100friendsofportorford.files.wordpress.com€¦ · Web viewTable of Contents. List of Tables..... iii

Recycled Water Use Plan, City of Port Orford – Pacific Gales Golf Course

Table of Contents

List of Tables........................................................................................................................ .iii

List of Figures....................................................................................................................... .iii

List of Appendicies................................................................................................................ . iii

List of Acronyms.................................................................................................................... iv

Section 1: Introduction ........................................................................1-1

Section 2: Beneficial Purposes .............................................................2-1

Section 3: Wastewater Treatment ........................................................3-1

3.1 Treatment System.........................................................................3-1 3.1.1 Existing Facilities ...............................................................3-13.1.2 New WWTP Facilities ........................................................ 3-33.1.3 Golf Course Facilities ........................................................ 3-5

Section 4: Recycled Water Monitoring and Sampling........................... 4-1

4.1 Recycled Water Quantity............................................................... 4-14.2 Water Quality…………................................................................. 4-1

Section 5: System Maintenance and Contingency Procedures ............5-15.1 Maintenance .................................................................................5-15.2 Contingency ..................................................................................5-1

Section 6: Recycled Water Transmission, Storage, Distribution andPlumbing ..............................................................................

6-16.1 Recycled Water Storage ...............................................................6-16.2 Recycled Water Transmission, Distribution and Plumbing.............6-1

Section 7: Public Health and Environmental Controls........................... 7-1

7.1 Public Health and Environmental Concerns ..................................7-17.2 Agency Controls............................................................................ 7-17.3 Public and Personnel Notification...................................................7-1

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Section 8: Land Application Plan...........................................................8-1

8.1 Site Description .............................................................................8-18.1.1 Tax Lot Information………….............................................. 8-18.1.2 Zoning and Land Use Compatibility....................................8-1

Table of Contents (continued)

Section 9: Site Characterization............................................................9-1

9.1 Site Characterization .....................................................................9-19.1.1 Climate............................................................................. ..9-19.1.2 Topography and Hydrology ……………………...................9-19.1.3 Soil Characteristics ........................................................... 9-2

9.2 Crops ............................................................................................ 9-2

Section 10: Irrigation System……...........................................................10-1

10.1 Irrigation System Plot ..................................................................10-110.2 Storage and Distribution .............................................................10-110.3 Daily Operations .........................................................................10-210.4 Drainage System Layout and Controls .......................................10-2

Section 11: Application Rates and Irrigation Scheduling……….............11-111.1 Irrigation Scheduling ………………………………………………...11-111.2 Recycled Water Quality .............................................................. 11-111.3 Recycled Water Quantity Required ............................................. 11-111.4 Application Rates ........................................................................11-211.5 Precipitation ................................................................................11-211.6 Supplemental Fertilizer ............................................................... 11-2

Section 12: Site Monitoring Plan…….…..................................................12-1

12.1 Site Monitoring Plan ....................................................................12-112.1.1 Soil and Biomass Sampling ...............................................12-112.1.2 Soil Moisture Monitoring................................................... 12-1

Section 13: Records and Reports ..........................................................13-113.1 Record Keeping........................................................................... 13-1

13.1.1 Monthly Reporting ............................................................13-113.1.2 Site Log Book...................................................................13-113.1.3 Annual Reporting.............................................................. 13-1

13.2 Recycled Water Limitations and Requirements ............................13-2

References..................................................................................................... ....................13-3

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List of Tables

2.1 Summary of Beneficial Purposes4.1 Summary of Recycled Water Irrigation Quantity4.2.1 City Minimum Monitoring and Reporting Requirements4.2.2 Recycled Water Monitoring Requirements11.2 Recycled Water Quality11.5 Average Monthly Precipitation Rates in the Port Orford Area11.6.1 Supplemental Fertilizer Application Rates: Phase 1 Turf Establishment11.6.2 Supplemental Fertilizer Application Rates: Phase 2 Established Turf

List of Figures

1.1 Vicinity Map3.1 Existing Wastewater Plant Process Diagram3.2 Proposed WWTP Improvements3.3 Recycled Water Irrigation System Area3.4 Golf Course Irrigation Layout8.1.2 Curry County Zoning Map10.4 Drainage System Layout and Controls

List of Appendices

A: Sewer Treatment Facility Water Use AgreementB: Oregon Administrative Rules: Division 55 Governing Reclaimed WaterC: Pacific Gales Golf Course Management PlanD: Irrigation System Plans, Site Maps, and Pacific Gales Golf Course Sprinkler SpecificationsE: USDA Soils ReportF: Water Balance and Nutrient Loading AnalysisG: Record Keeping Log

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H: NPDES PermitI: WPCF Permit

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Section 1: IntroductionThe site of the Pacific Gales Golf is located on 354 leased acres of the Knapp Ranch. Knapp Ranch is located two miles north of the City of Port Orford, and west of Highway 101. This location is within a mile of the Elk River to the north, and the Pacific Ocean on the West. Refer to Figure 1.1 for a vicinity map.

This report presents the Recycled Water Use Plan (RWUP) for the land application of the City of Port Orford’s (City) effluent on the Pacific Gales Golf Course (Golf Course). The recycled water program is governed under Oregon Administrative Rule (OAR) Chapter 340 Division 55 (OAR 340-055) and guided by Oregon Department of Environmental Quality’s (DEQ) 2009 Recycled Water Internal Management Directive (IMD).

This RWUP has been written not only to address the requirements of OAR 340-055 and the IMD but also to allow review by DEQ for permitting of the use of recycled water from the City’s WWTP to irrigate the Pacific Gales Golf Course. This RWUP is to be updated during each Water Pollution Control Facility (WPCF) Permit renewal and will supersede any previous plans.

