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Section 4: PS&E Development

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Overview

This group of activities represents the final design stage of the project development process. The landscape architect(s) assigned to the project at this stage are responsible for guiding the development of the landscape and aesthetic related portions of the project as well as coordinating preparation of PS&E for related environmental mitigation called for in permits and agreements.

Many of the elements that impact on landscape and aesthetic design overlap into all parts of the final design process. Typically these areas include:

Each of these design areas will have responsibility for roadway components that must be coordinated to meet landscape and aesthetic design goals of the project. The TxDOT landscape architects together with any consultants have the responsibility for coordination between the various areas of responsibility.

This section groups tasks into the following areas:

A final note in this section discusses the nature and timing of the process, which may vary slightly based on specific situations in each project.

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Design Conference and Detailed Design Plan

The primary instruments for ensuring that landscape and aesthetic goals will be met are the Landscape and Aesthetics Assessment and the Landscape and Aesthetics Master Plan. (LAMP) The following subsections describe how the landscape architect may participate in the project development steps to obtain additional or updated data and conduct design conference.

After the design conference, the landscape architect will participate in detailed design and follow through to final design plans, specifications, and estimates. Subsections in this section describe how landscape architects contribute to the process for the following design areas:

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Obtain Additional or Updated Data (5010)

Action items

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  • Visit the site and prepare brief summary of existing conditions; note any conditions that will require additional field information.
    • Anchor: #EKGMHOTM
  • Advise the project manager of any additional data requirements necessary to complete landscape and aesthetic based plan work.

For specific information on this project development task, refer to the PDPM under the task number referenced in the subsection heading.

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Conduct Design Conference (5020)

The project landscape architect should attend all design concept meetings to be aware of all the concerns impacting on the final design.

Action items

    Anchor: #KTOTQWIN
  • Provide the project manager with information related to landscape and aesthetic issues that will impact the preparation of the work plan and schedule; be alert to seasonal timing related to revegetation and reforestation of all types.
    • Anchor: #UKMLGDME
  • Advise the project manager in writing of any needs for special consultants or recommendations for in-house staff assignments.
    • Anchor: #AHTNURRM
  • Prepare scope of services for landscape and aesthetics related consultants.

For specific information on this project development task, refer to the PDPM under the task number referenced in the subsection heading.

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Plan Sequence of Construction (5040)

The construction sequence often involves a variety of water quality measures and temporary erosion control issues where the landscape architects expertise can be utilized.

Action item

    Anchor: #SFWGGIEE
  • Project landscape architect advises the project manager of suggested order of revegetation, erosion control, and reforestation; consideration should be given to phased planting early in the construction process to minimize cost of temporary erosion control.

For specific information on this project development task, refer to the PDPM under the task number referenced in the subsection heading.

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Design Environmental Mitigation Details (5100)

Different groups depending on the project, the district, and the nature of the work prepare Environmental mitigation plans. In most cases the landscape architect is the professional with knowledge of design involving biologic processes and the skills needed to coordinate the preparation of technical PS&E. The goal of this part of the process is to meet the environmental commitment with the most cost effective and sustainable solution.

Action item

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  • Provide services necessary to coordinate the preparation of final PS&E for biological mitigation plans.

For specific information on this project development task, refer to the PDPM under the task number referenced in the subsection heading.

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Review Data Collection Needs (5120)

Review data requirements for developing final PS&E for landscape and aesthetic elements and for any environmental mitigation work that is being included in the contract.

Action item

    Anchor: #TNKAKLCA
  • Advise the project manager of any additional data needs for preparation of PS&E.

For specific information on this project development task, refer to the PDPM under the task number referenced in the subsection heading.

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Final Alignment Profiles

The project landscape architect should review the development of final alignments and advise the project manager of issues related to revegetation and reforestation and erosion control.

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Design Final Vertical and Horizontal Alignments (5200)

As the alignments are finalized the project landscape architect should finalize the work schedule for completion of PS&E for landscape and aesthetic design.

Action item

    Anchor: #TIOFEYEH
  • Review final alignments; advise the project manager in writing of any special requirements for erosion control, revegetation, or reforestation related to alignment decisions.

For specific information on this project development task, refer to the PDPM under the task number referenced in the subsection heading.

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Roadway Design

During this step, the landscape architect will assist with tasks to:

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Design Landscape/Aesthetics Plans (5280)

Action items

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  • Distribute the corridor LAMP elements to all design sections involved in the project; indicate those portions of the plan that may have a significant impact on final design.
    • Anchor: #HXOKYMFL
  • Provide coordination services with all design units related to landscape and aesthetic concerns.
    • Anchor: #KCAPDOFF
  • Hold a landscape and aesthetics conference to review specific landscape and aesthetic goals and to discuss issues that need to be addressed in preparation of the final plans.
    • Anchor: #WSYFYIPG
  • Distribute copies of the LAMP for the project corridor.
    • Anchor: #UIISMQCY
  • Advise each section in writing of special provisions that may impact the final design.
    • Anchor: #LMWCQRVO
  • Coordinate the preparation of final plans that relate to landscape and aesthetic issues.

For specific information on this project development task, refer to the PDPM under the task number referenced in the subsection heading.

