ie design - 689 oxford st w sanitary capacity [18 …...a9 oxford street w stub mh3 3.04 3.04 42.89...

April 30, 2019 18-2022

driveneng.ca Understand. Deliver Quality. 1

City of London MEMORANDUM

300 Dufferin Street

London, Ontario, N6A 4L9

ATTN: Mr. Marcus Schaum, Senior Technologist, Wastewater and Drainage Engineering

RE: 689 Oxford Street West

Sanitary Capacity for Proposed Development

Mr. Schaum,

As requested in the Pre-Application Consultation Meeting and noted in said meeting minutes, Driven

Engineering Inc. (Driven) has undertaken a study of the capacity of the existing sanitary sewer connection

to the subject site on Capulet Walk. The study consisted updating the original 1996 Delcan plan and the

200м Whitney Engineering plans to reflect the actual buildout of the land.

The original Delcan design accounted for approximately 10,200 population. The current plans (Phase 1)

for the developer are to construct a single 166 unit residential tower on the site of the existing

commercial. Future plans may include a second tower which replaces the commercial (Phase 2). Per your

request, Driven undertook the worst-case scenario, showing the second tower constructed, with a

discount for the removed commercial.

The Delcan and Whitney plans that Driven used for its reference are appended hereto in Appendix A.

Driven’s reproduction of the Delcan design sheet, and its own updated design sheet are included in

Appendix B. Driven’s catchment areas are shown on drawing C101, attached as well in Appendix B.

As identified by you, the controlling factor for the sanitary system on Oxford is the 350mm pipe at 0.19%

slope. Using Manning’s equation, that provides a theoretical capacity of less than 64L/s. The proposed

Phase 1, based on the updates from Driven’s study, will outlet at the Capulet-Oxford connection

approximately 92L/s. Adding the former Oxford Dodge property, which connects on Oxford upstream of

the low-slope pipe, 93L/s is calculated. Phase 2 peak flows are calculated at 93.5L/s.

I am happy to discuss the above, in person, by phone or email.

Sincerely,

Alan Johnson, P.Eng.

President, Principal Engineer

Driven Engineering Inc.

April 30, 2019 18-2022

driveneng.ca Understand. Deliver Quality.

Appendix A Original Sanitary Design Sheet and Plans

April 30, 2019 18-2022

driveneng.ca Understand. Deliver Quality.

Appendix B Calculations and Re-produced Sanitary Design Sheet

SANITARY SEWER DESIGN SHEET

UPDATING DELCAN'S 1996 SANITARY SEWER DESIGN WITH THE 2001 2002 WHITNEY DESIGNS FOR SANDCHERRY AND BLYTHWOOD

Intelligent Engineering Design

689 Oxford West Residential Tower

RESIDENTIAL POPULATION DENSITIES SANITARY SEWER DESIGN SHEET

THE FOLLOWING POPULATION ALLOWANCES WILL APPLY WHEN DESIGNING SANITARY SEWERS: DATE :

(A) HECTARE BASIS CITY OF LONDON DESIGNED BY :

LOW DENSITY (SINGLE FAMILY/SEMI-DETACHED) = 44 UNITS/HA @ 3 PEOPLE/UNIT CHECKED BY :

MEDIUM DENSITY (TOWNHOUSES) = 65 UNITS/HA @ 2.4 PEOPLE/UNIT CITY ENGINEER'S DEPARTMENT FILE No :

INSTITUTIONAL / CHURCH = 53 UNITS/HA @ 1.6 PEOPLE/UNIT SHEET :

COMMERCIAL = 60 PEOPLE/HA

INDUSTRIAL = 150 PEOPLE DESIGN CRITERIA

SEWAGE = 295 L/capita/day L/capita/second

(B) LOT BASIS INFILTRATION = 0.1 L/ha/second

SINGLE FAMILY = 3 PEOPLE PROJECT NAME : PEAKING FACTOR = HARMON FORMULA

DUPLEX / SEMI = 6 PEOPLE

AREA STREET FROM TO NET OR DELTA TOTAL PER PER No. OF DELTA TOTAL M SEWAGE INFILT. TOTAL DIA. SLOPE VELOCITY CAP. LENGTH FALL IN DROP IN

No. M.H. M.H. GROSS AREA ha AREA ha ha Unit Units POP. POP. Min.2.0 l/s l/s l/s mm % n m / s l / s M SEWER HEADLOSS MANHOLE U.S. D.S.