The City currently operates a wastewater collection, treatment, and disposal system under National Pollution Discharge Elimination System (NPDES) Permit # 101001. To discharge effluent to an additional source, the City’s NPDES permit would be modified to allow for a second outfall. The Pacific Gales Golf Course would then manage the recycled water through a Water Pollution Control Facilities (WPCF) permit.

The following is contact information of parties responsible for operation and oversight of the irrigation system:

Troy Russell88432 Trout Pond LaneBandon, OR [email protected] home541-297-1078 cell

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mailto:[email protected]


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Figure 1.1: VICINITY MAP

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Section 2: Beneficial Purposes

Table one (1) below summarizes the proposed beneficial end uses of Pacific Gales Golf Course recycled water, as required in OAR 340-055-0025(1)(c). Recycled water will be used to irrigate the golf course including; tees, greens, fairways and roughs.

Table 2.1 Summary of Beneficial Purposes

Beneficial PurposeClass of

Recycled Water Quantity FrequencyGolf Course Irrigation C 2,500 gpm 3 hrs/dayGolf Course Water Pond

C 100 acre-feet N/A

Landscape Irrigation C TBD TBDNonstructural Fire Suppression

C TBD TBD

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Section 3: Wastewater Treatment

Section 3 describes the treatment system operating at the City’s WWTP, including information on the quantity and quality of both wastewater and recycled water.

3.1 Treatment SystemThe City of Port Orford (City) owns and operates a 90,000 gallon per day (gpd) Average Dry Weather Flow (ADWF) treatment facility that processes wastewater from residential and commercial retail origins. There are no industrial users on the system. The City’s WWTP Outfall No. 1 pumps final effluent to a gravity line and then is disposed of through an ocean outfall. Pacific Gales Golf Course will use a secondary effluent outfall for irrigation of the golf course. Outfall 2 would be the source of recycled water.

3.1.1 Existing FacilitiesThe City of Port Orford’s conventional Wastewater Treatment Plant (WWTP) was originally constructed in 1960s and significant upgrades completed in 2005. The WWTP was designed to treat a peak day average flow (PDAF) of 0.69 million gallons per day (MGD). Final effluent is UV disinfected and then is pumped to an ocean fall (Outfall No.1).

The WWTP is designed to operate as an activated sludge treatment process. Raw sewage is pumped to the headworks for grit removal and then is conveyed to an activated sludge treatment process. The sewage is treated through a series of aeration basins, and the sludge is removed by pumping and processed in the sludge stream. Waste activated sludge (WAS) is aerobically digested and then pumped to a humus pond for long-term storage. Effluent goes through ultraviolet (UV) disinfection and is then pumped through an eight inch diameter force main to the ocean outfall (Outfall No. 1). Pumps lift effluent flows to a gravity system that flows from an elevation of 40 feet above mean sea level (MSL) to the outfall diffuser located at approximately -40 feet MSL.

Outfall No. 1 has a 1.0 MGD capacity. Per the City of Port Orford Waste Water Facilities Plan (Dyer, 2016), for the years 2010 through 2013, the average dry weather flow (ADWF) was 0.09 million gallons per day (MGD). For the years 2010 through 2014 the average wet weather flow (AWWF) was 0.14 mgd.

The WWTP NPDES permit limits require at least a Class D effluent discharge. However the plants Daily Monitoring Reports indicate the plant achieves a Class C effluent. A summary of the plants effluent water quality monitoring and test results are provided in Appendix A.

Figure 3.1 shows the existing system flow schematic of the WWTP.

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Figure 3.1: EXISTING WASTEWATER PLANT PROCESS DIAGRAM

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3.1.2 New WWTP FacilitiesFrom March 1 to October 31 of each year, nearly 100 percent of the WWTP’s effluent will be sent to the Pacific Gales Golf Course located leased property on the Knapp Ranch. Appendix A contains the Oregon Water Resources Department (OHA) Registration of Reclaimed Municipal Water Use form for the Knapp Ranches. Approximately 90 acres of fescue turf will be under irrigation during the dry season. Approximately one day per week the effluent flow will be discharged through Outfall 1 to flush he existing diffusers.

The new WWTP facilities are: a diversion manhole in the UV effluent line, a gravity line to the recycled water pump station wet well, a recycled water pump station, a disinfection chemical feed system that injects into the force main, and a force main to transport the effluent from the WWTP to an effluent storage pond at the Pacific Gales Golf Course. Also included will be a high flow bypass line in the event the recycled water pump station requires taking off line for repairs. In the event of a WWTP upset and the NPDES treatment limits are not achieved, the effluent will be bypassed to a City storage lagoon.

A calcium hypochlorite tablet based feeding system skid mounted (tablet based) disinfection system will inject a solution into the force main. A programmable logic controller (PLC) will be installed located on the skid and activated by the recycled water pump station control panel. The PLC features automatic solution tank refill, and delivers up to 150 lbs. AvCL per day.

Power supplied to the WWTP recycled water pump station will be a new pole mounted metered electrical service to the pump recycled water pump station control panel. The system will be provided with several local alarms which include pump failure and overflow. Alarms will be local utilizing a horn/light. In the event of a power outage recycled water will overflow to the effluent pump station wet well.

The site plan shown in Figure 3.2 illustrates the proposed arrangement for the new WWTP recycled water infrastructure.

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Figure 3.2: PROPOSED WWTP IMPROVEMENTS

3.1.3 Golf Course FacilitiesThe onsite irrigation pump system will consist of; a recycled water storage pond, three skid mounted turbine pumps and a Jockey low flow pump, all sized to 2500 gpm at 80 psi, and zone controlled irrigation systems on the golf course including tees, greens, fairways and roughs.

