HomeMy WebLinkAboutFile Documents.124 W Hallam St.0025.2017 (3).ARBKMarkup Summary
Page: 1
Author: jackd
File Name: B. V-001.00 SITE SURVEY.pdf
Surveyor's certificate must state
that the error of closure is less
than 1/15,000.
B. V-001.00 SITE SURVEY.pdf (4)
Page: 1
Author: jackd
File Name: B. V-001.00 SITE SURVEY.pdf
Survey must be performed or
verified within the last 12
months.
Page: 1
Author: jackd
File Name: B. V-001.00 SITE SURVEY.pdf
Survey must be signed and
stamped.
Page: 1
Author: jackd
File Name: B. V-001.00 SITE SURVEY.pdf
Include the Vicinity in the Vicinity
map.
Page: 10
Author: jackd
File Name: DRAINAGE REPORT.2017.03.08.pdf
Include some discussion of
drywell PVC Liner.
DRAINAGE REPORT.2017.03.08.pdf (3)
Surveyor's certificate
must state that the
error of closure is
less than 1/15,000.
Survey must be
performed or verifiedwithin the last 12
months.
Survey must be
signed and stamped.
Include the Vicinity in
the Vicinity map.
6.0 Proposed Facilities
6.1 Proposed Structures
A single drywell is being utilized to meet t
will be collected via roof drains that will th
these downspouts will be inlets to capture
wide trench drain piped to an oil/sand sepa
collected by slot drains. Everything will be
contained in section 5.0 of this report. The
4.2. The drywell structure has a diameter o
depth of 14.5 feet. The soil on the site was
20 mpi as stated in the Geotechnical Repor
drywell were performed using this percola
Inlet ID Basin ID Total Area Imp. Area Impervious C Value
See(D1) (ft
2)(ft2)(%)From Tabl
Downspout Inlet 1 2 1220.89 1220.89 100.00% 0.950
Downspout Inlet 2 4 520.00 520.00 100.00% 0.950 Drywell Grated Lid 5 447.00 447.00 100.00% 0.950
Downspout Inlet 3 and 4 8 307.00 307.00 100.00% 0.950
Downspout Inlet 5 9 267.00 267.00 100.00% 0.950
Drywell Basins Diameter Storage
Include some
discussion of drywell
PVC Liner.
Surveyor
Surveyor
Surveyor
Surveyor
Section 6.1 of the report has been
updated with some description of the
PVC line to be used.
City of Aspen
Received
06/23/17
Building Department
Page: 10
Author: jackd
File Name: DRAINAGE REPORT.2017.03.08.pdf
Show drain time calculations and
summary for the drywell.
Page: 11
Author: jackd
File Name: DRAINAGE REPORT.2017.03.08.pdf
Include Sand Oil separator and
Green Roof in Operations and
Maintenance section.
Page: 3
Author: jackd
File Name: E. CIVIL DRAWINGS.2017.03.08.pdf
Provide Excavation Stabilization
plans.
E. CIVIL DRAWINGS.2017.03.08.pdf (8)
Page: 4
Author: jackd
File Name: E. CIVIL DRAWINGS.2017.03.08.pdf
Will the carriage shed and
concrete pad be remaining in
this area?
Page: 5
Author: jackd
File Name: E. CIVIL DRAWINGS.2017.03.08.pdf
Make a note how SB5 will be
connected to the drywell.
Other snowmelted patios and impervious surface will be
to the drywell. Analysis of the conveyance structures is
l was sized for the total detention calculated in section
, a perforation depth of 8 feet, and an effective sump
ined to have a percolation rate of 3 inches per hour or
ulations for determining the perforated area with the
e.
Internal Volume Total Capacity Required Capacity
π*H*(D/2)2) (ft3)(ft3)(ft3)
410 410 408.9
Show drain time
calculations and
summary for the
drywell.
7.0 Operation and Maintenance
7.1 Drywell
Drywells must be inspected and maintained quarterly to remove sediment and debris that has washed into them. A maintenance plan shall be submitted to the City in the Drainage Report describing the
maintenance schedule that will be undertaken by the owners of the new residence or building. Minimum inspection and maintenance requirements include the following: Inspect drywells at least four times a year and after every storm exceeding 0.5 inches. Dispose of sediment, debris/trash, and any other waste material removed from a drywell at suitable disposal sites and in compliance with local, state, and federal waste regulations. Routinely evaluate the drain-down time of the drywell to ensure the maximum time of 24 hours is not being exceeded. If drain-down times are exceeding the maximum, drain the drywell via
pumping and clean out the percolation area (the percolation barrel may be jetted to remove sediment accumulated in perforations. If slow drainage persists, the system may need to be replaced.
Inspect the 6 inch perforated pipe to ensure the surrounding filter fabric has not become clogged.
8.0 Appendices
Drywell
Needed Perforation Area
Infitration Rate 3 in/hr.
Hydraulic Cond. (K) 0.0001 ft/sec
Required Detention 410.00 ft3
Required Perforation Area (AP)136.67 ft2
Drywell Diameter 6.0ft
Perforation Depth 8.0 ft
Proposed Perforation Area (AP) 150.80 ft2
Include Sand Oil
separator and Green
Roof in Operations
and Maintenance
section.
Provide Excavation
Stabilization plans.
TV
Alley B
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5
6
21.07' PUBLI
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.
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.
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.
(GRAVEL SU
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)
Will the carriage shedand concrete pad beremaining in thisarea?
Make a note how SB5
will be connected to
the drywell.
Section 6.1 of the report now includes a
drain time calculation for the drywell.
Section 7.0 Operations and Maintenance of the report
has been updated with infomation on the green roof
and snd/oil interceptor. Additional information has
also been added to the appendix.
An excavation stabilization plan
has been provided with the
comment response package.
These structures are off of the
124 W. Hallam property and will
remain.
The rim of the drywell has been
lowered so flow discharging from
the front porch downspout will
drain to the low point where the
grated drywell lid will collect the
surface drainage.
City of Aspen
Received
06/23/17
Building Department
Page: 8
Author: jackd
File Name: E. CIVIL DRAWINGS.2017.03.08.pdf
Show the distance from building
foundation to drywell.
Page: 10
Author: jackd
File Name: E. CIVIL DRAWINGS.2017.03.08.pdf
Label PVC Liner separation from
drywell.
Page: 10
Author: jackd
File Name: E. CIVIL DRAWINGS.2017.03.08.pdf
Submit variance request for
drywells proximity to the property
line and foundation.
Page: 11
Author: jackd
File Name: E. CIVIL DRAWINGS.2017.03.08.pdf
Drain entire west walkway to the
trench drain. Do not have a
section of the walkway draining
across the property line as
shown.
Page: 14
Author: jackd
File Name: E. CIVIL DRAWINGS.2017.03.08.pdf
Make sure the entire PVC liner
complies with this drywell detail.
Show the distancefrom buildingfoundation to drywell.
Label PVC Liner
separation from
drywell.
Submit variancerequest for drywellsproximity to theproperty line andfoundation.
Drain entire west
walkway to the trench
drain. Do not have a
section of the
walkway draining
across the property
line as shown.
Make sure the entire
PVC liner complies
with this drywell
detail.
A dimension has been added
here.
A dimension has been added
here.
A variance request has been
included in the comment
response package.
A variance request has been
included in the comment
response package.
On the drywell cross-section the separation
from the drywell to the PVC liner has been
dimensioned (1.5'). This dimension matches
the 1.5' in the drywell detail.
City of Aspen
Received
06/23/17
Building Department