| system | 💰 | 💸 | 🛠️ | | -------------- | ----- | ---- | ---------- | | water main | $750k | $30k | 400 hours | | water delivery | $190k | $18k | 1185 hours | #### Assumptions - assumes stable population of 1,000 people. changes would impact water requirements and labor demand. - 1 gallon usage per person per day -> 7000 gallons per week - water is for drinking and minor cleaning. dish cleaning, cooking, and bathrooms are at communal building - delivery to a compact 6-acre plot with efficient routing - infrastructure degradation over time could affect actual maintenance needs, replacement schedules, and water availability - minimal water use drainage is fed into residential green space needs ### Water Main - individual water lines to dwellings from neighborhood water main - emergency response for breaks or leakages - consistent power supply assumed for pumping and pressurization systems, backup systems could add costs #### Labor 400 Hours | task | hours/year | notes | | ----------------------- | ---------- | --------------------------------------------------------------------- | | monitoring and repairs | 200 | includes routine inspections, minor repairs, and troubleshooting. | | testing and treatment | 100 | regular water quality testing and treatment to meet safety standards. | | pump and storage checks | 50 | monthly inspection and upkeep of pumping station and storage tank. | | emergency response | 50 | time allocated for unforeseen issues or breakdowns. | | total labor (hours) | 400 | covers operations, maintenance, and emergency contingencies. | #### Operating Costs $30k | component | annual cost ($) | justification | | --------------------- | --------------- | -------------------------------------------------- | | maintenance | $15,000 | routine upkeep of pipes, storage tanks, and pumps. | | power | $10,000 | energy consumption for pumping and pressurization. | | testing and treatment | $5,000 | ensures water meets health and safety regulations. | | total annual cost | $30,000 | | #### Initial Costs $750k -> $22.2k | component | initial cost ($) | lifespan (years) | amortized cost/year ($) | justification | | ------------------ | ---------------- | ---------------- | ----------------------- | ----------------------------------------- | | water mains | $400,000 | 50 | $8,000 | long-lasting underground piping. | | pumping station | $150,000 | 20 | $7,500 | equipment for maintaining water pressure. | | storage tank | $200,000 | 30 | $6,667 | centralized water storage. | | total initial cost | $750,000 | - | $22,167/year | | this structure mirrors the water delivery table while focusing on the specifics of the water main system. let me know if further adjustments are needed! ### Truck Water Delivery - 1 drum needed per house ~400 - to refill drum, detach from dispenser, refill at truck, replace in dispenser - assumes a high rate of cooperation among residents to facilitate timely water delivery and refills #### Labor 1185 Hours | task | hours/year | notes | | | ------------------------- | ---------- | ------------------------------------------------------------------------------ | --- | | driving and delivery | 1,095 | 3 hours/trip × 365 trips/year; includes driving, setup, and dispensing. | | | cleaning and sanitization | 50 | monthly cleaning of truck tank, pump system, and storage tank (4 hours/month). | | | pump system maintenance | 20 | monthly checks and upkeep of the dispensing system. | | | truck maintenance | 10 | quarterly service for the vehicle. | | | central storage checks | 10 | biannual inspection of the water storage system. | | | total labor (hours) | 1,185 | includes delivery, maintenance, cleaning, and inspections. | | #### Operating Costs $5k | component | annual cost ($) | justification | | ----------------- | --------------- | ---------------------------------------------------- | | fuel | $3,000 | daily trips for water delivery across the community. | | maintenance | $2,000 | routine truck and pump maintenance. | | total annual cost | $5,000 | | #### Initial Costs $190k -> $12.5k | component | initial cost ($) | lifespan (years) | amortized cost/year ($) | justification | | ----------------------- | ---------------- | ---------------- | ----------------------- | ------------------------------------- | | water truck | $80,000 | 10 | $8,000 | large capacity truck for deliveries. | | central storage/filling | $100,000 | 30 | $3,333 | central water storage infrastructure. | | pump system for truck | $10,000 | 10 | $1,000 | equipment for water dispensing. | | total initial cost | $190,000 | - | $12,333/year | |