The recycled water storage pond has approximately seven acres surface area. The pond will be fed by a 4 inch diameter pipe line (from the City of Port Orford WWTP) that enters the pond from the north. The irrigation pump station will be located on the south portion of the pond bank. The pond will receive treated recycled water from the WWTP during the months of May through October. The pond will average 15 feet deep and have two feet of free board.

Water quality standard at the point of reuse is a Class C recycled water. Standards at the point of reuse include a maximum Total Coliform count of 23 organisms per 100 mL and a maintain chlorine residual between 1-2 mg/L.

The irrigation system as designed covers 90 acres with an additional 27.5 acres which will serve as an irrigation water winter distribution field. This will allow receiving recycled water the year around and if golf course irrigation is not required the irrigation water can be sent to the distribution field. Under no circumstance will the irrigation pond overflow, discharging irrigation water to the surrounding areas on site or off site. The irrigation system for the golf course will consist of approximately 1,260 valve-in-head sprinklers, on a 60’ triangular spacing. Each sprinkler will have individual control of its time of operation and run times controlled by a central computer. A weather station will be included for onsite access to weather data with emphasis on evapotranspiration rate and wind velocity and direction

A schematic drawing of the golf course irrigation system is shown in Figure 3.3 and Figure 3.4. The golf course management plan is provided in Appendix C. Irrigation is limited to off hours or during periods of low public contact through the use of the irrigation controllers. Setbacks and buffers are required between the recycled water use, potable water supply wells and public access are required. Class C setback requirements from the sites property boundary line or the sites leased boundary line are 10 feet for drip (or direct soil application) and 70 feet for spray irrigation.

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Figure 3.3: RECYCLED WATER IRRIGATION SYSTEM AREA

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Figure 3.4: GOLF COURSE IRRIGATION LAYOUT

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Section 4: Recycled Water Monitoring and Sampling

Section 4 describes the recycled water quantity and quality monitoring and sampling procedures for the Pacific Gales Golf Course reuse program per OAR 340-055-0025(1)(e).

4.1 Recycled Water QuantityAn onsite golf course irrigation pond store treated wastewater produced by the city before it is recycled through golf course irrigation system. Wastewater will be intercepted downstream of the city’s UV system and pumped directly to the golf course. The irrigation water sources will be approximately 100 gallons per minute (GPM) or average 144,000 gallons per day (GPD) from the Port Orford recycled water outfall. The estimating the annual irrigation water usage is approximately 32.5 million gallons (100 acre feet) per year. This quantity allows 12 inches of irrigation water over the entire golf course. The maximum daily usage has been calculated to apply approximately 494,000 gallons in one night (this may only occur a few nights per year). The irrigation pump station will be sized for approximately 2,500 gpm based on the maximum daily usage (494,000 gallons) and a very short watering window of approximately 3 hours. The 3 hour watering window will fall between 10 PM and 5 AM depending on the wind patterns and time of intense winds. A magnetic flow meter is provided at the irrigation pump station to measure the volume of the recycled water land applied.

Table 4.1 summarizes the amount of Class C recycled water that will be used to irrigate the Pacific Gales Golf Course.

Table 4.1. Summary of Recycled Water Irrigation Quantity

Event Flow(gpm)

90-Acre IrrigationDemand (gpd)

IrrigationEvent (in)

Peak 2,500 494,000 0.12Average 1,360 245,000 0.09

4.2 Water Quality

The city’s NPDES permit will apply to both Outfall 001 and the new Outfall 002. Per the City’s NPDES Permit;

The current ocean outfall (Outfall No. 1) effluent quality permit limit is:Fecal coliform - “May not be more than 126 organisms per 100 mL”.

Enterococci - “May not exceed a monthly geometric mean of 35 organisms per 100 mL and no single sample may exceed 104 organisms per 100 ml”.

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Table 4.2.1. City Minimum Monitoring and Reporting Requirements

Item or Parameter Minimum Frequency Type of SampleTotal Flow (MGD) Daily MeasurementFlow Meter Calibration Annually VerificationBOD5 1 per week CompositeTSS 1 per week Composite

ositepH 2 per week GrabFecal coliform 1 per week GrabEnterococci 1 per week GrabPounds Discharged (BOD5 and TSS) 1 per week CalculationAverage Percent Removed (BOD5 and TSS) Monthly CalculationTemperatureUV Intensity

2 per weekDaily

GrabMeasurement

The City’s UV disinfection system has been able to consistently meet NPDES permit Fecal Coliform limits of no more than 126 organisms per 100 mL in a single sample. Between the years of 2011 and 2013 the existing plant’s maximum Fecal was 11.87 CFU/100 mL and the three year average was 5.41 CFU/100 mL. The 2013 DMRs indicated effluent Fecal Coliform was typically 4 to 8 organisms per 100 mL. During the summer, the existing plant’s effluent production is better than the Class C effluent limit requirements. In the event of a plant upset (summer effluent fails to meet a Class C fecal permit limit), the effluent would be discharged through the ocean outfall in accordance with the NPDES permit requirements. Refer to Appendix B for an analysis of the DMR’s.

A chlorine solution will be injected into the recycled water supply force main at the wastewater pump station, adjacent to the city’s WWTP. The chlorinator will operate utilizing pump flow signal to pace to dosage to achieve the chlorine residual. A chlorine residual will be maintained in the recycled force main during the summer month’s operations. Chlorine residual will dissipate in the storage pond prior to land application. To reduce the potential for algae growth the pond should have a minimum depth of 4 feet and side slopes not to exceed 3 horizontal to 1 vertical.

Pacific Gales WPCF permit will set the water quality standards for the onsite irrigation. Recycled water is to meet Class C standards per OAR 340-055. Class C recycled water will neither exceed a median of 23 total coliform organisms per 100 mL based on the last seven days of analyses conducted nor exceed a limit of 240 total coliform organisms per 100 mL in any two consecutive sample.

