CONCEPTUAL UTILITY REPORT FOR THE CANYONS PHASE 1 CITY OF CASTLE PINES, CO

Transcription

1 CONCEPTUAL UTILITY REPORT FOR THE CANYONS PHASE 1 CITY OF CASTLE PINES, CO PREPARED FOR: SHEA HOMES 9380 STATION ST., SUITE 600 LONE TREE, CO PHONE: CONTACT: RYAN MCDERMED PREPARED BY: CORE CONSULTANTS, INC W. LITTLETON BOULEVARD, SUITE 109 LITTLETON, CO PHONE: CONTACT: BLAKE CALVERT CORE PROJECT NUMBER: MAY 4, W Littleton Blvd Suite 109 Littleton CO

2 conceptual utility report for the canyons Phase 1 City of Castle PINES, Colorado TABLE OF CONTENTS PAGE CONCEPTUAL UTILITY REPORT I. GENERAL LOCATION AND DESCRIPTION... 3 A. GENERAL... 3 B. SITE LOCATION... 3 C. DESCRIPTION OF PROPERTY... 3 II. LAND USE... 4 A. GENERAL... 4 III. WATER SYSTEM... 5 A. GENERAL... 5 B. MASTER PLANS, WATER DISTRIBUTION SYSTEM... 5 C. DEMAND CATEGORIES, DESIGN CRITERIA... 5 D. WATER SYSTEM MODELING AND ANALYSIS... 7 IV. WASTEWATER COLLECTION SYSTEM... 7 A. GENERAL... 7 B. MASTER PLANS, WASTEWATER COLLECTION SYSTEM... 7 C. FLOW CATEGORIES, DESIGN CRITERIA... 8 D. WASTEWATER SYSTEM MODELING AND ANALYSIS... 9 V. CONCLUSIONS A. COMPLIANCE WITH MASTER PLAN B. VARIANCES C. FINAL UTILITY REPORT VI. REFERENCES Page 1 of W Littleton Blvd Suite 109 Littleton CO

3 conceptual utility report for the canyons Phase 1 City of Castle PINES, Colorado LIST OF APPENDICES APPENDIX A MAPS VICINITY MAP WATER SIMULATION KEY MAP WATER SUPPLY MAP SANITARY SEWER MAP APPENDIX B WATER SYSTEM CALCULATIONS OUTPUT REPORTS PHASE 1, 2, & 3 COMBINED: MAX DAY PEAK HOUR MAX DAY + FIRE FLOW AUTOMATED FIRE FLOW OUTPUT REPORTS PHASE 1 ONLY: MAX DAY PEAK HOUR MAX DAY + FIRE FLOW AUTOMATED FIRE FLOW APPENDIX C WASTEWATER SYSTEM CALCULATIONS WASTEWATER SYSTEM CALCULATIONS Page 2 of W Littleton Blvd Suite 109 Littleton CO

4 conceptual utility report for the canyons Phase 1 City of Castle PINES, Colorado I. GENERAL LOCATION AND DESCRIPTION A. GENERAL The purpose of this Conceptual Utility Report is to present the backbone design of the water and wastewater distribution systems for The Canyons development. This report proposes conceptual locations and sizes for these systems and analyzes the systems using criteria from the Parker Water & Sanitation District s (PWSD) 2014 Water & Wastewater Master Plan. A Final Utility Report will be submitted as the project is refined through the Subdivision process. B. SITE LOCATION The Canyons is a parcel of land in city of Castle Pines encompassing approximately 3,340 acres. The overall site includes 2,500 residential units, 1500 acres of open space, and over 250 acres of mixed use development at the north end of the property near Interstate 25 and Castle Pines Parkway/Hess Road. The first phase of development within the Canyons property will occur in the Shea Homes purchase of Planning Areas 4, 5, 6, and 8 of the approved Canyons PD. Based on the February 28, 2017 Shea Homes Preliminary Plan submittal, Phase I will include approximately 1,098 single family homes split between Shea Homes and other home builders in PAs 6 and 8. Subsequent phases in PAs 7, 9, and 11 will include approximately 902 single family homes (including townhomes) and an elementary school. Mixed-Use development (a combination of an amenity center, 2.1 million square feet of Commercial and a 500 multi-family home entitlement) is part of PA 5 in Phase I and PA s 1, 2, 3 and 4 in Phase 2. C. DESCRIPTION OF PROPERTY The Canyons is currently mostly undeveloped. Interstate 25 is located to the west. Hess Road is to the north. Castle Park Ranch (with several estate homes) is to the east. Happy Canyon Road and access road is to the south. The tributaries of Newlin Gulch Basin pass through the site from southwest to northeast and drain to the Rueter-Hess Reservoir. See Vicinity Map included in Appendix A. Page 3 of W Littleton Blvd Suite 109 Littleton CO

5 conceptual utility report for the canyons Phase 1 City of Castle PINES, Colorado II. LAND USE A. GENERAL Table II-1 shows the proposed land use by Type, per Phase and totaled. TABLE II-1 LAND USE Land Use Type Phase 1 Proposed DU s Phase 1 Proposed Area (Acres) Phase 2 Proposed DU s Phase 2 Proposed Area (Acres) Phase 3 Proposed DU s Total Proposed DU s Total Proposed Area (Acres) Residential, Single Family 1, , Mixed Use Commercial Mixed Use Residential, Multi-family Public Facility (School) Irrigated - Open Space - TOTAL 1, , Table II-2 shows the land use for each Planning Area. A total is done with and without Mixed Use to determine the Average Density of the development, since a portion of the Mixed-Use area will be utilized by the Commercial, but the exact amount is unknown at this time. The Average Density without the Mixed Use will be used for the SFE calculations. TABLE II-2 PLANNING AREAS Planning Area Phase Land Used Type PA 1 3 Mixed Use Commercial Residential, Multi-family PA 2 3 Mixed Use Commercial Residential, Multi-family PA 3 3 Mixed Use Commercial Residential, Multi-family PA 4 3 Mixed Use Commercial Residential, Multi-family Proposed DU s Proposed Area (acres) Page 4 of W Littleton Blvd Suite 109 Littleton CO PA 5 1 Commercial Proposed Density PA 6 1 Residential, Single Family PA 7 2 Elementary School Residential, Single Family Residential, Multi-family

