HomeMy WebLinkAboutSEVEN OAKS ACADEMY'S LITTLE ACORNS - PDP - 48-01 - SUBMITTAL DOCUMENTS - ROUND 1 - DRAINAGE REPORTREFERENCE
Plats
1. The Market at Horsetooth Commons P.U.D. by King & Associates, June 5,1987
2. Seven Oaks P.U.D. by Water, Waste & Land, Inc., January 3,1995
3. Associates in Family Medicine P.U.D. by TST, October 15,1,998
Plans
1. Utility Plans for Seven Oaks P.U.D., Lot 3A of the Market at Horsetooth Commons, December 1994
Drainage Reports
1. Drainage Study for Horsetooth Commons Tract D by Redpeak Engineering, May 1987
2. Final Drainage Report for Lot 2, The Market at Horsetooth Commons by Shear Engineering
Corporation, September 1990
3. Final Drainage Report for Associates in Family Medicine P.U.D. by TST, September 17,1998
4. Final Drainage and Erosion Control Report for Seven Oaks P.U.D. by Water, Waste & Land, Inc.,
December 15,1994
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+ FIGURE 2 Dale. OCT 1994
4Yi�Sr1 E DRAINAGE STUDY Project:
SEVEN OAKS P.U.D. 94415200
& [AND
—. INC.
11
BASIN SUMMARY
Basin
Designation
Area
Acres
Runoff
Discharge'
Point
Description
P1
1.5
P1
i
Parcel 1, Associates in Famiiy Medicine P.U.D.
1
0.6
1
Lot 1, The Market at Horsetooth Commons P.U.D.
2
0.7
2
Lot 2, The Market at Horsetooth Commons P.U.D.
A
2.1
3
Lots 3A & 3B, Seven Oaks P.U.D.
B
0.2
4
Northeast Corner of Lot 36, Seven Oaks P.U.D.
RS
1.5
5
South Half Richmond Drive, Part of Shields Street
RN
NA
6
North Half Richmond Drive and Areas West
HN
0.6
7.
North Half Horsetooth Road
Total
7.2
As the building footprint and associate parking, drives and sidewalks for Lot 3B became finalized, it
became apparent that the existing Pond B could not be utilized. Site improvements which affected the site are
outlined as follows:
1. Continue parking concept as completed for Lot 3A.
2. Provide an enhanced pedestrian connection to Richmond Drive.
3. Provide a larger play area for the existing facility on Lot 3.
4. Eliminate the existing severity of the grading on Lot 3B by flattening slopes.
5. Allow proposed pond to be used for open areas.
6. Combine parking area and remove parking area from detention area.
7. Provide pedestrian circulation between rear and front parking areas and between Lot 3A and Lot 3B.
8. Provide play areas which could be fenced.
SPECIFIC DESIGN ELEMENTS
This analysis used information developed from the original report for the Seven Oaks P.U.D. and
modified as needed. Basins A, B and C represent the entire drainage area for Lot 3D and 3C. (See Figure
3 — Water, Waste & Land, Inc.'s Drainage Study.) These basins were modified as follows:
1. Basins A and B combined to drain into one detention pond between Lots 3A and 3B.
2. Basin C remains unchanged.
3. A portion of the northeast comer of Basin A will now discharge directly into Richmond Drive. This will
be identified as Basin A-N.
4. Discharge from Basins D and E (Lots 4 and 5) will be separated from Pond A and will be routed directly
to the 15" outlet pipe.
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Kingston Woods P.U.D. 2nd Filing. A copy of the pertinent report pages is included as Attachment A to this
report.
MINOR BASIN DESCRIPTION
Because of capacity restrictions in the 36" storm drain along the west side of Shields Street, it was
proposed that lots 1 through 5 of the Market at Horsetooth Commons P.U.D. detain developed flows and
release only historic flows into the storm drain. Lot 1 (Schraders Country Store) and Lot 2 (Choice Travel)
detain within paved parking areas and discharge directly into the 36" storm drain. Lot 3A and 3B currently flow
to Detention Pond A and Detention Pond B located mostly on Lot 3B. A 15" outfall storm drain conveys water
from Pond A to the regional 36D storm drain. Pond B discharges directly into Richmond Drive through an outlet
structure and sidewalk chase. Lots 4 and 5 have been combined into one lot as part of the Urgent Care Center
completed by the Associates in Family Medicine. A detention pond is located at the east end of the lot. This
detention pond outlets into Detention Pond A on Lot 3B.
