FINAL UTILITY REPORT

Transcription

1 RIVER VALLEY VILLAGE SUBDIVISION, AMD NO. 3 CORNERSTONE TOWNHOMES II NEC THORNTON PARKWAY & COLORADO BOULEVARD CITY OF THORNTON, STATE OF COLORADO SITUATED IN THE SOUTHWEST ¼ OF SECTION 18, TOWNSHIP 2 SOUTH, RANGE 67 WEST OF THE 6 TH PRINCIPAL MERIDIAN FINAL UTILITY REPORT ESC JN: Report Date/History: January 12, 17 Revision 1: May 02, 17 Revision 2: November 01, 17 Prepared for: ASCENT BUILDERS, INC W. 1 th Avenue Broomfield, CO Phone: (303) ATTN: Mr. Jason Brown jasonbrown@ascentbuilders.net Prepared by: Weylan A. "Woody" Bryant, PE Vice President Director of Civil Engineering East Evans Avenue Aurora, CO P , x-108 C F T/F wbryant@engineeringserviceco.com engineeringserviceco.com

2 Copyright 17 by Engineering Service Company, Inc. All rights reserved. This report or parts thereof may not be reproduced in any form, stored in a retrieval system, or transmitted in any form by any means electronic, mechanical, photocopy, recording, or otherwise without prior written permission of Engineering Service Company, Inc., except as provided by United States of America copyright law. Published by: ENGINEERING SERVICE COMPANY, INC East Evans Avenue Aurora, CO (303) phone (303) fax Toll Free (877) Printed in the United States of America FILE: n:\projects\ascent builders inc\rvv plng area a (thornton)\documents\word\reports\final utility\finalutilityreport.docx HELP SAVE PAPER! THIS DOCUMENT WAS PRINTED TWO-SIDED.

3 Cornerstone Townhomes River Valley Village Sub d, Amd #3 FINAL UTILITY REPORT January 12, 17; May 02, 17 (Rev 1); November 01, 17 (Rev 2) Page 1 DEVELOPER AND ENGINEER S CERTIFICATIONS Engineer s Certification I hereby certify that this Final Utility Report for the Final Utility Design of Cornerstone Townhomes II at River Valley Village Subdivision Amendment No. 3 was prepared by me (or under my direct supervision) in accordance with the provisions of the City of Thornton Standards and Specifications for the Design and Construction of Public and Private Improvements for the Responsible Parties thereof. I understand that the City of Thornton does not and shall not assume liability for utilities designed by others. Seal: Registered Professional Engineer State of Colorado No /01/17 Property Owner s Certificate Ascent Builders, Inc. hereby certifies that the sewer and water system for Cornerstone Townhomes II at River Valley Village Subdivision Amendment No. 3 will be constructed according to the design presented in this report. I/We understand that the City of Thornton does not and shall not assume liability for the sewer and water system designed and/or certified by my/our engineer. I/We understand that the City of Thornton reviews utility plans but cannot, on behalf of Ascent Builders, Inc., guarantee that final utility design review will absolve Ascent Builders, Inc. and/or their successors and/or assigns of future liability for improper design. I/We further understand that approval of the Plat and/or Development Permit does not imply approval of my/our engineer's utility design. Signature Name: As: Of: Date: Mr. Jason Brown President Ascent Builders, Inc. STATE OF COLORADO ) ) ss COUNTY OF ) (NOTARY SEAL) The foregoing instrument was acknowledged before me this day of,, by Jason Brown. Notary Signature My Commission Expires: Personally Known OR Produced Identification, Type of Identification Produced:

4 Cornerstone Townhomes River Valley Village Sub d, Amd #3 FINAL UTILITY REPORT January 12, 17; May 02, 17 (Rev 1); November 01, 17 (Rev 2) Page 2 1. GENERAL LOCATION AND DESCRIPTION 1.1. Location. a. The subject property is located within the northeast quadrant of the Colorado Boulevard and Thornton Parkway intersection, west of Clermont Street City of Thornton (Adams County), State of Colorado Township, range, section, one-quarter (¼) section. a. Southwest ¼ of Section 18, Township 2 South, Range 67 West of the 6 th Principal Meridian, City of Thornton, County of Adams, State of Colorado.

