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The Situation We are a 56-home HOA with a private dry detention basin (Outlot E, approx. 0.5 acre) that has never drained since it was built in 2001 to 2002. This approach has already been discussed with the City of Brooklyn Park and the West Mississippi Watershed Management Commission, and does not require permit submittal or approval from either. Essentially we have a bathtub with the plug in. We need drain tile or an underdrain designed to drain it. Why it doesn't drain The basin floor was built flat at elevation 841.0 ft, identical to the outlet invert. Both inlets sit slightly below the outlet (elevation 840.94 and 840.97 versus 841.0). Water entering at the inlets has no gravity path to the outlet once it's in the center of the basin. The existing outlet (SK1, 12-inch RCP skimmer) drains within one to two days near the outlet itself, but the center of the basin stays wet. 2019 site visit (American Engineering Testing): On November 13, 2019, AET performed two hand auger borings in the basin to a depth of 4.5 feet. Soils at both locations were topsoil and organic black material throughout. AET concluded the pond's soils were not suitable for infiltrating water, and that the soils between the inlet and outlet appeared unsuitable for proper sloping and drainage into the outlet. May 2026 dredge: We removed roughly 12 to 18 inches of accumulated sediment and organic material and restored the basin to its 841.0 design elevation. Standing water persisted in the center afterward. June 2026 follow-up dig: A month later, with the basin still holding water, our excavator and the City's civil engineer dug down an additional 4 feet into the center of the basin at several locations. They still encountered organic material, silt, and very fine sand throughout, confirming there is no infiltratable soil even several feet below the post-dredge grade. Grading limitation: The center of the basin is unsuitable muck to significant depth, confirmed by both AET's 2019 borings and the June 2026 follow-up dig. It cannot be graded or compacted to create positive slope. It must be removed and replaced with clean granular material wherever the design requires stable grade or bedding. Vegetation and sediment history: For roughly 23 years no vegetation was removed from the basin; cattails cut in 2017 were left to decompose in place, adding organic material to the basin floor annually. Neither inlet has sediment pretreatment, so street sediment has washed in unchecked the entire time. Scope Design a drain tile or underdrain system that collects water from the basin floor, bypasses the existing outlet structure and its catch basin entirely, and runs by gravity to a downstream storm sewer manhole. The existing outlet stays in place, functioning only as high water overflow, no longer the primary drain. Two options to evaluate: Option 1 (preferred): Excavate only deep enough to bury the pipe. Pipe must still be bedded and surrounded in clean drain rock or aggregate with filter fabric or sock, backfilled with clean sand to grade. The existing muck cannot be reused as backfill or bedding. Our concern is whether this leaves residual standing water above the pipe. We need confirmation this achieves drawdown in 5 days or less. If not, tell us. Option 2: Remove approximately 2 additional feet of material beyond Option 1 for faster drawdown, replaced with the same clean rock and sand system, if needed to hit the 5-day target. We are leaning toward Option 1 on cost, but want the engineering to confirm it will actually dry out in time. Requirements Plans must be biddable and buildable by an excavation contractor. Pipe sizing, slope, invert elevations, aggregate envelope, filter sock or fabric, and cleanout locations. Clogging is the failure mode we most need designed against. Low maintenance is a hard requirement. Our board turns over regularly and has no ongoing technical continuity. Design should be consistent with MPCA Minnesota Stormwater Manual and Brooklyn Park City Code Chapter 153 standards. Engineer of record must be a Professional Engineer licensed in the State of Minnesota. We will provide the original 2001 stormwater management plans and calculations, MFRA record drawings, the 2019 AET site visit report, and City and watershed correspondence. In your bid, please include: relevant underdrain design experience, your Minnesota PE license number, your fixed fee and timeline, and whether your fee assumes we provide an existing conditions survey.
