Attachment 06 Floodplains Frequency Class.pdf

Flooding Frequency Class—Brule and Buffalo Counties, South Dakota

(23. Floodplains - Eric Big Eagle)

Natural Resources Conservation Service

Web Soil Survey National Cooperative Soil Survey

10/13/2021

460580 460600 460620 460640 460660 460680 460700 460720 460740 460760 460780

460560 460580 460600 460620 460640 460660 460680 460700 460720 460740 460760 460780

44° 4' 18'' N

9'

3' ' W

44° 4' 18'' N

9'

2' ' W

44° 4' 13'' N

9'

3' ' W

44° 4' 13'' N

9'

2' ' W

N

Map projection: Web Mercator Corner coordinates: WGS84 Edge tics: UTM Zone 14N WGS84 0 50 100 200 300

Feet 0 15 30 60 90

Meters Map Scale: 1:1,030 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 Rating Polygons

None

Very Rare

Rare

Occasional

Frequent

Very Frequent

Not rated or not available

Soil Rating Lines None

Very Rare

Rare

Occasional

Frequent

Very Frequent

Not rated or not available

Soil Rating Points None

Very Rare

Rare

Occasional

Frequent

Very Frequent

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: Brule and Buffalo Counties, South Dakota Survey Area Data: Version 25, Sep 14, 2021

Soil map units are labeled (as space allows) for map scales 1:50,000 or larger.

Date(s) aerial images were photographed: Apr 29, 2012—Feb 6, 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.

Flooding Frequency Class—Brule and Buffalo Counties, South Dakota

(23. Floodplains - Eric Big Eagle)

Natural Resources Conservation Service

Web Soil Survey National Cooperative Soil Survey

10/13/2021

Flooding Frequency Class

Map unit symbol Map unit name Rating Acres in AOI Percent of AOI

LoA Lowry silt loam, 0 to 3 percent slopes

None 0.8 16.5%

LvB Lowry variant silt loam, 2 to 6 percent slopes

None 4.0 83.5%

Totals for Area of Interest 4.8 100.0%

Description

Flooding is the temporary inundation of an area caused by overflowing streams, by runoff from adjacent slopes, or by tides. Water standing for short periods after rainfall or snowmelt is not considered flooding, and water standing in swamps and marshes is considered ponding rather than flooding.

Frequency is expressed as none, very rare, rare, occasional, frequent, and very frequent.

"None" means that flooding is not probable. The chance of flooding is nearly 0 percent in any year. Flooding occurs less than once in 500 years.

"Very rare" means that flooding is very unlikely but possible under extremely unusual weather conditions. The chance of flooding is less than 1 percent in any year.

"Rare" means that flooding is unlikely but possible under unusual weather conditions. The chance of flooding is 1 to 5 percent in any year.

"Occasional" means that flooding occurs infrequently under normal weather conditions. The chance of flooding is 5 to 50 percent in any year.

"Frequent" means that flooding is likely to occur often under normal weather conditions. The chance of flooding is more than 50 percent in any year but is less than 50 percent in all months in any year.

"Very frequent" means that flooding is likely to occur very often under normal weather conditions. The chance of flooding is more than 50 percent in all months of any year.

Rating Options

Aggregation Method: Dominant Condition

Component Percent Cutoff: None Specified

Tie-break Rule: More Frequent

Flooding Frequency Class—Brule and Buffalo Counties, South Dakota 23. Floodplains - Eric Big Eagle

Natural Resources Conservation Service

Web Soil Survey National Cooperative Soil Survey

Beginning Month: January

Ending Month: December

Flooding Frequency Class—Brule and Buffalo Counties, South Dakota 23. Floodplains - Eric Big Eagle

Natural Resources Conservation Service

Web Soil Survey National Cooperative Soil Survey

Flooding Frequency Class—Hughes County, South Dakota

(23. Floodplains - Jeri Farmer)

Natural Resources Conservation Service

Web Soil Survey National Cooperative Soil Survey

3/14/2022

434980 435030 435080 435130 435180 435230 435280 435330 435380 435430

434980 435030 435080 435130 435180 435230 435280 435330 435380 435430

44° 9' 8'' N

8'

8' ' W

44° 9' 8'' N

8'

5' ' W

44° 8' 58'' N

8'

8' ' W

44° 8' 58'' N

8'

5' ' W

N

Map projection: Web Mercator Corner coordinates: WGS84 Edge tics: UTM Zone 14N WGS84 0 100 200 400 600

Feet 0 30 60 120 180

Meters Map Scale: 1:2,260 if printed on A landscape (11" x 8.5") sheet.

