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6651 Galpin Rd_Drainage SubmittalLAKE & LAND SURVEYING, INC. Land Surveying and Civil Engineering 1200 CENTRE POINTE CURVE, SUITE 375, MENDOTA HEIGHTS, MN 55120 PHONE: 651-776-6211 / FAX: 651-776-6711 LAKEANDLAND@OUTLOOK.COM Page 1 of 2 March 9, 2026 Mr. Peter Grubish Timberline Homes 7900 International Drive Bloomington, MN 55425 Re: Stormwater Calculations – 6651 Galpin Blvd, Excelsior, MN - Job No. 2025.084 Dear Peter Grubish: The Riley Purgatory Bluff Creek stormwater design requirements include volume reduction, rate control and water quality. This is a summary of the design and calculations. See the Subcatchment exhibits, Site & Grading plan, and Hydrocad results for more detailed information. Volume Reduction 1.1 inches of volume reduction is required over the newly constructed impervious area. Based on conversations with yourself and verification with the USDA Soil Survey the site appears to consist of clay, which does not allow reliable infiltration. Volume reduction is not feasible here and a sand filter is proposed. Peak Discharge Requirement The proposed peak runoff rates for the 2yr, 10yr, 100yr, and 100yr-Snowmelt Events events must be less the existing peak runoff rates. Existing Peak Discharge Rate Proposed Discharge Rate 2 yr = 1.05 cfs 2 yr = 0.74 cfs 10yr = 2.41 cfs 10yr = 2.36 cfs 100yr = 4.86 cfs 100yr = 4.52 cfs 100yr 10 day Snowmelt = 4.88 cfs 100yr 10 day Snowmelt = 4.53 cfs Water Quality Requirements Water quality is provided by a treatment train consisting of a pond connected to a iron-enhanced sand filter. The pond and sand filter have outlets ensuring the sand filter does not see flows greater than 1.29 cfs from the 6” PVC inlet pipe . See the included MIDS Version 4 calculation. 1.1 inches x 5775 SF x 1/12 = 529 CF The required iron-enhanced filter area is 110 sf based on an infiltration rate of 1.2 in/hr. A 16 ft x 7 ft sand filter is provided (112 sf), to accommodate the water quality volume. LAKE & LAND SURVEYING, INC. Land Surveying and Civil Engineering 1200 CENTRE POINTE CURVE, SUITE 375, MENDOTA HEIGHTS, MN 55120 PHONE: 651-776-6211 / FAX: 651-776-6711 LAKEANDLAND@OUTLOOK.COM Page 2 of 2 STANDARD OF CARE Services performed by Lake & Land Surveying, Inc. for this project have been conducted in a manner consistent with the level of care and skill ordinarily exercised by members of the profession currently practicing in this area under similar budget and time constraints. No warranties, expressed or implied, are made. The material contained in this report is to be considered confidential. Distribution, sale or publication of this report or any part thereof without the expressed written consent of Lake & Land Surveying, Inc. is prohibited. Additional copies of this report and their associated reliance may be obtained by contacting us. ENGINEER’S CERTIFICATE I hereby certify that this plan, specification or report was prepared by me or under my direct supervision and that I am a duly registered Professional Engineer under the Laws of the State of Minnesota. LAKE & LAND SURVEYING, INC. James L. Grams, PE Minnesota Registration No. 49623 Encl: USDA Soil Maps KD2, HM Existing Impervious and Proposed Impervious Drawings, Hydrocad Calculations (Existing and Proposed), MIDS Calculations E Existing Site Routing Diagram for 6651 Galpin Blvd Excelsior, MN_Existing Prepared by Lake & Land Surveying Inc, Printed 3/9/2026 HydroCAD® 10.20-3h s/n 01303 © 2024 HydroCAD Software Solutions LLC Subcat Reach Pond Link 6651 Galpin Blvd Excelsior, MN_Existing Printed 3/9/2026Prepared by Lake & Land Surveying Inc Page 2HydroCAD® 10.20-3h s/n 01303 © 2024 HydroCAD Software Solutions LLC Rainfall Events Listing Event# Event Name Storm Type Curve Mode Duration (hours) B/B Depth (inches) AMC 1 2-Year MSE 24-hr 3 Default 24.00 1 2.47 2 2 100-Year MSE 24-hr 3 Default 24.00 1 7.18 2 3 1.1 Inch MSE 24-hr 3 Default 24.00 1 1.10 2 4 100-Year - 10 day snow melt MSE 24-hr 3 Default 24.00 1 7.20 2 5 10-Year MSE 24-hr 3 Default 24.00 1 4.20 2 MSE 24-hr 3 2-Year Rainfall=2.47"6651 Galpin Blvd Excelsior, MN_Existing Printed 3/9/2026Prepared by Lake & Land Surveying Inc Page 3HydroCAD® 10.20-3h s/n 01303 © 2024 HydroCAD Software Solutions LLC Summary for Subcatchment E: Existing Site [49] Hint: Tc<2dt may require smaller dt Runoff = 1.05 cfs @ 12.12 hrs, Volume= 0.045 af, Depth> 1.04" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs MSE 24-hr 3 2-Year Rainfall=2.47" Area (sf) CN Description 22,700 84 50-75% Grass cover, Fair, HSG D 22,700 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, Subcatchment E: Existing Site Runoff Hydrograph Time (hours) 201918171615141312111098765Flow (cfs)1 0 MSE 24-hr 3 2-Year Rainfall=2.47" Runoff Area=22,700 sf Runoff Volume=0.045 af Runoff Depth>1.04" Tc=5.0 min CN=84 1.05 cfs MSE 24-hr 3 100-Year Rainfall=7.18"6651 Galpin Blvd Excelsior, MN_Existing Printed 3/9/2026Prepared by Lake & Land Surveying Inc Page 4HydroCAD® 10.20-3h s/n 01303 © 2024 HydroCAD Software Solutions LLC Summary for Subcatchment E: Existing Site [49] Hint: Tc<2dt may require smaller dt Runoff = 4.86 cfs @ 12.11 hrs, Volume= 0.223 af, Depth> 5.13" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs MSE 24-hr 3 100-Year Rainfall=7.18" Area (sf) CN Description 22,700 84 50-75% Grass cover, Fair, HSG D 22,700 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, Subcatchment E: Existing Site Runoff Hydrograph Time (hours) 201918171615141312111098765Flow (cfs)5 4 3 2 1 0 MSE 24-hr 3 100-Year Rainfall=7.18" Runoff Area=22,700 sf Runoff Volume=0.223 af Runoff Depth>5.13" Tc=5.0 min CN=84 4.86 cfs MSE 24-hr 3 1.1 Inch Rainfall=1.10"6651 Galpin Blvd Excelsior, MN_Existing Printed 3/9/2026Prepared by