PROPOSED DRAINAGE DESIGN
' Conceat
in conformance with the criteria established with the Foothills Basin Master Plan and Drainage Report
completed for the Market at Horsetooth Commons, each lot shall detain all developed flows and release runoff
generated from the sites at a historical rate as defined by a two year storm event.
The runoff patterns for the entire subdivision as well as required improvements are currently in place.
The needed drainage improvements for Lot 3A and Lot 3B are combined as Pond A, Pond B and associated
outlets. These improvements are sized for the ultimate buildout of both sites as indicated by the Seven Oaks
P.U.D. Drainage Report completed by Water, Waste and Land, Inc. attached as Appendix 2.
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located on the site. Lot 3B is located within a fully developed commercial subdivision. The original Seven
Oaks Child Development Center is immediately west of this site as lot 3A. Lot 3A provides developed parking
and landscape edges against which the new facility will be built.
ADJACENT LAND USES
An Urgent Care Medical facility owned by Associates in Family Medicine is adjacent to the south edge
of the site. A private roadway with curb and gutter runs between the two facilities. A convenience store
(Schrader Oil) and a travel agency (Choice Travel) are located to the east of this site. A private, 30' wide
roadway with curb and gutter runs between these existing commercial facilities and the proposed project.
Residential structures are located north of this site. Richmond Drive runs between these structures and Lot
This proposed project site is the only remaining undeveloped parcel in the area. All utilities, drainage
and roadway improvements are in place and functioning adjacent to and surrounding this site.
MAJOR BASIN DESCRIPTION
The site is situated in Basin V of the Foothills Drainage Basin as identified in the 1981 Basin Master
Plan prepared by Resource Consultants, Inc. (1). Lots 1 through 5 of the Market at Horsetooth Commons drain
to the 36" storm drainage pipe which conveys water north along the western side of Shields Street and then
east within the Foothills Basin. All storm drainage from this development will be conveyed to this 36" pipe as
shown on the Drainage Study Plan. All storm drainage from this development will be conveyed to this 36" pipe
as shown on the Drainage Study Plan. Upstream flow which previously were to be routed through the Market
at Horsetooth Commons have been rerouted to the Spring Creek Basin in accordance with the approved
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FINAL
DRAINAGE
AND
EROSION CONTROL REPORT
FOR
SEVEN OAKS ACADEMY'S LITTLE ACORNS
(Lot 3B, Seven Oaks P.U.D.)
3507 Richmond Drive
(Foothills Basin)
INTRODUCTION
This report has been prepared in conjunction with the development of detailed site topography and
final construction plans for the Seven Oaks Academy's Little Acorns.. It is the intent of this reportto address
drainage related issues and provide solutions to any problems identified in accordance with the criteria
established by the "City of Fort Collins Storm Drainage Criteria Manual".
PROJECT LOCATION
This project is to be located on Lot 313 of the Seven Oaks P.U.D. This 1.117 acre lot was created in
1994 when lot 3 of the original Market at Horsetooth Commons P.U.D. was split into two parcels,(see Figure
1 Vicinity Map and Figure 2 Plat Map). More generically this site is located along the south side of Richmond
Drive one dock west of Shields Street and addressed as 3705 Richmond Drive. This parcel is located entirely
within the Southeast Quarter of Section 27, Township 7 North, Range 69 West of the 61h Principal Meridian, City
of Fort Collins, Larimer County, Colorado.
EXISTING SITE DESCRIPTION
Lot 3B is a vacant parcel located within the Seven Oaks P.U.D. The site has a vegetative cover of
natural grasses and is graded for the development of a future. building. Two existing detention ponds are
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LIT OF FIGURES
Figure 1
Vicinity Map
Figure 2
Plat Map
Figure 3
Water, Waste & Land Drainage Study
LIST OF APPENDICES
Appendix 1 Pond Calculations
Appendix 2 Water, Waste & Land report excerpts
4
TABLE OF CONTENTS
Certifications........................................................................... i
i
Listof Figures.......................................................................... ii
Introduction........................................................................... 1
ProjectLocation.......................................................................