Area of Interest (AOI)

Soils Soil Rating Polygons

None

Very Rare

Rare

Occasional

Frequent

Very Frequent

Not rated or not available

Soil Rating Lines None

Very Rare

Rare

Occasional

Frequent

Very Frequent

Not rated or not available

Soil Rating Points None

Very Rare

Rare

Occasional

Frequent

Very Frequent

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: Hughes County, South Dakota Survey Area Data: Version 26, Sep 13, 2021

Soil map units are labeled (as space allows) for map scales 1:50,000 or larger.

Date(s) aerial images were photographed: Mar 28, 2021—Apr 3, 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.

Flooding Frequency Class—Hughes County, South Dakota

(23. Floodplains - Jeri Farmer)

Natural Resources Conservation Service

Web Soil Survey National Cooperative Soil Survey

3/14/2022

LoA Lowry silt loam, 0 to 3 percent slopes

None 21.0 95.4%

Sf Schamber-Orton complex

None 1.0 4.5%

SuD Sully silt loam, 9 to 15 percent slopes

None 0.0 0.1%

Totals for Area of Interest 22.0 100.0%

Description

Flooding is the temporary inundation of an area caused by overflowing streams, by runoff from adjacent slopes, or by tides. Water standing for short periods after rainfall or snowmelt is not considered flooding, and water standing in swamps and marshes is considered ponding rather than flooding.

Frequency is expressed as none, very rare, rare, occasional, frequent, and very frequent.

"None" means that flooding is not probable. The chance of flooding is nearly 0 percent in any year. Flooding occurs less than once in 500 years.

"Very rare" means that flooding is very unlikely but possible under extremely unusual weather conditions. The chance of flooding is less than 1 percent in any year.

"Rare" means that flooding is unlikely but possible under unusual weather conditions. The chance of flooding is 1 to 5 percent in any year.

"Occasional" means that flooding occurs infrequently under normal weather conditions. The chance of flooding is 5 to 50 percent in any year.

"Frequent" means that flooding is likely to occur often under normal weather conditions. The chance of flooding is more than 50 percent in any year but is less than 50 percent in all months in any year.

"Very frequent" means that flooding is likely to occur very often under normal weather conditions. The chance of flooding is more than 50 percent in all months of any year.

Rating Options

Aggregation Method: Dominant Condition

Component Percent Cutoff: None Specified

Flooding Frequency Class—Hughes County, South Dakota 23. Floodplains - Jeri Farmer

Natural Resources Conservation Service

Web Soil Survey National Cooperative Soil Survey

Tie-break Rule: More Frequent

Ending Month: December

Flooding Frequency Class—Hughes County, South Dakota 23. Floodplains - Jeri Farmer

Natural Resources Conservation Service

Web Soil Survey National Cooperative Soil Survey

(Q23 - Floodplains (Anthea Isburg))

Natural Resources Conservation Service

Web Soil Survey National Cooperative Soil Survey

3/25/2021

473560 473610 473660 473710 473760 473810 473860 473910 473960 474010

473560 473610 473660 473710 473760 473810 473860 473910 473960 474010

44° 0' 7'' N

9'

8' ' W

44° 0' 7'' N

9'

5' ' W

43° 59' 56'' N

9'

8' ' W

43° 59' 56'' N

9'

5' ' W

N

Map projection: Web Mercator Corner coordinates: WGS84 Edge tics: UTM Zone 14N WGS84 0 100 200 400 600

Feet 0 30 60 120 180

Meters Map Scale: 1:2,290 if printed on A landscape (11" x 8.5") sheet.

Area of Interest (AOI)

Soils Soil Rating Polygons

None

Very Rare

Rare

Occasional

Frequent

Very Frequent

Not rated or not available

Soil Rating Lines None

Very Rare

Rare

Occasional

Frequent

Very Frequent

Not rated or not available

Soil Rating Points None

Very Rare

Rare

Occasional

Frequent

Very Frequent

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: Brule and Buffalo Counties, South Dakota Survey Area Data: Version 24, Jun 4, 2020

Soil map units are labeled (as space allows) for map scales 1:50,000 or larger.

Date(s) aerial images were photographed: Apr 29, 2012—Feb 6, 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.