Lake & Land Surveying Inc Page 5HydroCAD® 10.20-3h s/n 01303 © 2024 HydroCAD Software Solutions LLC Summary for Subcatchment E: Existing Site [49] Hint: Tc<2dt may require smaller dt Runoff = 0.17 cfs @ 12.14 hrs, Volume= 0.008 af, Depth> 0.18" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs MSE 24-hr 3 1.1 Inch Rainfall=1.10" Area (sf) CN Description 22,700 84 50-75% Grass cover, Fair, HSG D 22,700 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, Subcatchment E: Existing Site Runoff Hydrograph Time (hours) 201918171615141312111098765Flow (cfs)0.18 0.17 0.16 0.15 0.14 0.13 0.12 0.11 0.1 0.09 0.08 0.07 0.06 0.05 0.04 0.03 0.02 0.01 0 MSE 24-hr 3 1.1 Inch Rainfall=1.10" Runoff Area=22,700 sf Runoff Volume=0.008 af Runoff Depth>0.18" Tc=5.0 min CN=84 0.17 cfs MSE 24-hr 3 100-Year - 10 day snow melt Rainfall=7.20"6651 Galpin Blvd Excelsior, MN_Exi Printed 3/9/2026Prepared by Lake & Land Surveying Inc Page 6HydroCAD® 10.20-3h s/n 01303 © 2024 HydroCAD Software Solutions LLC Summary for Subcatchment E: Existing Site [49] Hint: Tc<2dt may require smaller dt Runoff = 4.88 cfs @ 12.11 hrs, Volume= 0.224 af, Depth> 5.15" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs MSE 24-hr 3 100-Year - 10 day snow melt Rainfall=7.20" Area (sf) CN Description 22,700 84 50-75% Grass cover, Fair, HSG D 22,700 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, Subcatchment E: Existing Site Runoff Hydrograph Time (hours) 201918171615141312111098765Flow (cfs)5 4 3 2 1 0 MSE 24-hr 3 100-Year - 10 day snow melt Rainfall=7.20" Runoff Area=22,700 sf Runoff Volume=0.224 af Runoff Depth>5.15" Tc=5.0 min CN=84 4.88 cfs MSE 24-hr 3 10-Year Rainfall=4.20"6651 Galpin Blvd Excelsior, MN_Existing Printed 3/9/2026Prepared by Lake & Land Surveying Inc Page 7HydroCAD® 10.20-3h s/n 01303 © 2024 HydroCAD Software Solutions LLC Summary for Subcatchment E: Existing Site [49] Hint: Tc<2dt may require smaller dt Runoff = 2.41 cfs @ 12.12 hrs, Volume= 0.106 af, Depth> 2.45" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs MSE 24-hr 3 10-Year Rainfall=4.20" Area (sf) CN Description 22,700 84 50-75% Grass cover, Fair, HSG D 22,700 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, Subcatchment E: Existing Site Runoff Hydrograph Time (hours) 201918171615141312111098765Flow (cfs)2 1 0 MSE 24-hr 3 10-Year Rainfall=4.20" Runoff Area=22,700 sf Runoff Volume=0.106 af Runoff Depth>2.45" Tc=5.0 min CN=84 2.41 cfs A Proposed Site P Pond (Outlets to Sand Filter/Overflow) Routing Diagram for 6651 Galpin Blvd Excelsior, MN_Proposed Prepared by Lake & Land Surveying Inc, Printed 3/9/2026 HydroCAD® 10.20-3h s/n 01303 © 2024 HydroCAD Software Solutions LLC Subcat Reach Pond Link 6651 Galpin Blvd Excelsior, MN_Proposed Printed 3/9/2026Prepared by Lake & Land Surveying Inc Page 2HydroCAD® 10.20-3h s/n 01303 © 2024 HydroCAD Software Solutions LLC Rainfall Events Listing Event# Event Name Storm Type Curve Mode Duration (hours) B/B Depth (inches) AMC 1 2-Year MSE 24-hr 3 Default 24.00 1 2.47 2 2 100-Year MSE 24-hr 3 Default 24.00 1 7.18 2 3 1.1 Inch MSE 24-hr 3 Default 24.00 1 1.10 2 4 100-Year - 10 day snow melt MSE 24-hr 3 Default 24.00 1 7.20 2 5 10-Year MSE 24-hr 3 Default 24.00 1 4.20 2 MSE 24-hr 3 2-Year Rainfall=2.47"6651 Galpin Blvd Excelsior, MN_Proposed Printed 3/9/2026Prepared by Lake & Land Surveying Inc Page 3HydroCAD® 10.20-3h s/n 01303 © 2024 HydroCAD Software Solutions LLC Summary for Subcatchment A: Proposed Site [49] Hint: Tc<2dt may require smaller dt Runoff = 1.30 cfs @ 12.12 hrs, Volume= 0.056 af, Depth> 1.30" Routed to Pond P : Pond (Outlets to Sand Filter/Overflow) Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs MSE 24-hr 3 2-Year Rainfall=2.47" Area (sf) CN Description 16,925 84 50-75% Grass cover, Fair, HSG D * 5,775 98 Roofs, Driveways 22,700 88 Weighted Average 16,925 74.56% Pervious Area 5,775 25.44% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, Subcatchment A: Proposed Site Runoff Hydrograph Time (hours) 201918171615141312111098765Flow (cfs)1 0 MSE 24-hr 3 2-Year Rainfall=2.47" Runoff Area=22,700 sf Runoff Volume=0.056 af Runoff Depth>1.30" Tc=5.0 min CN=88 1.30 cfs MSE 24-hr 3 2-Year Rainfall=2.47"6651 Galpin Blvd Excelsior, MN_Proposed Printed 3/9/2026Prepared by Lake & Land Surveying Inc Page 4HydroCAD® 10.20-3h s/n 01303 © 2024 HydroCAD Software Solutions LLC Summary for Pond P: Pond (Outlets to Sand Filter/Overflow) Inflow Area = 0.521 ac, 25.44% Impervious, Inflow Depth > 1.30" for 2-Year event Inflow = 1.30 cfs @ 12.12 hrs, Volume= 0.056 af Outflow = 0.74 cfs @ 12.21 hrs, Volume= 0.053 af, Atten= 43%, Lag= 5.3 min Primary = 0.74 cfs @ 12.21 hrs, Volume= 0.053 af Routing by Stor-Ind method, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Peak Elev= 999.97' @ 12.21 hrs Surf.Area= 435 sf Storage= 696 cf Plug-Flow detention time= 42.7 min calculated for 0.053 af (93% of inflow) Center-of-Mass det. time= 21.3 min ( 801.5 - 780.2 ) Volume Invert Avail.Storage Storage Description #1 999.00' 4,012 cf Custom Stage Data (Prismatic) Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 999.00 999 0 0 1,000.00 418 709 709 1,001.00 594 506 1,215 1,002.00 5,000 2,797 4,012 Device Routing Invert Outlet Devices #1 Primary 999.10'6.0" Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads #2 Primary 1,000.50'2.0' long x 2.0' breadth Broad-Crested Rectangular Weir Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60 1.80 2.00 2.50 3.00 3.50 Coef. (English) 2.54 2.61 2.61 2.60 2.66 2.70 2.77 2.89 2.88 2.85 3.07 3.20 3.32 Primary OutFlow Max=0.74 cfs @ 12.21 hrs HW=999.96' (Free Discharge) 1=Orifice/Grate (Orifice Controls 0.74 cfs @ 3.77 fps) 2=Broad-Crested Rectangular Weir ( Controls 0.00 cfs) MSE 24-hr 3 2-Year Rainfall=2.47"6651 Galpin Blvd Excelsior, MN_Proposed Printed 3/9/2026Prepared by Lake & Land Surveying Inc Page 5HydroCAD® 10.20-3h s/n 01303 © 2024 HydroCAD Software Solutions LLC Pond P: Pond (Outlets to Sand Filter/Overflow) Inflow Primary Hydrograph Time (hours) 201918171615141312111098765Flow (cfs)1 0 Inflow Area=0.521 ac Peak Elev=999.97' Storage=696 cf 1.30 cfs 0.74 cfs MSE 24-hr 3 2-Year Rainfall=2.47"6651 Galpin Blvd Excelsior, MN_Proposed Printed 3/9/2026Prepared by Lake & Land Surveying Inc Page 6HydroCAD® 10.20-3h s/n 01303 © 2024 HydroCAD Software Solutions LLC Stage-Area-Storage for Pond P: Pond (Outlets to Sand Filter/Overflow) Elevation (feet) Surface (sq-ft) Storage (cubic-feet) 999.00 999 0 999.05 970 49 999.10 941 97 999.15 912 143 999.20 883 188 999.25 854 232 999.30 825 274 999.35 796 314 999.40 767 353 999.45 738 391 999.50 709 427 999.55 679 462 999.60 650 495 999.65 621 527 999.70 592 557 999.75 563 586 999.80 534 613 999.85 505 639 999.90 476 664 999.95 447 687 1,000.00 418 709 1,000.05 427 730 1,000.10 436 751 1,000.15 444 773 1,000.20 453 796 1,000.25 462 819 1,000.30 471 842 1,000.35 480 866 1,000.40 488 890 1,000.45 497 914 1,000.50 506 940 1,000.55 515 965 1,000.60 524 991 1,000.65 532 1,017 1,000.70 541 1,044 1,000.75 550 1,072 1,000.80 559 1,099 1,000.85 568 1,127 1,000.90 576 1,156 1,000.95 585 1,185 1,001.00 594 1,215 1,001.05 814 1,250 1,001.10 1,035 1,296 1,001.15 1,255 1,353 1,001.20 1,475 1,421 1,001.25 1,696 1,501 1,001.30 1,916 1,591 1,001.35 2,136 1,692 1,001.40 2,356 1,805 1,001.45 2,577 1,928 1,001.50 2,797 2,062 1,001.55 3,017 2,208 Elevation (feet) Surface (sq-ft) Storage (cubic-feet) 1,001.60 3,238 2,364 1,001.65 3,458 2,531 1,001.70 3,678 2,710 1,001.75 3,899 2,899 1,001.80 4,119 3,100 1,001.85 4,339 3,311 1,001.90 4,559 3,534 1,001.95 4,780 3,767 1,002.00 5,000 4,012 MSE 24-hr 3 100-Year Rainfall=7.18"6651 Galpin Blvd Excelsior, MN_Proposed Printed 3/9/2026Prepared by Lake & Land Surveying Inc Page 7HydroCAD® 10.20-3h s/n 01303 © 2024 HydroCAD Software Solutions LLC Summary for Subcatchment A: Proposed Site [49] Hint: Tc<2dt may require smaller dt Runoff = 5.14 cfs @ 12.11 hrs, Volume= 0.242 af, Depth> 5.58" Routed to Pond P : Pond (Outlets to Sand Filter/Overflow) Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs MSE 24-hr 3 100-Year Rainfall=7.18" Area (sf) CN Description 16,925 84 50-75% Grass cover, Fair, HSG D * 5,775 98 Roofs, Driveways 22,700 88 Weighted Average 16,925 74.56% Pervious Area 5,775 25.44% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, Subcatchment A: Proposed Site Runoff Hydrograph Time (hours) 201918171615141312111098765Flow (cfs)5 4 3 2 1 0 MSE 24-hr 3 100-Year Rainfall=7.18" Runoff Area=22,700 sf Runoff Volume=0.242 af Runoff Depth>5.58" Tc=5.0 min CN=88 5.14 cfs MSE 24-hr 3 100-Year Rainfall=7.18"6651 Galpin Blvd Excelsior, MN_Proposed Printed 3/9/2026Prepared by Lake & Land Surveying Inc Page 8HydroCAD® 10.20-3h s/n 01303 © 2024 HydroCAD Software Solutions LLC Summary for Pond P: Pond (Outlets to Sand Filter/Overflow) Inflow Area = 0.521 ac, 25.44% Impervious, Inflow Depth > 5.58" for 100-Year event Inflow = 5.14 cfs @ 12.11 hrs, Volume= 0.242 af Outflow = 4.52 cfs @ 12.15 hrs, Volume= 0.238 af, Atten= 12%, Lag= 2.1 min Primary = 4.52 cfs @ 12.15 hrs, Volume= 0.238 af Routing by Stor-Ind method, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Peak Elev= 1,001.23' @ 12.15 hrs Surf.Area= 1,592 sf Storage= 1,462 cf Plug-Flow detention time= 21.6 min calculated for 0.238 af (98% of inflow) Center-of-Mass det. time= 13.9 min ( 769.2 - 755.3 ) Volume Invert Avail.Storage Storage Description #1 999.00' 4,012 cf Custom Stage Data (Prismatic) Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 999.00 999 0 0 1,000.00 418 709 709 1,001.00 594 506 1,215 1,002.00 5,000 2,797 4,012 Device Routing Invert Outlet Devices #1 Primary 999.10'6.0" Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads #2 Primary 1,000.50'2.0' long x 2.0' breadth Broad-Crested Rectangular Weir Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60 1.80 2.00 2.50 3.00 3.50 Coef. (English) 2.54 2.61 2.61 2.60 2.66 2.70 2.77 2.89 2.88 2.85 3.07 3.20 3.32 Primary OutFlow Max=4.51 cfs @ 12.15 hrs HW=1,001.22' (Free Discharge) 1=Orifice/Grate (Orifice Controls 1.29 cfs @ 6.59 fps) 2=Broad-Crested Rectangular Weir (Weir Controls 3.21 cfs @ 2.22 fps) MSE 24-hr 3 100-Year Rainfall=7.18"6651 Galpin Blvd Excelsior, MN_Proposed Printed 3/9/2026Prepared by Lake & Land Surveying Inc Page 9HydroCAD® 10.20-3h s/n 01303 © 2024 HydroCAD Software Solutions LLC Pond P: Pond (Outlets to Sand Filter/Overflow) Inflow Primary Hydrograph Time (hours) 201918171615141312111098765Flow (cfs)5 4 3 2 1 0 Inflow Area=0.521 ac Peak Elev=1,001.23' Storage=1,462 cf 5.14 cfs 4.52 cfs MSE 24-hr 3 100-Year Rainfall=7.18"6651 Galpin Blvd Excelsior, MN_Proposed Printed 3/9/2026Prepared by Lake & Land Surveying Inc Page 10HydroCAD® 10.20-3h s/n 01303 © 2024 HydroCAD Software Solutions LLC Stage-Area-Storage for Pond P: Pond (Outlets to Sand Filter/Overflow) Elevation (feet) Surface (sq-ft) Storage (cubic-feet) 999.00 999 0 999.05 970 49 999.10 941 97 999.15 912 143 999.20 883 188 999.25 854 232 999.30 825 274 999.35 796 314 999.40 767 353 999.45 738 391 999.50 709 427 999.55 679 462 999.60 650 495 999.65 621 527 999.70 592 557 999.75 563 586 999.80 534 613 999.85 505 639 999.90 476 664 999.95 447 687 1,000.00 418 709 1,000.05 427 730 1,000.10 436 751 1,000.15 444 773 1,000.20 453 796 1,000.25 462 819 1,000.30 471 842 1,000.35 480 866 1,000.40 488 890 1,000.45 497 914 1,000.50 506 940 1,000.55 515 965 1,000.60 524 991 1,000.65 532 1,017 1,000.70 541 1,044 1,000.75 550 1,072 1,000.80 559 1,099 1,000.85 568 1,127 1,000.90 576 1,156 1,000.95 585 1,185 1,001.00 594 1,215 1,001.05 814 1,250 1,001.10 1,035 1,296 1,001.15 1,255 1,353 1,001.20 1,475 1,421 1,001.25 1,696 1,501 1,001.30 1,916 1,591 1,001.35 2,136 1,692 1,001.40 2,356 1,805 1,001.45 2,577 1,928 1,001.50 2,797 2,062 1,001.55 3,017 2,208 Elevation (feet) Surface (sq-ft) Storage (cubic-feet) 1,001.60 3,238 2,364 1,001.65 3,458 2,531 1,001.70 3,678 2,710 1,001.75 3,899 2,899 1,001.80 4,119 3,100 1,001.85 4,339 3,311 1,001.90 4,559 3,534 1,001.95 4,780 3,767 1,002.00 5,000 4,012 MSE 24-hr 3 1.1 Inch Rainfall=1.10"6651 Galpin Blvd Excelsior, MN_Proposed Printed 3/9/2026Prepared by Lake & Land Surveying Inc Page 11HydroCAD® 10.20-3h s/n 01303 © 2024 HydroCAD Software Solutions LLC Summary for Subcatchment A: Proposed Site [49] Hint: Tc<2dt may require smaller dt Runoff = 0.29 cfs @ 12.13 hrs, Volume= 0.013 af, Depth> 0.29" Routed to Pond P : Pond (Outlets to Sand Filter/Overflow) Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs MSE 24-hr 3 1.1 Inch Rainfall=1.10" Area (sf) CN Description 16,925 84 50-75% Grass cover, Fair, HSG D * 5,775 98 Roofs, Driveways 22,700 88 Weighted Average 16,925 74.56% Pervious Area 5,775 25.44% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, Subcatchment A: Proposed Site Runoff Hydrograph Time (hours) 201918171615141312111098765Flow (cfs)0.32 0.3 0.28 0.26 0.24 0.22 0.2 0.18 0.16 0.14 0.12 0.1 0.08 0.06 0.04 0.02 0 MSE 24-hr 3 1.1 Inch Rainfall=1.10" Runoff Area=22,700 sf Runoff Volume=0.013 af Runoff Depth>0.29" Tc=5.0 min CN=88 0.29 cfs MSE 24-hr 3 1.1 Inch Rainfall=1.10"6651 Galpin Blvd Excelsior, MN_Proposed Printed 3/9/2026Prepared by Lake & Land Surveying Inc Page 12HydroCAD® 10.20-3h s/n 01303 © 2024 HydroCAD Software Solutions LLC Summary for Pond P: Pond (Outlets to Sand Filter/Overflow) Inflow Area = 0.521 ac, 25.44% Impervious, Inflow Depth > 0.29" for 1.1 Inch event Inflow = 0.29 cfs @ 12.13 hrs, Volume= 0.013 af Outflow = 0.06 cfs @ 12.47 hrs, Volume= 0.010 af, Atten= 79%, Lag= 20.3 min Primary = 0.06 cfs @ 12.47 hrs, Volume= 0.010 af Routing by Stor-Ind method, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Peak Elev= 999.25' @ 12.47 hrs Surf.Area= 856 sf Storage= 228 cf Plug-Flow detention time= 109.3 min calculated for 0.010 af (77% of inflow) Center-of-Mass det. time= 53.2 min ( 858.6 - 805.4 ) Volume Invert Avail.Storage Storage Description #1 999.00' 4,012 cf Custom Stage Data (Prismatic) Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 999.00 999 0 0 1,000.00 418 709 709 1,001.00 594 506 1,215 1,002.00 5,000 2,797 4,012 Device Routing Invert Outlet Devices #1 Primary 999.10'6.0" Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads #2 Primary 1,000.50'2.0' long x 2.0' breadth Broad-Crested Rectangular Weir Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60 1.80 2.00 2.50 3.00 3.50 Coef. (English) 2.54 2.61 2.61 2.60 2.66 2.70 2.77 2.89 2.88 2.85 3.07 3.20 3.32 Primary OutFlow Max=0.06 cfs @ 12.47 hrs HW=999.25' (Free Discharge) 1=Orifice/Grate (Orifice Controls 0.06 cfs @ 1.30 fps) 2=Broad-Crested Rectangular Weir ( Controls 0.00 cfs) MSE 24-hr 3 1.1 Inch Rainfall=1.10"6651 Galpin Blvd Excelsior, MN_Proposed Printed 3/9/2026Prepared by Lake & Land Surveying Inc Page 13HydroCAD® 10.20-3h s/n 01303 © 2024 HydroCAD Software Solutions LLC Pond P: Pond (Outlets to Sand Filter/Overflow) Inflow Primary Hydrograph Time (hours) 201918171615141312111098765Flow (cfs)0.32 0.3 0.28 0.26 0.24 0.22 0.2 0.18 0.16 0.14 0.12 0.1 0.08 0.06 0.04 0.02 0 Inflow Area=0.521 ac Peak Elev=999.25' Storage=228 cf 0.29 cfs 0.06 cfs MSE 24-hr 3 1.1 Inch Rainfall=1.10"6651 Galpin Blvd Excelsior, MN_Proposed Printed 3/9/2026Prepared by Lake & Land Surveying Inc Page 14HydroCAD® 10.20-3h s/n 01303 © 2024 HydroCAD Software Solutions LLC Stage-Area-Storage for Pond P: Pond (Outlets to Sand Filter/Overflow) Elevation (feet) Surface (sq-ft) Storage (cubic-feet) 999.00 999 0 999.05 970 49 999.10 941 97 999.15 912 143 999.20 883 188 999.25 854 232 999.30 825 274 999.35 796 314 999.40 767 353 999.45 738 391 999.50 709 427 999.55 679 462 999.60 650 495 999.65 621 527 999.70 592 557 999.75 563 586 999.80 534 613 999.85 505 639 999.90 476 664 999.95 447 687 1,000.00 418 709 1,000.05 427 730 1,000.10 436 751 1,000.15 444 773 1,000.20 453 796 1,000.25 462 819 1,000.30 471 842 1,000.35 480 866 1,000.40 488 890 1,000.45 497 914 1,000.50 506 940 1,000.55 515 965 1,000.60 524 991 1,000.65 532 1,017 1,000.70 541 1,044 1,000.75 550 1,072 1,000.80 559 1,099 1,000.85 568 1,127 1,000.90 576 1,156 1,000.95 585 1,185 1,001.00 594 1,215 1,001.05 814 1,250 1,001.10 1,035 1,296 1,001.15 1,255 1,353 1,001.20 1,475 1,421 1,001.25 1,696 1,501 1,001.30 1,916 1,591 1,001.35 2,136 1,692 1,001.40 2,356 1,805 1,001.45 2,577 1,928 1,001.50 2,797 2,062 1,001.55 3,017 2,208 Elevation (feet) Surface (sq-ft) Storage (cubic-feet) 1,001.60 3,238 2,364 1,001.65 3,458 2,531 1,001.70 3,678 2,710 1,001.75 3,899 2,899 1,001.80 4,119 3,100 1,001.85 4,339 3,311 1,001.90 4,559 3,534 1,001.95 4,780 3,767 1,002.00 5,000 4,012 MSE 24-hr 3 100-Year - 10 day snow melt Rainfall=7.20"6651 Galpin Blvd Excelsior, MN_Pro Printed 3/9/2026Prepared by Lake & Land Surveying Inc Page 15HydroCAD® 10.20-3h s/n 01303 © 2024 HydroCAD Software Solutions LLC Summary for Subcatchment A: Proposed Site [49] Hint: Tc<2dt may require smaller dt Runoff = 5.16 cfs @ 12.11 hrs, Volume= 0.243 af, Depth> 5.60" Routed to Pond P : Pond (Outlets to Sand Filter/Overflow) Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs MSE 24-hr 3 100-Year - 10 day snow melt Rainfall=7.20" Area (sf) CN Description 16,925 84 50-75% Grass cover, Fair, HSG D * 5,775 98 Roofs, Driveways 22,700 88 Weighted Average 16,925 74.56% Pervious Area 5,775 25.44% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, Subcatchment A: Proposed Site