Cahokia, IL Facts, Population, Income, Demographics, Economy

Median Rent: Median gross rent in 2017: $794.

Poverty (overall): Percentage of residents living in poverty in 2017: 30.9%

Poverty (breakdown): (15.7% for White Non-Hispanic residents, 41.3% for Black residents, 30.4% for Hispanic or Latino residents, 34.7% for two or more races residents)

Land Area: 9.61 square miles.

Population Density:

Median Incomes:
      Estimated median household income in 2017: $30,535 (it was $31,001 in 2000)
      Estimated per capita income in 2017: $16,149 (it was $14,545 in 2000)
      Estimated median house or condo value in 2017: $51,044 (it was $38,200 in 2000) Cahokia:$51,044IL:$195,300

Races:
      Black alone - 8,415 - 58.6%
      White alone - 5,137 - 35.8%
      Two or more races - 296 - 2.1%
      Asian alone - 249 - 1.7%
      Hispanic - 127 - 0.9%
      American Indian alone - 25 - 0.2%
      Other race alone - 31 - 0.2%

The Odawa leader Pontiac was assassinated by other Indians in or near Cahokia on April 20, 1769.

Goldribbon

Recognitions and Certifications

Accredited Drug Testing has been recognized as one of the "Top 10 drug testing companies" for excellent customer service and we have received TPA Accreditation from the National Drug and Alcohol Screening Association. We are active in all drug testing industry associations and our staff are trained and certified as drug and alcohol testing specialists.

Important Links

National Drug and Alcohol Screening Association (https://ndasa.com/)

National Drug Free Workplace Alliance (https://www.ndwa.org/)

Substance Abuse Program Administrators Association (https://www.sapaa.com/)

Substance Abuse Mental Health Safety Administration (https://www.samhsa.gov/)

US Drug Enforcement Administration (https://www.dea.gov/)

Office of Drug alcohol Policy Control (https://www.transportation.gov/odapc)

Cahokia, IL Locations

Employment, DOT, Court Ordered, Probation, School, Family

Multiple Testing Centers In Cahokia, IL

Scheduling a test is Fast and Easy, call our scheduling department or schedule your test online 24/7

* You must register by phone or online to receive your donor pass/registration prior to proceeding to the testing center.

Industry Partners

Cahokia, IL Testing Locations

(Don't see a location near you, call 800-221-4291)

