Encyclopedia of Environmental Science and Engineering, Volume I and II

1190 URBAN RUNOFF

TA B L E 1 0

Summary of basin storage costs (ENR 
 5,000)

Location

Storage capacity

(Mgal)

Drainage area

(acres) Capital cost ($)

Storage cost

($/gal) Cost per acre

Annual O&M

cost ($/year)

Akron, OH (1) 1.1 188.5 1,139,000 1.04 6,100 7,200

Milwaukee, WI

Humboldt Ave.

3.9 570 4,435,000 1.14 7,800 127,000

Boston, MA

Cottage Farm Detection

and Chlorination Station

1.3 15,600 16,237,000 12.49 1,000 203,000

Charles River Marginal

Conduit Project (2)

1.2 3,000 23,725,000 19.77 8,000 246,000

New York, NY

Spring Creek Auxiliary

Plant Pollution Control Plant

Storage 12.39 3,620 29,838,000 2.40 9,100 251,000

Sewer 13.00 — — — — —

Total 25.39 3,620.00 29,838,000 1.18 9,100 251,000

Chippewa Falls, WI 2.82 90 1,868,000 0.65 21,000 7,000

Storage Treatment — — 427,000 — 5,400 20,000

Total 2.82 90 2,295,000 — — —

Chicago, IL (3) — — — — — —

Phase I Tunnels under

Construction or Completed,

and Pumping Stations

1,016 — 1,676,040,000 1.65 — —

Phase I Tunnels Remaining 1,033 — 1,556,973,000 1.54 — —

Phase I Subtotal 2,049 240,000 1,958,460,000 0.05 — 14,973,000

Phases I and II Total 44,374 240,000 5,191,473,000 1.17 21,800 26,770,000

Sandusky, OH (4) 0.36 14.86 1,303,590 3.61 87,500 15,500

Washington, D.C. (5) 0.20 30.0 2,172,650 11.02 73,600 8,400

Columbus, OH (6)

Whittier Street

3.75 29,250 15,353,420 4.10 500 —

Cambridge, MD (7) 0.25 20 769,640 3.20 46,600 36,000

† Estimated values.

‡ Estimated area.

(1) EPA-600/2-76-272 (media-void space storage).

(2) Environmental assessment statement for Charles River Marginal Conduit Project in the cities of Boston and Cambridge: Commonwealth of Massachusetts,

Metropolitan District Commissions, September 1974.

(3) The Metropolitan Sanitary District of Greater Chicago: personal communication from Mr. Forrest Neil, chief engineer, September 1981.

(3a) Actual award TARP Status Report: July 1, 1981.

(3b) Estimate as for January 1, 1981, TARP Status Report July 1, 1981.

(3c) TARP Phase II estimate as of July 31, 1981.

(3d) Estimate.

(4) EPA 11022ECV09/71 (underwater).

(5) EPA 11020DWF12/69 (underwater).

(6) EPA-600/2-77-064; EPA 11020FAL03/71.

(7) EPA 11022DPP10/70 (underwater).

(EPA-600/8-77-014).

4 PHYSICAL (WITH/WITHOUT) CHEMICAL

TREATMENT

Physical-chemical processes are of particular importance

in CSO treatment because of their adaptability to automatic

operation (including almost instantaneous startup and shut-

down), excellent resistance to shockloads, and ability to

consistently produce a low SS effluent. In this discussion,

physical-chemical systems will be limited to screening, fil-

tration, chemical clarification, and dissolved air flotation.

C021_002_r03.indd 1190C021_002_r03.indd 1190 11/23/2005 9:45:46 AM11/23/2005 9: