FINAL UTILITY REPORT FALLBROOK FARMS · t 303.561.3333 | f 303.561.3339 | 45 West 2. nd. Avenue,...

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FINAL UTILITY REPORT

FALLBROOK FARMS Thornton, CO

August 19, 2015

JN: 14053

Prepared for:

Carlson Associates Ryland Homes PO Box 247 6161 S. Syracuse Way, Suite 200 Eastlake, CO 80614 Greenwood Village, CO 80111 P: 303.457.2966 P: 303.486.5000

Prepared by:

Jansen Strawn Consulting Engineers

45 West 2nd Avenue Denver, CO 80223

Thomas C. Jansen, PE No. 35942

Principal

Fallbrook Farms August 14, 2015


CERTIFICATIONS Ryland Homes hereby certifies that the utilities (water and sanitary sewer) for the Fallbrook Farms Subdivision will be constructed to the design presented in this report. I understand that the City of Thornton does not and shall not assume liability for the utilities designed and/or certified by my engineer. I understand that the City of Thornton reviews utility plans but cannot, on behalf of Ryland Homes, guarantee that final utility design review will absolve Ryland Homes and/or their successors and/or assigns of future liability for improper design. I further understand that approval of the Final Plan and/or Final Development Plan does not imply of my engineer’s utility design.

Attest: Name of Responsible Party

Notary Public Authorized Signature

I hereby certify that this report (plan) for the Final Utility design of water and sanitary sewer for the Fallbrook Farms Subdivision was prepared by me (or under my direct supervision) in accordance with the provisions of the City of Thornton Standards and Specifications for the Responsible Parties thereof. I understand that the City of Thornton does not and will not assume liability for utilities designed by others.

Thomas C. Jansen, PE Date State of Colorado Registration No. 35942 For and on behalf of Jansen Strawn Consulting Engineers, Inc.



T A B L E O F C O N T E N T S

I. INTRODUCTION ....................................................................................................................... 4

II. GENERAL LOCATION AND DESCRIPTION ................................................................................. 4

III. EXISTING UTILITIES .................................................................................................................. 4

IV. PROPOSED UTILITIES ............................................................................................................... 5

V. REFERENCES ............................................................................................................................ 7

A P P E N D I C E S

APPENDIX A – Maps Vicinity Map

APPENDIX B – Water Water Demands WaterCAD Plan View WaterCAD Output

APPENDIX C – Sanitary Sewer Sanitary Sewer Calculations

APPENDIX D – Plans Overall Utility Plan



I. INTRODUCTION

The purpose of this Final Utility Report is to analyze the impact of the proposed development of the Fallbrook Farms subdivision on the existing water and sanitary sewer infrastructure and adequately size proposed infrastructure to service the users of this development.

II. GENERAL LOCATION AND DESCRIPTION

A. Site LocationThe Fallbrook Farms Subdivision (Site) is located in the north one-half of section 24, township 1 south, range 68 west of the 6th principal meridian, City of Thornton, County of Adams, State of Colorado. The site lies to the north of East 140th Avenue and west of Colorado Boulevard. Adjacent developments to the site include Fallbrook Subdivision Filing 1 to the west, Cherrywood Park Subdivision Filing 1 to the south, and the Thornton Fire Department Station 5 to the southeast. See Appendix A for the vicinity map.

B. Description of Property An overall Conceptual Site Plan (CSP) for the Fallbrook Farms subdivision has been submitted and close to approval by the City of Thornton. The Fallbrook Farms subdivision is currently being platted which is also under review by the City of Thornton. The overall site consists of approximately 14 acres of land proposed to be developed into 112 multi-family detached residential units.

This report specifically addresses the site’s utility improvements as shown in the construction drawings under review concurrently with this Report while analyzing the overall site for water modeling and sanitary where applicable.

The existing site is undeveloped native grassland. The topography slopes gradually from east to west.

