RE Salmon Run Apartments - Updates QuestionsIPM.Note
RE: Salmon Run Apartments - Updates / Questions
RE:
Karen Bennett
Heimbigner, Chad
Karen Bennett
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Heimbigner@coffman.com
Salmon Run Apartments - Updates / Questions
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Subject: RE: Salmon Run Apartments - Updates / Questions
Date: Wed, 4 May 2011 09:25:32 -0700
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From: "Heimbigner, Chad" <Heimbigner@coffman.com>
To: "Amy Head" <amy@sheacarrjewell.com>,
"Tami Merriman" <tamim@ci.yelm.wa.us>
Cc: <karenb@ci.yelm.wa.us>,
"Rod Butler" <butler@zeckbutler.com>,
<timberriverdev@hotmail.com>,
"Mark King" <king@zeckbutler.com>,
"Chuck Lie" <CLie@terra-associates.com>,
"Arnold, Tom" <arnold@coffman.com>,
"Matlack, Rebecca" <matlack@coffman.com>,
<cschepper@terra-associates.com>
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Subject: RE: Salmon Run - Swale / Infiltration Gallery Cross Section
Date: Mon, 1 Nov 2010 10:17:22 -0700
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From: "Tami Merriman" <tamim@ci.yelm.wa.us>
To: "Heimbigner, Chad" <Heimbigner@coffman.com>
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Heimbigner, Chad
SMTP
Heimbigner@coffman.com
Karen Bennett; Rod Butler; timberriverdev@hotmail.com; Mark King; Chuck Lie; Arnold, Tom; Matlack, Rebecca; cschepper@terra-associates.com
Amy Head; Tami Merriman
Salmon Run Apartments - Updates / Questions
Thank you for your input Amy.
Tami – Can you please clarify the setback requirement for the City?
Based on the attached email, our understanding is that the 10 foot
setback applies to structures as well as property lines based on the
statement, “the 10 foot setback that we require includes structures”.
This input was critical to our layout of all of the site and building
improvements.
I look forward to receiving your input regarding the setback and if you
have any additional comments regarding our updates / questions noted
below. Thank you.
Chad
Chad Heimbigner, P.E., LEED AP
Senior Civil Engineer
Coffman Engineers, Inc.
p 509.328.2994 | f 509.328.2999 www.coffman.com
<http://www.coffman.com/>
LASTING creativity | results | relationships
Please consider the environment before printing this email.
________________________________
From: Amy Head [mailto:amy@sheacarrjewell.com]
Sent: Wednesday, May 04, 2011 9:16 AM
To: Heimbigner, Chad; Tami Merriman
Cc: karenb@ci.yelm.wa.us; Rod Butler; timberriverdev@hotmail.com; Mark
King; Chuck Lie; Arnold, Tom; Matlack, Rebecca;
cschepper@terra-associates.com
Subject: RE: Salmon Run Apartments - Updates / Questions
Contech StormFilters are allowable for treatment.
As far as the setback, I believe the 10 foot setback the City discussed
is from the property line. The infiltration setback is a different
thing and is out of the DOE manual. This is a setback from buildings
not property lines. The setback is to prevent and undermining of
building foundations due to stormwater infiltration in the immediate
vicinity.
Amy Head, PE, LEED AP
Associate Principal
From: Heimbigner, Chad [mailto:Heimbigner@coffman.com]
Sent: Wednesday, May 04, 2011 9:08 AM
To: amy@sheacarrjewell.com; Tami Merriman
Cc: karenb@ci.yelm.wa.us; Rod Butler; timberriverdev@hotmail.com; Mark
King; Chuck Lie; Arnold, Tom; Matlack, Rebecca;
cschepper@terra-associates.com
Subject: Salmon Run Apartments - Updates / Questions
Good morning Amy and Tami.
I have some updates and questions regarding the Salmon Run Apartment
project (10720 Vancil Road Southeast). Can one of you please provide me
with some input?
* In response to your initial comments, we requested the
geotechnical engineer conduct some additional testing at the subject
site. During the supplemental geotechnical explorations, groundwater
was encountered at an elevation of approximately 341.50. Test pits that
were excavated to an elevation of approximately 339.00 a year ago didn’t
have any seepage. According to the geotechnical engineer, last year at
the time of test pit excavation, the rainfall for the water year to date
was about 2.5 inches more than normal. This year during the recent
explorations, the rainfall to date is about 6 inches more than normal
for the water year. We anticipate this is contributing to the elevated
groundwater level. It appears the most feasible option for utilizing
infiltration facilities for the subject site is utilizing StormFilter
units (see attached) for treating storm water runoff, with discharge to
shallow, subsurface infiltration galleries. We would not utilize swales
for treating storm water. The galleries would be similar to those
previously proposed, with the exception of using more piping (to allow
for more temporary, subsurface storage volume), having a shallower drain
rock depth (3 foot depth for drain rock, rather than 5 feet as
previously proposed), and a shallower excavation (bottom of gallery
would be installed at elevation 344.50 or higher, allowing for 3 feet of
separation from the recently encountered groundwater). We would still
have the infiltration galleries located in the areas previously shown,
with some of the galleries also expanding into the limits of the parking
area more. The geotechnical engineer is currently conducting an
analysis to determine if the revised storm water management system we
are proposing meets the Site Suitability Criteria for the subject site?
If the geotechnical engineer determines the proposed improvements meet
the Site Suitability Criteria, will the City allow a separation of 3
feet as noted in SSC-5? Is the use of StormFilter units acceptable for
treatment of storm water prior to disposal to shallow infiltration
galleries?
