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Studies Applicant 1/3/2024
Stormwater Report Lifepoint Rehabilitation Hospital Prepared for: Esa Architects Prepared by: Mark Reyes, PE Project Engineer: Matt Keenan, PE December 2023 | KPFF Project #2300072 KPFF’S COMMITMENT TO SUSTAINABILITY As a member of the US Green Building Council, a sustaining member of Oregon Natural Step, and a member of the Sustainable Products Purchasers Coalition, KPFF is committed to the practice of sustainable design and the use of sustainable materials in our work. When hardcopy reports are provided by KPFF, they are prepared using recycled and recyclable materials, reflecting KPFF’s commitment to using sustainable practices and methods in all of our products. 1 Lifepoint Rehabilitation Hospital | KPFF Consulting Engineers STORMWATER REPORT Table of Contents Project Overview and Description ..................................................................................................................... 2 Overview ......................................................................................................................................................... 2 Site Constraints ............................................................................................................................................... 2 Methodology ...................................................................................................................................................... 2 Existing Conditions ......................................................................................................................................... 2 Proposed Conditions ....................................................................................................................................... 2 Stormwater Requirements ............................................................................................................................. 3 Proposed Stormwater System ........................................................................................................................ 3 Analysis ............................................................................................................................................................... 4 Water Quality Facilities .................................................................................................................................. 4 Engineering Conclusions .................................................................................................................................... 5 Tables and Figures TABLE 1: Pre-Development vs. Post-Development Runoff ................................................................................ 3 TABLE 2: 24-Hour Precipitation for Eugene, OR................................................................................................. 5 TABLE 3: Catchment and Facility Table .............................................................................................................. 5 Appendices Appendix 1 Site and Basin Maps Appendix 2 Stormwater Plans Appendix 3 Existing Runoff Calculations Appendix 4 Water Quality and Runoff Calculations Appendix 5 Soil Survey 2 Lifepoint Rehabilitation Hospital | KPFF Consulting Engineers STORMWATER REPORT Project Overview and Description Overview This Storm Drainage Report has been prepared regarding the proposed stormwater design at the northeast corner of the intersection of East Game Farm Road and Maple Island Road. The report will show that the site meets the stormwater regulations for the City of Springfield. It will discuss how the proposed stormwater facilities, pipes and structures will meet requirements for vegetated water quality treatment, flood control and flow control. Site Constraints The site is comprised of Type-C soils which have slow infiltration rates when thoroughly wet. A geotechnical investigation will be performed to determine infiltration rates. Infiltration will be discussed further under the Proposed Stormwater System section. Methodology Existing Conditions The site is bounded by Maple Island Road to the west, an undeveloped lot to the north, existing Peace Health Laboratories to the east and East Game Farm Road to the south. The site is currently undeveloped beyond an existing orchard. For the existing conditions and limits of study, see Exhibit 1 and 2 in Appendix 1. This site is within the City of Springfield’s North Gateway Stormwater Drainage Basin. The site is relatively flat with slopes between 0.5 percent to 2 percent except for the southwest corner. This corner has slopes of 5 percent up to 30 percent. The site slopes to the southwest corner and has approximately five feet of drop from the northeast to the southwest direction. Currently, there are no storm drainage or treatment systems onsite. According to the NRCS Web Soil Survey, the site consists of soil with a hydrologic soil group of C. See Appendix 5. Proposed Conditions The proposed conditions include a medical building, parking lots, drive aisles, pedestrian walkways, patient drop off, a healing garden and various landscaping open spaces. Of the 4.99-acre project site, 58 percent of surfaces will be impervious. The City of Springfield only requires treatment of pollution-generating impervious surfaces such as vehicle pavements, courtyard paving and other hardscapes in which pollutants gather. The stormwater runoff for impervious surfaces will be treated following the City of Springfield. The City of Springfield has determined there is sufficient capacity in the existing City stormwater system and detention will not be required. Each inlet and storm facility will be protected during construction via erosion control BMPs per a 1200-C Permit through the Department of Environmental Quality. Best management practices will be implemented to prevent sediment from entering the storm drainage system or runoff from leaving the site. 3 Lifepoint Rehabilitation Hospital | KPFF Consulting Engineers STORMWATER REPORT Stormwater Requirements Water Quality The City of Springfield stormwater quality design criteria outlined in Chapter 4 calls for a water quality design storm of 0.83 inches in a 24-hour rain event. Flow Control / Flood Control The City of Springfield has identified that the city storm system in this project location does not need flow control or detention. Source Control Source control is required for facilities that are highly likely to generate pollutants that are not addressed through the implementation of vegetated stormwater facilities. The trash area located on the project site will require source control measures. To meet these requirements, a heavy-duty sanitary drain located in the trash area will be trapped, auto primed, vented and connected to the sanitary sewer system. These drains will not be conveyed to the storm drainage system. Additionally, trash areas will be covered and hydraulically isolated from the stormwater system. Proposed Stormwater System The proposed development area is split into six separate basins. The impervious area on-site is divided between building roof areas, asphalt parking/drive aisles and site hardscape. See Appendix 1 for the Drainage Basin Areas. Vegetative facilities have been selected for water quality treatment. On-site new impervious surfaces will be treated through vegetated swales. Swales will have open storage at the surface of 6 inches deep with a minimum of 2 inches of freeboard. The swales will have a minimum of 24 inches of growing medium with landscaping planting for water quality management. Beneath the growing medium, there will be a 3-inch gravel lens over 9 inches of rock storage. The swales will treat the water quality storm event and infiltrate as much treated run-off as possible. An overflow will collect larger storm events to be conveyed to the City of Springfield public stormwater system. TABLE 1: Pre-Development vs. Post-Development Runoff WQ Storm Overflow 2-Year Storm Overflow 5-Year Storm Overflow 10-Year Storm Overflow Development CFS CF CFS CF CFS CF CFS CF Existing Conditions 0.01 302 1.43 23,046 1.94 29,748 2.50 36,790 Proposed Conditions 0.20 2,564 3.04 31,680 3.71 30,444 4.39 37,399 25-Year Storm Overflow 100-Year Storm Overflow Development CFS CF CFS CF Existing Conditions 3.09 44,101 3.59 50,108 Proposed Conditions 5.04 44,490 5.57 50,218 4 Lifepoint Rehabilitation Hospital | KPFF Consulting Engineers STORMWATER REPORT Water Quality Facilities Basin 1 encompasses the drive aisle and hardscape north of the building. Runoff will sheet flow to a swale for