Soil Data Explorer - ALTAMONT

Official Series Description

Lab Data Summary

Aggregate lab data for the ALTAMONT soil series. This aggregation is based on all pedons with a current taxon name of ALTAMONT, and applied along 1-cm thick depth slices. Solid lines are the slice-wise median, bounded on either side by the interval defined by the slice-wise 5th and 95th percentiles. The median is the value that splits the data in half. Five percent of the data are less than the 5th percentile, and five percent of the data are greater than the 95th percentile. Values along the right hand side y-axis describe the proportion of pedon data that contribute to aggregate values at this depth. For example, a value of "90%" at 25cm means that 90% of the pedons correlated to ALTAMONT were used in the calculation. Source: KSSL snapshot (updated 2020-03-18). Methods used to assemble the KSSL snapshot used by SoilWeb / SDE

Pedons used in the lab summary:

MLRA	Lab ID	Pedon ID	Taxonname	CI	NSSL / NASIS Reports	Link To SoilWeb GMap
15	UCD5811002	58-CA-11-002	ALTAMONT	3	Primary | Supplementary | Taxonomy | Pedon | Water Retention | Correlation | Andic Soil Properties	39.5712433,-122.3671188
15	UCD5852050	58-CA-52-050	ALTAMONT	3	Primary | Supplementary | Taxonomy | Pedon | Water Retention | Correlation | Andic Soil Properties	40.223526,-122.6500244
15	85P0851	85CA021003	Altamont	7	Primary | Supplementary | Taxonomy | Pedon | Water Retention | Correlation | Andic Soil Properties	39.5472221,-122.351387
15	94P0049	93CA011001	Altamont	7	Primary | Supplementary | Taxonomy | Pedon | Water Retention | Correlation | Andic Soil Properties	39.3455556,-122.3230556
15	94P0051	93CA011003	Altamont	7	Primary | Supplementary | Taxonomy | Pedon | Water Retention | Correlation | Andic Soil Properties	39.3455556,-122.3230556
15	94P0052	93CA011004	Altamont	6	Primary | Supplementary | Taxonomy | Pedon | Water Retention | Correlation | Andic Soil Properties	39.3455556,-122.3230556
15	40A3082	S1958CA001003	ALTAMONT	5	Primary | Supplementary | Taxonomy | Pedon | Water Retention | Correlation | Andic Soil Properties	37.7463875,-121.6916656
15	40A3083	S1958CA001004	ALTAMONT	5	Primary | Supplementary | Taxonomy | Pedon | Water Retention | Correlation | Andic Soil Properties	37.7486115,-121.7088852
17	UCD5411007	54-CA-11-007	ALTAMONT	2	Primary | Supplementary | Taxonomy | Pedon | Water Retention | Correlation | Andic Soil Properties	39.6042557,-122.2779541
17	UCD5611027	56-CA-11-027	ALTAMONT	4	Primary | Supplementary | Taxonomy | Pedon | Water Retention | Correlation | Andic Soil Properties	39.7299728,-122.2761536
17	UCD5852049	58-CA-52-049	ALTAMONT	3	Primary | Supplementary | Taxonomy | Pedon | Water Retention | Correlation | Andic Soil Properties	40.0107765,-122.3787994
17	85P0849	85CA021001	Altamont	7	Primary | Supplementary | Taxonomy | Pedon | Water Retention | Correlation | Andic Soil Properties	39.6186104,-122.3388901
17	85P0850	85CA021002	Altamont	7	Primary | Supplementary | Taxonomy | Pedon | Water Retention | Correlation | Andic Soil Properties	39.6352768,-122.2388916

Water Balance

Monthly water balance estimated using a leaky-bucket style model for the ALTAMONT soil series. Monthly precipitation (PPT) and potential evapotranspiration (PET) have been estimated from the 50th percentile of gridded values (PRISM 1981-2010) overlapping with the extent of SSURGO map units containing each series as a major component. Monthly PET values were estimated using the method of Thornthwaite (1948). These (and other) climatic parameters are calculated with each SSURGO refresh and provided by the fetchOSD function of the soilDB package. Representative water storage values (“AWC” in the figures) were derived from SSURGO by taking the 50th percentile of profile-total water storage (sum[awc_r * horizon thickness]) for each soil series. Note that this representation of “water storage” is based on the average ability of most plants to extract soil water between 15 bar (“permanent wilting point”) and 1/3 bar (“field capacity”) matric potential. Soil moisture state can be roughly interpreted as “dry” when storage is depleted, “moist” when storage is between 0mm and AWC, and “wet” when there is a surplus. Clearly there are a lot of assumptions baked into this kind of monthly water balance. This is still a work in progress.