6 conceptual utility report for the canyons Phase 1 City of Castle PINES, Colorado PA 8 1 Residential, Single Family Residential, Multi-family 1, PA 9 2 Residential, Single Family PA 11 2 Residential, Single Family TOTAL - - 2, TOTAL (w/o Mixed Use) - - 2, III. WATER SYSTEM A. GENERAL The Canyons water system will be served by a network of Zone 3 water distributions lines operated by the Parker Water and Sanitation District, primarily within the backbone road system. See Water System Exhibit. B. MASTER PLANS, WATER DISTRIBUTION SYSTEM According to the 2014 PWSD Master Plan, the water distribution system bringing potable water to The Canyons development will consist of the following: Canyons Zone 3 Reservoir PWSD 36 Transmission Line Parker Ridge Pump Station These facilities are currently being bid and constructed by PWSD. The 36 Transmission Line is proposed to cross the southerly end of the site from the reservoir to the east. The Canyons backbone system will have a minimum of two connections to the 36 Transmission line. The Canyons Zone 3 Reservoir has a High Water Level (HWL) of 6592 feet and a Low Water Level (LWL) of 6570 feet. C. DEMAND CATEGORIES, DESIGN CRITERIA Water consumption demands, from Table 3-4, Water System Design Values of the 2009 PWSD Master Plan, were used for the Average Day Demands (ADD) and peaking factors as shown below in Table III-1. TABLE III-1 WATER SYSTEM DESIGN VALUES Criteria Average Day Demand (ADD) per SFE Maximum Daily Demand (MDD) Factor Peak Hour Demand (PHD) Factor Ideal Minimum System at (PHD) Ideal Maximum System Minimum Fire Flow at (MDD) + Fire Flow Demand Maximum Pipeline Velocity at (PHD) Value 400 gallons per day (gpd) 2.5 times ADD 5.0 times ADD 40 psi 150 psi 20 psi 10 feet per second Page 5 of W Littleton Blvd Suite 109 Littleton CO

7 conceptual utility report for the canyons Phase 1 City of Castle PINES, Colorado The following Single Family Equivalents were used to calculate Water Demands. TABLE III-2 SINGLE FAMILY EQUIVALENTS Criteria Single Family Factor Town-home Factor Multi-family Factor Commercial Factor Elementary School Factor High School Factor Value 1.0 / unit 1.0 / unit 0.75 / unit 3.0 / acre 15 / School 115 / School Parameters used with the model of The Canyons water system are now as follows: Average Day Demand (ADD) is the total water use during a year divided by the number of days in a year (365). Maximum Day Demand (MDD) is the highest demand occurring on a single day during the year and typically occurs in the summer months (June August). MDD was used to size water pipelines (along with fire flows). Peak Hour Demand (PHD) is the highest hourly demand occurring during the year and can take place during the maximum day. PHD is used to determine the future size of storage tank facilities. In addition to the parameters above, fire flows were analyzed (along with the Maximum Day Demand) as follows: Fire Flow Demand (FFD) - Fire flow requirements within PWSD are dictated by the South Metro Fire Rescue Authority (South Metro) and the International Fire Code (IFC). Fire flow demands (FFD) vary depending on building usage (residential versus commercial), building square footage, and type of building construction and are defined in Appendix B of the IFC. In addition, the IFC required total fire flow can be reduced by 50% if the building is provided with fire sprinklers. Only Commercial, School, and Residential, Multi-Family are anticipated to have sprinklers within The Canyons development. Fire flow values were referenced from Table 5-6, Water System Evaluation Parameters of the 2014 PWSD Master Plan and listed below. Page 6 of W Littleton Blvd Suite 109 Littleton CO

8 conceptual utility report for the canyons Phase 1 City of Castle PINES, Colorado TABLE III-3 FIRE FLOW DEMANDS Criteria Residential < 3,600 SF Residential - 3,600 SF 4,800 SF Residential - 4,800 SF 6,200 SF Multi-family Commercial / Parks Fire Flow 1,000 gpm 1,750 gpm 2,000 gpm 2,500 GPM 3,000 GPM D. WATER SYSTEM MODELING AND ANALYSIS The water system was modeled using Water CAD software. The Water CAD runs are included in Appendix B along with a Key Map to the simulation. Simulations were run for the following: Max Day Peak Hour Max Day + Fire Flow Automated Fire Flow These simulations were run for the combined Phase 1, 2, and 3 model first, and then checked again for just the Phase 1 model to be sure they met the Water System parameters. IV. WASTEWATER COLLECTION SYSTEM A. GENERAL The Canyons wastewater system will be served backbone gravity sanity sewer lines, lift stations and force mains operated by the Parker Water and Sanitation District, within both the backbone road system and in access roads along the perimeter of the tracts. See Wastewater System Exhibit. B. MASTER PLANS, WATER DISTRIBUTION SYSTEM According to the 2014 PWSD Master Plan, the wastewater collection system serving The Canyons development will consist of the following: 10 /12 /15 Sanitary Sewers West Newlin Gulch Lift Station (a.k.a. Canyons West L.S.) Newlin Gulch Lift Station (a.k.a. Canyons East L.S.) Force Mains The outfall facilities (Sanitary Sewer and Force Main) from The Canyons to the east are currently being bid and constructed by PWSD. Page 7 of W Littleton Blvd Suite 109 Littleton CO

