Steamboat Slough was originally referred to as the "Middle Fork" of the Sacramento River, (click below) according to the map from 1852, and official surveys

  for the federal government by Mr. Ringgold, chief surveyor at that time.   In the 1852 map there is an area referred to as "Hog'sback Shoal" on the Middle Fork, which is probably in close proximity to where Snug Harbor is today.  However, very soon thereafter, maps began referring to the waterway as Steamboat Slough.   A noted author of the time, Mr. Hutchings, in his 1862 book of California refers to it as Steamboat Slough in his sketches.. The 1949 Guide book of "California Place Names" says on page 320:  "Steamboat Slough {Yolo}  When the Sacramento was first navigated fewer obstructions to navigation were encountered in Steamboat Slough than in old Sacramento River, as the other branch is called.  For many years the slough was therefore the channel preferred by navigators...."    You can read history of the Delta King and Delta Queen steamboats for a sample of river travel back then.
   See our new page "Historic shipwrecks on Steamboat Slough"  or the summary by the state:  Shipwrecks of the Sacramento River including Steamboat Slough, Cache and Sutter Sloughs.
 

    From old maps, historical books or commentaries and the recorded documents for the property we call "Snug Harbor" we know that a small island on Steamboat Slough was sold by the State of California to G. W. Blake in 1875.  Mr. Blake was a builder in the Sacramento area and was listed as one of the contractors approved to build the state capitol building.  (The state Geologist for the 1855 . Geological Map for the Railroad route to the Pacific Ocean See 1855 map is listed as William P. Blake.  Perhaps these two Blakes are related?)    Anyway, Ryer  island was considered part of Solano County, not Sacramento County as many people assume.   There may have been a time it was considered part of Yolo county, as some old maps indicate.  In the meantime, Steamboat Slough continued to be one of the routes to Sacramento, as the captain's map below shows.
 

     In 1930 the family entered into an agreement with the state to have dredging soils from Steamboat Slough be placed at the north end of the island, thereby making it a peninsula attached to much larger Ryer Island.  By 1945, the land had been sold to the Martin family, who began to sell off residential parcels to friends who wanted to build their own waterfront homes on Steamboat Slough.  The north half of the peninsula subdivided into residential parcels with a private road running down the middle to the resort property also in development in the 1940's.  The oldest Solano County permit & map we still have in hand is dated 1959, and the first parcel subdivisions (see below maps) are dated 1945.  Recorded land records for the peninsula known as Snug Harbor  1875 Land Grant map for the island that became Snug Harbor

     Ryer Island was a naturally-formed island area of the Delta, but was called Sutter and Merritt on the first official maps of the area between 1840 1860.  By the late 1860's it was called Ryer, and had received ongoing improvements to its levees in the early 1900's, 1930's and so on.  As early as 1852 writers noted there were "Snug little cabins on Steamboat Slough"!  Ships captains wrote in their ship logs about seeing "flickering campfires" along the banks, and about being stuck on the sandbars at Hog's Back Shoal for twelve hours while they waited for higher tides. 

     One of the first water projects in California done by the agency that would become part of the US Army Corps of Engineers was to make a very sturdy retaining wall at the north end of Steamboat Slough for tie-off by the paddie wheelers.  There are some REALLY funny but sad stories of the antics of the paddlewheel captains on Steamboat Slough!  *new*(see Paddle Wheelers #1 and Paddle Wheelers #2)

     There was a period when Steamboat Slough was almost impassable for the larger ships because the silt from mining in the foothills washed down the Sacramento River with winter and spring runoff, and literally filled up Steamboat Slough.  But dredging of the slough opened it to navigation again.  When the federal government agreed by 1917 legislation to assist California in building more secure levees and dredging key rivers of the Delta, Ryer Island and Steamboat Slough were included in the major project.  Hence, the levees of Ryer Island are listed as "Project Levees" and Steamboat Slough is one of the rivers to be maintained for navigation.  At the time the small island became a peninsula attached to Ryer Island, it was called "Martin's Island"

Below are sections of maps from 1845 to about 1965, showing our area of the Delta, with notations about Ryer Island or Snug Harbor added to some of the maps to help the viewer understand the particular map.  "CLICK" on the maps or links to see these in full size.
 

The above shows a Delta slough that has almost been clogged by silting over the years.  Steamboat Slough was dredged several times to keep it open for navigation, per the federal and state agreements.

Artist's vision of the nighttime run of steamboats on Steamboat Slough as this is the time many ships entered this section of the Sacramento River route to Sacramento

Right side of this sketch shows a paddlewheel steamer leaving the north end of Steamboat Slough to join the boat traffic on the Sacramento river north of Walnut Grove.

Hutchings Sketches of California #1

1895 Cyclist's map
http://ryerisland.com/images/maps/historic/1895_cyclers_map.jpg
1897 map - http://ryerisland.com/images/maps/historic/ryer1897.gif



1901 Southern Pacific Railway map - http://ryerisland.com/images/maps/historic/railway1901.jpg
1906 Official Survey Map of Delta area of California
1935 map showing small island before it became t
he peninsula we call Snug Harbor
1963survey.pdf

1935 Soils map of the Delta, including Ryer Island
http://ryerisland.com/images/maps/historic/1935soils.jpg

Article summarizing the timing for reclamation
of the major islands of the Delta

For many years, Steamboat Slough was the "preferred route" because it was the shorter more direct route between Rio Vista and Sacramento as noted below: