HomeMy WebLinkAboutMONTAVA - PHASE D CORE AND IRRIGATION POND - BDR240006 - SUBMITTAL DOCUMENTS - ROUND 2 - Variance Request (2)TST
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TST, INC. CONSULTING ENGINEERS
May 01, 2024
Brad Buckman, P.E.
City Engineer
City of Fort Collins
281 North College Ave.
Fort Collins, CO 80521
Re: Variance Request — 7.4.1 Alignment — Table 7-3
Montava Phase D
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 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 — The intersection of Mountain Willow Way and Goodheart
Drive.
- The proposed Mountain Willow Way terminates to the south at
a T-Intersection with Goodheart Drive (Goodheart Drive station
15+36) and does not meet the City criteria of a minimum
tangent length at the intersection prior to a curve. Specifically,
Table 7-3 requires a 100' minimum tangent between curves or
at an intersection. The requested variance to these criteria is
the only intersection in the Montava Phase D site where the
required tangent prior to a curve is not met.
748 Whalers Way
Suite 200
Fort Collins, CO 80525
970.226.0557 main
970.226.0204fax
ideas@tstinc.com
www.tstinc.com
We are requesting a variance to this standard to maintain in an effort to
maintain the overall future site layout / tract sizes that has been planned for
future developmet.
This variance request for change in minimum 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 tangent length for Mountain Willow Way. 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(a�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
CENTERLINE TANGENT VARIANCE
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MONTAVA PHASE D
DATE: MAY 01, 2024
JOB N0. 1230.0009.00
SHEET 1 OF 1
TST, INc. CONsu�riN� EN�iNEERs
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