HomeMy WebLinkAboutPVH HEALTH SYSTEMS, HARMONY CAMPUS, 3RD FILING, PRIMARY CARE PLAZA - PDP - 32-98E - SUBMITTAL DOCUMENTS - ROUND 2 - DRAINAGE REPORTSEAR• BROWN
Wednesday, March 31.2004
Basil Hamdan
City of Fort Collins
Storm Water Utilities
700 Wood Street
Fort Collins, CO 80521
2095outh Meldrum
Fort Collins, CO 80521
970.482.5922 phone
970.482.6368 fax
www.searbrown.com
RE: PVHS Harmony Campus Primary Care Plaza Addendum to the PVHS Harmony Campus
Master Infrastructure Drainage Report.
Dear Basil:
The Primary Care Plaza is a project that consists of an office building and parking (2.6 ac) that is
located at the southeast corner of Snow Mesa Drive and the north access road. The purpose of this
addendum is to show compliance with the PVHS Harmony Campus Master Drainage Plan.
The site is now a fallow field that drains to the south and southeast. In the proposed condition,
the site will be located in drainage basin 107, as shown in the PVHS Harmony Campus Master
Infrastructure Drainage Report, dated February 11, 2004. The current site tits within the 80
percent impervious area assumption that has been made in the Master Drainage Plan. Basin 107
releases at a 10-year flow rate of 11.68 cfs and a 100-year flow rate of 33.63 cfs. The site will
drain via curb and gutter, cross -pans, area inlets, storm drain, and temporary swales to the east
and into a permanent swale, located along the east PVH property line. The permanent swale will
transport the runoff south, under the fire lane, and into the partially constructed detention pond. It
is anticipated that there will be some form of a permanent swale along the eastern property line of
PVHS Harmony Site. The location of the swale may be relocated in the future depending on how
development occurs.
The detention pond will be partially constructed at this time. The outlet structure will be
constructed in its final form with the orifice size being constructed for entire the site. The
detention pond will be constructed to approximately a third of its ultimate size.
Erosion Control will be addressed with the final drainage report of this project by incorporating
best management practices.
Thank you for your time and consideration. If you have any questions, please let me know.
Yours S' erely"Manager
4Jim AlleSenior Pr