Project ID: 40617966
40 proposals
Active 6 hours ago
Location: Brooklyn Park, United States
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40 freelancers are bidding on average $5,657 USD for this job

Hello, I am interested in your stormwater drainage design project. I have experience designing residential stormwater systems, including both surface and subsurface drainage, with a focus on code compliance, effective water management, and constructible solutions. I can provide detailed drainage plans, calculations, and specifications that meet local regulations and support the permitting process. Please share the project location, site survey, grading information, and any available civil drawings so I can review the scope and provide a timeline. Thank you.
$7,500 USD in 7 days
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Hello, I’m David, a licensed Professional Engineer with experience in stormwater management and residential drainage system design. I have worked on projects involving surface and subsurface drainage solutions, ensuring proper water flow, erosion control, and compliance with applicable local standards and regulations. I can develop detailed drainage plans, calculations, and specifications using industry-standard design tools while coordinating effectively with project stakeholders. My approach focuses on creating practical, efficient, and code-compliant drainage systems tailored to each site’s requirements. I would be glad to discuss your project details and provide the engineering support needed for a successful residential development.
$5,000 USD in 7 days
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Hi, I'm a Senior Stormwater Design Engineer with extensive experience designing residential drainage systems for new developments and redevelopment projects. I understand that your priority is creating reliable surface and subsurface drainage while ensuring full compliance with local regulations. I'll evaluate site grading, runoff patterns, pipe sizing, inlet placement, and detention requirements to produce detailed construction-ready plans and specifications. My experience with Civil 3D, HydroCAD, and stormwater calculations ensures practical, cost-effective designs that perform efficiently. I'm confident I can deliver a compliant and dependable drainage solution.
$7,500 USD in 7 days
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Hello, I'd be glad to assist with your residential stormwater project. I have experience designing practical and code-compliant drainage systems that effectively manage both surface runoff and subsurface water movement. My approach begins with evaluating site conditions, grading, and drainage patterns before developing a solution that minimizes flooding, erosion, and long-term maintenance concerns. You'll receive detailed drainage plans, design specifications, and documentation prepared to meet local regulations. I believe good stormwater design protects both the property and future homeowners, and I'd be happy to share examples of similar residential drainage projects. I look forward to working with you. Thanks Bryan
$5,000 USD in 5 days
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Hello, no problem. I am a licensed civil engineer with extensive experience in residential stormwater drainage design, including surface and subsurface systems. I will design effective drainage solutions for your residential area, compliant with local regulations, including grading, swales, catch basins, pipes, and infiltration systems. I will provide detailed plans, specifications, and calculations. I am ready to begin as soon as you share the site survey and any local drainage criteria. Sincerely, Lorenzo
$5,000 USD in 7 days
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Hi, Your project is exactly the type of engineering work I enjoy. I'll develop a complete drainage design that integrates surface collection, subsurface drainage, and efficient stormwater management while ensuring compliance with local standards. Every design is prepared with constructability in mind, making it easier for contractors to execute accurately. I have worked on residential developments requiring drainage layouts, grading coordination, and permit-ready engineering documentation, and I can provide relevant project samples. I'd welcome the opportunity to discuss your site and project goals.
$7,000 USD in 4 days
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Hi, I'm a civil engineer with extensive experience in residential stormwater drainage design, including surface and subsurface systems. I will design effective drainage solutions, ensure compliance with local regulations, and provide detailed plans and specifications. I'm ready to review your site plan and project requirements. Best regards, Justin
$5,000 USD in 7 days
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Greetings, I can provide a complete stormwater drainage design package that includes: • Surface drainage layout • Subsurface drainage system design • Stormwater flow analysis • Drainage calculations • Detailed construction drawings • Technical specifications • Compliance with applicable local regulations I have experience supporting residential developments with practical drainage solutions that improve water management while meeting engineering and permitting requirements. I'd be happy to review your site information and recommend the most effective drainage strategy. Best regards Isabelle
$5,000 USD in 7 days
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Hi, I'm a Hydrology and Hydraulic Modeling Engineer with strong expertise in residential stormwater systems. Your project requires more than drainage layouts—it requires accurate runoff analysis and efficient hydraulic design. I'll perform watershed calculations, evaluate storm events, size drainage structures, and design both surface and underground systems that comply with local standards. My experience with HydroCAD, HEC-RAS, and Civil 3D enables me to produce technically sound plans and supporting calculations. I'm ready to deliver an efficient, permit ready design. Best Resgards!!!
