ST-0207 Deer Creek WWTP Expansion Phase I_FINAL.pdf

The City of

OKLAHOMA CITY

UTILITIES DEPARTMENT

March 28, 2025

Project Title: Deer Creek Wastewater Treatment Plant Expansion, Phase I

Project Location: Deer Creek Wastewater Treatment Plant

Project Number: ST-0207

Estimated Project Cost: To Be Determined.

1.0 Project Description:

The Oklahoma City Water Utilities Trust (OCWUT) is evaluating all requirements to expand capacity at the Deer Creek Wastewater Treatment Plant (WWTP) from 15 million gallons per day (MGD) to 20 MGD.

2.0 Project Intent:

The Engineer will provide all preliminary engineering services required to develop an expansion plan for the Deer Creek WWTP. Final design, bidding, construction administration and management, inspection, and as-built services may be completed under a future amendment.

3.0 Background:

OCWUT funds, operates, and maintains the Deer Creek WWTP to provide wastewater services to its citizens and wholes ale customers. The Deer Creek WWTP is an activated sludge treatment plant located in the northwest part of Oklahoma City. This study will determine all requirements associated with expanding the Deer Creek WWTP from 15 MGD to 20 MGD. Preliminary design services will be completed for the Deer Creek WWTP expansion and will recommend a final phasing plan approach for the improvements.

3.1 Plant Overview

The Deer Creek WWTP was constructed in 1982 and is rated to treat 15 MGD. The plant underwent upgrades in 1996, 2011, 2014, and 2024. The facility treats wastewater from the Deer Creek sewershed using a combination of automatic bar screening, grit removal, primary clarification, bio-selector (abandoned in place), secondary activated sludge treatment, secondary clarification, floc carry-over, sand filtration, chlorine disinfection, and chlorine removal using sulfur dioxide. The solids treatment process consists of primary and secondary activated sludge.

Sludge dewatering is accomplished by belt press operation. All sludge is stabilized with lime to Class B designation prior to land application. This project will include the ability to process sludge from the Chisholm Creek WWTP.

Engineering Division ● 420 West Main, Suite 500 ● Oklahoma City, OK 73102

405/297-2422 ● FAX 405/297-3813

The treatment processes for the plant are outlined in the following table:

Table 1

Process Quantity Details Influent Pump Station

5 units Five Units providing a total of 22,500 GPM, and 1,000 HP

Grit Removal 2 units Each chamber treats 30 MGD Primary Clarifiers

3 units All units 95 feet in diameter and 10 - 14 feet deep Total capacity: 1.379 MG

Activated Sludge 6 units Two units 95 feet wide and 15 feet deep (anoxic) Four units 190 feet long, 25 feet wide and 15 feet deep (aerobic) Two units 190 feet long, 30 feet wide and 15 feet deep (aerobic) Total capacity: 5.00 MG

Final Clarifiers 4 units Str. 24 & 25 - Two units 120 feet in diameter and 13 feet deep Str. 27 & 28 - Two units 98 ID 100 OD feet in diameter and 17-21 feet deep. Volume – 0.143MG x2 Str 24 – Recent catwalk and inner column rehabilitated.

Total capacity: 3.797 MG

Filtration 8 units All units 25 feet long and 25 feet wide with media depth of 1 foot Total media volume: 0.0374 MG

Chlorine Contact Basins

2 units Both units 20 feet long, 40 feet wide and 10 feet deep Total capacity: 0.120 MG

Sludge Holding 2 units One unit 100 feet long, 20 feet wide and 15 feet deep One unit 100 feet long, 25 feet wide and 15 feet deep Total capacity: 0.505 MG

Miscellaneous Equipment Aeration Blowers (under construction)

5 units Three units providing a total of 18,000 cfm and 1,200 hp, 12.5% oxygen transfer Two units providing a total of 9,000 cfm and 400 hp, 12.5% oxygen transfer

RAS/WAS

Pumps

3 units Str 47, Final clarifier solids pumping. Str 27 & 28 to D2

RAS/WAS

Pumps

4 units Str. 26, RAS for Str. 24 & 25; ties to D2

Belt Filter Presses (under construction)

2 units Both units 2 meters Total processing capacity: 320 gallons per minute at 9 hp each

4.0 Deer Creek WWTP

The Deer Creek WWTP average flow is 12.5 MGD. The Oklahoma Pollutant Discharge Elimination System (OPDES) effluent permit is as follows:

Table 2

Effluent Characteristics

Discharge Limitations Monitoring Requirements

Mass Loading (lb/Day)

Concentrations (mg/l) Measurement

Frequency Sample Type

Monthly Average

Monthly Average

Weekly Average

Daily Max.