treatment and infiltration. After treatment, storm runoff will either be infiltrated into groundwater or for larger storm events be conveyed to the city public storm system. Basin 2 is the portion of the drive aisle and hardscape east of the building. Runoff will sheet flow to a swale for treatment and infiltration. Treated storm runoff will be infiltrated. Runoff from larger storm events will be conveyed to the city public storm system. Basins 3 is a small portion of the drive aisle and parking located in the southeast corner of the site. Runoff will sheet flow to a swale for treatment and infiltration. Treated storm runoff will be infiltrated. Runoff from larger storm events will be conveyed to the city public storm system. Basin 4 is a large portion of parking, drive aisle, and patient drop-off. Runoff will sheet flow to a swale for treatment and infiltration. Treated storm runoff will be infiltrated. Runoff from larger storm events will be conveyed to the city public storm system. Basin 5 is the portion of drive aisle and parking west of the building. Runoff will sheet flow to a swale for treatment and infiltration. Treated storm runoff will be infiltrated. Runoff from larger storm events will be conveyed to the city public storm system. Basin 6 encompasses the building and pedestrian hardscape around the building. Runoff from the building will be collected via downspouts and conveyed to the on-site storm system and then to the city system. Runoff from the pedestrian hardscape will be collected via area drains and conveyed to the on-site storm system and then to the city system. Analysis Water Quality Facilities The runoff for the impervious areas has been calculated and the planters and the rain garden have been sized to meet or exceed the City of Springfield requirements. The calculations determine run-off using the Santa Barbara Urban Hydrograph (SBUH) Method and NRCS 24-Hour Type 1A Hyetograph as outlined in Chapter 4 of the Engineering Design Standards and Procedures Manual. For analysis purposes, the following information was used as input data for the numerical model: • Impervious Area (A) • Curve Number (CN) • Time of Concentration (Tc) • Total Precipitation (i) Precipitation data for the City of Springfield design storms are shown in Table 2 on the next page. 5 Lifepoint Rehabilitation Hospital | KPFF Consulting Engineers STORMWATER REPORT TABLE 2: 24-Hour Precipitation for Springfield, OR (NOAA Atlas 2, Volume X) The property area is summarized below (see Appendix 1 for the Basin Map). TABLE 3: Catchment and Facility Table (See Appendix 1) Catchment Source Impervious Area Pervious Area Total Area Treatment Facility Color (SF) (Acres) (SF) (Acres) (SF) (Acres) BASIN 1 Drive Aisle, Sidewalk 16,325 0.37 23,350 0.54 39,675 0.91 Swale-1 BASIN 2 Drive Aisle, Sidewalk 9,058 0.21 12,104 0.28 21,162 0.49 Swale-2 BASIN 3 Parking, Drive Aisle, Sidewalk 8,054 0.18 7.541 0.17 15,595 0.36 Swale-3 Basin 4 Parking, Drive Aisle, Sidewalk 29,760 0.68 12,294 0.28 42,054 0.97 Swale-4 Basin 5 Parking, Drive Aisle, Sidewalk 15,232 0.35 11,730 0.27 26,962 0.62 Swale-5 Basin 6 Building, Sidewalk 47,611 1.09 23,839 0.55 71,450 1.64 N/A Engineering Conclusions Based on the requirements of the Stormwater Management Manual, the options presented in this report should be evaluated once the site development has been determined and final stormwater systems designed. The facilities and conveyance components have enough capacity to handle the required storm events. Once the site layout is determined, final recommendations can be provided to ensure that the system will be approved. Storm Event Inches WQ 0.83 2-Year 3.3 5-Year 3.8 10-Year 4.3 25-Year 4.8 100-Year 5.2 Lifepoint Rehabilitation Hospital | KPFF Consulting Engineers STORMWATER REPORT Appendix 1 Site and Basin Maps Lifepoint Rehabilitation Hospital | KPFF Consulting Engineers STORMWATER REPORT Appendix 2 Stormwater Plans UGE UGE UGE UGE UGE UGE UGE UGE UGE UGE UGE UGE UGE UGE UGE UGE UGE UGE UGE UGE UGE UGE UGE UGE UGE UGE UGE UGE UGE UGE UGEWLWLWLWLWLWLWL WLSDSD SDSDSDSDSDSDSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSD SD SD SDSSFOPFOPFOPFOP FOPFOPFOPFOPFOPFOPFOPFOPFOPFOPFOPFOPFOPFOPFOPUGEUGEUGEUGEUGEUGEUGEUGEUGEUGEUGEUGEUGEUGEUGEUGEUGEUGEUGEWL WL WL WL WL WL WL WL WL WL WL WL WL WL WL WLGASGASGASGASGASGAS GASGASGASGASGASGASGASGASGASGASGASGASGASWLWLWLWLWLWLSD SD SDSDUGE UGE UGE UGE UGE UGE UGE UGEDDD DDDDDDDDEEEEDYH ICVSSSSSTFOFOWVWVWVWVWVWVWVWVVEAST GAME FARM RDDEADMOND FERRY RDMAPLE ISLAND RD GAME FARM RD260.82'60" INV 425.64=60" inv = 425.9012" inv = 427.9012" inv = 428.02W WM-3''46 LF - 4"W59 LF - 6"FP143 LF - 6"FP143 LF - 4"W75 LF - 10"SD63 LF - 12"SD38 LF - 8"SD100 LF - 10"SD57 LF - 6"FHFH FH-185 LF - 8"SD44 LF - 8"SD 22 LF - 8"SD73 LF - 8"SD42 LF - 6"SD100 LF - 10"SD54 LF - 10"SD37 LF - 6"SD 5 7 L F - 8 " S D 99 LF - 8"S 24 LF - 8"S23 LF - 8"S 46 LF - 6"SS MH-183 LF - 8"S 100 LF - 8"S 100 LF - 8"S 29 LF - 6"S8 LF - 6"FP5 LF - 6"FPS CO-1S CO-2S S CO-3S CO-4S CO-517 LF - 8"SD96 LF - 8"SD 213DCDARPBAFPWVIBVIBVIBVIBVIBIE 12"=428.004IE 8"=422.125!!FDC!!!!!!!!FF=437.15S STUB-2IE 6" OUT=424.78 (E)S STUB-1IE 6" OUT=427.11 (E)NOTEDESCRIPTIONDETAILREF.1TAP TO EXISTING WATER MAIN FOR DOMESTIC WATER.COORDINATE CONNECTION TO EXISTING MAIN WITH SUB.SUB TO PERFORM TAP AND INSTALL METER.CONTRACTOR TO COORDINATE SCHEDULE AND EXACTLOCATION IN FIELD. CONTRACTOR TO POTHOLE PRIORTO CONSTRUCTION.2TAP TO EXISTING WATER MAIN FOR FIRE PROTECTIONLINE. COORDINATE CONNECTION TO EXISTING MAINWITH SUB. SUB TO PERFORM TAP. CONTRACTOR TOCOORDINATE SCHEDULE AND EXACT LOCATION IN FIELD.CONTRACTOR TO POTHOLE PRIOR TO CONSTRUCTION.3TAP TO EXISTING WATER MAIN FOR FIRE HYDRANTCONNECTION. COORDINATE CONNECTION TO EXISTINGMAIN WITH SUB. SUB TO PERFORM TAP. CONTRACTORTO COORDINATE SCHEDULE AND EXACT LOCATION INFIELD. CONTRACTOR TO POTHOLE PRIOR TOCONSTRUCTION.4CONNECT TO EXISTING STORM STRUCTURE. FIELDVERIFY PIPE SIZE, INVERT ELEVATION AND LOCATION.5CONNECT TO EXISTING WASTE WATER PUMP. FIELDVERIFY INVERT STRUCTURE SIZE ELEVATION ANDLOCATION.DCDADOUBLE CHECK DETECTOR ASSEMBLY.FDCFIRE DEPARTMENT CONNECTION.FHFIRE HYDRANT.FPCONNECT TO FIRE PROTECTION SYSTEM. SIZE ASNOTED. SEE PLUMBING PLANS FOR CONTINUATION.RPBAREDUCE PRESSURE BACKWATER ASSEMBLY.VIBVEGETATED INFILTRATION BASIN.WCONNECT TO COLD WATER SYSTEM. SEE PLUMBINGPLANS FOR CONTINUATION. SIZE AS NOTED.WM3" WATER METER. CONTRACTOR TO COORDINATE WITHINSTALLATION WITH SUB.!!UTILITY CROSSING. PROVIDE 12" MIN. CLEARANCE, U.N.O.PIPE LABELXXLF - XX" XXUTILITY SIZEUTILITY LENGTHUTILITY TYPES=X.XX%XX XX-XXN=XXXX.XXE=XXXX.XXRIM=IE IN = XX.XIE OUT = XX.XSTRUCTURE TYPE CALLOUTUTILITY TYPE (SD=STORM DRAINAGE, S=SANITARY SEWER,W=WATER, FP=FIRE PROTECTION)ID NUMBER (WHERE APPLICABLE)STRUCTURE INFO (WHERE APPLICABLE)LOCATION (WHERE APPLICABLE)STRUCTURE LABELSLOPE (WHERE APPLICABLE)XUTILITY KEY NOTESUTILITY LABEL LEGENDSHEET LEGENDFPFHSSDWFIRE PROTECTION LINEFIRE HYDRANT LINESANITARY SEWER LINESTORM WATER LINEDOMESTIC WATER LINEP R E L IM I N A R Y NO T FO R CO N S T R U C T IO N800 Willamette Street, Suite 400Eugene, OR 97401O: 541.684.4902F: 541.684.4909www.kpff.com0'SCALE 1" = 30' - 0"15'30'60'NTHE SATRE GROUP 375 West 4th, Suite 201, Eugene OR 97401 Phone: 541.686.4540 Fax: 541.686.4577 www.satregroup.com DescriptionPhase Drawn By Checked Date Project Number THE SATRE GROUP, LAND USE PLANNERS, LANDSCAPE ARCHITECTS AND ENVIRONMENTAL SPECIALISTS, EXPRESSLY RESERVE ITS COMMON LAW COPYRIGHT AND OTHER PROPERTY RIGHTS IN THESE PLANS. THESE PLANS ARE NOT TO BE REPRODUCED, CHANGED, OR COPIED IN ANY FORM OR MANNER WHATSOEVER, NOR ARE THEY TO BE ASSIGNED TO A THIRD PARTY WITHOUT FIRST OBTAINING THE WRITTEN PERMISSION AND CONSENT OF THE SATRE GROUP. IN THE EVENT OF UNAUTHORIZED REUSE OF THESE PLANS BY A THIRD PARTY, THE THIRD PARTY SHALL HOLD THE SATRE GROUP HARMLESS.RevisionsDate#© 2023, THE SATRE GROUP LIFEPOINT REHABILITATION HOSPITAL xx GAME FARM ROAD SPRINGFIELD, OREGON 2300072 C2.012/15.2023 SITE REVIEW File: O:\c\p\2023\2300072-PH-Rehab\CAD\PLOT\SD\2300072-03UT.dwg TAB:C2.0Plotted: 12/11/23 at 5:11pm By: MReyes UTILITY PLANMR-FU MK Lifepoint Rehabilitation Hospital | KPFF Consulting Engineers STORMWATER REPORT Appendix 3 Existing Runoff Calculations SBUH Calculation Worksheet for City of Springfield Storm Events Project Name: Lifepoint Rehab Date: 10/24/2023 Designer: MAR Basin: Ex. 1 User-Supplied Data Pervious Area Impervious Area Pervious Area, SF 215,427 Pervious Area, Acres 4.95 0.00 Pervious Area Curve Number, CNperv 77 98 Time of Concentration, Tc, minutes 5 Note: minimum Tc is five minutes City of Springfield 