Practice Problems: Cost Estimation
Question 1
A project engineer is preparing a cost estimate for a highway construction project. The earthwork volume is estimated at 45,000 cubic yards. The unit cost for excavation is $8.50 per cubic yard, hauling cost is $3.75 per cubic yard, and compaction cost is $2.25 per cubic yard. A contingency of 15% is applied to the total earthwork cost. What is the total estimated cost for the earthwork including contingency?
(a) $651,750
(b) $562,500
(c) $646,875
(d) $747,563
Question 2
A construction manager is estimating the concrete cost for a building foundation. The project requires 850 cubic yards of concrete at $125 per cubic yard delivered. Formwork costs are $18,500, reinforcing steel costs are $42,300, and labor costs are $68,200. Overhead and profit are calculated at 18% of the total direct costs. What is the total estimated foundation cost?
(a) $235,375
(b) $277,743
(c) $262,850
(d) $245,680
Question 3
A civil engineer is estimating the cost of a drainage system installation. The project involves installing 2,400 linear feet of 36-inch diameter RCP (reinforced concrete pipe) at $185 per linear foot. Excavation and backfill costs are estimated at $45 per linear foot. Manholes cost $8,500 each and 6 are required. Engineering and testing costs are 8% of construction costs. What is the total project cost?
(a) $603,120
(b) $647,366
(c) $595,200
(d) $688,450
Question 4
A project manager is preparing a parametric cost estimate for a wastewater treatment plant expansion. Historical data indicates that similar plants cost $450 per gallon per day (gpd) of capacity. The planned expansion will add 2.5 million gallons per day of treatment capacity. A location factor of 1.15 applies due to the site conditions. An escalation factor of 1.08 is used to account for cost increases since the historical data was collected. What is the estimated construction cost?
(a) $1,125,000,000
(b) $1,395,000,000
(c) $1,242,000,000
(d) $1,381,500,000
Question 5
A highway engineer is estimating asphalt paving costs for a roadway project. The project requires paving 3.2 miles of two-lane roadway with each lane 12 feet wide. The asphalt thickness is 4 inches and the unit cost is $95 per ton. Asphalt weighs 145 pounds per cubic foot in place. What is the estimated cost of asphalt material?
(a) $723,456
(b) $826,880
(c) $765,120
(d) $892,340
Question 6
A structural engineer is estimating the cost for structural steel for a bridge project. The project requires 285 tons of structural steel at $2,850 per ton fabricated and delivered. Erection costs are $1,200 per ton. Field painting costs $425 per ton. The contractor's fee is 12% of the total direct costs. What is the total estimated cost for the structural steel component?
(a) $1,275,375
(b) $1,430,420
(c) $1,158,750
(d) $1,297,800
Question 7
A construction estimator is calculating equipment costs for a 120-day earthmoving project. The project requires a bulldozer with an ownership cost of $185 per day and operating cost of $95 per hour. The equipment will operate 8 hours per day with a utilization factor of 0.75 (accounting for downtime). What is the total estimated equipment cost for the project duration?
(a) $90,600
(b) $113,400
(c) $95,200
(d) $108,000
Question 8
A project engineer is developing a cost estimate for site grading work. The contractor's production rate for grading is 450 cubic yards per hour. The project requires moving 75,000 cubic yards of earth. The loaded hourly cost for the equipment and operator is $285. A productivity efficiency factor of 0.80 is used to account for actual field conditions. What is the estimated grading cost?
(a) $47,500
(b) $59,375
(c) $53,500
(d) $71,250
Question 9
A water resources engineer is estimating costs for a stormwater detention pond. Excavation volume is 18,500 cubic yards at $12.50 per cubic yard. The pond liner costs $3.85 per square foot and covers 42,000 square feet. Outlet structures cost $125,000. Landscaping and seeding costs are $0.75 per square foot for the 42,000 square feet. Contingency is 20% of total direct costs. What is the total project estimate?
(a) $524,250
(b) $629,100
(c) $587,400
(d) $565,800
Question 10
A transportation engineer is estimating the cost for traffic signal installation at an intersection. Material costs for signal heads, poles, controllers, and detection systems total $185,000. Installation labor is estimated at 850 hours at $75 per hour. Electrical work requires 320 hours at $95 per hour. Mobilization is 5% of construction costs, and bonds and insurance add 3.5% to the total. What is the total project cost?
(a) $329,763
(b) $341,250
(c) $358,094
(d) $315,650
Question 11
A geotechnical engineer is estimating the cost of soil stabilization for a road base. The project area is 4,800 feet long by 32 feet wide requiring lime treatment to a depth of 12 inches. Lime costs $85 per ton and the application rate is 4% by dry weight. The soil density is 115 pounds per cubic foot. Mixing and compaction costs $3.50 per cubic yard. What is the total estimated cost?
(a) $156,480
(b) $187,733
(c) $168,960
(d) $203,520
Question 12
A project manager is preparing a ROM (Rough Order of Magnitude) estimate for a parking structure. The structure will have 650 parking spaces. Historical data shows similar structures cost between $18,500 and $24,500 per space depending on configuration and finishes. The project site has moderately difficult soil conditions adding 12% to the base cost. Using the average historical cost, what is the estimated project cost?
(a) $13,975,000
(b) $15,652,000
(c) $17,808,000
(d) $14,235,000
Question 13
A construction estimator is calculating the cost of formwork for a concrete wall. The wall is 185 feet long, 18 feet high, and requires forms on both sides. Formwork rental costs $2.85 per square foot per use. The forms will be used three times (reused twice). Form installation labor is $1.45 per square foot, and stripping labor is $0.65 per square foot. What is the total formwork cost for the wall?
(a) $35,446
(b) $42,180
(c) $38,295
(d) $45,720
Question 14
A municipal engineer is estimating the cost for water main installation. The project requires installing 3,800 linear feet of 12-inch ductile iron pipe at $125 per linear foot installed. Valve installations cost $4,500 each and 8 valves are required. Fire hydrants cost $6,800 each and 6 are needed. Testing and disinfection costs are $8,500 total. Pavement restoration is $42 per linear foot. What is the total construction cost?
(a) $711,100
(b) $762,300
(c) $685,400
(d) $748,900
Question 15
A bridge engineer is using the cost capacity method to estimate a new bridge project. A similar bridge built 2 years ago with a span of 180 feet cost $2,850,000. The new bridge will have a 240-foot span. The cost capacity exponent for bridge spans is 0.65. An escalation factor of 1.12 applies for time adjustment. What is the estimated cost of the new bridge?
(a) $3,800,000
(b) $4,156,320
(c) $3,990,500
(d) $4,428,800
Question 16
A contractor is estimating labor costs for placing and finishing 12,500 square feet of concrete slab. The crew consists of 1 foreman at $48/hour, 5 cement finishers at $42/hour each, and 3 laborers at $32/hour each. The production rate is 185 square feet per hour. Worker's compensation insurance is 18% of labor cost, and payroll taxes are 12% of labor cost. What is the total labor cost including insurance and taxes?
(a) $28,956
(b) $36,540
(c) $33,478
(d) $31,240
Question 17
A site development engineer is estimating costs for storm sewer installation. The project includes 1,850 linear feet of 24-inch RCP at $95/LF, 1,200 linear feet of 18-inch RCP at $68/LF, and 4 catch basins at $3,200 each. Mobilization is 8% of pipe and structure costs. Engineering design is $28,500 and construction staking is $12,400. Construction administration is 6% of total construction cost. What is the total project cost?
(a) $304,180
(b) $328,650
(c) $315,774
(d) $342,920
Question 18
A pavement engineer is estimating mill and overlay costs for a highway rehabilitation project. The project involves milling 2.8 miles of pavement (two 12-foot lanes) at a depth of 2 inches and replacing with new asphalt. Milling costs $1.85 per square yard. Asphalt overlay costs $78 per ton. Asphalt density is 148 pounds per cubic foot. Traffic control costs are $32,500. What is the total project cost?
(a) $418,960
(b) $456,230
(c) $389,440
(d) $502,180
Question 19
A project engineer is preparing a detailed estimate for a retaining wall. The wall requires 285 cubic yards of concrete at $145/cy, 42,500 pounds of reinforcing steel at $0.85/lb, 8,200 square feet of formwork at $12.50/sf, and excavation of 450 cubic yards at $18/cy. Waterproofing costs $8.25/sf for 2,850 sf. Backfill with drainage aggregate costs $45/ton for 380 tons. General conditions are 14% of direct costs. What is the total estimated cost?
(a) $229,448
(b) $261,571
(c) $244,320
(d) $278,940
Question 20
A construction planner is estimating costs for a temporary access road for a 14-month project. The road is 1,850 feet long and 24 feet wide requiring 8 inches of crushed stone base at $28 per ton. Stone weighs 2,750 pounds per cubic yard in place. Monthly maintenance is estimated at $1,450. The road will be removed at project completion at a cost of $6.50 per square yard. What is the total cost for the temporary road?
(a) $178,960
(b) $164,280
(c) $152,430
(d) $186,750
