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Home My WebLink AboutSTONERIDGE PUD, FIRST FILING FINAL - 21-92D - SUBMITTAL DOCUMENTS - ROUND 1 - VARIANCE REQUEST (3)November 25, 1992 Project No: 1305-01-92 Mr. Ted Shepard City of Fort Collins Planning Department P.O. Box 580 Ft. Collins, Colorado 80522-0580 NOV 3 0 9C2 D Re: Street Variance Request; The Courtyards at Stone Ridge P.U.D. Ft. Collins, Colorado Dear Ted, This letter is a supplement to the variance request presented by Vaught -Frye Architects in their letter to you dated October 6, 1992. The variance request concerns an amended proposed private street typical section. within the Courtyards area of Stone Ridge P.U.D. More specifically, the request is for approval to delete the drive -over curb, gutter and sidewalk on one side of the street (west side), delete the approved drive -over curb and gutter on the other side of the street (east side) and for providing three foot (T) wide valley pans on both sides of the street. Attached is a copy of the proposed typical street section with valley pan on both sides of the street. Also attached is a copy of a detail for the proposed valley pan. This is the same valley pan which was utilized in several areas of the Southridge Greens P.U.D. project. The concerns of City staff, as we understand them are as follows: 1. Effects on storm drainage street capacity 2. pedestrian safety The current typical street cross-section consists of a private drive with 28.5' flowline to flowline contained within a 28.5' utility, drainage and access easement. 12' utility easements are provided adjacent to both sides of the utility, drainage and access easement. The approved typical section considers drive -over curb, gutter and sidewalk on one side of the street (west side). 5.17' of the sidewalk encroaches on the dedicated 12' utility easement, leaving only 6.83 feet of usable easement on that side. Apparently, the curb, gutter and walk was added without compensating for the loss of usable easement. The approved site plan considers a 20' front building setback. The drive -over curb, gutter and walk sits within the 20' setback, leaving 14.83' of usable driveway. Attached is a copy of the typical section as currently approved, modified to reflect this information. Also attached is a copy of the illustration provided by Vaught -Frye Architects in their October 6 letter. We have analyzed the effects of storm drainage as well. Utilizing the peak flows at the major concentration points defined by RBD, Inc. in their drainage report for Stone Ridge P.U.D., the street capacity was determined to be more than adequate. Attached are sections from the approved drainage report and the street capacity references. The anticipated depth of flow in the street is shown on a copy of the proposed street typical section. Our conclusion is that the proposed street typical section has absolutely no effect on storm drainage. The October 6 letter by Vaught -Frye discusses the proximity of the Courtyards to the 8' bikeway and Fieldstone Drive sidewalks. Sidewalks along both sides of the entry to the Courtyards will be provided. These will be drive -over style. The proposed valley pans may serve for internal pedestrian circulation, though would be seldomly utilized since the generated traffic on the street would be minimal and walking on the edge of the street would be a safe condition. We would direct your attention to the Courtyards at Southridge Greens P.U.D. (previously Mail Creek 4836 S. College, Suite 12 Fort Collins, CO 80525 (303)226-5334 Develo ent Services Engineering Department May 17, 1993 Mr. Brian W. Shear, P.E. Shear Engineering Corporation 4836 