916 OLIVE STREET, UNIT 2 4.0 miles

916 OLIVE STREET, UNIT 2
SAINT LOUIS, MO 63101
Categories: SAINT LOUIS MO

400 N TUCKER BLVD 4.1 miles

400 N TUCKER BLVD
SAINT LOUIS, MO 63101
Categories: SAINT LOUIS MO

1720 OLIVE ST 4.2 miles

1720 OLIVE ST
SAINT LOUIS, MO 63103
Categories: SAINT LOUIS MO

3100 Market St 4.6 miles

3100 Market St
SAINT LOUIS, MO 63103
Categories: SAINT LOUIS MO

7706 WAGNER RD 5.2 miles

7706 WAGNER RD
MILLSTADT, IL 62260
Categories: MILLSTADT IL

5000 MANCHESTER AVE 5.6 miles

5000 MANCHESTER AVE
SAINT LOUIS, MO 63110
Categories: SAINT LOUIS MO

2348 HAMPTON AVE 6.1 miles

2348 HAMPTON AVE
SAINT LOUIS, MO 63139
Categories: SAINT LOUIS MO

2331 HAMPTON AVE 6.1 miles

2331 HAMPTON AVE
SAINT LOUIS, MO 63139
Categories: SAINT LOUIS MO

6555 CHIPPEWA ST STE 100 6.3 miles

6555 CHIPPEWA ST STE 100
SAINT LOUIS, MO 63109
Categories: SAINT LOUIS MO

40 N Kingshighway, 6.4 miles

40 N Kingshighway,
Saint Louis, MO 63108
Categories: Saint Louis MO

6542 MANCHESTER AVE 6.8 miles

6542 MANCHESTER AVE
SAINT LOUIS, MO 63139
Categories: SAINT LOUIS MO

2321 MCCAUSLAND AVE STE B 7.2 miles

2321 MCCAUSLAND AVE STE B
SAINT LOUIS, MO 63143
Categories: SAINT LOUIS MO

120 KENRICK PLZ 7.4 miles

120 KENRICK PLZ
SAINT LOUIS, MO 63119
Categories: SAINT LOUIS MO

2900 LEMAY FERRY RD STE 101 7.6 miles

2900 LEMAY FERRY RD STE 101
SAINT LOUIS, MO 63125
Categories: SAINT LOUIS MO

8300 VALCOUR AVE 7.8 miles

8300 VALCOUR AVE
SAINT LOUIS, MO 63123
Categories: SAINT LOUIS MO

642 Clayton Rd. 7.9 miles

642 Clayton Rd.
Saint Louis, MO 63117
Categories: Saint Louis MO

3030 Frank Scott Pkwy W Ste 5, 8.7 miles

3030 Frank Scott Pkwy W Ste 5,
Belleville, IL 62223
Categories: Belleville IL

8730 BIG BEND BLVD STE A 9.2 miles

8730 BIG BEND BLVD STE A
SAINT LOUIS, MO 63119
Categories: SAINT LOUIS MO

2044 MADISON AVE Ste G-4 9.2 miles

2044 MADISON AVE Ste G-4
GRANITE CITY, IL 62040
Categories: GRANITE CITY IL

2044 MADISON AVE STE G1 9.2 miles

2044 MADISON AVE STE G1
GRANITE CITY, IL 62040
Categories: GRANITE CITY IL

4550 MEMORIAL DR STE 400 9.3 miles

4550 MEMORIAL DR STE 400
BELLEVILLE, IL 62226
Categories: BELLEVILLE IL

2100 MADISON AVE 9.3 miles

2100 MADISON AVE
GRANITE CITY, IL 62040
Categories: GRANITE CITY IL

5031 N Illinois 9.3 miles

5031 N Illinois
Fairview Heights, IL 62208
Categories: Fairview Heights IL

225 S MERAMEC AVE STE 305 9.7 miles

225 S MERAMEC AVE STE 305
CLAYTON, MO 63105
Categories: CLAYTON MO

28 RONNIES PLZ 9.7 miles

28 RONNIES PLZ
SAINT LOUIS, MO 63126
Categories: SAINT LOUIS MO

9556 MANCHESTER RD 9.8 miles

9556 MANCHESTER RD
SAINT LOUIS, MO 63119
Categories: SAINT LOUIS MO

8340 N BROADWAY 10.1 miles

8340 N BROADWAY
SAINT LOUIS, MO 63147
Categories: SAINT LOUIS MO

12345 W BEND DR 10.8 miles

12345 W BEND DR
SAINT LOUIS, MO 63128
Categories: SAINT LOUIS MO

10010 KENNERLY RD 11.0 miles

10010 KENNERLY RD
SAINT LOUIS, MO 63128
Categories: SAINT LOUIS MO

9950 Kennerly Rd, 11.0 miles

9950 Kennerly Rd,
Saint Louis, MO 63128
Categories: Saint Louis MO

10296 BIG BEND RD Ste 110 11.2 miles

10296 BIG BEND RD Ste 110
SAINT LOUIS, MO 63122
Categories: SAINT LOUIS MO

317 SALEM PL 11.4 miles

317 SALEM PL
FAIRVIEW HEIGHTS, IL 62208
Categories: FAIRVIEW HEIGHTS IL

3701 NAMEOKI RD STE E 11.4 miles

3701 NAMEOKI RD STE E
GRANITE CITY, IL 62040
Categories: GRANITE CITY IL

455 S KIRKWOOD RD 11.7 miles

455 S KIRKWOOD RD
KIRKWOOD, MO 63122
Categories: KIRKWOOD MO

13303 TESSON FERRY RD 12.3 miles

13303 TESSON FERRY RD
SAINT LOUIS, MO 63128
Categories: SAINT LOUIS MO

4700 NAMEOKI RD 12.6 miles

4700 NAMEOKI RD
GRANITE CITY, IL 62040
Categories: GRANITE CITY IL

1207 THOUVENOT LANE, SUITE 400 13.4 miles

1207 THOUVENOT LANE, SUITE 400
SHILOH, IL 62269
Categories: SHILOH IL

119 CHURCH ST STE 223 13.5 miles

119 CHURCH ST STE 223
FERGUSON, MO 63135
Categories: FERGUSON MO

State Highway 76 & State Highway Lower Level Claybough Plaza Ma 13.5 miles

State Highway 76 & State Highway Lower Level Claybough Plaza Ma
Branson West, MO 65737
Categories: Branson West MO

