Point Sources

Point sources data for the Columbia and Willamette Rivers were collected from the Discharge Monitoring Reports (DMR) provided by Oregon Department of Environmental Quality (DEQ) and Washington Department of Ecology (WADOE). The Clean Water Act requires that any discharge “pollutants” through a point source into a water body in the United States shouldhave a National Pollution Discharge Elimination System (NPDES) permit.The NPDES permit may define minimum or maximum limits of discharge constituents and may require periodic monitoring and reporting of the discharge.This reporting is submitted to the local branches of the EPA (Permit Compliance System) and DEQ/WADOE in the form of a Discharge Monitoring Report (DMR).

Oregon

The 1995 QUAL2E model employed in Tetra Tech Inc.'s Willamette River Basin Water Quality Study utilized steady state point source inputs. This differs from the CE-QUAL-W2 Version 3 model, which allows for dynamic point source inputs.This dynamic ability is a significant improvement when considering point sources can have high variability in discharge rates and constituents that are not seasonally related. The QUAL2E model used the point sources shown in Table 12 for the Lower Willamette River. The flow and water quality constituents were derived from the DMRs.

Table 12.Tetra Tech Phase II Point Source Inputs

Several of these point sources have changed ownership or name or have stopped discharging since 1995 when Tetra Tech collected the data.Table 13 shows a list of facilities which have changed their name or ownership.

1995 Facility Name	Current Facility Name
Port of Portland #2	Kinder Morgan Bulk Terminals, Inc.
Port of Portland #1	Cascade General, Inc.
Elf Autochemical	Atofina Chemicals
Simpson Paper Co.	West Linn Paper Co.
Smurfit Newsprint Corp.	Blue Heron Paper Co.
JR Lawrence	Forest Park Mobile Village
GS Gradow	Canby Regency Mobile Home Park

Table 13.1995 vs. Current Point Source Designations

In the case of Union oil, Chevron USA, Lone Star NW, Ross Island Sand & Gravel, and Caffall Bros. (Table 12), no quantitative discharge data were available in order to characterize discharge flows or water quality.The Tetra Tech point source labeled Chiloquin is an error.The City of Chiloquin in located in Kalamath County in Southern Oregon on the Williamson River, RM 11.5.

Table 14 identifies the point sources to the Willamette and Columbia Rivers from Oregon that were used in the CE-QUAL-W2 model. Most of the point sources from the Tetra Tech work were included, except the following: Kinder Morgan (Port of Portland #2); Koppers Industries, Inc; Linnton Plywood Association; and Ash Grove Cement Co. because their flows were either zero or negligible.Additional dischargers to the Willamette River that were considered "major" dischargers by DEQ and that had discharge data were also considered.In some cases a company had more than one discharge on the same property or more than one property with a discharge.The locations of these point sources are shown in Figure 61.Data from the point sources was found to be limited.Many water quality constituents, such as nutrients, were not monitored in the point sources.Data was collected on a monthly basis or less frequent.

Model Seg.	Outfall ID	Facility Name	Receiving Water	River Mile
3	13691/A	CANBY STP	Willamette	33.0
4	97612/B	CANBY REGENCY MOBILE HOME PARK	Willamette	31.6
8	21489/C-001	WEST LINN PAPER COMPANY	Willamette	27.7
8	72634/B-001	BLUE HERON PAPER COMPANY	Willamette	27.5
8	30554/B	FOREST PARK MOBILE VILLAGE	Willamette	28.2
11	72634/B-002	BLUE HERON PAPER COMPANY	Willamette	27.5
11	72634/B-003	BLUE HERON PAPER COMPANY	Willamette	27.5
11	21489/C-002	WEST LINN PAPER COMPANY	Willamette	27.7
15	89700/A	TRI CITY REGIONAL STP	Willamette	25.5
41	LOPOWER	LAKE OSWEGO	Willamette	21.0
42	70735/A	TRYON CREEK WWTP	Willamette	20.2
45	62795/A	OAK LODGESTP	Willamette	20.1
57	16590/A	KELLOGG CREEK STP	Willamette	18.5
72	106060/A	OMSI	Willamette	13.5
88	70596/B-001/7	CASCADE GENERAL, INC.	Willamette	6.5
88	70596/B-001/8	CASCADE GENERAL, INC.	Willamette	6.5
88	70596/B-002	CASCADE GENERAL, INC.	Willamette	6.5
88	70596/B-003	CASCADE GENERAL, INC.	Willamette	6.5
91	68471/A-003	ATOFINA CHEMICALS, INC.	Willamette	7.4
91	74995/A-002	RHONE-POULENC AG	Willamette	7.0
91	74995/A-003	RHONE-POULENC AG	Willamette	7.0
91	68471/A-001	ATOFINA CHEMICALS, INC.	Willamette	7.4
91	68471/A-002	ATOFINA CHEMICALS, INC.	Willamette	7.4
91	74995/A-001	RHONE-POULENC AG	Willamette	7.0
91	68471/A-004	ATOFINA CHEMICALS, INC.	Willamette	7.4
92	93450/A-MV1	WACKER SILTRONIC CORPORATION	Willamette	6.3
92	93450/A-MV3	WACKER SILTRONIC CORPORATION	Willamette	6.3
102	64905/A-002	PORTLAND STEELWORKS - RIVERGATE	Willamette	2.7
102	64905/A-001	PORTLAND STEELWORKS - RIVERGATE	Willamette	2.7
124	84069/A-001	ST HELENS STP	Columbia	86.0
201	74860/A-002	REYNOLDS ALUMINUM	Columbia	120
201	74860/A-001	REYNOLDS ALUMINUM	Columbia	120
288	74470/C	COASTAL ST. HELENS CHEMICAL	Columbia	82.0
311	70825/A-001	PGE - TROJAN NUCLEAR POWER PLANT	Columbia	72.5
311	70825/A-002	PGE - TROJAN NUCLEAR POWER PLANT	Columbia	72.5
372	35173/A	GRESHAMSTP (SEE FILE NO. 110254)	Columbia	117.5
391	Ameron/SW	AMERON	Columbia	108
391	Ameron/CB	AMERON	Columbia	108
391	Ameron/PWW	AMERON	Columbia	108
391	Ameron/BBD	AMERON	Columbia	108