5 Cornerstone Townhomes River Valley Village Sub d, Amd #3 FINAL UTILITY REPORT January 12, 17; May 02, 17 (Rev 1); November 01, 17 (Rev 2) Page Streets within and adjacent to the subdivision with ROW width shown. a. Clermont Street (collector connection to Thornton Parkway for overall River Valley Village Subdivision) has a varying width public right-of-way. b. East Thornton Parkway (south) has a varying width public right-of-way (no direct access to Thornton Parkway is proposed for this project). c. Colorado Boulevard (west) has a varying width public right-of-way along the frontage of the property (no direct access to Colorado Boulevard is proposed for this project) Major facilities and easements within and adjacent to the site. a. The Colorado Agricultural Ditch, within a 75 wide easement, bifurcates the Cornerstone River Valley Village Filing No. 1 (the plat name for this project). Utility infrastructure (sanitary sewer, water, and storm sewer) will cross this major facility with the development of this phase of the project (the subject of this Final Utility Report). The sanitary sewer and watermain piping will be sleeved as it passes beneath the Colorado Agricultural Ditch for ease of maintenance Names of surrounding developments. a. West: Reserve at Thornton, Filing No. 1 (Zoned SFA, west of Colorado Boulevard) b. North: Pine Lakes Ranch (Zoned MH) c. South: Cornerstone River Valley Village (Zoned SFD) and Cherrylane Subdivision (Zoned SFD, south of Thornton Parkway) d. East: Existing River Valley Village (Zoned SFA), Public Dedication (School), North County Village (east of Riverdale Rd) 1.6. Description of Property a. Area in acres. This property was formerly known as Tract D2 within the Cornerstone River Valley Village, Amendment 2 Plat and contains acres. b. Ground cover (trees, shrubs, vegetation, general soil conditions, topography, and slope). The property is sparsely covered with native grasses. Grades are generally to the south and east at slopes between 1 and 3 percent. Colorado Boulevard is elevated from 2 to 10 feet above the site along the western boundary. Soils are generally Ulm Loams which is a hydrologic group C soil. Other soils within this northwestern quadrant of the property include Samsil Shingle Complex. This is a hydrologic group D soil Major drainage ways. a. This site lies outside of the 100-year floodplain. It appears on two FIRMs as provided by FEMA, Map Number 08001C0602H and 08001C0606H, both dated March 5, 07. b. This site falls within the Basin 4100 and Direct Flow Area 0056 Outfall System Planning Study prepared for the City of Thornton and Adams County by Kiowa Engineering, March 01. Reach lies along the alignment for Thornton Parkway General project description. a. The original overall River Valley Village (circa 02) was expected to include 480 singlefamily attached dwelling units, a future school, and a future community center. b. In 16, River Valley Village was amended to include an expected 289 single-family attached and 68 detached dwelling units, a future school, and the now existing community center. c. This Final Utility Report addresses with Utility Demand for the 160 single-family attached residential lots proposed within Planning Area A of the River Valley Village Official Development Plan.

6 Cornerstone Townhomes River Valley Village Sub d, Amd #3 FINAL UTILITY REPORT January 12, 17; May 02, 17 (Rev 1); November 01, 17 (Rev 2) Page Proposed land use. a. 160 Single-family attached residential lots, open space, regional trail, sidewalks, and private roadways. 2. BASINS AND PRESSURE ZONES 2.1. Major Basin Description a. Existing Water Infrastructure There are three existing waterlines along the south, east and west property boundaries of the overall River Valley Village development. A 24-inch main exists within Colorado Boulevard (west) and a 30-inch main exists within Thornton Parkway (south) and Riverdale Road (east). These existing mains are all within Water Pressure Zone 1. As part of the original phase of development for the existing River Valley Village, which includes single-family attached residential units and the community center, an 8-inch main loop connection between the 30-inch main within Thornton Parkway and the 30- inch main within Riverdale Road was installed. An 8-inch PRV was included on this new looped system to maintain the maximum pressures allowed within the City. A stub-out from the 8-inch loop line within Clermont Street at the roundabout intersection with 97 th Avenue was provided at the time of construction to serve development on the west side of Clermont Street. b. Proposed Water Infrastructure Water mains will be DR-25 (AWWA C ) per City of Thornton 0: Water System Standards 4.1.B (Latest Edition). Hydrant leads shall be Ductile Iron Pipe, per City of Thornton 0: Water System Standards 4.1.A (Latest Edition). An internal, looped 8-inch water system is proposed to serve this phase of the development. The connection point installed as part of the first phase of the overall River Valley Village within the existing roundabout will be utilized. 13 fire hydrants, strategically placed along the roadway alignment, are included in the infrastructure design. c. Existing Sanitary Sewer Infrastructure The South Thornton Interceptor, which is a 48-inch trunk Metro Wastewater sewer line, exists along the Lower Clear Creek Canal, which bifurcates the eastern undeveloped ( future school site portion of the overall River Valley Village development). This sewer line flows north to south and is located within an existing easement. An 8-inch sanitary sewer main, which connects to the 48-inch trunk sewer line, was constructed within Clermont Street during the first phase of development for the existing River Valley Village. A stub-out to this line was provided at the time of construction to serve development on the west side of Clermont Street at the roundabout. d. Proposed Sanitary Sewer Infrastructure Sanitary sewer piping will be SDR-35 per City of Thornton 300: Sanitary Sewer System Standards A.1 (Latest Edition). Manholes with an internal diameter of 4-feet and a flow channel fall of 0.3-feet, per City of Thornton 300: Sanitary Sewer System Standards D.1 and E (Latest Edition), respectively, will be installed at both ends of each section of sewer, at changes in grade or alignment, at intersections, and at distance not greater than 450-feet.

