Project Tasks 

Task 1: Acquire Existing Site Information
This task includes gathering and researching information on the site’s existing conditions. The objective is for the team to gain an understanding of the topography, flow, soil condiThe team will determine the future impacts the roadway will have, such as on roadway capacity and future development, in reference to its 20 year lifetime. It is important that the team develop an analysis to predict and mitigate potential consequences that the project may have. This will include social, environment, and economic factors to access holistic sustainability.tions, and traffic data in the area.

Task 1.1: Lidar Data Access
Coconino County public data, download Bellemont 2’ contours, and interface with Civil3D to create a surface. This is necessary to provide existing elevation data to begin analysis on.

Task 1.2: FEMA Flood Zone
Using aerial photos from FEMA resources, integrate FEMA flood zone limits into Civil3D. This will allow the design team to have clear and specific points of reference.

Task 1.3: Geotechnical Reports of Similar/Relevant Projects
Request geotechnical reports from Coconino County Public Works for projects in the project area and compile them for analysis. This will allow the design team to have a general understanding of the soil conditions in the project area.

Task 1.4: Geotechnical Analysis
Review geotechnical reports from past Coconino County project to assess soil characteristics. Data will be compiled into a digestible Excel spreadsheet for review and analysis in later structural section design tasks.

Task 1.5: TCDS data
Access ADOT data online on surrounding highways and roads and compile for analysis. General traffic data, such as average daily traffic, will be compiled in an Excel spreadsheet. This data will be used for analysis in later traffic analysis tasks.

Task 2: Site Investigation
This task includes visiting Bellemont to gather information on the proposed location of the alignment and the tie-in areas.

Task 2.1: Site Investigation Planning
Conduct team meetings to decide the site investigation objectives and tasks. Refer to the Field Safety Checklist Form and fill it out prior to the site investigation. This task will allow the project team to have a greater understanding of site conditions.

Task 2.2: Conduct Site Investigation
Travel to the project area, perform a site walk, take site photos, and return to NAU. A photo log will be assembled with figure numbers and descriptions to document the site investigation.

Task 3: Hydrologic Analysis
This task requires analysis of the surrounding areas that affect the proposed roadway and determining the effects the water flow may have. HEC-HMS will be used to model storm events, which will determine roadway elevations to prevent flooding.

Task 3.1: Delineate Watershed
Determine the contributing areas that affect the proposed project using USGS Streamstats. Interface this data with Google Maps to create a reference map. This area will be used to calculate the flow of runoff water in the project area.

Task 3.2: Determine Rainfall Intensity
Using data from the NOAA, analyze IDF curves to determine the rainfall intensity during a storm event. This data will be used with the watershed area to determine the flow of runoff water in the project area.

Task 3.3: Determine Peak Flow
Calculate the peak flow in the watershed area during multiple storm events using the calculated watershed area and rainfall intensity. This flow value will allow the project team to design proper conveyance infrastructure.

Task 3.4: Model Within HEC-HMS
Collect watershed area, rainfall intensity, time of concentration, and peak flow. Input all the data into HEC-HMS to create a model to determine how much water will affect the proposed roadway.

Task 4: Hydraulic Analysis
This task includes analysis of the flood zone conflicting with the proposed roadway and creating a solution to convey storm events underneath the roadway. Hydraulic structures will be in accordance with the Coconino County Drainage Design Manual. The final design will be modeled in HEC-RAS and CulvertMaster to ensure requirements are met.

Task 4.1: Determine Floodplain Elevation
Access FEMA Floodplain Insurance Studies in the project area. Work with Professional Engineer(s) to determine floodplain elevation with data from FEMA FIS. This floodplain elevation will impact the drainage infrastructure on the project to ensure that existing floodplains are not negatively impacting the new roadway or surrounding areas.

Task 4.2: Analyze Potential Hydraulic Structures
Use floodplain elevation to determine where drainage infrastructure is necessary. Use the Coconino County Drainage Design Manual to determine the design of the proposed infrastructure. This drainage design will ensure that the flood waters will not negatively impact the new roadway or surrounding areas.

Task 4.3: Model Hydraulic Structure
Use HEC-RAS and CulvertMaster software to model drainage design and ensure Coconino County standards are met. These hydraulic models will be integrated into the overall design to ensure that this project maintains proper drainage along the alignment.