A1 BEAVERBROOK SA-9 SA-8 7.42 7.42 7.42 - 3 742 2226 2226 3.493 34.802 1.200 36.002 100 1.48 0.013 0.80 6.280 95.91 1.405 256.870 255.465

BEAVERBROOK SA-8 SA-1 0.00 0.00 7.42 - - - 0 2226 3.493 34.802 1.200 36.002 450 1.90 0.013 2.47 393.010 96.63 1.816 255.418 253.602

A1A BEAVERBROOK STUB SA-1 2.5 2.50 2.50 - 400 400 4.06 7.087 1.200 8.287 250 0.34 0.013 0.71 34.680 7.70 0.022 253.562 253.540

A1B CAPULET LANE STUB SA-1 7.53 7.53 7.53 - 1750 1750 3.59 27.985 1.200 29.185 300 0.61 0.013 1.07 75.530 6.57 0.033 253.605 253.572

A2 CAPULET LANE SA-1 SA-2 1.33 1.33 18.78 - 3 130 390 4766 3.14 68.531 2.197 70.728 300 0.60 0.013 1.06 74.910 77.29 0.460 0.155 253.417 252.957




A6 CAPULET LANE SA-3 SA-4 1.09 1.09 28.83 - 3 163.5 491 8215 2.86 109.974 3.373 113.347 375 0.52 0.013 1.14 126.440 89.49 0.371 0.000 251.346 250.975

A7 CAPULET LANE SA-4 SA-5A 2.02 2.02 30.85 - 3 203 609 8824 2.82 116.949 3.609 120.558 375 1.03 0.013 1.61 177.950 0.00 0.000 0.030 250.945 250.945

A8 CAPULET LANE SA-4 SA-5A 1.02 1.02 31.87 - 3 127.5 383 9207 2.80 121.277 3.729 125.006 375 1.03 0.013 1.61 177.950 95.42 0.970 0.000 250.945 249.975

A9 CAPULET LANE SA-5A SA-5A 0.95 0.95 32.82 - 3 142.5 428 9635 2.77 126.086 3.840 129.926 375 1.14 0.013 1.69 187.210 42.04 0.467 0.033 249.942 249.475

A10 CAPULET LANE SA-5A SA-6 2.1 2.10 34.92 - 3 203 609 10244 2.74 132.863 4.086 136.949 375 0.98 0.013 1.57 173.570 99.89 0.965 0.040 249.435 248.470




CAPULET LANE SA-7 EX MH 0 0.00 37.60 - 0 10792 2.71 138.898 4.399 143.297 450 0.37 0.013 1.09 173.430 99.64 0.365 0.030 247.940 247.575

A13 CAPULET LANE EX MH EX MH 1.5 1.50 39.10 - 1 134 134 10926 2.71 140.365 4.582 144.947 450 0.78 0.013 1.58 251.810 23.56 0.174 0.036 247.539 247.365

NOTES

INVERT ELEV.

0.00341

LOCATION AREA (HECTARES) POPULATION SEWAGE FLOW SEWER DESIGN PROFILE

April 2019

1. This sheet is a recreation of the 1996 Delcan deisgn sheet without modification.

2. Sewer slopes were updated to reflect the as-constructed conditions

𝑀 = 1 +14

4 + 𝑃0.6

Understand. Deliver Quality.

driveneng.ca Page 1 of 2

SANITARY SEWER DESIGN SHEET

UPDATING DELCAN'S 1996 SANITARY SEWER DESIGN WITH THE 2001 2002 WHITNEY DESIGNS FOR SANDCHERRY AND BLYTHWOOD

Intelligent Engineering Design

689 Oxford West Residential Tower

RESIDENTIAL POPULATION DENSITIES SANITARY SEWER DESIGN SHEET

THE FOLLOWING POPULATION ALLOWANCES WILL APPLY WHEN DESIGNING SANITARY SEWERS: DATE :

(A) HECTARE BASIS CITY OF LONDON DESIGNED BY :

LOW DENSITY (SINGLE FAMILY/SEMI-DETACHED) = 44 UNITS/HA @ 3 PEOPLE/UNIT CHECKED BY :

MEDIUM DENSITY (TOWNHOUSES) = 65 UNITS/HA @ 2.4 PEOPLE/UNIT CITY ENGINEER'S DEPARTMENT FILE No :

INSTITUTIONAL / CHURCH = 53 UNITS/HA @ 1.6 PEOPLE/UNIT SHEET :

