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Home My WebLink AboutTHE MARK - FDP240013 - SUBMITTAL DOCUMENTS - ROUND 1 - Variance Request 301 N Howes Street Suite 100 Ft Collins, CO 80521 | (970) 221-4158 | epsgroupinc.com 1 of 2 July 30, 2024 Sophie Buckingham Engineering Development Review City of Fort Collins 281 N. College Avenue Fort Collins, CO 80524 Project # 24-0409 The Mark PDR240006 – Modified Corner Ramp Variance Description: This is a request for variance to the standard pedestrian ramp details required at four-way intersections per LCUASS section 16.3.1-A.1. Variance to this Standard will allow for a “depressed corner” ramp to be installed at the southwest corner of Johnson Drive and Spring Court. Technical Design Criteria: LCUASS section 16.3.1-A.1 states, “Access ramps shall be included at all intersection comers. Access ramps shall be constructed in accordance with Construction Drawings 1603 through 1607.” Identifying the issue: This project was approved by the City of Fort Collins on 02/25/2020 under the name of “Utility Plans for Johnson Drive Apartments”. There is another variance attached to this project for the street section of both adjacent public streets. Both this variance along with the “Modified Street Section” variance were approved with the previous plans. All of the street improvements up to the curb and gutter for both Spring Ct and Johnson Dr along with the foundation of the building have been installed. In the modified street section variance, the tree lawn width is proposed to be thinner than required (6’ rather than the required 8.5’ from flowline to edge of walk). This constraint matched with the design of the stairs and retaining wall behind the sidewalk does not provide enough room vertically and horizontally for directional ramps to be designed and constructed per LCUASS detail 1606a. Justification for Modified Corner Ramp Project Partially Constructed  Mentioned in the “Identifying the Issue” section, this project was approved some time ago and was in the middle of construction before it came to a screeching halt. Because the previously approved plans have expired, the City is requiring another entitlements process before construction can begin. The existing Right-of-Way for both streets was approved previously. It is not possible to add anymore.  With the curb and gutter at the southwest corner of the Spring Ct/Johnson Dr already installed and the building foundation already in place, the vertical difference between flowline and the finished floor elevation is already set leaving no room for revisions to the previously approved corner ramp design along with the stairs and retaining walls that would be affected. 301 N Howes Street Suite 100 Ft Collins, CO 80521 | (970) 221-4158 | epsgroupinc.com 2 of 2 CDOT Approved Ramp Style  The “depressed corner” style of ADA compliant pedestrian ramps are used commonly in highly dense commercial and urban areas where the building is close to the Right-of-Way. CDOT details this style of ramp in their standard detail M-608-1 sheet 7 labeled as “blended transition”. This ramp style provides ADA compliance for intersection corners with minimal room to gain elevation in the ramp portion while still providing an adequate landing. This landing is typically bigger than the required 4’x4’ landing at the top of a directional. This landing size is important for people leaving and entering the building via stairs that abut the back. The detail does call out for a 6’ minimum walk width. The project is providing a 6’ walk both on Spring Ct and Johnson Dr. CDOT including this specific ramp type in their standards and typically having a stricter code regarding ADA compliance is enough to conclude that it will be adequate for this project. Conclusion We do not feel that this variance will increase risks to public