$10,000 USD in 7 days
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Good day, Successful residential drainage design requires more than routing water away from structures—it demands a comprehensive understanding of grading, runoff behavior, soil conditions, and long-term system performance. I'll design an integrated surface and subsurface drainage solution that efficiently controls stormwater while meeting applicable local engineering standards. My deliverables will include detailed plans, technical specifications, and supporting documentation suitable for construction and permitting. I've contributed to residential infrastructure and land development projects where reliable drainage was a key component, and I'd be pleased to share relevant examples of my work. Best Regards Anderson
$5,000 USD in 3 days
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Hello, I'd be excited to support your residential stormwater engineering project. My design process focuses on developing reliable drainage systems that manage runoff efficiently while protecting homes, roadways, and landscaped areas from water-related issues. After reviewing the site conditions and project requirements, I'll prepare a coordinated drainage design incorporating both surface and subsurface systems, along with detailed plans, profiles, construction details, and engineering specifications. Throughout the project, I prioritize hydraulic performance, constructability, and regulatory compliance to help ensure a smooth approval process. I also coordinate closely with clients and project stakeholders to address site-specific challenges and optimize the final design. My experience includes residential drainage and stormwater management projects using industry-standard engineering software, and I'd be happy to provide examples of similar work. I look forward to discussing your project and developing a drainage solution that is efficient, practical, and built for long-term performance. Thank you, June
$5,000 USD in 4 days
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Hi, I'm a Site Infrastructure Design Engineer with extensive experience in residential drainage and utility coordination. I understand your goal is to create an efficient stormwater management system that integrates seamlessly with the site's infrastructure. I'll design surface drainage, underground pipe networks, inlets, and outlet structures while optimizing grading for effective runoff control. Using Civil 3D and hydraulic modeling software, I'll provide detailed engineering drawings and specifications that support construction and regulatory approvals. I can deliver a dependable solution on schedule.
$5,000 USD in 5 days
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Hi, I'm a Civil Infrastructure and Drainage Engineer with a strong background in residential land development projects. I understand the importance of designing drainage systems that remain effective during both routine rainfall and major storm events. I'll create optimized surface grading, underground drainage layouts, hydraulic calculations, and detailed engineering documentation using Civil 3D and drainage modeling software. My designs emphasize constructability, long term performance, and compliance with applicable standards. I look forward to helping bring your project to completion.
$5,000 USD in 7 days
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Hi, I'm a Senior Municipal Drainage Engineer with extensive experience designing stormwater infrastructure for residential developments. I understand that successful drainage design requires careful coordination between grading, collection systems, and local regulatory requirements. I'll prepare comprehensive surface and subsurface drainage plans, perform hydraulic analyses, and produce complete specifications suitable for permitting and construction. My focus is on creating efficient, maintainable systems that minimize flooding risks while meeting engineering standards. I'm ready to deliver a high-quality solution for your project.
$5,000 USD in 7 days
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Hello, I understand you need a reliable drainage design solution for a residential property where proper water management is critical. With my background in Civil Engineering, Site Design, and Residential Construction Documentation, I can help develop accurate drainage and grading plans tailored to your property conditions. I have experience analyzing site elevations, runoff flow, grading requirements, and creating clear drawings that contractors can follow during construction. I would be glad to discuss your property details and help create an effective drainage design solution. Looking forward to working with you!
