System DemandsProblem Statement

Site Design Pumping Design

Priesthood Restoration Site Water System

Civil and Environmental Engineering Capstone Project Brigham Young University – Provo, UT

Brandon CorbettBlake Newbold

Justin Relitz

Demands

Description gpm Operating Hours

Avg Daily Demand (gpm)

Avg Daily Demand (Gal/Day)

Mtg H Culinary 60 2 5 7200Mtg H Irrigation (1) 35 0.25 0.36 525Mtg H Irrigation (2) 12 0.5 0.25 360Mtg H Fire Flow 400 1.5 25 36000Bowden Culinary 65 2 5.42 7800Public Restroom Culinary 15 1 0.63 900

Total without Fire Flow 11.7 16785Total with Fire flow 36.7 52785

Flow from Well Needed to Fill Tank in 12 hours

gpm Hours of operation Volume (ft3) Volume (gal)

Capacity 73.31 12 7056.3 52785Tank Sizing Volume (ft3) Volume (gal)

Tank Size Needed 7056.3 52785Total Daily Available Water from Well 7056.3 52785Total Demand - Well Water Available 0 0

Check to see if enough Well Water is Available Ok

Demands

Pipe Type Diameter (in)

Length (ft)

Flow Demands (gpm)

Desired Pressure (psi)

Start Elev (ft) End Elev (ft)

Fire Flow 4 300 400 50 934 938Culinary (Mtg House) 2 300 60 60 934 938Culinary (Bowden Prop) 2 1310 60 60 934 940Culinary (Restroom) 2 890 15 60 934 920Irrigation (Mtg House) 2 300 12 - 35 30 934 937

Design

Pipe Type End Junction Pressure (psi) Velocity (fps) Unit Head Loss

(ft/1000ft)Pipe Head

Loss (ft)Fire Flow 64.76 10.21 75.14 22.54Culinary (Mtg House) 56.91 6.13 65.51 19.65Culinary (Bowden Prop) 50.45 3.32 21.05 27.58Culinary (Restroom) 73.16 0.26 0.18 0.16Irrigation (Mtg House) 62.29 3.57 24.14 7.24

Tank Design Well Design

Pipes Design CMU Pump Station

Pump Selection

Project Cost Estimate

The LDS Church has many historic sites around the world which it maintains and improves to all of its visitors. One of the sites is the Priesthood Restoration Site, which is located near Oakland, PA.

There is a new meetinghouse being built (rendering shown to the right), a small bathroom, and a triplex that will need a new water system to supply water for visitors and tenants living in the triplex. We were tasked with designing the water system for the site (proposed site layout shown to the right) and all of the elements needed for the system.

Given the system demands for the whole project, the demand summary to the right was created.

The operating hours were estimated to come up with the average daily demand. Shown in the summary is the average daily demand including and not including the fire flow. As can be seen, the majority of the demand for this system comes from the fire flow required.

These calculations were used to find an appropriate tank size and necessary pumping rate to fill the storage tank from the well.

The water storage tank for the system was required to be underground. With this requirement, the two possible options for tank material were fiberglass and concrete.

Due to the vast amount of labor required for a concrete tank, fiberglass was chosen. The tank will be a 40,000 gallon fiberglass tank manufactured by Xerxes. The drawing to the right shows a cross section of the tank and connection to the pump station.

Based on the geotechnical report, the well was designed to use a 40 foot, 12 inch steel casing. From observation wells, the expected flow from the well was estimated. Using this information, the submersible pump was selected.

To prevent possible surface water contamination, at least 30 feet of casing should be grouted, with the final 10 feet of casing being surrounded with gravel. The expected yield from the well will be 10 gallons per minute.

The pump station was designed using 8 inch split face CMU. The corner joints will use 16 inch architectural stone placed every two courses.

Located within the pump station will be the pumps for distributing the culinary, irrigation, and fire flow water. It will also house the water treatment system, and provide additional maintenance storage.

For ease of installation, or maintenance on the pumps, large 4 foot exterior doors were utilized. This eliminates the need for the pumps to be installed by means of an overhead crane. The roof will be constructed using prefabricated steel trusses, and 29 gauge tin roofing panels.

Other features of the pump station include exterior lighting, and a venting system.

Using the system demands, and calculated head losses, pumps for each application were chosen. Redundancy for each pump was also designed. Two culinary/irrigation pumps will operate in parallel, thus prolonging the lifetime of each pump. In the event of maintenance or temporary shutdown of one pump, the other will be fully capable of supplying the demand while the other receives repairs, or is replaced. The fire flow pumps will not need to operate in parallel, but a second pump will be installed and used as an immediate backup for the first.

This cost estimate is a summary of the total cost from each part of the project. A complete cost breakdown for each of these parts is contained in the project report.

The estimate is based off of material and product costs and does not include costs from labor. With the inclusion of a 15% engineering fee and 25% contingency to cover risk, the total cost comes out to be approximately $280,350.

There were a total of five pipes that were designed for the system. Analysis of the correct pipe sizes, using the flow demands shown in the Tables below, was done using EPA-NET. Head loss was calculated using the Hazen-Williams equation and results are shown in the Tables below. HDPE pipes were chosen because of the ease of installation compared to PVC pipes. The pipe sizes range from 2 to 4 inches in diameter. A site plan showing the locations of pipes is shown in the Figure to the right.

The Tables below show the parameters used for each pipe and produced results showing pressures at each junction, total head loss, and velocities in each pipe. The pressures at the five junctions range from 50 to 74 psi and total head loss ranges from 0.15 to 23 feet. The highest head loss occurs because of the fire flow needed for the system.

Pump Station Elevations and Floor Plan

Berkeley Pump for Fire Flow (30 HP) and Pump Performance Curve

Material Costs Well $ 2,223.50 Storage Tank $ 143,466.00 Chlorination & Water Softening $ 4,500.00 Pumping System $ 20,078.00 CMU Pump Station $ 13,446.95 Pipes & Fittings $ 1,529.50 Mobilization/Demobilization $ 15,000.00 Prelimary Cost Estimate $ 200,243.95 Engineering (15%) $ 30,036.59 Contingency (25%) $ 50,060.99 Total Cost Estimate $ 280,341.54

Well Design and Soil Profile

Visitor’s Center Rendering (Viewed from Pump Station) Priesthood Restoration Site Proposed Site Layout System Demands to Calculate Tank Size and Necessary Pumping Rate

Site Layout

Pipe Parameters Pipe Design Results

Xerxes Fiberglass Tank

Material and Engineering Costs