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January 12, 2024
Sanderson Stewart Project No. BOZ-07022.01
SITE PLA N APPLICATION #22176
MAIN STREET HOTEL
BOZEMAN, MONTANA
FORMAL DEPARTURE REQUESTS
1. 38.410.070.B.2 Service Length – DEPARTURE
Our team requests a departure from the UDC’s maximum service line length from the water
main to the structure. We are proposing to connect to the existing 8-inch water main in 5th
Avenue to service the proposed building. The mechanical room is on the west side of the
building, but we are taking the shortest path possible to connect to an existing 8-inch water
main with adequate capacity. The mechanical room shares a wall with the proposed indoor
pool and other mechanical/hvac equipment necessary to operate the pool and building utilities,
so it is in an ideal location from an interior building perspective. The proposed fire and
domestic water service lines run parallel to each other from 5th Avenue to the point of
connection into the building along the west building elevation.
The total service length for the fire and domestic water service lines are 315-feet and 318-feet,
respectively. The pressure provided at the 8-inch water main connection in 5th Avenue, at 1,500
gpm, is approximately 112 psi. The pressure loss through the approximately 315-feet of new 6-
inch fire service is approximately 22 psi, resulting in an expected pressure available at the
proposed hotel of 90 psi. The pressure provided at the 8-inch water main connection in 5th
Avenue, at 39.33 gpm, is approximately 112 psi. The pressure loss through the approximately
318-feet of new 4-inch domestic service is approximately 1 psi, resulting in an expected
pressure available at the proposed hotel of 111 psi. As proposed, from a hydraulic capacity
standpoint, the expected pressure at the building is adequate to service the fire and domestic
water service lines.
Reference the Water and Sewer Design Report for the Main Street Hotel for additional
information.
2. 38.400.100 Street Vision Triangle – DEPARTURE
Reference attached memorandum
MEMORANDUM
To: Cody Flammond, City of Bozeman Engineering
From: Joey Staszcuk, PE, PTOE, RSP1, Senior Transportation Engineer
Date: 1/9/2024
Reference: BOZ-07022.01, Main Street Hotel
The purpose of this memo is to address the City of Bozeman comments provided by the
Engineering Department that require further information for the Main Street Hotel
Development. Specifically, this memo will address the transportation comments provided in
the City’s correspondence regarding the intersection sight distances of the Main Street Hotel
Development.
Adjacent to the site development, West Main Street is classified by the City of Bozeman as a
Principal Arterial with a 25-mph speed limit, West Mendenhall Street is classified as a minor
arterial with a 25-mph speed limit, and North 5th Avenue is classified as a local street with a
25-mph speed limit. West Main Street has two travel lanes in each direction, West Mendenhall
Street has two westbound travel lanes, and North 5th Avenue has one travel lane in each
direction. On-street parallel parking is available on all roadways.
The City of Bozeman Uniform Development Code (UDC) 38.400.100.B outlines the required
street vision triangle distances for arterial streets with a traffic control signal, as West Main
Street is classified adjacent to the site, to be 40 feet along each curbline. UDC 38.400.100.E
notes that a deviation from standards may be granted by a review authority for intersections
with traffic signals or on streets classified as urban routes by MDT.
Per the plan for the Main Street Hotel Development, the position of the building façade at the
West Main Street & North 5th Avenue intersection is noted to be at least 14 feet from the
curb to the south and to the east, which allows for a street vision triangle distance of 28.1 feet,
falling short of the 40-foot minimum street vision triangle distance per the City of Bozeman
UDC. A deviation is requested per the UDC, Section 38.400.100.E, for the proposed street
vision triangle distance at the West Main Street & North 5th Avenue intersection.
Based on direction from the City of Bozeman Engineering, Intersection Sight Distance (ISD) was
evaluated at the intersection location using criteria from AASHTO’s A Policy on Geometric Design
of Highways and Streets, Chapter 9.5.3.3. For vehicles departing the West Main Street & North
5th Avenue intersection, sight distance requirements are that the first vehicle stopped on an
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approach is visible to the driver of the first vehicle stopped on all other approaches.
Additionally, for left-turning vehicles, it is required that there is sufficient sight distance to select
gaps in oncoming traffic and complete left turns. AASHTO’s criteria provides a 9-foot curbline
distance, compared to the 40-foot curbline distance required by the UDC 38.400.100.B. There
do not appear to be any vision restrictions within the AASHTO sight triangles.
The AASHTO criteria would be consistent with sight distance provided at other signalized
intersections along Main Street in downtown Bozeman, where there are currently buildings
within the 40-foot curbline distance. Therefore, it is recommended that the Main Street Hotel
Development Street Vision Triangle deviation request to utilize AASHTO criteria be approved.
The AASHTO ISD criteria are not anticipated to impact the health, safety or welfare of the
public. Please feel free to contact me if you have any questions.
UDC Street Vision TriangleLEGENDAvailable Street Vision TriangleAASHTO Street Vision TriangleAASHTO ISD