USDA SSURGO COUNTY SOIL REFERENCE

Mobile County, Alabama Soil Summary

This page summarizes USDA SSURGO mapped soil information for Mobile County, Alabama.

Mapped Land Coverage

99.96%1,051,792.55 mapped acres of 1,052,193.35 Census land acres

Coverage measures mapped SSURGO intersection with Census land geometry. It does not mean that every parcel or point has complete soil information.

Soil at a Glance

Largest mapped soil unit

Water

Symbol: W • 24.85% of mapped area

Largest estimated component

Water

267,188.74 acres (25.4% of mapped area)

Mapped units & components

198 mapped soil units

Top 15 shown below · 91 component series

Dominant drainage class

Unknown / Unmapped

Highest acreage drainage class

Dominant hydrologic group

Group Unknown / Unmapped

Runoff potential classification

Weighted average slope

4.8%

Terrain slope analysis

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Top Mapped Soil Units

Showing the 15 largest mapped units, representing 60.93% of mapped soil area.

Symbol	Map Unit Name	Mapped Acres	% of Mapped Area
W	Water	261,326.91	24.85%
WaB	Wadley loamy fine sand, 0 to 5 percent slopes	49,970.11	4.75%
WhD	Wadley-Heidel complex, 8 to 15 percent slopes	47,153.17	4.48%
MbF2	Maubila-Olla-Rattlesnake Forks complex, 8 to 35 percent slopes, moderately eroded	47,104.56	4.48%
WhE	Wadley-Heidel complex, 15 to 25 percent slopes	39,471.25	3.75%
JBA	Johnston, Bibb and Pamlico soils, 0 to 1 percent slopes, frequently flooded	36,247.66	3.45%
HeB	Heidel fine sandy loam, 2 to 5 percent slopes	28,235.5	2.68%
StA	Stallings (gulf)-Bayou complex, 0 to 2 percent slopes	20,510.97	1.95%
UbA	Urban land, 0 to 8 percent slopes	16,670.13	1.58%
WhC	Wadley-Heidel complex, 2 to 8 percent slopes	16,153.43	1.54%
BuC	Benndale-Urban land complex, 0 to 8 percent slopes	16,005.53	1.52%
JPA	Johnston, Pamlico and Dorovan soils, 0 to 1 percent slopes, frequently flooded	15,867.37	1.51%
CtD	Chatom-Toinette-Rutan complex, 5 to 15 percent slopes	15,465.92	1.47%
WaC	Wadley loamy fine sand, 5 to 8 percent slopes	15,417.32	1.47%
WuC	Wadley-Urban land complex, 0 to 8 percent slopes	15,253.31	1.45%

W24.85% of mapped area

Water

Mapped Area261,326.91 acres

Rank#1 of 198 in county

WaB4.75% of mapped area

Wadley loamy fine sand, 0 to 5 percent slopes

Mapped Area49,970.11 acres

Rank#2 of 198 in county

WhD4.48% of mapped area

Wadley-Heidel complex, 8 to 15 percent slopes

Mapped Area47,153.17 acres

Rank#3 of 198 in county

MbF24.48% of mapped area

Maubila-Olla-Rattlesnake Forks complex, 8 to 35 percent slopes, moderately eroded

Mapped Area47,104.56 acres

Rank#4 of 198 in county

WhE3.75% of mapped area

Wadley-Heidel complex, 15 to 25 percent slopes

Mapped Area39,471.25 acres

Rank#5 of 198 in county

JBA3.45% of mapped area

Johnston, Bibb and Pamlico soils, 0 to 1 percent slopes, frequently flooded

Mapped Area36,247.66 acres

Rank#6 of 198 in county

HeB2.68% of mapped area

Heidel fine sandy loam, 2 to 5 percent slopes

Mapped Area28,235.5 acres

Rank#7 of 198 in county

StA1.95% of mapped area

Stallings (gulf)-Bayou complex, 0 to 2 percent slopes

Mapped Area20,510.97 acres

Rank#8 of 198 in county

UbA1.58% of mapped area

Urban land, 0 to 8 percent slopes

Mapped Area16,670.13 acres

Rank#9 of 198 in county

WhC1.54% of mapped area

Wadley-Heidel complex, 2 to 8 percent slopes

Mapped Area16,153.43 acres

Rank#10 of 198 in county

BuC1.52% of mapped area

Benndale-Urban land complex, 0 to 8 percent slopes

Mapped Area16,005.53 acres

Rank#11 of 198 in county

JPA1.51% of mapped area

Johnston, Pamlico and Dorovan soils, 0 to 1 percent slopes, frequently flooded

Mapped Area15,867.37 acres

Rank#12 of 198 in county

CtD1.47% of mapped area

Chatom-Toinette-Rutan complex, 5 to 15 percent slopes

Mapped Area15,465.92 acres

Rank#13 of 198 in county

WaC1.47% of mapped area

Wadley loamy fine sand, 5 to 8 percent slopes

Mapped Area15,417.32 acres

Rank#14 of 198 in county

WuC1.45% of mapped area

Wadley-Urban land complex, 0 to 8 percent slopes

Mapped Area15,253.31 acres

Rank#15 of 198 in county

Estimated Soil Components

Showing the 15 largest estimated component series. Component acreages are estimated from SSURGO map-unit component percentages (comppct_r) applied to spatially measured map-unit acreage.

