HomeMy WebLinkAbout3-4_SUD_Ph3 Phasing Plan_2021-02-12
South University District Phase 3 Major Subdivision
Phasing Plan to Facilitate Written Concomitant Construction Approval
prepared for:
prepared by:
October 2020
South University District Phase 3 Major Subdivision Phasing Plan
Introduction
The intent of this proposed phasing plan is to establish a basis for a “concomitant construction”
approach permitting the simultaneous or near-to-simultaneous construction of various infrastructure
elements and off and on-site improvements within SUD Phase 3 and its Restricted Blocks 1-4. Herein we
identify key components of the South University District (SUD) Ph 3 Major Subdivision that would be
considered ‘Common Subdivision Improvements’ and are integral connections within the City of
Bozeman’s transportation and utility networks. These Common Subdivision Improvements would need
to be installed before any grant of occupancy could occur on any of the 4 ‘Restricted ’lots on Blocks 1-4.
If this Plan is approved, the City is being asked to provide a binding, written authorization for
“concomitant construction” and to permit a notice regarding said authorization on the SUD Phase 3
Final Plat.
Common Subdivision Improvements
Certain elements critical to the subdivision’s utility and transportation network have been identified,
with input from the City of Bozeman, that would be required to be installed by the property
developers—herein these are referred to as "Common Subdivision Improvements” and shown in yellow
on the enclosed “Infrastructure improvements Phasing Exhibit”. These Common Subdivision
Improvements generally include extending Stucky Road from South 19th Ave east to the round-about at
South 14th Ave, and widening South 19th Ave along the entire western project boundary between Kagy
Blvd and Arnold St. They also include installing storm drainage improvements within the Park 4 lot that
receives runoff from Stucky and 19th Ave. A specific list of the Common Subdivision Improvements
follows:
Widen S 19th Ave from Kagy Blvd to Arnold St
o install 10-ft wide asphalt sidewalk
o Pipe existing irrigation ditch
o Install irrigation and trees within boulevard
o Improve existing traffic signal at Stucky Rd and S 19th Ave
Stucky Road from 19th Ave to 14th Ave- 48-ft width
o Stucky Road sidewalks on both sides of City Park, and along north side of road between
17th Ave and 19th Ave
Stucky Road 12” water main between 19th Ave and 14th Ave
Stucky Road 8” sewer main (approximately 340 feet)
Stucky Road storm
o Approx. 100 ft of 18” storm main
o Approx. 340 ft of 24” storm main
o Approx 340 ft of 30” storm main
o Approx 190 ft of 36” storm main
o Approx 8 catch basins
o 5 storm manholes
Parkland Improvements
As mentioned previously, the 1.83-ac ‘City Park 4 ’lot will contain the stormwater detention pond that
accepts runoff from S 19th Ave, Stucky Rd, and S 17th Ave. The detention pond takes up 0.431 acres, but
the remaining 1.399 acres will be seeded, landscaped, and irrigated.
Miscellaneous Improvements
There is an existing irrigation easement on the property that will be relocated within a 20-ft easement
within the Park 3 and Park 4 lots. The existing shallow ditch will be piped in a new 15” PVC pipe along
the western edge of the Park 3 and Park 4 lots.
Blocks 1 & 2
Due to their proximity to each other and the initial ‘Common Subdivision Improvements ’the Block 1 & 2
Off-Site Improvements will both need to be constructed at the same time. Depending on the timing of
development, the first of these two Blocks to develop first will need to construct the developments for
both and create a payback district for the second developer.