III. EXISTING UTILITIES

A. Potable Water System

Information regarding existing water facilities has been gathered from the City of Thornton. According to these sources, the subject property is located within Pressure Zone 1C. This zone has a hydraulic grade line (HGL) of 5,494 feet.

An existing City of Thornton 8 inch water main is located within the site, running west to east near the southern portion of the site. The Fallbrook Farms subdivision will be



connecting to this existing 8 inch water main at two locations along the southern portion of the site. The Fallbrook Farms subdivision will be connecting at a third location to another 8 inch water main located in Jackson Street.

B. Sanitary Sewer The Fallbrook Farms site will tie into the existing Fallbrook Filing 1 stub outfall system. This 8 inch existing sanitary sewer stub is located in the western portion of the site.

IV. PROPOSED UTILITIES

Fallbrook is planned to be constructed in one phase. Each phase will require a looped water system and sanitary sewer outfall. Utilities for Fallbrook are addressed within this report.

A. Potable Water System This project shall rely on the existing 8 inch water main located in the southern portion of the site, as well as an existing 8 inch water main located within Jackson Street. The first connection will be at the end of STREET B, where the proposed 8 inch main will be continued north along street B. The second connection will be to an 8 inch stub in Jackson Street where it will extend to the end of STREET A and connect to the proposed 8 inch main located within STREET B. All waterlines are looped except at cul-de-sac or dead-end locations as shown on the attached utility map. All waterline mains will be 8 inch PVC. All fire hydrant connections will be 6 inch ductile iron pipe except where hydrants are temporarily placed at the end of waterline mains.

A WaterCAD model was prepared for Fallbrook Farms using City of Thornton criteria and the following scenarios within Zone 1C:

Average Day - Max Pressure=100 psi, Min Pressure=50 psi Max Daily + Fire Flow - Min Pressure=20 psi, Max Velocity=11.2 fps Peak Hour - Min Pressure = 40 psi, Max Velocity=5 fps Fire Flow Rate = 1,500 gpm

Design criteria used is as follows:

2.45 persons per dwelling Average Day = 150 gallons per person per day

Maximum Daily = 3.2 x Average Day Maximum Hourly = 5.76 x Average Day



Water demands for each water node were determined using the above criteria and scenarios. Based on the model the peak hour max pressure is 105 psi and the min pressure is 97 psi. The maximum daily plus fire flow scenario yielded a min pressure of 86 psi with a max pressure of 98 psi. The highest pressure for all scenarios is found in the near the western edge of the site at Junction J-20 and the minimum pressure is found in the southern edge of the site at Junction J-18. Based on the high pressures, PRV’s are proposed for each house along sections that exceed 100 psi to reduce pressures. Detailed results can be found in Appendix B. Cathodic protection will be installed per the geotech report.

B. Sanitary Sewer The sanitary sewer has been designed to meet City of Thornton Standards and Specifications. The entire Fallbrook Farms subdivision outfalls to an existing 8 inch sanitary sewer stub located on the west side of the site. This existing stub is a part of the Fallbrook Filing 1 outfall system. A design for this outfall was completed by Jansen Strawn Consulting Engineers.

Criteria used is as follows:

2.45 persons per dwelling Average Day (F) = 80 gallons per person per day

Peaking factor = 1.72 / (F 0.295) [3.5 max, 2.6 min] Design Slope for 8” pipe between 0.40% and 5.00% Velocity between 2 and 10 feet per second Design capacity for pipes smaller 15” = 50% maximum capacity

The Fallbrook Farms site has been analyzed as one basin connecting to the existing 8 inch sanitary sewer that is a part of the Fallbrook Filing 1 outfall system. The basin contains all lots within the entire development, consisting of 112 dwelling units. The average flow for the basin is 21,952 gallons per day (gpd).Eight inch mains shall adequately serve this basin utilizing minimum, slopes as shown in the calculation within the appendix.