Flooding Frequency Class—Brule and Buffalo Counties, South Dakota (Q23 - Floodplains (Anthea Isburg))

Natural Resources Conservation Service

Web Soil Survey National Cooperative Soil Survey

3/25/2021

LoA Lowry silt loam, 0 to 3 percent slopes

None 0.4 2.3%

LvA Lowry variant silt loam, 0 to 2 percent slopes

None 10.0 53.1%

LvB Lowry variant silt loam, 2 to 6 percent slopes

None 3.5 18.7%

MoA Mobridge silt loam, 0 to 2 percent slopes

None 4.9 25.9%

Totals for Area of Interest 18.9 100.0%

Description

Flooding is the temporary inundation of an area caused by overflowing streams, by runoff from adjacent slopes, or by tides. Water standing for short periods after rainfall or snowmelt is not considered flooding, and water standing in swamps and marshes is considered ponding rather than flooding.

Frequency is expressed as none, very rare, rare, occasional, frequent, and very frequent.

"None" means that flooding is not probable. The chance of flooding is nearly 0 percent in any year. Flooding occurs less than once in 500 years.

"Very rare" means that flooding is very unlikely but possible under extremely unusual weather conditions. The chance of flooding is less than 1 percent in any year.

"Rare" means that flooding is unlikely but possible under unusual weather conditions. The chance of flooding is 1 to 5 percent in any year.

"Occasional" means that flooding occurs infrequently under normal weather conditions. The chance of flooding is 5 to 50 percent in any year.

"Frequent" means that flooding is likely to occur often under normal weather conditions. The chance of flooding is more than 50 percent in any year but is less than 50 percent in all months in any year.

"Very frequent" means that flooding is likely to occur very often under normal weather conditions. The chance of flooding is more than 50 percent in all months of any year.

Flooding Frequency Class—Brule and Buffalo Counties, South Dakota Q23 - Floodplains (Anthea Isburg)

Natural Resources Conservation Service

Web Soil Survey National Cooperative Soil Survey

Rating Options

Aggregation Method: Dominant Condition

Component Percent Cutoff: None Specified

Tie-break Rule: More Frequent

Beginning Month: January

Ending Month: December

Flooding Frequency Class—Brule and Buffalo Counties, South Dakota Q23 - Floodplains (Anthea Isburg)

Natural Resources Conservation Service

Web Soil Survey National Cooperative Soil Survey

(23.Floodplains - Mikki Keeble)

Natural Resources Conservation Service

Web Soil Survey National Cooperative Soil Survey

4/14/2021

459140 459160 459180 459200 459220 459240 459260 459280 459300 459320 459340 459360 459380

459140 459160 459180 459200 459220 459240 459260 459280 459300 459320 459340 459360 459380

44° 8' 6'' N

0'

9' ' W

44° 8' 6'' N

0'

7' ' W

44° 8' 0'' N

0'

9' ' W

44° 8' 0'' N

0'

7' ' W

N

Map projection: Web Mercator Corner coordinates: WGS84 Edge tics: UTM Zone 14N WGS84 0 50 100 200 300

Feet 0 15 30 60 90

Meters Map Scale: 1:1,140 if printed on A landscape (11" x 8.5") sheet.

Area of Interest (AOI)

Soils Soil Rating Polygons

None

Very Rare

Rare

Occasional

Frequent

Very Frequent

Not rated or not available

Soil Rating Lines None

Very Rare

Rare

Occasional

Frequent

Very Frequent

Not rated or not available

Soil Rating Points None

Very Rare

Rare

Occasional

Frequent

Very Frequent

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: Brule and Buffalo Counties, South Dakota Survey Area Data: Version 24, Jun 4, 2020

Soil map units are labeled (as space allows) for map scales 1:50,000 or larger.

Date(s) aerial images were photographed: May 1, 2015—Feb 6, 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.

Flooding Frequency Class—Brule and Buffalo Counties, South Dakota (23.Floodplains - Mikki Keeble)

Natural Resources Conservation Service

Web Soil Survey National Cooperative Soil Survey

4/14/2021

OmC Opal clay, 6 to 9 percent slopes

None 3.0 58.7%

SaE Sansarc-Opal clays, 9 to 25 percent slopes

None 2.1 41.3%

Totals for Area of Interest 5.2 100.0%

Description

Flooding is the temporary inundation of an area caused by overflowing streams, by runoff from adjacent slopes, or by tides. Water standing for short periods after rainfall or snowmelt is not considered flooding, and water standing in swamps and marshes is considered ponding rather than flooding.

Frequency is expressed as none, very rare, rare, occasional, frequent, and very frequent.

"None" means that flooding is not probable. The chance of flooding is nearly 0 percent in any year. Flooding occurs less than once in 500 years.

