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HomeMy WebLinkAboutFOUR SEASONS PUD SECOND - Filed GC-GENERAL CORRESPONDENCE - 2003-11-12M&I consulting engineers 4710 South College Ave. Fort Collins, Colorado 80525 Telephone (303) 226-2323 M S I Job No. 1377-020 April 2, 1980 Mr. Stephan McMillan Chism homes Inc. 4,730 South College Ave. Fort Collins, CO 80525 RE: Four Seasons Second Filing P.U.D. Storm Drainage, Project No. 1377-020 Dear Mr. McMillan: The following is a letter report addressing the storm drainage analysis for Four Seasons Second Filing, a P.U.D. located southeast of the inter- section of Horsetooth Road and Shields Street in Fort Collins, Colorado. This report proposes a series of improvements which will provide groper intermediate storm water runoff management. This report is closely cor- related to a drainage report previously done by our office for Four Seasons P.U.D. First Filing in January 1979. It conforms to the storm drainage criteria of the City of Fort Collins. All calculations pertain- ing to this letter report are available on request from this office. In the quarter -section in which Four Seasons Second Filing lies, the only improved area is Four Seasons First Filing (see shaded area, 7.xhibit No. 1). The First Filing has existing detention ponds for managing most of its associated r_roff. The runoff from basin L-de (see Exhibit No. 1) flows from the first filing to the second filing through Tradition Drive. As stated in the previous drainage report the existing topography defines two drainage basins (shown on Exhibit No.l). n e southern basin does not contribute to the runoff picture of this filing and is not considered in this report. me northern basin topography is comprised of gently roll- ing features basically sloping from west to east. The City of Fort Collins requires an improved site to limit its runoff to the amount rasuliing from a 2-year frequencv storm occurring while the sits is in its natural state. To accomplish this, it is usually neces- sary to design a detention pond with a total storage capacity of the msx- imum difference between the 100-year storm runoff from the developed area and the 2-year historical flow. An outlet structure is designed to limit the flow to the 2-year historical runoff va'_ue. Mr. McMillan April 2, 1980 Page 2 The amount of storm water runoff for the area, individual basins and streets was determined by the rational method. This procedure equates the design peak flow to the total area, amount of rainfall on that area, and a multiplier that is determined by the physical characteristics of the area under study. The rational method is commonly employed in the design of barrow ditches and storm sewer systems. The bulk of the pro- cedures, methods and numerical constants were obtained from the Urban Storm Drainage Criteria Manual, published by the Denver Regional Council of Governments. The rainfall intensity duration curves used in this report were developed by the City of Fort Collins Engineering Department. The approach taken to develop a drainage plan for Four Seasons Second Filing was effected by the offsite area generally to the west, south, and north of the proposed development site. The proposed site was divided into two sub -basins A and B (see Exhibit No. 1). Sub -basin A outlets to the south and sub -basin B outlets to the east. In order to control the outflow generated by these sub -basins, it is proposed that southern and eastern interim detention ponds (see Exhibit No, 1) be built. A final detention pond (see Exhibit No. 1) would be built as further development would require. The eastern temporary _pond volume _is sized from the combined areas of sub -basins B,and_L-4e. The outfall of this pond, 2.15 ---- -- ---- --- --- cfsl is the 2-year historical outfall of these combined areas and also -- - -- includes the autfaIT -from the greenlie2t -area- -1ne-C een f6e-first and second filings. The onsite and offsite flows are to be routed to the eastern pond via a shallow trapezoidal channel (see Exhibit No. 1). The_southetn temporary pond will provide adequate detention -for _ yb-basin A and _pro- vide an overflow weir topass the-_offsite historical 100-year flow. The outfall from sub -basin A, 1.81gf�s, _had no suppleme it yr flowrto amass. The onsite and offsite flows will be routed via shallow trapezoidal chan- nels to the southern pond. Both temporary ponds will be bermed to facil- itate the required volumes. Both ponds will also have trapezoidal chan- nels daylighting to natural ground from their outfalls. The drainage patterns of the second filing are modified from our Preli--i- nary Drainage Study, dated January, 1979. By causing the cul-de- sacs of the Four Seasons Second Filing to drain to the south and west into Cen- tury and Michie Drives instead of draining into the green belt area between the first and second filing. This causes an increased flow in Century and Michie Drives, but does not exceed the Fort Collins street inundation criteria. This design will satisfy hydrologic considerations and provide adequate detention volumes until further development requires the proposed final detention pond to be built. It is recommended that the storm water run- off be routed as shown on Exhibit No. 1 and the detention ponds be sized according to the detention volumes shown on Exhibit No. 1. Mr. McMillan April 2, 1980 Page 3 Please feel free to contact us with any comments or questions. Very truly yours, M 6 I, INC. Jim R. Allen E.