Stormwater Committee

Stormwater Committee - Jul 14 2026 Agenda Tuesday, July 14, 2026 at 5:30 PM City Hall, 5290 Grand Meadow Drive, Suite 1, Asbury, Iowa 52002 Page 1. Meeting Opening A. Call to Order B. Roll Call C. Citizen Input 2. New Business A. Minutes of the May 12, 2026 Meeting. 2 May12.pdf B. Mural Project. 3 Storm Drain Mural Contest Application Form.pdf Springreen & Asbury-2.pdf City Hall Driveway.pdf City Hall Digital Sign.pdf Asbury Park East-2.pdf C. Cost Share Program. 8 BMP Cost Estimate Summary.pdf D. MS-4 Permit. Permit Requirement Updates. 3. Any Other Business 4. Adjournment A. Adjourn Meeting Title VI Statement - The City of Asbury receives federal funding and may not discriminate against anyone on the basis of race, color, or national origin, according to Title VI of the Civil Rights Act of 1964. For more information or to obtain a Title VI Complaint form, call 563-556-7106. Page 1 of 15 Storm Water Utility Committee Minutes May 12, 2026 The meeting was called to order at 5:30 p.m. Present: Mark Schemmel, Bob Reisch, Jessica Anderschau, Adam Mueller and Samantha Fiegen, Steve Thompson and Kathy Bahl. Also present: Beth Bonz. moved to approve the minutes from the 2/10/26 Meeting. Seconded by . Motion carried. (all ayes) New Member: Jim Kane Water Quality Dashboard. Board discussed the Cost Share Program and Mural Project. moved to adjourn at p.m. Seconded by . Motion carried. Beth Bonz Page 2 of 15 Storm Drain Mural Project 2026 The City of Asbury is seeking artists to create designs for murals to be painted in public walkways alongside storm drains in an effort to help community members understand the connection between our homes and our waterways. The contest is open to artists of all skill levels, and applicants may be an individual or group. Multiple submissions are allowed. Applicants who agree to replicate their submissions onto public walkways will receive a $250 stipend. Designs must be received by the Clerk’s Office at City Hall, 5290 Grand Meadow Drive, Suite 1, Asbury, IA 52002 on or before end of day Tuesday, September 8, 2026. Selected designs will be decided by the Storm Water Utility Commission and artists will be notified within seven (7) days. Selected designs will align with Themes and be assessed based on Rubric. Storm drain murals must be painted no later than Saturday, October 18, 2026. Eligibility Applicant must reside within 10 miles of Asbury city limits Submission must be original and demonstrate strong artistic merit AI-generated submissions are ineligible Themes Water Quality: Clean Water Starts with You Stormwater Pollution Prevention: Only Rain Down the Drain Connected to the Mississippi: Keep It Clean, We’re All Downstream Rubric Total out of 50 points: Elements and Principles of Design - 10 points Creativity/Originality - 10 points Adherence to the Theme - 10 points Interpretation (unambiguous/clear) - 10 points Overall Impact and Appeal - 10 points Application Name: ____________________________________________________________ Phone Number: ___________________________ Address: __________________________________________________________________________________________________________ Select one: I will replicate this design onto the public walkway if my design is chosen. I would like the City of Asbury to arrange for an artist to replicate my design onto the public walkway if chosen. I understand this means forfeiting my right to the $250 stipend. Select one: I am aged 18 years or older. I am aged 17 years or younger. ____________________________________________________________________ _______________________________________ Signature of Applicant Date ____________________________________________________________________ _______________________________________ Signature of Parent or Legal Guardian if Applicant is under 18 Date Page 3 of 15 Storm Drain