| Survey for Ryan's Slough railroad | Daily Times | MF 10 | 5/4/1883 | 3 | 1 | Railroad work | Ryan Slough | Ryan Slough, Railroad |
| Survey made by surveyor Herrick, sewer to run down to the bay | Daily Times | MF 10 | 6/22/1883 | 3 | 1 | Survey work | | Survey, Herrick, Health |
| Survey of 400 miles of Eureka Distr. done | Humboldt Times | MF 10 | 8/21/1921 | 14 | | Land Survey | Eureka Distr. Ferndale Scotia | Survey, Eureka Distr., E.B. Waston, Stanley Cosby |
| Survey of dam site on lower Mad River | The Humboldt Times | MF 10 | 10/7/1932 | 5 | 4 | Survey | Mad River Maple Creek | Dam Site, Mayor Sweasey, Committee |
| Survey of Eel for transportation | Humboldt Beacon | MF 2187 | 2/15/1990 | | | Survey | Eel River | Survey, Eel, River, Navigation |
| Survey of Eel River by Captain Johnston | Weekly Times | MF 10 | 8/30/1879 | 1 | 4 | Survey | Eel River Salt River Port Kenyon | Survey Of Eel River, Captain Johnston, Steamer Whitelaw |
| Survey of water depth on Humboldt Bay Bar | The Humboldt Times | MF 10 | 11/21/1907 | 3 | 1 | Survey | Humboldt Bay bar North Jetty | Survey, Water Depth, Humboldt Bay, |
| Survey on local rivers | Humboldt Times | MF 10 | 8/20/1957 | 5 | | Water resource Survey | Eel River Mad River Smith River | Water Resource Survey, State Water Code |
| Survey out Redding actually for timber purposes only | Morning Daily Humboldt Times | MF 10 | 6/15/1910 | 4 | | Survey work | Redding Cottonwood Creek | Survey, Timber , Actually |
| Survey recommended by Humboldt County Planning Commission for new road | Humboldt Times | MF 10 | 1/22/1949 | 1 | | Survey | Eel river Scotia Shively | Survey, Humboldt County Planning Commission, New Road |
| Survey to be carried out for new county road southward | Morning Daily Humboldt Times | MF 10 | 6/14/1910 | 1 | 4 | Survey work | | Survey, Road, Southward |
| Survey work being completed on 200 mile line | Humboldt Times | MF 10 | 4/3/1929 | 1 | 3 | Survey Work | Keddie Klamath Fills | Keddie, Survey Parties, 200 Mile Gap |
| Survey work by Div. of Highways to survey for route | Humboldt Times | MF 10 | 9/8/1912 | 1 | 6 | Survey Work | Eureka Willits | Survey Work, Div. Of Highways, Bond Issue |
| Survey work for future 299 highway | Humboldt Times | MF 10 | 4/13/1913 | 1 | 4 | Survey | Weaverville | Survey, 299 Highway, B.H. Burrell |
| Survey work stopped by Conners due being opposed by Mendocino County Board of Supervisors | Morning Daily Humboldt Times | MF 10 | 6/29/1910 | 1 | 2 | Survey work | Bell Springs Humboldt County Mendocino County | Conners, Opposed, New Route, Cost 2X, Mendocino County Board Of Supervisors |
| Surveying of possible state highway routes | The Humboldt Times | MF 10 | 12/21/1907 | 3 | 4 - 5 | Survey work | Trinity River North Fork Trinity Helena | Survey Crew, Possible Route, Ellery, State Highway |
| Surveying Orick economic potential | The Humboldt Times | MF 10 | 10/26/1958 | 16 | 7 | Surveying | Orick | Economic Potential, Surveying, Market Value, Dollars |
| Surveyor A.T. Smith and councilman Lovern inspected dam | Humboldt Times | MF 10 | 7/26/1888 | 3 | | Construction inspect | Mad river canal | Mad River Canal, A.T. Smith, Lovern Councilman, Inspected |
| Surveyor camps set up | The Humboldt Times | MF 10 | 11/15/1907 | 7 | 7 | Camps | Fort Seward Alderpoint | Surveyor Camps, Railroad |
| Surveyor Conners to survey for new overland road | Morning Daily Humboldt Times | MF 10 | 6/21/1910 | 5 | 1 | Survey work | Garberville | Surveyor, Conners, Overland Road |
| Surveyor George Connors states Martins Ferry-Bluff Creek road do more for county dev. then others promoted | Humboldt Times | MF 10 | 7/21/1909 | 1 | 7 | New roads | Martins Ferry-Bluff creek road Orleans bar Bold Hills | Martins Ferry- Bluff Creek Road, County Surveyor George Connors, Orleans Bar |
| Surveyor JMC, found new line for road to replace 17 mile trail. | Humboldt Times | MF 10 | 6/28/1888 | 3 | | New road | Rw Oak China Flat | Surveyor Jmc, New Line For Road, |
| Surveyor work for South Fairhaven has been finished | The Humboldt Times | MF 10 | 12/14/1907 | 5 | | Surveyor work | Fairhaven Eureka | Surveyors, W.C. Elsmore, Fairhaven, Minor Mill & Lumber Company |
