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185x Filetype XLSX File size 0.04 MB Source: www.loudounwater.org
Estimate of Construction
Cost
Under the Developer Agreement with Loudoun Water , each project must be built under a
performance bond to assurance completion of the public improvements, a payment bond to ensure
that contractors and suppliers are paid, and a maintenance bond to serve as a warranty on the
work. This form may be used to establish the amount of the performance and payment bonds.
Listed below are unit costs for many of the items that are installed on a typical project. Where the
scope of work is not reflected, or not fully reflected by the listed items and prices, the developer or
engineer will furnish an estimate of cost using other sources, such as a formal engineer’s estimate
or a contract for the work.
The listed items may be considered to include the labor, materials, and equipment needed to make a
complete, typical installation. Components included are clearing; siltation and erosion control;
excavation and trench de-watering; pipe and fittings; blocking and thrust restraint; bedding; native
backfill; acceptance testing; and restoration. Add estimate for items that are site specific, to
include, among others: blasting in open trench, rock excavation by hoe-ram, imported backfill,
offsite dispoal, installation of sewer to a depth greater than 20 feet, and landscape replacement.
Project Name:
Project ID #: Date Prepared:
Item Quantity Unit Unit Price Total Price
WATER MAIN
4" ductle iron pipe and fittings LF $ 55 $ -
6" ductile iron pipe and fittings LF $ 70 $ -
8" ductile iron pipe and fittings LF $ 85 $ -
10" ductile iron pipe and fittings LF $ 100 $ -
12" ductile iron pipe and fittings LF $ 110 $ -
16" ductile iron pipe and fittings LF $ 140 $ -
20" ductile iron pipe and fittings LF $ 160 $ -
24" ductile iron pipe and fittings LF $ 220 $ -
30" ductile iron pipe and fittings LF $ 280 $ -
VALVE
4" or 6" valve Each $ 1,000 $ -
8", 10" or 12" valve Each $ 2,500 $ -
16" or 20" valve Each $ 5,000 $ -
24" or 30" valve Each $ 9,000 $ -
FIRE HYDRANT
hydrant assembly including auxilary valve Each $ 5,300 $ -
AIR RELEASE
air release assembly with manhole Each $ 6,000 $ -
EXTENSION FROM EXISTING BLOW-OFF
4" thru 12" main Each $ 2,000 $ -
16" thru 30" main Each $ 3,500 $ -
CUT-IN ON EXISTING MAIN
6" thru 12" existing main - not including valve(s) Each $ 5,000 $ -
16" thru 30" existing main - not including valve(s) Each $ 10,000 $ -
WET TAP OF EXISTING MAIN
6" thru 12" existing main including tapping sleeve and valv Each $ 8,400 $ -
16" thru 24" existing main including tapping sleeve and val Each $ 15,750 $ -
Engineering Design Manual, Appendix A Page 1 of 3
Estimate of Construction Cost
April 2021
Item Quantity Unit Unit Price Total Price
SERVICE CONNECTION
1" service with meter setting Each $ 1,800 $ -
1.5" and 2" service with meter setting Each $ 3,600 $ -
3" or larger service with underground meter, including 6" v Each $ 22,000 $ -
fire or domestic connection with indoor meter, including 6" Each $ 2,000 $ -
TEMPORARY BLOW-OFF
temporary blow-off with line anchor on 4" thru 12" main Each $ 2,500 $ -
temporary blow-off with line anchor on 16" thru 30" main Each $ 4,000 $ -
TRENCHLESS CROSSING
bore pit and retrieval pit Each $ 7,500 $ -
jack and bore with 16" or 20" casing LF $ 1,000 $ -
jack and bore with 24" or 30" casing LF $ 1,500 $ -
jack and bore with 36" or 42" casing LF $ 2,200 $ -
jack and bore or tunnel with 48" thru 60" casing or liner LF $ 3,000 $ -
WATER MISCELLANEOUS
polyethylene encasement, bonded joints and anode beds LF $ 25 $ -
anode bed and test station Each $ 4,000 $ -
$ -
$ -
$ -
$ -
WATER SUBTOTAL: $ -
Item Quantity Unit Unit Price Total Price
8" SANITARY SEWER
depths to 10' of cover LF $ 68 $ -
cover more than 10' LF $ 131 $ -
10" SANITARY SEWER
depths to 10' of cover LF $ 80 $ -
cover more than 10' LF $ 142 $ -
12" SANITARY SEWER
depths to 10' of cover LF $ 90 $ -
cover more than 10' LF $ 152 $ -
16" SANITARY SEWER
depths to 10' of cover LF $ 110 $ -
cover more than 10' LF $ 185 $ -
20" SANITARY SEWER
depths to 10' of cover LF $ 125 $ -
cover more than 10' LF $ 200 $ -
24" SANITARY SEWER
depths to 10' of cover LF $ 140 $ -
cover more than 10' LF $ 210 $ -
30" SANITARY SEWER
depths to 10' of cover LF $ 165 $ -
cover more than 10' LF $ 265 $ -
Engineering Design Manual, Appendix A Page 2 of 3
Estimate of Construction Cost
April 2021
Item Quantity Unit Unit Price Total Price
36" SANITARY SEWER
depths to 10' of cover LF $ 200 $ -
cover more than 10' LF $ 285 $ -
MANHOLE
4' inside diameter, 6' depth Each $ 5,250 $ -
4' inside diameter, depth below 6' VF $ 368 $ -
5' inside diameter, 6' depth Each $ 6,825 $ -
5' inside diameter, depth below 6' VF $ 525 $ -
connect to existing manhole by core and boot Each $ 2,500 $ -
TRENCHLESS CROSSING
bore pit and retrieval pit Each $ 7,500 $ -
jack and bore through 24" or smaller casing LF $ 1,000 $ -
jack and bore with 30" thru 42" casing LF $ 2,200 $ -
jack and bore or tunnel with 48" thru 60" casing or liner LF $ 3,000 $ -
SEWER MISCELLANEOUS
sewer service connection and lateral Each $ 2,000 $ -
concrete encasement LF $ 200 $ -
bypass pumping-one segment for one week Each $ 5,000 $ -
$ -
$ -
$ -
$ -
SEWER SUBTOTAL: $ -
MISCELLANEOUS FOR WATER OR SEWER
16" or 20" casing installed by direct bury LF $ 160 $ -
24" or 30" casing installed by direct bury LF $ 200 $ -
36" or 42" casing installed by direct bury LF $ 290 $ -
pavement restoration, 4" deep patch SY $ 75 $ -
mill pavement and overlay SY $ 30 $ -
traffic control Day $ 2,200 $ -
imported backfill CY $ 30 $ -
rock excavation by hoe-ram CY $ 300 $ -
12' gravel access road for dedication LF $ 18 $ -
$ -
$ -
MISCELLANEOUS SUBTOTAL: $ -
Water Subtotal + Sewer Subtotal + Miscellaneous Subtotal $ -
Mobilization $ -
10% Construction Contingency $ -
Inflation During the Project at 4% fo 3 years $ -
ESTIMATED COST OF CONSTRUCTION: $ -
Engineering Design Manual, Appendix A Page 3 of 3
Estimate of Construction Cost
April 2021
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