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River North, 105-acre Cowan Street corridor, Phase One: five 4-7 stories, 650 residences, 85 K sq. ft. retail, 50 K sq. ft. office, mile long riverfront park; Phase Two: two 12 story office buildings, pedestrian bridge across river


markhollin

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4 hours ago, markhollin said:

gravel and dirt--at least 15' higher; lots of infrastructure placement still underway. 

I developed some coastal properties when living in Florida, which required lots of fill. That was 15 years ago. I'm imagining how much fill dirt and gravel cost to raise, let's say 50 acres 15'.

(50 x 43,560 (cubic ft/acre) x 15') x .037 = 1,208,750 cubic yards. Figure 15 cubic yds/truckload = 80,586 truck loads (they're probably using barges, but I don't know). But one truck load would generally cost $400-600 + spreading. So, rough guess of +/- $50mm in fill dirt for 50 acres. Holy crap. :o

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1 hour ago, Flatrock said:

I developed some coastal properties when living in Florida, which required lots of fill. That was 15 years ago. I'm imagining how much fill dirt and gravel cost to raise, let's say 50 acres 15'.

(50 x 43,560 (cubic ft/acre) x 15') x .037 = 1,208,750 cubic yards. Figure 15 cubic yds/truckload = 80,586 truck loads (they're probably using barges, but I don't know). But one truck load would generally cost $400-600 + spreading. So, rough guess of +/- $50mm in fill dirt for 50 acres. Holy crap. :o

TDOT conservatively runs $15/yard all-in for unclassified borrow excavation (economy of scale). It's probably also not 15 feet across the entire site. I'd be more concerned about the permitting that allows it since almost that whole area is in the 100-year flood zone.

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1 hour ago, PruneTracy said:

TDOT conservatively runs $15/yard all-in for unclassified borrow excavation (economy of scale). It's probably also not 15 feet across the entire site. I'd be more concerned about the permitting that allows it since almost that whole area is in the 100-year flood zone.

Yep, that makes perfect sense - and thank you for all of that #PruneTracey ! Still a lot of money (& permitting)....not to mention other infrastructure. Wowzer.

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