Runoff Hydrograph Time (hours) 201918171615141312111098765Flow (cfs)5 4 3 2 1 0 MSE 24-hr 3 100-Year - 10 day snow melt Rainfall=7.20" Runoff Area=22,700 sf Runoff Volume=0.243 af Runoff Depth>5.60" Tc=5.0 min CN=88 5.16 cfs MSE 24-hr 3 100-Year - 10 day snow melt Rainfall=7.20"6651 Galpin Blvd Excelsior, MN_Pro Printed 3/9/2026Prepared by Lake & Land Surveying Inc Page 16HydroCAD® 10.20-3h s/n 01303 © 2024 HydroCAD Software Solutions LLC Summary for Pond P: Pond (Outlets to Sand Filter/Overflow) Inflow Area = 0.521 ac, 25.44% Impervious, Inflow Depth > 5.60" for 100-Year - 10 day snow melt event Inflow = 5.16 cfs @ 12.11 hrs, Volume= 0.243 af Outflow = 4.53 cfs @ 12.15 hrs, Volume= 0.239 af, Atten= 12%, Lag= 2.1 min Primary = 4.53 cfs @ 12.15 hrs, Volume= 0.239 af Routing by Stor-Ind method, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Peak Elev= 1,001.23' @ 12.15 hrs Surf.Area= 1,599 sf Storage= 1,465 cf Plug-Flow detention time= 21.4 min calculated for 0.238 af (98% of inflow) Center-of-Mass det. time= 13.9 min ( 769.1 - 755.3 ) Volume Invert Avail.Storage Storage Description #1 999.00' 4,012 cf Custom Stage Data (Prismatic) Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 999.00 999 0 0 1,000.00 418 709 709 1,001.00 594 506 1,215 1,002.00 5,000 2,797 4,012 Device Routing Invert Outlet Devices #1 Primary 999.10'6.0" Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads #2 Primary 1,000.50'2.0' long x 2.0' breadth Broad-Crested Rectangular Weir Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60 1.80 2.00 2.50 3.00 3.50 Coef. (English) 2.54 2.61 2.61 2.60 2.66 2.70 2.77 2.89 2.88 2.85 3.07 3.20 3.32 Primary OutFlow Max=4.52 cfs @ 12.15 hrs HW=1,001.23' (Free Discharge) 1=Orifice/Grate (Orifice Controls 1.30 cfs @ 6.60 fps) 2=Broad-Crested Rectangular Weir (Weir Controls 3.22 cfs @ 2.22 fps) MSE 24-hr 3 100-Year - 10 day snow melt Rainfall=7.20"6651 Galpin Blvd Excelsior, MN_Pro Printed 3/9/2026Prepared by Lake & Land Surveying Inc Page 17HydroCAD® 10.20-3h s/n 01303 © 2024 HydroCAD Software Solutions LLC Pond P: Pond (Outlets to Sand Filter/Overflow) Inflow Primary Hydrograph Time (hours) 201918171615141312111098765Flow (cfs)5 4 3 2 1 0 Inflow Area=0.521 ac Peak Elev=1,001.23' Storage=1,465 cf 5.16 cfs 4.53 cfs MSE 24-hr 3 100-Year - 10 day snow melt Rainfall=7.20"6651 Galpin Blvd Excelsior, MN_Pro Printed 3/9/2026Prepared by Lake & Land Surveying Inc Page 18HydroCAD® 10.20-3h s/n 01303 © 2024 HydroCAD Software Solutions LLC Stage-Area-Storage for Pond P: Pond (Outlets to Sand Filter/Overflow) Elevation (feet) Surface (sq-ft) Storage (cubic-feet) 999.00 999 0 999.05 970 49 999.10 941 97 999.15 912 143 999.20 883 188 999.25 854 232 999.30 825 274 999.35 796 314 999.40 767 353 999.45 738 391 999.50 709 427 999.55 679 462 999.60 650 495 999.65 621 527 999.70 592 557 999.75 563 586 999.80 534 613 999.85 505 639 999.90 476 664 999.95 447 687 1,000.00 418 709 1,000.05 427 730 1,000.10 436 751 1,000.15 444 773 1,000.20 453 796 1,000.25 462 819 1,000.30 471 842 1,000.35 480 866 1,000.40 488 890 1,000.45 497 914 1,000.50 506 940 1,000.55 515 965 1,000.60 524 991 1,000.65 532 1,017 1,000.70 541 1,044 1,000.75 550 1,072 1,000.80 559 1,099 1,000.85 568 1,127 1,000.90 576 1,156 1,000.95 585 1,185 1,001.00 594 1,215 1,001.05 814 1,250 1,001.10 1,035 1,296 1,001.15 1,255 1,353 1,001.20 1,475 1,421 1,001.25 1,696 1,501 1,001.30 1,916 1,591 1,001.35 2,136 1,692 1,001.40 2,356 1,805 1,001.45 2,577 1,928 1,001.50 2,797 2,062 1,001.55 3,017 2,208 Elevation (feet) Surface (sq-ft) Storage (cubic-feet) 1,001.60 3,238 2,364 1,001.65 3,458 2,531 1,001.70 3,678 2,710 1,001.75 3,899 2,899 1,001.80 4,119 3,100 1,001.85 4,339 3,311 1,001.90 4,559 3,534 1,001.95 4,780 3,767 1,002.00 5,000 4,012 MSE 24-hr 3 10-Year Rainfall=4.20"6651 Galpin Blvd Excelsior, MN_Proposed Printed 3/9/2026Prepared by Lake & Land Surveying Inc Page 19HydroCAD® 10.20-3h s/n 01303 © 2024 HydroCAD Software Solutions LLC Summary for Subcatchment A: Proposed Site [49] Hint: Tc<2dt may require smaller dt Runoff = 2.71 cfs @ 12.11 hrs, Volume= 0.122 af, Depth> 2.81" Routed to Pond P : Pond (Outlets to Sand Filter/Overflow) Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs MSE 24-hr 3 10-Year Rainfall=4.20" Area (sf) CN Description 16,925 84 50-75% Grass cover, Fair, HSG D * 5,775 98 Roofs, Driveways 22,700 88 Weighted Average 16,925 74.56% Pervious Area 5,775 25.44% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, Subcatchment A: Proposed Site Runoff Hydrograph Time (hours) 201918171615141312111098765Flow (cfs)3 2 1 0 MSE 24-hr 3 10-Year Rainfall=4.20" Runoff Area=22,700 sf Runoff Volume=0.122 af Runoff Depth>2.81" Tc=5.0 min CN=88 2.71 cfs MSE 24-hr 3 10-Year Rainfall=4.20"6651 Galpin Blvd Excelsior, MN_Proposed Printed 3/9/2026Prepared by Lake & Land Surveying Inc Page 20HydroCAD® 10.20-3h s/n 01303 © 2024 HydroCAD Software Solutions LLC Summary for Pond P: Pond (Outlets to Sand Filter/Overflow) Inflow Area = 0.521 ac, 25.44% Impervious, Inflow Depth > 2.81" for 10-Year event Inflow = 2.71 cfs @ 12.11 hrs, Volume= 0.122 af Outflow = 2.36 cfs @ 12.16 hrs, Volume= 0.118 af, Atten= 13%, Lag= 2.9 min Primary = 2.36 cfs @ 12.16 hrs, Volume= 0.118 af Routing by Stor-Ind method, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Peak Elev= 1,000.88' @ 12.16 hrs Surf.Area= 573 sf Storage= 1,144 cf Plug-Flow detention time= 29.8 min calculated for 0.118 af (97% of inflow) Center-of-Mass det. time= 17.2 min ( 784.6 - 767.3 ) Volume Invert Avail.Storage Storage Description #1 999.00' 4,012 cf Custom Stage Data (Prismatic) Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 999.00 999 0 0 1,000.00 418 709 709 1,001.00 594 506 1,215 1,002.00 5,000 2,797 4,012 Device Routing Invert Outlet