Effects of NRCS Conservation Practices - National

Dam Code: 402

Units: no.

C F R P Pr D W O AL

Soil Erosion Effect Rationale

Soil Erosion - Sheet and Rill Erosion 0

Soil Erosion - Wind Erosion 0

Soil Erosion - Ephemeral Gully Erosion 0

Soil Erosion - Classic Gully Erosion 2

Soil Erosion - Streambank, Shoreline, Water Conveyance C 1

Soil Quality Degradation

 Organic Matter Depletion 0

 Compaction 0

 Subsidence 0

 Concentration of Salts or Other Chemicals -1

Excess Water

 Excess Water - Seeps -2

 Excess Water - Runoff, Flooding, or Ponding 2

 Excess Water - Seasonal High Water Table -1

 Excess Water - Drifted Snow 0

Insufficient Water

 Insufficient Water - Inefficient Use of Irrigation Water 2

 Insufficient Water - Inefficient Moisture Management 0

Water Quality Degradation

 Pesticides in Surface Water 0

 Pesticides in Groundwater 0

 Nutrients in Surface water 0

 Nutrients in Groundwater -1

 Salts in Surface Water 0

 Salts in Groundwater 0

 Excess Pathogens and Chemicals from Manure, Bio-solid -2 

 Excess Pathogens and Chemicals from Manure, Bio-solid 0 

Not Applicable

Not Applicable

Not Applicable

Nutrients impounded could contaminate groundwater.

Not Applicable

Not Applicable

Because of aquatic animal feed or decaying vegetation, or from excessive nutrients in runoff

Not Applicable

Seepage from ponded water.

Not Applicable

Provides permanent water storage for irrigation. 

Not Applicable

Not Applicable

Not Applicable

Concentrates salts and chemicals in one location where build up over time can occur.

Possible seepage from ponding of water.

Runoff and peak flows reduced. 

An artificial barrier that can impound water for one or more beneficial purposes.

Not Applicable

Not Applicable

Not Applicable

Not Applicable

Stabilization of the gully due to the embankment.

Reduced peak flows downstream from embankment.

AL-Aso Land 

W-Water 

O-Other 

D-Developed 

FS-Farmstead 

Pr-Protected 

P-Pasture 

F-Forest 

R-Range 

C-Crop

Typical Landuse:
 Excessive Sediment in Surface Water 2

 Elevated Water Temperature 0

 Petroleum, Heavy Metals and Other Pollutants Transporte 0

 Petroleum, Heavy Metals and Other Pollutants Transporte 0

Air Quality Impacts

 Emissions of Particulate Matter (PM) and PM Precursors 0

 Emissions of Ozone Precursors 0

 Emissions of Greenhouse Gases (GHGs) 0

 Objectionable Odors 0

Degraded Plant Condition

 Undesirable Plant Productivity and Health 0

 Inadequate Structure and Composition 0

 Excessive Plant Pest Pressure 0

 Wildfire Hazard, Excessive Biomass Accumulation 0

Fish and Wildlife - Inadequate Habitat

 Inadequate Habitat - Food 2

 Inadequate Habitat - Cover/Shelter 2

 Inadequate Habitat - Water 0

 Inadequate Habitat - Habitat Continuity (Space) 2

Livestock Production Limitation

 Inadequate Feed and Forage 0

 Inadequate Shelter 0

 Inadequate Water 4

Inefficient Energy Use

 Equipment and Facilities 0

 Farming/Ranching Practices and Field Operations 0

CPPE Practice Effects: 0 No Effect

5 Substantial Improvement -1 Slight Worsening

4 Moderate to Substantial Improvement -2 Slight to Moderate Worsening

3 Moderate Improvement -3 Moderate Worsening

2 Slight to Moderate Improvement -4 Moderate to Substantial Worsening

1 Slight Improvement -5 Substantial Worsening

Dams can also provide stock water.

Not Applicable

Not Applicable

Impounded water improves cover and shelter for some fish and wildlife, but decreases it for stream species. 

Although water is impounded for lotic species, passage to upstream and downstream habitats is not possible for fish and other 

aquatic wildlife. 

Ponds and adjacent areas provide additional space for wildlife and pond-dwelling species, but eliminates space for stream species.

Not Applicable

Not Applicable

Impounded water improves food availability for some fish and wildlife, but decreases food sources for other species, especially 

stream dwellers. 

Not Applicable

Not Applicable

Not Applicable

Not Applicable

Not Applicable

Not Applicable

Not Applicable

Not Applicable

Not Applicable

Suspended sediments are trapped.

Water released from impoundments may be warmer or cooler than receiving waters, depending on site conditions.

Not Applicable