1601 Mariposa Update

Workers will be digging trenches for building footings between 2/12/18 and 4/30/18. This will generate approximately 3000 cubic yards of lead-contaminated soil, with approximately 150 trucks entering and exiting the site on 18th Street to off-haul the soil.

Required safety measures include:
• Controlling dust by spraying water on exposed soil
• Cleaning trucks and wheels of soil and mud before leaving site
• Following specific transportation routes
• Stopping excavation when it's windy
• Washing streets and sidewalks regularly

Note that you always can contact Nick Vanderboom, Senior VP of Related (phone: 415-653-3162 / 213-300-1786, email: NVanderboom@Related.com) and/or Tom Lanphar from DTSC (phone: 510-540-3776, email:  tom.Lanphar@dtsc.ca.gov)  with any immediate concerns.

1601 Mariposa Statistics at a Glance

Number of Residential Units: 320 Rentals

            191 Studios and one-bedrooms (60% of total)

            119 Two-bedrooms

            10 Three-bedrooms

Total Square Feet (residential, commercial, parking) 400,000

Size of Site: 3.35 acres

Open Space: 34,061 sf (less than minimum 25%), only 62% publicly accessible.

Height: 40 feet at street, up to 5 stories lower on slope

Total Residents: approximately 700

Additional Parking Demand: 465 places

Parking Places on Site: 275

Traffic – Additional Daily Person Trips: 4249 (auto 2478)

Exceptions Sought

Rear Yard (less than required 25%, mid-block passage not permitted by ENP)

Exposure (aprox. 58 units do not face onto an adequate open area)

Frontage (less that required 17’ height in commercial space)

Horizontal Mass (inadequate separations at Arkansas and 18th Streets)

Mid-Block Alley (no publically accessible mid-block alley on Arkansas)

 

Neighborhood Context – By the Numbers

Total Units:

            1601 Mariposa – 320 units

The Potrero (over Whole Foods) – 164 units

Victoria Mews – 94 units

18th & Arkansas – 63 units

Units/Acre:

            1601 Mariposa – 96

            Victoria Mews – 47

            Average for Potrero Hill – 27

Population/Acre:          

         1601 Mariposa – 205 (687 residents on 3.35 acres

         Average for Potrero Hill – 56.7 (2.1 average household x 27

Population Increase:

          5% population increase on .3% of land

Commercial Space:

           The Potrero – 46,000 sq. feet (Whole Foods)

1601 Mariposa - 9000 sq. feet (equivalent of 20% of Whole Foods)