V. REFERENCES

1. City of Thornton Standards and Specifications, City of Thornton, October 2012.

2. Water and Wastewater Systems Master Plan – City of Thornton, The Engineering Company, May 2010


APPENDIX A – Maps Vicinity Map


APPENDIX B – Domestic Water Water Demands

WaterCAD Plan View

WaterCAD Output

1 of 2

Date: 8/18/2015Prepared by: DFA

Persons/Unit = 2.45Average Day Demand = 150 gpdpp

Maximum Daily Demand = 3.2 x Average Day DemandMaximum Hourly Demand = 5.76 x Average Day Demand

Fire Demand = 1500 gpm

gpd gpm gpd gpm gpd gpmJ01 0 0.00 0 0.0 0 0.0 0 0.0J02 16 39.20 5,880 4.1 18,816 13.1 33,869 23.5J03 0 0.00 0 0.0 0 0.0 0 0.0J04 16 39.20 5,880 4.1 18,816 13.1 33,869 23.5J05 0 0.00 0 0.0 0 0.0 0 0.0J06 18 44.10 6,615 4.6 21,168 14.7 38,102 26.5J07 4 9.80 1,470 1.02 4,704 3.27 8,467 5.88J08 2 4.90 735 0.5 2,352 1.6 4,234 2.9J09 0 0.00 0 0.0 0 0.0 0 0.0J10 2 4.90 735 0.5 2,352 1.6 4,234 2.9J11 0 0.00 0 0.0 0 0.0 0 0.0J12 14 34.30 5,145 3.6 16,464 11.4 29,635 20.6J13 0 0.00 0 0.0 0 0.0 0 0.0J14 4 9.80 1,470 1.0 4,704 3.3 8,467 5.9J15 14 34.30 5,145 3.6 16,464 11.4 29,635 20.6J16 0 0.00 0 0.0 0 0.0 0 0.0J17 14 34.30 5,145 3.6 16,464 11.4 29,635 20.6

Totals 104 254.80 26.5 84.9 152.9

Number of units PersonsJunction

Fallbrook 3 - All PhasesWater Demand Calculations

DemandAverage Day Maximum Daily Maximum Hourly

Scenario: Average Day

P-39

P-34

P-28P-27

P-25P-24

P-20

P-17

P-16

P-8

P-50

P-48

P-47 P-46

P-45

J-26

J-7

J-8

J-16

J-20

J-21

J-13

J-19

J-10

J-11

J-25

J-12

J-14

J-5

J-15

J-6 J-22

J-18

J-9

J-17

J-24

J-3

J-4

J-2

J-23

J-1

H-1

H-5

H-2

H-4

H-3

Page 1 of 127 Siemon Company Drive Suite 200 W Watertown, CT 06795 USA +1-203-755-1666

8/19/2015

Bentley WaterCAD V8i (SELECTseries 5)[08.11.05.61]

Bentley Systems, Inc. Haestad Methods Solution Center14053 Fallbrook_WaterCAD.wtg

LabelElevation

(ft)Demand

(gpm)Hydraulic Grade (ft)

Pressure (psi)

J-17 5266 4 5494 99J-18 5270 0 5494 97J-15 5256 4 5494 103J-14 5252 1 5494 105J-12 5253 4 5494 104J-11 5254 0 5494 104J-10 5254 1 5494 104J-21 5253 0 5494 104J-20 5250 0 5494 106J-8 5256 1 5494 103J-7 5256 1 5494 103J-26 5256 0 5494 103J-23 5263 0 5494 100J-4 5259 4 5494 102J-6 5258 5 5494 102J-22 5259 0 5494 102J-5 5258 0 5494 102J-19 5254 0 5494 104J-16 5256 0 5494 103J-13 5251 0 5494 105J-1 5266 0 5494 99J-2 5264 4 5494 100J-3 5263 0 5494 100J-25 5266 0 5494 99J-24 5259 0 5494 102J-9 5255 0 5494 103

ACTIVE SCENARIO: AVERAGE DAY DEMAND

FALLBROOK FARMS

LabelLength

(Scaled) (ft)

Start Node

Stop Node

Diameter (in)

MaterialHazen-

Williams C

Flow (gpm)

Velocity (ft/s)

