservoir release plan for alternative projects
5. Conduct hydraulic evaluation of floodplain project measures
a. Run Willamette model for alternative project/plan flows.
 flood profiles
 floodplain
 overbank storage
 flow velocities
b. Run model for side channel/tributary project/plan measures.
 flood profiles
 floodplain
 overbank storage
 flow velocities
c. Estimate storm and average annual sediment transport
6. Evaluate potential long-term fluvial geomorphic impacts
a. Fluvial geomorphic responses
b. Future bank stability
c. Future bed material stability
7. Evaluate long-term hydraulic impacts accounting for fluvial geomorphic changes
a. Run model for a range of flow hydrographs:
 flood profiles
 floodplain
 overbank storage
 flow velocities
b. Estimate storm and average annual sediment transport
CENWP-EC-HY
6 of 10
Eugene/Springfield
8. Flood damage analysis and floodplain management:
a. Local flood elevations for economic analysis
b. Estimate downstream flood peak discharge changes
c. Estimate downstream flood elevation changes for Economic analysis
d. Compute FEMA 100-yr flood elevations and flooded areas w/HEC-RAS
e. FEMA flood insurance rate map adjustment
Sub-Task JABEC: Special Investigations at Amazon Creek
1. Research current and historic Amazon Creek watershed conditions:
a. Field trip to Amazon Creek
b. Coordination with City of Eugene
c. Research/review historic maps & photos of Amazon Creek.
2. Identify modifications to the hydrologic regime:
a. Review Eugene’s stormwater model of existing conditions.
b. Adapt City of Eugene stormwater model to historic conditions.
c. Compare current hydrology to historic
d. Document historic changes in Amazon Creek hydrology.
e. Identify hydrologic impacts of land use changes.
f. Coordination with City of Eugene
3. Identify changes to channel hydraulics and geomorphology
a. Obtain and review FEMA hydraulic model of existing channel.
b. Adapt the FEMA hydraulic model to historic channel conditions.
(estimate historic channel geometry & roughness)
c. Install and maintain two stream gages
d. Compare results of historic & current conditions hydraulic models
e. Document historic changes in channel hydraulics and floodplain.
f. Field trip to Amazon Creek
g. Conduct geomorphic analysis of existing channel processes.
h. Examine photos of historic channel to identify geomorphic processes.
i. Compare existing & historic conditions for changes and trends.
j. Coordination with City of Eugene
4. Develop and evaluate ecosystem restoration and flood reduction alternatives at
potential action areas:
a. Stakeholder coordination/meetings
b. Identify restoration alternatives
Review - Lower Amazon 1135,
Oak Patch, & Bailey Hill Rd-Terry St
c. Identify flood reduction alternatives
d. Hydraulic evaluation of restoration and flood reduction alternatives.
5. Water quality and suspended sediment:
a. Develop sampling plan
CENWP-EC-HY
7 of 10
Eugene/Springfield
 Water quality parameters
 Public health
 Fish and wildlife
 Sampling schedule
b. Coordination with City of Eugene
c. Collect and analyze samples
d. Evaluate sample results to identify contaminant levels, and
possible sources and corrective actions.
Note: costs for all breakdowns in Task JABE are included in JABA through JABD.
Total costs for all activities in JAB Hydrology and Hydraulic Studies is ________.
Major Task JAC: Geo-technical Studies Report
Activities under this major task will research and prepare support information on existing
regional geologic, soils and land use information. These studies will develop, describe,
and present geotechnical information to support project concept design and detailed
design alternatives and cost estimates. Work would be conducted throughout the study
area.
An analysis of the study area will be performed at a general level of detail, based on
geologic and soil information obtained through secondary data sources, limited field
explorations, and selected laboratory testing. Detailed analysis will be performed for
selected sites as necessary to support the development of project/plan alternatives.
Geophysical investigations will be performed in accordance with EM 1110-1-1802 and
ER 1110-2-1150. Engineering studies will include: sediment composition, assistance in
site selection, stability analysis, settlement, bearing capacity, wave analyses, and
foundation design, material utilization, and development of construction sequences.
