Project Cost Estimates
Content
“Soft” Shoreline Stabilization Options
Cost Estimates
Basis of Estimates
¾
Preliminary design and specifications
¾
Quantity takeoffs for major
construction items
¾
Construction industry cost data:
z
z
RS Means Cost Data
Vendor quotes for soft engineering
materials such as live or dormant cuttings
and fascines
1
Preliminary Design
¾
Select stabilization technique
¾
Identify site access (land or water)
¾
Define construction staging area
¾
Evaluate construction methods
z
z
z
Cofferdam and dewatering needs
Water work (boats, barges, and divers)
Mechanical equipment or manual labor
Quantity Takeoffs
¾
Access road
z
z
Clearing & grubbing
Gravel
¾
Demolition (concrete, stone, sheetpile,
sheetpile,
timber)
¾
Excavation and fill (gravel, stone riprap)
¾
Stabilizing materials (stone, timber,
geogrid,
geogrid, etc.)
¾
Plantings
2
Direct Costs
¾
Labor and materials
¾
Line item costs for known quantities
z
z
¾
Published cost data (RS Means)
Vendor quotations
Construction duration (multiple
season)
z
z
Mobilization and demobilization
Winter shutdown
Labor
Brush Mattress Installation
Source, Allen and Fischenich 2000
Joint Planting Installation
Source, GSWCC 2000
3
Labor Rates?
Source, Muhlberg and Moore 2005
Labor Data
Source, Allen and Fischenich 2000
Activity
Labor Required
Wattling
2-5 m/hr
Brush Layering
2-5 m/hr
Dormant Posts
0.2 - 1.0 m2/hr
Willow Cuttings
45 - 50 cuttings/hr
Plant Roll
6 m/hr
Coconut Fiber Roll
1.5 m/hr
Sprig Planting
4.0 - 20 m2/hr
Seedling Planting
30 - 120 plants/hr
Ball and Burlap Shrubs
10 - 25 plants/hr
Containerized Plants
20 - 40 plants/hr
Vegetative Geogrids
0.2 - 0.4 m/hr
Seeding
0.02 - 0.2 ha/hr
Hydroseeding
0.05 - 0.15 ha/hr
4
Construction Techniques
Dormant post planting in existing riprap
Source, C. Hoag 2000
Source: Muhlberg and Moore
2005
Construction Techniques
5
Materials Cost Data
Vendor Prices, the following is an excerpt from Ernst Conservation Seeds
http://www.ernstseed.com/Pricelist/Bio%20Engineering.htm
BRUSH MATTRESSING
Live, woody material 1/2 to 3 inches in diameter and random lengths. This material is placed 4 to 6 inches deep on sloped
areas. Generally starting at the bottom of the slope, they are laid in a crisscross pattern protecting 6 or more feet of slope. They
are held in place with wedge-like dead stakes and secured with string or wire. Four inches of loose soil is placed on top to
sufficiently cover the majority of the branches. The brush mattressing will act as an immediate sediment trap and grows into a
shrubby carpet-like protective barrier. Effective on slopes with 2:1 ratio or flatter.
Order material on a square footage basis of coverage area.
1 to 2 branches thick
3 to 4 branches thick
$1.00 per square foot
$2.00 per square foot
{back to top}
LIVE CUTTINGS
LIVE CUTTINGS are living plant material of un-rooted, woody stems that will root and establish shrubs in wet, fertile conditions.
They are ideal for planting in mass where erosion control and bank stability are an immediate concern.
Length
Diameter
Cost
LIVE CUTTINGS
6 inches to 12 inches
3/8 inch to 1 inch
$.25 each
Other Costs
¾
Contractor distributable costs
z
z
z
NonNon-manual supervision
Temporary facilities (office trailer)
Equipment rental
¾
Indirect costs (engineering and design)
¾
Allowance for indeterminants (Items not
included in quantity takeoff)
¾
Contingency (difficulties that can not be
forecasted)
6
Other Cost Considerations
¾
Laboratory and field studies
z
z
Topographic and property surveys
Subsurface investigations
¾
Hazardous and nonnon-hazardous materials
disposal
¾
Administration by project sponsor
¾
Escalation to time of construction
¾
Permitting
Questions?
References
Allen, H.H., and Fischenich, J.C. 2000. Brush mattress for streambank erosion control,
control,
EMRRP Technical Notes Collection. U.S. Army Engineer Research and
and Development
Center, Vicksburg, MS. www.wes.army.mil/el/emrrp
GSWCC. 2000. Guidelines for Streambank Restoration. (Revised March/2000). Georgia
Soil and Water Conservation Commission.
Hoag, J.C. 2001. Costs and Considerations of Streambank Bioengineering Treatments.
Riparian/Wetland Project Information Series No. 15. USDA Natural
Natural Resources
Conservation Service, Aberdeen, ID. July 2000.
Mulberg,
Mulberg, G. and Moore, N.J. 2005. Streambank Revegetation and Protection, A Guide for
Alaska, revised 2005,
2005, Technical Report No. 9898-3. Alaska Department of Fish and Game,
Division of Sport Fish. April 2005.