Headloss Gradient

(ft/ft)

P-7 10 R-1 J-17 8 PVC 150 13 0.09 0P-8 219 J-17 J-18 8 PVC 150 0 0 0P-11 204 J-15 J-14 8 PVC 150 6 0.04 0P-13 119 J-12 J-11 8 PVC 150 3 0.02 0P-14 78 J-11 J-10 8 PVC 150 1 0 0P-16 90 J-10 J-21 8 PVC 150 0 0 0P-17 155 J-12 J-20 8 PVC 150 0 0 0P-20 127 J-11 J-8 8 PVC 150 2 0.02 0P-21 108 J-8 J-7 8 PVC 150 3 0.02 0P-22 73 J-7 J-26 8 PVC 150 0 0 0P-24 288 J-8 J-4 8 PVC 150 -1 0.01 0P-25 131 J-4 J-23 8 PVC 150 0 0 0P-27 178 J-6 J-7 8 PVC 150 -2 0.01 0P-28 130 J-6 J-22 8 PVC 150 0 0 0P-31 181 J-4 J-5 8 PVC 150 3 0.02 0P-32 43 J-5 J-6 8 PVC 150 3 0.02 0P-33 31 J-5 H-2 8 PVC 150 0 0 0P-34 166 J-15 J-19 8 PVC 150 0 0 0P-35 28 J-15 J-16 8 PVC 150 -10 0.06 0P-36 418 J-16 J-17 8 PVC 150 -10 0.06 0P-37 61 J-14 J-13 8 PVC 150 7 0.04 0P-38 130 J-13 J-12 8 PVC 150 7 0.04 0P-39 30 J-13 H-4 8 PVC 150 0 0 0P-40 31 J-16 H-5 8 PVC 150 0 0 0P-41 53 R-2 J-1 8 PVC 150 13 0.08 0P-42 207 J-1 J-2 8 PVC 150 13 0.08 0P-43 121 J-2 J-3 8 PVC 150 9 0.06 0P-44 185 J-3 J-4 8 PVC 150 8 0.05 0P-45 304 J-3 J-14 8 PVC 150 1 0.01 0P-46 129 J-2 J-25 8 PVC 150 0 0 0P-47 167 J-2 J-24 8 PVC 150 0 0 0P-48 31 J-1 H-1 8 PVC 150 0 0 0P-49 54 J-10 J-9 8 PVC 150 0 0 0P-50 10 J-9 H-3 8 PVC 150 0 0 0

FALLBROOK FARMSACTIVE SCENARIO: AVERAGE DAY DEMAND

LabelElevation

(ft)Demand


Pressure (psi)

J-17 5266 11 5494 99J-18 5270 0 5494 97J-15 5256 11 5493.99 103J-14 5252 3 5493.99 105J-12 5253 11 5493.98 104J-11 5254 0 5493.98 104J-10 5254 2 5493.98 104J-21 5253 0 5493.98 104J-20 5250 0 5493.98 106J-8 5256 2 5493.98 103J-7 5256 3 5493.98 103J-26 5256 0 5493.98 103J-23 5263 0 5493.98 100J-4 5259 13 5493.98 102J-6 5258 15 5493.98 102J-22 5259 0 5493.98 102J-5 5258 0 5493.98 102J-19 5254 0 5493.99 104J-16 5256 0 5493.99 103J-13 5251 0 5493.99 105J-1 5266 0 5494 99J-2 5264 13 5493.99 100J-3 5263 0 5493.99 100J-25 5266 0 5493.99 99J-24 5259 0 5493.99 102J-9 5255 0 5493.98 103

ACTIVE SCENARIO: MAX DAY DEMAND

FALLBROOK FARMS

LabelLength

(Scaled) (ft)

Start Node

Stop Node

Diameter (in)

MaterialHazen-

Williams C

Flow (gpm)

Velocity (ft/s)

Headloss Gradient

(ft/ft)