"Very rare" means that flooding is very unlikely but possible under extremely unusual weather conditions. The chance of flooding is less than 1 percent in any year.

"Rare" means that flooding is unlikely but possible under unusual weather conditions. The chance of flooding is 1 to 5 percent in any year.

"Occasional" means that flooding occurs infrequently under normal weather conditions. The chance of flooding is 5 to 50 percent in any year.

"Frequent" means that flooding is likely to occur often under normal weather conditions. The chance of flooding is more than 50 percent in any year but is less than 50 percent in all months in any year.

"Very frequent" means that flooding is likely to occur very often under normal weather conditions. The chance of flooding is more than 50 percent in all months of any year.

Rating Options

Aggregation Method: Dominant Condition

Component Percent Cutoff: None Specified

Tie-break Rule: More Frequent

Flooding Frequency Class—Brule and Buffalo Counties, South Dakota 23.Floodplains - Mikki Keeble

Natural Resources Conservation Service

Web Soil Survey National Cooperative Soil Survey

Flooding Frequency Class—Brule and Buffalo Counties, South Dakota 23.Floodplains - Mikki Keeble

Natural Resources Conservation Service

Web Soil Survey National Cooperative Soil Survey

(23. Floodplains - Todd Kirkie)

Natural Resources Conservation Service

Web Soil Survey National Cooperative Soil Survey

2/17/2022

468740 468770 468800 468830 468860 468890 468920 468950 468980 469010

468740 468770 468800 468830 468860 468890 468920 468950 468980 469010

44° 5' 5'' N

3'

5' ' W

44° 5' 5'' N

3'

2' ' W

44° 4' 59'' N

3'

5' ' W

44° 4' 59'' N

3'

2' ' W

N

Map projection: Web Mercator Corner coordinates: WGS84 Edge tics: UTM Zone 14N WGS84 0 50 100 200 300

Feet 0 15 30 60 90

Meters Map Scale: 1:1,300 if printed on A landscape (11" x 8.5") sheet.

Area of Interest (AOI)

Soils Soil Rating Polygons

None

Very Rare

Rare

Occasional

Frequent

Very Frequent

Not rated or not available

Soil Rating Lines None

Very Rare

Rare

Occasional

Frequent

Very Frequent

Not rated or not available

Soil Rating Points None

Very Rare

Rare

Occasional

Frequent

Very Frequent

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: Brule and Buffalo Counties, South Dakota Survey Area Data: Version 25, Sep 14, 2021

Soil map units are labeled (as space allows) for map scales 1:50,000 or larger.

Date(s) aerial images were photographed: Apr 29, 2012—Feb 6, 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.

Flooding Frequency Class—Brule and Buffalo Counties, South Dakota

(23. Floodplains - Todd Kirkie)

Natural Resources Conservation Service

Web Soil Survey National Cooperative Soil Survey

2/17/2022

CsD Chantier-Sansarc clays, 3 to 15 percent slopes

None 0.6 10.3%

PrB Promise clay, 3 to 6 percent slopes

None 5.4 88.5%

Wt Wendte silty clay, channeled, occasionally flooded

Occasional 0.1 1.3%

Totals for Area of Interest 6.1 100.0%

Description

Flooding is the temporary inundation of an area caused by overflowing streams, by runoff from adjacent slopes, or by tides. Water standing for short periods after rainfall or snowmelt is not considered flooding, and water standing in swamps and marshes is considered ponding rather than flooding.

Frequency is expressed as none, very rare, rare, occasional, frequent, and very frequent.

"None" means that flooding is not probable. The chance of flooding is nearly 0 percent in any year. Flooding occurs less than once in 500 years.

"Very rare" means that flooding is very unlikely but possible under extremely unusual weather conditions. The chance of flooding is less than 1 percent in any year.

"Rare" means that flooding is unlikely but possible under unusual weather conditions. The chance of flooding is 1 to 5 percent in any year.

"Occasional" means that flooding occurs infrequently under normal weather conditions. The chance of flooding is 5 to 50 percent in any year.

"Frequent" means that flooding is likely to occur often under normal weather conditions. The chance of flooding is more than 50 percent in any year but is less than 50 percent in all months in any year.

"Very frequent" means that flooding is likely to occur very often under normal weather conditions. The chance of flooding is more than 50 percent in all months of any year.