Block 1 & 2 Off-Site Improvements
Block 1 & 2 Off Site Improvements proposed in this phasing plan and shown in blue on the enclosed
‘Infrastructure improvements Phasing Exhibit ’generally include extending 17th Ave between Stucky
Road and Kagy Blvd, and the segment of State Street from South 19th Ave east to South 17th Ave. They
also include installing storm drainage improvements within the four ‘Common Open Space ’lots (two on
Block 1 and two on Block 2) lot that receive runoff from 17th Ave and State Street. A specific list of the
Common Subdivision Improvements follows:
S 17th Ave from Stucky Rd to Kagy Blvd- 47-ft width
State St from S 19th Ave to S 17th Ave- 35-ft width
8” Water mains in State St and S 17th Ave
Connect to existing sanitary sewer main in Kagy Blvd
8” Sanitary Sewer mains in State St and S 17th Ave
Buried Stormwater retention basins (4) and associated mains
5’ concrete sidewalk along east side of S 17th Ave
10’ temporary asphalt sidewalk along Kagy Blvd between S 19th Ave and S 17th Ave
Parkland Improvements
Parkland requirements will be determined by the nature of the development(s) proposed within each of
the Blocks at the Site Plan level, but the South University District Property Owners Association (POA) will
require each block to develop a proportionate share of the remaining undeveloped 14.01-acre ‘City Park
3 ’lot. Block 1 will be required to develop 18.1% of Park 3, or 2.54 acres; Block 2 will be required to
develop 19.8% of Park 3, or 2.77 acres.
Miscellaneous
Development on either Block 1 or Block 2 will trigger the cash-in-lieu of Improvements (CILI)
requirements for the subdivision’s proportionate share of Kagy Blvd.
Block 3
The Block 3 Off-Site Improvements include the adjacent streets to the south and east, as well as the
portion of Arnold St along the south boundary of the ‘City Park 3 ’lot.
Block 3 Off-Site Improvements
Block 3 Off Site Improvements proposed in this phasing plan and shown in orange on the enclosed
‘Infrastructure improvements Phasing Exhibit ’generally include extending 17th Ave between Stucky
Road and Arnold St, and constructing Arnold St. from South 19th Ave east to South 14th Ave. A specific
list of the Common Subdivision Improvements follows:
S 17th Ave from Stucky Rd to Arnold St- 47-ft width
Arnold St from S 19th Ave to S 14th Ave- 35-ft width
8” Water mains in Arnold St and S 17th Ave
8” Sanitary Sewer mains in Arnold St and S 17th Ave
Stormwater catch basins and associated mains
6’-wide, 6” thick concrete sidewalk along park frontage on east side of S 17th Ave and north side
of Arnold St.
Parkland Improvements
Parkland requirements will be determined by the nature of the development(s) proposed within each of
the Blocks at the Site Plan level, but the South University District Property Owners Association (POA) will
require each block to develop a proportionate share of the remaining undeveloped 14.01-acre ‘City Park
3 ’lot. Block 3 will be required to develop 37.3% of Park 3, or 5.22 acres.
Miscellaneous
Depending on the timing of development of Block 3 and/or the property to the south of Arnold St, the
first to develop will likely need to construct both halves of Arnold St and create a payback district for the
second developer.
Block 4
The Block 4 Off-Site Improvements generally include constructing the segment of S 14th Ave adjacent to
the property. Depending on the timing of development, the first of these two Blocks to develop first will
need to construct the developments for both and create a payback district for the second developer.
Block 4 Off-Site Improvements
Block 4 Off Site Improvements proposed in this phasing plan and shown in green on the enclosed
‘Infrastructure improvements Phasing Exhibit ’generally include extending 14th Ave between Student Dr
and Arnold St, and the segment of Arnold Street from S 11th Ave east to S 14th Ave. A specific list of the
Common Subdivision Improvements follows:
S 14th Ave from Arnold St to Student Dr- 35-ft width
Arnold St from S 11th Ave to S 14th Ave- 35-ft width
8” Water mains in Arnold and S 14th Ave
8” Sanitary Sewer mains in Arnold St and S 14th Ave
Stormwater detention/retention basins and associated mains
Parkland Improvements
Parkland requirements will be determined by the nature of the development(s) proposed within each of
the Blocks at the Site Plan level, but the South University District Property Owners Association (POA) will
require each block to develop a proportionate share of the remaining undeveloped 14.01-acre ‘City Park
3 ’lot. Block 4 will be required to develop 24.7% of Park 3, or 3.46 acres.
Miscellaneous
Depending on the timing of development of Block 4 and/or the property to the south of Arnold St, the
first to develop will likely need to construct both halves of Arnold St and create a payback district for the
second developer.
South 11th Ave was constructed in 2018 and there is a payback district associated with that project
allocated to Block 4.
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