7 Cornerstone Townhomes River Valley Village Sub d, Amd #3 FINAL UTILITY REPORT January 12, 17; May 02, 17 (Rev 1); November 01, 17 (Rev 2) Page 5 3. DESIGN CRITERIA In general, the sanitary sewer infrastructure will gravity flow from west to east, connecting to the existing sanitary sewer within Clermont Street that was constructed as part of the first phase of development for the existing River Valley Village. The majority of the proposed infrastructure is of sufficient depth to service a house product that includes a basement without the need for private ejector systems within the home. No basements are planned for the single-family attached building product that will be offered in this development Regulations. a. The City of Thornton: Standards and Specifications were utilized. A deviation from the Standards and Specifications Detail 0-2 was approved to allow a reduction in the side yard setback for water meters from five-feet to a minimum of two-feet. A deviation from 3.13.A.1 and Standards and Specifications Detail 0-2 was approved to allow a reduction in the separation distances between water service and sanitary sewer service lines Previous Utility Studies. a. This property was the subject of a previous Utility Report prepared by Manhard Consulting (circa 02). b. As part of the Cornerstone River Valley Village rezoning effort, utility calculations were completed and provided on the Preliminary Utility Plan in lieu of the preparation of a Preliminary Utility Report Impact of Site Constraints. a. Infrastructure stub-outs for both water and sanitary sewer that were installed as part of first phase of the overall River Valley Village are in suitable locations for this proposed development and will be used. 4. SYSTEM DESIGN CRITERIA 4.1. Water: a. COT 3: Water Distribution System Design Criteria b. High HGL (no demands on system): 100 psi c. Low HGL (no demands on system): 50 psi d. Average Day Demand: 150 gpd/person e. Residential SFA: 2.45 persons/unit (mid density, 5-12 DU/Ac) f. PRV-51 (elev: ) at Clermont/Thornton Parkway (pressure: 88 psi) 1 g. Zone 1C High/Low Pressure Elevation: (HGL out of PRV = ) h. Current Plans: Highest Lot FFE: Lowest Lot FFE: i. Current Proposal: 160, single-family attached j. Original (circa 02) Proposal: 174, single-family attached units (within same area) k. Current Proposal Demand: Average Water Demand = 150 * 2.45 * 160 = 58,800 gpd (avg) = gpm (avg) Peak (3.2x day) Water Demand = 188,160 gpd = gpm Peak (5.76x hour) Water Demand = 14,110 gph = gpm 1 Utility Report, Manhard, circa 02, Base Fire Flow Analysis: Valve Report, p. 1 of 1 (PDF p. 12). 2 Cornerstone River Valley Village, Preliminary Utility Plan, October 15.