9 conceptual utility report for the canyons Phase 1 City of Castle PINES, Colorado C. DEMAND CATEGORIES, DESIGN CRITERIA Waste water demands, were taken from both Table 4-1, Sanitary Sewer System Design Criteria of the 2009 PWSD Master Plan and Table 6-3, Wastewater Collection System Evaluation Parameters of the 2014 PWSD Master Plan. TABLE IV-1 - WASTEWATER COLLECTION SYSTEM EVALUATION PARAMETERS Flow Parameters Average Wastewater Flows Parameter Value 260 GPD / SFE Peak Flows (10-Year Storm Frequency) Average Day Flow * 3.2 Infiltration 200 gallons per acre per day Gravity Flow Pipe Parameters Minimum Pipe Size 8 inch Manning s Roughness Coefficient Maximum Flow in Pipe (d/d) 0.80 Maximum Pipe Velocity 10 ft./s Force Main Parameters Hazen-William C Factor 120 Maximum Pipe Velocity During Peak Flows 8 ft./s The following Single Family Equivalents were used to calculate Sanitary Demands. TABLE IV-2 SINGLE FAMILY EQUIVALENTS Criteria Single Family Factor Town-home Factor Multi-family Factor Commercial Factor Elementary School Factor High School Factor Value 1.0 / unit 1.0 / unit 0.75 / unit 3.0 / acre 25 / School 115 / School Parameters used with the model of The Canyons water system are now as follows: Average Day (AD) flows are the total wastewater flows generated in a year divided by the number of days in a year (365). AD flows, or base flows, are contributed to the collection system from residential, commercial, and public (institutional) sources. Peak Hour (PH) is the highest hourly demand occurring during the year and, like the PWSD Master Plan, include the 10-year storm return Page 8 of W Littleton Blvd Suite 109 Littleton CO

10 conceptual utility report for the canyons Phase 1 City of Castle PINES, Colorado frequency flows. These flows were used for analysis of the sanitary sewer system. D. WASTEWATER SYSTEM MODELING AND ANALYSIS The wastewater system was modeled using an Excel spreadsheet. The runs are included in Appendix C. Sewers are sized assuming a relatively flat grade from a table at the bottom showing Sewer Size / Pipe Slope / Flow, since the exact slope of the sewers have yet to be determined. Although the force mains are sized hereon in order to determine the expected surcharge on the gravity system, a more detailed evaluation is being prepared as part of the Lift Station and Force Main designs. V. CONCLUSIONS A. COMPLIANCE WITH MASTER PLAN The proposed water and wastewater layouts presented in the report provide systems which are in substantial conformance with the 2014 PWSD Master Plan. B. VARIANCES No variances associated with the proposed water and wastewater design are being requested. C. FINAL UTILITY REPORT The layout and design of the water and wastewater system proposed in this report, although in conformance with Parker Water & Sanitation District criteria, is general in nature. Once a more refined design for the development is available, a Final Utility Report shall be prepared and submitted with a final plat and construction drawings. Page 9 of W Littleton Blvd Suite 109 Littleton CO

11 conceptual utility report for the canyons Phase 1 City of Castle PINES, Colorado REFERENCES A. Parker Water & Sanitation District 2014 Water & Wastewater Master Plan, Prepared by Providence Infrastructure Consultants. B. Parker Water & Sanitation District 2009 Water & Sewer Master Plan, Prepared by Integra Engineering. C. The Canyon Planned Development, North Canyons, LLLP, Revised November Computer Programs: D. Bentley Water CAD V8i SELECT series 5, 2013 Bentley Systems, Incorporated. E. Excel by Microsoft, Inc. Page 10 of W Littleton Blvd Suite 109 Littleton CO

12 conceptual utility report for the canyons Phase 1 City of Castle PINES, Colorado APPENDIX A MAPS VICINITY MAP WATER SIMULATION KEY MAP WATER SUPPLY MAP SANITARY SEWER MAP 1950 W Littleton Blvd Suite 109 Littleton CO