3316 W CHAIN OF ROCKS RD STE 1 13.7 miles

3316 W CHAIN OF ROCKS RD STE 1
GRANITE CITY, IL 62040
Categories: GRANITE CITY IL

128 MATRIX COMMONS DR 14.3 miles

128 MATRIX COMMONS DR
FENTON, MO 63026
Categories: FENTON MO

1050 OLD DES PERES RD STE 100 14.4 miles

1050 OLD DES PERES RD STE 100
SAINT LOUIS, MO 63131
Categories: SAINT LOUIS MO

1000 Des Peres Road Suite 200 14.4 miles

1000 Des Peres Road Suite 200
St. Louis, MO 63131
Categories: St. Louis MO

714 GRAVOIS RD Ste 100 14.4 miles

714 GRAVOIS RD Ste 100
FENTON, MO 63026
Categories: FENTON MO

615 S NEW BALLAS RD 14.6 miles

615 S NEW BALLAS RD
SAINT LOUIS, MO 63141
Categories: SAINT LOUIS MO

2880 NETHERTON, STE 101 14.7 miles

2880 NETHERTON, STE 101
SAINT LOUIS, MO 63136
Categories: SAINT LOUIS MO

508 OLD SMIZER MILL RD 14.7 miles

508 OLD SMIZER MILL RD
FENTON, MO 63026
Categories: FENTON MO

11550 OLIVE BLVD 15.0 miles

11550 OLIVE BLVD
SAINT LOUIS, MO 63141
Categories: SAINT LOUIS MO

11700 STUDT AVE 15.2 miles

11700 STUDT AVE
CREVE COEUR, MO 63141
Categories: CREVE COEUR MO

3619 RICHARDSON SQUARE DR 15.2 miles

3619 RICHARDSON SQUARE DR
ARNOLD, MO 63010
Categories: ARNOLD MO

747 N NEW BALLAS ROAD 15.3 miles

747 N NEW BALLAS ROAD
CREVE COEUR, MO 63141
Categories: CREVE COEUR MO

3613 RICHARDSON SQUARE STE 300 15.3 miles

3613 RICHARDSON SQUARE STE 300
ARNOLD, MO 63010
Categories: ARNOLD MO

13610 BARRETT OFFICE DR STE 100 15.4 miles

13610 BARRETT OFFICE DR STE 100
MANCHESTER, MO 63021
Categories: MANCHESTER MO

509 HAMACHER, STE 200B 15.9 miles

509 HAMACHER, STE 200B
WATERLOO, IL 62298
Categories: WATERLOO IL

509 Hamacher St Ste 201, 15.9 miles

509 Hamacher St Ste 201,
Waterloo, IL 62298
Categories: Waterloo IL

509 HAMACHER ST STE 103 16.0 miles

509 HAMACHER ST STE 103
WATERLOO, IL 62298
Categories: WATERLOO IL

1868 CRAIGSHIRE RD 16.4 miles

1868 CRAIGSHIRE RD
SAINT LOUIS, MO 63146
Categories: SAINT LOUIS MO

10716 New Halls Ferry Rd, 16.4 miles

10716 New Halls Ferry Rd,
Florissant, MO 63033
Categories: Florissant MO

83 PROGRESS PKWY 16.8 miles

83 PROGRESS PKWY
MARYLAND HEIGHTS, MO 63043
Categories: MARYLAND HEIGHTS MO

1066 EXECUTIVE PARKWAY DR STE 200 16.8 miles

1066 EXECUTIVE PARKWAY DR STE 200
SAINT LOUIS, MO 63141
Categories: SAINT LOUIS MO

2023 VADALEBENE DR, SUITE 150 16.9 miles

2023 VADALEBENE DR, SUITE 150
MARYVILLE, IL 62062
Categories: MARYVILLE IL

2136 Vadalabene Dr Ste A, 17.1 miles

2136 Vadalabene Dr Ste A,
Maryville, IL 62062
Categories: Maryville IL

637 DUNN RD STE 155 17.3 miles

637 DUNN RD STE 155
HAZELWOOD, MO 63042
Categories: HAZELWOOD MO

463 LYNN HAVEN LN 17.3 miles

463 LYNN HAVEN LN
HAZELWOOD, MO 63042
Categories: HAZELWOOD MO

637 DUNN RD STE 100 17.5 miles

637 DUNN RD STE 100
HAZELWOOD, MO 63042
Categories: HAZELWOOD MO

637 Dunn Rd Ste 135 17.5 miles

637 Dunn Rd Ste 135
Hazelwood, MO 63042
Categories: Hazelwood MO

11501 PAGE SERVICE DR 17.7 miles

11501 PAGE SERVICE DR
SAINT LOUIS, MO 63146
Categories: SAINT LOUIS MO

3446 MCKELVEY RD 17.9 miles

