South Wilmington Wetland Park

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SWWP Contractor Notification

The City of Wilmington, Delaware plans to solicit for qualified contractors to construct a major wetland rehabilitation, stormwater management and recreational park project in the fall of 2018. Construction is anticipated to begin in spring of 2019. This project will be the first phase of a combined sewer separation project to reduce the frequency of flooding in southern areas within Wilmington’s city limits. This notice is issued solely to provide general information and contractor requirements to potential bidders. This is not a solicitation announcement for proposals, and no contract will be awarded as a result of this notice.

The work included under this contract will include but not be limited to:

  1. excavation of approximately 100,000 cubic yards of soil in and around an existing wetland;
  2. reuse of 30,000 cubic yards of soil on-site;
  3. transportation of approximately 70,000 cubic yards of soil to a nearby off-site location;
  4. construction of wetland features;
  5. construction of at grade and boardwalk trails;
  6. installation of stormwater piping and tide gates;
  7. topsoil placement and installation of wetland and upland plants.

Contractors bidding on the project will be required to provide qualifications and specialized experience on projects of similar scope and scale meeting the minimum requirements below.  Use of subcontractors to meet minimum qualifications and specialized experience is acceptable.

For additional information about the project please visit  https://www.WilmingtonDE.gov/wilmingtonwetland or contact Bruce Jones at bwjones@rkk.com.

Definitions

Non-Wetland Specific Work – Non-Wetland Specific Work is defined as all work not defined as Wetland Specific Work.

Wetland Specific Work - Wetland Specific Work includes: final grading of wetland contours and placement of topsoil for wetlands; wetland plant/seed bed preparation including soil de-compaction procedures; acquisition of native species wetland seed, trees and shrubs; seeding of native wetland plant species; planting of native species wetland trees and shrubs; establishment of native species wetland seed, shrubs and trees; invasive species control during construction; invasive species control during wetland plant establishment/warranty period.

Minimum Qualifications - Non-Wetland Specific Work

The contractor or subcontractor conducting the Non-Wetlands Specific Work shall meet or exceed the minimum qualification criteria below.

The contractor conducting the non-wetlands specific work:

  1. shall have completed a minimum of 2 projects in the past 5 years demonstrating earth excavation with cut and fill requirements of a minimum 70,000 cubic yards in wet soils or a wetland environment and subsequent earthwork shaping experience with proficiency to achieve target contour elevations, cross section geometry and wetland specifications.  The projects shall demonstrate bulk excavation, handling and drying of wet soils, soils dewatering and/or ground water control, pump arounds, and erosion and sediment control measures.
  2. shall demonstrate the ability to transport a minimum of 70,000 cubic yards of wet soil off-site to a designated location within a 10-mile radius in a 4-month period. 
  3. shall have completed a minimum of 2 projects in the past 5 years demonstrating construction in tidal riverine environment. The projects shall demonstrate tidal erosion and sediment control techniques, and riverine construction techniques.
  4. shall have completed a minimum of 2 projects in the past 5 years at brownfield sites or other contaminated material sites where contaminated materials training and management was required.
  5. shall have an owner or foreman who has completed 40-hour OSHA HAZWOPER training and has acted as owner or foreman on 2 projects in the past 5 years where contaminated materials training and management was required.

Minimum Qualifications - Wetland Specific Work

The contractor or subcontractor conducting the Wetlands Specific Work shall meet or exceed the minimum qualification criteria below. 

The contractor or subcontractor conducting the Wetlands Specific Work:

  1. shall have an owner or foreman with training in restoration ecology (e.g., a bachelors or master’s degree in conservation biology, wildlife, ecology botany, landscape architecture or related field or other equivalent specialized training). 
  2. shall have a Botanist or Ecologist on staff with at least five (5) years’ project field experience in the following: accurate botanical field identification skills, identification of suitable hydrologic conditions for all specified plant species, plant installation within diverse hydrologic conditions, invasive species identification and control. The botanist or ecologist will be required to be onsite during all aspects of ecological management.
  3. Shall have successfully completed a minimum of 2 projects in the past 5 years of similar scope and scale as the SWWP.  Specifically, the project must have included:
    1. A minimum of 10 acres of wetlands restoration;
    2. Final grading of the following wetland zones: littoral, emergent, riparian;
    3. Acquisition, planting and establishment of herbaceous, tree, and shrub species native to Delaware in the littoral, emergent, and riparian planting zones in quantities greater than 2,000 plants;
    4. Compliance with federal, state and local wetlands and/or subaqueous lands permits.
    5. Invasive species control during construction and during plant establishment period
    6. Acquisition and placement of a minimum of 20,000 cubic yards of topsoil suitable for growing wetland plants;
    7. Utilized low ground pressure equipment and/or mating to protect restored areas and included soil de-compaction measures or techniques to prepare restored areas for planting;
  4. shall have completed a minimum of 2 projects in the past 5 years at brownfield sites or other contaminated material sites where contaminated materials training and management was required.
  5. shall have an owner or foreman who has completed 40-hour OSHA HAZWOPER training and has acted as owner or foreman on 2 projects in the past 5 years where contaminated materials training and management was required.