Recycling Treated Municipal Wastewater for Industrial Water Use

Section 3
Inventory of Major WWTPs and Potential Industrial Reuse Demands
Table 3.14b. WWTPs in the Rainy River Watershed
Design Capacity, 2005 Ann Avg Flow as % of
Facility Name
mgd
Flow, mgd Design Capacity
NKASD WWTP 2.3 1.264 55.0%
Ely WWTP 1.5 0.688 45.9%
Total 3.8 1.952 51.4%
Source: MPCA, 2005
Industries and Proximity to WWTPs
The largest industry is located in International Falls and in close proximity (2.3 miles)
to the WWTP, as shown on Figure 3.14c. There are no industries in Ely that have their
own water permits.
Table 3.14c. Industries in the Rainy River Watershed
2004
Distance
to
Water WWTP, Closest
Industry Name Source* Use, mgd miles WWTP Industry Category
UNITED STATES STEEL CORP S 0.010 >10 Ely Mine Processing
S
Pulp and Paper
BOISE WHITE PAPER LLC
46.684 2.3 NKASD Processing
S
Pulp and Paper
KNAEBLE TIMBER INC
0.018 >10 NKASD Processing
Pulp and Paper
POTLATCH CORPORATION G 0.067 >10 Ely Processing
Sand and Gravel
SEPPI BROS CONCRETE
* G=Ground Water; S=Surface Water
Source: MDNR, 2004
S 0.136 >10 Ely Washing
Factors Influencing Potential for Industrial Reuse
Ground water supplies are limited in the central and eastern portions of the Rainy
River watershed. This area is Ground Water Area 3 and is dominated by glacial
aquifers that are commonly thin and limited in their extent and yield. The bedrock
aquifers also have limited yield; there are no large-scale regional aquifers. Ground
water movement in much of the area is difficult to define because of the fractured
nature of the bedrock. In the west (Area 4) and north (Area 5) portions of the
watershed, the ground water supply in the surficial aquifers are less shallow and have
moderate to good yields. This area can be dominated by connections to wetlands and
contamination of surface aquifers has occurred. However, overall this watershed has
a lowest to low susceptibility to contamination index, except along the southern
border and interspersed areas in the watershed.
3-30 Craddock Consulting Engineers
In Association with CDM & James Crook
WWReuseTM1_Sec 3_final.doc