Project Informations
Tasks
The following list of tasks are necessary for the project, the final design depends on the following tasks.
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1.0 Site Investigation
- 1.1 Blue Stake
- 1.2 Field Surveying
2.0 Mapping-
3.0 Conceptual Design
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- 3.1 Existing Design Analysis
- 3.2 Material Concept Discussions
- 3.1 Existing Design Analysis
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4.0 Hydrology
- 4.1 Watershed Analysis
- 4.2 Culvert Design Analysis
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5.0 Life Cycle Cost Analysis
- 5.1 Feasibility Report
- 5.2 50% Report
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6.0 Project Management
- 6.1 Website
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7.0 Final Report
- 7.1 Final Presentation
- 7.2 Final Report
Existing Conditions
Existing Materials
There are five residential homes that access Ryan’s Trail. There are currently two gravel driveways, a dirt driveway, an asphalt driveway, and a driveway composed of cinders. The road is 1,420 feet in length, with a 21,000-square foot area, and an average road width between 12 and 16 feet.
Existing Utilities
The existing utilities (gas, water, electric, and cable) that are located under Ryan’s Trail were identified to prevent damage during the road redesign. Blue Stake (a service used to mark existing utilities) was contracted to call out the utilities to prevent incidents such as gas leaks or other damages during construction.
Design alternatives options
Alternatives Options
The materials options we initial consider for the road are asphalt, solid, gravel.
Asphalt: Gravel: Solid:
Depth: 3”AC over 6”AB Depth: 3” gravel mix Concrete: Depth: 6” aggregate base
Price: $4.00 per square foot Price: $25.00 per ton (material, install) Price: -
Maintenance: New sealant every 5-8 years Maintenance: $5,000 per year, per mile Maintenance: New sealant every year
Details of the Final Design
The detail of the road sections show below. More designs are avaliable in Final Design Page.
Road Section 12' wide Road Section 16' wide
Culvert Design Analysis (50-year)
50-Year Culvert Discharge (cfs) Slope (ft/ft) Velocity Downstream (ft/s) 1 (existing) 0.34 0.036854 2.80 1 (proposed) 0.34 0.016708 2.18 2 0.39 0.003500 2.26 3 0.41 0.009975 2.30 4 1.56 0.003879 3.31 5 1.41 0.002996 3.21 6 0.59 0.009926 2.53 7 0.34 0.003721 2.18 Culvert Design Analysis (100 year)
100-Year Culvert Discharge (cfs) Slope (ft/ft) Velocity Downstream (ft/s) 1 (existing) 0.41 0.036854 2.96 1 (proposed) 0.41 0.016708 2.3 2 0.47 0.003500 2.38 3 0.49 0.009975 2.4 4 1.86 0.003879 3.48 5 1.68 0.002996 3.38 6 0.70 0.009926 2.65 7 0.40 0.003721 2.28 Culvert Design
Gantt Chart & Costs
Cost of Services
Cost of Services and Staffing Project Manager (60%) Design Engineer (55%) Drafter (40%) Survey Crew (60%) Technician (50%) Total for Services Estimate costs of Services Pay Rate ($/hr) $ 55.00 $ 45.00 $ 40.00 $ 50.00 $ 20.00 $ 210.00Task Breakdown 1. Site Investigation 10 15 10 25 0 60 72 2. Site Map 10 0 25 15 0 50 20 3. Conceptual Design 20 45 20 0 0 85 120 4. Hydrology 15 10 5 0 30 60 68 5. Life Cylce Cost Analysis 35 35 0 0 0 70 95 6. Final Design 20 40 30 0 10 100 80 7. Project Management 40 25 15 0 5 85 100 Subtotal (hr) 150 170 105 40 45 510 555 Subtotal Pay ($) $ 8,250.00 $ 7,650.00 $ 4,200.00 $ 2,000.00 $ 900.00 $ 23,000$ 23,765Benefits (% compensation) $ 4,950.00 $ 4,207.50 $ 1,680.00 $ 1,200.00 $ 450.00 $ 12,488$ 13,266Profit Margin ($) $ 523.81 $ 428.57 $ 380.95 $ 476.19 $ 190.47 $ 2,000$ 2,000Overhead ($) $ 2,095.24 $ 1,714.29 $ 1,523.81 $ 1,904.76 $ 761.90 $ 8,000$ 8,000Total ($) $ 15,819.05 $ 14,000.36 $ 7,784.76 $ 5,580.95 $ 2,302.37 $ 45,487$ 47,031Cost of Initial Materials
Asphalt Chip Seal Asphalt Gravel Geogrid (geotextile) Concrete Depth of Materials 3" AC over 6" AB 6" AB mix 2"-4" over dirt 2"-4" over dirt 6" Concrete Depth of Materials (feet) 0.66 0.5 0.33 0.33 0.5 Price (per square foot) $4.00 - - $0.45 $6.25 Price (per ton) - $35.00 $25.00 - - Materials Reuired (tons) - 193.5 387 - - Cost for Entire Road $62,400.00 $13,545.00 $4,837.50 $11,857.50 $97,500.00 Cost for Client's Driveway $28,800.00 $5,250.00 $1,875.00 $4,575.00 $37,500.00 Feasibility Analysis
The feasibility analysis brought all costs and values back to present worth using a service life of 20 years to make all alternatives equivalent and comparable. Used 3% for compound interest factors Alternatives were chosen based off: professional advice, client preference, background research, site conditions.
Asphalt
Item Capital Costs $108,000 Operation & Maintenance Costs $81,982 Salvage Value (-$30,452) Total $159,530 Solid Costs
Item Capital Costs $20,900 Operation & Maintenance Costs $7,195 Salvage Value (-$730) Total $27,365 Gravel Costs
Item Capital Costs $20,350 Operation & Maintenance Costs $21,460 Salvage Value (-$3,946) Total $37,864 Summary of Costs
Item Solid $27,365 Gravel $37,864 Asphalt $159,530 Gantt Chart