health, safety, or welfare, nor will it reduce the design life of any public pedestrian access routes or cause the City of Fort Collins additional maintenance costs. This pedestrian ramp will allow for ADA compliance and access to the building and the adjacent sidewalks proposed with the project. We believe this modified corner ramp will be a benefit to the public welfare by providing larger pedestrian spaces through the increased sidewalks widths. We look forward to continuing to work with the City on solutions that provide a multitude of benefits. Please call if you have any questions. Sincerely, Cody Pape, P.E. Project Engineer �l� O � A� � � � � CURB&GUiiER CURB&GUTTER 9 GRADE BREAK IO g (BLENDED TRANSITION ONLY) B A �� 11 II BLENDED TRANSITION DEPRESSED CORNER ruRNrNc sPncE 6, 6„ CONCRETE SIDEWALK CURB RAMP NAR[ES) FL T0 � SIDEWALK TO F� VARIES VARIES 8�� 1OP OF 8 DEZEMTABLE � PAVEMENT � Z�MIN. 4'MIN. TURNING SPACE M1O OO 8O wnarv[N` SURFAC.. TOP OF 5%MAH. 2%MAX. SIDEWALK 5% 8.3�' 2�TYP� `'� PAVEMENT � DETECTABLE WARNING SURFACE .. • / / / / 5%MAX. M`X. (DWS) �/��/��/��/ coNCRerE 4�, BLENDED TRANSITION & DEPRESSED CORNER NOTES GUTTCR SLOPE DETECTABLE SI�EWALK GUTTER WFlRNING 1 PERPEN�[CULAR AND PARALLEL RAMP CONFIGURAT[ONS ARE PREFFERE�.BLENDED TRANSITIONS AND DEPRESSED 5%MAX. fi" SURFACE 6" GRA�E BREAK O GRADE BREAK GRADE BREAK CORNERS SHOULD ONLY BE USE�WHERE SfTE CONDITI�NS MAKE THEM A MORE APPROPRIATE OPTION,OR WHERE PERPENDICULAR OR PARALLEL RAMPS CANNOT BE INSTALLED DUE TO A PHYSICAL SITE CONSTRAINi. SECTION A—A SECTION B—B O RAMP W[DTH-PROVIDE 5 fT.OR GREATER WHERE POSSIBLE IF SITE CONSTRNNTS�0 NOT PERMIT,PROVIDE 4FT.WID1H MINIMUM.RAMPS SERNCING SHARE�USE PATHS SNALL MATCH iHE WIDTH OF THE PATH. E�O3 RAMP RUNNING S�OPE-8.3%MAX. � O4 BLENDE�TRANSITION RUNNMG SLOPE-5.0%MA%. —{4'MIN. CROSSWALK BAR �'�— O5 RAMP AND TURNING SPACE CR�SS SLOPE-20%TYPICAL AT CROSSMGS WITHOUT YIELD�R STOP CONTROL, (TYPICAL) OR WITH A SIGNAL WHERE VEHICLES CAN PROCEE�iHROl1GH THE INTERSECTION WITHOUT SLOWING OR O STOPPING,THE CROSS SLOPE OF RAMPS AN�TURNING SPACES MAY E�UAL THE HIGHWAY GRADE. � PEDESTRIAN CURB OR � VERTICAL OBSTRUCTIDN 6O Tl1RNING SPACE�IMENSIONS-PROVIDE A 4 FT.X 4 FT.MIN.TURNING SPACE AT THE BOTTOM OF RAMP � RUNS.THE TURNING SPACE MAY CONTAIN THE DETECTABLE WARNING SURFACES. � O RAMP ALIGNMENT-TURNING SPACE SHALL BE ALIGNED TO BE FULLY CONTAINED WITHIN THE CROSSWALK 4'MIN. OR STREFT CftOSSING(S)THEY SERVE. �� 4'MIN. E�� OB RAMP LENGTH- RAMP LENGTH IS DEPENDENT UPON THE RAMP SLOPE AND THE CHANGE OF ELEVATION FROM iHE TURNING SPACE i0 iHE SIDEWALK.WHERE 1ERRAIN IS SLOPING A RAMP IS NOT REQUIRE�TO CHASE GRADE MORE THAN 15 FT.REGARDLESS OF THE RESULTING RAMP SLOPE. �9 RAMP FLARES-WHERE A RAMP EDGE ABl1TS A WALKABLE Sl1RFACE,A FLARED SIDE MUST BE PROVIDED.RAMP FLARE SLOPES SHALL NOT EXCEED 10.0%. 4'MIN. 10 VERTICAL CURB RETURNS-VERTICAL CURB RETURNS MAY BE USED ONLY WHERE A RAMP ABUTS A — — NON-WALNABLE Sl1RfACE,OR WHERE A RAMP IS PROTECTE�FROM PEDESTRIAN CROSS TRAFFIC(FOR EXAMPLE BY A SIGNAL CABINET OR UTILITY POLE WHICH BL�CKS PASSAGE). BLENDED TRANSITION DEPRESSED CORNER 11 cuTrEe couNrER s�oaE-s.oz Mnu. TYPE 5 - DEPRESSED CORNER/BLENDED TRANSITION 'Z eWENo o�iRnNsirraNWnNo"oEPREssEOAco°aNER°RnMPSE RAOTus w.o�ocnrEo nr rHE encK oF cuRa oN Com uter File Information Sheet Revisions Colorado Department of Transportation STANDARD PLAN NO. Creation Date: 07/31/t9 Date: Comments 282g West Howard Place �T T� ��/rn� �esigner Initiols: JBK R-X ��CDOT HQ,3rd Floor V 1Vlr � M-608-1 Lost Modificotion Dote: 07/31/19 R-X '� Denver,CO 80204 Sta]]u$Td S110et NO. 7 Ol 1 Q Detailer Initials: LTA � `�� Phone:303-757-9021 FAX:303-757-9868 CAD Ver.:MlcroStation V8 Scole:Not to Scole Units: English R-X Projeet Development Braneh JBK Issued by the Project Development Branch:July 31,2019 Project Sheet Number.