Conwell Street Green Infrastructure

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Proposals are due by March 2, 2020.

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Conwell Street Green Infrastructure Project.

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The Nanticoke Watershed Alliance, in partnership with the City of Seaford, is requesting proposals to develop Conwell Street in Seaford, DE.

We seek a dynamic firm to develop engineered designs by the Spring of 2021.

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Please download the Request for Proposals above, which includes a conceptual design for the area.

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Conwell Street currently has flooding issues due to having only one storm drain that frequently gets clogged by leaves and debris.  The stormwater than overflows the curb at the end of the street flows down a steep embankment, causing erosion, and runs off directly into the Nanticoke River.  The conceptual design seeks to add 6 stormwater bump-outs, a bio-retention area at the end of the road and a scenic overlook area above the river.  The City of Seaford also plans to match the current look and feel of the contiguous main shopping corridor, High Street with the pathway on both sides of Conwell Street, lookout area, and educational signage at the lookout area. 

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This is a conceptual design of Conwell Street representing what the NWA would like to see developed.

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Proposals should be submitted to:

Lisa Wool
Executive Director
Nanticoke Watershed Alliance
LisaWool@NanticokeRiver.org
302-562-9788

 

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The information found on the Request for Proposals form can be read below:
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Background Information

The mission, goals, and objectives of the Nanticoke Watershed Alliance (NWA) are developed by consensus with our partnership. The Alliance includes partners from Maryland and Delaware, including representatives from industry, agriculture, environment, business, community, state, local, and federal governmental organizations.

The Nanticoke River is a 64-mile river that begins in southern Delaware and flows southwest into the Eastern Shore of Maryland, emptying into the Chesapeake Bay. One of the Chesapeake’s healthiest rivers, the Nanticoke’s 725,000-acre watershed provides excellent habitat of significance for many nationally threatened plants and animals. The Nanticoke is the most biologically diverse watershed on Delmarva and supports excellent fisheries. It has a rich history, properties on the National Register of Historic Places, and the northernmost stands of bald cypress on the Atlantic Coast. It also has the highest concentration of Bald Eagles in the northeastern United States.

 

NWA’s Mission:  Fostering partnerships and progress in conserving the natural, cultural, and recreational resources of the Nanticoke River Watershed through dialogue, collaborative outreach, and education.

 

NWA’s Core Values:

  • Conservation– The health of the Nanticoke River watershed is paramount.
  • Collaboration– We embody partnership through action.
  • Communication– We value diverse voices and viewpoints where all have a place at the table. We embrace constructive and open dialog as a means of problem-solving.
  • Scientific integrity– We rely on sound science to assess the health of the watershed and share information with the community.
  • Education– We are committed to sharing with others the importance of conserving the watershed.

 

The NWA has three full-time employees that coordinate a wide variety of projects and programs.  Visit www.NanticokeRiver.org to learn more. 

 

 

Scope of Services

The Nanticoke Watershed Alliance in partnership with the City of Seaford is requesting proposals to develop engineered designs for the Conwell Street Green Infrastructure Project.  Attached are conceptual designs developed out of a charette coordinated by the U.S. EPA, DNREC, City of Seaford, local businesses, concerned citizens and the Nanticoke Watershed Alliance.

 

Conwell Street currently has flooding issues due to having only one storm drain that frequently gets clogged by leaves and debris.  The stormwater than overflows the curb at the end of the street flows down a steep embankment, causing erosion, and runs off directly into the Nanticoke River.  The conceptual design seeks to add 6 stormwater bump-outs, a bio-retention area at the end of the road and a scenic overlook area above the river.  The City of Seaford also plans to match the current look and feel of the contiguous main shopping corridor, High Street with the pathway on both sides of Conwell Street, lookout area, and educational signage at the lookout area. 

 

The NWA seeks a dynamic firm to work with the City of Seaford, the Nanticoke Watershed Alliance and interested parties within the City to develop engineered designs by Spring 2021. Services must include:

 

  1. Site map that includes:
        • Property boundaries;
        • Project boundary;
        • Field-run topographic survey of existing conditions;
        • Drainage area to the practice and impervious cover in the drainage area;
        • Mapped utilities and roads;
        • Proposed design (grade changes, drainage structures, rock placement, etc.); and
        • Landowner signature on the plan, which indicates project endorsement
  1. Copy of soil survey mapping and field confirmation of soil drainage class;
  2. Site details (e.g., topographic lines, land uses, and soils)
  3. Planting plan (plant locations and plant types);
  4. Site photos; and
  5. Calculations of
        • Total drainage area treated;
        • Impervious acres treated; and
        • Estimated cost per acre treated (at a one-inch runoff level).
  1. Cost projections for full implementation, operation, and maintenance. Funders consider a truly cost-effective project as one that costs less than $100,000 per impervious drainage acre treated (at a one-inch runoff level), not including costs of gray infrastructure elements.

 

Evaluation Criteria

A review and selection committee made up of Nanticoke Watershed Alliance and the City of Seaford Staff will evaluate the consultants based on the proposals submitted.  If necessary, an oral interview may be conducted with submitting consultants. 

Ranking of the Proposals will be based on the following point system (100 points maximum):

  1. Inclusion of all required items and completeness of the Proposal (5 points)
  2. Understanding of the work to be done (25 points)
  3. Previous experience of similar projects completed on time and within budget (20 points)
  4. Qualified and experienced personnel in the project team (15 points)
  5. Capability of developing innovative or advanced techniques (10 points)
  6. Familiarity with county, state and federal procedures (10 points)
  7. Commitment to adhering to the project schedule and budget (5 points)
  8. Clear description of the tasks and demonstrated technical ability (10 points)

 

Application Instructions

Interested firms are invited to submit a proposal by March 2, 2020. The work described in the proposal is expected to be completed by May 30, 2021

The proposal should include:

  • Staff qualifications
  • Proposal narrative
  • Preliminary work plan and timeline
  • Itemized budget

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