24-Hour Rainfall Depths (NRCS Type 1A distribution) Recurrence Interval WQ 2 5 10 25 50 100 Inches 0.83 3.3 3.8 4.3 4.8 0 5.2 Calculated Data Total Project Area, Acres 4.95 Total Project Area, Square Feet 215,427 Recurrence Interval WQ 2 5 10 25 50 100 Peak Flow Rate, Qpeak, cfs 0.01 1.43 1.94 2.50 3.09 0.00 3.59 Total Runoff Volume, V, cubic feet 302 23,046 29,748 36,790 44,101 0 50,108 Time to Peak Runoff, hours 24.00 8.00 8.00 7.83 7.83 0.00 7.83 Runoff Hydrograph Impervious Area, SF Impervious Area, Acres Impervious Area Curve Number, CNimp 0.00 0.50 1.00 1.50 2.00 2.50 3.00 3.50 4.00 0 500 1000 1500 2000 2500Runoff, cfsTime, minutes WQ 2-Year 5-Year 10-Year 25-Year 50-Year 100-Year 800 Willamette Street, Suite 400 Eugene, OR 97401 541.684.4902 kpff.com Lifepoint Rehabilitation Hospital | KPFF Consulting Engineers STORMWATER REPORT Appendix 4 Water Quality and Runoff Calculations SBUH Calculation Worksheet for City of Springfield Storm Events Project Name: Lifepoint Rehab Date: 12/11/2023 Designer: MAR Basin: 1 User-Supplied Data Pervious Area Impervious Area Pervious Area, SF 23,350 16,325 Pervious Area, Acres 0.54 0.37 Pervious Area Curve Number, CNperv 80 98 Time of Concentration, Tc, minutes 5 Note: minimum Tc is five minutes City of Springfield 24-Hour Rainfall Depths (NRCS Type 1A distribution) Recurrence Interval WQ 2-Yr 5-Yr 10-Yr 25-Yr 50-Yr 100-Yr Inches 0.83 3.3 3.8 4.3 4.8 5.2 Calculated Data Total Project Area, Acres 0.91 Total Project Area, Square Feet 39,675 Recurrence Interval WQ 2-Yr 5-Yr 10-Yr 25-Yr 50-Yr 100-Yr Peak Flow Rate, Qpeak, cfs 0.07 0.51 0.63 0.74 0.86 0.00 0.96 Total Runoff Volume, V, cubic feet 928 7,051 8,504 9,989 11,499 0 12,721 Time to Peak Runoff, hours 7.83 7.83 7.83 7.83 7.83 0.00 7.83 Runoff Hydrograph Impervious Area, SF Impervious Area, Acres Impervious Area Curve Number, CNimp 0.00 0.20 0.40 0.60 0.80 1.00 1.20 0 500 1000 1500 2000 2500Runoff, cfsTime, minutes WQ 2-Year 5-Year 10-Year 25-Year 50-Year 100-Year 800 Willamette Street, Suite 400 Eugene, OR 97401 541.684.4902 kpff.com Springfield Stormwater Facility Calculator Project Name: Lifepoint Rehab Basin: 1 Instructions:Date: 12/11/2023 1. Choose Facility Type 2. Choose shape 3. Complete information in highlighted cells Facility Swale Swale Type Vegetated Shape Rectangular Below-Grade See Swale Worksheet 40 sf See Swale Worksheet 40 sf 5 ft 12 in 4 to 1 Void Space:0.40 .3 to .4 6 in (typ.) 18 in Tested infiltration rate 2.00 in/hr Infiltration Safety Factor 2.00 Surface Storage Capacity 402 cf Rock Storage Capacity 293 cf Infiltration Area 973 sf Design Infiltration Rate 1.00 in/hr GM Infiltration Rate 2.5 in/hr Infiltration Capacity 0.023 cfs Infiltration Capacity (avg)0.056 cfs Results SURFACE CAPACITY Recurrance Interval Peak Flow (cfs) Volume (cf) Meets Infiltration? WQ 0.0000 0 Yes 2-Yr 0.4550 4,484 5-Yr 0.6018 5,951 10-Yr 0.7186 7,395 25-Yr 0.8376 8,896 50-Yr 0.0000 0 100-Yr 0.9340 10,091 100% 3% 0% 100% Rock Capacity 20% 100% 100% 100% Rock w/ Perf WATER QUALITY EVENT PASS ROCK CAPACITY 20% Swale Worksheet Project Name: Lifepoint Rehab Basin: 1 Instructions:Date: 12/11/2023 1. Complete information in highlighted cells (downstream depth = top of check dam or overflow) 2. Click ''calculate'' at the end of the facility segment line 1 12 0.01 6 6 3 3 6 12 40 96 29 0.9 0.096 2.08 2 12 0.01 6 6 3 3 6 12 40 96 29 0.9 0.096 2.08 3 12 0.01 6 6 3 3 6 12 40 96 29 0.9 0.096 2.08 4 12 0.01 6 6 3 3 6 12 40 96 29 0.9 0.096 2.08 5 12 0.01 6 6 3 3 6 12 40 96 29 0.9 0.096 2.08 6 12 0.01 6 6 3 3 6 12 40 96 29 0.9 0.096 2.08 7 12 0.01 6 6 3 3 6 12 40 96 29 0.9 0.096 2.08 8 12 0.01 6 6 3 3 6 12 40 96 29 0.9 0.096 2.08 9 12 0.01 6 6 3 3 6 12 40 96 29 0.9 0.096 2.08 10 14 0.01 6 6 3 3 6 12 45 111 34 0.9 0.096 2.43 11 0 0 0 12 0 0 0 13 0 0 0 14 0 0 0 15 0 0 0 16 0 0 0 17 0 0 0 18 0 0 0 19 0 0 0 20 0 0 0 21.14 Max 0.9 0.096 Total Residence Time: 3. If any cell turns red, it does not meet the city's requirements. If facility segment identifier turns red, consider shortening length between check dams or increasing the depth because the segment's capacity is not being fully utilized Left Side Slope (X:1) Facil- ity Seg- ment (ft) Length (ft) WQ Velo- city (ft/s) Down- stream Depth (in) Right Side Slope (X:1) Slope (ft/ft) Resi- dence Time (m) Storage Capa- city (cf) Infiltra- tion Area (sf) Rock Depth (in) Rock Width (ft) Bottom Width (ft) WQ Flow Depth (in) Rock Capa- city (cf) Project Name: Lifepoint Rehab Basin: 1 Date: 12/11/2023Water Quality Event Surface Facility Modeling Water Quality Event Below Grade Modeling 0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100%0.0000 0.0100 0.0200 0.0300 0.0400 0.0500 0.0600 0.0700 0.0800 0 500 1000 1500 2000 2500Runoff, cfsTime, minutes Surface Inflow Infiltration Capacity Percolation to Subsurface Overflow Surface Capacity 0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100%0.0000 0.0100 0.0200 0.0300 0.0400 0.0500 0.0600 0 500 1000 1500 2000 2500Runoff, cfsTime, minutes Rock Inflow Infiltration Capacity Overflow Rock Capacity 800 Willamette Street, Suite 400 Eugene, OR 97401 541.684.4902 kpff.com SBUH Calculation Worksheet for City of Springfield Storm Events Project Name: Lifepoint Rehab Date: 12/11/2023 Designer: MAR Basin: 2 User-Supplied Data Pervious Area Impervious Area Pervious Area, SF 12,104 9,058 Pervious Area, Acres 0.28 0.21 Pervious Area Curve Number, CNperv 80 98 Time of Concentration, Tc, minutes 5 Note: minimum Tc is five minutes City of Springfield 24-Hour Rainfall Depths (NRCS Type 1A distribution) Recurrence Interval WQ 2-Yr 5-Yr 10-Yr 25-Yr 50-Yr 100-Yr Inches 0.83 3.3 3.8 4.3 4.8 5.2 Calculated Data Total Project Area, Acres 0.49 Total Project Area, Square Feet 21,162 Recurrence Interval WQ 2-Yr 5-Yr 10-Yr 25-Yr 50-Yr 100-Yr Peak Flow Rate, Qpeak, cfs 0.04 0.28 0.34 0.40 0.46 0.00 0.51 Total Runoff Volume, V, cubic feet 512 3,807 4,585 5,380 6,187 0 6,841 Time to Peak Runoff, hours 7.83 7.83 7.83 7.83 7.83 0.00 7.83 Runoff Hydrograph Impervious Area, SF Impervious Area, Acres Impervious Area Curve Number, CNimp 0.00 0.10 0.20 0.30 0.40 0.50 0.60 0 500 1000 1500 2000 2500Runoff, cfsTime, minutes WQ 2-Year 5-Year 10-Year 25-Year 50-Year 100-Year 800 Willamette Street, Suite 400 Eugene, OR 97401 541.684.4902 kpff.com Springfield Stormwater Facility Calculator Project Name: Lifepoint Rehab Basin: 2 Instructions:Date: 12/11/2023 1. Choose Facility Type 2. Choose shape 3. Complete information in highlighted cells Facility Swale Swale Type Vegetated Shape Rectangular Below-Grade See Swale Worksheet 40 sf See Swale Worksheet 40 sf 5 ft 12 in 4 to 1 Void Space:0.40 .3 to .4 6 in (typ.) 18 in Tested infiltration rate 2.00 in/hr Infiltration Safety Factor 2.00 Surface Storage Capacity 230 cf Rock Storage Capacity 96 cf Infiltration Area 478 sf Design Infiltration Rate 1.00 in/hr GM Infiltration Rate 2.5 in/hr Infiltration Capacity 0.023 cfs Infiltration Capacity (avg)0.028 cfs Results SURFACE CAPACITY Recurrance Interval Peak Flow (cfs) Volume (cf) Meets Infiltration? WQ 0.0000 0 Yes 2-Yr 0.2492 1,679 5-Yr 0.3100 2,390 10-Yr 0.3723 3,184 25-Yr 0.4358 3,966 50-Yr 0.0000 0 100-Yr 0.4873 4,602 100% 5% 0% 100% Rock Capacity 6% 100% 100% 100% Rock w/ Perf WATER QUALITY EVENT PASS ROCK CAPACITY 6% Swale Worksheet Project Name: Lifepoint Rehab Basin: 2 Instructions:Date: 12/11/2023 1. Complete information in highlighted cells (downstream depth = top of check dam or overflow) 2. Click ''calculate'' at the end of the facility segment line 1 12 0.01 2 6 3 3 2 12 23 48 10 0.8 0.119 1.68 2 12 0.01 2 6 3 3 2 12 23 48 10 0.8 0.119 1.68 3 12 0.01 2 6 3 3 2 12 23 48 10 0.8 0.119 1.68 4 12 0.01 2 6 3 3 2 12 23 48 10 0.8 0.119 1.68 5 12 0.01 2 6 3 3 2 12 23 48 10 0.8 0.119 1.68 6 12 0.01 2 6 3 3 2 12 23 48 10 0.8 0.119 1.68 7 12 0.01 2 6 3 3 2 12 23 48 10 0.8 0.119 1.68 8 12 0.01 2 6 3 3 2 12 23 48 10 0.8 0.119 1.68 9 12 0.01 2 6 3 3 2 12 23 48 10 0.8 0.119 1.68 10 12 0.01 2 6 3 3 2 12 23 48 10 0.8 0.119 1.68 11 0 0 0 12 0 0 0 13 0 0 0 14 0 0 0 15 0 0 0 16 0 0 0 17 0 0 0 18 0 0 0 19 0 0 0 20 0 0 0 16.80 Max 0.8 0.119 Total Residence Time: 3. If any cell turns red, it does not meet the city's requirements. If facility segment identifier turns red, consider shortening length between check dams or increasing the depth because the segment's capacity is not being fully utilized Left Side Slope (X:1) Facil- ity Seg- ment (ft) Length (ft) WQ Velo- city (ft/s) Down- stream Depth (in) Right Side Slope (X:1) Slope (ft/ft) Resi- dence Time (m) Storage Capa- city (cf) Infiltra- tion Area (sf) Rock Depth (in) Rock Width (ft) Bottom Width (ft) WQ Flow Depth (in) Rock