J-Ditch Pipeline Assoc.
McCall, Idaho
CES designed and performed project engineering for the installation of this two phase project. The project irrigates approximately 4,200 acres of pasture and seed potato ground near McCall, Idaho and was funded through a variety of State and Federal programs. City of McCall wastewater is delivered (a third phase installed by McCall) to the J-Ditch Pipeline where it is mixed with fresh water for delivery under gravity pressure to approximately 18 landowners. The J-Ditch Pipeline Association (JDPAI) was formed as a non-profit private corporation to install both the pipeline portion and the on-farm portion of the project.

Pipeline Project: CES designed this approximately 20 mile pipeline network for the delivery of both fresh water and City of McCall wastewater to the project area. The system includes duel 30-inch PVC mainlines, irrigation diversion structure and flow measurement vault equipped with trans-sonic flow meters for accurately mixing fresh and process water. CES completed the design and developed drawings, specifications, contracting and bid documents. On-site project engineering and construction inspection was provided with additional inspection by the Valley Soil and Water Conservation District.

On-Farm Irrigation Project: CES also provided project engineering for the on-farm irrigation system portion of the project. Approximately 20 center pivots, many wheel lines and solid set big guns have been installed. CES worked extensively with the NRCS and local land-owners. NRCS provided initial landowner plans, although all plans were modified as requested by landowners prior to installation.

City of Ontario
Ontario, Oregon
CES has been employed by the City of Ontario (City) via a Master Service Agreement since 1996. Significant project accomplishments include:

Bentonite Lining of Wastewater Ponds: CES provided engineering design for the rehabilitation of two lagoon cells totaling approximately 46 surface acres. A detailed alternative analysis was performed evaluating the cost and performance of six alternative lining systems. The selected design was a 15 percent bentonite lining on the bottoms of the lagoons and covered PVC lining on the sides on the lagoons. The primary consideration for the selection of a bentonite liner was the expected presence of "bio-gas", although cost was also a significant consideration. CES specified Teague Mineral Product's, located in nearby Adrian, Oregon, as the approved source of bentonite following detailed testing and evaluation. In addition to lining the lagoon cells, several dikes were raised to provide additional cost effective storage. CES provided preliminary design criteria to the Oregon Department of Environmental Quality (DEQ) prior to having the design approve by DEQ. The project was funded under the Oregon State Revolving Fund and CES developed all project engineering documentation required by this program. CES provided the City with comprehensive designs, specifications, contract and bid documents in addition to providing engineering oversight and inspection throughout the project. This $1.1 million project was completed on time and under the engineer's cost estimate.

Facilities Plan Update: A comprehensive Facilities Plan was prepared for the City addressing the treatment and disposal of the City's expected increase in wastewater flows due to the Snake River Correctional Institute's (SRCI) expansion. Key components of the this analysis included the benefits versus cost of land application of wastewater effluent, additional storage and increased discharge to the Snake River. CES provided alternative analysis for two land application areas which included site characterization and engineering economic analysis. This Facilities Plan was approved by both the City Council and DEQ. CES provided leadership for public and City Council input throughout the planning process. A key component of the Facilities Plan was an analysis of the economic impacts related to wastewater treatment due to the SRCI expansion. This information formed the basis for the City's negotiation with the Oregon Department of Corrections to cost share for project installation.

Evaluation of Wastewater Application on the City Golf Course: As a result of significant public output, the City authorized CES to conduct an evaluation of using the City's golf course for Wastewater Land Application. This study reaffirmed the facilities Plan Update and positioned the City for increased public investment at the golf course and related facilities.

Outfall Diffuser: At the direction of DEQ, the City authorized CES to design an improved outfall diffuser for the discharge of wastewater to the Snake River. CES utilized the DEQ recommended CORMIX model and was able to show that the City's diffuser was currently in compliance and expected to remain in compliance for the next 20 years with DEQ standards. As a result, DEQ did not require the City to invest in an improved outfall diffuser.

Recommended Plan Project Design: CES completed the design of the Facilities Plan Recommended Plan. Design assistance was provided by Earth Tech who teamed with CES to deliver the design in a timely manner. CES was the lead on the project which involved:

• Wastewater Main Pumping Station: A supplemental pumping station was added to the City's current pumping station to deliver water to the proposed Land Application site. This pumping station includes all electrical controls and systems required to meet the project requirements.
• 4.5 Mile Wastewater Transmission Line: A 4.5 mile wastewater transmission line was designed to transport wastewater to a new storage reservoir and Land Application site. Two segments of this project have already been installed with CES providing project engineering services (design, specification, bid documents, construction management and inspection). This first section was the Malheur River crossing and the second section involved crossing private landowner's property prior to the upcoming irrigation season.
• 80 Million Gallon Storage Reservoir: CES has completed the design of an 80 million gallon storage reservoir located 4.5 miles from the City's current wastewater treatment plant. This reservoir was lined with an HDPE liner and contains approximately 75,000 cubic yards of earthfill. Design and geotechnical evaluation was performed by a team of CES engineers and geologists.
• 400 Acre Wastewater Land Application System and Pumping Station: CES designed the 400 acre irrigation system and pumping station.