Response to Info_Request_stg6 REC14 0009 2-10-14 Callaghan Toth

6. Provide a preliminary engineering design for the necessary road works. The design
must be prepared by an RPEQ and extend from the existing formation in Cordwood
Drive the the full length of ‘Masonry Street’. The design must include:

Levels (natural surface and finished design)
Cross Sections and Longitudinal Section
All banks and batters

Stormwater

Existing services

Temporary Turnaround (if required)

~D9AOTD

Response:

Please refer to enclosed layout plans 1225-61a, 1225-62a, Longitudinal Section 1225-65a,
Cross sections 1225-66 to 1225-72 inclusive (revision a).

On enclosed plan 1225-80a we show existing water main, communications, and
underground electrical that is on the western side of Masonry Street. These services
currently terminate at the southern boundary of Lot 12 SP248255. There are also existing
sewer and water mains traversing the property in easements, see 1225-60a.

It is planned to complete stages 5 and 6 in one Construction Contract therefore a temporary
turnaround is not required.

7. Provide comment on the potential affects on the flood plain created by the proposed
roadworks. Please note that the Q100 line indicated on the plans is part of the
adjoining application and has not been accepted by Council at this time.

Response:

The proposed roadworks are nearly all above the Q100 flood line therefore flood plan effect
is considered negligible. A small part of proposed cul-de-sac fill batter is in the flood plain
however this has been accounted for in the Flood Study by BSM. Please refer to enclosed
plan 1225-61a and 1225-62a which shows developed Q100 extents.

Filling to lots 13-16 adjacent to floodplain has been completed using retaining walls to avoid
negative impacts from subdivision construction works. Refer to 1225-61a and 1225-62a for
details of retaining walls and flood line.

8. Provide a preliminary engineering design for the necessary stormwater drainage
works. The design must be prepared by an RPEQ and include:
a. Stormwater drainage from the roadworks and the proposed lots.
b. Stormwater drainage to service the adjoining Lot 1 RP173883 and any
structures necessary to address runoff from the adjoining properties.
c. Stormwater detention and treatment devices for the relevant stage.

Response:

a. Please refer to enclosed Plan 1225-61a and 1225-62a which show the stormwater
layout. There is interlot drainage to lots 13-16 which do not slope towards the road.

b. Lot 1 RP173883 has been provided with a stormwater and sewer connection. There
is not considered to be a need for structures to address stormwater runoff from
adjacent properties as lots on Cordwood Drive have interlot stormwater pits.

c. Stormwater detention is referred to in BSM report dated 15-9-14 in item 1 page 5.
The bridge and bund detention referred to in the BSM report is shown on attached

X:MOBSICT Projects in progress\1225 30 lots lake MacDonald Drive\Correspondence\Stage 5\REC info req response\Response to C Info_Request_stg5 REC 14 0009
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