Sibling Summary

Siblings are those soil series that occur together in map units, in this case with the ALTAMONT series. Sketches are arranged according to their subgroup-level taxonomic structure. Source: SSURGO snapshot (updated 2024-02-21), parsed OSD records (updated 2023-10-06) and snapshot of SC database (updated 2023-10-02).

Select annual climate data summaries for the ALTAMONT series and siblings. Series are sorted according to hierarchical clustering of median values. Source: SSURGO map unit geometry and 1981-2010, 800m PRISM data (updated 2023-10-09).

Geomorphic description summaries for the ALTAMONT series and siblings. Series are sorted according to hierarchical clustering of proportions and relative hydrologic position within an idealized landform (e.g. top to bottom). Most soil series (SSURGO components) are associated with a hillslope position and one or more landform-specific positions: hills, mountain slopes, terraces, and/or flats. Proportions can be interpreted as an aggregate representation of geomorphic membership. The values printed to the left (number of component records) and right (Shannon entropy) of stacked bars can be used to judge the reliability of trends. Small Shannon entropy values suggest relatively consistent geomorphic association, while larger values suggest lack thereof. Source: SSURGO component records (updated 2023-10-04).

Competing Series

Soil series competing with ALTAMONT share the same family level classification in Soil Taxonomy. Source: parsed OSD records (updated 2023-10-06) and snapshot of the SC database (updated 2023-10-02).

Select annual climate data summaries for the ALTAMONT series and competing. Series are sorted according to hierarchical clustering of median values. Source: SSURGO map unit geometry and 1981-2010, 800m PRISM data (updated 2023-10-09).

Geomorphic description summaries for the ALTAMONT series and competing. Series are sorted according to hierarchical clustering of proportions and relative hydrologic position within an idealized landform (e.g. top to bottom). Proportions can be interpreted as an aggregate representation of geomorphic membership. Most soil series (SSURGO components) are associated with a hillslope position and one or more landform-specific positions: hills, mountain slopes, terraces, and/or flats. The values printed to the left (number of component records) and right (Shannon entropy) of stacked bars can be used to judge the reliability of trends. Shannon entropy values close to 0 represent soil series with relatively consistent geomorphic association, while values close to 1 suggest lack thereof. Source: SSURGO component records (updated 2023-10-04).

Soil series sharing subgroup-level classification with ALTAMONT, arranged according to family differentiae. Hovering over a series name will print full classification and a small sketch from the OSD. Source: snapshot of SC database (updated 2023-10-02).

Block Diagrams

Click a link below to display the diagram. Note that these diagrams may be from multiple survey areas.

1. CA-2010-08-30-05 | Colusa County - 2006

   Typical pattern of soils on the western edge of the Sacramento Valley and on the Coast Range foothills (Soil Survey of Colusa County, California).

2. CA-2012-05-08-17 | Alameda Area - March 1966

   The relationship of geologic formations, landforms, and soil series in the Alameda Area (Soil Survey of Alameda Area, California; March, 1966).

Map Units

Map units containing ALTAMONT as a major component. Limited to 250 records.