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14 P-428 P-86 P-218 P-128 P-225 Ph III J-168 P-262 3F 27.8 Acres P-261 J-171 Ph III P-267 P-266 J-173 J GPM FIRE FLOW J-157 Ph III 487 MF UNITS 45.0 Comm. Acres 3000 GPM FIRE FLOW J-13 J-157 3C P Comm. Acres P-4 3E J Comm. Acres J-12 P-152 P-241 P-383 P-237 P-158 J-115 J-219 P-382 P-3 Ph II P-159 2C J-11 J-117 J-119 P-245 P-242 J-159 3A J-118 P-380 P-154 P-257 P-160 P-379 P-246 2B J-10 J-161 P-240 P-244 J-216 P-148 P MF UNITS 20.9 Comm. Acres Ph III J-110 J-116 J-214 J-109 J-156 P-431 J-158 P-243 J-160 P-153 P-147 P-258 J D Comm. Acres P-247 Ph I Ph Il P-157 J-169 P-271 P-270 P-268 P-432 J-111 J-220 P-385 J-14 2A J-114 J-162 P-269 J-112 P-259 J-170 J-174 P-239 3B J-135 P-248 P-190 P-260 P-230 J-9 65 MF UNITS J-18 P-151 P-150 J-223 P J-164 Comm. Acres J-165 Ph lli P-233 J-113 P-395 P-188 1B 3H Ph I 15.2 Comm. Acres J-134 J-225 P-249 J-166 P-232 P-253 P-187 P-393 J-133 J-224 P-396 P-186 J-132 P-398 P-399 J-226 P-400 J MF UNITS 3G 10.9 Comm. Acres J-167 P-255 J-163 P-250 P-251 J-154 P-275 J-17 J-62 J-222 P-392 P-77 P-183 P-185 P-407 J-40 P-402 P-256 1G P-274 P-252 1H J-131 J Acres J-227 J-41 J GPM FIRE FLOW J-154 J-177 P-27 J-229 P-408 P-184 P-49 P-406 P-41 P-42 P-405 P I Acres J-16 J-228 J-130 J-128 J-129 J-42 1A J-221 J-66 J-242 1E J-48 P-182 P-180 P-229 P-179 P-403 P-404 P-387 P-411 P-51 P-26 P-72 J-49 P-166 P-389 P-424 P-82 J-31 P-84 1C P-181 P-425 P-409 P-410 J-59 J-65 J-45 J-230 P-83 P-52 J-67 J-15 P-47 P-13 P-30 P-198 P-426 P-165 J-2 P-73 P-24 1J J-121 J-46 P-14 P-25 P-57 J-7 J-3 J-123 1N J-64 P-11 P-12 J-138 P-60 P-199 P-81 J-4 J-5 P-168 Ph I P-9 P-376 P-58 J-51 Ph Il P-113 P-263 P-375 J-172 J-6 P-10 J-139 J-55 J-212 P-439 1D P-59 J-240 P-85 J-250 J-50 P-216 P-200 J-90 P-89 P-66 P-437 P-436 1F P Acres P-458 P-265 P-264 J-29 J-27 P-423 P-462 J-60 P-21 P-421 J-69 J-249 P-217 P-422 1K 1O 1L 2.4 1R Acres 2D J-147 P-133 J-91 P-91 J-74 J-241 J-73 J-248 P-441 J-54 P-442 J-92 J-103 2I P-88 P-92 P-132 J-68 J-72 P-87 P-169 P-115 J-108 J-70 P-98 P-433 J-252 P-444 P-457 J-253 P-170 P-97 P-456 P-67 P-143 J-71 J-78 J-257 P-455 J-125 J-124 P-93 P-463 P-420 J-58 P-452 J-256 J-93 J-239 P-69 J-57 P-116 J-75 P-96 J Acres J-136 J-146 J-148 2G J-94 P-94 P-95 P-192 P-71 P-193 J-26 P-215 P-219 1M P-214 2L P-194 J-95 1Q P-416 1P J-25 Ph I P-127 J-96 J-235 P-140 P-276 J-106 P-212 J-237 P-417 J-76 P-418 Ph II P-226 J-145 P-118 J-98 P-213 2E P-415 J-24 P-19 2G 1Q J-105 1Q J-151 J-86 J-97 J-23 J-100 J-88 J-140 2K 2H J-79 J-99 J-104 J-87 2F J-22 J-141 J-89 J-81 J-84 J-144 J-101 J-102 J-142 J-82 J-178 P-18 P-120 P-138 P-126 P-210 P-277 P-413 P-108 P-124 P-206 P-224 P-202 P-135 J-234 P-220 P-109 P-201 P-209 J-143 J-149 P-107 P-123 P-211 P-136 J-233 P-203 P-207 P-221 P-204 P-111 P-222 P-110 P-17 P-412 P-205 P-208 P-102 P-104 P-100 J-80 2J P-129 P-223 J-150 P-130 P-103 P-101 J-21 J-85 J-83 P-429 P-16 J-246 J-20 P-15 J-19 T-1 P-145 MAX DAY + LOOP P-145 LEGEND: 36" J-XX J-XX J-XX J-XX J-XX DEVELOPMENT PHASE BOUNDARY BASIN BOUNDARY (OUTER) WATER TRANSMISSION LINE JUNCTION ELEVATION <= 6, JUNCTION ELEVATION <= 6, JUNCTION ELEVATION <= 6, JUNCTION ELEVATION <= 6, JUNCTION ELEVATION <= 6, J-1 P-142 P-273 J-176 P-272 SCHOOL J-107 Ph II RESIDENTIAL - SINGLE FAMILY P-1 T-2 P-146 J-30 RESIDENTIAL - TOWN HOMES MIX (COMM. / MULTI-FAMILY) PARK COMMERCIAL SCALE 1" = 500' WATER SIMULATION KEY MAP