Flow (MGD) - - - Report - - - Report Daily Totalized Carbonaceous Biochemical Oxygen Demand - 5 day

Apr- Oct 625.5 5 7.5 - - -

7 per Week 24-hr composite Nov-

Mar 875.5 7 10.5 - - -

Total Suspended Solids

Apr- Oct 1251 10 15 - - -

7 per Week 24-hr composite Nov-

Mar 1876.5 15 22.5 - - -

Ammonia - as N

Apr- Oct 12.1 1 1.5 - - -

7 per Week 24-hr composite Nov-

Mar 250 2.0 3.0 - - -

E. coli

May- Sep - - - 126 - - - 406 2 per Week Grab

Oct- Apr - - - 630 - - - 2,030 1 per Week Grab

Dissolved Oxygen Year Round - - - Instantaneous Maximum:

No Measurable Daily Grab

Total Residual Chlorine

Year Round

- - - Instantaneous Maximum:

No Measurable Daily Grab pH (standard unit) Year Round - - - 6.5 - 9.0 Daily Grab

Selenium, total (µg/L)

Year Round

0.59 4.7 - - - 8.2 1 per Month 24-hr composite

5.0 Current Projects:

The following projects are currently either in design, construction, or planned for the Deer Creek

WWTP.

5.1 ST-0163-1 Deer Creek WWTP Aeration System Improvements

• Status: Construction.

• Construction Start: Spring 2025.

• Estimated completion: Summer 2026.

5.2 ST-0154-1 & ST-0161 Deer Creek WWTP Biosolids, Odor Management and Electrical Improvements - Phase 1

• Status: Construction.

• Construction Start: Spring 2025.

• Estimated completion: Spring 2028.

5.3 ST-0185 Deer Creek WWTP Clarifier Rehabilitation

• Status: Solicitation.

• Construction Start: Spring 2025.

• Estimated completion: Spring 2026.

6.0 Draft Project Scope:

The initial contract will include Task 1A - Preliminary Report services. The following subtasks are proposed. This list is not exhaustive, and it is expected the selected engineer will review and make additional recommendations.

6.1 Primary Subtasks

• Project Management and Progress Reporting.

• Kickoff Meeting.

• Existing Conditions.

o Permit Limits.

o Operation Performance.

• Assessment.

o Capacity of Major Process Units o Hydraulics Analysis o Alternatives o Biosolids Management.

• Preliminary Engineering Report.

7.0 Letter of Interest Requirements:

In addition to the requirements outlined in the advertisement, Letter of Interest submittals must also provide the below information.

7.1 Similar Project Experience

• Indicate the key aspects or characteristics of the reference project that are relevant to

OCWUT for the project which the letter of interest is being submitted.

• Indicate the members of the proposed project team who worked on the reference project and what role they served on the project.

7.2 Project Team Availability

• Specifically address the availability of each proposed project member and communicate in a quantifiable manner how much availability they have (e.g. 25%, 50%, 75%, 100%).

• If the firm has existing projects with the City of Oklahoma City or any of its Trusts, provide a list of those projects, the members of the proposed project team working on those projects, and how much of their workload is allocated to those projects.

8.0 Available Information:

Upon execution of a non-disclosure agreement, the following information will be made available for review in preparation of the Letter of Interest submissions. The executed form must be submitted to Joy Kotey (Joy.Kotey@okc.gov) and Patty Pool (patty.butenhoff@okc.gov) via e-mail.

• Relevant plant operational data.

• Available as-built drawings.

• Oklahoma Pollutant Discharge Elimination System (OPDES) Effluent Permit.

mailto:Joy.Kotey@okc.gov mailto:patty.butenhoff@okc.gov

8.0 Available Information: