| PL clearing the 6 miles of redwood south of Shively | The Humboldt Times | MF 10 | 9/29/1907 | 1 | 1 & 2 | Land clearing | Shively Bryan's Bluff | Pl, Clearing, Survey |
| PL company acquires about 13,360 acres in the Creek area | Humboldt Times | MF 10 | 6/20/1940 | 1 | 1 & 2 | Land use | Yage Creek Scotia Lawrence Creek | Pl Company, Acquires, Creek Area, Scotia |
| PL Company has purchased Dolbeer- Carson Lumber Company | Humboldt Times | MF 10 | 12/16/1950 | 1 | | Purchase | Elk river Van Duzen Watershed Eureka | Pl Company, Dolbeer- Carson Lumber Company, William Carson |
| Pl intends to commence mill-building and lumbering operations opposite Eagle Prairie | Daily Times Telephone | MF 10 | 2/19/1886 | 3 | 2 | Lumbering Operations | Eagle Prairie Eel River | Mr. ?, Pacific Lumber Company, Mill-Building, Lumbering Operations |
| Places name | Humboldt Times | MF 10 | 10/6/1921 | 2 | | Names | Thief Camp Ranch Murphy Ridge | Places Names |
| Plan to commemorate place where Camp Curtis was | Humboldt Times | MF 10 | 9/13/1930 | 5 | 6 | Commemorate Place | Camp Curtis | Camp Curtis, Indian Wars |
| Plan to export Eel water to Arizona under study | Humboldt Times | MF 10 | 10/19/1963 | 1 | | Water use | | Plan, Export, Water, Arizona |
| Planing Mill burned to ground late yesterday | Humboldt Times | MF 10 | 9/25/1948 | 1 | | Fire | Arcata | Burned, Planing Mill, Arcata Lumber Services |
| Planning Board talking about river use | Humboldt Times | MF 10 | 7/8/1938 | 10 | 2 & 3 | River use | | Planning Board, River, Sacramento Valley |
| Planning Commission approved request | Humboldt Times | MF 10 | 7/18/1958 | 13 | 5 | Land Use | | Charles Folkerson, Planning Commission |
| Planning for div of Trin Riv South | Humboldt Times | MF 10 | 4/5/1954 | 1 | | Rivers | Trinity River South | Trinity River |
| Plans & specs being made for new bridge | Morning Daily Humboldt Times | MF 10 | 6/1/1910 | 1 | 4 | Bridge work | Eel Fernbridge | Plans & Specs, Bridge , County Surveyor |
| Plans & Specs for new courthouse accepted & approved by B.O.S. | Times Standard | MF 10 | 2/26/1958 | | | "Notes from Martha's Clippings " | | Courthouse, Plans & Specs, Accepted, Approved, B.O.S. |
| Plans & specs for new steel bridge over Salt River at Arlynda | The Daily Humboldt Times | MF 10 | 4/8/1908 | 6 | 6 | New bridge | Salt River Arlynda | Steel Bridge, Plans & Specs, County Clerk'S Office |
| Plans and specs for construction of revetment on Mad River | Humboldt Times | MF 10 | 8/14/1956 | 5 | | Plan | Mad River West end | Survey, Plans, Specs, Construction, Revetment, River, Approval, Bids |
| Plans approved by B.O.S. for new bridges | Humboldt Times | MF 10 | 5/15/1926 | 10 | 4 | Plans | Davis Creek Zanone Creek McNutt Gulch | B.O.S., Plans, New Bridges |
| Plans are underway for the extensions of the Co. Rd. | Humboldt Times | MF 10 | 3/31/1929 | 20 | 7 | Construction plans | Orcutt | Extension, Road, Construction |
| Plans completed for Blue Lake Union Elementary School | Humboldt Times | MF 10 | 10/18/1952 | 1 | | Plans | Blue Lake | Blue Lake Union Elementary School, Frank Georgeson |
| Plans for a Dodge Auto Dealership in Eureka | Humboldt Times | MF 10 | 6/6/1923 | 3 | | Plans | Eureka | Eureka, Dodge Auto Dealership, J.C. Harrison, Site, Construction |
| Plans for another regatta, City council voted | Humboldt Times | MF 10 | 8/6/1930 | 3,10 | | New race, vote | Big Lagoon | Regatta, Big Lagoon, City Council Vote |
| Plans for centennial released | Humboldt Times | MF 10 | 1/30/1948 | 1 | | Centennial | | Redwood Empire, Centennial |
| Plans for new freeway, and land purchased | Humboldt Times | MF 10 | 8/25/1960 | 1 | 3 | Land use | Fields Landing Elk River | New Freeway, Fields Landing |
| Plaza Ave, Albee Stadium Article | Humboldt Times | MF 10 | 6/20/1926 | 10, 11 | | Article, Road descrip | Arcata | Plaza Ave, Albee Stadium Article |
| Pleasure Park description | The Humboldt Times | MF 10 | 10/2/1932 | 4 | 6 | Park description | Eureka | Pleasure Park |