15 Ph III 487 MF UNITS 45.0 Comm. Acres J " 3C Ph III 3E 30 Comm. Acres J Comm. Acres J J J-118 J-117 J " 2C Elementary School 25 SFE's J-168 J MF UNITS 20.9 Comm. Acres 18 J D Comm. Acres 12 J-220 J J-114 J-110 J-175 J-156 J J-109 J-14 J-10 J-158 J-169 J-11 J J-159 Town Homes 3A Ph II J B Town Homes J-219 Ph Il 12" 12" Ph III J-162 Ph I Ph Il Ph I J-112 2A 19 J-170 J-174 3B J " J-9 65 MF UNITS 3F 27.8 Acres J Comm. Acres J " 3H Ph lli Ph I Amenity Center 12" 39 MF UNITS G Comm. Acres J-167 J " J-164 J-171 J-154 1G 15.2 Comm. Acres 1H J Town J-177 J-134 Homes Ph III J-8 1I Park 2.6 J-66 Acres 8 J J J J J-6 23 J-65 J K 10 1J J J-172 J J-69 7 J-61 8 J J-256 J-27 J-55 J J-57 Park 1R 2.4 Acres J-113 J J-5 J-141 J-132 J J-250 J-242 2K 13 12" 11 J J J-99 J J-21 J F 10 J-16 1E J-104 J J-4 J J-106 J J B J-47 J-98 1C 1D 8 13 J-234 J-130 J-46 J-97 J S 9 J J-84 3 J-125 2G 8 J-62 Park A J-45 J-3 J-51 2J Acres 14 J J-92 J J J-229 J-81 J-222 1A J J-223 J-101 J J J-129 J-230 J-83 J-224 J D J-82 J J J-42 J-143 J-41 J-80 J J J-225 J-226 J J " 2H J J J J-124 2E J-91 8 J-148 J-88 J-149 J J Ph I J-90 J J-31 2G 6 J J J-87 J-150 J-153 Ph Il 54 J-93 Town I 14 Homes 26 Acres Regional Park 12" 2F Regional Park L Acres 21 J-108 J-79 J-1 1N J-7 J-212 J-54 9 J J-240 J " J-72 J J-70 J J J-248 1L 1O J-239 J J-252 J J-58 12" J J M J J-26 J-77 1Q 1P Ph I J-237 J-76 J-235 J J Ph II 1Q J-238 1Q J J-100 J J " J-22 12" J-20 J-19 T-1 36" Ph Il J-14 Ph I FUTURE PWSD TANK SITE 12" LEGEND: 8" 12" 36" J OUTER MARKER RD. 12" J-1 DEVELOPMENT PHASE BOUNDARY BASIN BOUNDARY (OUTER) BASIN BOUNDARY (INNER) WATER LINE (8" DIAMETER) WATER LINE (12" DIAMETER) WATER TRANSMISSION LINE ELEMENTARY SCHOOL (25 SFE'S) 12" 36" Ph Il RESIDENTIAL - SINGLE FAMILY (1 SFE/UNIT) RESIDENTIAL - TOWN HOMES (1 SFE/UNIT) 2I 16.4 Acres Regional Park 12" J-30 T-2 J " J-30 T-2 J-107 Ph II MIXED (COMM (3 SFE/ACRE) & MF (0.75 SFE'S/UNIT)) PARK (3 SFE/ACRE) 36" COMMERCIAL (3 SFE/ACRE) SCALE 1" = 500' Water Supply Map Conceptual Utility Report

16 66 Ph III 3F 27.8 Acres Ph III INTERSTATE 25 Ph III 487 MF UNITS 3C2 3C1 3E 30 Comm. Acres 45.0 Comm. Acres 23.1 Comm. Acres J-13 J-16 3A Ph II 48 2B Town J-7 Homes C Elementary School J MF UNITS 20.9 Comm. Acres Ph III 12" Town J-10 Homes J-8 Ph Il D Comm. Acres J-11 Ph I Ph Il 2A Ph I J J-18 3B 12" Ph lli J-14 J-12 J-6 Ph I J-5 52 J B Amenity Center 3G 10.9 Comm. Acres 39 MF UNITS 1G 15.2 Comm. Acres 42 1H J-4 Town Homes 42 J J-1 41 J-22 J-19 J-20 * PS-W 17.6 J-32 Comm. 4 J-21 Acres 10" FM J-30 3H 65 MF J-28 9 UNITS 12" 12" 1I Park J-27 J J-26 Acres 82 12" 3G 28 J-24 1E J S Park A 5.2 Acres J A 93 1C J J-40 J-42 1J J N 6 10" FM Ph I J J-44 8 Ph Il J K 1D 1F J-45 J D 1L Paired Homes 1O J-76 J K Park 1R 2.4 Acres J-46 Regional Park I Acres J J J J " FM 12" J-48 J-47 J J Q 18 J P J M J Ph I J-62 J G 12" Ph II J J-96 2E G Town Homes J-60 Regional Park L Acres 1Q 8 J-105 J-82 1Q J J J-83 * J-84 J " J PS-E 2K 2H J " FM J J J J-94 2F J J J-101 J J 10 J-92 J " FM LEGEND: COMMERCIAL (3 SFE/ACRE) ELEMENTARY SCHOOL (25 SFE'S) RESIDENTIAL - SINGLE FAMILY (1 SFE/UNIT) RESIDENTIAL - TOWN HOMES (1 SFE/UNIT) MIXED (COMM (3 SFE/ACRE) & MF (0.75 SFE'S/UNIT)) PARK (3 SFE/ACRE) DEVELOPMENT PHASE BOUNDARY SANITARY SEWER HIGH POINT SANITARY SEWER (8" DIAMETER) SANITARY SEWER LOW POINT SANITARY SEWER HIGH POINT SANITARY SEWER TRIBUTARY BOUNDARY 10"-12" SANITARY SEWER (SIZE AS NOTED) J-90 Ph II 2-10" SANITARY SEWER FORCE MAIN (# AND SIZE AS NOTED) * LIFT STATION SCALE 1" = 500' Sanitary Sewer Conceptual Utility Report

17 conceptual utility report for the canyons Phase 1 City of Castle PINES, Colorado APPENDIX B WATER SYSTEM CALCULATIONS WATER SYSTEM DESIGN CRITERIA WATER DEMAND TABLE WATER CAD TABLES OUTPUT REPORTS PHASE 1,2, AND 3 COMBINED: MAX DAY PEAK HOUR MAX DAY + FIRE FLOW AUTOMATED FIRE FLOW WATER CAD TABLES OUTPUT REPORTS PHASE 1 ONLY: MAX DAY PEAK HOUR MAX DAY + FIRE FLOW AUTOMATED FIRE FLOW 1950 W Littleton Blvd Suite 109 Littleton CO

18 Water System Design Criteria Single or Multi-Family Residential Demand Factor gpd /SFE gpm /SFE Average Daily Water Demand (ADD) Maximum Daily Flow (ADD x 2.5) Peak Hour (MDF x 5.0) ADD based on Parker 2009 Master Plan Table 3-4 Fire Flow Demand (2014 Master Plan Table 5-6) FF Residential < 3,600 SF 1000 Residential - 3,600 to 4, Residential - 4,800 to 6, Multifamily 2500 Commercial 3000 Single Family Equivalent Assumptions SFE's Unit Single Family 1 per unit Multi-family 0.75 per unit Commercial / Public Facilities (Parks) 3 per gross acre Elementary School 25 per school High School 115 per school