P-7 10 R-1 J-17 8 PVC 150 43 0.27 0P-8 219 J-17 J-18 8 PVC 150 0 0 0P-11 204 J-15 J-14 8 PVC 150 20 0.13 0P-13 119 J-12 J-11 8 PVC 150 10 0.06 0P-14 78 J-11 J-10 8 PVC 150 2 0.01 0P-16 90 J-10 J-21 8 PVC 150 0 0 0P-17 155 J-12 J-20 8 PVC 150 0 0 0P-20 127 J-11 J-8 8 PVC 150 8 0.05 0P-21 108 J-8 J-7 8 PVC 150 9 0.06 0P-22 73 J-7 J-26 8 PVC 150 0 0 0P-24 288 J-8 J-4 8 PVC 150 -3 0.02 0P-25 131 J-4 J-23 8 PVC 150 0 0 0P-27 178 J-6 J-7 8 PVC 150 -6 0.04 0P-28 130 J-6 J-22 8 PVC 150 0 0 0P-31 181 J-4 J-5 8 PVC 150 9 0.06 0P-32 43 J-5 J-6 8 PVC 150 9 0.06 0P-33 31 J-5 H-2 8 PVC 150 0 0 0P-34 166 J-15 J-19 8 PVC 150 0 0 0P-35 28 J-15 J-16 8 PVC 150 -32 0.2 0P-36 418 J-16 J-17 8 PVC 150 -32 0.2 0P-37 61 J-14 J-13 8 PVC 150 21 0.13 0P-38 130 J-13 J-12 8 PVC 150 21 0.13 0P-39 30 J-13 H-4 8 PVC 150 0 0 0P-40 31 J-16 H-5 8 PVC 150 0 0 0P-41 53 R-2 J-1 8 PVC 150 42 0.27 0P-42 207 J-1 J-2 8 PVC 150 42 0.27 0P-43 121 J-2 J-3 8 PVC 150 29 0.18 0P-44 185 J-3 J-4 8 PVC 150 25 0.16 0P-45 304 J-3 J-14 8 PVC 150 4 0.03 0P-46 129 J-2 J-25 8 PVC 150 0 0 0P-47 167 J-2 J-24 8 PVC 150 0 0 0P-48 31 J-1 H-1 8 PVC 150 0 0 0P-49 54 J-10 J-9 8 PVC 150 0 0 0P-50 10 J-9 H-3 8 PVC 150 0 0 0

FALLBROOK FARMSACTIVE SCENARIO: MAX DAY DEMAND

LabelFire Flow Iterations

Satisfies Fire Flow

Constraints?

Fire Flow (Needed)

(gpm)

Fire Flow (Available)

(gpm)

Pressure (Residual

Lower Limit) (psi)

Pressure (Calculated

Residual) (psi)

Pressure (Zone Lower Limit) (psi)

Pressure (Calculated Zone Lower Limit) (psi)

Junction w/ Minimum

Pressure (Zone)

Pressure (System Lower Limit) (psi)

Pressure (Calculated

System Lower Limit) (psi)

Junction w/ Minimum Pressure (System)

Is Fire Flow Run

Balanced?