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Develop Plan and Profile Sheets (5290)

On projects where reshaping of the land is desirable for reasons of aesthetics or to assist in the revegetation and erosion control process the landscape architect should work with appropriate design sections to achieve the design goals.

Action item

    Anchor: #WBTWPDQL
  • Advise roadway design of any areas involving special earthwork; this would relate back to work in development of the final alignments.

For specific information on this project development task, refer to the PDPM under the task number referenced in the subsection heading.

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Design Bicyclist and Pedestrian Facilities (5300)

Action item

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  • Prepare plans for pedestrian and bicycle accommodation; coordinate with roadway design or other appropriate design sections on alignments and special pavement treatments.

For specific information on this project development task, refer to the PDPM under the task number referenced in the subsection heading.

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Design Miscellaneous Details (5330)

Action items

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  • Prepare miscellaneous details for landscape and aesthetics related treatments; this includes details for walls, pedestrian accommodation and amenities, special surface treatments, etc.
    • Anchor: #BGNSPSHG
  • Develop special details related to pedestrian, bicycle, or landscape treatment and forward to roadway design.

For specific information on this project development task, refer to the PDPM under the task number referenced in the subsection heading.

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Operational Design

This step encompasses a plan for illumination design.

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Design Illumination (5380)

Action item

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  • Forward recommendations for special hardware, poles etc. to bridge and roadway design to coordinate the aesthetic character of the corridor.

For specific information on this project development task, refer to the PDPM under the task number referenced in the subsection heading.

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Bridge Design

In the bridge design step, the landscape architect may be called upon to assist with detailed bridge design plans.

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Prepare Bridge Details (5500)

Landscape and aesthetic details of the project should be coordinated with bridge details. It is important that bridge details are consistent with and complementary to the elements of the LAMP.

Action item

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  • Coordinate aesthetic design details with bridge design; work with bridge section to integrate all landscape and aesthetic details.

For specific information on this project development task, refer to the PDPM under the task number referenced in the subsection heading.

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Drainage Design

In drainage design, the landscape architect contributes to tasks that:

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Prepare Culvert and Storm Drain Details (5570)

There are a number of structures involved in the final design of the drainage system. As appropriate, details of drainage structures should be developed to fit into the landscape and aesthetics scheme of the corridor. This includes elements such as head- and end-walls, guardrails, and pumping facilities. The primary goal is to ensure that the style, finishes, and materials are consistent with the LAMP.

Action item

    Anchor: #YMQWVFNO
  • Advise the hydraulics section of any design inconsistencies with the LAMP.

For specific information on this project development task, refer to the PDPM under the task number referenced in the subsection heading.

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Design Storm Water Pollution Prevention Plan (SW3P) (5600)

Action items

    Anchor: #RWGOHTET
  • Recommend seeding and planting for temporary and permanent erosion control; advise on the application and PS&E for use of bio-technical stabilization techniques.
    • Anchor: #VRLUEREU
  • Forward details for permit purposes.

For specific information on this project development task, refer to the PDPM under the task number referenced in the subsection heading.

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Retaining/Noise Walls and Miscellaneous Structures

This step includes efforts to prepare retaining and/or noise wall layouts, plans, and detailed design.

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Prepare Retaining and/or Noise Wall Layouts (5640) and Prepare Retaining and/or Noise Wall Plans and Details (5680)

Action items

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  • Work with appropriate design section(s) on landscape and aesthetic issues related to wall locations.
    • Anchor: #RNGOPNIM
  • Review retaining wall layouts and details; make recommendations for finishes and treatments the fit the LAMP.

For specific information on these project development tasks, refer to the PDPM under the task numbers referenced in the subsection heading.

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PS&E Assembly and Design Review

During PS&E assembly and design review, the landscape architect will be involved with work to conduct environmental re-evaluation and determine resulting plan changes. The landscape architect may also help the prepare PS&E package and be involved as the district performs final review of PS&E.

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Conduct Environmental Re-Evaluation and Determine Resulting Plan Changes (5810)

This is the step in the process that brings together activities in the Preliminary Design Process with the Environmental Process during Plans Specification and Estimate (PS&E) development.

Action item

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  • Project landscape architect provides project manager written comments documenting changes in approved preliminary schematics as a result of the environmental process.

For specific information on this project development task, refer to the PDPM under the task number referenced in the subsection heading.

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Prepare PS&E Package (5830)

Action item

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  • Provide project manager with all PS&E documents prepared by landscape section.

For specific information on this project development task, refer to the PDPM under the task number referenced in the subsection heading.

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District Performs Final Review of PS&E (5900)

Action item

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  • District landscape architect or consultant participates in the review of PS&E Package.

For specific information on this project development task, refer to the PDPM under the task number referenced in the subsection heading.

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Nature and Timing of the Process

The process as outlined here, and in other manuals, appears linear. This is not the case. The process is iterative and seldom follows an orderly pattern. Each project will be different and involve varying degrees of input at each point in the process. What is important is that the landscape architects or appropriate consultants be active in the process, and provide input on landscape and aesthetic issues to ensure that the highway corridor meets department and client expectations.

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