Map Unit Name	Symbol	Map Unit Area (ac)	Map Unit Key	National Map Unit Symbol	Soil Survey Area	Publication Date	Map Scale
Sehorn-Altamont complex, 30 to 50 percent slopes	218	11768	461600	2vf9f	ca011	1999	1:24000
Altamont-Sehorn complex, 15 to 30 percent slopes	215	5174	461598	hhb8	ca011	1999	1:24000
Altamont-Sehorn complex, 9 to 15 percent slopes	216	3520	461599	hhb9	ca011	1999	1:24000
Millsholm-Altamont-Rock outcrop complex, 5 to 15 percent slopes	253	3151	461610	hhbn	ca011	1999	1:24000
Altamont silty clay, 5 to 9 percent slopes	220	3004	461602	hhbd	ca011	1999	1:24000
Contra Costa-Altamont association, 30 to 50 percent slopes	241	618	461608	2vf93	ca011	1999	1:24000
Altamont silty clay, 9 to 15 percent slopes	221	607	461603	hhbf	ca011	1999	1:24000
Sehorn-Millsholm-Altamont complex, 15 to 30 percent slopes	329	228	461629	hhc8	ca011	1999	1:24000
Millsholm-Altamont complex, 15 to 30 percent slopes	261	129	461615	hhbt	ca011	1999	1:24000
Altamont-Fontana complex, 30 to 50 percent slopes	AcF	27475	455761	h97z	ca013	1973	1:24000
Altamont clay, 15 to 30 percent slopes, MLRA 15	AbE	16985	455760	2w626	ca013	1973	1:24000
Altamont-Fontana complex, 50 to 75 percent slopes	AcG	4990	455762	h980	ca013	1973	1:24000
Altamont clay, 9 to 15 percent slopes, MLRA 15	AbD	4410	455759	2w62c	ca013	1973	1:24000
Fontana-Altamont complex	Fd	1165	455795	h992	ca013	1973	1:24000
Altamont clay, 3 to 15 percent slopes	AaC	6732	458558	hd56	ca021	1961	1:20000
Millsholm-Altamont-Rock outcrop complex, 10 to 55 percent slopes, severely eroded, MLRA 15	AkE3	4917	458575	2y0gv	ca021	1961	1:20000
Altamont soils, 30 to 65 percent slopes	AdE	3909	458566	2vf96	ca021	1961	1:20000
Nacimiento-Altamont association, 10 to 30 percent slopes	NfD	2756	458759	hdcp	ca021	1961	1:20000
Altamont soils, 15 to 30 percent slopes	AdD	2381	458565	hd5f	ca021	1961	1:20000
Shedd-Altamont association, 10 to 30 percent slopes	SgD	1881	458843	hdgd	ca021	1961	1:20000
Altamont-Contra Costa clays, 15 to 30 percent slopes	AhD	1259	458573	hd5p	ca021	1961	1:20000
Altamont-Nacimiento association, 3 to 15 percent slopes	AmC	1185	458576	hd5s	ca021	1961	1:20000
Altamont-Rocky gullied land complex, 15 to 45 percent slopes	AgE	920	458571	hd5m	ca021	1961	1:20000
Altamont-Gullied land complex, 30 to 50 percent slopes	AfE	770	458568	hd5j	ca021	1961	1:20000
Altamont-Gullied land complex, shallow, 30 to 65 percent slopes	AfsE	724	458570	2vf98	ca021	1961	1:20000
Altamont-Shedd association, 3 to 15 percent slopes	AnC	701	458577	hd5t	ca021	1961	1:20000
Altamont rocky clay loam, 15 to 30 percent slopes	AcD	577	458562	hd5b	ca021	1961	1:20000
Altamont-Contra Costa clays, 30 to 50 percent slopes	AhE	529	458574	hd5q	ca021	1961	1:20000
Altamont rocky clay loam, 30 to 50 percent slopes	AcE	495	458563	hd5c	ca021	1961	1:20000
Nacimiento-Altamont-Gullied land complex, 15 to 30 percent slopes	NgD	456	458760	hdcq	ca021	1961	1:20000
Altamont clay, 15 to 30 percent slopes, MLRA 17	AaD	320	3356327	318th	ca021	1961	1:20000
Altamont soils, 3 to 15 percent slopes	AdC	311	458564	hd5d	ca021	1961	1:20000
Altamont-Gullied land complex, 10 to 30 percent slopes	AfD	228	458567	hd5h	ca021	1961	1:20000
Altamont-Gullied land complex, shallow, 10 to 30 percent slopes	AfsD	219	458569	2vf97	ca021	1961	1:20000
Altamont-Contra Costa clays, 8 to 15 percent slopes	AhC	214	458572	hd5n	ca021	1961	1:20000
