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HomeMy WebLinkAbout022.01 - Appendix T.1 Access Modification RequestMarch 13, 2023 Simon Lindley City of Bozeman Engineering Department P.O. Box 1230 Bozeman, MT 59771-1230 Re: South Range Crossing Preliminary Plat (Revision 1) – Access Modification Requests COB #22390 Dear Mr. Lindley: The following letter is intended to address the comment received in the ProjectDox discussion board for the Preliminary Plat submittal regarding access spacing and centerline radii (see excerpt below). Upon further review of the South Range project the engineering department has two more code requirements to add to the preliminary plat and master site plan applications. I've added the unresolved comments to the master site plan application as comment 15 and 16 since that application is currently in review but the comment will need to be resolved in both applications prior to reaching adequacy. The first comment is in regard to access spacing on local streets. It appears four accesses on Canter Avenue and four accesses on Street A may not meet the minimum requirement of 40 feet. The applicant must request an access modification request following the criteria in BMC 38.400.090.H for the Director of Transportation and Engineering to approve. The second comment is in regard to the centerline radius at the corner of Alder Creek Drive and Street B. This curve does not meet the DSSP minimum engineering standard of 150 feet listed in table IV-2 for a local street centerline radius. The applicant must request a modification from this standard for the Director of Transportation and Engineering to approve. The Engineering Department will need to see an analysis showing how a fire truck could make the turn with full street parking in this area. Modification request for Access Spacing (BMC 38.400.090.H) We are requesting an access modification to BMC item 38.400.090.H regarding the use of shared approaches to Canter Avenue and Providence Drive (previously Street A). The maximum number of dwelling units that exist within the Build-to-rent product is 16. These units function as patio homes per the Trip Generation Manual (11th edition) Land Use Code 210, which have a 5.35/unit average weekday rate and a 0.47/unit average evening peak hour rate. This gives an expected trip generation for the largest module of 86 weekday trips and 8 evening peak hour trips. The current configuration of the units provides the most efficient design without jeopardizing the public’s health, safety, and welfare. The accesses are located onto local streets, and the shared paths are not expected to have sufficient traffic as described above, which should not endanger the public. Therefore, we are requesting that the City of Bozeman approve a modification for all those shared access proposed which do not meet this spacing standard. N:\5659\011 -YTI Development\04 Design\Agency Submittal\3_PreliminaryPlat- RTC_20230314\Documents\SRX_AccessModReq_202303.dotx Page 2 of 2 Modification request for Centerline Radius (Bozeman Design Standards Table IV-2) We are requesting a modification from the centerline radius or a local road standard for Richland Drive (formerly Street B) as shown in Table IV-2 of the City of Bozeman Design Standards and Specifications Policy (dated March 2004). The curve at approximately Station 2+86 is intended to function as 90-degree corner and shall not function as a standard local road with a larger design speed for navigational purposes, therefore it shall not require a large centerline radius. This 