3446 MCKELVEY RD
BRIDGETON, MO 63044
Categories: BRIDGETON MO

7220 N LINDBERGH BLVD #STE 250-60 CARGO BAY BLDG 18.1 miles

7220 N LINDBERGH BLVD #STE 250-60 CARGO BAY BLDG
HAZELWOOD, MO 63042
Categories: HAZELWOOD MO

3440 DePaul Lane Ste. 208, 18.1 miles

3440 DePaul Lane Ste. 208,
Bridgeton, MO 63044
Categories: Bridgeton MO

102 N STATE ST 18.1 miles

102 N STATE ST
FREEBURG, IL 62243
Categories: FREEBURG IL

102 ROTTINGHAM, STE 2 18.5 miles

102 ROTTINGHAM, STE 2
EDWARDSVILLE, IL 62025
Categories: EDWARDSVILLE IL

1181 S STATE ROUTE 157 18.7 miles

1181 S STATE ROUTE 157
EDWARDSVILLE, IL 62025
Categories: EDWARDSVILLE IL

224 S WOODS MILL RD STE 360 S MED BLDG 19.2 miles

224 S WOODS MILL RD STE 360 S MED BLDG
CHESTERFIELD, MO 63017
Categories: CHESTERFIELD MO

900 S CENTRAL AVE 19.7 miles

900 S CENTRAL AVE
ROXANNA, IL 62084
Categories: ROXANNA IL

15421 CLAYTON RD STE 301 20.6 miles

15421 CLAYTON RD STE 301
BALLWIN, MO 63011
Categories: BALLWIN MO

325 MADISON AVE 20.7 miles

325 MADISON AVE
WOOD RIVER, IL 62095
Categories: WOOD RIVER IL

15620 MANCHESTER RD 20.7 miles

15620 MANCHESTER RD
ELLISVILLE, MO 63011
Categories: ELLISVILLE MO

16091 SWINGLEY RIDGE RD STE 150 21.2 miles

16091 SWINGLEY RIDGE RD STE 150
CHESTERFIELD, MO 63017
Categories: CHESTERFIELD MO

50 MONROE ST 21.4 miles

50 MONROE ST
SAINT CHARLES, MO 63301
Categories: SAINT CHARLES MO

233 CLARKSON RD 21.5 miles

233 CLARKSON RD
ELLISVILLE, MO 63011
Categories: ELLISVILLE MO

2101 COLLIER CORPORATE PKWY 22.5 miles

2101 COLLIER CORPORATE PKWY
SAINT CHARLES, MO 63303
Categories: SAINT CHARLES MO

2621 RAYMOND DR 23.0 miles

2621 RAYMOND DR
SAINT CHARLES, MO 63301
Categories: SAINT CHARLES MO

1794 ZUMBEHL RD 23.0 miles

1794 ZUMBEHL RD
SAINT CHARLES, MO 63303
Categories: SAINT CHARLES MO

17300 N Outer 40 Ste 104, 23.2 miles

17300 N Outer 40 Ste 104,
Chesterfield, MO 63005
Categories: Chesterfield MO

98 The Legends Pkwy Ste 108, 24.3 miles

98 The Legends Pkwy Ste 108,
Eureka, MO 63025
Categories: Eureka MO

17838 CHESTERFIELD AIRPORT RD 24.4 miles

17838 CHESTERFIELD AIRPORT RD
CHESTERFIELD, MO 63005
Categories: CHESTERFIELD MO

237b E Center Dr, 24.5 miles

237b E Center Dr,
Alton, IL 62002
Categories: Alton IL

623 W. 5TH STREET 24.7 miles

623 W. 5TH STREET
EUREKA, MO 63025
Categories: EUREKA MO

Scheduling a test is Fast and Easy, call our scheduling department or schedule your test online 24/7

*You must register by phone or online to receive your donor pass/registration prior to proceeding to the testing center

Accredited Drug Testing has drug testing locations in most cities and towns throughout the United States. Providing drug testing, alcohol testing, DNA testing and other related services. Most testing centers are within minutes of your home or office. Same day service is available in most cases. To schedule a test please call our scheduling department at 1-800-221-4291 or you may schedule your test online utilizing your zip code in which you are located.