Capa- city (cf) Project Name: Lifepoint Rehab Basin: 2 Date: 12/11/2023Water Quality Event Surface Facility Modeling Water Quality Event Below Grade Modeling 0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100%0.0000 0.0050 0.0100 0.0150 0.0200 0.0250 0.0300 0.0350 0.0400 0 500 1000 1500 2000 2500Runoff, cfsTime, minutes Surface Inflow Infiltration Capacity Percolation to Subsurface Overflow Surface Capacity 0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100%0.0000 0.0050 0.0100 0.0150 0.0200 0.0250 0.0300 0 500 1000 1500 2000 2500Runoff, cfsTime, minutes Rock Inflow Infiltration Capacity Overflow Rock Capacity 800 Willamette Street, Suite 400 Eugene, OR 97401 541.684.4902 kpff.com SBUH Calculation Worksheet for City of Springfield Storm Events Project Name: Lifepoint Rehab Date: 12/11/2023 Designer: MAR Basin: 3 User-Supplied Data Pervious Area Impervious Area Pervious Area, SF 7,541 8,054 Pervious Area, Acres 0.17 0.18 Pervious Area Curve Number, CNperv 80 98 Time of Concentration, Tc, minutes 5 Note: minimum Tc is five minutes City of Springfield 24-Hour Rainfall Depths (NRCS Type 1A distribution) Recurrence Interval WQ 2-Yr 5-Yr 10-Yr 25-Yr 50-Yr 100-Yr Inches 0.83 3.3 3.8 4.3 4.8 5.2 Calculated Data Total Project Area, Acres 0.36 Total Project Area, Square Feet 15,595 Recurrence Interval WQ 2-Yr 5-Yr 10-Yr 25-Yr 50-Yr 100-Yr Peak Flow Rate, Qpeak, cfs 0.03 0.22 0.27 0.31 0.36 0.00 0.40 Total Runoff Volume, V, cubic feet 445 2,988 3,573 4,168 4,772 0 5,259 Time to Peak Runoff, hours 7.83 7.83 7.83 7.83 7.83 0.00 7.83 Runoff Hydrograph Impervious Area, SF Impervious Area, Acres Impervious Area Curve Number, CNimp 0.00 0.05 0.10 0.15 0.20 0.25 0.30 0.35 0.40 0.45 0 500 1000 1500 2000 2500Runoff, cfsTime, minutes WQ 2-Year 5-Year 10-Year 25-Year 50-Year 100-Year 800 Willamette Street, Suite 400 Eugene, OR 97401 541.684.4902 kpff.com Springfield Stormwater Facility Calculator Project Name: Lifepoint Rehab Basin: 3 Instructions:Date: 12/11/2023 1. Choose Facility Type 2. Choose shape 3. Complete information in highlighted cells Facility Swale Swale Type Vegetated Shape Rectangular Below-Grade See Swale Worksheet 40 sf See Swale Worksheet 40 sf 5 ft 12 in 4 to 1 Void Space:0.40 .3 to .4 6 in (typ.) 18 in Tested infiltration rate 2.00 in/hr Infiltration Safety Factor 2.00 Surface Storage Capacity 184 cf Rock Storage Capacity 77 cf Infiltration Area 382 sf Design Infiltration Rate 1.00 in/hr GM Infiltration Rate 2.5 in/hr Infiltration Capacity 0.028 cfs Infiltration Capacity (avg)0.022 cfs Results SURFACE CAPACITY Recurrance Interval Peak Flow (cfs) Volume (cf) Meets Infiltration? WQ 0.0000 0 Yes 2-Yr 0.1979 1,069 5-Yr 0.2433 1,621 10-Yr 0.2896 2,197 25-Yr 0.3366 2,778 50-Yr 0.0000 0 100-Yr 0.3746 3,244 0% 7% 0% 0% Rock Capacity 0% 0% 0% 0% Rock w/ Perf WATER QUALITY EVENT PASS ROCK CAPACITY 0% Swale Worksheet Project Name: Lifepoint Rehab Basin: 3 Instructions:Date: 12/11/2023 1. Complete information in highlighted cells (downstream depth = top of check dam or overflow) 2. Click ''calculate'' at the end of the facility segment line 1 12 0.01 2 6 3 3 2 12 23 48 10 0.7 0.113 1.77 2 12 0.01 2 6 3 3 2 12 23 48 10 0.7 0.113 1.77 3 12 0.01 2 6 3 3 2 12 23 48 10 0.7 0.113 1.77 4 12 0.01 2 6 3 3 2 12 23 48 10 0.7 0.113 1.77 5 12 0.01 2 6 3 3 2 12 23 48 10 0.7 0.113 1.77 6 12 0.01 2 6 3 3 2 12 23 48 10 0.7 0.113 1.77 7 12 0.01 2 6 3 3 2 12 23 48 10 0.7 0.113 1.77 8 12 0.01 2 6 3 3 2 12 23 48 10 0.7 0.113 1.77 9 0 0 0 10 0 0 0 11 0 0 0 12 0 0 0 13 0 0 0 14 0 0 0 15 0 0 0 16 0 0 0 17 0 0 0 18 0 0 0 19 0 0 0 20 0 0 0 14.17 Max 0.7 0.113 Total Residence Time: 3. If any cell turns red, it does not meet the city's requirements. If facility segment identifier turns red, consider shortening length between check dams or increasing the depth because the segment's capacity is not being fully utilized Left Side Slope (X:1) Facil- ity Seg- ment (ft) Length (ft) WQ Velo- city (ft/s) Down- stream Depth (in) Right Side Slope (X:1) Slope (ft/ft) Resi- dence Time (m) Storage Capa- city (cf) Infiltra- tion Area (sf) Rock Depth (in) Rock Width (ft) Bottom Width (ft) WQ Flow Depth (in) Rock Capa- city (cf) Project Name: Lifepoint Rehab Basin: 3 Date: 12/11/2023Water Quality Event Surface Facility Modeling Water Quality Event Below Grade Modeling 0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100%0.0000 0.0050 0.0100 0.0150 0.0200 0.0250 0.0300 0.0350 0 500 1000 1500 2000 2500Runoff, cfsTime, minutes Surface Inflow Infiltration Capacity Percolation to Subsurface Overflow Surface Capacity 0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100%0.0000 0.0050 0.0100 0.0150 0.0200 0.0250 0.0300 0 500 1000 1500 2000 2500Runoff, cfsTime, minutes Rock Inflow Infiltration Capacity Overflow Rock Capacity 800 Willamette Street, Suite 400 Eugene, OR 97401 541.684.4902 kpff.com SBUH Calculation Worksheet for City of Springfield Storm Events Project Name: Lifepoint Rehab Date: 12/11/2023 Designer: MAR Basin: 4 User-Supplied Data Pervious Area Impervious Area Pervious Area, SF 12,294 29,760 Pervious Area, Acres 0.28 0.68 Pervious Area Curve Number, CNperv 80 98 Time of Concentration, Tc, minutes 5 Note: minimum Tc is five minutes City of Springfield 24-Hour Rainfall Depths (NRCS Type 1A distribution) Recurrence Interval WQ 2-Yr 5-Yr 10-Yr 25-Yr 50-Yr 100-Yr Inches 0.83 3.3 3.8 4.3 4.8 5.2 Calculated Data Total Project Area, Acres 0.97 Total Project Area, Square Feet 42,054 Recurrence Interval WQ 2-Yr 5-Yr 10-Yr 25-Yr 50-Yr 100-Yr Peak Flow Rate, Qpeak, cfs 0.12 0.69 0.81 0.94 1.07 0.00 1.17 Total Runoff Volume, V, cubic feet 1,594 9,122 10,766 12,428 14,103 0 15,451 Time to Peak Runoff, hours 7.83 7.83 7.83 7.83 7.83 0.00 7.83 Runoff Hydrograph Impervious Area, SF Impervious Area, Acres Impervious Area Curve Number, CNimp 0.00 0.20 0.40 0.60 0.80 1.00 1.20 1.40 0 500 1000 1500 2000 2500Runoff, cfsTime, minutes WQ 2-Year 5-Year 10-Year 25-Year 50-Year 100-Year 800 Willamette Street, Suite 400 Eugene, OR 97401 541.684.4902 kpff.com Springfield Stormwater Facility Calculator Project Name: Lifepoint Rehab Basin: 4 Instructions:Date: 12/11/2023 1. Choose Facility Type 2. Choose shape 3. Complete information in highlighted cells Facility Swale Swale Type Vegetated Shape Rectangular Below-Grade See Swale Worksheet 40 sf See Swale Worksheet 40 sf 5 ft 12 in 4 to 1 Void Space:0.40 .3 to .4 6 in (typ.) 18 in Tested infiltration rate 2.00 in/hr Infiltration Safety Factor 2.00 Surface Storage Capacity 396 cf Rock Storage Capacity 288 cf Infiltration Area 958 sf Design Infiltration Rate 1.00 in/hr GM Infiltration Rate 2.5 in/hr Infiltration Capacity 0.023 cfs Infiltration Capacity (avg)0.055 cfs Results SURFACE CAPACITY Recurrance Interval Peak Flow (cfs) Volume (cf) Meets Infiltration? WQ 0.0000 0 Yes 2-Yr 0.6637 6,522 5-Yr 0.7892 8,157 10-Yr 0.9161 9,827 25-Yr 1.0440 11,490 50-Yr 0.0000 0 100-Yr 1.1470 12,846 100% 23% 0% 100% Rock Capacity 64% 100% 100% 100% Rock w/ Perf WATER QUALITY EVENT PASS ROCK CAPACITY 64% Swale Worksheet Project Name: Lifepoint Rehab Basin: 4 Instructions:Date: 12/11/2023 1. Complete information in highlighted cells (downstream depth = top of check dam or overflow) 2. Click ''calculate'' at the end of the facility segment line 1 12 0.01 6 6 3 3 6 12 40 96 29 1.4 0.119 1.68 2 12 0.01 6 6 3 3 6 12 40 96 29 1.4 0.119 1.68 3 12 0.01 6 6 3 3 6 12 40 96 29 1.4 0.119 1.68 4 12 0.01 6 6 3 3 6 12 40 96 29 1.4 0.119 1.68 5 12 0.01 6 6 3 3 6 12 40 96 29 1.4 0.119 1.68 6 12 0.01 6 6 3 3 6 12 40 96 29 1.4 0.119 1.68 7 12 0.01 6 6 3 3 6 12 40 96 29 1.4 0.119 1.68 8 12 0.01 6 6 3 3 6 12 40 96 29 1.4 0.119 1.68 9 12 0.01 6 6 3 3 6 12 40 96 29 1.4 0.119 1.68 10 12 0.01 6 6 3 3 6 12 40 96 29 1.4 0.119 1.68 11 0 0 0 12 0 0 0 13 0 0 0 14 0 0 0 15 0 0 0 16 0 0 0 17 0 0 0 18 0 0 0 19 0 0 0 20 0 0 0 16.79 Max 1.4 0.119 Total Residence Time: 3. If any cell turns red, it does not meet the city's requirements. If facility segment identifier turns red, consider shortening length between check dams or increasing the depth because the segment's capacity is not being fully utilized Left Side Slope (X:1) Facil- ity Seg- ment (ft) Length (ft) WQ Velo- city (ft/s) Down- stream Depth (in) Right Side Slope (X:1) Slope (ft/ft) Resi- dence Time (m) Storage Capa- city (cf) Infiltra- tion Area (sf) Rock Depth (in) Rock Width (ft) Bottom Width (ft) WQ Flow Depth (in) Rock Capa- city (cf) Project Name: Lifepoint Rehab Basin: 4 Date: 12/11/2023Water Quality Event Surface Facility Modeling Water Quality Event Below Grade Modeling 0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100%0.0000 0.0200 0.0400 0.0600 0.0800 0.1000 