19 Phase / Basin Junction (Highlighted cells have multiple Water Demand Table SFE's / (DU/ac) c Total SFE's d (a or b)*c Total ADD e d*400/24/60 Max Day f e x 2.5 Peak Hour g e x 5 demands) Land Use DU's a Acres b Elevation 1A J 129 Residential 56x , A J 045 Residential 56x , A J 229 Residential 56x , A J 222 Residential 56x , A J 223 Residential 56x , A J 224 Residential 56x , A J 040 Residential 56x , A J 041 Residential 56x , A J 128 6, A J 225 Residential 51x , A J 226 Residential 51x , A J 031 Residential 46x , A J 042 Residential 46x , A J 230 Residential 46x , A J 221 Residential 46x , A J 228 Residential 46x , A J 227 Residential 46x , A J 153 6, A J 001 6, A J 228 Residential 45x , A J 227 Residential 45x , A J 031 Residential 45x , B J 017 Residential 61x , B J 018 Residential 61x , B J 062 Residential 61x , B J 113 Residential 61x , C J 047 Residential 51x , C J 130 Residential 51x , C J 046 Residential 51x , C J 121 Residential 51x , D J 050 Residential 86x , D J 051 Residential 86x , D J 123 Residential 86x , E J 048 Residential 51x , E J 049 Residential 51x , E J 131 Residential 51x , E J 242 Residential 51x , F J 249 Residential 51x , F J 250 Residential 51x , G J 154 Commercial , G J 135 6, H J 177 Townhomes , H J 133 6, H J 134 6, I J 008 Park , J J 066 Residential 61x , J J 067 Residential 61x , J J 064 Residential 61x , J J 065 Residential 61x , J J 005 Residential 61x , J J 212 Residential 61x , K J 026 Residential 30x80 1 6, K J 027 Residential 30x , K J 057 Residential 30x , K J 058 Residential 30x , Page 1 of 4

20 Phase / Basin Junction (Highlighted cells have multiple demands) Water Demand Table SFE's / (DU/ac) c Total SFE's d (a or b)*c Total ADD e d*400/24/60 Max Day f e x 2.5 Peak Hour g e x 5 Land Use DU's a Acres b Elevation 1K J 256 Residential 30x , K J 253 Residential 30x , K J 257 Residential 30x , K J 252 Residential 30x , K J 029 Residential 30x , L J 069 Residential 51x , L J 073 Residential 51x , L J 078 Residential 51x , L J 248 Residential 51x , M J 025 Residential 51x , M J 136 Residential 51x , N J 007 Residential 56x , N J 059 Residential 56x , N J 060 Residential 56x , N J 061 Residential 56x , N J 173 Residential 56x , N J 172 Residential 56x , N J 139 Residential 56x , N J 138 Residential 56x , O J 068 Residential 61x , O J 239 Residential 61x , O J 071 Residential 61x , O J 240 Residential 61x , O J 241 Residential 61x , O J 072 Residential 61x , O J 074 Residential 61x , P J 075 Residential 61x , P J 077 Residential 61x , P J 235 Residential 61x , Q J 023 Residential 71x , Q J 024 Residential 71x , Q J 076 Residential 71x , Q J 105 Residential 71x , Q J 237 Residential 71x , R J 054 Park , A J 112 Residential 56x , A J 114 Residential 56x , A J 116 Residential 56x , A J 117 Residential 56x , A J 118 Residential 56x , A J 220 Residential 56x , A J 214 Residential 56x , A J 110 Residential 51x , A J 111 Residential 51x , A J 219 Residential 51x , A J 115 Residential 51x , A J 216 Residential 51x , B J 119 Townhomes , C J 109 High School , C J 013 6, C J 014 6, D J 090 Residential 86X , D J 092 Residential 86X , D J 103 Residential 86X , D J 124 Residential 86X , D J 125 Residential 86X , Page 2 of 4

21 Phase / Basin Junction (Highlighted cells have multiple demands) Water Demand Table SFE's / (DU/ac) c Total SFE's d (a or b)*c Total ADD e d*400/24/60 Max Day f e x 2.5 Peak Hour g e x 5 Land Use DU's a Acres b Elevation 2D J 147 Residential 86X , E J 178 Townhomes , F J 079 Residential 46x , F J 080 Residential 46x , F J 087 Residential 46x , F J 150 Residential 46x , F J 176 Residential 46x , G J 097 Residential 61x , G J 098 Residential 61x , G J 101 Residential 61x , G J 106 Residential 61x , G J 148 Residential 61x , G J 146 Residential 61x , G J 145 Residential 61x , G J 234 Residential 61x , H J 080 Residential 51x H J 081 Residential 51x , H J 086 Residential 51x , H J 087 Residential 51x H J 088 Residential 51x , H J 089 Residential 51x , H J 095 Residential 51x , H J 096 Residential 51x , H J 102 Residential 51x , H J 142 Residential 51x , H J 144 Residential 51x , H J 143 Residential 51x , H J 149 Residential 51x , I J 002 Park , J J 083 Residential 61x , J J 084 Residential 61x , J J 085 Residential 61x , J J 233 6, J J 246 6, K J 021 Residential 71x , K J 022 Residential 71x , K J 099 Residential 71x , K J 104 Residential 71x , K J 141 Residential 71x , K J 140 Residential 71x , K J 151 Residential 71x , L J 107 Park , Page 3 of 4