S. College Avenue, Suite 12 Fort Collins, CO 80525 RE: Stone Ridge P.U.D. - Street Courtyards Dear Brian: Variance Request for the This letter is in response to your -letter dated November 25, 1992, regarding the above titled issue and considering changed conditions that have been discussed verbally with Bill Albrecht. Your letter described a request to build a valley pan in lieu of curb and gutter. Bill went ahead and built driveover curb and gutter and left off the sidewalk. Therefore, this response only addresses the request for variance to the sidewalk requirement. The variance to the sidewalk requirement is approved for the following reason. The approved plat for the development specified a setback for buildings at 20 feet from the private drive access easement (the gutter flowline of the drive). By adding sidewalk now, the distance between garage doors and the back -of -sidewalk would be only 16 +/- feet instead of the 20 feet required. Since vehicles parked in the driveways would block the sidewalk, the sidewalk may be left out. The following are conditions for leaving the sidewalk out: 1. Each lot shall have a handicapped accessible curbcut from the private street surface to the driveway. 2. If property owners desire to construct sidewalk in ,the future, the City shall not participate in the cost to add sidewalk. 3. Approval of this development to have no sidewalk in no way sets a precedent for other developments to leave sidewalk out. Each development project will have to stand on its own merits. Sidewalks connecting the private drive to the public street at the two cul-de-sacs and the two sidewalk on each side of the entry drive from the public street to the "T" intersection of the private drive, must still be provided. 281 North College Avenue • P.O. Box 580 • Fort Collins, CO 80522-0580 • (303) 221-6605 If you have any questions of need any clarification, please call me. Sincerely, ; - Mike Herzig Development Engineering Manager xc: Bill Albrecht Gary Diede Rick Ensdorff Ted Shepard wl�' Dave Stringer PAGE 2 November 27, 1992 Project No: 1305-01-92 Village at Southridge Greens P.U.D.). There is valley pan on only one side of the Private Drive. Low traffic volumes internally allow for safe and efficient pedestrian movement through Stone Ridge P.U.D. to dedicated streets. Consider that there are eight (8) units south of the entry to the Courtyards area at Stone Ridge P.U.D. There are twenty (20) units north of the entry to the Courtyards area. Actual peak traffic volumes within the Courtyards area occur at the entry drive to the Courtyards, not within the Courtyards. Supplemental traffic information was provided by Matt Delich for the Courtyards at Stone Ridge P.U.D. on November 25, 1992. The information provided by Matt Delich for the Courtyards area only is summarized as follows: * Total of 165 events per day (trips in and out) * Morning peaks: 2 trips in, 11 trips out (total of 13 vehicles) * Evening peaks: 11 trips in, 5 trips out (total of 16 vehicles) * Potential peak hour traffic utilizing peak hour factor of 0.70 * 16 / 0.70 = 23 vehicles in any one hour (average of 1 vehicle per 2.6 minutes) These projected peaks are to the entry drive, so the peaks to the north and to the south of the entry drive would be less. Various jurisdictions have allowed this same street section. We have recently completed a project in Lakewood, Colorado which has three foot (3') valley pans on both sides of the street. The project in question serves 55 units and has only one major access to the subdivision for vehicular use off of a main arterial, Old Kipling Street. There is a designated secondary fire access. The project is located at