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Table 4.2.2 below summarizes the recycled water parameters monitored under the by Pacific Gales Golf Course WPCF Permit.

Table 4.2.2. Recycled Water Monitoring Requirements

Item or Parameter Minimum Frequency Type of SampleTotal Flow Delivered (MGD) to Each Reuse Activity Daily MeasurementFlow Meter Calibration Annually VerificationTotal Coliform (organisms/100 mL) 1 per week GrabChlorine Residual ??? GrabNutrients (TKN, NO2+NO3-N, Total Phosphorus) (a)(b) ??? Grab

Not es: (a) TKN = Total Kjehldahl Nitrogen(b) NO2+NO3-N = Nitrite + Nitrate-Nitrogen

Monitoring specified in Table 4.2.2 will be completed under the WPFC permit and performed at the onsite irrigation pump station wet well.

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Section 5: System Maintenance and Contingency Procedures

Section 5 describes how the Pacific Gales Golf Course equipment and processes will be maintained per OAR 340-055-0025(1)(f), as well as a description of contingency procedures per OAR 340-055-0025(1)(d).

5.1 Maintenance

Typical maintenance procedures that the Golf Course staff will perform on the irrigation system include sprinkler, valve and pump inspections and occasional replacement. Sprinkler inspections will include checking for irrigation coverage of each head, clogged nozzles, nozzle pressure, weeping at all valve-on-heads and electric valves, corrosion of connections or wires, animal damage, and moisture or rain shut off sensors. Valve inspections will include checking access to boxes and cleaning out any soil build up, checking flow controls, checking wire connections, ensuring all electrical valves open and close automatically and manually, checking that gate and ball valves open and close and are free of debris, and pressure checks on all pressure regulating valves. Another maintenance measure will be performed is hand watering of the greens throughout the dry season.

Pump station maintenance would include daily (during irrigation season) operational check-ups, checking motors and rotating elements of pumps for higher than normal temperature, and visually inspecting pumps and motors for coating failure and oxidation and reapplying protective coatings and paint as necessary. Annual maintenance would include following manufacturer O&M, examining all metal to metal fittings and recondition when needed, inspecting stuffing box and pump casing for corrosion, and inspecting impeller and interval wear components for corrosion, erosion, and cavitation. Records of inspections and repairs will be kept. Equipment will be kept clean, dry and painted. The effluent force main transporting Class C recycled water from the City’s WWTP to the Golf Course will undergo annual route inspections by the Pacific Gales Golf Course maintenance staff.

The recycled water storage pond located on Golf Course grounds will be maintained through damage inspections, hydrocarbon build-up monitoring, monitoring for sediment accumulation, and examination of the inlet and outlet devices for debris, and the repair of undercut and eroded areas. In the event of a power failure or mechanical failure recycled water will remain in the storage pond until the essential equipment becomes operational.

Refer to Appendix C for additional maintenance procedures.

5.2 ContingencyAn overflow line will be installed from the recycled water pump station wet well to the WWTP effluent wet well. In the vent of failure of the mechanical system located on the City’s WWTP plant site, flows will be bypassed to an city owned storage lagoon. Mechanical equipment includes the recycled water pump station and the dry calcium hypochlorite feeding system.

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Section 6: Recycled Water Transmission, Storage,Distribution and Plumbing

Section 6 describes Pacific Gales Golf Course’s recycled water transmission, storage, and distribution systems, including plumbing considerations to avoid cross connections.

6.1 Recycled Water Storage

Recycled water will be stored on site at the Golf Course in a series of irrigation pond. The irrigation pond will have a total capacity of approximately 32,586,000 gallons, or 90 acre-feet of storage capacity. The pond will be 7 acres, with an average depth of 15 feet. In the event of a high volume rainfall, bio swales located near the center of the Golf Course will catch the majority of the overflow irrigation water. The bio swales empty into a detention basin on the southwest end of the Golf Course, which drains to a wetland. Irrigation overflow on the west side of the Golf Course can overflow to a bioswale near the Southwest corner of the golf course, and then via pipe to an outfall behind the foredune at the beach.

6.2 Recycled Water Transmission, Distribution and PlumbingThe recycled water main is chlorinated by injection into a 4-inch diameter buried pipe line that will run from the WWTP to the Golf Course irrigation storage pond. Class C recycled water will be delivered to the irrigation site via the 4 inch diameter pipe line with a capacity of 125 gpm. The 4-inch line will be buried with a minimum two (2) feet of cover. Recycled water and potable pipes are separated per health department standards..

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Section 7: Public Health and Environmental Controls

Section 7 discusses potential public health and environmental concerns from Pacific Gales Golf Course’s beneficial reuse of Class C recycled water, including measures taken to control adverse effects on public health and the environment.

7.1 Public Health and Environmental ConcernsSince the Class C recycled water program has not been implemented to date at the Pacific Gales Golf Course, no public health or environmental concerns have been identified by the Golf Course. Maintaining the Class C standards for recycled water combined with the controls discussed below in Section 7.2 will address potential public health and environmental concerns.

7.2 Agency ControlsOAR 340-055-0012(5) contains regulations regarding the use of Class C recycled water. ClassC recycled water can be used for a number of beneficial uses, such as irrigation of processed food crops; irrigation of orchards or vineyards when an irrigation method is used to apply recycled water directly to the soil; landscape and golf course irrigation; and water supply source for landscape impoundments.

All new irrigation equipment at the Class C recycled water site will be marked by signage as non-potable water. Where sprinkler irrigation is used, recycled water will be sprayed at a minimum of 70 feet from the edge of an area where food is being prepared or served, or where a drinking fountain is located. There will be a minimum of 100 feet from the edge of an irrigation site to a water supply source used for human consumption. The spray pattern of sprinkler nozzles will be adjusted to reduce throw of water onto buildings, structures, vehicles, and paved surfaces during irrigation system start up. The irrigation system will be monitored and adjusted to ensure appropriate irrigation rates and patterns occur. The public will be redistricted from direct contact with the recycled water during irrigation.