Table 14.Oregon Point Sources for the Model

Figure 61.Oregon Point Source locations

Storm and Combination Sewers

Other point sources in the Willamette Basin include the storm sewer and combined sewer outlets in Portland and upstream districts.The locations of these outlets were acquired from the individual districts.Most of the data however is not in a digital format.The contributing land surface area to each outlet is typically less understood.The City of Portland provided AutoCAD drawings for each of their Storm and Combined Sewers, as well as aerial photos of the outlets.Little data though exists for flow rates from each of these discharges even though the City of Portland has a computer model of their sanitary and storm water system using the EPA Storm Water Management Model (SWMM).

One study underway by the City of Portland examines the Swan Island area.A rational method analysis was performed on a storm sewer collection system on Swan Island with water quality measured by the City of Portland, BES at selected manholes.The study estimated flow into the Willamette River and associated water quality for a few winter storms.The study is ongoing and with an expanded scope could provide valuable data for winter modeling.

The City of West Linn utilized the EPA SWMM model to evaluate all existing major basins in West Linn for 10 and 25 year storm events.This model was constructed to provide a Drainage System Capacity Evaluation component to the City of West Linn Master Storm Drain plan.Woodward Clyde Consultants, Inc. performed this study in 1996. Assumptions used to generate the model included:

1.The maximum 24-hour rainfall in the city as derived from the applicable regional NOAA Atlas

2.The standard 10 year return frequency 24-hour maximum rainfall in the city is 3.3 inches.

The distribution of rainfall within the 24-hour period is based on the SCS Type 1A rainfall distribution.

Table 15.West Linn Storm Water Management Model Results

Due to the lack of consistent water quality and flow data and the focus on summer low-water conditions in the Lower Willamette River modeling, stormwater and CSO inflows were not considered as point sources in the model.

Washington

In Washington the State Department of Ecology was contacted and a list identified for all majorpoint sources contributing to the Columbia River in the model domain.The locations of these sites are shown in Figure 62.Some of the point sources identified discharged into tributaries of the Columbia River downstream of where gaging stations were used to characterize the tributary flows. Eleven sites were neglected from inclusion in the model since their flow was not significant and would not have much influence on water quality in the Lower Willamette as shown in Figure 62. There were 47 point sources considered in the model, and these are listed in Table 16.Some of these point sources were combined if they discharged to the same model segment.Similar to the point sources identified in Oregon, the extent of the data was found to be limited.Many water quality constituents, such as nutrients, were not monitored.Data were collected on a monthly basis or less frequent.

Figure 62.Washington Point Source locations

Model Seg.	Outfall ID	Facility Name	Receiving Water	River Mile
194	1	ALLWEATHER WOOD TREATERS	Columbia	122.9
194	2	ALLWEATHER WOOD TREATERS	Columbia	122.9
308	001C	BFGOODRICH	Columbia	74.0
308	002C	BFGOODRICH	Columbia	74.0
308	1	BFGOODRICH	Columbia	74.0
308	2	BFGOODRICH	Columbia	74.0
233	1	BOISE CASCADE VANCOUVER	Columbia	106.0
199	1	CAMAS STP	Columbia	121.1
304	1	CLARIANT CORP	Columbia	76.1
202	1	FORT JAMES CAMAS	Columbia	120.0
201	2	FORT JAMES CAMAS	Columbia	120.3
201	S	FORT JAMES CAMAS	Columbia	120.3
306	1	KALAMA STP	Columbia	75.0
434	1	LONGVIEW FIBRE LONGVIEW	Columbia	67.5
433	S	LONGVIEW FIBRE LONGVIEW	Columbia	68.0
339	1	LONGVIEW STP	Columbia	60.4
225	1	MARINE PARK WATER RECLAMATION FACIL	Columbia	109.5
306	1	PORT OF KALAMA	Columbia	75.2
332	002A	REYNOLDS METALS LONGVIEW	Columbia	63.2
332	002B	REYNOLDS METALS LONGVIEW	Columbia	63.2
332	1	REYNOLDS METALS LONGVIEW	Columbia	63.2
332	3	REYNOLDS METALS LONGVIEW	Columbia	62.8
256	1	SALMON CREEK STP	Columbia	95.3
239	1	VANALCO	Columbia	103.0
239	2	VANALCO	Columbia	103.0
235	1	VANCOUVER WEST STP	Columbia	105.0
193	1	WASHOUGAL STP	Columbia	123.2
330	00C	WEYERHAEUSER LONGVIEW	Columbia	63.9
330	1	WEYERHAEUSER LONGVIEW	Columbia	63.9
330	2	WEYERHAEUSER LONGVIEW	Columbia	63.9
330	3	WEYERHAEUSER LONGVIEW	Columbia	63.9
330	4	WEYERHAEUSER LONGVIEW	Columbia	63.9
330	OCL	WEYERHAEUSER LONGVIEW	Columbia	63.9
330	OWP	WEYERHAEUSER LONGVIEW	Columbia	63.9
330	5	WEYERHAEUSER LONGVIEW	Columbia	64.0

Table 16.Washington Point Sources for the Model