THE DIRTBID REGIONAL MODEL · LOUISIANA
Sitework in Louisiana on the same Richmond Metro = 1.00 scale as the rest of DirtBid: 11 cost regions and 64 counties, each with a soil-risk rating from USDA and USGS data. New Orleans Metro runs highest at 0.89×; Shreveport Metro lowest at 0.80×.
Louisiana multipliers and county ratings are planning-level: built from federal price and soil data, and not yet checked against local bids or a local estimator.
Dominant ground: Lafitte, Schriever, Clovelly
7 counties in this region. 7 of 7 rate high for water table. 7 of 7 rate high for undercut. Highest risk score: St. Bernard Parish (6 of 10).
Counties: Jefferson Parish, Orleans Parish, Plaquemines Parish, St. Bernard Parish, St. Charles Parish, St. James Parish, St. John the Baptist Parish
Dominant ground: Commerce, Schriever, Barbary
10 counties in this region. 8 of 10 rate high for water table. 8 of 10 rate high for dewatering. Highest risk score: Ascension Parish (6 of 10).
Counties: Ascension Parish, Assumption Parish, East Baton Rouge Parish, East Feliciana Parish, Iberville Parish, Livingston Parish, Pointe Coupee Parish, St. Helena Parish, West Baton Rouge Parish, West Feliciana Parish
Dominant ground: Guyton, Sharkey, Sacul
27 counties in this region. 25 of 27 rate high for water table. 24 of 27 rate high for dewatering. Highest risk score: Avoyelles Parish (6 of 10).
Counties: Allen Parish, Avoyelles Parish, Beauregard Parish, Bienville Parish, Caldwell Parish, Catahoula Parish, Claiborne Parish, Concordia Parish, East Carroll Parish, Evangeline Parish, Franklin Parish, Iberia Parish, Jackson Parish, LaSalle Parish, Lincoln Parish, Madison Parish, Natchitoches Parish, Red River Parish, Sabine Parish, St. Landry Parish, St. Mary Parish, Tensas Parish, Vernon Parish, Washington Parish, Webster Parish, West Carroll Parish, Winn Parish
Dominant ground: Crowley, Patoutville, Kinder
4 counties in this region. 4 of 4 rate high for water table. 4 of 4 rate high for undercut. Highest risk score: St. Martin Parish (6 of 10).
Counties: Acadia Parish, Lafayette Parish, St. Martin Parish, Vermilion Parish
Dominant ground: Eastwood, Guyton, Keithville
3 counties in this region. 3 of 3 rate high for water table. 2 of 3 rate high for shrink-swell clay. Highest risk score: Bossier Parish (5 of 10). This multiplier sits outside the range the model was tested on, so treat it as rougher.
Counties: Bossier Parish, Caddo Parish, De Soto Parish
Dominant ground: Myatt, Stough, Savannah
1 county in this region. 1 of 1 rate high for water table. 1 of 1 rate high for undercut. Highest risk score: St. Tammany Parish (6 of 10).
Counties: St. Tammany Parish
Dominant ground: Vidrine, Mowata, Edgerly
3 counties in this region. 3 of 3 rate high for water table. 3 of 3 rate high for undercut. Highest risk score: Calcasieu Parish (6 of 10). This multiplier sits outside the range the model was tested on, so treat it as rougher.
Counties: Calcasieu Parish, Cameron Parish, Jefferson Davis Parish
Dominant ground: Perry, Hebert, Ruston
4 counties in this region. 4 of 4 rate high for water table. 4 of 4 rate high for dewatering. Highest risk score: Morehouse Parish (5 of 10). This multiplier sits outside the range the model was tested on, so treat it as rougher.
Counties: Morehouse Parish, Ouachita Parish, Richland Parish, Union Parish
Dominant ground: Allemands, Barbary, Schriever
2 counties in this region. 2 of 2 rate high for shrink-swell clay. 2 of 2 rate high for water table. Highest risk score: Lafourche Parish (6 of 10). This multiplier sits outside the range the model was tested on, so treat it as rougher.
Counties: Lafourche Parish, Terrebonne Parish
Dominant ground: Ruston, Smithdale, Cadeville
2 counties in this region. 2 of 2 rate high for water table. 2 of 2 rate high for dewatering. Highest risk score: Grant Parish (5 of 10). This multiplier sits outside the range the model was tested on, so treat it as rougher.
Counties: Grant Parish, Rapides Parish
Dominant ground: Tangi, Guyton, Maurepas
1 county in this region. 1 of 1 rate high for water table. 1 of 1 rate high for undercut. Highest risk score: Tangipahoa Parish (6 of 10). This multiplier sits outside the range the model was tested on, so treat it as rougher.
Counties: Tangipahoa Parish
FAQ
From USDA soil survey data, the most common across the state: water table (60 of 64 counties rate high), dewatering (58 of 64 counties rate high), undercut (43 of 64 counties rate high). A parcel can differ from its county, so read the survey for your exact site.
From the Commerce Department's Regional Price Parities, on the same Richmond Metro = 1.00 scale as Virginia. Across 29 reviewed regions that method missed by about 0.03 on average. They have not been checked against executed bids in Louisiana, so use them for planning, not a final bid.
They are screening ratings from federal soil and geology data, not a local estimator's review and not a geotechnical report. Tested against 511 reviewed counties, they land within one level most of the time, and exact matches are less common. Get borings before you price a real site.
Soil Report
A $350 DirtBid AI Soil Report reads the official USDA survey for your exact parcel, flags the hazards above, and prices the risk — before you buy land or sign a contract.