7.3 Public and Personnel Notifications

OAR 340-055-0012(5)(B) specifies the regulations regarding signage posting at the site area when using Class C recycled water for irrigating a golf course. The Pacific Gales Golf Course will post signs on site visible to the public stating that recycled water is used for irrigating the turf grass and is not safe for drinking.

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Section 8: Land Application Plan

Section 8 addresses the various aspects of the land application program, including characterization of the reuse site, irrigation system, soils and crops, site management practices, and public access or notification per OAR 340-055-0025(2)(a)-(e).

8.1 Site DescriptionClass C recycled water will be supplied to the 90-acre irrigation system of Pacific Gales Golf Course. The irrigation system will be used to irrigate approximately 90 acres turf on the Golf Course. Site maps are located in Appendix D. Maps showing locations of the tees, greens, fairways and rough irrigated with the Class C recycled water are located in Appendix D.

The Class C recycled water irrigation system area is shown in Figure 3.3.

8.1.1 Tax Lot InformationClass C recycled water will be used to irrigate on Tax Lot 4400, 300, and 500, located within portions of Section 19, 29 and 30, Township 32 South, Range 15 West, Willamette Meridian.

8.1.2 Zoning and Land Use CompatibilityThe Pacific Gales Golf Course is primarily zoned as Exclusive Farm Use (EFU) by Curry County (Figure 8.1.2). Irrigation reuse will only occur on EFU-zoned land. Per the County’s Land Use Decision, a golf course is an allowed use.

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Approximate Golf Course Location

Figure 8.1.2: Curry County Zoning Map (Curry County, 2013)


Section 9: Site Characterization

9.1 Site Characterization

9.1.1 ClimateThe Pacific Gales Golf Course is located in a coastal zone where climatic conditions are temperate-marine with mild wet winters and cool dry summers. The average temperature is 52.8 degrees F with the highest months' average 60 degrees F (July and August), and the lowest month's average is 46 degrees F (December and January). Winds are moderately strong and predominately out of the Northwest during the summer months and the Southwest during the winter months. Winds of 10 to 15 miles per hour are common. The average annual rainfall is about 72 inches per year, with most falling between November and April. The wettest month is December with a historic average of approximately 12.2 inches of rainfall. The driest month is July with a historic average of approximately 0.63 inch of rainfall.

9.1.2 Topography and HydrologyThe Golf Course is situated on a bench that is elevated approximately 100 feet above the adjacent resource land to the north, the Pacific Ocean to the west and a forested area containing a closed depressional wetland to the south. The Golf Course contains several types of land formations. The northeasterly portion of the Golf Course contains approximately 111 acres of pasture and forest land that are relatively flat with a south/southeast slope of less than one percent. There is a sand dune formation approximately 500 feet in width that extends north and south along the westerly portion of the Golf Course. The dune formation ascends westerly from the pasture for approximately 50 feet at an average slope of 50 percent and then descends westerly as a partially solidified rolling formation with an overall average slope of 12 to 15 percent. The southerly area that was historically forestland was logged approximately 6 years ago. That area contains 3 major drainages that descend southerly at an average slope of three percent to the closed depressional wetland located on an adjacent ownership. There is also a draw in the southeast corner of the Golf Course that is predominately outside the development area.

Hydrology: (from Geologic Hazard Assessment)

A review of groundwater logs east of the Golf Course indicates that groundwater locally occurs within the coarse sands and gravels of the Quaternary Middle Marine Terrace deposits at depths of from 13 feet to over 50 feet below ground surface (bgs). It has been inferred by others that this is the primary regional aquifer. The Elk River, which is north of the Golf Course approximately .6 miles, is at an average elevation of 15 feet above MSL. As such, it is inferred that the primary water table on the Golf Course is at a depth of 85 feet below ground surface. Based on observations of wetlands on portions of the Golf Course by others, it is assumed that there are shallow, perched water tables present on the Golf Course.

9.1.3 Soil Characteristics

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The Golf Course is within the Klamath Mountain Physiographic Province of southwestern Oregon, and consists of typically well drained soils with a moderate infiltration rate. The eastern 281 acres of the Golf Course is part of a marine terrace which is part of a series of broad, tectonically elevated marine terraces which cover much of the southern Oregon coast. The Golf Course, which covers a portion of the marine terrace, is principally flat and located an elevation of 100 feet above MSL. The northern portion of the marine terrace has been cultivated and the southern portion is woodlands which have been recently logged. The southwestern portion of the marine terrace consists of an isolated drainage depression which is aligned north-south and which drains south from the terrace to an elevation of approximately 60 feet above MSL. The drainage depression was dry at the time of our site visit. The southeastern portion drains gently to the south. Areas identified by others as wetlands occur within the north central and eastern portions of the marine terrace.

The western margin of the Golf Course, which comprises 56 acres, consists of elevated shorelands which are bordered on the west by sea cliffs and topped by wind deposited sand dunes. The sea cliffs are deeply incised in places by west flowing seasonal drainages which originate along the base of the foredunes on the shorelands. Much of the top of the shorelands are covered with geologically recent sand dunes which form berms and fore dunes which are generally aligned north south. The eastern portion of the sand dunes are heavily vegetated with both native and exotic brush and trees and thus protected from wind erosion. Portions of the western dunes are generally not vegetated.

A copy of A NRCS Soils Report and Geotechnical Assessment Report for the Pacific Gales Golf Course is provided in Appendix D.