8 Cornerstone Townhomes River Valley Village Sub d, Amd #3 FINAL UTILITY REPORT January 12, 17; May 02, 17 (Rev 1); November 01, 17 (Rev 2) Page 6 Calculated Low Pressure: ( ) * 62.4 / 144 = 63.5 psi Calculated High Pressure: ( ) * 62.4 / 144 = 77.9 psi l. Original (circa 02) Proposal Demand (using design criteria described in the 02 Utility Report) 3 People/Unit: 2. GPD/Person: 150 Peaking Factor: 5.76 Average Water Demand = 150 * 2. * 174 = 57,4 gpd = gpm Peak (5.76x) Water Demand = 330,739 gpd = gpm m. Current Analysis for overall River Valley Village (reference Appendix for Water Modeling Results): Parameters: - No Demand, minimum pressure = 50 psi; maximum pressure = 100 psi - Peak Hour Demand (5.76x peak factor), minimum pressure = 40 psi; maximum velocity = 5 fps - Peak Day Demand (3.2x peak factor), minimum pressure = psi; maximum velocity = 11.2 fps (8 main); maximum velocity = 10.0 fps (12 & larger). Results: - No Demand: Maximum pressure = 97 psi (Junction J10, in Phase 1 at the intersection of E 97 th Avenue & Dexter Lane); Minimum pressure = 63 psi (Junction J17, in Phase 3/5 at the intersection of Albion Lane & E 98 th Place). BOTH RESULTS ARE WITHIN REQUIRED PARAMETERS. - Peak Hour Demand: Maximum pressure = 64 psi (Junction J18, in Phase 3/5 at the western end/hydrant of E 98 th Place); Maximum velocity = 4.24 fps (Pipe P10, in Phase 1 within E 97 th Avenue, between Dexter Lane and Dahlia Lane). BOTH RESULTS ARE WITHIN REQUIRED PARAMETERS. - Peak Day PLUS Fire Flow: Minimum pressure = 51 psi (Junction J18, in Phase 3/5 at the western end/hydrant of E 98 th Place); Maximum velocity = fps (Pipe P19, in Phase ¾ at the western end of E 98 th place, west of Albion Lane). BOTH RESULTS ARE WITHIN ACCEPTABLE TOLERANCES OF THE REQUIRED PARAMETERS. n. Conclusion: The current proposal, based on current design criteria for the entire River Valley Village Subdivision (including the existing Phase 1 and under construction Phase 2), is within acceptable tolerances of the required City parameters Sanitary Sewer: a. COT 303: Sanitary Sewer Design Criteria b. Average Day Demand: 80 gpd/person c. Residential SFD: 2.45 persons/unit (mid density, 5-12 DU/Ac) d. Current Proposal: 160, single-family attached e. Original (circa 02) Proposal: 174, single-family attached units (within same area) f. Current Proposal Outfall: Average Sanitary Sewer Flow = 80 * 2.45 * 160 = 31,360 gpd = gpm Peak (3.5x) Sanitary Sewer Flow = 109,760 gpd = gpm g. Original (circa 02) Proposal Demand (using design criteria described in the 02 Utility Report) 4 3 Utility Report, Manhard, circa 02, Water Demand, River Valley Subdivision, 10/9/01, p Utility Report, Manhard, circa 02, Sanitary Sewer Flow Calculations, p. 1-3 of 3, PDF p

9 Cornerstone Townhomes River Valley Village Sub d, Amd #3 FINAL UTILITY REPORT January 12, 17; May 02, 17 (Rev 1); November 01, 17 (Rev 2) Page 7 People/Unit: 2. GPD/Person: 100 Peaking Factor: 3.5 Average Sanitary Sewer Flow = 100 * 2. * 174 = 38,280 gpd = gpm Peak (3.5x) Sanitary Sewer Flow = 133,980 gpd = gpm h. Conclusion: 5. REFERENCES The current proposal will have less demand on the existing infrastructure than previously proposed, as such, no negative impacts are expected Standards and Specifications for the Design and Construction of Public and Private Improvements, City of Thornton, Colorado. October Utility Report for River Valley Subdivision, Manhard Consulting Ltd. February 02 (attached) Preliminary Utility Plans, VLC LLC. August Cornerstone River Valley Village: Construction Plans, ESC. April 16.

