HomeMy WebLinkAboutFile Documents.209 E Bleeker St.0061-2020-BCHO (9)Engineering1_209 E Bleeker_0061-2020-BCHO
Page: 1
Author: pjm
File Name: Narrative.pdf
1. There is a new trench drain
proposed on sheet C5. What
does this trench drain tie to? Has
it been sized to accommodate
the tributary area?
2. Does the drainage
infrastructure have capacity to
provide treatment of the WQCV
and detention of the new
impervious area?
3. It appears that the new
impervious area drains to a
swale heading north to the
gravel bed, verify this is the
proposed drainage path.
Narrative.pdf (1)
Project Contact: Melanie Noonan
CHANGE ORDER NARRATIVE
209 E BLEEKER STREET
This change order is for the addition of 233 sf of tile patio with snowmelt to the area between the Historic cabin and the new addition (see sheet A1.3 REMP Plan, A2.3, M1.002, & C5). In order to set-off the REMP fee, we are adding more solar panels to the roof (reference sheets A2.4 & REMP worksheet).
Thank you for your time,
Melanie Noonan
Z Group Architects
1. There is a new
trench drain proposed
on sheet C5. What
does this trench drain
tie to? Has it been
sized to
accommodate the
tributary area?
2. Does the drainage
infrastructure have
capacity to provide
treatment of the
WQCV and detention
of the new impervious
area?
3. It appears that the
new impervious area
drains to a swale
heading north to the
gravel bed, verify this
is the proposed
drainage path.
Responses are as follows.
1.Yes, there is a new trench drain. As shown on Sheet C6, it
connects to the adjacent 6-inch storm pipe. The purpose of the
trench drain is to intercept low-flow snowmelt events to avoid ice
damming. Due to the minimal tributary area, all runoff from the
patio should be intercepted by the trench drain. But in the event it
is not, it will overflow into the inlet within the landscape area. This
inlet has already been sized and approved.
2.There is no new impervious area. The trench drain just
intercepts runoff before it would otherwise reach the inlet within
the landscaped area. (Note: no detention is required on this
project.)
3.Yes, this runoff heads toward the swale so it can be intercepted
by storm sewer infrastructure and routed to the gravel bed.