9.2 CropsThe irrigation area at the Pacific Gales Golf Course receiving Class C recycled water will be planted with turf grass including Seabreeze GT – SI. creeping red fescue, Enchantment GT - chewings fescue, Bighorn GT – American sheeps fescue, Soil Guard GT – hard fescue, and beachgrass – Elymus mollis. A Water balance and nutrient loading analysis is located in Appendix E.

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Section 10: Irrigation System

10.1 Irrigation System The recycled water force main line is a 10-inch TE line shown on Figure 3.3. The 3-inch TE line runs from the Effluent Pump at the WWTP north to the Pacific Gales Golf Course for irrigation use.

The irrigation reuse areas are shown on Figure 3.3. The Pacific Gale Golf Course irrigation system will consist of a 4-inch irrigation force main running adjacent to the perimeter of the course, and then additional lines are routed to the tees, greens, fairways and rough. Irrigation water application is controlled by a sophisticated system of monitoring devices that are integrated with a computerized control system, which communicates with an equally sophisticated pumping station. All the piping is underground, and the Golf Course irrigation system is divided into individual stations, and each station is individually controlled. The sprinklers are typically spaced in triangular fashion at a 60' spacing which helps provide uniform coverage. The system will be comprised of approximately 1,260 individual stations.

The integrated, and computerized irrigation control systems allows for watering areas of the golf course to meet the specific needs of each zone on the course. The system monitors the soil moisture, and thus the needs of the turf grass at the root zone. A weather station monitors the temperature, humidity, wind, precipitation, and evapotranspiration; the system can balance the water needs of the plants with the available moisture in the soil, and adjust watering rates and schedules accordingly. During irrigation cycles the system continues to monitor soil moisture and when the threshold value is reached the system will reduce the cycle. Because the irrigation central control is integrated with the weather station, the system will also adjust an irrigation cycle during periods of precipitation. This system will match the water needs of the plants, and watering cycles much better than a manual system can.

10.2 Storage and DistributionClass C recycled water will be stored in irrigation pond on site. The storage pond will be constructed to hold approximately 32,586,000 gallons, or 100 acre-feet of water. The storage pond will be 7 acres with an average depth of 15 feet.

It is unlikely that the irrigation system of Class C recycled water will be used for the application of liquid fertilizers. The primary fertilizer application technique will be the spreading of dry fertilizers formulated into granules (slow release, or organic source fertilizers). Class C recycled water will be distributed from the irrigation storage pond through a 4 inch force main line to the sprinkler heads. Approximately 1260 sprinkler heads will be used to irrigate 90 acres of fescue turf.

10.3 Daily OperationsThere will be regular monitoring of potential instability of the bluff along the western perimeter of the Golf Course, and after high surf or high precipitation events. The Golf Course superintendent will be responsible for daily operations that deal with maintaining course conditions, and will

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include water level measurements from reservoirs; water meter reading from any water source; and computer irrigation system date on zone irrigation rates, weather, and soil readings. Daily inspections of the Golf Course grounds will include a tour of the course first thing in the morning, and will include looking for areas that did not receive water or over watered areas. Three to four greens and two to three fairways will be inspected daily. Pump house, pumping system, and meters and sensors checks will be performed daily.

10.4 Drainage System Layout and Controls

The Golf Course is located on sandy, well-draining soils. Excess rain fall and recycled water used to irrigate the Golf Course will easily drain down through the natural soil. In the event of a high volume rainfall, bio swales located near the center of the Golf Course will function as a secondary system in the event the field capacity is exceeded. The bio swales empty into a detention basin on the southwest end of the Golf Course, which drains to a wetland. Irrigation overflow on the west side of the Golf Course can overflow to a bioswale near the Southwest corner of the golf course, and then via pipe to an outfall behind the foredune at the beach.

Though surface drainage will not be a significant factor in the migration of nutrients at this facility (the sandy soils are too permeable for significant overland flows), irrigation practices could cause the migration of nutrients to the aquifer. This is the reason the computerized irrigation control system is to be installed, along with preventing costly over watering. Only during high rainfall event will over watering occur. With nearly 6 feet of recharge per year, possible excess water can be expected during winter, but with sandy soil, it will not accumulate in the root zone. Nutrients will not be leached if they have been applied in the growing season and used before the rainy season. Wet season nutrient applications will have some leaching potential but by limiting the quantity to be applied, using very slow release formulations, and timing applications carefully to void major storms the quantity lost will be so slight as to not cause a problem in the aquifer.

Figure 10.4 shows a plot of the drainage patterns and locations of and connections to surface water features.

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Figure 10.4: Drainage Patterns

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Section 11: Application Rates and Irrigation Scheduling

11.1 Irrigation SchedulingThree irrigation control programs are: spring/early summer, summer, and late summer/fall. The spring/early summer and late summer/fall programs result in the turf grass receiving less recycled water than the higher water demand time period of summer. The determination of irrigation scheduling for the three different irrigation programs are based on annual precipitation rates, plant material maturation requirements, solar exposure, and topography and soil conditions.

11.2 Recycled Water Quality

Table four 11.2 is a summary of lab results from samples taken from the effluent flow at the City’s WWTP. The results show that the effluent from the City’s WWTP meets the Class C effluent standards per OAR 340-055-0012(5). Table 4.2.2 refers to the parameters that will be monitored by the Golf Course per its WPCF permit to ensure the recycled water complies with the standards of OAR 340-055.

