Scope of Work
The scope of work proposed is presented in the task list below. Each task has deliverables, which will be included in the design report. With successful implementation of the scope of work, a suitable design will be created and communicated to all stakeholders.
Task 1 – Project Management
Task 2 – Preliminary Site Characterization
Task 3 – Hydrology
Task 4 - Design Alternatives
Task 5 – Plans, Specifications, and Estimate (PS&E)
Task 6 – Final Design Report and Presentation
Task 1 – Project Management
Project Development Team (PDT) meetings will be held in order to maintain the necessary communication between stakeholders, as the project progresses. PDT meetings will serve to monitor the status of the project, to insure the quality of the project, and to resolve any issues that arise. The PDT will consist of the four project engineers, technical advisor, client, and other stakeholders as necessary. PDT meetings will provide meeting notices, establish the project agenda, and provide meeting minutes for the duration of the project.
1.1 SCRP Team Meetings
Team meetings will be held twice a week to discuss project status. Meeting locations will include the Civil & Environmental Engineering (CENE) capstone room, and for a short time in the geotechnical lab. Communication within SCRP will be recorded by email communication. Weekly hour tracking will be conducted for cost estimation.
Deliverables: Meeting agenda/minutes; Status reports; Timeline; Hour Tracking
1.2 Technical Advisor Communication
Technical advisor meetings will be conducted bimonthly, in addition to in-class discussions.
Deliverables: Meeting agenda/minutes; Status reports
1.3 Client Communication
Meeting with MNA and ACE will be conducted monthly. Communication will be conducted by email and in person at the MNA and ACE office.
Deliverables: Meeting agenda/minutes; Status reports
1.4 Permitting
In order to make construction of the SCRP possible, necessary permits must be issued to responsible parties. These parties include USACE 404 permit, SHPO permit to the state and an ADEQ permit for mitigation measures regarding construction.
Deliverables: 404 permit application; Archaeological study approval; ADOT Project
Approval; ADEQ permit; SHPO permit
Task 2 – Preliminary Site Characterization
Prior to project design implementation, a preliminary assessment of the work-site will be conducted to gather a range of quantitative and qualitative data for existing site conditions. The following subtasks have been established for the completion of this initial assessment.
2.1 Topographic Survey
Based on a careful review of the project needs and the project area, the SCRP team proposes to accomplish the mapping task for this project using field survey methods exclusively. More specifically, a topographic field survey will be conducted to collect pertinent site feature data. Surveying control must first be established by locating predetermined horizontal and vertical coordinates (monuments), established by local utility providers such as the Arizona Department of Transportation (ADOT). The primary piece of equipment to be used in the topographic survey will be a Total Station (TS), capable of collecting GPS points and geo-referencing them to the established datum.
Deliverables: Survey Point List; Preliminary Site Layout Topography; HEC-EMF Model
2.2 Geotechnical Study
A baseline geotechnical study will be performed to determine and analyze pre-existing soil conditions in the channel. Main components of the geotechnical study will include soil sampling followed by basic laboratory testing. Primary testing will yield information pertaining to sediment entrainment, and hydraulic channel roughness. AASHTO and USCS classifications will be determined for cut fill purposes.
Deliverables: Field notes; Preliminary soil analysis, Soil classifications and compatibility
Task 3 – Hydrology
In order to obtain a more accurate representation of flood event discharges, a study of local hydrologic characteristics will be conducted.
3.1 Hydraulic Analysis
Watershed delineation will be performed by evaluating the appropriate United States Geological Survey (USGS) topographic map via AutoCAD. Total drainage area will be approximated to determine the corresponding flood discharges. A hydraulic analysis will also be performed using collected survey data to produce a hydraulic model of the channel. Flood discharges may then be estimated by an alternative method and compared to the drainage study results.
Deliverables: Watershed delineation report; Preliminary hydraulic model report (HEC-RAS)
3.2 Channel Classification
A channel classification, based on the Rosgen classification scheme, will be established using preliminary site survey data, and hydraulic modeling results. Details of the river reach characteristics before remediation will then be readily available.
Deliverables: Rosgen classification
Task 4 – Design Alternatives
In order to determine the most appropriate design for the SCRP, the following design alternatives will be considered.
4.1 Take No Action
Leave the channel reach as it is presently. Allow channel incision to continue, as well as the inevitable possibility of further erosion and parking lot collapse.
Deliverables: HEC-RAS Model, Lifespan Estimate
4.2 Concrete Lined Channel
Add a layer of concrete to line the channel reach in order to stop the local erosion. Any natural restorative look will be abandoned, and high costs will likely be incurred.
Deliverables: HEC-RAS Model for Proposed Concrete Lined Channel, determining flow capacity and channel characteristics; Cost Estimate
4.3 Rock Armoring/Rock Vane/ Gabion Baskets
Install a weir-like rock bar structure across the channel to prevent head cutting erosion up the channel. Cut down entrenched channel walls and conduct restorative bank stabilization upstream.
Deliverables: HEC-RAS Model for Proposed Rock Vane Structure, determining flow capacity and channel characteristics; Cost Estimate
4.4 Natural Channel Restoration
Conduct a natural stream channel restoration, including a restored floodplain and riparian area. Cut down entrenched channel walls and conduct natural bank stabilization using native plant restoration techniques.
Deliverables: HEC-RAS Model for Proposed Naturally-Restored Channel, determining flow capacity and channel characteristics; Cost Estimate
4.5 Design Matrix
A design matrix will be created in order to evaluate the different designs against the criterion for success, in order to determine the best course of action for the rehabilitation efforts.
Deliverables: Design Matrix
Task 5 – Plans, Specifications, and Estimates (PS&E)
Project PS&E will be created in order to establish greater details of the project requirements.
5.1 Civil Design
Topographic representations will be developed through AutoCAD using collected survey data and aerial photography. Earthwork estimates including approximate cut/fill measurements will be conducted.
Deliverables: Site design plans; Cut/fill volume estimates; Excess cut removal, transportation, and disposal technical memo
5.2 Mitigation Measures
Project team will assist in the development of proposed mitigation measures including the incorporation of an effective geosynthetic bank liner, protection of the potential archaeological site and the prevention of invasive and/or non-native species introduction.
Deliverables: List of relative mitigation strategies
5.3 Cost Estimates
Necessary costs from project beginning to end will be estimated and tabulated to cover expenses including, but not limited to, asset procurement(grants), heavy machinery operating costs, restoration materials(bank liner) and labor.
Deliverables: Cost estimates
5.4 Prepare the Area of Potential Affect Map
Drawing will be provided to depict the area that will be affected by the rehabilitation measures. These drawings will provide information on construction measures that will be taken such as construction material storage locations. Drawings will show areas where excavation, transplanting of trees, and site perimeter are located. The map of potential area affected will assist in leaving no trace after design has been implemented. Proper implementation of design requires foresight into the natural setting of the ecology of the area as well as a historic study of humans inhabiting the area. Assurance of the limited area impacted will be provided as a part of the deliverable as well as proper mitigation measures for construction. Subtasks for the environmental documentation are stated below.
Deliverables: Area of Potential Effects Map; Ecosystem and native species review memo
Task 6 – Final Design Report and Presentation
6.1 Final Report
A final design report will be made to show all the technical data related to the design foresight and implementation of the rehabilitation design.
Deliverables: Design report; Compilation of all deliverables