90-degree configuration provides the most efficient use of land without endangering public health, safety, and welfare. A slower traffic movement will be preferable for this area as it is near two intersections with local roads and additional proposed alley accesses. A turning movement exhibit was provided for a City of Bozeman Fire Truck (SPH100 Aerial specifications) to show that the vehicle can safely navigate this corner (see attachments). Furthermore, Richland Drive shall have stop control at the intersection with Canter Avenue and at the intersection with Brookdale Drive. This route is not expected to carry much traffic other than local traffic due to its configuration. Therefore, we are requesting that the City of Bozeman approve a modification for the centerline radius of Richland Drive at this corner. Conclusion Thank you for your consideration. Please feel free to contact me with any questions at 406-922- 6734 or lhageman@m-m.net. Sincerely, ______________________________ Lee Hageman, P.E. Land Development Engineer cc: MMI File 5659.011 BPBPS D D D D D D SSSSSSSSSSSSSS S S S S S S SS 8001874987.197CS 16014604983.863CS 16014744980.544CS 16014144996.248CS16014154996.781BO 8015624983.833CS 8015634983.677BO 5368709144983.833CS 5368709154983.677BO 8017665001.401WV 8017675001.395WV 16014154996.781BO S700024991.746MHS-CL CO8003454980.389CO CO8003464982.113CO S8014435002.544MHS CO8015654970.969COCO5368709164970.969CO S S DD S S SD SD SDSSD SD SD D D SSSSSSSSSS WW W W W W W W W WWWWWWWWWWWS S S S S S S S SSSSSSSSSSW W W T W LEASINGOFFICE ALDER C R E E K SUBDI V I S I O N P H - 5 PB J-4 7 9 OPEN S P A C E ALDER C R E E K SUBD I V I S I O N P H - 5 PB J- 4 7 9 LOT 7 BLOCK 1 4 ALDE R C R E E K SUBD I V I S I O N P H- 5 PB J-4 7 9 BROOKDALE DR ALDER CREEK DRRICHLAND DRCANTER AVE.PROVIDENCE DRSOUTHBRIDGE DR MINO R S U B 235 ALLIS O N SUBDI V I S I O N COS 7 9 2 BLACKWOOD GROVES SUBDIVISION PB J-417 LOT A MINO R S U B 2 3 5 A LOT 3 BLOCK 1 MINOR S U B 4 9 4 LOT 1 BLOCK 1 MINOR S U B 4 9 4 LOT 4 BLOC K 1 MINO R S U B 4 9 4 LOT 3 MINOR S U B 2 3 5 A LOT 1 BLOC K 4 SOUT H B R I D G E SUBD I V I S I O N PHAS E 1 PB J-5 0 7 LOT 1 BLOC K 5 SOUTH B R I D G E SUBD I V I S I O N PHASE 1 PB J-5 0 7 PUBL I C P A R K SOUT H B R I D G E SUBDI V I S I O N PHASE 1 PB J-5 0 7 O.S. F BLACKWOOD GROVES SUBDIVISION PHASE 9 PB. J-714SOUTH 19TH AVE.120' R.O.W.(LANDSCAPED BLOCK FRONTAGE)CAMBRIDGE DRIVE 60' R.O.W. (LANDSCAPED BLOCK FRONTAGE) WEST GRAF ST. 90' R.O.W. (LANDSCAPED BLOCK FRONTAGE)SOUTH 15TH AVE.60' R.O.W.(LANDSCAPED BLOCK FRONTAGE)CANTER AVE.Copy of COB - SPH100 AERIAL 236" Copy of COB - SPH100 AERIAL 236" FIGURE NUMBER © PROJECT NO.DRAWN BY: DSGN. BY: APPR. BY: DATE: COPYRIGHT MORRISON-MAIERLE,2023 Plotted by lee hageman on Mar/13/2023 engineers surveyors planners scientists MorrisonMaierle 2880 Technology Blvd West Bozeman, MT 59718 406.587.0721 www.m-m.net N:\5659\011 -YTI Development\ACAD\Exhibits\EmergencyVehicleMovements\5659.011_EmergencyVehicle_RichlandDr.dwg5659.011 EX. 1 SOUTH RANGE CROSSING SUBDIVISION BOZEMAN MONTANA EMERGENCY VEHICLE TURNING EXHIBIT FOR RICHLAND DR LRH LRH LRH 3/13/2023 100 200501000 SCALE IN FEET 20 4010200 SCALE IN FEET 1 - VICINITY MAP SCALE: 1" = 100' 2 - EMERGENCY VEHICLE TURNING DETAIL SCALE: 1" = 20' FIRE TRUCK TURNING EXHIBIT WESTBOUND FIRE TRUCK TURNING MOVEMENT SOUTHBOUND FIRE TRUCK TURNING MOVEMENT SEE DETAIL 2 THIS SHEET NO PARKING AREAS DUE TO VISION TRIANGLES ON-STREET PARKING 8' FROM FACE OF CURB VISION TRIANGLE (TYP.)CANTER AVE.RICHLAND DRRICHLAND DR WHEEL PATH (TYP.) BODY PATH (TYP.)