Devices #1 Primary 999.10'6.0" Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads #2 Primary 1,000.50'2.0' long x 2.0' breadth Broad-Crested Rectangular Weir Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60 1.80 2.00 2.50 3.00 3.50 Coef. (English) 2.54 2.61 2.61 2.60 2.66 2.70 2.77 2.89 2.88 2.85 3.07 3.20 3.32 Primary OutFlow Max=2.22 cfs @ 12.16 hrs HW=1,000.85' (Free Discharge) 1=Orifice/Grate (Orifice Controls 1.16 cfs @ 5.89 fps) 2=Broad-Crested Rectangular Weir (Weir Controls 1.07 cfs @ 1.53 fps) MSE 24-hr 3 10-Year Rainfall=4.20"6651 Galpin Blvd Excelsior, MN_Proposed Printed 3/9/2026Prepared by Lake & Land Surveying Inc Page 21HydroCAD® 10.20-3h s/n 01303 © 2024 HydroCAD Software Solutions LLC Pond P: Pond (Outlets to Sand Filter/Overflow) Inflow Primary Hydrograph Time (hours) 201918171615141312111098765Flow (cfs)3 2 1 0 Inflow Area=0.521 ac Peak Elev=1,000.88' Storage=1,144 cf 2.71 cfs 2.36 cfs MSE 24-hr 3 10-Year Rainfall=4.20"6651 Galpin Blvd Excelsior, MN_Proposed Printed 3/9/2026Prepared by Lake & Land Surveying Inc Page 22HydroCAD® 10.20-3h s/n 01303 © 2024 HydroCAD Software Solutions LLC Stage-Area-Storage for Pond P: Pond (Outlets to Sand Filter/Overflow) Elevation (feet) Surface (sq-ft) Storage (cubic-feet) 999.00 999 0 999.05 970 49 999.10 941 97 999.15 912 143 999.20 883 188 999.25 854 232 999.30 825 274 999.35 796 314 999.40 767 353 999.45 738 391 999.50 709 427 999.55 679 462 999.60 650 495 999.65 621 527 999.70 592 557 999.75 563 586 999.80 534 613 999.85 505 639 999.90 476 664 999.95 447 687 1,000.00 418 709 1,000.05 427 730 1,000.10 436 751 1,000.15 444 773 1,000.20 453 796 1,000.25 462 819 1,000.30 471 842 1,000.35 480 866 1,000.40 488 890 1,000.45 497 914 1,000.50 506 940 1,000.55 515 965 1,000.60 524 991 1,000.65 532 1,017 1,000.70 541 1,044 1,000.75 550 1,072 1,000.80 559 1,099 1,000.85 568 1,127 1,000.90 576 1,156 1,000.95 585 1,185 1,001.00 594 1,215 1,001.05 814 1,250 1,001.10 1,035 1,296 1,001.15 1,255 1,353 1,001.20 1,475 1,421 1,001.25 1,696 1,501 1,001.30 1,916 1,591 1,001.35 2,136 1,692 1,001.40 2,356 1,805 1,001.45 2,577 1,928 1,001.50 2,797 2,062 1,001.55 3,017 2,208 Elevation (feet) Surface (sq-ft) Storage (cubic-feet) 1,001.60 3,238 2,364 1,001.65 3,458 2,531 1,001.70 3,678 2,710 1,001.75 3,899 2,899 1,001.80 4,119 3,100 1,001.85 4,339 3,311 1,001.90 4,559 3,534 1,001.95 4,780 3,767 1,002.00 5,000 4,012 Project Information Calculator Version:Version 4: July 2020 Project Name:6651 Galpin Blvd Excelsior, MN User Name / Company Name:Lake & Land Surveying Date:3-09-26 Project Description:A single family home is proposed with underlying clay soils. Construction Permit?:Yes Site Information Retention Requirement (inches):1.1 Site's Zip Code:55331 Annual Rainfall (inches):29.6 Phosphorus EMC (mg/l):0.3 TSS EMC (mg/l):54.5 Total Site Area Land Cover A Soils (acres) B Soils (acres) C Soils (acres) D Soils (acres) Total (acres) Forest/Open Space -Undisturbed, protected forest/open space or reforested land 0 Managed Turf -disturbed, graded for yards or other turf to be mowed/managed 0.39 0.39 Impervious Area (acres)0.13 Total Area (acres)0.52 Site Areas Routed to BMPs Land Cover A Soils (acres) B Soils (acres) C Soils (acres) D Soils (acres) Total (acres) Forest/Open Space -Undisturbed, protected forest/open space or reforested land 0 Managed Turf -disturbed, graded for yards or other turf to be mowed/managed 0.39 0.39 Impervious Area (acres)0.13 Total Area (acres)0.52 Summary Information Performance Goal Requirement Performance goal volume retention requirement:519 ft3 Volume removed by BMPs towards performance goal:ft3 Percent volume removed towards performance goal % Annual Volume and Pollutant Load Reductions Post development annual runoff volume 0.4906 acre-ft Annual runoff volume removed by BMPs:0 acre-ft Percent annual runoff volume removed:0 % Post development annual particulate P load:0.2202 lbs Annual particulate P removed by BMPs:0.168 lbs Post development annual dissolved P load:0.18 lbs Annual dissolved P removed by BMPs:0.072 lbs Total P removed by BMPs 0.24 lbs Percent annual total phosphorus removed:60 % Post development annual TSS load:72.7 lbs Annual TSS removed by BMPs:65.5 lbs Percent annual TSS removed:90 % BMP Summary Performance Goal Summary BMP Name BMP Volume Capacity (ft3) Volume Recieved (ft3) Volume Retained (ft3) Volume Outflow (ft3) Percent Retained (%) 1 -Sand filter 0 519 0 519 0 1 -Constructed stormwater pond 0 519 0 519 0 Annual Volume Summary BMP Name Volume From Direct Watershed (acre-ft) Volume From Upstream BMPs (acre-ft) Volume Retained (acre-ft) Volume outflow (acre-ft) Percent Retained (%) 1 -Sand filter 0 0.4906 0 0.4906 0 1 -Constructed stormwater pond 0.4906 0 0 0.4906 0 Particulate Phosphorus Summary BMP Name Load From Direct Watershed (lbs) Load From Upstream BMPs (lbs) Load Retained (lbs) Outflow Load (lbs) Percent Retained (%) 1 -Sand filter 0 0.0881 0.0361 0.052 41 1 -Constructed stormwater pond 0.2202 0 0.1321 0.0881 60 Dissolved Phosphorus Summary BMP Name Load From Direct Watershed (lbs) Load From Upstream BMPs (lbs) Load Retained (lbs) Outflow Load (lbs) Percent Retained (%) 1 -Sand filter 0 0.1802 0.0721 0.1081 40 1 -Constructed stormwater pond 0.1802 0 0 0.1802 0 Total Phosphorus Summary BMP Name Load From Direct Watershed (lbs) Load From Upstream BMPs (lbs) Load Retained (lbs) Outflow Load (lbs) Percent Retained (%) 1 -Sand filter 0 0.2683 0.1082 0.1601 40 1 -Constructed stormwater pond 0.4004 0 0.1321 0.2683 30 TSS Summary BMP Name Load From Direct Watershed (lbs) Load From Upstream BMPs (lbs) Load Retained (lbs) Outflow Load (lbs) Percent Retained (%) 1 -Sand filter 0 29.09 21.82 7.27 75 1 -Constructed stormwater pond 72.73 0 43.64 29.09 60 BMP Schematic Soil