10 PHASE 3, UTILITY PLAN

11 LOT 24C LOT 25C LOT 26C LOT 27C LOT 28C LOT 29C LOT 30C LOT 31C E9 TRACT "F3" 3 11 LOT 22B LOT 1C LOT 2C LOT 3C LOT 4C LOT 5C LOT 6C LOT 7C LOT 8C LOT 9C LOT 10C LOT 11C LOT 12C LOT 13C LOT 14C LOT 15C LOT 16C LOT 17C LOT 18C LOT 19C LOT C BLOCK 10 2 TRACT "E2" LOT 1, BLOCK 19 RIVER VALLEY VILLAGE SUBDIVISION 1 28 CLERMONT STREET GENERAL NOTES: LEGEND 1. THE CONTRACTOR IS SPECIFICALLY CAUTIONED THAT THE LOCATION AND/OR ELEVATION OF EXISTING UTILITIES AS SHOWN ON THESE PLANS IS BASED ON RECORDS OF THE VARIOUS UTILITY COMPANIES, A UTILITY LOCATOR SERVICE AND, WHERE POSSIBLE, MEASUREMENTS TAKEN IN THE FIELD. THE INFORMATION IS NOT TO BE RELIED ON AS EXACT OR COMPLETE. THE CONTRACTOR MUST CALL THE LOCAL UTILITY LOCATION CENTER AT LEAST 48 HOURS BEFORE ANY EXCAVATION TO REQUEST EXACT FIELD LOCATIONS OF THE UTILITIES. IT SHALL BE THE RESPONSIBILITY OF THE CONTRACTOR TO RELOCATE ALL EXISTING UTILITIES WHICH CONFLICT WITH THE PROPOSED IMPROVEMENTS SHOWN ON THE PLANS. 2. ALL CONSTRUCTION OR CONSTRUCTION STAKING FOR THIS PROJECT SHALL BE DONE PER THE SIGNED AND APPROVED CIVIL CONSTRUCTION PLANS. ENGINEERING SERVICE COMPANY IS NOT LIABLE FOR ANY DISCREPANCIES BETWEEN ANY BID SET AND/OR BUILDING SET AND THE APPROVED CIVIL CONSTRUCTION PLANS. 3. ALL STORM SEWER IS PRIVATE AND IS DESIGNED FOR A 100-YEAR EVENT DIAMETER (MINIMUM) SLEEVES TO BE PROVIDED WHERE DRY UTILITY SERVICE LINES CROSS BENEATH A PROPOSED RETAINING WALL. BENCHMARK: ADAMS COUNTY BM #8-3 DIAMETER ALUMINUM CAP SURVEY MARK STAMPED S68W S13 SET IN THE TOP OF A 5/8 FINNED ALUMINUM ROD ENCASED IN A 6 PIE WITH A LOGO CAP AT THE NORTHWEST CORNER OF COLORADO BOULEVARD AND EAST 100TH AVENUE. 146' NORTH OF THE CENTERLINE OF 100TH AVENUE AND 134' WEST OF THE CENTERLINE OF COLORADO BOULEVARD. ELEVATION = FEET (NAVD 1988 DATUM) Scale: 1" = 50' EXIST. ELECTRICAL LINE EXIST. FIBER-OPTIC LINE EXIST. GAS LINE EXIST. SANITARY SEWER LINE EXIST. STORM SEWER LINE EXIST. TELEPHONE LINE EXIST. WATER LINE PROP. STORM SEWER LINE PROP. SANITARY SEWER LINE PROP. WATER LINE EXIST. FIRE HYDRANT EXIST. LIGHT POLE EXIST. MANHOLE EXIST. STREET LIGHT EXIST. TELEPHONE PEDESTAL EXIST. WATER METER EXIST. WATER VALVE PROP. FIRE HYDRANT PROP. MANHOLE PROP. STREET LIGHT PROP. WATER METER PROP. WATER VALVE WAB, DRA, JDP E Drawn by: Date: JDP Checked by: WAB, DRA Sheet No.: Prepared For: OVERALL UTILITY PLAN CORNERSTONE TOWNHOMES II - CIVIL CDS RIVER VALLEY VILLAGE SUBDIVISION - AMENDMENT NO. 3 SITUATED IN THE SW 1/4 OF SECTION 18, T.2S., R.67W. OF THE 6TH P.M. CITY OF THORNTON, COUNTY OF ADAMS, STATE OF COLORADO ASCENT BUILDERS, INC WEST 1TH AVENUE BROOMFIELD. COLORADO PHONE: (303) Horz.: 1"=50' Vert.: N.A. ATTN: JASON BROWN Know what'sbelow. Call before you dig. COLORADO W CALL Or The One-call Center Of Colorado EYLA N PROF E S S I ONA L ENGINEERING SERVICE COMPANY Prepared Under The Direct Supervision Of: REGISTERED A. Weylan A. Bryant, P.E. No For and on behalf of Engineering Service Company, Inc. Designed by: Engineering No.: B RY A I NE ER ENG C I V I L E N G I N E E R S L A N D S U R V E Y O R S East Evans Avenue Aurora, Colorado engineeringserviceco.com No.: Description: Date: 1 INITIAL CONSTRUCTION PLAN REVIEW SUBMITTAL 01/24/17 2 SECOND CONSTRUCTION PLAN REVIEW SUBMITTAL 05/04/17 3 THIRD CONSTRUCTION PLAN REVIEW SUBMITTAL 08/15/17 4 FOURTH CONSTRUCTION PLAN REVIEW SUBMITTAL 11/01/17 11/01/17 