Cost Comparison:
Fiberglass insert vs. replace 5' dia x 10' deep concrete manhole

Fiberglass insert acid resistant to 98% Block lane Hydroblast manhole wall Rehabilitate bench Cut street 8' x 8' Remove old cone Drop in inserts sections Grout annular space Place Composite cone Backfill around cone Coat bench Set adjustment rings Pave street Elapsed time – 6-8 hours Cost – $12,500 Warranty – 25 plus years

Replace deteriorated concrete manhole zero acid resistant Divert traffic Cut street 15' x 15' Excavate 15' x 15' hole Bypass any phone, gas, water and electric lines Remove old manhole Rehabilitate bench Set new manhole Reconnect phone, gas, water and electric lines Backfill hole and area around cone Set adjustment rings Pave street Elapsed time – 5-10 days + weather allowance Cost – $30,000 to $40,000 depending on utilities Warranty – 1 year

Cost Comparison:
New 5' dia. x 10' deep fiberglass manhole vs. a new lined concrete manhole over 28 years

	Fiberglass Manhole	Lined Concrete Manhole	Difference
Manhole with cone	$6,766	$3,500 (2005)
Interior liner	$0	$2,850
Initial outlay (not including installation)	$6,766	$6,350	$635 per v.f.
Rehabilitation (every 7 years w/3% inflation)	$0	$4,670 (2012)	($1,102) per v.f.
	$0	$5,743 (2019)	($1,676.30) per v.f.
	$0	$7,064 (2026)	($2,382.70) per v.f.
	$0	$7,950 (2033)	($3,177.70) per v.f.
Total:	$6,766	$31,777 (4x)

After 28 years the final breakdown of costs are:
157 sq.ft. =	$43.09 per sq.ft. or $676.91 per v.f.	$202.40 per sq.ft. or $3,177.70 per v.f.