Employers - Accredited Drug Testing provides easy, convenient, confidential and cost-effective drug testing services, including pre-employment drug testing, random drug testing, post-accident drug testing and reasonable suspicion drug and alcohol testing. We can also assist you with the implementation of your drug free workplace program with drug policy development, supervisor training, employee education and on-going consultation. In many cases a company certified as a drug free workplace can receive discounts on their workers' compensation insurance premiums along with lowering employee absenteeism, enhancing workplace safety and improving employee morale. To open a no cost employer drug testing account click here or call our office at 1-800-221-4291

Individuals - If you are an individual in need of a drug, alcohol or DNA test, Accredited Drug Testing is your one stop shopping for all your testing needs. Simply call our customer service staff at 1-800-221-4291 or you may register online. There is no need to open an account or be affiliated with any company. Accredited Drug Testing offers drug testing for personal, court ordered, probation, child custody or any other reason you may need! To schedule a test please call our scheduling department at 1-800-221-4291 or you may schedule your test online utilizing your zip code in which you are located.

Search Locations by State

Handy Resources

Comprehensive Online Resources for Drug Testing

  1. National Institute on Drug Abuse (NIDA)

    Provides comprehensive information on drug testing and its role in substance use disorder treatment.

  2. FDA: Drug Testing

    Explains the FDA's role and regulations concerning drug testing for consumers.

  3. PDR.net

    Provides detailed drug information and safety updates through a mobile-friendly platform.

  4. BeSafeRx - FDA

    Resource by the FDA to help consumers identify and choose safe online pharmacies.

  5. SAMHSA: Drug Testing Resources for the Workplace

    Resources and guidelines for drug testing in the workplace.

  6. Drugs.com

    Provides drug information, side effects, and interactions for consumers and professionals.

  7. Drug Abuse Screening Test (DAST)

    Online version of the DAST to help individuals assess whether they have a drug problem.

  8. Merck Manuals

    Consumer-friendly medical resource providing comprehensive information on a wide array of health topics, including drug testing.

  9. SAMHSA Store

    Provides access to resources and publications on substance use prevention and treatment.

  10. National Association of Boards of Pharmacy (NABP)

    Information on state boards of pharmacy and regulations, including those related to drug testing.

  11. CDC: Workplace Health Promotion

    CDC's resources on substance use and drug testing in the workplace.

  12. Mayo Clinic: Drug Testing

    General information about the procedures and types of drug tests.

  13. MedlinePlus: Drug Testing

    Offers information about various drug tests and their uses in medical diagnosis and treatment.

  14. University of Rochester Medical Center Health Encyclopedia

    Provides a detailed entry on drug testing, including how tests are conducted and what they detect.

  15. World Health Organization (WHO)

    International guidelines and information on public health, including substance abuse and drug testing.

  16. Healthline: Drug Testing

    Consumer health site offering information on how drug tests work and what they look for.

  17. WebMD: Drug Testing

    Provides a patient-oriented overview of drug testing and its purposes.

  18. National Center for Biotechnology Information (NCBI)

    Provides a vast database of scientific studies, including research on drug testing and its effectiveness.

AI Overview

Local Drug Testing Centers: A Comprehensive Guide

Local drug testing centers play a pivotal role in the enforcement of drug-free policies in workplaces, schools, and other institutions. They provide a necessary service for drug screening, ensuring public safety, enhancing workplace productivity, and contributing to overall community health. This guide covers the importance, services, and considerations involved in utilizing local drug testing centers.

Importance of Local Drug Testing Centers

Drug testing centers are crucial for identifying drug use and ensuring compliance with various legal and safety regulations. They help employers maintain a safe and productive work environment, assist law enforcement and legal professionals, and support health care providers in treating and advising patients on substance use.