Scale: C4.1 Creative Solutions Since 1954 P F T/F CALL 2 BUSINESS DAYS IN ADVANCE BEFORE YOU DIG, GRADE, OR EXCAVATE FOR THE MARKING OF UNDERGROUND MEMBER UTILITIES UNPLATTED E2 BLOCK 1 LOT 1C LOT 2C LOT 3C LOT 4C LOT 5C LOT 6C LOT 7C LOT 8C LOT 9C LOT 10C LOT 11C LOT 12C LOT 13C LOT 14C LOT 15C LOT 16C LOT 17C LOT 18C LOT 19C LOT C LOT 21C LOT 22C LOT 23C COLORADO BOULEVARD E3 TRACT "A3" BLOCK 2 LOT 1C LOT 2C LOT 3C LOT 4C LOT 5C LOT 6C LOT 7C LOT 8C LOT 9C LOT 10C LOT 11C LOT 12C TRACT "B3" BLOCK 3 LOT 1C LOT 2C LOT 3C LOT 4C LOT 5C LOT 6C LOT 7C LOT 8C E8 ALBION LANE TRACT "J3" LOT 22C LOT 1C LOT 21C LOT C LOT 19C TRACT "D3" LOT 2C LOT 3C LOT 4C LOT 18C LOT 5C LOT 17C LOT 16C LOT 15C LOT 14C LOT 13C LOT 12C E7 LOT 1C LOT 2C LOT 3C LOT 4C LOT 5C LOT 6C LOT 7C E8 BLOCK 6 BLOCK 5 LOT 6C LOT 7C LOT 8C LOT 9C LOT 10C LOT 11C 9 E9 22 TRACT "E3" E8 ASH LANE TRACT "J3" EAST 98TH PLACE TRACT "J3" LOT 1C 50 LOT 2C LOT 3C LOT 9C LOT 10C LOT 11C LOT 12C LOT 13C LOT 14C LOT 15C BLOCK TRACT "K3" LOT 4C LOT 5C TRACT "F3" 24 LOT 6C 6 E6 LOT 7C LOT 8C E7 E TRACT "F3" E BLOCK 8 58 LOT 14C LOT 15C LOT 16C LOT 17C LOT 18C LOT 19C LOT C LOT 21C EAST 97TH AVENUE TRACT "J3" LOT 11C LOT 12C LOT 13C BLOCK 11, RIVER VALLEY VILLAGE SUBDIVISION - AMENDMENT NO. 3 LOT 6C LOT 7C LOT 8C LOT 9C LOT 10C BIRCH LANE TRACT "J3" LOT 16C LOT 15C LOT 14C LOT 13C LOT 12C LOT 11C TRACT "G3" BLOCK 9 BLOCK 8 LOT 1C LOT 2C LOT 3C LOT 4C LOT 5C LOT 1C LOT 2C LOT 3C LOT 4C LOT 5C LOT 6C LOT 7C LOT 8C LOT 9C LOT 10C LOT 12C LOT 13C LOT 14C LOT 15C LOT 16C LOT 17C LOT 18C LOT 19C LOT C LOT 21C 39 E E E CLERMONT LANE TRACT "J3" E8 LOT 9C LOT 8C 41 LOT 9C EAST 96TH WAY LOT 1C LOT 2C LOT 3C LOT 4C BLOCK TRACT EASEMENT SCHEDULE: E1 INTENTIONALLY DELETED E2 EXIST. QWEST EASEMENT, (REC. NO. C ) E3 EXIST. SLOPE EASEMENT, (BK.5464~PG.247) UTILITY PLAN SCHEDULE: 1 PROP. STORM MH # PROP. 10 TYPE R INLET #2.5 2 PROP. STORM MH # PROP. 10 TYPE R INLET #2.6 3 PROP. STORM MH #1.3 PROP. UNDERDRAIN LINE 35 PROP. SAN MH # PROP. SAN MH # PROP. SAN MH #4.3 LOT 5C 19 4 PROP. STORM MH #1.4 5 PROP. STORM MH # PROP. SAN MH # PROP. SAN MH # PROP. SAN MH # PROP. SAN MH #5.2 BLOCK 2, RIVER VALLEY VILLAGE SUBDIVISION - AMENDMENT NO PROP. FIRE HYDRANT # PROP. FIRE HYDRANT # PROP. FIRE HYDRANT #6.5.1 E4 EXIST. 75 DITCH EASEMENT, (REC. NO ) PROP. UTILITY EASEMENT 55 PROP. FIRE HYDRANT # PROP. FIRE HYDRANT #7.3.1 E6 PROP. ' EXCLUSIVE WATER EASEMENT 6 PROP. STORM MH # PROP. SAN MH # PROP. SAN MH # PROP. STORM MH #2.2 E7 PROP. 30' EXCLUSIVE WATER & SANITARY SEWER EASEMENT 7 PROP. STORM MH # PROP. SAN MH # PROP. SAN MH # PROP. STORM MH #2.1.1 E8 PROP. 40' EXCLUSIVE WATER & SANITARY SEWER EASEMENT 8 PROP. 5 TYPE R INLET # PROP. SAN MH # PROP. SAN MH # PROP. STORM MH #1.1.1 TRACT "C3" E9 PROP. EXCLUSIVE WATER EASEMENT 9 PROP. 10 TYPE R INLET # PROP. SAN MH # PROP. FIRE HYDRANT #1.4.1 N T 10 PROP. 5 TYPE R INLET # PROP. SAN MH # PROP. FIRE HYDRANT # PROP. 10 TYPE R INLET # PROP. SAN MH # PROP. FIRE HYDRANT # PROP. 5 TYPE R INLET # PROP. SAN MH # PROP. FIRE HYDRANT # PROP. 5 TYPE R INLET # PROP. SAN MH # PROP. FIRE HYDRANT # PROP. 5 TYPE R INLET # PROP. SAN MH # PROP. FIRE HYDRANT #3.1.1 TRACT "B2", RIVER VALLEY VILLAGE SUBDIVISION - AMENDMENT NO PROP. 5 TYPE R INLET # PROP. 5 TYPE R INLET # PROP. SAN MH # PROP. SAN MH # PROP. FIRE HYDRANT # PROP. FIRE HYDRANT # PROP. 5 TYPE R INLET # PROP. SAN MH # PROP. FIRE HYDRANT #5.1.1