$5,000 USD in 7 days
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Hi, Fixed Price: $5000(surface + subsurface systems, full plans, specs, and compliance documentation). Timeline: 12 business days for draft design; 18 days for final stamped set. Process: Site assessment and catchment analysis using Civil 3D and InfoDrainage for robust rainfall-runoff modeling and regulatory reporting . Design includes traditional pipe networks and sustainable practices (LID) where applicable to meet local standards . I handle coordination with reviewing authorities directly. Relevant experience: 8+ years in residential stormwater engineering; recent projects include a 14-lot subdivision with detention and a 6-acre mixed-use site requiring NPDES compliance. I provide clear plans, calculations, and stamped construction documents that streamline approval. Ready to start upon site data receipt and 30% deposit.
$5,000 USD in 7 days
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Hi, Lisaf ! Thank you for outlining your need for a stormwater engineer to design both surface and subsurface drainage systems for a residential area. I understand how crucial it is to create effective solutions that manage runoff, comply with local regulations, and provide lasting protection for properties. I have hands-on experience designing drainage systems for residential developments in the United States, with a strong focus on integrating both traditional and innovative stormwater management techniques. I’m well-versed in local standards and know how to take projects from concept to construction-ready documents. Here’s how I can help: - Review existing site data, project requirements, and any reports you have - Evaluate engineering and design approaches for optimal drainage performance - Prepare detailed plans, specifications, and calculations required for approvals - Coordinate with stakeholders and support you during permitting and review To get started, please share any site plans, surveys, photos, soil reports, or previous drainage information you have, along with any feedback from your local jurisdiction. Best regards, Morris
$5,000 USD in 7 days
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Hi there, Surface and subsurface drainage for a residential area needs more than just slopes and pipes, it needs a compliant, buildable stormwater strategy that prevents ponding, surcharge, and long-term site damage. I can start immediately. ✅Scope of work I’ve spent the last 4 years solving exactly this type of drainage problem for residential developments. I will assess your site grading, runoff paths, soil conditions, and outlet constraints, then design a coordinated surface and subsurface drainage system that meets local standards and performs reliably in the field. ✅Implementation I will develop drainage layouts, pipe sizing, inlet placement, catchment routing, and subsurface details, with clear calculations and coordination notes for stakeholders and permitting review. I’ll also prepare detailed plans and specifications so the contractor has a precise, constructible package. ✅Deliverables - Surface and subsurface drainage design - Compliance-focused calculations - Detailed plans and specifications - Review-ready documentation for approvals Best regards, Christopher
$5,000 USD in 2 days
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Hi there, Residential drainage failures usually start with incomplete surface grading or undersized subsurface conveyance. I’ve spent the last 4 years solving exactly this type of stormwater problem for residential developments, and I can design a compliant system that performs reliably in the field. Deliverables - Surface drainage layout with flow paths, inlets, and site grading coordination - Subsurface drainage design for pipes, trenches, underdrains, and discharge control - Stormwater calculations, local code compliance review, and detailed plans/specifications I will assess catchment areas, model runoff, verify pipe capacities, coordinate invert levels and slopes, and prepare construction-ready drawings that align with local standards and stakeholder requirements. Best regards, Bryan - Act as a licensed engineer.
$5,000 USD in 2 days
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Hello, I am a licensed Civil Engineer with extensive experience in residential stormwater management, drainage system design, and permit-ready civil engineering documentation. I can design comprehensive surface and subsurface drainage systems that effectively manage runoff, minimize erosion, and comply with all applicable local regulations and stormwater standards. My approach combines detailed hydraulic analysis, practical site grading solutions, and constructable designs to ensure long-term performance and efficient water management. Deliverables include drainage plans, grading and stormwater calculations, construction details, technical specifications, and editable CAD/PDF files ready for permitting and construction. I am confident my civil engineering expertise will provide a reliable, code-compliant drainage solution for your residential project, and I would be pleased to discuss your site conditions and share examples of similar work. Thank you.
$5,000 USD in 5 days
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