Task 5: Traffic Analysis
The team will analyze present and future traffic patterns to determine traffic demand for the proposed roadway. Using the data collected in prior tasks, this will ensure that the project meets the client’s and stakeholder needs.

Task 5.1: Determine Future Traffic
Forecast 20-year AADT and peak flows using growth, land-use buildout, and trip assignment. Select functional classification and facility type (e.g., arterial/collector, divided/two-lane) based on context and demand.

Task 5.2: Determine Connections into Existing Roadway
Define tie-in locations and transitions where the project interfaces with existing streets and access points. Select the type of traffic control at roadway connections according to the MUTCD manual. This will ensure that the new roadway does not impact existing infrastructure.

Task 5.3: Determine Need for Turn Lanes
Check warrants and operations to size left/right turn lanes at intersections. This will provide insight on the possible changes to the roadway and ensure that all future development has proper access.

Task 5.4: Determine Signage on Roadway
Develop regulatory, warning, and guide sign plans per MUTCD for clarity and compliance. Additionally, establish a statutory or study-based speed consistent with design speed, context, and safety.

Task 6: Roadway Design
The team will produce a roadway design from the geotechnical, hydrological, hydraulic, and traffic analysis completed, ensuring the roadway design meets Coconino County requirements.

Task 6.1: Determine Design Vehicle and Design Speed
Analyze the current and future traffic to determine the most common vehicle and design speed. This will be used to determine the loadings the roadway needs to handle. This will also ensure that the roadway meets all stakeholder needs.

Task 6.2: Determine Horizontal Alignment
Create a horizontal alignment that creates safe turns for drivers at the posted speed limit. This task will ensure that the new roadway meets both Coconino County and AASHTO specifications.

Task 6.3: Determine Vertical Alignment
Ensure there is proper visibility in any vertical alignment and create smooth transitions from grade changes. This task will ensure that the new roadway meets both Coconino County and AASHTO specifications.

Task 6.4: Structural Section
Research proper subgrade and base course for the proposed alignment and make sure it meets Coconino County design standards. Determine the thickness of the aggregate base course, asphaltic concrete, and the thickness of each pavement lift. This will ensure that the roadway can operate for the design life span while serving all users.

Task 6.5: Typical Cross Section
Ensure the subgrade, base coarse, and pavement have sufficient strength to convey traffic for twenty years. Developing this cross section will ensure that the new roadway meets all the clients and stakeholder needs.

Task 6.6: Determine Roadway Drainage
Ensure the roadway does not flood during storm events and drains water efficiently. With the results of prior hydraulic and hydrologic tasks, the roadway drainage will be designed to ensure that the new roadway meets all required Coconino County specifications.

Task 6.7: Pavement Markings/Striping Layout
Create a safe striping layout that allows cars to turn, stop, and flow safely and efficiently. This will ensure that the new roadway does not impact existing infrastructure and serve all users equitably.

Task 6.8: Select Horizontal and Vertical Alignment
Establish multiple alternative horizontal and vertical alignments. Consider earthwork volumes, cost, and drainage infrastructure to create the best design. A weighted decision matrix will be created to analyze and choose the best option with input from the client. All alternatives will meet the criteria in the Coconino County Engineering Design Manual.

Task 7: Site Design
This task involves calculating the cut and fill volumes for minimization, creating slopes, and incorporating utilities for the proposed roadway.

Task 7.1: Determine Cut/Fill
Analyze the existing terrain of the proposed alignment and determine how much soil needs to be excavated or filled. This will be designed with results from the prior vertical and horizontal alignment tasks to ensure that the clients needs are met and that the design is optimized.

Task 7.2: Determine Site Grading
Create proposed roadway elevations that allow for proper drainage. Design slopes next to the roadway that minimizes danger if drivers drive off the roadway. This will ensure all users safety for the lifetime of the roadway.

Task 7.3: Utility Design Ensure
The proposed roadway design will include a standard utility corridor . This will allow future development to have access to all necessary utilities.

Task 8: Create a Plan Set
This task includes creating a construction/design plan set that establishes the new roadway alignment in correspondence to the existing conditions of the site. It will outline the team's design that considers Coconino standards for construction and drainage. This plan set is to be made in reference to the construction and improvement plan requirements of Coconino County’s CADD Manual.

