FLOOD09522

• County: Logan
• Community: Sterling, Atwood
• Basin: South Platte
• Title: Pawnee Creek Flood Mitigation, City of Sterling, Town of Atwood and Logan County
• Date: 7/1/1999
• Prepared For: Logan County
• Prepared By: URS Greiner Woodward Clyde
• Floodplain - Doc Type: Flood Mitigation/Flood Warning/Watershed Restoration

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APPEND lIB

Soil Mapping Unit Descriptions

The AIda loam soils are deep, somewhat poorly drained, nearly level soils found on low terraces
and bottomlands. They are subject to occasional flooding during late spring and early summer,
and the permeability is moderate. Available water capacity is moderate, surface runoff is slow,
and the erosion hazard is slight. These soils are used mainly as irrigated cropland, with small
areas used for grazing. Wind breaks and environmental plantings are generally well suited to
these soils. The AIda loam soils are important soils for wildlife because of their intensive use for
cropland and their position in relation to the bottom lands of the South Platte River. Their
primary value for wildlife species is in the food they produce, which wildlife utilize while using
the riverbottom areas for cover.

The Fluvaquentic HapIaquolls soils are deep, poorly drained, nearly level soils found on
bottomlands along the South Platte River. They are subject to frequent flooding during spring
and summer months, and a moderate saline condition is common. These soils are used mainly
for grazing. Wind breaks and environmental plantings are generally difficult to establish because
of frequent flooding and the high water table. These soils are valuable for openland, wetland,
and rangeland \vildlife. Wetland wildlife, especially waterfowl, utilize the wetland plants for
nesting, protective cover, and some food. Openland and rangeland wildlife use these areas for
cover and nesting.

The FIuvaquents soils are deep, somewhat poorly drained and poorly drained, nearly level soils
formed in recent alluvial deposits bordering the South Platte River Channel. They are subject to
frequent flooding during spring and summer months. These soils are used entirely for limited
livestock grazing and wildlife. These soils are valuable for wetland and rangeland wildlife.
Wetland wildlife, especially waterfowl, utilize the wetland plants for nesting, protective cover,
and some food. Openland and rangeland wildlife use these areas for cover and nesting.

The GIenberg fine sandy loam soils are deep, well-drained, nearly level to gently sloping soil
found on low terraces and flood plains. These soils are occasionally flooded during spring and
summer months. Permeability is moderately rapid, available water capacity is moderate, and
surface runoff is slow. The erosion hazard is slight and the soil blowing hazard is moderate.
These soils are used mainly as irrigated cropland and grazing. Wind breaks and environmental
plantings are generally well suited to these soils. Openland wildlife are suited to these soils
where favorable habitat can be established in cropland for nesting and escape cover.

The Haverson loam soils are deep, well drained, nearly level to gently sloping soils found on
terraces, fans, and flood plains. They are subject to rare flooding during spring and summer
months, and the permeability is moderate. Available water capacity is high, surface runoff is
slow, the erosion hazard is slight, and the soil blowing hazard is moderate. These soils are used
mainly as irrigated and nonirrigated cropland and livestock grazing. Wind breaks and
environmental plantings are generally well suited to these soils. Openland wildlife are suited to
these soils where favorable habitat can be established in cropland for nesting and escape cover.

The Hayford silty clay loam soils are deep, somewhat poorly drained, nearly level soils found
on terraces. The permeability is slow. Available water capacity is moderate, surface runoff is

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