| 1906 |
Antiquities Act, sponsoring the national monuments, becomes law. |
| 1909 |
August: John Wetherill, Byron L. Cummings, and W.B. Douglass reach Rainbow Bridge. |
| 1910 |
May: Monument declared. John Wetherill assigned as Custodian
(shared duty with Navajo National Monument). |
| 1933 |
First year of Rainbow Bridge-Monument Valley survey. |
| 1955 |
Visitation to Rainbow Bridge exceeds 1,000 people. |
| 1956 |
Mission 66 first funded by Congress.
March: President Eisenhower signs the Colorado River Storage Project Act.
October: construction of Glen Canyon Dam begins. |
| 1956 |
Memorandum of Agreement between the Bureau of Reclamation and NPS. |
| 1958 |
Secretary of the Interior establishes Glen Canyon Recreation Area
and designates NPS the administering Agency. Congress passes P.L.
85-868, transferring lands between NPS and the Navajo Nation. |
| 1963 |
January: BOR closes the gates of the west bank diversion tunnel at
Glen Canyon Dam. Lake Powell begins to fill.March: the east bank
diversion tunnel gates close, marking the official birth of Lake Powell. |
| 1964 |
Administrative and operational control of Rainbow Bridge National
Monument transfers to Superintendent of Glen Canyon Recreation Area. |
| 1965 |
Visitation to Rainbow Bridge exceeds 10,000 people. NPS installs
the first floating dock facility in Aztec Creek.
May: Memorandum of Agreement with the Navajo Nation is signed. Lake
Powell water enters the monument. Visitors can boat to within sight of
the bridge. |
| 1972 |
Congress passes P.L. 92-593, establishing Glen Canyon National
Recreation Area. |
| 1974 |
Jim Mike returns to Rainbow Bridge. Navajo singers sue NPS over
Lake Powell waters inundating lower Bridge Canyon. |
| 1978 |
Native American
Religious Freedom Act becomes law. |
| 1980 |
Visitation to Rainbow Bridge exceeds 100,000 people. |
| 1985 |
Bureau of Reclamation concludes that Lake Powell is not
contributing to any structural impairment of Rainbow Bridge. |
| 1989 |
Rainbow Bridge National Monument nominated (although never
designated) as a World Heritage Site. |
| 1993 |
General Management Plan finalized. |
| 1994 |
Hearth excavated at foot of
Rainbow Bridge, dated approximately 600 A.D. |
| 1995 |
Protectors of the Rainbow occupy the monument. Programmatic
Agreement signed, creating the Native American Consultation Committee. |
| 1996 |
Executive Order 13007, the Indian Sacred Sites proclamation. |