Rating Options

Aggregation Method: Dominant Condition

Flooding Frequency Class—Brule and Buffalo Counties, South Dakota 23. Floodplains - Todd Kirkie

Natural Resources Conservation Service

Web Soil Survey National Cooperative Soil Survey

Component Percent Cutoff: None Specified

Tie-break Rule: More Frequent

Beginning Month: January

Ending Month: December

Flooding Frequency Class—Brule and Buffalo Counties, South Dakota 23. Floodplains - Todd Kirkie

Natural Resources Conservation Service

Web Soil Survey National Cooperative Soil Survey

Flooding Frequency Class—Hughes County, South Dakota

(23. Floodplains - Janette Marks)

Natural Resources Conservation Service

Web Soil Survey National Cooperative Soil Survey

10/13/2021

437510 437600 437690 437780 437870 437960 438050

437510 437600 437690 437780 437870 437960 438050

44° 14' 46'' N

6'

8' ' W

44° 14' 46'' N

6'

2' ' W

44° 14' 21'' N

6'

8' ' W

44° 14' 21'' N

6'

2' ' W

N

Map projection: Web Mercator Corner coordinates: WGS84 Edge tics: UTM Zone 14N WGS84 0 150 300 600 900

Feet 0 50 100 200 300

Meters Map Scale: 1:3,770 if printed on A portrait (8.5" x 11") sheet.

Area of Interest (AOI)

Soils Soil Rating Polygons

None

Very Rare

Rare

Occasional

Frequent

Very Frequent

Not rated or not available

Soil Rating Lines None

Very Rare

Rare

Occasional

Frequent

Very Frequent

Not rated or not available

Soil Rating Points None

Very Rare

Rare

Occasional

Frequent

Very Frequent

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: Hughes County, South Dakota Survey Area Data: Version 26, Sep 13, 2021

Soil map units are labeled (as space allows) for map scales 1:50,000 or larger.

Date(s) aerial images were photographed: May 1, 2015—Feb 6, 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.

Flooding Frequency Class—Hughes County, South Dakota

(23. Floodplains - Janette Marks)

Natural Resources Conservation Service

Web Soil Survey National Cooperative Soil Survey

HgA Highmore-DeGrey silt loams, 0 to 2 percent slopes

None 0.5 0.8%

HgB Highmore-DeGrey silt loams, 2 to 6 percent slopes

None 20.8 34.7%

HkA Highmore silt loam, 0 to 2 percent slopes

None 6.2 10.3%

PeD Peno-Gettys clay loams, 9 to 15 percent slopes

None 29.2 48.7%

W Water None 3.3 5.5%

Totals for Area of Interest 59.9 100.0%

Description

Flooding is the temporary inundation of an area caused by overflowing streams, by runoff from adjacent slopes, or by tides. Water standing for short periods after rainfall or snowmelt is not considered flooding, and water standing in swamps and marshes is considered ponding rather than flooding.

Frequency is expressed as none, very rare, rare, occasional, frequent, and very frequent.

"None" means that flooding is not probable. The chance of flooding is nearly 0 percent in any year. Flooding occurs less than once in 500 years.

"Very rare" means that flooding is very unlikely but possible under extremely unusual weather conditions. The chance of flooding is less than 1 percent in any year.

"Rare" means that flooding is unlikely but possible under unusual weather conditions. The chance of flooding is 1 to 5 percent in any year.

"Occasional" means that flooding occurs infrequently under normal weather conditions. The chance of flooding is 5 to 50 percent in any year.

"Frequent" means that flooding is likely to occur often under normal weather conditions. The chance of flooding is more than 50 percent in any year but is less than 50 percent in all months in any year.

"Very frequent" means that flooding is likely to occur very often under normal weather conditions. The chance of flooding is more than 50 percent in all months of any year.

Flooding Frequency Class—Hughes County, South Dakota 23. Floodplains - Janette Marks

Natural Resources Conservation Service

Web Soil Survey National Cooperative Soil Survey

Component Percent Cutoff: None Specified

Tie-break Rule: More Frequent

Beginning Month: January

Ending Month: December

Flooding Frequency Class—Hughes County, South Dakota 23. Floodplains - Janette Marks

Natural Resources Conservation Service

Web Soil Survey National Cooperative Soil Survey

(23. Floodplains - Sherry Powers)

Natural Resources Conservation Service

Web Soil Survey National Cooperative Soil Survey

2/17/2022

464090 464110 464130 464150 464170 464190 464210 464230 464250 464270 464290

464090 464110 464130 464150 464170 464190 464210 464230 464250 464270 464290

44° 4' 38'' N

6'

4' ' W

44° 4' 38'' N

6'

5' ' W

44° 4' 34'' N

6'

4' ' W

44° 4' 34'' N

6'

5' ' W

N

Map projection: Web Mercator Corner coordinates: WGS84 Edge tics: UTM Zone 14N WGS84 0 45 90 180 270

Feet 0 10 20 40 60

Meters Map Scale: 1:978 if printed on A landscape (11" x 8.5") sheet.