Altamont gravelly clay, 3 to 15 percent slopes	AbC	150	458561	hd59	ca021	1961	1:20000
Altamont clay, 0 to 3 percent slopes	AaA	119	458557	hd55	ca021	1961	1:20000
Shedd-Altamont-Gullied land complex, 8 to 15 percent slopes	ShC	96	458844	hdgf	ca021	1961	1:20000
Altamont clay, 30 to 50 percent slopes, warm MAAT, MLRA 15	AaE	42	458560	2w629	ca021	1961	1:20000
Vaquero and Altamont clays, 15 to 50 percent slopes, MLRA 15	169	9126	461830	2w632	ca031	1980	1:24000
Vaquero and Altamont clays, 50 to 75 percent slopes, MLRA 15	170	1809	461831	2w633	ca031	1980	1:24000
Vaquero-Altamont-Millsholm complex, 15 to 50 percent sl opes	171	1545	461832	hhkt	ca031	1980	1:24000
Altamont clay, 30 to 50 percent slopes eroded	AcF2so	11	816078	wd63	ca055	1974	1:24000
Altamont-Diablo clays, 9 to 30 percent slopes	AmE2so	2	816079	wd64	ca055	1974	1:24000
Altamont-Diablo clays, 2 to 9 percent slopes	AmC	8384	456055	h9kg	ca095	1969	1:24000
Altamont clay, 9 to 30 percent slopes	AcE	7901	456051	h9kb	ca095	1969	1:24000
Altamont-San Ysidro-San Benito complex, 2 to 9 percent slopes	AlC	6346	456053	h9kd	ca095	1969	1:24000
Altamont-San Ysidro-San Benito complex, 9 to 30 percent slopes	AlE	4191	456054	h9kf	ca095	1969	1:24000
Altamont clay, 2 to 9 percent slopes	AcC	4156	456050	h9k9	ca095	1969	1:24000
Altamont-Diablo clays, 9 to 30 percent slopes	AmE2	2725	456056	h9kh	ca095	1969	1:24000
Altamont clay, 30 to 50 percent slopes eroded	AcF2	2648	456052	h9kc	ca095	1969	1:24000
Altamont-Dibble complex, 9 to 30 percent slopes	101	2036	459311	hdyh	ca101	1984	1:24000
Altamont-Dibble complex, 30 to 50 percent slopes	102	1222	459312	hdyj	ca101	1984	1:24000
Sehorn-Altamont complex, 15 to 30 percent slopes	305scl		2483676	2pcgl	ca609	1963	1:20000
Altamont-Fontana complex, 30 to 50 percent slopes	AcFcc		801702	vx7c	ca609	1963	1:20000
Fontana-Altamont complex	Fdcc		801712	vx7p	ca609	1963	1:20000
Altamont clay, 15 to 30 percent slopes, MLRA 15	AaD	9273	456558	2w626	ca609	1963	1:20000
Altamont clay, moderately deep, 30 to 45 percent slopes, eroded	AmE2	8460	456559	hb2q	ca609	1963	1:20000
Altamont rocky clay, moderately deep, 7 to 30 percent slopes	ArD	5546	456561	hb2s	ca609	1963	1:20000
Altamont clay, moderately deep, 45 to 75 percent slopes, eroded	AmF2	2858	456560	hb2r	ca609	1963	1:20000
Altamont clay, 3 to 15 percent slopes	AaC	1006	456557	hb2n	ca609	1963	1:20000
Altamont rocky clay, moderately deep, 7 to 30 percent slopes	ArDaa		801695	vx74	ca610	1975	1:24000
Xerorthents-Altamont complex, 30 to 50 percent slopes	157	1892	456710	hb7l	ca610	1975	1:24000
Altamont clay, 30 to 50 percent slopes, MLRA 15	102	340	456655	2w628	ca610	1975	1:24000
Altamont clay, 15 to 30 percent slopes, MLRA 15	101	232	456654	2w626	ca610	1975	1:24000
Altamont clay, 5 to 15 percent slopes	100	89	456653	hb5r	ca610	1975	1:24000
Altamont clay, 30 to 50 percent slopes, warm MAAT, MLRA 20	AtF	3846	456726	2w62b	ca638	1967	1:24000
Altamont clay, 15 to 30 percent slopes, warm MAAT, MLRA 20	AtE	2424	456724	2w627	ca638	1967	1:24000
Altamont clay, 9 to 15 percent slopes, warm MAAT, MLRA 20	AtD	2159	456722	2w62d	ca638	1967	1:24000
Altamont clay, 5 to 9 percent slopes	AtC	2063	456721	hb7y	ca638	1967	1:24000
Altamont clay, 15 to 30 percent slopes, eroded	AtE2	871	456725	hb82	ca638	1967	1:24000