Task 8.1: Plan Set Border/Template
A template will be created for the team to use by making a .dwt file and a block with attributes to quickly set up page layouts.

Task 8.2: Cover Page
The cover page will include the project name, coordinates, vicinity map, key design data, index of sheets, and a legend.

Task 8.3: Estimated Quantities/EOPC
Estimated quantities will be derived in AutoCAD through layer usage, hatching, and measuring. Major items with units will be determined by the team, and prices will be based on past County projects. This will be shared with the client as the project progresses to ensure that the client is aware of estimated construction costs.

Task 8.4: Notes Sheets
The general notes sheet will have the latest applicable County notes for the improvements proposed, including pavement and utility notes.

Task 8.5: Proposed Cross-Section/Typical Cross-Section
A cross-section sheet will be made outlining the roadway's characteristics, such as widths and horizontal slopes.

Task 8.6: Existing Site Conditions and Removals
This sheet will lay out the existing topography and will call out removals that are needed on the site in plan view.

Task 8.6.1: Topographic Data
Public data will be acquired from Coconino County for 2’ contours. This will be brought into CAD to create a topographic map.

Task 8.6.2: Existing Landmarks from Aerial Imagery
An aerial will have to be used to roughly outline the location of important landmarks such as existing striping, signage, and infrastructure.

Task 8.7: Proposed Improvements (Plan and Profile)
This sheet will indicate the proposed design with call outs for improvements to be made in reference to standards and details. It will be a plan view of the alignment. Along with these improvements, profiles will be displayed beneath with matching stationing. A drainage plan and profile will also be made containing information regarding proposed culverts and other drainage infrastructure.

Task 8.8: Plan Details
This page will depict the pavement structural cross-section of the proposed alignment. It will also reference any other supplementary details that would be beneficial for clarity or are modified from Coconino or MAG details.

Task 9: The team will determine the future impacts the roadway will have, such as on roadway capacity and future development, in reference to its 20 year lifetime. It is important that the team develop an analysis to predict and mitigate potential consequences that the project may have. This will include social, environment, and economic factors to access holistic sustainability.

Task 10: Deliverables
This task involves creating quality and complete deliverables throughout the project schedule. They are valuable to effectively communicate the proposed design of the roadway.

Task 10.1: 30% Deliverables
The team will complete Tasks 1.0 - 3.0 completely and incorporate findings into the final report and 30% presentation.

Task 10.2: 60% Deliverables
The team will complete Tasks 4.0 - 6.0 entirely and include findings in the final report and 60% presentation. The team will also begin creating a plan set.

Task 10.3: 90% Deliverables
The team will complete Tasks 7.0, complete a conceptual plan set, and begin the creation of the project website. The team will also put together the first version of the final report.

Task 10.4: Final Deliverables
The team will finish the remaining tasks, Tasks 8.0 and 9.0, and finalize the report, presentation, and website. These final deliverables are important to communicate the design professionally and effectively.

Task 11: Project Management
This task involves managing meetings, schedules, and resources to deliver a quality project. This will ensure that the project team maintains proper communication and remains on schedule for project completion.

Task 11.1: Meetings
All meetings held with the client, technical advisor, and grading instructor will be included in this item. This includes meeting set-up, meeting agendas, and communication with the client, technical advisor, and grading instructor.
Task 11.2: Schedule Management
The team will ensure the project is delivered on time and will stick to the schedule as best as possible. If the schedule needs to be adjusted, it will be adjusted so that the project can be delivered at the original due date. It’s important for the team to reference this schedule to make sure the project is completed with quality.

Task 11.3: Resource Management
The team will manage resources such as software, engineering reports, and information from the technical advisor. This will help the team to deliver a quality product and to allocate resources.

Exclusions The team will exclude utility plans, traffic impact analysis, and existing tie-in elevations & coordinates. These tasks would be required for a fully usable plan set, but it is outside the scope of this project. The team will incorporate room in the roadway for utilities, but will not provide notes regarding utilities. Notes for installation and information would fall into the utility company’s scope of work. The team will not be creating a traffic impact analysis since the team is focused on developing the design of the roadway. The team will not perform any surveying in the area. In later phases of this design, specific existing elevations and coordinates will be needed for the tie-in areas.