H-2 2 TRUE 1500 3000 20 87 20 89 J-22 (N/A) 89 J-22 TRUEH-4 2 TRUE 1500 3000 20 94 20 93 J-23 (N/A) 93 J-23 TRUEH-5 2 TRUE 1500 3000 20 94 20 96 J-16 (N/A) 96 J-16 TRUEH-1 2 TRUE 1500 3000 20 95 20 97 J-1 (N/A) 97 J-1 TRUEH-3 2 TRUE 1500 3000 20 86 20 86 J-9 (N/A) 86 J-9 TRUEJ-17 2 TRUE 1500 3000 20 98 20 97 J-18 (N/A) 97 J-18 TRUEJ-18 2 TRUE 1500 3000 20 86 20 98 J-17 (N/A) 98 J-17 TRUEJ-15 2 TRUE 1500 3000 20 96 20 95 J-23 (N/A) 95 J-23 TRUEJ-14 2 TRUE 1500 3000 20 97 20 94 J-23 (N/A) 94 J-23 TRUEJ-12 2 TRUE 1500 3000 20 94 20 92 J-23 (N/A) 92 J-23 TRUEJ-11 2 TRUE 1500 3000 20 93 20 91 J-23 (N/A) 91 J-23 TRUEJ-10 2 TRUE 1500 3000 20 89 20 89 H-3 (N/A) 89 H-3 TRUEJ-21 2 TRUE 1500 3000 20 85 20 89 H-3 (N/A) 89 H-3 TRUEJ-20 2 TRUE 1500 3000 20 88 20 92 J-23 (N/A) 92 J-23 TRUEJ-8 2 TRUE 1500 3000 20 92 20 90 J-23 (N/A) 90 J-23 TRUEJ-7 2 TRUE 1500 3000 20 90 20 90 J-23 (N/A) 90 J-23 TRUEJ-26 2 TRUE 1500 3000 20 87 20 90 J-23 (N/A) 90 J-23 TRUEJ-23 2 TRUE 1500 3000 20 83 20 91 J-4 (N/A) 91 J-4 TRUEJ-4 2 TRUE 1500 3000 20 91 20 90 J-23 (N/A) 90 J-23 TRUEJ-6 2 TRUE 1500 3000 20 89 20 88 J-22 (N/A) 88 J-22 TRUEJ-22 2 TRUE 1500 3000 20 82 20 89 J-6 (N/A) 89 J-6 TRUEJ-5 2 TRUE 1500 3000 20 89 20 89 J-22 (N/A) 89 J-22 TRUEJ-19 2 TRUE 1500 3000 20 89 20 95 J-23 (N/A) 95 J-23 TRUEJ-16 2 TRUE 1500 3000 20 96 20 96 H-5 (N/A) 96 H-5 TRUEJ-13 2 TRUE 1500 3000 20 96 20 93 J-23 (N/A) 93 J-23 TRUEJ-1 2 TRUE 1500 3000 20 97 20 97 H-1 (N/A) 97 H-1 TRUEJ-2 2 TRUE 1500 3000 20 94 20 93 J-25 (N/A) 93 J-25 TRUEJ-3 2 TRUE 1500 3000 20 93 20 93 J-23 (N/A) 93 J-23 TRUEJ-25 2 TRUE 1500 3000 20 87 20 94 J-2 (N/A) 94 J-2 TRUEJ-24 2 TRUE 1500 3000 20 88 20 93 J-25 (N/A) 93 J-25 TRUEJ-9 2 TRUE 1500 3000 20 86 20 86 H-3 (N/A) 86 H-3 TRUE

ACTIVE SCENARIO: MAX DAY WITH FIRE FLOW DEMAND

FALLBROOK FARMS

LabelElevation

(ft)Demand


Pressure (psi)

J-17 5266 0 5494 99J-18 5270 0 5494 97J-15 5256 21 5493.97 103J-14 5252 6 5493.96 105J-12 5253 21 5493.96 104J-11 5254 0 5493.96 104J-10 5254 3 5493.96 104J-21 5253 0 5493.96 104J-20 5250 0 5493.96 106J-8 5256 3 5493.95 103J-7 5256 6 5493.95 103J-26 5256 0 5493.95 103J-23 5263 0 5493.95 100J-4 5259 24 5493.95 102J-6 5258 26 5493.95 102J-22 5259 0 5493.95 102J-5 5258 0 5493.95 102J-19 5254 0 5493.97 104J-16 5256 0 5493.97 103J-13 5251 0 5493.96 105J-1 5266 0 5493.99 99J-2 5264 24 5493.97 99J-3 5263 0 5493.96 100J-25 5266 0 5493.97 99J-24 5259 0 5493.97 102J-9 5255 0 5493.96 103

ACTIVE SCENARIO: PEAK HOUR DEMAND

FALLBROOK FARMS

LabelLength

(Scaled) (ft)

Start Node

Stop Node

Diameter (in)