COMMERCIAL = 60 PEOPLE/HA

INDUSTRIAL = 150 PEOPLE -41.84 DESIGN CRITERIA

SEWAGE = 295 L/capita/day L/capita/second

(B) LOT BASIS INFILTRATION = 0.1 L/ha/second

SINGLE FAMILY = 3 PEOPLE PROJECT NAME : PEAKING FACTOR = HARMON FORMULA

DUPLEX / SEMI = 6 PEOPLE UNCERTAINTY FACTOR =

AREA STREET FROM TO NET OR DELTA TOTAL PER PER No. OF DELTA TOTAL M SEWAGE INFILT. TOTAL DIA. SLOPE VELOCITY CAP. LENGTH FALL IN DROP IN

No. M.H. M.H. GROSS AREA ha AREA ha ha Unit Units POP. POP. Min.2.0 L/s L/s L/s mm % n m/s L/s M SEWER HEADLOSS MANHOLE U.S. D.S.

A1a BLYTHWOOD/SANDCHERRY STUB MH1 8.24 8.24 - 3 174 522 522 3.97 7.773 0.824 8.597

A1b BLYTHWOOD/BEAVERBROOK STUB MH1 5.55 5.55 1.6 - 1388 2221 2221 3.55 29.610 0.555 30.165

A1c GROCERY STUB MH1 1.28 1.28 100 - 1 128 128 4.21 2.026 0.128 2.154

A1d PARK STUB MH1 3.62 3.62 0 - 1 0 0 4.50 0.000 0.362 0.362

A1 NORTH OF BEAVERBROOK STUB MH1 0 0.00 18.69 - 3 130 390 3261 3.41 41.775 1.869 84.922

A2 CAPULET LANE STUB MH1 1.5 1.50 20.19 - 3 187.5 563 3823 3.35 48.119 2.019 50.138

A3 CAPULET LANE STUB MH1 3.47 3.47 23.66 1.6 - 520.5 833 4656 3.27 57.254 2.366 59.620

A4 CAPULET LANE STUB MH1 6.6 6.60 30.26 - 3 141 423 5079 3.24 61.788 3.026 64.814

A5 CAPULET LANE STUB MH1 3.22 3.22 33.48 1.6 - 483 773 5852 3.18 69.914 3.348 73.262

A6 PARK STUB MH1 0.98 0.98 34.46 - 0 0 0 5852 3.18 69.914 3.446 73.360

A7 CAPULET LANE STUB MH1 3.39 3.39 37.85 - 3 423.75 1271 7123 3.10 82.908 3.785 86.693 4.328

A8 CAPULET LANE STUB MH1 0.63 0.63 38.48 100 - 1 100 7223 3.09 83.9 3.848 87.757

CAPULET LANE TOWER 1 STUB MH1 0 0.00 38.48 - 1.6 166 266 7489 3.08 86.57 3.848 90.421

CAPULET LANE EX. COMM. STUB MH1 1.37 1.37 39.85 100 - -1 -100 7389 3.08 85.583 3.985 89.568

CAPULET LANE TOWER 2 STUB MH1 0 0.00 39.85 - 1.6 166 266 7654 3.07 88.23 3.985 92.213

A9 OXFORD STREET W STUB MH3 3.04 3.04 42.89 100 - 1 100 7754 3.06 89.206 4.289 93.495

CAPULET MH1 MH2 450 0.78 0.013 1.58 251.810

OXFORD STREET W MH2 MH3 350 0.44 0.013 1.01 96.760

OXFORD STREET W MH3 OUTLET 350 0.19 0.013 0.66 63.580

NOTES

SEWAGE FLOW SEWER DESIGN

A10

1. The total population is 76% of the original Delcan design. There are three reasons for this variance. 1. The proposed school was not constructed and is instead woodland/medium density. 2. The proposed medium density Blythwood is actually low density; and 3. Area A8 is now a park, versus the

proposed high density.

2. Blue highlighting denotes actual unit counts. 295L/Cap/D was used per the original designs.

3. A10 Proposed residential doesn't show infiltration as it is on the same land area as the existing A10. It would be a duplication.

4. The sewer designs were not replicated as Driven's catchment areas are based on grouping like dwelling densities and do not necessarily align with the original maintenance hole locations.

5. Area A10 commercial is shown as negative, due ot the ultimate configuration of two towers on site without the commercial. This is the best information Driven has at this time.

INVERT ELEV.

April 2019

0.00341

1.1

PROFILELOCATION AREA (HECTARES) POPULATION

𝑀 = 1 +14

4 + 𝑃0.5

Understand. Deliver Quality.

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ie design - 689 oxford st w sanitary capacity [18 …...a9 oxford street w stub mh3 3.04 3.04 42.89...

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