Site Preparation + Corridor Clearing
Scope Tip
Clearly define the corridor-clearing limits and vegetation-removal requirements, including clearing width and height, tree or vegetation retention requirements, and any tree-size thresholds for removal. Also identify whether clearing dimensions are fixed or may vary based on terrain, construction needs, and site conditions.
Scope Item Definition
Prepare the trail corridor for trail construction by clearing or managing vegetation, trees, logs, rocks, debris, and other materials as needed to safely access and construct the trail while protecting resources and minimizing unnecessary disturbance.
Site preparation and corridor clearing should be based on the approved trail alignment, construction specifications, limits of disturbance, and applicable permit or resource-protection requirements.
When / Where It Applies
Site preparation and corridor clearing are typically among the first activities completed once the trail alignment has been approved for construction. Depending on the site and construction method, this work may range from relatively minor brushing and pruning to tree removal, clearing of dense vegetation, removal or relocation of logs and rocks, and preparation of the corridor for trail construction.
The amount of clearing needed may vary considerably along a project. The construction corridor may also be wider than the finished trail tread to provide the working space necessary for excavation, equipment movement, material handling, and construction of trail features.
Scope Considerations
Depending on the project, the scope should consider and clearly define:
Trail alignment and construction corridor or limits of disturbance.
Required clearing width and vertical clearance, including whether dimensions are fixed or may vary based on terrain, vegetation, trail type, construction method, and site conditions.
Brushing, pruning, limbing, and removal of vegetation.
Tree, sapling, stump, root, and blowdown removal requirements, including any restrictions on which vegetation may be removed.
Treatment of logs, woody debris, rocks, slash, and other materials encountered within the construction corridor.
Whether cleared materials should be removed, dispersed, stockpiled, reused in construction, or incorporated into site restoration.
Protection of vegetation, soils, cultural resources, waterways, wetlands, habitat, or other resources outside the approved disturbance area.
Required erosion and sediment-control measures during site preparation.
Timing and seasonal considerations, including the most appropriate time for clearing based on vegetation, soil and weather conditions, site access, resource protection, and any permit or seasonal restrictions.
Construction access, equipment limitations, and staging or material-storage areas that affect how site preparation can be completed.
Responsibility for identifying and marking the alignment, construction limits, vegetation to remain or remove, sensitive resources, and other protected areas before work begins.
Whether contractors should be required or strongly encouraged to visit the project site before bidding, particularly where vegetation, rock, terrain, access, or other conditions are difficult to adequately communicate through plans, photographs, or other solicitation materials.
Owner-Provided Information
The owner should provide the following, if available and applicable:
Approved trail alignment and associated maps, GIS data, plans, or field markings.
Trail specifications and applicable construction drawings.
Defined construction corridor or limits of disturbance.
Known vegetation conditions and requirements for vegetation removal or retention.
Known rock, terrain, drainage, or other site conditions likely to affect the work.
Known sensitive resources and required protection measures.
Applicable permits, environmental decisions, mitigation requirements, and seasonal restrictions.
Access routes, equipment restrictions, staging locations, and material-storage limitations.
Available site photographs, videos, surveys, inventories, or other information that helps contractors understand existing conditions.
Construction Specifications + Contractor Discretion
The solicitation should clearly identify which clearing limits, resource-protection requirements, and vegetation treatments are fixed and where the contractor may adjust the work based on field conditions.
Where appropriate, contractors may need flexibility to determine the minimum clearing necessary to safely and efficiently construct the trail while achieving required trail specifications and protecting surrounding resources. Any limits on equipment movement, tree removal, excavation, material placement, or disturbance outside the finished tread should be clearly defined.
Completed Work / Deliverables
Depending on the scope, completed work may include:
Trail corridor cleared to the required specifications.
Vegetation pruned or removed as specified.
Trees, logs, rocks, slash, and debris treated or managed as required.
Construction work areas prepared where included in the scope.
Required erosion, sediment, and resource-protection measures installed and maintained.
Disturbance contained within applicable construction limits.
Cleared or generated materials appropriately reused, stockpiled, dispersed, or removed.
Quality Assurance + Acceptance
The solicitation should define how completed site preparation and corridor clearing will be evaluated and accepted, including compliance with the approved alignment, clearing specifications, limits of disturbance, vegetation-retention requirements, resource-protection measures, and permit conditions.
Acceptance should consider whether the corridor provides adequate space for the required construction while avoiding unnecessary disturbance outside the approved work area.
Pricing & Payment Considerations
Site preparation and corridor clearing may be included in the overall trail construction price or priced separately, depending on the project and bid structure. Common approaches include:
Included in a trail construction unit price or lump-sum price.
Priced separately by linear foot, mile, area, or specific item.
Priced by crew or contractor day rate where work is difficult to quantify and appropriate oversight or contractor trust is established.
Priced on a time-and-materials basis where conditions or quantities cannot reasonably be determined in advance.
Pricing should account for vegetation type and density, clearing width, terrain and rock, access and equipment limitations, material handling or disposal, and timing or seasonal constraints that may affect the work.
Where conditions vary significantly, provide enough site information for contractors to reasonably estimate the work. Unit pricing for uncertain quantities can also provide a clear basis for pricing changes during construction.
Common Scope & Contracting Issues
Defining only the finished tread width without defining the construction corridor or allowable limits of disturbance.
Not identifying vegetation or resources that must remain protected.
Unclear responsibility for marking the alignment, clearing limits, or vegetation to be removed.
Treating corridor clearing as general forestry or vegetation-management work without accounting for its relationship to trail construction.
Failing to define how logs, slash, rocks, and other cleared materials should be handled.
Not providing enough information about vegetation density, rock, terrain, access, or other site conditions for contractors to reasonably estimate the work.
Not considering the appropriate clearing window for the site or landscape, including seasonal conditions, access, resource protection, permit requirements, erosion and sediment control, and how the timing of clearing relates to subsequent construction.
Not providing an opportunity for contractors to evaluate site conditions before bidding, particularly where vegetation, rock, terrain, access, or other conditions may substantially affect the level of effort.
Not establishing how significant differences between anticipated and actual clearing conditions will be addressed and priced.