| Plywood mill & Pulp paper mill will built on Samoa Peninsula | Humboldt Times | MF 10 | 10/19/1957 | 1 | 7 & 8 | Building on Samoa Peninsula | Samoa Peninsula | Owen Cheatham, G - P Corp, Plywood Mill , Pulp Mill |
| Poinsett land | Arcata Union | MF 713 | 4/11/1903 | 8 | 3 | Agriculture, crops | Arcata | Agriculture, Mr. Poinsett |
| Point Gorda Lighthouse & Fog Station now completed | The Humboldt Times | MF 10 | 9/14/1911 | 3 | 2 - 3 | Lighthouse | Point Gorda Lighthouse | Point Gorda Lighthouse |
| Poisoning of animals from Little River Clams | Humboldt Times | MF 10 | 8/16/1923 | 1 | | Ecology | Little River | Poisoning, Little River, Clams |
| Pool Improvements for Freshwater pool being made | Humboldt Times | MF 10 | 8/12/1933 | 5 | 4 | Pool improvement | Freshwater Pool | Improvements, Pool, Swim Meet |
| Poor quality photos of YMCA camp, Elk River Pumping Station | Humboldt Times | MF 10 | 6/22/1924 | 13 | | Photos, River Use | Redway Elk River | Ymca Camp, Elk River Pumping Station |
| Population | The Daily Humboldt Times | MF 10 | 1/7/1908 | 1 | 2 | Population | Eureka | Population |
| Population & Article on Mckinley Statue | Humboldt Times | MF 10 | 9/24/1950 | 2,3 | | Popul. & Article | | Population, Mckinley Statue, Haig Patigian |
| Population Facts in Humboldt County | Humboldt Times | MF 10 | 8/1/1939 | 1 | 7 | Population Facts | Humboldt County | Vehicles Registered, Welfare Caseload |
| Population increase in Eureka | Humboldt Times | MF 10 | 10/12/1913 | 7 | 3 & 4 | Population size | Eureka | Population, Grew, Eureka |
| Population of Arcata | Weekly Times | MF 10 | 6/19/1880 | 1 | | Population | Arcata | Arcata, Population |
| Population of Eureka | Humboldt Times | MF 10 | 8/20/1948 | 7 | | Population | Eureka | Eureka, Population |
| Population of Eureka | Humboldt Times | MF 10 | 1/2/1949 | 14 | | Population | Eureka | Eureka, Population |
| Port Rayon's economic threat | Humboldt Times | MF 10 | 12/29/1977 | | | Port Rayon | Eureka | Port Rayon, Eureka Economy |
| Portion of waterfront extended rapidly by ballast | Daily Humboldt Times | MF 10 | 3/28/1878 | 3 | 1 | Extending waterfront | | Waterfront, Extend, Ballast |
| Porty of men making arrangements | Daily Times | MF 10 | 3/17/1883 | 3 | 2 | Drains working | | Sewer System, Water Lines |
| Possibility of railroad from Medford to Crescent CIty | Humboldt Times | MF 10 | 10/20/1909 | 1 | 3 | Article | Medford Crescent City | Medford, Crescent City, Railroad |
| Potato blight | Daily Humboldt Times | MF 10 | 11/12/1880 | 3 | | New report | Sonoma County | Potato Blight |
| Potato Blight affects Arcata Bottom | Humboldt Times | MF 10 | 6/20/1954 | 7 | | Agriculture | Arcata | Agriculture, Potatoes, Arcata, 19Th Century |
| Potato Blight is occurring in Humboldt County | The Humboldt Times | MF 10 | 8/20/1916 | 1 | 2 | Potato Blight | Fortuna area | Potato Blight |
| Potato blight, Bridge over Mad river needs repairs | Weekly Times | MF 10 | 9/30/1879 | 1 | | Bridge work, Potato blight | Mad River Arcata Bottom | Potato Blight, Arcata Bottom, Bridge Work |
| Potato crops failure due to blight | Humboldt Times | MF 10 | 8/2/1888 | 3 | 3 | Crop failure | Arcata Bottom Mad river | Potato Crops, Arcata Bottoms, Blight |
| Potter Valley Diversion discussed | Humboldt Times | MF 10 | 8/9/1938 | 2 | 1 | Discuss | Potter Valley Eel Basin | Potter Valley, Discussed |
| Poulos & McEwen low bidder for grading & surfacing contract on 101 | Humboldt Times | MF 10 | 1/14/1937 | 1 | 7 | Legal Notice | Trinidad McNeill's Ranch | Bidder, Grading, Surfacing, Poulos & Mcewen |
| Power plant work to start | Times Standard | MF 10 | 11/10/1960 | 1 | | "Notes from Martha's Clippings " | | Ace, Pg&E, Nuclear Power Plant |
| Preliminary Plans for new County Hospital | Humboldt Times | MF 10 | 2/7/1929 | 1 | | Preliminary Plans | Eureka | Preliminary Plans, County Hospital, Article |