* We have a question regarding the following comment from the
letter dated February 25, 2011: Site suitability Criteria 1 (SSC-1
Setback Criteria) – the infiltration facilities shall be set back at
least 20 feet downslope of a building foundation and 100 feet upslope.
Most of the proposed infiltration systems do not meet this requirement.
We understand the setback criteria are provided as guidance. Based on
an email from Tami Merriman (City of Yelm) dated November 1, 2010, we
understand the City has allowed the 20 foot setback to be reduced to 10
feet. Please let us know if our understanding is correct and 10 feet is
acceptable.
I look forward to receiving your input. Please let me know if you have
any comments or questions. Thank you. I appreciate your help.
Chad
Chad Heimbigner, P.E., LEED AP
Senior Civil Engineer
Coffman Engineers, Inc.
p 509.328.2994 | f 509.328.2999 www.coffman.com
<http://www.coffman.com/>
LASTING creativity | results | relationships
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RE%3A Salmon Run Apartments - Updates ? Questions-2.EML
Karen Bennett
urn:content-classes:message
Amy Head
SMTP
amy@sheacarrjewell.com
Amy Head
Amy Head
Tami Merriman
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tami
Tami Merriman
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tamim@ci.yelm.wa.us
Karen Bennett
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KarenB
karenb@ci.yelm.wa.us
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karenb@ci.yelm.wa.us
Rod Butler
SMTP
butler@zeckbutler.com
Rod Butler
Rod Butler
timberriverdev@hotmail.com
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timberriverdev@hotmail.com
timberriverdev@hotmail.com
timberriverdev@hotmail.com
Mark King
SMTP
king@zeckbutler.com
Mark King
Mark King
Chuck Lie
SMTP
CLie@terra-associates.com
Chuck Lie
Chuck Lie
Arnold, Tom
SMTP
arnold@coffman.com
Arnold, Tom
Arnold, Tom
Matlack, Rebecca
SMTP
matlack@coffman.com
Matlack, Rebecca
Matlack, Rebecca
cschepper@terra-associates.com
SMTP
cschepper@terra-associates.com
cschepper@terra-associates.com
cschepper@terra-associates.com
RE: Salmon Run - Swale / Infiltration Gallery Cross Section
IPM.Note
RE: Salmon Run - Swale / Infiltration Gallery Cross Section
RE:
Tami Merriman
EX
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Salmon Run - Swale / Infiltration Gallery Cross Section
Tami Merriman
EX
/O=CITYOFYELM/OU=FIRST ADMINISTRATIVE GROUP/CN=RECIPIENTS/CN=TAMI
Heimbigner, Chad
Salmon Run - Swale / Infiltration Gallery Cross Section
Good Morning Chad
Thanks for your patience. I was out last week, husband had surgery.
Anyway, the 10 foot setback that we require includes structures.
The manual states:
Site constraints are any manmade restriction such as property lines, easements, structure, etc. that impose constraints on development. Constraints may also be imposed from natural
features such as requirements of the local governments sensitive areas ordinance and rules. They should also be reviewed for specific application to the proposed development.
All facilities shall be a minimum of 20 feet from any structure, property line, and any vegetative buffer required by the local government and 100 feet away from any septic tank/drainfield.
As I stated previously, the City has allowed the 20 foot setback be reduced to 10 feet.
Tami Merriman
Associate Planner
City of Yelm
<mailto:tamim@ci.yelm.wa.us> tamim@ci.yelm.wa.us
360.458.8496
From: Heimbigner, Chad [mailto:Heimbigner@coffman.com]
Sent: Friday, October 29, 2010 9:33 AM
To: Tami Merriman
Cc: Rod Butler; Arnold, Tom; Mark Rozgay
Subject: RE: Salmon Run - Swale / Infiltration Gallery Cross Section
Good morning Tami.
I hope your Friday is off to a good start. Do you have an approximate timeline of when you’ll be able to provide a response to my email below? Also, please let me know if there is
someone else that would be more appropriate for me to contact regarding the questions I noted. Thank you. I appreciate your help.
Chad
Chad Heimbigner, P.E., LEED® AP
Senior Civil Engineer
Coffman Engineers, Inc.
p 509.328.2994 | f 509.328.2999
LASTING creativity | results | relationships
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_____
From: Heimbigner, Chad
Sent: Wednesday, October 27, 2010 4:34 PM
To: 'Tami Merriman'
Cc: 'Rod Butler'; Arnold, Tom
Subject: Salmon Run - Swale / Infiltration Gallery Cross Section
Good afternoon Tami.
Attached for your review is a proposed cross-section of the swale / infiltration gallery in relation to the building associated with the Salmon Run development. Based on the previous
correspondence we received from you, we understand the storm water management improvements have a 10’ setback from the property line. Is there a setback requirement between the swale
and the building? For certain areas of the site / building, we would like to extend the building foundation wall as shown and run the swale up to the foundation wall. Is there a setback
requirement between the infiltration gallery and the building? We are currently proposing a 10’ separation between the gallery and the building. Please let me know what the City’s
requirements are for these scenarios. Thank you. I appreciate your help.
Chad
Chad Heimbigner, P.E., LEED® AP
Senior Civil Engineer
Coffman Engineers, Inc.
p 509.328.2994 | f 509.328.2999
LASTING creativity | results | relationships
Please consider the environment before printing this email.
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1_multipart?2_RE%3A Salmon Run - Swale ? Infiltration Gallery Cross Section.eml
Tami Merriman
Karen Bennett
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Heimbigner, Chad
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Heimbigner, Chad
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