Table 11.2. Recycled Water Quality

Item or Parameter Result (mg/L) Reporting Limit Type of SampleAmmonia-N 0.17 0.1 Effluent GrabTotal Kjeldahl Nitrogen (TKN)(a) 5.9 0.2 Effluent GrabNitrite + Nitrate-Nitrogen (NO2+NO3-N)(b) 8.1 0.2 Effluent GrabPhosphorus, Total (as P) 2.2 0.5 Effluent GrabTotal Dissolved Solids 240 10 Effluent GrabOil and Grease, Total ND 5 Effluent Grab

Not es: (a) TKN = Total Kjehldahl Nitrogen(b) NO2+NO3-N = Nitrite + Nitrate-Nitrogen(c) ND = Not Detected

Quantity of chlorine used, chlorine residual, and pH will be analyzed at recycled water reuse point. A sample of the recycled water, after the chlorine contact, will be collected during irrigation periods based on the calendar quarter to determine nutrients (TKN, NO3-N + NO2-N, NH3-N, and Total Phosphorus) loadings to the land application area.

11.3 Recycled Water Quantity Required

Water management is very important to proper turf management and pest control. Turf grass that has been over watered, or under watered, is less resistant to attack by a variety of pests. Dense healthy turf is much more resistant, as well as more wear tolerant. After selecting turf that is salt, drought, and pest resistant, integrated management requires the proper water application to just meet the needs of the turf, especially during the warmer summer months when problems are generally greater, and the use of the Golf Course is at its peak. The irrigation system at Pacific Gales will use state-of-the-art, central computer controls, integrated with soil moisture monitoring

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and an on-site weather station. This system will control irrigation application rates to match turf grass needs. When the irrigation application matches the need, the turf grass will be its most resistant to pests, need the least amount of fertilizers (and be least likely to 'wash' the fertilizer away), and require the least mowing while still presenting a firm, playable surface.

A typical irrigation event is estimated to be 0.09” of water, which is equivalent to an irrigation flow of 1360 gpm, assuming irrigation is to occur 3 hours per day. An estimated peak event would be 0.12”, which is equivalent to 1810 gpm, again assuming that irrigation is to occur 3 hours per day. The Class C recycled water pump system is proposed to be sized to produce 2500 gpm. 90 acres of fescue turf are proposed to be irrigated by recycled water. Table 2.1 summarizes the amount of Class C recycled water that will be used to irrigate the Pacific Gales Golf Course. Assumptions and equations used to calculate the agronomic rate can be found in Appendix F.

11.4 Application Rates

The estimated monthly application rate for the Golf Course is 5 MG, and the annual rate is 30 MG, assuming irrigation months of May through October. The estimated monthly and annual water application rates account for irrigation, leaching fractions, and irrigation efficiency

11.5 PrecipitationTable 11.5 lists precipitation data for the Port Orford Area. Annual precipitation averages 74.21 inches and falls mostly during the winter. An average of 14.67 inches of precipitation falls during the irrigation months of May through October.

Table 11.5. Average Monthly Precipitation Rates in the Port Orford Area

Month Precipitation Average (in)(a)

January 11.4February 9.57March 9.69April 5.75May 3.85June 2.11July 0.63August 1.20September 2.02October 4.86November 10.89December 12.24Annual 74.21

Notes(a)Data from Climatology of the United States No. 120 1971-2000

11.6 Supplemental Fertilizer

The primary fertilizer application technique will be the spreading of dry fertilizers formulated into granules (slow release, or organic source fertilizers). Tables 11.6.1 and 11.6.2

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represent an initial guideline based upon similar turf requirements in similar situations. The actual quantities of fertilizers used will depend upon the needs of the turf and the data collected regarding nutrient levels in the soils and plant tissues. The objective is to use the minimum quantity of nutrients possible to sustain a healthy quality of turf grass necessary for a pleasant and playable Golf Course. If this is achieved, then the turf grass will be optimally pest resistant, able to sustain the most cultural impact, require the least maintenance, and nutrients will not be lost to the environment.

Tools for managing nutrients include timing of application, and type of nutrient source. The Golf Course will use a two-phased fertilizer application program. The first phase will be turf establishment. Table 11.6.1 shows the anticipated nutrient need for the first year and its general application rate. The specific application rate and schedule will be modified as necessary, based upon the quarterly soils and plant tissue samples tested for their nutrient levels. The second phase of fertilizer application will be for established turf. Table 11.6.2 shows the anticipated nutrient need once the turf has become established with a thatch and sod layer, and dense stands of turf. The need for nutrients greatly reduces in this phase because the decomposing thatch releases nutrients that were previously bound in the decaying plant matter.

Table 11.6.1. Supplemental Fertilizer Application Rates: Phase 1 Turf Establishment

Turf Type

Application Rate (lb/ 1000 SF/ year) Estimated Annual Applications

Nitrogen(a) Phosphorus PotassiumTrace

Elements Fungicide Herbicide InsecticideGreens 8 4 6 1 4-6 0-1 0-1Tees 6 4 5 1 1-2 0-1 0Fairways 4 2 3 1 0 0-1 0Rough 3 1 3 0 0 0 0Dune Grass 1 0 0 0 0 0 0Notes:

(a) ¼ pound of nitrogen applied every 3 weeks for 48 weeks (nominal)

Table 11.6.2. Supplemental Fertilizer Application Rates: Phase 2 Established Turf

Turf Type

Application Rate (lb/ 1000 SF/ year) Estimated Annual Applications

Nitrogen(a) Phosphorus PotassiumTrace

Elements Fungicide Herbicide InsecticideGreens 6 3 4 1 4-6 0-1 0-1Tees 4 2 3 1 1-2 0-1 0Fairways 3 1 3 0 0 0-1 0Rough 2 1 1 0 0 0 0Dune Grass 1 0 0 0 0 0 0Notes:

(a) ¼ pound of nitrogen applied every 3 weeks for 48 weeks (nominal)

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Section 12:Site Monitoring Plan

12.1 Site Monitoring PlanRecycled water monitoring will be conducted while irrigating to verify that public health, regulatory, and agronomic objectives are met. If results are questionable, additional samples will be warranted. The monitoring requirements are specified below.

