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Building | Architecture | Design LTD
JanuARY 15, 2021 VIA ELECTRONIC SUBMITTAL
CITY OF ASPEN COMMUNITY DEVELOPMENT
BUILDING DEPARTMENT
130 S. GALENA ST.
ASPEN, CO 81611
RE: CHANGE ORDER RE-SUBMITTAL NARRATIVE (CO PERMIT #0032.2020.BCHO)
New-Build PRIVATE RESIDENCE • GRADING & DRAINAGE PLAN REVISION
813 W. SMUGGLER STREET, ASPEN, CO 81611
TO WHOM IT MAY CONCERN:
As you know, we submitted a Permit Change Order application in May 2020 that proposed
short site retaining walls along the Si Johnson Ditch easement that will require some sub-
grade drainage, for our “RL3” project at 813 W. Smuggler.
In late-June 2020, the CO Permit application was approved by CoA Zoning. On July 7, CoA
Engineering (& Building) requested a detail of the proposed wall, assuming it was over 4’H
in total. On 12 December 2020, we responded with a detail of the proposed steel plate re-
taining wall, and included the previously submitted Grading/Drainage plan that indicates
the proposed wall never exceeds 2’ in height, thus no stamped detail is required for review
& approval. Remaining issues, as listed by in a 12/16/2020 email from CoA Engineering, are:
1. “Regarding grading, Engineering Standards allow no greater than a 3:1 slope. On
your resubmitted plans, please show that this is accomplished.”
Response: The reissued Grading & Drainage Plan (Sheet C.1.002.), prepared by
High Country engineering, now has added notation that clearly indicates that no
grade on-site exceeds 3:1.
2. “It is imperative that no excavation take place within the ditch easement. Call out
means and methods in your resubmitted plan-set to ensure constructability without exca-
vating in ditch easement.”
Response: We will respect CoA’s imperative as follows: The easement line will
be re-surveyed & flagged for confirmation. As part of the scope-of-work anticipated
by this Permit Change Order application, there will be no additional excavation per-
mitted in the Si Johnson Ditch easement. Any excavation to expose the retained grade-
cut will be made by hand, and will occur from the west side of the easement. It is
understood that, in the nature of materials, some soil may slump prior to placement
of the retaining wall, but will be replaced as needed. The 1/2” steel plate retaining
wall design (≤2’H) has been chosen specifically to be as thin as possible, and be em-
bedded in-place near, but not over, the easement line. The wall will be secured by
welded steel tabs back to the existing micro-pile wall cap. These tabs will be at the
top of the steel plate wall, and will not require excavation in the easement to se-
cure. It is understood that the easement grading will be left as originally found,
along with improvements to scarify and enhance the low-permeability barrier of the
ditch bed as required by Aspen Water.
Along with the revised Civil drawing, which incorporates the above language by reference,
we include the structural detail of the short retaining referred to above.
PLEASE CONTACT ME DIRECTLY WITH ANY QUESTIONS OR COMMENTS. YOU CAN ALWAYS REACH MY CELL AT
970-948-4269 OR EMAIL: ROB@SIN-BAD.COM.
SINCERELY,
ROBERT G. SINCLAIR AIA
01/26/2021
Reviewed by Engineering
02/02/2021 2:07:39 PM
"It should be known that this review shall not
relieve the applicant of their responsibility to
comply with the requirements of the City of
Aspen. The review and approval by the City is
offered only to assist the applicant's
understanding of the applicable Engineering
requirements." The issuance of a permit based
on construction documents and other data shall
not prevent the City of Aspen from requiring the
correction of errors in the construction
documents and other data.