0.1200 0.1400 0 500 1000 1500 2000 2500Runoff, cfsTime, minutes Surface Inflow Infiltration Capacity Percolation to Subsurface Overflow Surface Capacity 0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100%0.0000 0.0100 0.0200 0.0300 0.0400 0.0500 0.0600 0 500 1000 1500 2000 2500Runoff, cfsTime, minutes Rock Inflow Infiltration Capacity Overflow Rock Capacity 800 Willamette Street, Suite 400 Eugene, OR 97401 541.684.4902 kpff.com SBUH Calculation Worksheet for City of Springfield Storm Events Project Name: Lifepoint Rehab Date: 10/24/2023 Designer: MAR Basin: 5 User-Supplied Data Pervious Area Impervious Area Pervious Area, SF 11,730 15,232 Pervious Area, Acres 0.27 0.35 Pervious Area Curve Number, CNperv 80 98 Time of Concentration, Tc, minutes 5 Note: minimum Tc is five minutes City of Springfield 24-Hour Rainfall Depths (NRCS Type 1A distribution) Recurrence Interval WQ 2-Yr 5-Yr 10-Yr 25-Yr 50-Yr 100-Yr Inches 0.83 3.3 3.8 4.3 4.8 5.2 Calculated Data Total Project Area, Acres 0.62 Total Project Area, Square Feet 26,962 Recurrence Interval WQ 2-Yr 5-Yr 10-Yr 25-Yr 50-Yr 100-Yr Peak Flow Rate, Qpeak, cfs 0.06 0.40 0.47 0.55 0.64 0.00 0.70 Total Runoff Volume, V, cubic feet 834 5,339 6,361 7,400 8,451 0 9,299 Time to Peak Runoff, hours 7.83 7.83 7.83 7.83 7.83 0.00 7.83 Runoff Hydrograph Impervious Area, SF Impervious Area, Acres Impervious Area Curve Number, CNimp 0.00 0.10 0.20 0.30 0.40 0.50 0.60 0.70 0.80 0 500 1000 1500 2000 2500Runoff, cfsTime, minutes WQ 2-Year 5-Year 10-Year 25-Year 50-Year 100-Year 800 Willamette Street, Suite 400 Eugene, OR 97401 541.684.4902 kpff.com Springfield Stormwater Facility Calculator Project Name: Lifepoint Rehab Basin: 5 Instructions:Date: 10/24/2023 1. Choose Facility Type 2. Choose shape 3. Complete information in highlighted cells Facility Swale Swale Type Vegetated Shape Rectangular Below-Grade See Swale Worksheet 40 sf See Swale Worksheet 40 sf 5 ft 12 in 4 to 1 Void Space:0.40 .3 to .4 6 in (typ.) 18 in Tested infiltration rate 2.00 in/hr Infiltration Safety Factor 2.00 Surface Storage Capacity 390 cf Rock Storage Capacity 283 cf Infiltration Area 942 sf Design Infiltration Rate 1.00 in/hr GM Infiltration Rate 2.5 in/hr Infiltration Capacity 0.023 cfs Infiltration Capacity (avg)0.055 cfs Results SURFACE CAPACITY Recurrance Interval Peak Flow (cfs) Volume (cf) Meets Infiltration? WQ 0.0000 0 Yes 2-Yr 0.3411 2,818 5-Yr 0.4230 3,820 10-Yr 0.5317 4,807 25-Yr 0.6132 5,861 50-Yr 0.0000 0 100-Yr 0.6790 6,713 WATER QUALITY EVENT PASS ROCK CAPACITY 19% Rock w/ Perf 2% 0% 100% Rock Capacity 19% 100% 100% 100% 100% Swale Worksheet Project Name: Lifepoint Rehab Basin: 5 Instructions:Date: 10/24/2023 1. Complete information in highlighted cells (downstream depth = top of check dam or overflow) 2. Click ''calculate'' at the end of the facility segment line 1 12 0.01 6 6 3 3 6 12 40 96 29 0.9 0.094 2.13 2 12 0.01 6 6 3 3 6 12 40 96 29 0.9 0.094 2.13 3 12 0.01 6 6 3 3 6 12 40 96 29 0.9 0.094 2.13 4 12 0.01 6 6 3 3 6 12 40 96 29 0.9 0.094 2.13 5 12 0.01 6 6 3 3 6 12 40 96 29 0.9 0.094 2.13 6 12 0.01 6 6 3 3 6 12 40 96 29 0.9 0.094 2.13 7 12 0.01 6 6 3 3 6 12 40 96 29 0.9 0.094 2.13 8 12 0.01 6 6 3 3 6 12 40 96 29 0.9 0.094 2.13 9 12 0.01 6 6 3 3 6 12 40 96 29 0.9 0.094 2.13 10 10 0.01 6 6 3 3 6 12 34 80 24 0.9 0.094 1.78 11 0 0 0 12 0 0 0 13 0 0 0 14 0 0 0 15 0 0 0 16 0 0 0 17 0 0 0 18 0 0 0 19 0 0 0 20 0 0 0 20.99 Max 0.9 0.094 Resi- dence Time (m) Storage Capa- city (cf) Infiltra- tion Area (sf) Rock Depth (in) Rock Width (ft) Bottom Width (ft) WQ Flow Depth (in) Rock Capa- city (cf) WQ Velo- city (ft/s) Down- stream Depth (in) Right Side Slope (X:1) Slope (ft/ft) Left Side Slope (X:1) Facil- ity Seg- ment (ft) Length (ft) Total Residence Time: 3. If any cell turns red, it does not meet the city's requirements. If facility segment identifier turns red, consider shortening length between check dams or increasing the depth because the segment's capacity is not being fully utilized Project Name: Lifepoint Rehab Basin: 5 Date: 10/24/2023Water Quality Event Surface Facility Modeling Water Quality Event Below Grade Modeling 0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100%0.0000 0.0100 0.0200 0.0300 0.0400 0.0500 0.0600 0.0700 0 500 1000 1500 2000 2500Runoff, cfsTime, minutes Surface Inflow Infiltration Capacity Percolation to Subsurface Overflow Surface Capacity 0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100%0.0000 0.0100 0.0200 0.0300 0.0400 0.0500 0.0600 0 500 1000 1500 2000 2500Runoff, cfsTime, minutes Rock Inflow Infiltration Capacity Overflow Rock Capacity 800 Willamette Street, Suite 400 Eugene, OR 97401 541.684.4902 kpff.com SBUH Calculation Worksheet for City of Springfield Storm Events Project Name: Lifepoint Rehab Date: 12/11/2023 Designer: MAR Basin: 6 User-Supplied Data Pervious Area Impervious Area Pervious Area, SF 23,839 47,611 Pervious Area, Acres 0.55 1.09 Pervious Area Curve Number, CNperv 80 98 Time of Concentration, Tc, minutes 5 Note: minimum Tc is five minutes City of Springfield 24-Hour Rainfall Depths (NRCS Type 1A distribution) Recurrence Interval WQ 2-Yr 5-Yr 10-Yr 25-Yr 50-Yr 100-Yr Inches 0.83 3.3 3.8 4.3 4.8 5.2 Calculated Data Total Project Area, Acres 1.64 Total Project Area, Square Feet 71,450 Recurrence Interval WQ 2-Yr 5-Yr 10-Yr 25-Yr 50-Yr 100-Yr Peak Flow Rate, Qpeak, cfs 0.20 1.13 1.34 1.56 1.78 0.00 1.95 Total Runoff Volume, V, cubic feet 2,564 15,108 17,877 20,679 23,508 0 25,786 Time to Peak Runoff, hours 7.83 7.83 7.83 7.83 7.83 0.00 7.83 Runoff Hydrograph Impervious Area, SF Impervious Area, Acres Impervious Area Curve Number, CNimp 0.00 0.50 1.00 1.50 2.00 2.50 0 500 1000 1500 2000 2500Runoff, cfsTime, minutes WQ 2-Year 5-Year 10-Year 25-Year 50-Year 100-Year 800 Willamette Street, Suite 400 Eugene, OR 97401 541.684.4902 kpff.com Lifepoint Rehabilitation Hospital | KPFF Consulting Engineers STORMWATER REPORT Appendix 5 Soil Survey United States Department of Agriculture A product of the National Cooperative Soil Survey, a joint effort of the United States Department of Agriculture and other Federal agencies, State agencies including the Agricultural Experiment Stations, and local participants Custom Soil Resource Report for Lane County Area, OregonNatural Resources Conservation Service October 24, 2023 Preface Soil surveys contain information that affects land use planning in survey areas. They highlight soil limitations that affect various land uses and provide information about the properties of the soils in the survey areas. Soil surveys are designed for many different users, including farmers, ranchers, foresters, agronomists, urban planners, community officials, engineers, developers, builders, and home buyers. Also, conservationists, teachers, students, and specialists in recreation, waste disposal, and pollution control can use the surveys to help them understand, protect, or enhance the environment. Various land use regulations of Federal, State, and local governments may impose special restrictions on land use or land treatment. Soil surveys identify soil properties that are used in making various land use or land treatment decisions. The information is intended to help the land users identify and reduce the effects of soil limitations on various land uses. The landowner or user is responsible for identifying and complying with existing laws and regulations. Although soil survey information can be used for general farm, local, and wider area planning, onsite investigation is needed to supplement this information in some cases. Examples include soil quality assessments (http://www.nrcs.usda.gov/wps/ portal/nrcs/main/soils/health/) and certain conservation and engineering applications. For more detailed information, contact your local USDA Service Center (https://offices.sc.egov.usda.gov/locator/app?agency=nrcs) or your NRCS State Soil Scientist (http://www.nrcs.usda.gov/wps/portal/nrcs/detail/soils/contactus/? cid=nrcs142p2_053951). Great differences in soil properties can occur within short distances. Some soils are seasonally wet or subject to flooding. Some are too unstable to be used as a foundation for buildings or roads. Clayey or wet soils are poorly suited to use as septic tank absorption fields. A high water table makes a soil poorly suited to basements or underground installations. The National Cooperative Soil Survey is a joint effort of the United States Department of Agriculture and other Federal agencies, State agencies including the Agricultural Experiment Stations, and local agencies. The Natural Resources Conservation Service (NRCS) has leadership for the Federal part of the National Cooperative Soil Survey. Information about soils is updated periodically. Updated information is available through the NRCS Web Soil Survey, the site for official soil survey information. The U.S. Department of Agriculture (USDA) prohibits discrimination in all its programs and activities on the basis of race, color, national origin, age, disability, and where applicable, sex, marital status, familial status, parental status, religion, sexual orientation, genetic information, political beliefs, reprisal, or because all or a part of an individual's income is derived from any public assistance program. (Not all prohibited bases apply to all programs.) Persons with disabilities who require 2 alternative means for communication of program information (Braille, large print, audiotape, etc.) should contact USDA's TARGET Center at (202) 720-2600 (voice and TDD). To file a complaint of discrimination, write to USDA, Director, Office of Civil Rights, 1400 Independence Avenue, S.W., Washington, D.C. 20250-9410 or call (800) 795-3272 (voice) or (202) 720-6382 (TDD). USDA is an equal opportunity provider and employer. 