Area of Interest (AOI)

Soils Soil Rating Polygons

None

Very Rare

Rare

Occasional

Frequent

Very Frequent

Not rated or not available

Soil Rating Lines None

Very Rare

Rare

Occasional

Frequent

Very Frequent

Not rated or not available

Soil Rating Points None

Very Rare

Rare

Occasional

Frequent

Very Frequent

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: Brule and Buffalo Counties, South Dakota Survey Area Data: Version 25, Sep 14, 2021

Soil map units are labeled (as space allows) for map scales 1:50,000 or larger.

Date(s) aerial images were photographed: Apr 29, 2012—Feb 6, 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.

Flooding Frequency Class—Brule and Buffalo Counties, South Dakota

(23. Floodplains - Sherry Powers)

Natural Resources Conservation Service

Web Soil Survey National Cooperative Soil Survey

Do Dorna silt loam None 1.2 23.0%

MbA Millboro silt loam, 0 to 3 percent slopes

None 3.9 77.0%

Totals for Area of Interest 5.0 100.0%

Description

Flooding is the temporary inundation of an area caused by overflowing streams, by runoff from adjacent slopes, or by tides. Water standing for short periods after rainfall or snowmelt is not considered flooding, and water standing in swamps and marshes is considered ponding rather than flooding.

Frequency is expressed as none, very rare, rare, occasional, frequent, and very frequent.

"None" means that flooding is not probable. The chance of flooding is nearly 0 percent in any year. Flooding occurs less than once in 500 years.

"Very rare" means that flooding is very unlikely but possible under extremely unusual weather conditions. The chance of flooding is less than 1 percent in any year.

"Rare" means that flooding is unlikely but possible under unusual weather conditions. The chance of flooding is 1 to 5 percent in any year.

"Occasional" means that flooding occurs infrequently under normal weather conditions. The chance of flooding is 5 to 50 percent in any year.

"Frequent" means that flooding is likely to occur often under normal weather conditions. The chance of flooding is more than 50 percent in any year but is less than 50 percent in all months in any year.

"Very frequent" means that flooding is likely to occur very often under normal weather conditions. The chance of flooding is more than 50 percent in all months of any year.

Rating Options

Aggregation Method: Dominant Condition

Component Percent Cutoff: None Specified

Tie-break Rule: More Frequent

Beginning Month: January

Flooding Frequency Class—Brule and Buffalo Counties, South Dakota 23. Floodplains - Sherry Powers

Natural Resources Conservation Service

Web Soil Survey National Cooperative Soil Survey

Flooding Frequency Class—Brule and Buffalo Counties, South Dakota 23. Floodplains - Sherry Powers

Natural Resources Conservation Service

Web Soil Survey National Cooperative Soil Survey

(23. Floodplains - Melita Rank)

Natural Resources Conservation Service

Web Soil Survey National Cooperative Soil Survey

5/11/2021

472960 472980 473000 473020 473040 473060 473080 473100 473120 473140 473160 473180 473200 473220

472960 472980 473000 473020 473040 473060 473080 473100 473120 473140 473160 473180 473200 473220

44° 0' 9'' N

0'

4' ' W

44° 0' 9'' N

0'

'' W

44° 0' 3'' N

0'

4' ' W

44° 0' 3'' N

0'

'' W

N

Map projection: Web Mercator Corner coordinates: WGS84 Edge tics: UTM Zone 14N WGS84 0 50 100 200 300

Feet 0 15 30 60 90

Meters Map Scale: 1:1,240 if printed on A landscape (11" x 8.5") sheet.

Soil Map may not be valid at this scale.

amwilliams Rectangle amwilliams Callout

PROJECT LOCATION

Area of Interest (AOI)

Soils Soil Rating Polygons

None

Very Rare

Rare

Occasional

Frequent

Very Frequent

Not rated or not available

Soil Rating Lines None

Very Rare

Rare

Occasional

Frequent

Very Frequent

Not rated or not available

Soil Rating Points None

Very Rare

Rare

Occasional

Frequent

Very Frequent

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: Brule and Buffalo Counties, South Dakota Survey Area Data: Version 24, Jun 4, 2020

Soil map units are labeled (as space allows) for map scales 1:50,000 or larger.