-L.S. Robert Sutter— architects 'planners drake office center_ . 333 w. drake road ft. collins, colorado 80526 (303) 223 - 5198 City of Fort Collins Department of Community Development P.O. Box 508 Fort Collins, Colorado 80522 Subject: M-2 Area PUD of Four Seasons Devel Dear Sirs: May 15, 1979 nient, Fort Collins, Colorado. The intention of this letter is to present the required written documentation for preliminary PUD submittal which has not been included on the site plan submitted with this letter. This information shall include the considerations allowed in developing the design layout as presented and the advantages gained in this par- ticular PUD. Additional information as to the site conditions and suitability for development, drainage, utilities, ownership, phasing, ?tc. shall also be provided. This information shall be divided into the following categories: Objectives of this PUD, Design Analysis, Design Development, Advantages of this PUD, Develop- ment Information, and Summary. I. Objectives of the PUD The main objective of the PUD is to provide a harmonious development both within and to the exterior elements that provides maximized visual and functional comfort that is also economically feasible for development. Maximum density should be. realized and yet an aesthetic blend most be accomplished compatible with other surrounding elements in the master plan. Maintenance free living, as much as possible, is a goal to be met. Therefore a patio home and townhome concept.will be developed since these concepts are both compatible with maintenance free living as well as the seven to eight unit per acre density allowed for this portion of the master plan. II. Design Analvsis The location of the property is fronting Horsetooth Road on the north of the Four Seasons master plan. The Four Seasons master plan is located at the southeast. corner of West Horsetooth Road and South Shields Street. The M-2 site is 10 - acres in size. City of Fort Collins M-2 Area PUD of Four Seasons May 15, 1979 page 2 Natural drainage on the site is generally to the east at approximately one percent. Detention will be accomplished in an over lot system in the green belt areas and parking areas. Sanitary sewer, water, natural gas, electric power, and telephone will be available from both the north and south boundaries of the site. Soil conditions are suitable for this type of development although the water table elevations will limit buildings_ to slab on grade, crawl space, or garden level. A soils investigation has been conducted on the site by Empire Laboratories of Fort Collins, Colorado. Fire protection will influence the configuration of buildings and auto circulation systems on the site to provide for the protection of life and property. Building separations will be 10'-0 '' to 15-'0" minimum and all building sides will be within 150'-0" of fire truck access. Hydrants will be strategically planned and located for adequate service and coordination with the master plan. No curb ruts will be utilized on Horsetooth Road and landscaping will be utilized to buffer housing from both noise and traffic generated by this traffic artery. Separation of pedestrian and auto traffice on the site is considered a major design requirement. Building orientation should be such as to prevent, as much as possible, direct views between buildings. Landscaping can be utilized to further protect, buildings from direct views between structures. II1. Desiqn Development It is desired to provide as many as possible patio homes in the total mix of housing on the site and still maintain maximum density. Town- houses will then be developed to supplement patio homes and provide for more effective utilization of space. A total density of seven to eight units per acre is to be achieved. Patio home lots will be located at the east end of the property for com- patibility with the low density housing located there. Townhomes will then be developed at the west of the Project where they will be more compatible with future higher density housing and commercial development to be located in the west of the master plan. Garages for two automobiles will be provided for the patio homes. The townhome area will be provided with detached single car garages or car- ports —one per unit. Additional parking in the townhome area will be in open parking lots. City of Fort Collins M-2 Area PUD of Four Seasons May 15, 1979 page 3 Street width in the patio home area will be 26'-0" wide. It is felt that due to the numbers of curb cuts and perpendicular parking on both sides of the streets in this area, parallel parking on either side is unlikely to occur in most areas. A wider street would only be providing more driving lanes. The narrower street, because of the unlikelyhood of parking on it, would still provide the proper widths necessary for adequate fire