the southeast corner of the intersection of Old Kipling Street and Morrison Road. This street section is not new in Colorado and is seen in many communities in the state. Typically, jurisdictions allowing the 3' valley pans or other curb treatment, designate these streets as private streets. Our final conclusion is that the proposed typical street section has no potential damaging effects on the health, safety and welfare of the residents of the Courtyards at Stone Ridge P.U.D. or the general public. If you have Brian W. Shear, P.E --' Shear Engineering Corporation BWS / jmr cc: at 226-5334. Albrecht Homes Vaught -Frye Architects City of Fort Collins Storm Water Utility Mike Herzig; City of Fort Collins Planning attachments I 20' BLD G. SETBACK 812' ESMT. 28.5' ESMT. I 12' ESMT. UTIL., ACCESS 9 DRAINAGE DRIVEWAY ,;...•.: :..•.••..•b:•...., •.:.. DRIVEWAY I 3� VALLEY PAN 3� VALLEY PAN 0 TYPICAL SECTION PATIO HOME AR -EA PRIVATE DRIVE - 3.PA N N.T S. Izdpf �� wES7 r tr 12' dI EASEMENT jI 101 -- 14.83, vwVEwAy 28.5' EASEMENT tmurl /VZ"L>A.E1Ac 28' fE E VARIES 1.5 0-3.57. DRIVEOVER CURB, GUTTER & SIDEWALK I EAST r 12' EASEMENT ` TYPICAL SECTION PATIO HOME AREA PRIVATE DRIVE PAVEMENT SECTION ALTERNATIVES Brownstone Ct., Groystone Ct., Blackstone Ct. and Patio Home Area Private Drive Asphalt Concrete 3" Crushed Aggregate Base Course �= Total Pavement Thickness 11" Asphalt Concrete 2" Plant Mix Bituminous Base Course 4" Totul Puvement Thickness G" Kingsley Drive Asphalt Concrete 3" Crushed Aggregate Bose Course 10" Total Pavement Thickness 13" Asphalt Concrete 2" Plant Mix Bituminous Base Course 4 1/2' Total Pavement Thickness 6 1/2" Fieldstone Dr. (Horsetooth Rd. to Groystone Ct.)" Asphalt oncre a 3" Crushed Aggregate Base Course 11" Total Pavement Thickness 14" or DRIVEOVER CURB & GUTTER Fieldstone Drive (Graystone Ct. to Kinqslev Dr. Asphalt Concrete 3" Crushed Aggregate Bose Course, 6" Select Subbase .L Total Pavement Thickness 16" Asphalt Concrete 1 3" Plant Mix Bituminous Base Course Total Pavement Thickness 7" Horsetooth Road Asphalt Concrete 4" Crushed Aggregate Base Course 8" Select Subbase 17" Total Pavement Thickness 29" Asphalt Concrete 4" Plant Mix Bituminous Base Course 7 1/2" Total Pavement Thickness 11 1/2" Asphalt. Concrete 3" Crushed Aggregate Bose Course 6" * FULL DEPTH ASPHALT PAVEMENT Select Subbase 5" IS REQUIRED FROM STA. 0+40 Total Pavement Thickness 14" TO STA. 2+82 Asphalt Concrete 2" Plant Mix Bituminous Base Course �5.."_ 3 v 1■l V - �y i (.R/VN (YJi EA41 6�OG THE GOURTYAKDS AT 57oNE RIDGE - 5TR=ET5CAM V^UGHT FRYE ARc-HjTEGTrj 1o•t4.9z C.ovT� "C,xs onrE ,125I5` 136�7-41-SZ 2 ----..—.,_----3 n ' kb ioviu.— s�Ye�e�� _---•---�'---- \��1$� A CLZI3, 5'1-L �7 _,Wl—�riuc ouw cv�b� 54}�i�,--------- i r—_= ��-------- � 10 ..__-_"_`_-.-_.-...__._.___ _ _ �iJ_ _f\e�vC�\pjV �ic�•a,i - QG\�- b�a1 G%� .�bai)N g U• O G� �•1UV � .,�/ 12 -Z �6.5 ► -1 ,4 ' ---------------- ,s C� ��.� fsro,� o�,Je• col o---=irgr�jl'0�—��ty'(�a,� -� - 0l17 3TS4 --------20 ifs 2, 22 51a4v 6. ��c�\\jL' -\ k 23 CaNc,\\e.- 2•S. cJ -------7- -Y0"`-- ` —►� c v 0yl. ��c how S�J1� , j _..jls}}c• slor -- e.,eru.LCv�t 2(3 1 1 l S 1.a.\\ �NGfc�:4�___L�e„_._�<<�_d'--W=L�'�u�--•I�Rr�M�.Fc/ _'�,/�er�_h, Y2�LUGinJ— '';%Q. I PAGF: S � U-�1 � • `\ (!` �4. � U •✓ 1'l1EI'hltlD I1Y NO. C �� 1's o �•,� Pre ` )Al I L ti 1 - 0 \ 3 -f � h�� nQ s�r�t .� si ceiy 7 SS c 10 12 13 15 16 ,7 18 19 20 21 22 •23 24 25 26 27 J 03 m A Cn w 0 m y 5 Z n -1 m 30 J 4= cc.(: SA 5�oneN�ge C_I; _1,75 100 V 6y ICw& a R6D 5-Z6-9z �r•iiiii®ice®®iii®iii®®ice Figure 5-1 TYPICAL FORM FOR STORM DRAINAGE SYSTEM PRELIMINARY DESIGN DATA (From: Wright -McLaughlin Engineers, 1969) LSC•WAI Fa 11J