WSP05537

• File Number: 8443.100
• Description: Narrows Unit - Project Description
• State: CO
• Basin: South Platte
• Water Division: 1
• Date: 1/1/1967
• Title: Report on the Narrows Unit Colorado South Platte Division Missouri River Basin Project part 1
• Water Supply Pro - Doc Type: Report/Study

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Pro,iect Lands

40 percent of the irrigable area, being placed in class 2. Class 2
lands have a composite productivity potential that is significantly
lower than that of the class 1 lands. To achieve maximum efficiency
in water utilization or to provide adequate farm drainage,
development work with costs ranging from nominal sums to $70 per
acre will be required.

Of the total class 2 lands, 39,840 acres are smooth and nearly
level. These lands are free of topographic limitations, but because
of coarse-textured, moderately shallow, or saline soils, production
on 96 percent of these lands will be only moderately high. For the
remaining 4 percent of the class 2 lands with nearly ideal topography,
the subsurface drainage is inadequate, and drainage works, estimated
to require moderate costs, are recommended. In case the drainage
works are not installed, production on these lands will also be only
moderately high.

Class 2 lands with correctable topographic limitations total
24,735 acres. These lands slope less than 3 percent but are
undulating. The soils are deep and medium textured except for minor
areas of sandy loam. Grading these lands to eliminate the undulations
is recommended. This development work, which would facilitate
spreading the water, could be accomplished at moderate costs.
Production from these lands, although high, will be slightly below
that of the class 1 lands,

Class 2 lands totaling 2,820 acres have topographic limitations
that are not corre~table, These lands lie on slopes ranging from
3 to 6 percent. Their soils are mainly medium textured and moderately
deep. In irrigating these lands, care should be exercised to keep
soil erosion at a minimum. Development work to be accomplished is
minor and can be accomplished at low cost. Production is anticipated
to be moderately high.

Class 3

Lands totaling 34,820 acres, or 21 percent of the irrigable
area, were assigned to class 3, These lands have limitations similar
to those of the class 2 lands, but the severity of the limitations is
greater.

Of the class 3 lands, 15,905 acres are smooth and nearly level,
About 84 percent of these lands have deep soils that are medium and
fine textured, They are potentially capable of moderately high
production, but in order to reach their full potential, farm drainage

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