3 Contents Preface....................................................................................................................2 How Soil Surveys Are Made..................................................................................5 Soil Map..................................................................................................................8 Soil Map................................................................................................................9 Legend................................................................................................................10 Map Unit Legend................................................................................................11 Map Unit Descriptions.........................................................................................11 Lane County Area, Oregon.............................................................................13 75—Malabon silty clay loam........................................................................13 Soil Information for All Uses...............................................................................14 Soil Properties and Qualities..............................................................................14 Soil Qualities and Features.............................................................................14 Hydrologic Soil Group.................................................................................14 References............................................................................................................19 4 How Soil Surveys Are Made Soil surveys are made to provide information about the soils and miscellaneous areas in a specific area. They include a description of the soils and miscellaneous areas and their location on the landscape and tables that show soil properties and limitations affecting various uses. Soil scientists observed the steepness, length, and shape of the slopes; the general pattern of drainage; the kinds of crops and native plants; and the kinds of bedrock. They observed and described many soil profiles. A soil profile is the sequence of natural layers, or horizons, in a soil. The profile extends from the surface down into the unconsolidated material in which the soil formed or from the surface down to bedrock. The unconsolidated material is devoid of roots and other living organisms and has not been changed by other biological activity. Currently, soils are mapped according to the boundaries of major land resource areas (MLRAs). MLRAs are geographically associated land resource units that share common characteristics related to physiography, geology, climate, water resources, soils, biological resources, and land uses (USDA, 2006). Soil survey areas typically consist of parts of one or more MLRA. The soils and miscellaneous areas in a survey area occur in an orderly pattern that is related to the geology, landforms, relief, climate, and natural vegetation of the area. Each kind of soil and miscellaneous area is associated with a particular kind of landform or with a segment of the landform. By observing the soils and miscellaneous areas in the survey area and relating their position to specific segments of the landform, a soil scientist develops a concept, or model, of how they were formed. Thus, during mapping, this model enables the soil scientist to predict with a considerable degree of accuracy the kind of soil or miscellaneous area at a specific location on the landscape. Commonly, individual soils on the landscape merge into one another as their characteristics gradually change. To construct an accurate soil map, however, soil scientists must determine the boundaries between the soils. They can observe only a limited number of soil profiles. Nevertheless, these observations, supplemented by an understanding of the soil-vegetation-landscape relationship, are sufficient to verify predictions of the kinds of soil in an area and to determine the boundaries. Soil scientists recorded the characteristics of the soil profiles that they studied. They noted soil color, texture, size and shape of soil aggregates, kind and amount of rock fragments, distribution of plant roots, reaction, and other features that enable them to identify soils. After describing the soils in the survey area and determining their properties, the soil scientists assigned the soils to taxonomic classes (units). Taxonomic classes are concepts. Each taxonomic class has a set of soil characteristics with precisely defined limits. The classes are used as a basis for comparison to classify soils systematically. Soil taxonomy, the system of taxonomic classification used in the United States, is based mainly on the kind and character of soil properties and the arrangement of horizons within the profile. After the soil 5 scientists classified and named the soils in the survey area, they compared the individual soils with similar soils in the same taxonomic class in other areas so that they could confirm data and assemble additional data based on experience and research. The objective of soil mapping is not to delineate pure map unit components; the objective is to separate the landscape into landforms or landform segments that have similar use and management requirements. Each map unit is defined by a unique combination of soil components and/or miscellaneous areas in predictable proportions. Some components may be highly contrasting to the other components of the map unit. The presence of minor components in a map unit in no way diminishes the usefulness or accuracy of the data. The delineation of such landforms and landform segments on the map provides sufficient information for the development of resource plans. If intensive use of small areas is planned, onsite investigation is needed to define and locate the soils and miscellaneous areas. Soil scientists make many field observations in the process of producing a soil map. The frequency of observation is dependent upon several factors, including scale of mapping, intensity of mapping, design of map units, complexity of the landscape, and experience of the soil scientist. Observations are made to test and refine the soil-landscape model and predictions and to verify the classification of the soils at specific locations. Once the soil-landscape model is refined, a significantly smaller number of measurements of individual soil properties are made and recorded. These measurements may include field measurements, such as those for color, depth to bedrock, and texture, and laboratory measurements, such as those for content of sand, silt, clay, salt, and other components. Properties of each soil typically vary from one point to another across the landscape. Observations for map unit components are aggregated to develop ranges of characteristics for the components. The aggregated values are presented. Direct measurements do not exist for every property presented for every map unit component. Values for some properties are estimated from combinations of other properties. While a soil survey is in progress, samples of some of the soils in the area generally are collected for laboratory analyses and for engineering tests. Soil scientists interpret the data from these analyses and tests as well as the field-observed characteristics and the soil properties to determine the expected behavior of the soils under different uses. Interpretations for all of the soils