22 Phase / Basin Junction (Highlighted cells have multiple demands) Water Demand Table SFE's / (DU/ac) c Total SFE's d (a or b)*c Total ADD e d*400/24/60 Max Day f e x 2.5 Peak Hour g e x 5 Land Use DU's a Acres b Elevation 3A J 160 Townhomes , A J 159 6, A J 011 6, A J 158 6, B J 174 Mixed (Comm) B J 174 Mixed (MF) B J 174 Mixed (Total) , C J 157 Mixed (Comm) C J 157 Mixed (MF) C J 157 Mixed (Total) , D J 175 Commercial , E J 168 Commercial , F J 171 Commercial , G J 167 Mixed (Comm) G J 167 Mixed (MF) G J 167 Mixed (Total) , H J 166 Mixed (Comm) H J 166 Mixed (MF) H J 166 Mixed (Total) , Page 4 of 4

23 conceptual utility report for the canyons Phase 1 City of Castle PINES, Colorado WATER CAD TABLES PHASE 1,2, AND 3 COMBINED: MAX DAY PEAK HOUR MAX DAY + FIRE FLOW AUTOMATED FIRE FLOW 1950 W Littleton Blvd Suite 109 Littleton CO

24 Phase 1, 2, and 3 Max Day Junction Report Elevation (ft) Zone Demand (ft) (psi) J 1 6, A 0 6, J 2 6, I , J 3 6, D 0 6, J 4 6, D 0 6, J 5 6, J , J 6 6, J 0 6, J 7 6, N , J 8 6, I , J 9 6, B 0 6, J 10 6, C 0 6, J 11 6, A 0 6, J 12 6, A 0 6, J 13 6, C 0 6, J 14 6, C 0 6, J 15 6, E 0 6, J 16 6, E 0 6, J 17 6, B , J 18 6, B 0 6, J 19 6, J 0 6, J 20 6, J 0 6, J 21 6, K , J 22 6, K , J 23 6, Q , J 24 6, Q , J 25 6, M , J 26 6, K 0 6, J 27 6, K , J 29 6, K , J 30 6, , J 31 6, A , J 40 6, A , J 41 6, A , J 42 6, A , J 45 6, A , J 46 6, C , J 47 6, C , J 48 6, E , J 49 6, E 0 6, J 50 6, D , J 51 6, D , J 54 6, R 5 6, J 55 6, J 0 6, J 57 6, K ,

25 Phase 1, 2, and 3 Max Day Junction Report Elevation (ft) Zone Demand (ft) (psi) J 58 6, K , J 59 6, N , J 60 6, N , J 61 6, N , J 62 6, B , J 64 6, J , J 65 6, J , J 66 6, J , J 67 6, J , J 68 6, O , J 69 6, L , J 70 6, O 0 6, J 71 6, O , J 72 6, O , J 73 6, L , J 74 6, O , J 75 6, P , J 76 6, Q 0 6, J 77 6, P , J 78 6, L , J 79 6, F , J 80 6, F , J 81 6, H , J 82 6, J 0 6, J 83 6, J , J 84 6, J , J 85 6, J , J 86 6, H , J 87 6, H , J 88 6, H , J 89 6, H , J 90 6, D , J 91 6, D 0 6, J 92 6, D , J 93 6, G 0 6, J 94 6, G 0 6, J 95 6, H , J 96 6, H , J 97 6, G , J 98 6, G , J 99 6, K , J 100 6, Q 0 6, J 101 6, G ,

26 Phase 1, 2, and 3 Max Day Junction Report Elevation (ft) Zone Demand (ft) (psi) J 102 6, H , J 103 6, D , J 104 6, K , J 105 6, Q , J 106 6, G , J 107 6, L , J 108 6, , J 109 6, C , J 110 6, A , J 111 6, A , J 112 6, A , J 113 6, B , J 114 6, A , J 115 6, A 10 6, J 116 6, A , J 117 6, A , J 118 6, A , J 119 6, B , J 121 6, C , J 123 6, D , J 124 6, D , J 125 6, D , J 128 6, A 0 6, J 129 6, A , J 130 6, C , J 131 6, E , J 132 6, E 0 6, J 133 6, H 0 6, J 134 6, H 0 6, J 135 6, G 0 6, J 136 6, M , J 138 6, N , J 139 6, N , J 140 6, K , J 141 6, K , J 142 6, H , J 143 6, H , J 144 6, H , J 145 6, G , J 146 6, G , J 147 6, D , J 148 6, G , J 149 6, H ,

27 Phase 1, 2, and 3 Max Day Junction Report Elevation (ft) Zone Demand (ft) (psi) J 150 6, F , J 151 6, K , J 153 6, A 0 6, J 154 6, G , J 156 6, C 0 6, J 157 6, C , J 158 6, A 0 6, J 159 6, A 0 6, J 160 6, A 25 6, J 161 6, B 0 6, J 162 6, B 0 6, J 163 6, B 0 6, J 164 6, B 0 6, J 165 6, B 0 6, J 166 6, H , J 167 6, G , J 168 6, E , J 169 6, D 0 6, J 170 6, D 0 6, J 171 6, F , J 172 6, N , J 173 6, N , J 174 6, B , J 175 6, D , J 176 6, F , J 177 6, H , J 178 6, E , J 212 6, J , J 214 6, A , J 216 6, A , J 219 6, A , J 220 6, A , J 221 6, A , J 222 6, A , J 223 6, A , J 224 6, A , J 225 6, A , J 226 6, A , J 227 6, A , J 228 6, A , J 229 6, A , J 230 6, A , J 233 6, J 0 6,

28 Phase 1, 2, and 3 Max Day Junction Report Elevation (ft) Zone Demand (ft) (psi) J 234 6, G , J 235 6, P , J 237 6, Q , J 239 6, O , J 240 6, O , J 241 6, O , J 242 6, E , J 246 6, J 0 6, J 248 6, L , J 249 6, F , J 250 6, F , J 252 6, K , J 253 6, K , J 256 6, K , J 257 6, K , Total Min (40) J 30 Max (150) J 100