Component	Drainage Class	Hydrologic Group	Estimated Acres	% of Mapped Area
Water	Unspecified	Unspecified	267,188.74	25.4%
Wadley	Somewhat excessively drained	A	127,622.18	12.13%
Heidel	Well drained	B, A	58,846.38	5.59%
Urban land	Unspecified	Unspecified	37,489.6	3.56%
Benndale	Well drained	B	36,091.7	3.43%
Bibb	Poorly drained	A/D, C/D, B/D	27,977.69	2.66%
Johnston	Very poorly drained	A/D, C/D	26,954.44	2.56%
Rattlesnake Forks	Somewhat excessively drained	B, A	25,923.26	2.46%
Bama	Well drained	A	24,134.32	2.29%
Maubila	Moderately well drained	D	21,197.05	2.02%
Malbis	Well drained	C, B	20,082.24	1.91%
Smithton	Poorly drained	D, C/D, B/D	17,606.86	1.67%
Pamlico	Very poorly drained	A/D	16,496.39	1.57%
Bayou	Poorly drained	A/D	15,808.62	1.5%
Atmore	Poorly drained	A/D, B/D	15,719.36	1.49%

Component acreage is estimated from SSURGO map-unit component percentages. Component values are not independently mapped polygon boundaries.

Water

25.4%

Estimated Acres267,188.74

Drainage ClassUnspecified

Hydrologic GroupUnspecified

Wadley

12.13%

Estimated Acres127,622.18

Drainage ClassSomewhat excessively drained

Hydrologic GroupA

Heidel

5.59%

Estimated Acres58,846.38

Drainage ClassWell drained

Hydrologic GroupB, A

Urban land

3.56%

Estimated Acres37,489.6

Drainage ClassUnspecified

Hydrologic GroupUnspecified

Benndale

3.43%

Estimated Acres36,091.7

Drainage ClassWell drained

Hydrologic GroupB

Bibb

2.66%

Estimated Acres27,977.69

Drainage ClassPoorly drained

Hydrologic GroupA/D, C/D, B/D

Johnston

2.56%

Estimated Acres26,954.44

Drainage ClassVery poorly drained

Hydrologic GroupA/D, C/D

Rattlesnake Forks

2.46%

Estimated Acres25,923.26

Drainage ClassSomewhat excessively drained

Hydrologic GroupB, A

Bama

2.29%

Estimated Acres24,134.32

Drainage ClassWell drained

Hydrologic GroupA

Maubila

2.02%

Estimated Acres21,197.05

Drainage ClassModerately well drained

Hydrologic GroupD

Malbis

1.91%

Estimated Acres20,082.24

Drainage ClassWell drained

Hydrologic GroupC, B

Smithton

1.67%

Estimated Acres17,606.86

Drainage ClassPoorly drained

Hydrologic GroupD, C/D, B/D

Pamlico

1.57%

Estimated Acres16,496.39

Drainage ClassVery poorly drained

Hydrologic GroupA/D

Bayou

1.5%

Estimated Acres15,808.62

Drainage ClassPoorly drained

Hydrologic GroupA/D

Atmore

1.49%

Estimated Acres15,719.36

Drainage ClassPoorly drained

Hydrologic GroupA/D, B/D

Component acreage is estimated from SSURGO map-unit component percentages. Component values are not independently mapped polygon boundaries.

Drainage Class Distribution

Unknown / Unmapped28.97%

304,688.58 acres

Well drained18.81%

197,836.85 acres

Somewhat excessively drained15.49%

162,933.02 acres

Poorly drained9.04%

95,080.99 acres

Very poorly drained8.62%

90,677.7 acres

Moderately well drained7.4%

77,844.16 acres

Somewhat poorly drained3.19%

33,593.12 acres

Excessively drained0.44%

4,665.76 acres

Hydrologic Soil Group Distribution

Group Unknown / Unmapped29.92%

314,669.4 acres

Group A24.09%

253,405.08 acres

Group C/D9.45%

99,444.73 acres

Group B/D7.53%

79,179.17 acres

Group B6.75%

71,018.24 acres

Group A/D5.82%

61,203.21 acres

Group C4.87%

51,188.42 acres

Group D3.54%

37,211.92 acres

Hydrologic soil groups are USDA/NRCS classifications related to runoff potential under specified soil conditions. They are not a property-level flood-risk rating.

Slope Characteristics

Weighted Average Slope: 4.8%

Nearly Level (0-2%)32.69%

343,868.34 acres

Gently Sloping (2-8%)20.23%

212,799.86 acres

Moderately Sloping (8-15%)10.64%

111,884 acres

Steep (15-30%)3%

31,579.24 acres

Very Steep (>30%)0%

0 acres

Unspecified Slope25.4%

267,188.74 acres