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Home My WebLink AboutMONTAVA - PHASE D CORE AND IRRIGATION POND - BDR240006 - SUBMITTAL DOCUMENTS - ROUND 3 - Variance Request (3) 760 Whalers Way Bldg C, Suite 200 Fort Collins, CO 80525 970.226.0557 main 303.595.9103 metro 970.226.0204 fax ideas@tstinc.com www.tstinc.com July 17, 2024 Brad Buckman, P.E. City Engineer City of Fort Collins 281 North College Ave. Fort Collins, CO 80521 Re: Variance Request – 7.3.1.A. City of Fort Collins Classifications – 7-3F Montava Phase D TST Project No. 1230.0009.00 Dear Mr. Buckman: We are hereby requesting a variance to the Larimer County Urban Area Street Standards (LCUASS) for changes to the road geometry for Montava Phase D. Current standard of Table 7-3 in section 7.4.1 of the Larimer County Urban Area Street Standards (LCUASS), refers to road cross section geometry to be used in road design for the Fort Collins area. A variance is being requested to this section for use in the Montava Phase D project as noted below: -Table 7-3 Fort Collins (GMA and City Limits) Street Standards – Technical Design Criteria - Proposed road – Longwood Drive - The road is in the Northeast corner of the Montava Phase D site, at the intersection of Longwood Drive and Giddings Road (see attached exhibits). - The proposed street will vary as shown in the attached exhibits. Specific changes focus on the centerline tangent length. According to Table 7-3 the minimum centerline tangent length for a connector local residential is 100’, currently Longwood Dr has an interim tangent length of 67.5’ before beginning the centerline curve. We are requesting a variance to this standard to provide connectivity through the site until the ultimate design can be obtained. The ultimate design for the Longwood Dr and Giddings Rd intersection will include a roundabout which will satisfy any minimum tangent length requirements. This variance request for change in centerline tangent length: · is not expected to have a negative impact on capital, or maintenance cost requirements for the City, or property owners; · is not anticipated to reduce the life of the proposed roadways; and · is unlikely to be detrimental to the public health, safety/welfare, decreased sight distance, or have any effect on turning movements. Thank you for your consideration in the approval of this variance request for the minimum centerline tangent length for the Montava Phase D Giddings Rd/Lonwood Dr intersection. If you have any questions, or require additional information, please do not hesitate to contact me directly. Respectfully, TST, INC. CONSULTING ENGINEERS Derek Patterson, P.E. dpattersn@tstinc.com 970.484.2128 Table 7-3 Fort Collins GMA and City Limits Street Standards - Technical Design Criteria Design Element Arterial Collector Local Alley 4 or 6 lane 2 lane Major Minor Comm/Industrial Residential Overall Design Parameters Design Speed/ 50/40-45(6) 30/25 cannector Posted Speed 50/35-45(4 50/30-45 40/30-35 40/25-30 30/25 25/25 15 Stop in Si ht Distance 425 425 305 305 200' 200' 80 Horizontal Ali nment Minimum centerline radius 1075' 1075' 600' 600' 275' 275'connector 50' (with no super-elevation) 165' Maximum su er-elevation 0.04 ft/ft 0.04 ft/ft 0.04 ffJft NA NA NA NA Minimum tangent between curves or 200' 200' 150' 100' 100' 100' 20' at intersections' Vertical Ali nment Maximum Centerline Grade 5% 5°/o 6% 8% 8°/o 8% 8% Minimum Gutter Flowline Grade 0.5% 0.5°/o 0.5% 0.5% 0.5% 0.5% 0.5% Minimum Crest 84 84 44 44 19 19 connector 3 K-values for Vertical 12 all others Curves Sag 96 96 64 64 37 37 connector 10 26 all others Intersection Desi n Minimum sight distance at driveways 1030' 1030' 660' 660' 310' 260' 210' and intersections Without Witn Without With Access Management Raised Raised Raised Raised Median Median Median Median Distance Si nalized 2640'SMin. 2640'SMin. NA NA NA NA NA between 460'— 460'— 460'— 460'— intersections2 Unsignalized 660'S 660'S 660'S 660'S 330'Min. 250'Min. 200'Min. 200'Min. NA 1320's 660'6 1320'6 660's Min. Min. Min. Min. Distance between high volume 460'— 460'— 460'— driveways and intersectionsZ 660'S 660'S 660'S 330' 200'Min. 175'Min. 175'Min. 150'Min. NA 1320'� 660'6 1320'6 Min. Min. Min. Min. Distance between driveway edges 460'— 460'— 460'— 330' 75'Min. 30'Min. 30'Min. 12'Min. No Iimit 660'S 660'S 660'S Min. 660'6 660'6 660'6 Min. Min. Min. Corner clearance between 460'—660'S 460'—660'S 175'Min. 100'Min. 175'Min. 50'Min. 40'Min. driveways/alleys&street intersectionsZ Drivewa approach street confi .3 Radial curb return Radial curb return Curb cut 4 Curb cut 4 Curb cut 4 Curb cut' Curb cut' 1 Intersection tangents are measured from flowline of the intersected street at intersections.Note:Two curves in the same direction must be separated by a tangent at least two times the minimum tangent lengths shown in Table 7-3 and Table 7-4. 2 These distances are measured as shown in Figure 9-1. 3 Table indicates residential driveways.All commercial driveways shall be constructed with radial curb returns(see Section 9.3.2). 4 Radial curb returns are also allowed where traffic volumes meet the requirements for a High Volume Driveway. 5 For a distance less than 460'an administrative variance must be approved by the Local Entity Engineer;for a distance greater than 660'a modification in accordance with the Land Use Code will be required. 6 Minimum spacing for full movement and/or potentially signalized intersections Page 7-8 Larimer County Urban Area Street Standards—Repealed and Reenacted August 1, 2021 Adopted by Larimer County,City of Loveland,City of Fort Col�ins LONGWOOD DR TANGENT VARIANCE � � � � o � � � � � . �>. � ;oo.00� TANGENT I :' .: 67.54' R275� — — � �N�V�100� �R � i / >. `.:. � � � � � I � � � I I Z 0 � � c� � � � � I � � I � � � I � I z I $ I I � � $ N � � � � � � MONTAVA PHASE D � DATE: JULY 17, 2024 � JOB N0. 1230.0009.00 o SHEET 1 OF 1 g TST, INC.CONSULTING ENGINEERS $ 50 25 0 50 � � -:'tv�': �?' scale 1"=50' feet �4a whaie.�way, s�ne zoo Fort Coilina, Colorado jy Phone: 970.226.0557