MaterialHazen-

Williams C

Flow (gpm)

Velocity (ft/s)

Headloss Gradient

(ft/ft)

P-7 10 R-1 J-17 8 PVC 150 57 0.36 0P-8 219 J-17 J-18 8 PVC 150 0 0 0P-11 204 J-15 J-14 8 PVC 150 36 0.23 0P-13 119 J-12 J-11 8 PVC 150 17 0.11 0P-14 78 J-11 J-10 8 PVC 150 3 0.02 0P-16 90 J-10 J-21 8 PVC 150 0 0 0P-17 155 J-12 J-20 8 PVC 150 0 0 0P-20 127 J-11 J-8 8 PVC 150 14 0.09 0P-21 108 J-8 J-7 8 PVC 150 16 0.1 0P-22 73 J-7 J-26 8 PVC 150 0 0 0P-24 288 J-8 J-4 8 PVC 150 -5 0.03 0P-25 131 J-4 J-23 8 PVC 150 0 0 0P-27 178 J-6 J-7 8 PVC 150 -10 0.07 0P-28 130 J-6 J-22 8 PVC 150 0 0 0P-31 181 J-4 J-5 8 PVC 150 16 0.1 0P-32 43 J-5 J-6 8 PVC 150 16 0.1 0P-33 31 J-5 H-2 8 PVC 150 0 0 0P-34 166 J-15 J-19 8 PVC 150 0 0 0P-35 28 J-15 J-16 8 PVC 150 -57 0.36 0P-36 418 J-16 J-17 8 PVC 150 -57 0.36 0P-37 61 J-14 J-13 8 PVC 150 38 0.24 0P-38 130 J-13 J-12 8 PVC 150 38 0.24 0P-39 30 J-13 H-4 8 PVC 150 0 0 0P-40 31 J-16 H-5 8 PVC 150 0 0 0P-41 53 R-2 J-1 8 PVC 150 75 0.48 0P-42 207 J-1 J-2 8 PVC 150 75 0.48 0P-43 121 J-2 J-3 8 PVC 150 52 0.33 0P-44 185 J-3 J-4 8 PVC 150 44 0.28 0P-45 304 J-3 J-14 8 PVC 150 7 0.05 0P-46 129 J-2 J-25 8 PVC 150 0 0 0P-47 167 J-2 J-24 8 PVC 150 0 0 0P-48 31 J-1 H-1 8 PVC 150 0 0 0P-49 54 J-10 J-9 8 PVC 150 0 0 0P-50 10 J-9 H-3 8 PVC 150 0 0 0

FALLBROOK FARMSACTIVE SCENARIO: PEAK HOUR DEMAND

LabelElevation

(ft)Demand


Pressure (psi)

J-17 5266 0 5494 99J-18 5270 0 5494 97J-15 5256 0 5494 103J-14 5252 0 5494 105J-12 5253 0 5494 104J-11 5254 0 5494 104J-10 5254 0 5494 104J-21 5253 0 5494 104J-20 5250 0 5494 106J-8 5256 0 5494 103J-7 5256 0 5494 103J-26 5256 0 5494 103J-23 5263 0 5494 100J-4 5259 0 5494 102J-6 5258 0 5494 102J-22 5259 0 5494 102J-5 5258 0 5494 102J-19 5254 0 5494 104J-16 5256 0 5494 103J-13 5251 0 5494 105J-1 5266 0 5494 99J-2 5264 0 5494 100J-3 5263 0 5494 100J-25 5266 0 5494 99J-24 5259 0 5494 102J-9 5255 0 5494 103

ACTIVE SCENARIO: STATIC DEMAND

FALLBROOK FARMS

LabelLength

(Scaled) (ft)

Start Node

Stop Node

Diameter (in)

MaterialHazen-

Williams C

Flow (gpm)

Velocity (ft/s)

Headloss Gradient

(ft/ft)

