HomeMy WebLinkAboutFile Documents.1300 Riverside Dr.0309.2017 (10).ARBK Josh Rice, P.E.
Woody Creek Engineering
WOODY CREEK 557 North Mill Street
ENGINEERING Suite 201
Aspen,Colorado 81611
(970)429-8297
July 3,2018
Trish Aragon
City Engineer
City of Aspen
201 North Mill Street
Aspen,Colorado 81611
RE: Variance Request for 1300 Riverside Dr.,Aspen CO
Trish Aragon:
Please accept this letter as a formal variance request for a modified drywell system located at
1300 Riverside Dr.
The variance process is described in the City of Aspen Municipal Code Section 29.01.060. The
process is summarized and addressed below:
29.01.060.A: The City Engineer may grant variances.
We are submitting this variance to your review.
29.01.060.B: Standards:
1. There exist practical difficulties and unnecessary hardships
inconsistent with the purpose and intent of the design standards.
There is a high groundwater table that prevents us from utilizing
the standard 12-ft deep drywell.
2. The issuance of a variance shall not compromise the safety of a
site or structure.
The issuance of the variance will not compromise the safety of
the site or structure.
29.01.060.C: Application:
1. The criteria from which the applicant seeks a variance.
We request a variance from the URMP's drywell detail.
2. A written justification outlining why the criterion cannot be met.
The URMP drywell guidance requires a minimum distance from
groundwater. Groundwater elevations in this location does not
allow for the standard URMP 12-ft minimum depth drywell.
Variance Request for 1300 Riverside Drive,Aspen, CO
July 3,2018
Page 2
We have looked at utilizing pervious pavers in combination with
tree credits to provide WQCV&Detention, but the areas are
inadequate to provide the necessary area and volume.
3. An alternate criteria or standard that is proposed to comply with
the intent of the criteria from which the variance is sought.
We have designed the drywell to meet the drain time requirement
as well as meet the minimum distance to the groundwater. This
requires a shorter drywell.
WQCV and 100-Year Detention are still met by the alternative
drywell.
4. Supporting documentation.
Please see submitted plans.
5. An explanation of any potential adverse impacts of the proposed
variance to adjacent landowners.
We do not expect any adverse effects.
6. Analysis of variance request by professional engineer.
Please consider this letter my analysis.
We understand that if higher groundwater elevations are
encountered, a change order will be submitted to address
modifications to the drywell.
Sincerely, 0,0„„•
,,, ,
93„00 LP,
7/3/2018
Josh Rice,P.E.
Woody Creek Engineering, LLC 427
SS/ONA1.�,,,.''