7
Cost Estimates
Basis of Estimates
¾
Preliminary design and specifications
¾
Quantity takeoffs for major
construction items
¾
Construction industry cost data:
z
z
RS Means Cost Data
Vendor quotes for soft engineering
materials such as live or dormant cuttings
and fascines
1
Preliminary Design
¾
Select stabilization technique
¾
Identify site access (land or water)
¾
Define construction staging area
¾
Evaluate construction methods
z
z
z
Cofferdam and dewatering needs
Water work (boats, barges, and divers)
Mechanical equipment or manual labor
Quantity Takeoffs
¾
Access road
z
z
Clearing & grubbing
Gravel
¾
Demolition (concrete, stone, sheetpile,
sheetpile,
timber)
¾
Excavation and fill (gravel, stone riprap)
¾
Stabilizing materials (stone, timber,
geogrid,
geogrid, etc.)
¾
Plantings
2
Direct Costs
¾
Labor and materials
¾
Line item costs for known quantities
z
z
¾
Published cost data (RS Means)
Vendor quotations
Construction duration (multiple
season)
z
z
Mobilization and demobilization
Winter shutdown
Labor
Brush Mattress Installation
Source, Allen and Fischenich 2000
Joint Planting Installation
Source, GSWCC 2000
3
Labor Rates?
Source, Muhlberg and Moore 2005
Labor Data
Source, Allen and Fischenich 2000
Activity
Labor Required
Wattling
2-5 m/hr
Brush Layering
2-5 m/hr
Dormant Posts
0.2 - 1.0 m2/hr
Willow Cuttings
45 - 50 cuttings/hr
Plant Roll
6 m/hr
Coconut Fiber Roll
1.5 m/hr
Sprig Planting
4.0 - 20 m2/hr
Seedling Planting
30 - 120 plants/hr
Ball and Burlap Shrubs
10 - 25 plants/hr
Containerized Plants
20 - 40 plants/hr
Vegetative Geogrids
0.2 - 0.4 m/hr
Seeding
0.02 - 0.2 ha/hr
Hydroseeding
0.05 - 0.15 ha/hr
4
Construction Techniques
Dormant post planting in existing riprap
Source, C. Hoag 2000
Source: Muhlberg and Moore
2005
Construction Techniques
5
Materials Cost Data
Vendor Prices, the following is an excerpt from Ernst Conservation Seeds
http://www.ernstseed.com/Pricelist/Bio%20Engineering.htm
BRUSH MATTRESSING
Live, woody material 1/2 to 3 inches in diameter and random lengths. This material is placed 4 to 6 inches deep on sloped
areas. Generally starting at the bottom of the slope, they are laid in a crisscross pattern protecting 6 or more feet of slope. They
are held in place with wedge-like dead stakes and secured with string or wire. Four inches of loose soil is placed on top to
sufficiently cover the majority of the branches. The brush mattressing will act as an immediate sediment trap and grows into a
shrubby carpet-like protective barrier. Effective on slopes with 2:1 ratio or flatter.
Order material on a square footage basis of coverage area.
1 to 2 branches thick
3 to 4 branches thick
$1.00 per square foot
$2.00 per square foot
{back to top}
LIVE CUTTINGS
LIVE CUTTINGS are living plant material of un-rooted, woody stems that will root and establish shrubs in wet, fertile conditions.
They are ideal for planting in mass where erosion control and bank stability are an immediate concern.
Length
Diameter
Cost
LIVE CUTTINGS
6 inches to 12 inches
3/8 inch to 1 inch
$.25 each
Other Costs
¾
Contractor distributable costs
z
z
z
NonNon-manual supervision
Temporary facilities (office trailer)
Equipment rental
¾
Indirect costs (engineering and design)
¾
Allowance for indeterminants (Items not
included in quantity takeoff)
¾
Contingency (difficulties that can not be
forecasted)
6
Other Cost Considerations
¾
Laboratory and field studies
z
z
Topographic and property surveys
Subsurface investigations
¾
Hazardous and nonnon-hazardous materials
disposal
¾
Administration by project sponsor
¾
Escalation to time of construction
¾
Permitting
Questions?
References
Allen, H.H., and Fischenich, J.C. 2000. Brush mattress for streambank erosion control,
control,
EMRRP Technical Notes Collection. U.S. Army Engineer Research and
and Development
Center, Vicksburg, MS. www.wes.army.mil/el/emrrp
GSWCC. 2000. Guidelines for Streambank Restoration. (Revised March/2000). Georgia
Soil and Water Conservation Commission.
Hoag, J.C. 2001. Costs and Considerations of Streambank Bioengineering Treatments.
Riparian/Wetland Project Information Series No. 15. USDA Natural
Natural Resources
Conservation Service, Aberdeen, ID. July 2000.
Mulberg,
Mulberg, G. and Moore, N.J. 2005. Streambank Revegetation and Protection, A Guide for
Alaska, revised 2005,
2005, Technical Report No. 9898-3. Alaska Department of Fish and Game,
Division of Sport Fish. April 2005.
7