12 CURRENT WATER MODEL

13 WATER DEMAND CORNERSTONE TOWNHOMES II 10/26/17 Residential Demand: Average Day = number of units x number of persons per unit x 150 gpd per person X 1 day / 1440 minutes Max Day Average day x 3.2 Max Hour = Average day x 5.76 Single family Attached (SFA) = Medium density, 2.45 persons per unit Single family Detached (SFD) = Low density, 3.45 persons per unit JUNCTION ESTIMATED NUMBER OF UNITS SERVED AVERAGE DAILY DEMAND (gpm) MAX DAILY DEMAND (gpm) PEAK HOUR DEMAND (gpm) SFA SFD J J J3 J4 J J J7 J8 J J10 J11 J J J J J J J J19 J J J J J J J Commercial Demand: Average Day = 800 gpd per 1,000 square foot of Building x Building Square Footage x 1 day / 1440 minutes Max Day Average day x 1.8 Max Hour = Average day x 3.24 JUNCTION ESTIMATED SQUARE FOOTAGE SERVED AVERAGE DAILY DEMAND (gpm) MAX DAILY DEMAND (gpm) PEAK HOUR DEMAND (gpm) J J TOTAL WATER DEMAND Water distribution minimum design criteria No Demand Scenario Allowable System Passed Maximum Pressure 100 psi 97 J10 Yes Minimum Pressure 50 psi 63 J17 Yes Max Hour Scenario Minimum Pressure 40 psi 64 J18 Yes Maximum Velocity 5 fps 4.24 fps in P10 Yes Max day + Fire Flow Scenario Minimum Pressure psi 51 J18 Yes Maximum Velocity 10 fps, 11.2 fps (8") fps in P19 Yes

