WSP00945

• File Number: 8442.400
• Description: Missouri Basin - Pick Sloan Project - Reports
• State: CO
• Basin: South Platte
• Water Division: 1
• Date: 2/28/1985
• Author: DoI, BoR
• Title: Lake Andes - Wagner Unit Planning Report / draft Enviromental Statement
• Water Supply Pro - Doc Type: Report/Study

Acres,

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The following tabulation summarizes the land classes:

C las s 1
Class 2
Class 3

Arable

Class 60'
Class 6
R igh t s.o f-W ay

TOTAL

51,362.5 '
18,778.6
5,178.2

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75,319.3

1,172.9
18,564.7
3,218.5

98,275.4

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The irrigable area comprises that portion of the arable area which will be
provided water supply and necessary drai~age facilitie~ under ultimate
development' of the project. The irdgable area is ident ified by cons ide ring
limitations imposed by water supply, cost of facilities and service to spe-
cific tracts, lands required for additional rights-of-way, other' nonproduc-
tive purposes, and project formulation cr,iteria which include' the
requirement that benefits exceed costs;

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Land classification specifications used in the 1981-84 survey are presented
in Table 1.

The main soil deficiencies delineated in ,the survey area are fine soil

textures (h factor) and moderate salinity! (s factor). Topographic defi-
,

ciencies delineated included cover removal (c' fac'tor), steep slopes

(g factor), a few areas of stoniriess (r factor), and small field size

(j factor). The only land classification: drainage deficiency mapped was

for surface outlet exca'vation costs (0 fa:ctor). Nondrainable lands within

a cost limitation will be delineated with! a 60 symbol. Class 6D nonarable
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lands are presently not considered drainaple under' the current economic

restraints for sustained irrigation. Problems may be the lack of a

suitable outlet for drains, or the materials so slowly permeable that

closely spaced subsurface drains are required with their associated costs

too high to be economically feasible.

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