Altamont clay, 9 to 15 percent slopes, eroded	AtD2	565	456723	hb80	ca638	1967	1:24000
Alo-Altamont complex, 15 to 30 percent slopes	305	8371	1882923	216bg	ca641	2009	1:24000
Alo-Altamont complex, 30 to 50 percent slopes	306	1931	1882922	216bf	ca641	2009	1:24000
Urbanland-Altamont-Alo complex, 9 to 15 percent slopes	309	993	2425950	2mfdg	ca641	2009	1:24000
Urbanland-Altamont-Alo complex, 15 to 30 percent slopes	314	913	2425953	2mfdk	ca641	2009	1:24000
Alo-Altamont complex, 9 to 15 percent slopes	385	381	2425958	2mfdq	ca641	2009	1:24000
Nacimiento-Altamont complex, 10 to 30 percent slopes, eroded	NcD2	6488	460866	hgkn	ca645	1961	1:20000
Nacimiento-Altamont complex, 30 to 50 percent slopes, eroded	NcE2	4155	460867	hgkp	ca645	1961	1:20000
Altamont clay, terrace, 0 to 3 percent slopes	AcA	3150	460673	hgcf	ca645	1961	1:20000
Sehorn-Altamont clays, 30 to 50 percent slopes	ShE	3006	460923	hgmh	ca645	1961	1:20000
Nacimiento-Altamont complex, 3 to 10 percent slopes	NcB	2329	460864	hgkl	ca645	1961	1:20000
Nacimiento-Altamont complex, 10 to 30 percent slopes	NcD	1474	460865	hgkm	ca645	1961	1:20000
Altamont clay, terrace, 3 to 10 percent slopes	AcB	1120	460674	hgcg	ca645	1961	1:20000
Altamont clay, 30 to 50 percent slopes, warm MAAT, MLRA 15	AbE	1051	460672	2w629	ca645	1961	1:20000
Altamont clay, terrace, 30 to 50 percent slopes	AcE	860	460676	hgcj	ca645	1961	1:20000
Altamont clay, 10 to 30 percent slopes	AbD	355	460671	hgcc	ca645	1961	1:20000
Altamont clay, terrace, 10 to 30 percent slopes	AcD	240	460675	hgch	ca645	1961	1:20000
Altamont clay, 30 to 50 percent slopes, MLRA 15	AcF	1156	456961	2w628	ca646	1967	1:24000
Altamont clay, 15 to 30 percent slopes, MLRA 15	AcE	642	456960	2w626	ca646	1967	1:24000
Altamont clay, 50 to 75 percent slopes, eroded	AcG2	161	456962	hbhq	ca646	1967	1:24000
Altamont variant-Hytop , 30 to 50 percent slopes	105	1460	462757	hjjn	ca647	1984	1:24000
Altamont-Roacha-Borreguero association, 15 to 50 percent slopes	712	18106	467131	hp2r	ca653	2000	1:24000
Vaquero-Altamont complex, 15 to 50 percent slopes	782	1495	467144	hp35	ca653	2000	1:24000
Altamont clay, 5 to 8 percent slopes	822	549	467148	hp39	ca653	2000	1:24000
Vaquero-Altamont complex, 50 to 75 percent slopes	783	391	467145	hp36	ca653	2000	1:24000
Vaquero-Altamont-Millsholm complex, 15 to 50 percent sl opes	171ki		2218154	2dg5c	ca666	1983	1:24000
Vaquero and Altamont clays, 15 to 50 percent slopes, MLRA 15	241	442	463786	2w632	ca666	1983	1:24000
Vaquero and Altamont clays, 50 to 75 percent slopes, MLRA 15	242	218	463787	2w633	ca666	1983	1:24000
Altamont cobbly clay, 8 to 35 percent slopes	AbF	813	458135	hcqk	ca679	1967	1:15840
Altamont clay, 25 to 50 percent slopes	AaF	316	458134	hcqj	ca679	1967	1:15840
Altamont clay, 5 to 15 percent slopes	AaD	267	458132	hcqg	ca679	1967	1:15840
Altamont clay, 15 to 25 percent slopes, eroded	AaE2	195	458133	hcqh	ca679	1967	1:15840
Diablo-Altamont-Henneke families association, 10 to 60 percent slopes	5	15134	465318	hm68	ca772	1981	1:24000

Map of Series Extent

Approximate geographic distribution of the ALTAMONT soil series. To learn more about how this distribution was mapped, or to compare this soil series extent to others, use the Series Extent Explorer (SEE) application. Source: generalization of SSURGO geometry (updated 2023-10-04).