Existing Site Description.................................................................. 1
AdjacentLand Uses.................................................................... 2
Major Basin Description.................................................................. 2
Minor Basin Description.................................................................. 3
Proposed Drainage Design............................................................... 3
Concept....................................................................... 3
Specific Design Elements................................................................ 4
Reference............................................................................ 5
3
CERTIFICATIONS
OWNER
Seven Oaks Academy's Little Acorns of West Fort Collins, Inc, a Colorado Corporation, hereby certifies that
1 the drainage facilities for the proposed Seven Oaks Academy's Little Acorns facility shall be constructed
according to the design presented in this report. I understand that the City of Fort Collins does not and will not
assume liability for the drainage facilities designed and/or certified by my engineer. I understand that the City
of Fort Collins reviews drainage plans pursuant to Colorado Revised Statutes Title 30, Article 28; but cannot,
on behalf of Seven Oaks Academy's Little Acorns of West Fort Collins, Inc., a Colorado Corporation, guarantee
that final drainage design review will absolve the Seven Oaks Academy's Little Acorns of West Fort Collins,
' Inc. and/or their successors and/or assigns of future liability for improper design. I further understand that
approval of the Final Plat and/or Final Development Plan does not imply approval of my Engineers design.
Seven Oaks Academy's Little Acorns of West Fort Collins, Inc.
Mr. Larry Neal
1 ENGINEER
I hereby certify that this report for the Final Drainage and Erosion Control Report for the Seven Oaks
Academys Little Acorns facility was prepared by me in accordance with the provisions of the City of Fort
Collins STORM DRAINAGE DESIGN CRITERIA and CONSTRUCTION STANDARDS for the owners thereof.
I understand that the City of Fort Collins does not and will not assume liability for drainage facilities designed
by others. ,
Respectfully Submitted,
Jeffrey W. Couch, P.E.
Colorado Professional Engineer No.16584
For and on Behalf of Team Engineering, Inc.
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December 15, 2001
Mr. Basil Hamden
City of Fort Collins Utilities
700 Wood Street
Fort Collins, CO 80521
RE: Seven Oaks Academy's Little Acorns — Final Drainage and Erosion Control Report
(Lot 3B, Seven Oaks Planned Unit Development)
(Foothills Basin)
Dear Basil:
We are submitting this Final Drainage and Erosion Control Report and Plans for the Seven Oaks
Academy's Little Acorns facility to be constructed along Richmond Drive just west of Shields Street.
This site was created in 1994 as part of the Seven Oaks PUD. The drainage concept developed by
Water, Waste and Land, Inc. provided for two detention ponds to control runoff for lots 3A and 3B.
We are modifying this concept as follows:
1. Combine the two existing detention ponds into one pond.
2. Create a larger pond to comply with 1997 hydrology changes.
3. Provide a water quality feature as required by updated Stormwater Criteria.
4. Separate the outfall for the lot 5 site (Urgent Care facility) by relocating their existing outfall.
5. Create a detention pond that will function as usable open space.
This analysis has been completed to be in conformance with the City of Fort Collins Stormwater
Criteria.
Please contact me at (970) 231-9937 if you have additional questions.
' Sincerely,
Jeff Couch, P.E.
Team Engineering, Inc.
Cc: Larry Neal, Seven Oaks Academy's Little Acorns of West Fort Collins, Inc.
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FINAL
DRAINAGE
AND
EROSION CONTROL REPORT
FOR
SEVEN OAKS ACADEMY'S LITTLE ACORNS
(Lot 313, Seven Oaks Planned Unit Development)
(Foothills Basin)
December 15, 2001
' Prepared for:
Mr. Larry Neal
Seven Oaks Academy's Little Acorns
of West Fort Collins, Inc.
3507 Richmond Drive
Fort Collins, Colorado 80526
(970)201.9200
Prepared by:
Jeffrey W. Couch, P.E.
Team Engineering, Inc.
906 Richmond Drive, Unit No. 2
Fort Collins, CO 80526.5973
(970)231-9937
Project Dumber 729-0102