Date(s) aerial images were photographed: Apr 29, 2012—Feb 6, 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.

Flooding Frequency Class—Brule and Buffalo Counties, South Dakota

(23. Floodplains - Melita Rank)

Natural Resources Conservation Service

Web Soil Survey National Cooperative Soil Survey

5/11/2021

LoA Lowry silt loam, 0 to 3 percent slopes

None 4.0 57.4%

SoE Sully-Lowry silt loams, 9 to 25 percent slopes

None 3.0 42.6%

Totals for Area of Interest 6.9 100.0%

Description

Flooding is the temporary inundation of an area caused by overflowing streams, by runoff from adjacent slopes, or by tides. Water standing for short periods after rainfall or snowmelt is not considered flooding, and water standing in swamps and marshes is considered ponding rather than flooding.

Frequency is expressed as none, very rare, rare, occasional, frequent, and very frequent.

"None" means that flooding is not probable. The chance of flooding is nearly 0 percent in any year. Flooding occurs less than once in 500 years.

"Very rare" means that flooding is very unlikely but possible under extremely unusual weather conditions. The chance of flooding is less than 1 percent in any year.

"Rare" means that flooding is unlikely but possible under unusual weather conditions. The chance of flooding is 1 to 5 percent in any year.

"Occasional" means that flooding occurs infrequently under normal weather conditions. The chance of flooding is 5 to 50 percent in any year.

"Frequent" means that flooding is likely to occur often under normal weather conditions. The chance of flooding is more than 50 percent in any year but is less than 50 percent in all months in any year.

"Very frequent" means that flooding is likely to occur very often under normal weather conditions. The chance of flooding is more than 50 percent in all months of any year.

Rating Options

Aggregation Method: Dominant Condition

Component Percent Cutoff: None Specified

Tie-break Rule: More Frequent

Flooding Frequency Class—Brule and Buffalo Counties, South Dakota 23. Floodplains - Melita Rank

Natural Resources Conservation Service

Web Soil Survey National Cooperative Soil Survey

Flooding Frequency Class—Brule and Buffalo Counties, South Dakota 23. Floodplains - Melita Rank

Natural Resources Conservation Service

Web Soil Survey National Cooperative Soil Survey

(23. Floodplains - Ronald Rencountre)

Natural Resources Conservation Service

Web Soil Survey National Cooperative Soil Survey

12/29/2021

462820 462850 462880 462910 462940 462970 463000 463030 463060 463090

462790 462820 462850 462880 462910 462940 462970 463000 463030 463060 463090

44° 4' 38'' N

7'

2' ' W

44° 4' 38'' N

7'

9' ' W

44° 4' 32'' N

7'

2' ' W

44° 4' 32'' N

7'

9' ' W

N

Map projection: Web Mercator Corner coordinates: WGS84 Edge tics: UTM Zone 14N WGS84 0 50 100 200 300

Feet 0 20 40 80 120

Meters Map Scale: 1:1,400 if printed on A landscape (11" x 8.5") sheet.

Area of Interest (AOI)

Soils Soil Rating Polygons

None

Very Rare

Rare

Occasional

Frequent

Very Frequent

Not rated or not available

Soil Rating Lines None

Very Rare

Rare

Occasional

Frequent

Very Frequent

Not rated or not available

Soil Rating Points None

Very Rare

Rare

Occasional

Frequent

Very Frequent

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: Brule and Buffalo Counties, South Dakota Survey Area Data: Version 25, Sep 14, 2021

Soil map units are labeled (as space allows) for map scales 1:50,000 or larger.

Date(s) aerial images were photographed: Apr 29, 2012—Feb 6, 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.

Flooding Frequency Class—Brule and Buffalo Counties, South Dakota

(23. Floodplains - Ronald Rencountre)

Natural Resources Conservation Service

Web Soil Survey National Cooperative Soil Survey

12/29/2021

DeD Delmont loam, 6 to 15 percent slopes

None 3.5 44.0%

Or Orthents, loamy None 2.5 32.1%

OtA Orton loam, 0 to 2 percent slopes

None 1.2 15.7%

SsE Sully-Schamber complex, 9 to 25 percent slopes

None 0.6 8.1%

Totals for Area of Interest 7.8 100.0%

Description

Flooding is the temporary inundation of an area caused by overflowing streams, by runoff from adjacent slopes, or by tides. Water standing for short periods after rainfall or snowmelt is not considered flooding, and water standing in swamps and marshes is considered ponding rather than flooding.

Frequency is expressed as none, very rare, rare, occasional, frequent, and very frequent.