Map—Carver County, Minnesota (6651 Galpin Blvd Excelsior, MN) Natural Resources Conservation Service Web Soil Survey National Cooperative Soil Survey 3/9/2026 Page 1 of 34970150497016049701704970180497019049702004970210497022049702304970240497015049701604970170497018049701904970200497021049702204970230454840454850454860454870454880454890454900454910454920454930454940454950454960454970454980 454840 454850 454860 454870 454880 454890 454900 454910 454920 454930 454940 454950 454960 454970 454980 44° 53' 2'' N 93° 34' 18'' W44° 53' 2'' N93° 34' 11'' W44° 52' 59'' N 93° 34' 18'' W44° 52' 59'' N 93° 34' 11'' WN Map projection: Web Mercator Corner coordinates: WGS84 Edge tics: UTM Zone 15N WGS84 0 30 60 120 180 Feet 0 10 20 40 60 Meters Map Scale: 1:703 if printed on A landscape (11" x 8.5") sheet. Soil Map may not be valid at this scale. MAP LEGEND MAP INFORMATION Area of Interest (AOI) Area of Interest (AOI) Soils Soil Map Unit Polygons Soil Map Unit Lines Soil Map Unit Points Special Point Features Blowout Borrow Pit Clay Spot Closed Depression Gravel Pit Gravelly Spot Landfill Lava Flow Marsh or swamp Mine or Quarry Miscellaneous Water Perennial Water Rock Outcrop Saline Spot Sandy Spot Severely Eroded Spot Sinkhole Slide or Slip Sodic Spot Spoil Area Stony Spot Very Stony Spot Wet Spot Other Special Line Features Water Features Streams and Canals Transportation Rails Interstate Highways US Routes Major Roads Local Roads Background Aerial Photography The soil surveys that comprise your AOI were mapped at 1:12,000. Warning: Soil Map may not be valid at this scale. Enlargement of maps beyond the scale of mapping can cause misunderstanding of the detail of mapping and accuracy of soil line placement. The maps do not show the small areas of contrasting soils that could have been shown at a more detailed scale. Please rely on the bar scale on each map sheet for map measurements. Source of Map: Natural Resources Conservation Service Web Soil Survey URL: Coordinate System: Web Mercator (EPSG:3857) Maps from the Web Soil Survey are based on the Web Mercator projection, which preserves direction and shape but distorts distance and area. A projection that preserves area, such as the Albers equal-area conic projection, should be used if more accurate calculations of distance or area are required. This product is generated from the USDA-NRCS certified data as of the version date(s) listed below. Soil Survey Area: Carver County, Minnesota Survey Area Data: Version 22, Sep 9, 2025 Soil map units are labeled (as space allows) for map scales 1:50,000 or larger. Date(s) aerial images were photographed: Mar 1, 2025—Jul 1, 2025 The orthophoto or other base map on which the soil lines were compiled and digitized probably differs from the background imagery displayed on these maps. As a result, some minor shifting of map unit boundaries may be evident. Soil Map—Carver County, Minnesota (6651 Galpin Blvd Excelsior, MN) Natural Resources Conservation Service Web Soil Survey National Cooperative Soil Survey 3/9/2026 Page 2 of 3 Map Unit Legend Map Unit Symbol Map Unit Name Acres in AOI Percent of AOI HM Hamel loam, 0 to 2 percent slopes 0.4 16.3% KC Lester-Kilkenny loams, 6 to 12 percent slopes 0.2 6.1% KD2 Lester-Kilkenny complex, 10 to 16 percent slopes, moderately eroded 1.3 53.0% KE2 Lester-Kilkenny complex, 16 to 22 percent slopes 0.6 24.6% Totals for Area of Interest 2.5 100.0% Soil Map—Carver County, Minnesota 6651 Galpin Blvd Excelsior, MN Natural Resources Conservation Service Web Soil Survey National Cooperative Soil Survey 3/9/2026 Page 3 of 3 Carver County, Minnesota KD2—Lester-Kilkenny complex, 10 to 16 percent slopes, moderately eroded Map Unit Setting National map unit symbol: 2vvgf Landscape: Till plains Elevation: 690 to 1,840 feet Mean annual precipitation: 24 to 37 inches Mean annual air temperature: 43 to 52 degrees F Frost-free period: 140 to 180 days Farmland classification: Not prime farmland Map Unit Composition Lester, moderately eroded, and similar soils: 50 percent Kilkenny, moderately eroded, and similar soils: 35 percent Minor components: 15 percent Estimates are based on observations, descriptions, and transects of the mapunit. Description of Lester, Moderately Eroded Setting Landscape: Till plains Landform: On leeward side of drainages hillslopes, Ground moraines Landform position (two-dimensional): Summit, shoulder, backslope Landform position (three-dimensional): Nose slope, rise Down-slope shape: Convex Across-slope shape: Convex, linear Parent material: Fine-loamy till Typical profile Ap - 0 to 6 inches: loam Bt - 6 to 38 inches: clay loam C - 38 to 79 inches: loam Properties and qualities Slope: 10 to 16 percent Depth to restrictive feature: More than 80 inches Drainage class: Well drained Capacity of the most limiting layer to transmit water (Ksat): Moderately high to high (0.20 to 2.00 in/hr) Depth to water table: About 55 to 71 inches Frequency of flooding: None Frequency of ponding: None Calcium carbonate, maximum content: 20 percent Maximum salinity: Nonsaline to very slightly saline (0.0 to 2.0 mmhos/cm) Available water supply, 0 to 60 inches: High (about 10.4 inches) Map Unit Description: Lester-Kilkenny complex, 10 to 16 percent slopes, moderately eroded--- Carver County, Minnesota 6651 Galpin Blvd Excelsior, MN Natural Resources Conservation Service Web Soil Survey National Cooperative Soil Survey 3/9/2026 Page 1 of 3 Interpretive groups Land capability classification (irrigated): None specified Land capability classification (nonirrigated): 4e Hydrologic Soil Group: C Ecological site: F103XY025MN - Loamy Upland Forests Forage suitability group: Sloping; Fine Texture (G103XS023MN) Other vegetative classification: Sloping; Fine