Services Offered by Local Drug Testing Centers

  • Pre-Employment Screening: Testing potential employees to ensure they meet the employer's policies regarding drug use.
  • Random Drug Testing: Conducting unscheduled drug tests to deter drug use among employees or members of an organization.
  • Reasonable Suspicion Testing: Testing individuals who exhibit behaviors that suggest drug use, based on observed conditions explicitly articulated by trained supervisors.
  • Post-Accident Testing: Assessing employees for drug use after an accident to determine if drugs were a contributing factor to the incident.
  • Follow-Up Testing: Monitoring employees who have returned to work after participating in rehabilitation programs for substance use.

Choosing a Local Drug Testing Center

  1. Accreditation: Ensure the center is accredited by relevant health and safety authorities, indicating compliance with industry standards.
  2. Confidentiality: The center should uphold strict confidentiality policies to protect the privacy of individuals undergoing testing.
  3. Technology and Accuracy: Check that the center employs up-to-date technology and methodology for accurate and reliable testing results.

Benefits of Using Local Drug Testing Centers

Utilizing local drug testing centers offers numerous benefits:

  • Convenience: Local centers provide easy access for individuals and organizations, reducing the time and cost associated with travel.
  • Quick Results: Many local centers offer rapid results, which is critical for timely decision-making in employment and health care scenarios.
  • Support for Compliance: They assist organizations in complying with legal requirements and maintaining industry certifications and standards.

Local drug testing centers are essential for maintaining safe and compliant environments in various settings. By choosing a reputable and properly accredited center, organizations and individuals can rely on precise and efficient service to meet their drug testing needs.

Local Area Info: Cahokia

The Cahokia Mounds State Historic Site /k??ho?ki?/ (11 MS 2) is the site of a pre-Columbian Native American city (circa 1050–1350 CE) directly across the Mississippi River from modern St. Louis, Missouri. This historic park lies in southern Illinois between East St. Louis and Collinsville. The park covers 2,200 acres (890 ha), or about 3.5 square miles (9 km2), and contains about 80 mounds, but the ancient city was much larger. In its heyday, Cahokia covered about 6 square miles (16 km2) and included about 120 manmade earthen mounds in a wide range of sizes, shapes, and functions.

Cahokia was the largest and most influential urban settlement of the Mississippian culture, which developed advanced societies across much of what is now the central and southeastern United States, beginning more than 1,000 years before European contact. Today, Cahokia Mounds is considered the largest and most complex archaeological site north of the great pre-Columbian cities in Mexico.

Cahokia Mounds is a National Historic Landmark and a designated site for state protection. It is also one of only 23 UNESCO World Heritage Sites within the United States. The largest prehistoric earthen construction in the Americas north of Mexico, the site is open to the public and administered by the Illinois Historic Preservation Division and supported by the Cahokia Mounds Museum Society. In celebration of the 2018 Illinois Bicentennial, the Cahokia Mounds were selected as one of the Illinois 200 Great Places by the American Institute of Architects Illinois component (AIA Illinois) and was recognized by USA Today Travel magazine, as one of AIA Illinois's selections for Illinois 25 Must See Places.

Show Regional Data

Median Rent: Median gross rent in 2017: $794.

Poverty (overall): Percentage of residents living in poverty in 2017: 30.9%

Poverty (breakdown): (15.7% for White Non-Hispanic residents, 41.3% for Black residents, 30.4% for Hispanic or Latino residents, 34.7% for two or more races residents)

Land Area: 9.61 square miles.

Population Density:

Median Incomes:
      Estimated median household income in 2017: $30,535 (it was $31,001 in 2000)
      Estimated per capita income in 2017: $16,149 (it was $14,545 in 2000)
      Estimated median house or condo value in 2017: $51,044 (it was $38,200 in 2000) Cahokia:$51,044IL:$195,300

Races:
      Black alone - 8,415 - 58.6%
      White alone - 5,137 - 35.8%
      Two or more races - 296 - 2.1%
      Asian alone - 249 - 1.7%
      Hispanic - 127 - 0.9%
      American Indian alone - 25 - 0.2%
      Other race alone - 31 - 0.2%

The Odawa leader Pontiac was assassinated by other Indians in or near Cahokia on April 20, 1769.