14 P-34 P-26 P-22 P-19 P-18 P-17 P-16 P-31 P-3 P-2 P-1 P-30 Scenario: BASE MODEL CLUB HOUSE 130 SFA 160 SFA FUTURE SCHOOL SITE 68 SFD P-27 P-28 P-6 P-5 P-4 P-7 P-11 P-10 P-9 J-11 J-10 J-22 J-21 J-24 J-19 J-17 J-1 J-26 J-2 J-16 J-3 P-8 P-15 P-14 J-13 J-14 J-15 J-12 PRV-1 J-8 J-9 J-4 J-5 J-6 J-7 J-23 J- J-25 PRV-2 R-1 Bentley Systems, Inc. Haestad Methods Solution Center 27 Siemon Company Drive Suite 0 W Watertown, CT USA Bentley WaterCAD CONNECT Edition [ ] Page 1 of 1 CORNERSTONE-TOWNHOMES II.wtg 10/30/17

15 STATIC FlexTable: Junction Table J-1 J-2 J-3 J-4 J-5 J-6 J-7 J-8 J-9 J-10 J-11 J-12 J-13 J-14 J-15 J-16 J-17 J-19 J- J-21 J-22 J-23 J-24 J-25 J-26 Label Elevation (ft) 5, , , , , ,1.60 5, , , , ,09 5, , , , , , , , , , , , , ,1.88 5, Zone Demand (gpm) Hydraulic Grade (ft) Pressure (psi) CORNERSTONE-TOWNHOMES II.wtg 10/30/17 Bentley Systems, Inc. Haestad Methods Solution Center 27 Siemon Company Drive Suite 0 W Watertown, CT USA Bentley WaterCAD CONNECT Edition [ ] Page 1 of 1

16 J-1 J-2 J-3 J-4 J-5 J-6 J-7 J-8 J-9 J-10 J-11 J-12 J-13 J-14 J-15 J-16 J-17 J-19 J- J-21 J-22 J-23 J-24 J-25 J-26 Label Elevation (ft) 5, , , , , ,1.60 5, , , , ,09 5, , , , , , , , , , , , , ,1.88 5, FlexTable: Junction Table Zone MAX HOUR Demand (gpm) Hydraulic Grade (ft) 5, , , , , , , , , , ,3.97 5, , , , , , , , , , , , , , Pressure (psi) CORNERSTONE-TOWNHOMES II.wtg 10/30/17 Bentley Systems, Inc. Haestad Methods Solution Center 27 Siemon Company Drive Suite 0 W Watertown, CT USA Bentley WaterCAD CONNECT Edition [ ] Page 1 of 1

17 FlexTable: Pipe Table Headloss Gradient (ft/ft) Velocity (ft/s) Flow (gpm) Minor Loss Coefficient (Local) Hazen-Williams C Material Diameter (in) Length (Scaled) (ft) Label P P P P P P P P P P P P P P P P P P P P P P P P P P P P P P P P P ,060 P-34 Page 1 of 1 27 Siemon Company Drive Suite 0 W Watertown, CT USA /30/17 Bentley WaterCAD CONNECT Edition [ ] Bentley Systems, Inc. Haestad Methods Solution Center CORNERSTONE-TOWNHOMES II.wtg MAX HOUR

18 Fire Flow Node FlexTable: Fire Flow Report Satisfies Fire Flow Constraints? Fire Flow (Needed) (gpm) Flow (Total Needed) (gpm) Pressure (Calculated Residual) (psi) Pressure (Zone Lower Limit) (psi) Pressure (Calculated Zone Lower Limit) (psi) Pressure (Calculated System Lower Limit) (psi) Junction w/ Minimum Pressure (System) 1,50 1, ,50 1, ,50 1, ,50 1, ,50 1, ,50 1, ,50 1, ,50 1, ,50 1, ,50 1, ,50 1, ,50 1, ,50 1, ,50 1, ,50 1, ,50 1, ,50 1, J-17 1,50 1, ,50 1, ,50 1, ,50 1, ,50 1, ,50 1, ,50 1, ,50 1, ,50 1, Bentley Systems, Inc. Haestad Methods Solution Center 27 Siemon Company Drive Suite 0 W Watertown, CT USA Bentley WaterCAD CONNECT Edition [ ] Page 1 of 1 J-1 J-2 J-3 J-4 J-5 J-6 J-7 J-8 J-9 J-11 J-12 J-13 J-14 J-15 J-16 J-17 J-19 J- J-21 J-22 J-23 J-24 J-25 J-26 J-10 Label Zone CORNERSTONE-TOWNHOMES II.wtg 10/30/17

19 HISTORICAL REPORTS

20

21 THESE ITEMS FROM THE ORIGINAL REPORT ARE NOT INCLUDED

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