12.1.1 Soil and Biomass Sampling

Soil samples will be taken in the fall to provide a check on the nutrients still in the soil when the winter rains are about to begin. This will allow for the plants to take up the nutrients still in the soil before winter rains potentially wash the residual nutrients past the root zone. Soil and turf tests will be used to establish the most efficient fertilization application rates and schedules, and careful nutrient budgeting.

12.1.2 Soil Moisture Monitoring

The integrated, and computerized irrigation control systems allows for watering areas of the Golf Course to meet the specific needs of each zone on the course. The system monitors the soil moisture, and thus the needs of the turf grass at the root zone. By also monitoring the temperature, humidity, wind, precipitation, and evapotranspiration, the system can balance the water needs of the plants with the available moisture in the soil, and adjust watering rates and schedules accordingly. During irrigation cycles the system continues to monitor soil moisture and when the threshold value is reached the system will reduce the cycle. Because the irrigation central control is integrated with the weather station, the system will also adjust an irrigation cycle during periods of precipitation. This system will match the water needs of the plants, and watering cycles much better than a manual system can.

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Section 13: Records and Reports

Section 13 describes the Golf Course’s recycled water program record keeping and reporting requirements.

13.1 Record KeepingRecording of all water use, nutrient use, pesticide use, monitoring methods and results, testing

results, management areas, and data on pest outbreaks and course conditions is essential to

evaluating the effectiveness of the management plan, and its implementation. Careful recording of what kinds of nutrients and where nutrients have been applied is required by this management plan, and must be reported in the Annual Report. Record keeping must include all nutrient sources such as applied fertilizers, composted matter, and recycled water. As can be expected,

any management plan will require modification with time as technology changes, needs of the course change, and management practices are found that are ineffective. Only with the collected

data can the Golf Course substantiate the need for change, and provide direction the change,

and then a more effective management plan will evolve.

13.1.1 Monthly ReportingThe Pacific Gales Golf Course will submit monthly monitoring reports to DEQ and will include any monitoring relative to reuse. When irrigating, monitoring results must be reported on approved forms and will be submitted to DEQ by the 15th day of the following month.

13.1.2 Site Log BookA site log book will be maintained for the entire irrigation area. The log book will be used to record dates of various management operations, sampling events, and observations made by operators. This record is required so that improvements to, and refinement of, the management system can be made each year. In addition, the final approval letter from DEQ for this RWUP will be included in the Golf Course’s recycled water program files. Appendix F includes sample fertilizer and pesticide application records that will be used for the site log book.

13.1.3 Annual ReportingAn annual report describing the operations and effectiveness of the RWUP will be submitted to DEQ by 31st January of the following year. The report will comply with the approved RWUP, OAR 340-055, and the limitations and conditions of the WPCF Permit. Appendix G includes a copy of the WPCF permit. The following elements as listed in DEQ’s Recycled Water Internal Management Directive, at a minimum, will be included:

• Description of changes to treatment facilities

• Description of changes to processes specific to production of recycled water

• Results of site inspection reports

• Description of any operational problems (e.g., system upsets, overflows, etc.) and the

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corrective actions taken

• Description of changes in the beneficial purpose (e.g., crop changes, water delivery times, supplemental water sources, etc.)

• Location and amount of recycled water used for each beneficial purpose

• Recycled water volume produced

• Recycled water characteristics including bacteria and turbidity, if appropriate, and other required monitoring results

• Results from any site monitoring (e.g., soil monitoring), when required by the permit orRWUP

• A summary of the resource value of recycled water use (e.g., harvest yields from an agricultural irrigation project, fertilizer savings, or saving from use of other water sources)

• Any planned or anticipated changes to the treatment facility equipment or operations during the next calendar year

• Description of any proposed/anticipated changes in water reuse operations (including major changes in agricultural practices, such as crops).

13.2 Recycled Water Limitations and RequirementsPrior to irrigation, the recycled water will meet Class C water quality standards, as defined in OAR 340-055-0012(5)(c). Before disinfection, the effluent will be treated with a filtration process, After disinfection, Class C recycled water will neither exceed a median of 23 total coliform organisms per 100 mL based on the last seven days of analyses conducted nor exceed a limit of 240 total coliform organisms per 100 mL in any two consecutive samples. In the event of a violation, the following steps will be taken:

1. Immediately take action to stop, contain, and clean up the unauthorized discharge and correct the problem.

2. Post signs notifying the public to stay off of irrigated areas and that recycled water limitations have been exceeded.

3. Within 24 hours of becoming aware of the circumstances, notify the DEQ Northwest Region, Portland, Oregon office by telephone at 503-229-5263 during normal business hours. Outside of normal business hours, DEQ will be contacted at 1-800-452-0311 (Oregon Emergency Response System). DEQ will be notified so that an investigation can be made to evaluate the impact, the corrective actions taken, and to determine additional actions that must be taken.

Notification requirements are summarized in the flow chart presented in Figure 7.

A written submittal will also be provided to the DEQ Northwest Region, Portland, Oregon office within five days of becoming aware of the noncompliance. The written submittal will contain the following:

• A description of the noncompliance and its cause

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• The period of noncompliance, including dates and times

• The estimate time noncompliance is expected to continue if it has not been corrected

• The actual quantity and quality of resulting waste discharges

• Steps taken or planned to reduce, eliminate, and prevent reoccurrence of the noncompliance

• Public notification steps taken.

ReferencesCurry County Zoning Map, 2013. Curry County Oregon Support Documents for GIS. Retrieved

July 21, 2015.

The Dyer Partnership Engineers and Planners, Inc. City of Port Orford - Wastewater Facilities Plan. The Dyer Partnership Engineers and Planners, Inc. prepared in 2016.

Web Soil Survey from the United States Department of Agriculture Natural Resources Conservation Service. Retrieved Marc, 2016.

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