are field tested through observation of the soils in different uses and under different levels of management. Some interpretations are modified to fit local conditions, and some new interpretations are developed to meet local needs. Data are assembled from other sources, such as research information, production records, and field experience of specialists. For example, data on crop yields under defined levels of management are assembled from farm records and from field or plot experiments on the same kinds of soil. Predictions about soil behavior are based not only on soil properties but also on such variables as climate and biological activity. Soil conditions are predictable over long periods of time, but they are not predictable from year to year. For example, soil scientists can predict with a fairly high degree of accuracy that a given soil will have a high water table within certain depths in most years, but they cannot predict that a high water table will always be at a specific level in the soil on a specific date. After soil scientists located and identified the significant natural bodies of soil in the survey area, they drew the boundaries of these bodies on aerial photographs and Custom Soil Resource Report 6 identified each as a specific map unit. Aerial photographs show trees, buildings, fields, roads, and rivers, all of which help in locating boundaries accurately. Custom Soil Resource Report 7 Soil Map The soil map section includes the soil map for the defined area of interest, a list of soil map units on the map and extent of each map unit, and cartographic symbols displayed on the map. Also presented are various metadata about data used to produce the map, and a description of each soil map unit. 8 9 Custom Soil Resource Report Soil Map 488140048814204881440488146048814804881500488152048815404881560488140048814204881440488146048814804881500488152048815404881560497180 497200 497220 497240 497260 497280 497300 497180 497200 497220 497240 497260 497280 497300 44° 5' 14'' N 123° 2' 7'' W44° 5' 14'' N123° 2' 1'' W44° 5' 8'' N 123° 2' 7'' W44° 5' 8'' N 123° 2' 1'' WN Map projection: Web Mercator Corner coordinates: WGS84 Edge tics: UTM Zone 10N WGS84 0 40 80 160 240 Feet 0 10 20 40 60 Meters Map Scale: 1:899 if printed on A portrait (8.5" x 11") 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 1:20,000. 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: Lane County Area, Oregon Survey Area Data: Version 22, Sep 8, 2023 Soil map units are labeled (as space allows) for map scales 1:50,000 or larger. Date(s) aerial images were photographed: Jun 12, 2019—Jun 19, 2019 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. Custom Soil Resource Report 10 Map Unit Legend Map Unit Symbol Map Unit Name Acres in AOI Percent of AOI 75 Malabon silty clay loam 4.0 100.0% Totals for Area of Interest 4.0 100.0% Map Unit Descriptions The map units delineated on the detailed soil maps in a soil survey represent the soils or miscellaneous areas in the survey area. The map unit descriptions, along with the maps, can be used to determine the composition and properties of a unit. A map unit delineation on a soil map represents an area dominated by one or more major kinds of soil or miscellaneous areas. A map unit is identified and named according to the taxonomic classification of the dominant soils. Within a taxonomic class there are precisely defined limits for the properties of the soils. On the landscape, however, the soils are natural phenomena, and they have the characteristic variability of all natural phenomena. Thus, the range of some observed properties may extend beyond the limits defined for a taxonomic class. Areas of soils of a single taxonomic class rarely, if ever, can be mapped without including areas of other taxonomic classes. Consequently, every map unit is made up of the soils or miscellaneous areas for which it is named and some minor components that belong to taxonomic classes other than those of the major soils. Most minor soils have properties similar to those of the dominant soil or soils in the map unit, and thus they do not affect use and management. These are called noncontrasting, or similar, components. They may or may not be mentioned in a particular map unit description. Other minor components, however, have properties and behavioral characteristics divergent enough to affect use or to require different management. These are called contrasting, or dissimilar, components. They generally are in small areas and could not be mapped separately because of the scale used. Some small areas of strongly contrasting soils or miscellaneous areas are identified by a special symbol on the maps. If included in the database for a given area, the contrasting minor components are identified in the map unit descriptions along with some characteristics of each. A few areas of minor components may not have been observed, and consequently they are not mentioned in the descriptions, especially where the pattern was so complex that it was impractical to make enough observations to identify all the soils and miscellaneous areas on the landscape. The presence of minor components in a map unit in no way diminishes the usefulness or accuracy of the data. The objective of mapping is not to delineate pure taxonomic classes but rather to separate the landscape into landforms or landform segments that have similar use and management requirements. The delineation of such segments on the map provides sufficient information for the development of resource plans. If intensive use of small areas is planned, however, onsite investigation is needed to define and locate the soils and miscellaneous areas. Custom Soil Resource Report 11 An identifying symbol precedes the map unit name in the map unit descriptions. Each description includes general facts about the unit and gives important soil properties and qualities. Soils that have profiles that are almost alike make up a soil series. Except for differences in texture of the surface layer, all the soils of a series have major horizons that are similar in composition, thickness, and arrangement. Soils of one series can differ in texture of the surface layer, slope, stoniness, salinity, degree of erosion, and other characteristics that affect their use. On the basis of such differences, a soil series is divided into soil phases. Most of the areas shown on the detailed soil maps are phases of soil series. The name of a soil phase commonly indicates a feature that affects use or management. For example, Alpha silt loam, 0 to 2 percent slopes, is a phase of the Alpha series. Some map units are made up of two or more major soils or miscellaneous areas. These map units are complexes, associations, or undifferentiated groups. A complex consists of two or more soils or miscellaneous areas in such an intricate pattern or in such small areas that they cannot be shown separately on the maps. The pattern and proportion of the soils or miscellaneous areas are somewhat similar in all areas. Alpha-Beta complex, 0 to 6 percent slopes, is an example. An association is made up of two or more geographically associated soils or miscellaneous areas that are shown as one unit on the maps. Because of present or anticipated uses of the map units in the survey area, it was not considered practical or necessary to map the soils or miscellaneous areas separately. The pattern and relative proportion of the soils or miscellaneous areas are somewhat similar. Alpha-Beta association, 0 to 2 percent slopes, is an example. An undifferentiated group is made up of two or more soils or miscellaneous areas that could be mapped individually but are mapped as one unit because similar interpretations can be made for use and management. The pattern and proportion of the soils or miscellaneous areas in a mapped area are not uniform. An area can be made up of only one of the major soils or miscellaneous areas, or it can be made up of all of them. Alpha and Beta soils, 0 to 2 percent slopes, is an example. Some surveys include miscellaneous areas. Such areas have little or no soil material and support little or no vegetation. Rock outcrop is an example. Custom Soil Resource Report 12 Lane County Area, Oregon 75—Malabon silty clay loam Map Unit Setting National map unit symbol: 238s Elevation: 300 to 650 feet Mean annual precipitation: 40 to 60 inches Mean annual air temperature: 52 to 54 degrees F Frost-free period: 165 to 210 days Farmland classification: All areas are prime farmland Map Unit Composition Malabon and similar soils:90 percent Estimates are based on