Texture (G103XS023MN) Hydric soil rating: No Description of Kilkenny, Moderately Eroded Setting Landscape: Till plains Landform: Ground moraines, Lake plains Landform position (two-dimensional): Summit, shoulder, backslope Landform position (three-dimensional): Rise Down-slope shape: Convex Across-slope shape: Linear Parent material: Glaciolacustrine deposits over till Typical profile Ap - 0 to 7 inches: clay loam Bt - 7 to 47 inches: clay loam 2C - 47 to 79 inches: loam Properties and qualities Slope: 10 to 16 percent Depth to restrictive feature: More than 80 inches Drainage class: Well drained Capacity of the most limiting layer to transmit water (Ksat): Moderately low to high (0.06 to 2.00 in/hr) Depth to water table: About 55 to 71 inches Frequency of flooding: None Frequency of ponding: None Calcium carbonate, maximum content: 20 percent Maximum salinity: Nonsaline to very slightly saline (0.0 to 2.0 mmhos/cm) Available water supply, 0 to 60 inches: High (about 10.3 inches) Interpretive groups Land capability classification (irrigated): None specified Land capability classification (nonirrigated): 4e Hydrologic Soil Group: C Ecological site: F103XY026MN - Clayey Upland Forests Forage suitability group: Sloping; Fine Texture (G103XS023MN) Other vegetative classification: Sloping; Fine Texture (G103XS023MN) Hydric soil rating: No Map Unit Description: Lester-Kilkenny complex, 10 to 16 percent slopes, moderately eroded--- Carver County, Minnesota 6651 Galpin Blvd Excelsior, MN Natural Resources Conservation Service Web Soil Survey National Cooperative Soil Survey 3/9/2026 Page 2 of 3 Minor Components Terril Percent of map unit: 10 percent Landscape: Till plains Landform: Ground moraines Landform position (two-dimensional): Footslope, toeslope Landform position (three-dimensional): Dip Down-slope shape: Concave Across-slope shape: Linear Ecological site: F103XY029MN - Footslope/Drainageway Forests Other vegetative classification: Sloping Upland, Neutral (G103XS002MN) Hydric soil rating: No Hamel Percent of map unit: 5 percent Landscape: Till plains Landform: Ground moraines Landform position (three-dimensional): Dip Down-slope shape: Concave, linear Across-slope shape: Linear, concave Ecological site: F103XY030MN - Wet Footslope/Drainageway Forests Other vegetative classification: Level Swale, Neutral (G103XS001MN) Hydric soil rating: Yes Data Source Information Soil Survey Area: Carver County, Minnesota Survey Area Data: Version 22, Sep 9, 2025 Map Unit Description: Lester-Kilkenny complex, 10 to 16 percent slopes, moderately eroded--- Carver County, Minnesota 6651 Galpin Blvd Excelsior, MN Natural Resources Conservation Service Web Soil Survey National Cooperative Soil Survey 3/9/2026 Page 3 of 3 Carver County, Minnesota HM—Hamel loam, 0 to 2 percent slopes Map Unit Setting National map unit symbol: 2tsjw Landscape: Till plains Elevation: 690 to 1,840 feet Mean annual precipitation: 24 to 37 inches Mean annual air temperature: 43 to 52 degrees F Frost-free period: 140 to 180 days Farmland classification: Prime farmland if drained Map Unit Composition Hamel and similar soils: 85 percent Minor components: 15 percent Estimates are based on observations, descriptions, and transects of the mapunit. Description of Hamel Setting Landscape: Till plains Landform: Ground moraines Landform position (three-dimensional): Dip Down-slope shape: Concave, linear Across-slope shape: Linear, concave Parent material: Colluvium over till Typical profile Ap - 0 to 10 inches: loam A - 10 to 24 inches: loam Btg - 24 to 46 inches: clay loam Cg - 46 to 79 inches: clay loam Properties and qualities Slope: 0 to 2 percent Depth to restrictive feature: More than 80 inches Drainage class: Poorly drained Capacity of the most limiting layer to transmit water (Ksat): Moderately high to high (0.20 to 2.00 in/hr) Depth to water table: About 0 to 8 inches Frequency of flooding: None Frequency of ponding: None Calcium carbonate, maximum content: 20 percent Maximum salinity: Nonsaline to very slightly saline (0.0 to 2.0 mmhos/cm) Available water supply, 0 to 60 inches: High (about 10.9 inches) Interpretive groups Land capability classification (irrigated): None specified Land capability classification (nonirrigated): 2w Map Unit Description: Hamel loam, 0 to 2 percent slopes---Carver County, Minnesota 6651 Galpin Blvd Excelsior, MN Natural Resources Conservation Service Web Soil Survey National Cooperative Soil Survey 3/9/2026 Page 1 of 2 Hydrologic Soil Group: C/D Ecological site: F103XY030MN - Wet Footslope/Drainageway Forests Forage suitability group: Level Swale, Neutral (G103XS001MN) Other vegetative classification: Level Swale, Neutral (G103XS001MN) Hydric soil rating: Yes Minor Components Terril Percent of map unit: 10 percent Landscape: Till plains Landform: Ground moraines Landform position (two-dimensional): Footslope, toeslope Landform position (three-dimensional): Dip Down-slope shape: Concave Across-slope shape: Linear Ecological site: R103XY011MN - Footslope/Drainageway Prairies Other vegetative classification: Sloping Upland, Neutral (G103XS002MN) Hydric soil rating: No Glencoe Percent of map unit: 5 percent Landscape: Till plains Landform: Ground moraines Down-slope shape: Concave Across-slope shape: Concave Ecological site: R103XY015MN - Depressional Marsh Other vegetative classification: Ponded If Not Drained (G103XS013MN) Hydric soil rating: Yes Data Source Information Soil Survey Area: Carver County, Minnesota Survey Area Data: Version 22, Sep 9, 2025 Map Unit Description: Hamel loam, 0 to 2 percent slopes---Carver County, Minnesota 6651 Galpin Blvd Excelsior, MN Natural Resources Conservation Service Web Soil Survey National Cooperative Soil Survey 3/9/2026 Page 2 of 2