Mural Project 2026 Location Name: Springreen & Asbury Actual Dimensions: 91" W x 74" H Casey’s West Entrance Asbury Rd Page 4 of 15 Storm Drain Mural Project 2026 Location Name: City Hall Driveway Actual Dimensions: 48" W x 48" H City Hall Driveway Page 5 of 15 Storm Drain Mural Project 2026 Location Name: City Hall Digital Sign Actual Dimensions: 53" W x 60" H Library Asbury Rd Page 6 of 15 Storm Drain Mural Project 2026 Location Name: Asbury Park East Actual Dimensions: 144" W x 72" H Basketball Court Parking Lot Page 7 of 15 Cost Estimate – Stormwater BMPs Dubuque County Watersheds February 2026 1 Page 8 of 15 Soil Quality Restoration: Existing Lawn: $ 0.30 / sq ft New Lawn: $ 0.48 / sq ft Deep Tine Aeration: $ 0.10 – 0.13 / sq ft Compost Application: $ 0.12 – 0.15 / sq ft Overseeding: $ 0.06 – 0.08 / sq ft Straw Blanket/RECP: $ 0.20 / sq ft (new lawn only) Native Landscaping: Seeding: $ 0.30 / sq ft (includes seed & labor, rate may increase for projects below 1000 sq ft) Mowing to Monarchs: Plugs: $ 5.00 / sq ft (includes plants & labor) 2 Page 9 of 15 Rain Garden/Bioretention: Total Cost ($) = $ 3.80 × [sq ft impervious] + $ 0.44 × [sq ft pervious] – $ 372 Assumptions: - 0.10 ac: 2000 sq ft impervious 2356 sq ft pervious - 0.25 ac: 2400 sq ft impervious 8490 sq ft pervious - 0.50 ac: 2800 sq ft impervious 18980 sq ft pervious - Entire yard (pervious) and driveway/roof (impervious) contribute to runoa - No up gradient area contributing to runoa - No soil quality restoration has been performed - Silt loam: percolation rate ~ 0.25 in/hr - Existing yard slope 9:1 (11%) - Basin side slope 3:1 - 12” ponding depth, 12” freeboard - Amended soil: 75% sand, 15% topsoil, 10% compost - Amended soil and plant plugs cover entire ponding area Factors that would increase/decrease cost: - Site configuration/slope (impacts length of subdrain needed, quantity and complexity of excavation, area contributing to runoa) - DIY activities by resident (i.e. spreading amended soil, mulching, planting) - Soil quality restoration (reduces runoa coeaicient of pervious areas) 3 Page 10 of 15 Cost Data (includes materials, labor, O&P) unit unit price Amended Soil CY $ 60.00 Subbase (6" rototilled) SY $ 6.00 Excavation CY $ 18.00 Rough Grading CY $ 2.20 Fine Grading SY $ 0.25 Geotextile Fabric SY $ 2.25 Subdrain (4") LF $ 10.00 Subdrain Outlet EA $ 325.00 Subdrain Connections EA $ 20.00 Filter Aggregate (3/8") TON $ 52.00 Storage Aggregate (1") TON $ 42.00 Plant Plugs EA $ 5.00 Mulch CY $ 65.00 Mobilization EA $ 380.00 Equipment Rentals EA $ 1,056.00 Lot Size Total Cost 0.10 ac $ 8,275.00 0.25 ac $ 12,520.00 0.50 ac $ 18,700.00 4 Page 11 of 15 Empirical Cost Relationship: → Fit to formula: 𝑧 = 𝐴𝑥 + 𝐵𝑦 + 𝐶 z = Total Cost ($) x = Impervious Area (sq ft) y = Pervious Area (sq ft) A, B, C = Constants ($ / sq ft) → 3 equations, 3 unknowns: $ 8,275 = A [2000 sq ft] + B [2356 sq ft] + C $ 12,520 = A [2400 sq ft] + B [8490 sq ft] + C $ 18,700 = A [2800 sq ft] + B [18980 sq ft] + C → Result: A = $ 3.80 / sq ft impervious B = $ 0.44 / sq ft pervious C = - $ 372 Total Cost ($) = $ 3.80 × [sq ft impervious] + $ 0.44 × [sq ft pervious] – $ 372 5 Page 12 of 15 Appendix A: Basin material depths (cross section) 3” mulch 12” freeboard 6” amended soil 12” ponding depth 6” rototilled soil trench (depth depends on site, 4’ assumed) 2” filter aggregate 8” storage aggregate *exaggerated vertical scale 6 Page 13 of 15 Appendix B: Sample basin dimensions Plan View (Aerial) 0.10 ac Vstorage = 342 ft3 Vtotal = 965 ft3 Aponding = 490 ft2 Atotal = 831 ft2 0.25 ac Vstorage = 706 ft3 Vtotal = 1810 ft3 Aponding = 920 ft2 Atotal = 1388 ft2 0.50 ac Vstorage = 1324 ft3 Vtotal = 3178 ft3 Aponding = 1611 ft2 Atotal = 2219 ft2 *not to scale 7 Page 14 of 15 Appendix C: Sample basin cut and fill requirements Section View (Profile) 0.10 ac 0.25 ac 0.50 ac 8 Page 15 of 15