observations, descriptions, and transects of the mapunit. Description of Malabon Setting Landform:Terraces Landform position (three-dimensional):Tread Down-slope shape:Linear Across-slope shape:Linear Parent material:Silty and clayey alluvium Typical profile H1 - 0 to 12 inches: silty clay loam H2 - 12 to 42 inches: silty clay H3 - 42 to 60 inches: clay loam Properties and qualities Slope:0 to 3 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 (0.20 to 0.57 in/hr) Depth to water table:More than 80 inches Frequency of flooding:None Frequency of ponding:None Available water supply, 0 to 60 inches: High (about 11.4 inches) Interpretive groups Land capability classification (irrigated): 1 Land capability classification (nonirrigated): 1 Hydrologic Soil Group: C Ecological site: R002XC006OR - Stream Terrace Group Forage suitability group: Well drained < 15% Slopes (G002XY002OR) Other vegetative classification: Well drained < 15% Slopes (G002XY002OR) Hydric soil rating: No Custom Soil Resource Report 13 Soil Information for All Uses Soil Properties and Qualities The Soil Properties and Qualities section includes various soil properties and qualities displayed as thematic maps with a summary table for the soil map units in the selected area of interest. A single value or rating for each map unit is generated by aggregating the interpretive ratings of individual map unit components. This aggregation process is defined for each property or quality. Soil Qualities and Features Soil qualities are behavior and performance attributes that are not directly measured, but are inferred from observations of dynamic conditions and from soil properties. Example soil qualities include natural drainage, and frost action. Soil features are attributes that are not directly part of the soil. Example soil features include slope and depth to restrictive layer. These features can greatly impact the use and management of the soil. Hydrologic Soil Group Hydrologic soil groups are based on estimates of runoff potential. Soils are assigned to one of four groups according to the rate of water infiltration when the soils are not protected by vegetation, are thoroughly wet, and receive precipitation from long-duration storms. The soils in the United States are assigned to four groups (A, B, C, and D) and three dual classes (A/D, B/D, and C/D). The groups are defined as follows: Group A. Soils having a high infiltration rate (low runoff potential) when thoroughly wet. These consist mainly of deep, well drained to excessively drained sands or gravelly sands. These soils have a high rate of water transmission. Group B. Soils having a moderate infiltration rate when thoroughly wet. These consist chiefly of moderately deep or deep, moderately well drained or well drained soils that have moderately fine texture to moderately coarse texture. These soils have a moderate rate of water transmission. 14 Group C. Soils having a slow infiltration rate when thoroughly wet. These consist chiefly of soils having a layer that impedes the downward movement of water or soils of moderately fine texture or fine texture. These soils have a slow rate of water transmission. Group D. Soils having a very slow infiltration rate (high runoff potential) when thoroughly wet. These consist chiefly of clays that have a high shrink-swell potential, soils that have a high water table, soils that have a claypan or clay layer at or near the surface, and soils that are shallow over nearly impervious material. These soils have a very slow rate of water transmission. If a soil is assigned to a dual hydrologic group (A/D, B/D, or C/D), the first letter is for drained areas and the second is for undrained areas. Only the soils that in their natural condition are in group D are assigned to dual classes. Custom Soil Resource Report 15 16 Custom Soil Resource Report Map—Hydrologic Soil Group 488140048814204881440488146048814804881500488152048815404881560488140048814204881440488146048814804881500488152048815404881560497180 497200 497220 497240 497260 497280 497300 497180 497200 497220 497240 497260 497280 497300 44° 5' 14'' N 123° 2' 7'' W44° 5' 14'' N123° 2' 1'' W44° 5' 8'' N 123° 2' 7'' W44° 5' 8'' N 123° 2' 1'' WN Map projection: Web Mercator Corner coordinates: WGS84 Edge tics: UTM Zone 10N WGS84 0 40 80 160 240 Feet 0 10 20 40 60 Meters Map Scale: 1:899 if printed on A portrait (8.5" x 11") sheet. Soil Map may not be valid at this scale. MAP LEGEND MAP INFORMATION Area of Interest (AOI) Area of Interest (AOI) Soils Soil Rating Polygons A A/D B B/D C C/D D Not rated or not available Soil Rating Lines A A/D B B/D C C/D D Not rated or not available Soil Rating Points A A/D B B/D C C/D D Not rated or not available 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 1:20,000. 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: Lane County Area, Oregon Survey Area Data: Version 22, Sep 8, 2023 Soil map units are labeled (as space allows) for map scales 1:50,000 or larger. Date(s) aerial images were photographed: Jun 12, 2019—Jun 19, 2019 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. Custom Soil Resource Report 17 Table—Hydrologic Soil Group Map unit symbol Map unit name Rating Acres in AOI Percent of AOI 75 Malabon silty clay loam C 4.0 100.0% Totals for Area of Interest 4.0 100.0% Rating Options—Hydrologic Soil Group Aggregation Method: Dominant Condition Component Percent Cutoff: None Specified Tie-break Rule: Higher Custom Soil Resource Report 18 References American Association of State Highway and Transportation Officials (AASHTO). 2004. Standard specifications for transportation materials and methods of sampling and testing. 24th edition. American Society for Testing and Materials (ASTM). 2005. Standard classification of soils for engineering purposes. ASTM Standard D2487-00. Cowardin, L.M., V. Carter, F.C. Golet, and E.T. LaRoe. 1979. Classification of wetlands and deep-water habitats of the United States. U.S. Fish and Wildlife Service FWS/OBS-79/31. Federal Register. July 13, 1994. Changes in hydric soils of the United States. Federal Register. September 18, 2002. Hydric soils of the United States. Hurt, G.W., and L.M. Vasilas, editors. Version 6.0, 2006. Field indicators of hydric soils in the United States. National Research Council. 1995. Wetlands: Characteristics and boundaries. Soil Survey Division Staff. 1993. Soil survey manual. Soil Conservation Service. U.S. Department of Agriculture Handbook 18. http://www.nrcs.usda.gov/wps/portal/ nrcs/detail/national/soils/?cid=nrcs142p2_054262 Soil Survey Staff. 1999. Soil taxonomy: A basic system of soil classification for making and interpreting soil surveys. 2nd edition. Natural Resources Conservation Service, U.S. Department of Agriculture Handbook 436. http:// www.nrcs.usda.gov/wps/portal/nrcs/detail/national/soils/?cid=nrcs142p2_053577 Soil Survey Staff. 2010. Keys to soil taxonomy. 11th edition. U.S. Department of Agriculture, Natural Resources Conservation Service. http:// www.nrcs.usda.gov/wps/portal/nrcs/detail/national/soils/?cid=nrcs142p2_053580 Tiner, R.W., Jr. 1985. Wetlands of Delaware. U.S. Fish and Wildlife Service and Delaware Department of Natural Resources and Environmental Control, Wetlands Section. United States Army Corps of Engineers, Environmental Laboratory. 1987. Corps of Engineers wetlands delineation manual. Waterways Experiment Station Technical Report Y-87-1. United States Department of Agriculture, Natural Resources Conservation Service. National forestry manual. http://www.nrcs.usda.gov/wps/portal/nrcs/detail/soils/ home/?cid=nrcs142p2_053374 United States Department of Agriculture, Natural Resources Conservation Service. National range and pasture handbook. http://www.nrcs.usda.gov/wps/portal/nrcs/ detail/national/landuse/rangepasture/?cid=stelprdb1043084 19 United States Department of Agriculture, Natural Resources Conservation Service. National soil survey handbook, title 430-VI. http://www.nrcs.usda.gov/wps/portal/ nrcs/detail/soils/scientists/?cid=nrcs142p2_054242 United States Department of Agriculture, Natural Resources Conservation Service. 2006. Land resource regions and major land resource areas of the United States, the Caribbean, and the Pacific Basin. U.S. Department of Agriculture Handbook 296. http://www.nrcs.usda.gov/wps/portal/nrcs/detail/national/soils/? cid=nrcs142p2_053624 United States Department of Agriculture, Soil Conservation Service. 1961. Land capability classification. U.S. Department of Agriculture Handbook 210. http:// www.nrcs.usda.gov/Internet/FSE_DOCUMENTS/nrcs142p2_052290.pdf Custom Soil Resource Report 20 541-684-4902| www.kpff.com