| Surveyors boing work at Big Lagoon & Trutman place | Humboldt Times | MF 10 | 11/3/1920 | 3 | 4 | Survey Work | Big Lagoon Trutman Place Maple Creek | Surveyors, Big Lagoon Lumber Company |
| Surveyors busy above Ernest Roscoe ranch laying out proposed road | Humboldt Times | MF 10 | 10/9/1913 | 3 | 3 | Surveying work | Ernest Roscoe ranch Mattole John Stanton Ford | Surveyors, Proposed Road, Ernest Roscoe Ranch |
| Surveyors mapping out new route | Humboldt Times | MF 10 | 2/13/1927 | 6 | | Surveyors | Orick C. City | Surveyors, 101 Route |
| Surveys Completed on North Coast Water Sites by State | Humboldt Times | MF 10 | 12/9/1949 | 1 | 5 & 6 | Surveys | North Coast CA | North Coast Water Sites, Edward Hyatt, State Engr |
| Susie Baker Fountain states San Francisco reporter wrote up description of Klamath | Blue Lake Advocate | MF 2191 | 4/28/1966 | 5 | Susie Baker Fountain | Reporter | Klamath River | Susie Baker Fountain, Klamath River, Reporter |
| Suspended work | Humboldt Times | MF 10 | 9/22/1917 | 1 | 4 | Jetties | | Employment, Jetty, Quarry, Job Loss |
| Suspension bridge burned | Humboldt Times | MF 10 | 6/15/1926 | 1 | | bridge | Klamath Orleans | Suspension Bridge, Orleans |
| Sweasey Dam | Humboldt Times | MF 10 | 8/26/1939 | 1 | | Water Supply - Infrastructure | Sweasey Dam | Water Quality, Sweasey Dam, Water Filtration, Water Supply |
| Sweasey Dam | Humboldt Times | MF 10 | 7/8/1939 | 2 | 3 | Water Supply - Infrastructure | Mad River | Sweasey Dam, Mad River |
| Sweasey Dam | Humboldt Times | MF 10 | 7/9/1939 | 1, 3 | 7 | Photo | Mad River | Sweasey Dam, Mad River, Dedication |
| Sweasey Dam | Humboldt Times | MF 10 | 7/8/1939 | 2 | 3 | Water Supply - Infrastructure | Mad River | Sweasey Dam, Mad River |
| Sweasey Dam | Humboldt Times | MF 10 | 7/9/1939 | 1, 3 | 7 | Photo | Mad River | Sweasey Dam, Mad River, Dedication |
| Sweasey Dam | Humboldt Times | MF 10 | 8/9/1939 | 7 | 2 | Water Supply - Infrastructure | Sweasey Dam | Water Quality, Sweasey Dam, Water Filtration, Water Supply |
| Sweasey Dam | Humboldt Times | MF 10 | 8/9/1939 | 7 | 2 | Water Supply - Infrastructure | Sweasey Dam | Water Quality, Sweasey Dam, Water Filtration, Water Supply |
| Sweasey Dam | Humboldt Times | MF 10 | 8/26/1939 | 1 | | Water Supply - Infrastructure | Sweasey Dam | Water Quality, Sweasey Dam, Water Filtration, Water Supply |
| Sweasey Dam be cleared | Humboldt Times | MF 10 | 12/1/1955 | 9 | | Infrastructure-Dam | Sweasey Dam | Sweasey Dam, Cleared |
| Sweasey Dam Repair | Humboldt Times | MF 10 | 7/19/1956 | 13 | N/A | Dam | Mad River | Sweasey Dam, Mad River, Repair, Fish Ladder, Flood |
| Sweasey Reservoir lower water storage due to siltation | Humboldt Times | MF 10 | 9/21/1956 | 1 | 4 | Siltation level | Sweasey Reservoir | Siltation Level, Sweasey Reservoir |
| Swinth Mill in final stages of construction | Humboldt Times | MF 10 | 8/2/1951 | 10 | | Mill | Arcata | Swinth Mill, Arcata |
| T.A. Greig and his wife have sold Greig's Resort at Fernbridge to Paul Balestracci. | The Humboldt Times | MF 10 | 10/30/1919 | 3 | 3 | Business | Fernbridge | Resort, Sold |
| T.R. Emerson & wife to Margaret Fielding live in Arcata | Humboldt Times | MF 10 | 7/20/1909 | 4 | 4 | Real estate record | Arcata | T.R. Emerson, Margaret Fielding |
| Talk gave by Harvey Higgins, noted county has a planning commission | Humboldt Times | MF 10 | 8/6/1963 | 9 | 6 | Speech | Bella Vista Inn Humboldt County | Harvey Higgins, Rotary Lunch, Land Use |
| Teams busy hauling gravel | Daily Humboldt Times | MF 10 | 9/24/1910 | 6 | 5 | Road work | Glendale Blue Lake | Hauling Gravel, Road, |
| Teamster Pigeon dirt hauling to fill well | The Daily Humboldt Times | MF 10 | 4/26/1908 | 7 | 6 | Hauling work | Arcata | Hauling, Teamster Pigeon, Dirt, Well |
| Ted Menette celebrated 54th yr with Hammond Lumber Company | Humboldt Times | MF 10 | 4/10/1929 | 3 | 3 | Company | Hammond Lumber Company | Ted Menette, Hammond Lumber Company |
| Telegram sent by Harvey M. Toy of State Highway Commission to T.W. Hine | The Humboldt Times | MF 10 | 10/24/1925 | 6 | 3 | Telegram | Big Lagoon | Telegram, Harvey M. Toy, T.W. Hine, Construction |
| Telegraph line of North Pacific Telegraph Company | Daily Humboldt Times | MF 10 | 2/19/1878 | 3 | 2 | Telegraph Line | Trinidad Petaluma | North Pacific Telegraph Company, Trinidad, Petaluma |