"None" means that flooding is not probable. The chance of flooding is nearly 0 percent in any year. Flooding occurs less than once in 500 years.

"Very rare" means that flooding is very unlikely but possible under extremely unusual weather conditions. The chance of flooding is less than 1 percent in any year.

"Rare" means that flooding is unlikely but possible under unusual weather conditions. The chance of flooding is 1 to 5 percent in any year.

"Occasional" means that flooding occurs infrequently under normal weather conditions. The chance of flooding is 5 to 50 percent in any year.

"Frequent" means that flooding is likely to occur often under normal weather conditions. The chance of flooding is more than 50 percent in any year but is less than 50 percent in all months in any year.

"Very frequent" means that flooding is likely to occur very often under normal weather conditions. The chance of flooding is more than 50 percent in all months of any year.

Flooding Frequency Class—Brule and Buffalo Counties, South Dakota 23. Floodplains - Ronald Rencountre

Natural Resources Conservation Service

Web Soil Survey National Cooperative Soil Survey

Component Percent Cutoff: None Specified

Tie-break Rule: More Frequent

Beginning Month: January

Ending Month: December

Flooding Frequency Class—Brule and Buffalo Counties, South Dakota 23. Floodplains - Ronald Rencountre

Natural Resources Conservation Service

Web Soil Survey National Cooperative Soil Survey

(23. Floodplains - Shannon Shields)

Natural Resources Conservation Service

Web Soil Survey National Cooperative Soil Survey

4/14/2021

464460 464470 464480 464490 464500 464510 464520

464460 464470 464480 464490 464500 464510 464520

44° 4' 28'' N

6'

8' ' W

44° 4' 28'' N

6'

5' ' W

44° 4' 25'' N

6'

8' ' W

44° 4' 25'' N

6'

5' ' W

N

Map projection: Web Mercator Corner coordinates: WGS84 Edge tics: UTM Zone 14N WGS84 0 20 40 80 120

Feet 0 5 10 20 30

Meters Map Scale: 1:428 if printed on A portrait (8.5" x 11") sheet.

Area of Interest (AOI)

Soils Soil Rating Polygons

None

Very Rare

Rare

Occasional

Frequent

Very Frequent

Not rated or not available

Soil Rating Lines None

Very Rare

Rare

Occasional

Frequent

Very Frequent

Not rated or not available

Soil Rating Points None

Very Rare

Rare

Occasional

Frequent

Very Frequent

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: Brule and Buffalo Counties, South Dakota Survey Area Data: Version 24, Jun 4, 2020

Soil map units are labeled (as space allows) for map scales 1:50,000 or larger.

Date(s) aerial images were photographed: Apr 29, 2012—Feb 6, 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.

Flooding Frequency Class—Brule and Buffalo Counties, South Dakota

(23. Floodplains - Shannon Shields)

Natural Resources Conservation Service

Web Soil Survey National Cooperative Soil Survey

ReA Ree loam, 0 to 3 percent slopes

None 0.9 100.0%

Totals for Area of Interest 0.9 100.0%

Description

Flooding is the temporary inundation of an area caused by overflowing streams, by runoff from adjacent slopes, or by tides. Water standing for short periods after rainfall or snowmelt is not considered flooding, and water standing in swamps and marshes is considered ponding rather than flooding.

Frequency is expressed as none, very rare, rare, occasional, frequent, and very frequent.

"None" means that flooding is not probable. The chance of flooding is nearly 0 percent in any year. Flooding occurs less than once in 500 years.

"Very rare" means that flooding is very unlikely but possible under extremely unusual weather conditions. The chance of flooding is less than 1 percent in any year.

"Rare" means that flooding is unlikely but possible under unusual weather conditions. The chance of flooding is 1 to 5 percent in any year.

"Occasional" means that flooding occurs infrequently under normal weather conditions. The chance of flooding is 5 to 50 percent in any year.

"Frequent" means that flooding is likely to occur often under normal weather conditions. The chance of flooding is more than 50 percent in any year but is less than 50 percent in all months in any year.

"Very frequent" means that flooding is likely to occur very often under normal weather conditions. The chance of flooding is more than 50 percent in all months of any year.

Rating Options

Aggregation Method: Dominant Condition

Component Percent Cutoff: None Specified

Tie-break Rule: More Frequent

Beginning Month: January

Ending Month: December

Flooding Frequency Class—Brule and Buffalo Counties, South Dakota 23. Floodplains - Shannon Shields

Natural Resources Conservation Service

Web Soil Survey National Cooperative Soil Survey