P-7 10 R-1 J-17 8 PVC 150 0 0 0P-8 219 J-17 J-18 8 PVC 150 0 0 0P-11 204 J-15 J-14 8 PVC 150 0 0 0P-13 119 J-12 J-11 8 PVC 150 0 0 0P-14 78 J-11 J-10 8 PVC 150 0 0 0P-16 90 J-10 J-21 8 PVC 150 0 0 0P-17 155 J-12 J-20 8 PVC 150 0 0 0P-20 127 J-11 J-8 8 PVC 150 0 0 0P-21 108 J-8 J-7 8 PVC 150 0 0 0P-22 73 J-7 J-26 8 PVC 150 0 0 0P-24 288 J-8 J-4 8 PVC 150 0 0 0P-25 131 J-4 J-23 8 PVC 150 0 0 0P-27 178 J-6 J-7 8 PVC 150 0 0 0P-28 130 J-6 J-22 8 PVC 150 0 0 0P-31 181 J-4 J-5 8 PVC 150 0 0 0P-32 43 J-5 J-6 8 PVC 150 0 0 0P-33 31 J-5 H-2 8 PVC 150 0 0 0P-34 166 J-15 J-19 8 PVC 150 0 0 0P-35 28 J-15 J-16 8 PVC 150 0 0 0P-36 418 J-16 J-17 8 PVC 150 0 0 0P-37 61 J-14 J-13 8 PVC 150 0 0 0P-38 130 J-13 J-12 8 PVC 150 0 0 0P-39 30 J-13 H-4 8 PVC 150 0 0 0P-40 31 J-16 H-5 8 PVC 150 0 0 0P-41 53 R-2 J-1 8 PVC 150 0 0 0P-42 207 J-1 J-2 8 PVC 150 0 0 0P-43 121 J-2 J-3 8 PVC 150 0 0 0P-44 185 J-3 J-4 8 PVC 150 0 0 0P-45 304 J-3 J-14 8 PVC 150 0 0 0P-46 129 J-2 J-25 8 PVC 150 0 0 0P-47 167 J-2 J-24 8 PVC 150 0 0 0P-48 31 J-1 H-1 8 PVC 150 0 0 0P-49 54 J-10 J-9 8 PVC 150 0 0 0P-50 10 J-9 H-3 8 PVC 150 0 0 0

FALLBROOK FARMSACTIVE SCENARIO: PEAK HOUR DEMAND


APPENDIX C – Sanitary Sewer Sanitary Demands and Flows

Job No. 14053 Fallbrook FarmsSanitary Sewer Calculations

8/17/20153:38 PM

Page 1 of 1 14053-Sewer Demands Fallbrook 3

Sanitary Sewer Demands for Fallbrook Farms

City of Thornton Standards

low density (less than 5 DU/acre) 3.45 people / unitmid density (5 to 12 DU/ acre) 2.45 people / unit

high density (more than 12 DU/acre) 2.20 people / unit Residential average demand: 80 gal / person / day

Commercial average demand: 600 gal / acreDU = dwelling units

Fallbrook 3 SubdivisionPlanning

AreaLand Use: DU People / Unit No. of People Average Demand

(gal/person/day)

Average Flow (gpd)

Average Flow (gpm)

Average Flow (cfs)

Used Peaking Factor

Peak Flow (gpd)

Peak Flow (cfs)

1 MFD 112 2.45 274 80 21,952 15 0.03 3.50 76,832 0.12Total= 21,952 15 0.03 3.50 76,832 0.12

1 0.12 8 50% 0.50% 0.43 0.85 13.9%

1. Pipes smaller than 15" are designed with no more than 50% maximum flow (q/Q) per 2012 City of Thornton Standards and Specs.

Design Peak flow (q) (cfs)

Pipe Size (in)

q/Qfull

(%)Full Flow Capacity1 Qcap. (cfs)1 Qfull (cfs)Minimum

Pipe Slope


APPENDIX D – Plans Overall Utility Plan

FINAL UTILITY REPORT FALLBROOK FARMS · t 303.561.3333 | f 303.561.3339 | 45 West 2. nd. Avenue,...

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