29 Phase 1, 2, and 3 Elevation (Minimum) (ft) Max Day Tank Report Elevation (Maximum) (ft) Elevation (Base) (ft) Elevation (Initial) (ft) Flow (Out net) (ft) T-1 6,500 6, , , , T-2 6,500 6, , , ,549.00

30 Phase 1, 2, and 3 Max Day Pipe Report Hazen Williams C (Start) (ft) (Stop) (ft) Headloss Gradient (ft/1000ft) Length (ft) Start Stop Dia. (in) Material Flow Velocity (ft/s) P 1 1,600 J 30 J 1 12 PVC 130 1, , , P 3 1,690 J 14 J 13 8 PVC , , P J 13 J 12 8 PVC , , P 9 1,247 J 7 J 6 12 PVC , , P J 6 J PVC , , P J 5 J 4 12 PVC , , P J 4 J 3 12 PVC , , P 13 1,448 J 3 J 2 12 PVC , , P J 2 J 1 12 PVC , , P J 19 J PVC 130 1, , , P J 20 J PVC 130 1, , , P 17 1,196 J 21 J PVC , , P J 23 J PVC , , P J 24 J PVC , , P J 27 J 29 8 PVC , , P J 65 J 64 8 PVC , , P J 4 J PVC , , P J 15 J PVC , , P J 16 J PVC , , P J 2 J 31 8 PVC , , P J 40 J 41 8 PVC , , P J 41 J 42 8 PVC , , P J 45 J 46 8 PVC , , P J 47 J 16 8 PVC , , P J 16 J 48 8 PVC , , P J 48 J 49 8 PVC , , P J 49 J 15 8 PVC , , P J 3 J 45 8 PVC , , P J 4 J 50 8 PVC , , P J 50 J 51 8 PVC , , P J 51 J 3 8 PVC , , P J 55 J PVC , , P J 54 J PVC , , P J 57 J PVC , , P J 58 J 26 8 PVC , , P J 8 J PVC , , P J 59 J 7 12 PVC , , P 77 1,066 J 17 J 62 8 PVC , , P J 64 J 6 8 PVC , , P J 65 J 67 8 PVC , , P J 67 J 59 8 PVC , , P J 67 J 66 8 PVC , , P J 29 J 69 8 PVC , , P J 70 J 71 8 PVC , ,

31 Phase 1, 2, and 3 Max Day Pipe Report Hazen Williams C (Start) (ft) (Stop) (ft) Headloss Gradient (ft/1000ft) Length (ft) Start Stop Dia. (in) Material Flow Velocity (ft/s) P J 71 J 72 8 PVC , , P J 72 J 68 8 PVC , , P J 69 J 73 8 PVC , , P J 74 J 72 8 PVC , , P J 73 J 70 8 PVC , , P J 70 J 75 8 PVC , , P J 75 J 76 8 PVC , , P 95 1,104 J 24 J 77 8 PVC , , P J 77 J 75 8 PVC , , P J 69 J 78 8 PVC , , P J 78 J 70 8 PVC , , P J 82 J 80 8 PVC , , P J 82 J 83 8 PVC , , P J 84 J 81 8 PVC , , P J 83 J 85 8 PVC , , P J 85 J 84 8 PVC , , P J 87 J 79 8 PVC , , P J 86 J 88 8 PVC , , P J 88 J 87 8 PVC , , P J 80 J 89 8 PVC , , P J 89 J 87 8 PVC , , P J 2 J 90 8 PVC , , P J 91 J 93 8 PVC , , P J 93 J 94 8 PVC , , P J 95 J 86 8 PVC , , P J 98 J 97 8 PVC , , P J 22 J PVC , , P J 100 J PVC , , P J 97 J PVC , , P J 101 J 96 8 PVC , , P J 95 J 96 8 PVC , , P J 81 J PVC , , P J 102 J 82 8 PVC , , P J 90 J 91 8 PVC , , P J 92 J PVC , , P J 103 J 91 8 PVC , , P 135 1,069 J 98 J PVC , , P J 104 J 99 8 PVC , , P J 105 J 23 8 PVC , , P J 98 J PVC , , P J 107 J PVC , , P J 108 J 93 8 PVC , , P J 19 T 1 36 Steel 120 1, , , P T 2 J Steel 120 1, , ,

32 Phase 1, 2, and 3 Max Day Pipe Report Hazen Williams C (Start) (ft) (Stop) (ft) Headloss Gradient (ft/1000ft) Length (ft) Start Stop Dia. (in) Material Flow Velocity (ft/s) P J 14 J PVC , , P J 109 J PVC , , P 150 1,733 J 62 J PVC , , P J 113 J 18 8 PVC , , P J 13 J PVC , , P J 111 J PVC , , P J 119 J PVC , , P J 116 J PVC , , P J 115 J PVC , , P J 117 J PVC , , P J 118 J PVC , , P J 46 J PVC , , P J 121 J 47 8 PVC , , P J 51 J PVC , , P J 92 J PVC , , P J 103 J PVC , , P J 42 J PVC , , P J 129 J PVC , , P J 46 J PVC , , P J 130 J 47 8 PVC , , P J 17 J PVC , , P J 48 J PVC , , P J 131 J PVC , , P J 132 J PVC , , P J 133 J PVC , , P J 134 J PVC , , P J 18 J PVC , , P J 25 J PVC , , P J 136 J PVC , , P J 136 J 25 8 PVC , , P 198 1,100 J 59 J PVC , , P 199 1,060 J 7 J PVC , , P J 139 J 60 8 PVC , , P J 99 J PVC , , P J 140 J PVC , , P J 22 J PVC , , P J 141 J 99 8 PVC , , P J 104 J 21 8 PVC , , P J 86 J PVC , , P J 143 J 80 8 PVC , , P J 102 J PVC , , P J 142 J PVC , , P 210 1,108 J 96 J PVC , , P J 144 J 81 8 PVC , ,