Cost factors
The cost to install a retaining wall depends on site conditions and many other cost factors:
Size – Taller walls need stronger support and depth into lakebed and additional reinforcements
Design – Complex walls with curves, steps, openings, and other designs increase labor time.
Site prep/Excavation – Removing old retaining walls and concrete costs more
Reinforcements – Deadman tie the top of the wall to a post driven into the ground behind the wall which is then anchored by rods. Adding additional deadmen, which keep the wall from falling toward the lake because of the hydrostatic pressure (water pressure behind wall from sprinklers and rainfall) will add cost.
Location & Access - Using a barge compared to having access buy land increases the price of the installation. Working on slopes, hard-to-access sites, limited access for heavy machinery, increases labor time.
Drainage – Installing a drainage system costs $10 to $80 per linear foot to prevent flooding and erosion.
Landscaping – Landscaping costs $50 to $100 per hour for additional yard work, sprinkler repairs and electrical to boat docks or sprinkler pumps.
BEST PRICE ISN'T ALWAYS THE BEST OPTION