Analysis of the selected alternatives will be accomplished to a level of detail necessary to
meet the requirements of the baseline cost estimate.
Activities under this major task are estimated to require ________ days and cost
____________.
Major Task JAD: Initial Site Screening & Analysis
A site development and analysis report is generally required only on major projects
where the site cannot be selected based on an initial field inspection or evaluation of
existing data, but will require additional field investigations (and possibly more detailed
hydraulic analysis). The need for site development and analysis may be required.
Activities under this major task will include internal coordination and meetings, research
and review of existing information, site visits, participation on study team to screen
project/plan alternatives and conduct analysis necessary to evaluate those alternatives
(conceptual designs and quantities). This scope assumes screening and analysis of
CENWP-EC-HY
8 of 10
Eugene/Springfield
projects in the priority waterways/areas, and assumes 2 to 4 alternatives will be
developed for each project.
This major task will describe and present sufficient engineering (Civil) information to
support initial site screening and analysis, and includes incorporation of any review
comments.
Activities under this major task are estimated to require ______ days and cost
__________.
Major Task JAE: Engineering & Design Analysis/Report
All design and drawings will be completed to a level of detail that will ensure the
integrity of the
plan/project structure(s) and/or system and meet the requirements of the baseline cost
estimate. Engineering and design activities will be performed in accordance with ER
1110-1-12 and ER 1110-2-1150. This activity includes internal coordination and
meetings, Site visits and other study team activities.
Assumptions for Civil & Environmental Design Work



This scope does not include costs for necessary data manipulation in a GIS
framework, staff time for mapping and related products, or the purchase of
data/information from counties, state or other organizations.
Sponsor will provide all required information (location & existing design)
pertaining to utility locations.
This estimate assumes that meetings and coordination with sponsors, public
involvement, and independent technical review will be included in costs in the
project management, plan formulation and/or public involvement scope(s).
Task JAEA: Preliminary Designs
This work will develop, describe, and present sufficient engineering (Civil) information,
including preliminary drawings, to support design and cost estimates. Preliminary
concept level designs will be prepared at a level of detail sufficient to develop venture
level cost estimates and aid in the screening of alternatives. Detailed MCACES level
designs if included in the feasibility study will significantly increase the project costs.
This scope of work assumes 4 projects/elements will be developed for each priority
waterway area and that 2 to 4 alternatives (design and quantities) are developed for each
project. It is assumed each project will utilize one or a combination of the same
alternatives.
This task includes identifying and conducting preliminary design of any utilities and
facilities proposed for relocation.
This task will require ______ days and cost _______.
CENWP-EC-HY
9 of 10
Eugene/Springfield
Task JAEB: Detailed Designs
This task will develop detailed designs and quantities for the selected alternatives for
each watershed area or priority waterway; and include a sufficient feasibility-level of
detail to prepare the baseline cost estimate. The cost of this task could vary greatly
depending on the complexity of the each project.
This task will require ______ days and cost _______.
Task JAEC: Engineering Support to Plan Formulation
Engineering evaluations are critical to the plan formulation efforts and successful public
involvement efforts. As part of this task, engineering staff will participate in plan
formulation efforts, meetings with the sponsors, and public involvement activities to
assist in identifying and selecting alternative projects. This will include formulation and
public involvement efforts associated with ecosystem restoration, recreational
development or other multi-purpose project/plan features. The engineering staff will
determine project/plan operation and maintenance costs.
This task will require ______ days and cost _______.
Task JAED: Engineering & Design Analysis Report
Engineering staff will prepare reports and other materials for inclusion in the Engineering
Appendix of the Feasibility Report, including incorporation of any review comments
This task will require ______ days and cost _______.
All activities in Major Task JAE are estimated to require _______ days and cost
__________.
The total cost for all activities to complete Sub-Product JA – Engineering
Studies/Appendix is ____________.
CENWP-EC-HY
10 of 10
Eugene/Springfield