HomeMy WebLinkAboutPOWERHOUSE 2 - PDP220006 - SUBMITTAL DOCUMENTS - ROUND 4 - VARIANCE REQUEST (2)
NORTHERNENGINEERING.COM | 970.221.4158 VARIANCE REQUEST: POWERHOUSE 2
FORT COLLINS | GREELEY 1 | 1
VARIANCE REQUEST
September 26, 2022
City of Fort Collins
Development Review
281 N College Ave.
Fort Collins, CO 80524
RE: POWERHOUSE 2 PROJECT
MINIMUM FLOWLINE GRADE VARIANCE REQUEST
NORTHERN PROJECT #207-030
To whom it may concern:
Northern Engineering would like to present this request for a variance for the Powerhouse 2 project. General information
about the project is presented below, and detailed information about the nature of this request follows.
General Information
The project site is located at the northeast corner of College Ave. and Vine Dr. in north Fort Collins. The site currently houses
an auto repair shop and is proposed to be developed into a non-residential development, including a multi-story building
utilized by the Colorado State University Energy Institute for office space, education, and research purposes, among others.
The size of the combined site contains just under 5 acres and includes the Josh Ames Ditch on the north edge of the site.
Vine Drive
Vine Drive runs along the south edge of the property. Larimer County Urban Area Street Standards (LCUASS) Table 7-3
dictates that the minimum grade in a street flowline shall be 0.5%.
Design constraints, including minimal vertical fall across the site, make it difficult to achieve this requirement. Discussions
with City staff led to the recommendation to submit this variance request regarding the flowline grades.
We would like to propose a minimum allowable flowline grade of 0.4% along the frontage of the Powerhouse 2 site with Vine
Drive. 0.5% grade will be implemented wherever possible, and 0.4% will be used as a minimum (holding as close to 0.5% as
possible when the need arises to design to less than 0.5% grade).
The adjustment in flowline grade will still effectively convey runoff flows to stormwater improvements.
If you have any questions, please feel free to contact me directly.
Sincerely,
NORTHERN ENGINEERING SERVICES, INC.
AUSTIN SNOW, PE
Project Engineer