protection. All patio homes will be platted into subdivided lots. It is anticipated that townhome areas will be subdivided also. An Architectural Control Committee will be established to control the aesthetic: appearance of buildings erected on marketed lots. Homeowners agreements will provide for maintenance of structures which are not respon- sibly maintained by the owners. The Homeowners Association will also provide for the upkeep of paved areas not dedicated to the City of Fort Collins as well as common green belts. IV. Advantages of this PUD The mix of housing on this property and its configuration is compatible with other elements of the master plan for Four Seasons. The provision of private roads and parking minimizes the effect of curb cuts on the public streets surrounding the parcel. Parking has been generally enclosed throughout the project to minimize the impact of open parking lots and enhance the marketability of the project. Building set -backs at the streets have been made irregular to minimize monotony of street scape. Major open spaces have been provided for the higher density areas of the site to separate structures and provide recreation for the higher concen- trations of population. Separation of pedestrian and automobile has been maximized Fire protection requirements have been met. Direct overlook between structures has been minimized. Maximum parking has been allowed. Double loading of most utility mains. V. Development Information It is anticipated that the project will be built over the next two to four year period. Phasing of the project is indicated on the drawings with City of Fort Collins M-2 Area PUD of Four Seasons May 15, 1979 page 4 Phase One beginning in the fall of 1979, Phase Two in the spring of 1980, and Phase Three in the fall of 1980 or spring_ of 1981. At this date it is anticipated that the present owner of the site, Chism Homes, Inc., will build out the entire site. Market demands will dictate the exact mix of two and three bedroom units to be built in both the townhome and patio home areas. Parking is pro- vided to meet any combination since the maximum (two spaces/unit) is provided. Building enveolpes are intended to indicate a close proximation of build- ing coverage required but may vary slightly upon determination of market- ing demands as to two and three bedroom mix. Townhomes will be two stories in height. Patio homes will be ranch, garden level, or loft type structures. The character of the PUD will be established in a contemporary style with wood stud construction and possibly some masonry treatment. Landscaping will be used to accentuate and enhance the visual impact of the site and structures and soften parking areas and structures. Roof lines will be pitches and somewhat varied. The following is a summary of site information and data: Total Area of PUD 10.0 ± a. 100% Number of Units 35 Patio Homes 40 Townhomes 75 units Area Covered by Building Envelopes 35 P.H. & garages x 1730 + s.f. 1.4 + a. 40 T.H. & garages x 800 - s.f. 79 a. 275 { a. 25%' Area Covered by Auto Circulation/Drives Townhome parking & circulation, .7 f a. Patio home parking & circulation .9 - a. Total paving less walks 1.6 a 16% Total Remaining Area to Commons Based on Building Envelopes not Coverage 5.9 + a. 59% Total Area to Active Recreation Space 1.5 ± a. 15% City of Fort Collins M-2 Area PUD of Four Seasons VI. Summary May 15, 1979 page 4 This PUD provides for a maintenance free, harmonious, and pleasant living atmosphere and it will blend with surrounding elements of the Four Seasons master plan. It is efficiently and economically composed. We hope that these comments will serve to explain the approach and reason- ing utilized in the development of this submitted plan. We look forward to presenting the plans to the Planning Board and Fort Collins City Councl. Cordially�—�f' Robert A. Sutter, A.I.A. Copy: Chism Homes, Inc. CITY OF FORT COLLINS COMMUNITY DEVELOPMENT DEPARTMENT, PLANNING DIVISION September 23, 1985 Mr. Dan Wheeler PO Box 519 Greeley, CO 80632 Dear Dan, As per our conversation today, I am writing this letter to confirm the conditions by which I will allow the Second Phase of Four Seasons`jio be heard At the September 25th Meeting of the Planning and Zoning Board. Because one of the parties (Ron Strahle) who owns the land to the east and from whom you are seeking an easement is out of town and unable to be reached and because I have a copy of a letter agreeing to work out the easement, I will allow the item to be heard with the following two conditions. Before the City will file the project the easement must be submitted as well as the documentation for handling the street name changes. This must be accomplished within 30 days from the date of this letter. Because the detention pond cannot be built without this easement, you will be unable to get more than 35 building permits for Four Seasons Fifth both phases, until the storm drainage improvements are completed (as per the Development Agreement). Please see that this is accomplished in a timely manner. Sincerely, % Bonin e Tri pol i Development Coordinator CC: Dave Stringer, Chief Construction Inspector